Cigre Take Away bijeenkomst 28 maart Study Committee A1

Cigre Take Away bijeenkomst 28 maart 2016 Study Committee A1

SC A1 Highlights van Werkgroepvergaderingen Technische bijeenkomst woensdag

SC A1 Highlights WG vergaderingen Onderverdeling in vier hoofdonderwerpen A1.01: Turbogenerators 7 WG s actief, NL actief in 3 WG s A1.02: Hydrogenerators 9 WG s actief, NL actief in geen WG A1.05: New Technologies 2 WG s actief, NL actief in 1 WG A1.06: Motors 6 WG s actief, NL actief in 1 WG

SC A1 Highlights WG vergaderingen Binnenkort wordt de brochure van werkgroep A1.29 ter beoordeling aan de observer en national members van SCA1 voorgelegd: Guide on New Generator-Grid Interaction Requirements Vastgesteld is dat de conclusies vriendelijk geformuleerd zijn (TSO, ENTSO-E) Onderwerp impact Grid Codes is binnen SCA1 een heel gevoelig onderwerp Belanghebbenden wordt geadviseerd kennis te nemen van dit document en indien men opmerkingen en aanvullingen heeft deze binnen 6 weken na het ter beschikking komen van het document terug te koppelen

SC A1 Highlights WG vergaderingen A1.39 Application of dielectric dissipation factor measurements on new stator coils and bars

SC A1 Highlights WG vergaderingen Interesting for NL A1.33 Guide for Cleanliness and Proper Storage of Generators and Components A1.44 Guideline on Testing of Turbo and Hydrogenerators A1.50 Quality Assurance Testing Requirements for Turbogenerator components A1.51 Monitoring, Reliability and availability of Wind Generators

NSC A1 Highlights WG vergaderingen N.a.v. het succes van werkgroep A1.39 m.b.t. het inventariseren van resultaten van tan delta metingen: Er gaan stemmen op om hetzelfde te gaan doen voor: Deelontladingsmetingen Wikkelkopvibratie Gezien het grote aantal werkgroepen mag een nieuwe werkgroep pas starten als een andere werkgroep zijn werk afgerond heeft.

SC A1 Technical Meeting Preferential subjects SC A1 Paris 2016: PS1 Developments of Rotating Electrical Machines and Experience in Service PS2 Asset Management of Electrical Machines PS3 Rotating Machines for Renewable and Dispersed Generation

SC A1 Technical Meeting 19 Papers geaccepteerd (1 NL paper): 14 PS1, 4 PS2, 1 PS3 Aandachtsgebieden Elektrisch magnetisch design (6) Grid relateerde ontwikkelingen (6) Conditiebewaking (4) Isolatie design (3) Kwaliteitsissues en praktijk falen (2)

SC A1 Technical Meeting Aantal bijdragen tijdens technical meeting: 41 (3 uit NL) Overall indruk: Beperkte discussie Oorzaak: Veel vragen van de special reporters waren gericht aan de auteurs. Antwoorden auteurs deels interessant

SC A1 Technical meeting Onderwerpen die tot discussie hebben geleid: NL paper A107 Root Cause Analysis of 450 MVA generator stator core fault Discussie over het tijdig kunnen achterhalen, invloed overgang base load naar start-stop bedrijf, designmaatregelen Discussie over bruikbaarheid Elcid meting - Meer ervaringen dat Elcid meting een grote bliksluiting niet vindt - Bevestiging van experts dat Elcid meting niet geschikt is voor het vinden van fouten dieper in de kern

SC A1 Technical Meeting Onderwerpen die tot discussie hebben geleid: Paper A105 Ensuring High quality insulation system of large motors Design & testing requirements Discussie over kwaliteit statorwikkelingen grotere motoren en meerpolige generatoren: - Wikkelkopontladingen, te kleine afstanden op fase scheiding, ijzerkrullen in wikkelkopgedeelte statorwikkeling - Slechte ervaringen klanten - Bagatelliserende fabrikanten - Inadequate internationale standaarden - Noodzaak tot klantspecifieke specificatie

Opmerkelijke zaken: Paper A1-109: Improved Generator Performance with a Nanocomposite High Voltage Insulation System for Stator Windings A Status Report ter SC A1 Technical Meeting Omgaan met verandering van base load bedrijf naar cyclisch bedrijf voorkoming van vermeende versnelde veroudering van bestaand isolatiesysteem van grote turbogeneratoren: Temperatuur statorwikkeling constant houden door regeling koeling Paper A1-111: Voith Hydro s experience with the aging of insulation I.g.v. cyclisch bedrijf vertoonden staven geen versnelde veroudering in vergelijk met staven base load bedrijf

SC A1 Technical Meeting Paper A1-202 (Canada): Progress in Interpreting On-line Partial Discharge Test Results from Motor and Generator Stator Windings Poging om niveaus van PD te definiëren: Distribution of Qm (mv) for air-cooled generators with 80 pf sensors

SC A1 Technical Meeting Paper A1-203 (Spain): Assessment of manufacture quality of stator windings insulation of rotating machines by means of macrographic analysis

SC A1 Technical Meeting Wat ontbrak c.q. is gemist: Discussie over grid codes implicatie. Oorzaak: - Papers waren gericht op het vinden van oplossingen - Het ontbreken van vragen van de special reporters - 1 inbreng op de enige aan dit onderwerp gerelateerde vraag Wikkelkopvibratie. Oorzaak: - Geen papers ingediend over dit onderwerp - Het ontbreken van vragen van de special reporters

SC A1 Vooruitblik Colloquium SCA1 Wenen September 2017 Voorstel Colloquium SCA1 India Februari 2019

SC A2 Transformatoren Evaluatie Parijs 2016

Inhoud SC A2 Transformatoren 1. Meeting SC A2 (maandag 22 aug. 2016) 2. SC A2 oral session (vrijdag 26 aug. 2016) 3. Tentoonstelling.

1. SC A2 meeting SC A2 Transformatoren WG A2.50 (Effect of distributed energy sources) Stopt i.v.m. gebrekkige voortgang. De al beschikbare data komt in een position paper. WG A2.56 (Transformer efficiency) Zoekt leden. JWG A2/D1.51 (Improvement to PD measurements for FAT and SAT of Transformers) Zoekt meetdata combinatie UHF PD-meting en de klassieke PDmeting voor controle gevoeligheid.

2. SC A2 oral session Preferential Subjects SC A2 1 Advances in Transformer diagnostics and monitoring. 16 papers, 8 vragen, 26 bijdragen. 2 EHV/UHV and EHVDC/UHVDC Transformers and their components. 11 papers, 6 vragen, 11 bijdragen. 3 Transformer windings. SC A2 Transformatoren 11 papers, 7 vragen, 17 bijdragen. Bijdragen uit 25 verschillende landen tijdens de A2 sessie (vrijdag 26 augustus)

2. SC A2 oral session PS 1 : Advances in Transformer diagnostics and monitoring. Monitoring and diagnostics: DGA / temperaturen / PD / UHF-PD / SFRA. Verschillende systemen en verschillende strategieën. Welke units? (alleen kritische / allemaal / continu / tijdelijk). Hoe van data naar informatie? Restlevensduur bepaling : SC A2 Transformatoren Methanol als indicator voor veroudering i.p.v. DP meting. Nog veel discussie met zelfs tegenstrijdige conclusies.

2. SC A2 oral session SC A2 Transformatoren PS 2 : EHV/UHV and EHVDC/UHVDC Transformers and their components. Design : Het gebruik van een wikkelingsmodel voor aantonen kortsluitvastheid i.p.v. de complete transformator. Biologisch afbreekbare olie (natural esters) voor Um > 420 kv en HVDC?. Shunt reactors : Ontwikkeling OLTC voor een groter regelbereik. (0 tot 80 % van het maximale MVAr vermogen).

2. SC A2 Oral session PS 3 : Transformer windings. SC A2 Transformatoren Ontwerp : 3D ontwerptools (elektrisch / thermisch (CFD) / multi physics). Ontwikkeling Cast resin transformator voor Um =123 kv Testen : Verificatie kortsluitvastheid. Stootspanningstest met afwijkende golfvormen (niet c.f. IEC).

3. Tentoonstelling SC A2 Transformatoren Regelschakelaars Stapspanning van max. 4 kv => 6 kv. Nominale stroom 1300 => 1600 A (1800 A). Modulaire opbouw. Introductie Febr. 2017

SC A2 Transformatoren Bedankt voor uw aandacht

A3-107 (NL, young engineers) : Overspanningen aan 50 kv-zijde Capacitieve overdracht Traveling waves Transformer Eigenfrequenties Resonantie tussen Xtrafo en Ccable Invloed trapstand Ferro-resonantie tgv zwevend sterpunt 50 kv en VTs A3-119: onduidelijke ferro-resonantie case met 420 kv GIS in Emiraten Ferroresonantie in GIS wel bekend tgv kleine capaciteit aan zijde VTs en grote capaciteit stuurcondensatoren over de open CB (TB 569). VTs met luchtspleet in de kern helpt.

A3-116: (Terna) CVT met speciale uitgang (capacitieve deler) A3-305: (Rusland) zeer nauwkeurige weerstandsdeler A3-104: (HQ) behalve PQ, foutplaats-localisatie, phasor-measurements, advanced protection, voltage and var regeling Optical VT/RCVT WG A3.31 Electronic VT C divider R divider CVT Inductive VT HV MV LV Eirgrid: meer THD, niet door toepassingen, maar door meer kabels DC 15 Hz 50 Hz 100 Hz 1 khz 10 khz 100 khz 1 MHz 10 MHz

A3-108: KEMA-HPL Éénfasige en drie-fasige dubbel-synthetische beproevingen voor de hoogste spanningen Short-circuit current supply circuit Second synthetic stage First synthetic stage A3-102: 345 kv serie compensatie met Fast Protective Devices

A3-113: Perfluoroketonen A3-114: Fluoronitrilen Dit zijn bijmengsels bij natuurgassen in lucht. Het mol-percentage is kritisch, maar beheersbaar, zegt men. Dielectrische eigenschappen beduidend slechter dan van SF 6 -gas, met name voor het onderbreken van stromen. Verder is er nog weinig over gepubliceerd. LCA is veel beter dan met SF 6 -gas, maar feitelijk nog onvergelijkbaar.

A3-109: KEMA-HPL Test circuit met 17 Hz om DC foutstroom onderbreking te simuleren met voldoende MW-power. DC stroomonderbreking leidt tot overhevelen van magnetische energie (½LI²) naar elektrische energie (½CU²), waardoor zeer hoge overspanningen ontstaan, die door MOSA begrenst moeten worden en waarbij de energie gedissipeerd. Anderen stellen two-part-test voor waarbij MOSA apart beproefd wordt. A3-106 en A3-117 tonen alternatieve schakelaar technologiën; A3-112 een speciale MOSA

A3-204: compacte temperatuur sensoren

A3-304: synchroon schakelen met CB met zeer weinig mechanische spreiding

Cigre Take Away bijeenkomst 28 maart 2016 Study Committee B1

B1 Insulated Cable key take-aways Arnhem, 28 september 2016 Sander Meijer Sander.Meijer@dnvgl.com

Content Introduction Summary of papers & main conclusions Prices.. New Technical Brochures Future topics new Task-forces and Working groups

Introduction Study Committee (SC) B1 is responsible for all aspects regarding land and submarine insulated cable systems. The scope of work of SC B1 is theory, design, applications, manufacture, installation, testing, operation, maintenance and diagnostic techniques for AC and DC cable systems.

Summary of papers & main conclusions In total 39 papers in the following three topics (preferential subjects): Feedback from newly installed or up graded cable systems Best use of existing cable systems Insulated cables in the power system of the future All papers have been reviewed by the different members of the national committee Two Dutch papers: Learning from on-line monitoring of medium voltage power cables with PD and fault location Use of Aluminum in Conductors and Sheaths of EHV Power Cable Systems Eight Dutch prepared contributions during the session

Summary of papers & main conclusions PS1 Feedback from newly installed or up graded cable systems Increase of transmission capability Modelling of bottlenecks, HVDC cables Improvement of reliability testing vs quality control New and novel designs or installation methods installation speed Special construction to allow seismic related and thermal movements What is your experience with testing vs quality control?

Summary of papers & main conclusions PS2 Best use of existing cable systems Condition assessment & diagnostic testing of cable systems on-line/onsite, DGA Trends in monitoring cables and accessories on-line PD, sheath currents Upgrading methodologies and related experiences RTTR Trends in maintenance strategies TBM/CBM/RCM, robots, sea cable locating On-line measurement and locating of partial discharges Plan-Do-Check-Act How to transfer into test/design requirements? On-line monitoring of sheath currents to detect sheaths faults or SVL faults

Summary of papers & main conclusions PS3 Insulated cables in the power system of the future Higher voltage level for AC and DC cables Increased # suppliers New functionalities expected from cable systems Dynamic loading Integration of cables and accessories in the network Transition, Environmental Innovative cable types Dynamic cables, modelling, superconducting Use actual wind profile to design export cable 3,500 mm 2 aluminium conductors Superconducting cable What kind of innovations have Dutch potential?

Prices Technical Committee Award CIGRE Fellow Award

New knowledge available 606: Upgrading & Uprating of Existing Cable Systems 610: Offshore Generation Cable Connections 622: Recommendations for Testing DC Transition Joints for Power Transmission at a Rated Voltage Up To 500KV 623: Recommendations for Mechanical Testing of Submarine Cables 640: A Guide for Rating Calculations of Insulated Cables 652: Guide for the operation of self contained fluid filled cable systems

New task-forces and working groups WG B1.58: Asset Management in MV Cables Networks (!!) WG B1.60: Maintenance of HV Cable Systems Update TB 279 WG B1.61: Installation of HV Cable Systems Update TB 194 TF B1.62: Updating of TBs for EHV-DC and UH-VDC Cables Systems TF B1.63: Specifications for HVAC Dynamic Cables above 36 kv TF B1.64: Evaluation of Armour Losses TF B1.65: Installation of offshore Cable Systems Interested to participate in one of the international or national shadow groups, please contact me at sander.meijer@dnvgl.com

B2 Overhead Lines Key Take-aways

Rob Stephen President of Cigre First President from B2 B2 General

Two tutorials held Tutorials Guide to Overall line design (AC & DC) Guide to the conversion of existing AC lines to DC operation

Samenvatting papers en belangrijkste conclusies 39 papers over de volgede onderwerpen (preferential subjects): PS 1 Overhead Lines for high power transfer capacity PS 2 Project management, construction and maintenance PS 3 Application of new materials and technologies De papers zijn beoordeeld door de leden van het national studiecomite Nederlandse paper Appropriateness of concrete poles for 400 kv Wintrack

Samenvatting papers en belangrijkste conclusies PS 1 Overhead Lines for high power transfer capacity Design for AC and DC Lines including dedicated metallic return Climatic and environmental considerations Influence of operational aspects on reliability and line security Belangrijk onderwerp voor Nederland, maar beperkt aantal papers direct nut voor Nederland AC naar DC Klimaatomstandigheden lokaal

PS1 B2-106 Compact lines with pivoted insulated cross-arms. General stability design criteria Vaklengte terug van 4 tot 6 km naar 2 tot 3 km

PS1 B2-114 Monitoring and forecasting ice loads on a 420 kv transmission line in extreme climatic conditions

PS1 B2-110 Monopole 220 kv tubular tower of steel tubes and cast steel without visible connections. Visuele aspecten spelen een rol, ook in een lavagebied in IJsland

Samenvatting papers en belangrijkste conclusies PS 2 Project management, construction and maintenance New methods for construction, replacement and refurbishment Experience with contracting and financing models Reliability evaluation of installed components and their change with time Meeste papers in meer of mindere mate interessant voor Nederland Nieuwe manieren geleidertrekken Geleidergedrag

PS2 B2-206 Portable X-ray system for in situ detection of broken ACSR strands at suspension clamps: field results and equipping the LineScout robot

Samenvatting papers en belangrijkste conclusies PS 3 Application of new materials and technologies Conductors, insulators, fittings and structures Experience and trends Specification and test requirements for line components Beperkte relevantie voor Nederland Innovatieve mastontwerpen Insulated crossarms Conductors

PS3 B3-309 Design, testing and installation of innovative 380 kv Dutton Rosental towers

B3-309

PS3 B2-308 A new design of high voltage overhead line using composite poles

PS3 B2-304 Appropriateness of concrete poles for 400 kv Wintrack

Technical Brochures Meteorological data for assessment climatic loads TB 645 Guide to Operation of conventional conductors above 100 C TB 643 Coating for protecting overhead power network equipment in winter conditions TB 631 Methods for the optimized design of OHL TB 638

Binnenkort afgerond Werkgroepen Remedial actions for aged fittings & repair of conductors Experience with the mechanical performance of new conductor types Management guidelines for outsourcing OHL technical expertise The use of robotics in assessment and maintenance of OHL 21 werkgroepen bezig In voorbereiding Safe Handling and Installation Guide For HTLS Conductors Sustainability of OHL Conductor life assessment and life extension

B3 Substations HIGHLIGHTS SC B3 Piet Knol

Leden nationaal comité B3 Substations

B3 A Week Full of Activity! 10 Working Group (WG) Meetings: Sat Aug 20 throughout Fri Aug 26 Green Book review on Sun Aug 21 Mon Aug 22 CIGRE Opening Session, and Two B3 Tutorials (80+ attendees!): Air Insulated Substation Design for Severe Climates SF 6 Responsible Use and GIS Residual Life Affects Tue Aug 23 - B3 Poster Session Wed Aug 24 - B3 Technical Session Thu Aug 25 - B3 Anual Meeting

B3 New Brochures

B3 B3:45 Application of non SF6 Gasses B3:46 Guidelines for Safe Work methods in Substations groups New Working

B3 Papers 16 PS1 / Advances in Substation technology GIS and GIL developments including DC technologies. integrating non-conventional instrument transformers. integrating new materials and new technologies into substations. HDVC hybride isolatoren GIL gelijkspanning RC dividers HDVC GIS/GIL Non Conventional Instrument Transformers NCIT Up scaling range van MTS

B3 Papers 16 PS1 B3-105 170kV Toepassing non SF6 isolatie medium GIS Zwitserland

B3 Papers 16 PS1 B3-106 145kV non SF6 GIS ontwerp Zwitserland Isolatie // Blusmedium

B3 Papers 16 PS1 B3-108 145kV Advanced 145kV Insulation and Switching concepts Duitsland Clean Air Vacuüm interruptor

B3 Papers 16 PS1 B3-111 2nd Generation DC Grid access for offshore wind farms Duitsland

B3 Papers 16 PS1 B3-114 Intelligent Robot for Electronic Equipment Inspection China

B3 Papers 16 PS2 / Developments And new thinking in Substation Design integrating iec 61850 into existing substations. Maximising substation availability. Modular, pre-fabricated, fast deployment and off-shore substation solutions. adaption of substations to meet emerging power system requirements. Toepassingen 61850 Brown Field Toepassen MTS bij vervanging AIS Substation Mobile Substations Uprateing Substations (increase short circuit levels)

B3 Papers 16 PS2. B3-204 Large renewable energy adoption Japan

B3 Papers 16 PS2. B3-208 Bus Node A Novel Substation Concept Duitsland

B3 Papers 16 PS2. B3-209 3D Substation Design Software (BIM)

B3 Contributions 16 PS2 Floating offshore substation

B3 Papers 16 PS3 / evolution in Substation management Risk quantification and optimized asset decision making, substation economics, maintenance management. customer and stakeholder interaction with design and life cycle management. substation asset performance, residual life, health and condition metrics. substation auxiliary and ancillary systems. Knowledge management, design methodologies and training.

B3 Papers 16 PS3 RF Sensor Development AIS Aging => challenges of Asset management UHV 1200kV India PD meeting met UHF sensoren Impact Renewables to the Grid code Circuit breaker Retrofitting

B3 Papers 16 PS3 B3-310 ENABLERS FOR COST SAVING IN AIR INSULATED SUBSTATION ASSET MANAGEMENT

B3 Papers 16 PS3 B3-310 Pre-Fabricated / Fast Deployment Substations

B3 Contributions 16 PS3 / evolution in Substation management SUBSTATION ROBOT FOR EQUIPMENT INSPECTION

Cigré B4 HVDC and power electronics C.G.A. Koreman TenneT TSO BV

Content Introduction Preferential subjects Relevant for The Netherlands DC grids Converter design FACTS and PE Conclusions

Introduction Three preferential subjects in the B4 session (HVDC) 45 papers published 1 about NordLink (AC DC interaction) 70+ prepared and spontaneous contributions 200+ people attending the session

Preferential subjects HVDC systems and their applications FACTS and other PE systems for transmission systems DC, FACTS and other PE systems for distribution systems Planning and implementation New technologies, new concepts Refurbishment Servicing and operating experience Integration of renewables

Relevant for The Netherlands DC grids Grid design and topologies Functional requirements DC circuit breaker Valve design and converter topologies Switching elements DC short circuit capabilities FACTS and PE applications STATCOM Improving the AC grid performance

Power System of the future DC grids [1]

DC grids [2] Paper 118: A closer look at protection concepts for DC systems

DC grids [3] Paper 119: Improving the DC fault response of H-bridge

DC grids [4] Paper A3-117: R&D of a Hybrid HVDC breaker

Converter design [1] TenneT uses two types of converters CTL type from ABB MMC half bridge from Siemens and GE Recent development in new configurations: Full bridge MMC Semi full bridge MMC Hybrid MMC Mainly to improve the transient behaviour during DC faults: DC fault current reduction

Diode rectifier Simple offshore design Lower cost Converter design [2]

FACTS and PE applications Paper 206: planning and comm. of a130 MVA STATCOM

General Paper 127: backbone structure change

Conclusions Various subjects that are within working area The Netherlands DC grid developments More and more introduced DC circuit breaker Converter design New switching schemes New requirements Power Electronics offer new possibilities for AC grid support

Cigré B5 Protection and Automation Terugkoppeling Parijs Johan Morren

Preferential subjects PS1: Protection Automation and Control System (PACS) Optimization and Life Time Asset Management PS2: Coordination of Generator and power system Protection

PS1 1. Lifecycle documentation and management 2. Optimization of data acquisition and PACS design 3. Optimization of PACS maintenance 4. Optimization of PACS from grid level view 5. Considerations to optimize dedicated protection issues

Lifecycle documentation and management Veel en vaak veranderingen Veel betrokken partijen Verschillende leveranciers Bugs Security Beveiliging versus SA

Lifecycle documentation and management

Lifecycle documentation and management CMS Automated detection of configuration changes Retrieval of data High investment

Rapport PDI

Optimization of data acquisition and PACS design

Optimization of data acquisition and PACS design Q1.04: What is the experience with the process bus by the users up to now?

Optimization of PACS maintenance

Optimization of PACS from grid level view Trigger for protection performance audit A periodic requirement of the company s lifetime protection asset management policy. A legal or statutory periodic requirement (at least in some countries). Changes to the primary network topology and/or addition or removal of plant and equipment. Addition of new types of protection which may impact on the coordination of existing protections. Uncertainty of actual in-service settings.

Optimization of PACS from grid level view

Considerations to optimize dedicated protection issues Vergaarbak van onderwerpen

Samenvatting Veel IEC61850 Meer vraagtekens Kritisch nadenken

PS2 1. Coordination of power plant protection and the power system protection 2. Transient stability studies and new protection suggestions 3. Requirements for distributed Energy Resources

Nieuwe werkgroepen 1. Methods for Specification of Functional Requirements of Protection, Automation and Control 2. PACS Asset Management 3. PACS with Hardware Independent Functionality 4. Life cycle testing of Synchrophasor based Systems used for Protection, Monitoring and Control 5. Impact of low Inertia network on protection and control

Operating Experience with and Future Challenges for Coordinating Power Plant and Power System Protection System conditions for and probability of Out-of-Phase Qikai Zhuang, Sean McGuinness, Giorgio Poggi Andreas Kubis, Mirko Palazzo, Konstantin Aprosin, Jean-Marc Willième

System instability: unbalance of active power (frequency) unbalance of reactive power (voltage) lack of transmission capacity (angle) System separation: splitting networks, splitting power plants Large disturbances out-of-phase = out-of-step Inconsistencies with protection and control (tripping, blocking, wide area protection, type testing for cascading effects) Inconsistencies in circuit breaker standards (HV and generator) Inconsistencies in grid-codes (no overall view, verification, ) Many visitors during poster sessions (B5, A3)

Cigre Take Away bijeenkomst 28 maart 2016 Study Committee C1, C2, C5 & C6

Cigre Take Away bijeenkomst 28 maart 2016 Study Committee C1

Key take-aways CIGRE 2016 Paris SC C1 System Development & Economics Alan Croes, TenneT

SC C1 Open session Preferential subjects 2016 PS1: making PS2: PS3: State of the art approaches and standardization in Asset Management decision 5 papers Interface and allocation issues in planning T&D networks with multi-party projects 6 papers New system solutions and planning techniques for flexible and robust system plans 23 papers Keynote addresses Planning criteria for future transmission networks in the presence of a greater variability of power exchange with distribution systems (John Wilson, UK) Interface & allocation issues in multi-party and/or cross-jurisdiction power infrastructures projects (Antonio Iliceto, Italy)

Keynote address 1/2 Planning criteria for future transmission networks in the presence of a greater variability of power exchange with distribution systems (John Wilson, UK) What type of incentive could be implemented to ensure the effective sharing of data between the TSO and DSO without introducing excessive regulation? Are there sufficient incentives in place to drive technological innovation by DSOs? To what extent do DSOs know what services their customers actually want? Are DSOs gearing up to handle big data? Will TSOs continue to dispatch RES connected to the DSO network to the same extent as today?

Keynote address 2/2 Interface & allocation issues in multi-party and/or cross-jurisdiction power infrastructures projects (Antonio Iliceto, Italy) If the drop in electricity wholesale prices continues, it will necessarily start to affect investment planning Large subsidies for RES are distorting markets and affecting system development planning Concern was voiced that the burden of paying for RES subsidies disproportionately affects SMEs (Small & Medium sized Enterprises)

PS1: AssetManagement Discussion focused on: Monetization of risk - how to value loss of life, reputation, etc - putting a value only when it s a common value for all parties - becoming industry standard, so you cannot not do it Use of drones when inspecting a fleet of assets - good experience in Japan and Ireland for objective, better and cheaper insights - bad experience in UK to obtain license to fly, same as for TenneT

PS2: planning T&D networks Discussion focused on: Uncertainty - uncertainties relating to size, timing and location of RES RES availability - even intermittent RES have a predictability Stakeholder engagement - stakeholder engagement is key to the successful delivery of infrastructure Market rules & Informing policy decisions - realize the political reality which drives the paradigm changes, right or wrong! - TSO/DSO s apolitical, but obligation to support informed political decisions - higher costs for ancillary services not accepted by regulators

PS3: system solutions and techniques Discussion focused on: Low inertia - concern on low inertia shared, but hope on Dublin and MIGRATE Delivery of quality - realize with offsite equipment instead of network enhancements; VIP treatment Organization - should planners and operators be split or together? More controlling equipment is being used - e.g. rotating transformer, STATCOM, VSC functionalities - AC and DC parallel lines operated with different filosophy Modelling - limitations discussed, both programs and skills of users

SC C1 Strategic plan, vision and focus Anticipate and plan a system that best fits the paradigm shift active WG:

Preferential subjects 2018 (draft) PS 1 : Expanding role of social factors and transparency in transmission investment decision approaches New elements in multi criteria evaluation New stakeholders in the decision making process Management of the scope of highly uncertain investments PS 2: Impact of changing external factors on asset management Political, economic, regulation, weather, cyber and physical security factors, etc. Within-company strategy on grid modernization, e.g. monitoring, Big Data, asset analytics, security Asset usage and longevity effects from highly variable/non-schedulable generation PS 3: Coordinated planning between grid operators across all voltage levels Methodologies for planning multiple interconnected transmission grids and for transmissiondistribution interaction How to share costs between different network utilities or adjust company organization and strategy The evolution of planning methods to account for smart grids, distributed generation, demand response

29 May 2 June C1, C2, C4, C5, C6, B2 cigredublin2017.net

Briefing SC C2 (System Operation and Control) Samuel Glismann (TenneT) in plaats van Danny Klaar (TenneT)

Preferential Subjects 2016 PS1: Grid operation solutions to changes in generation mix including distributed and renewable generating resources 25 papers, from 19 countries, and 13 questions generated 27 prepared contributions PS2: Managing System Disturbances and System Restoration 13 papers, from 11 countries, and 7 questions generated 12 prepared contributions

Trends: Hot topics in C2 RES integratie Afname conventionele opwek Afname van dynamische stabiliteit Tools voor dynamic security assessments Controllability en flexibility (e.g. nieuwe en aangepaste ancillary services) TSO-DSO samenwerking Opslag oplossingen Systeemherstel met RES

Tools voor dynamic security assessments (1) C2-116, Ierland: Tools for a Synchronous Power System with High Penetration of Non-conventional Sources Metrics: System Non-Synchronous Penetration (SNSP), Rate of Change of Frequency (RoCoF) and System Inertia New TSO Tools: Wind Dispatch Tool to have direct control in emergency EMS short circuit Tool Real-time Wind Security Assessment Tool for transient, voltage, frequency, and thermal security performing more than 1.5 million tests daily

Tools voor dynamic security assessments (2) C2-208, GB: Advances in Wide Area Monitoring and Control to address Emerging Requirements related to Inertia, Stability and Power Transfer in the GB Power System

Tools voor dynamic security assessments (3) C2-118, Italy: real-time Dynamic Security Assessment and automatic system devoted to special protection schemes Main features of DSA: Steady State N-1,, N-k Security Assessment Transient N-1,, N-k Security Assessment Voltage Stability Assessment (VSA evaluation of Voltage Collapse) Short Circuit Analyses Load Shedding performance Assessment Special Protection Schemes Assessment Distributed Generation Modelling Evaluation of the angle of reclosing after line tripping Statistics on stored simulation results

Opslag oplossingen C2-112: Primary control reserves provision with battery energy storage systems Opslag uitdaging: managen van state of charge (SoC) Regulatorisch vraagstuk belangrijk voor NL: energieeis 15 of 30 minuten full-load

Opslag oplossingen & flexibility C2-109, NL: Fly-wheel service for deterministic frequency deviations from XB exchanges

TSO-DSO samenwerking C2-207, DE: DSO-TSO: permissible range of operation points (ROP)

Systeemherstel C2-201: Blackstart test with 640 MW generator in South Africa

Let s keep the system running! Bedankt.

William Hartman, 28st September 2016 TenneT TSO B.V., The Netherlands

Sunday 21st August 2016 Official opening ceremony at Palais de Congres. C3 welcome drinks and diner at restaurant Les Ombres organized by RTE France Olivier Grabette and Agnes Labbaye. Spectacular view at the Eiffel Tower, French cuisine and wine and a warm welcome by chairman Henk Sanders.

Monday 22st August 2016 Strategic Advisory Group First meeting of this (new) SAG. Discussed and decisions made about: Preferential subjects 2018 Launching new working groups Starting to deliver tutorials with all our technical brochures Writing Cigré's position paper about sustainability General assembly of CIGRE Members Technical exhibition

Tuesday 23 st August 2016 Group discussion meeting PS1: Environmental liabilities of transmission and distribution assets C3-101 Geomagnetic disturbance - Austria C3-102 Bird electrocutions South Africa C3-103 Authorization procedures for energy storage - Italy C3-104 Soil investigation substations - Belgium

Tuesday 23 st August 2016 PS2: Overhead lines and underground cables: acceptability issues C3-201 Evaluation method for values derived from substation instalment - Japan C3-202 EMF Mitigation and Stakeholder Engagement - Australia C3-204 3D multi-viewpoints environment to analyze the visual impact of overhead lines -Spain C3-210 Environmental Impact and Prevention analysis for urban Substations - China C3-203 HV Underground Cables Magnetic Field Mitigation Measures - Argentina C3-207 HMCPL shielding system in renewing the underground HV power lines in big cities - Italy C3-303 Dealing with visual impact of existing high voltage transmission lines - UK C3-205 Analysis Electromotive Force in Phase Conductors Australia C3-209 Life cycle assessment of the UGC transmission system - Iceland

Tuesday 23 st August 2016 PS3: Climate change: implications for electric power systems C3-304 Reduction of greenhouse gases in GIS pilot project - UK C3-301 Hydropower plants and the Climate Change - Brazil C3-302 Power Systems, pollution and foggy weather - India C3-305 Climate Change impact on Electrical Power System - Jordan

Wednesday 24 st August 2016 Poster Sessions The poster session is the only way to present your paper, and author as well as visitor can have a one-onone conversation with no time limits. It worked very satisfying. Hollandse avond Netwerkborrel, diner en cabaret in Pavillon le Dauphine. Met dank Jifke van Popering voor de perfecte organisatie.

Thursday 25 st August 2016 Study committee meeting Presentations JWG (Joint Working Groups) Epidemiological evidence HVTL and childhood leukemia TBD: Group 2B possible > Group 4 probably not Draft program Korea, 15 th -19 th October 2017 Subjects new papers 2018 Monitoring return of investments environmental mitigation Visual impact power lines Environmental impact stranded assets Sustainable supply chain management Energy storage Cocktail reception at Cite de la Mode et du Design

Friday 26 st August 2016 Joint Working Groups C3.16 Grid and Wildlife C3.15 Public acceptance of substations

Wednesday 28 st September 2016 Key Take Aways Paris 2016 The electrical power system of the future Making the best use of the existing system Focus on the environment and sustainability Preparation of material readable for non technical audience stakeholder engagement public acceptance substations impact on ecology bird electrocution wildlife climate change preventive measures and mitigation g3 gas protection geomagnetic disturbances energy storage systems visual impact 3D multi-viewpoints KMS life cycle assesments Korea 2017 epidemiological evidence childhood leukemia possible > probably not asset management and environment environmental impact underground cables magnetic field mitigation measures reduction of greenhouse gases SF6 gas

C4: Power System Performance Anton Ishchenko (Phase to Phase) Jeroen van Waes (Movares)

Onderwerpen Power Quality EMC/EMI Insulation Coordination / Lightning Advanced Tools for the analysis of power system performance Power systems dynamic performance models and analysis Ca. 25 internationale C4 werkgroepen met 15 NL deelnemers

Study Committee C4

Leden NSC C4 Ton Almering (Philips) Maarten Berende (Enexis, secr.) Helko (H.E.) van den Brom (VSL) Sjef Cobben (Alliander, TU/e) Chris Engelbrecht (Engelbrecht Consulting) Frans van Erp (TenneT) Anton Ishchenko (Phase to Phase) Patrick Marteijn (Dow) Tim Minkes (Movares) Peter van Oirsouw (Alliander) Frans Provoost (Alliander) Gert Rietveld (VSL) Imre Tannemaat (TenneT) Konstantinos Velitsikakis (DNV GL) Jeroen van Waes (Movares, Vz)

Evaluatie C4 Overzicht Totaal: 37 papers Goed: 23 (62%) Relevant voor NL: 22 (59%) Zeer bruikbaar: 12 (32%) Veel voor NL relevant, lees Special Report In deze presentatie enkele karakteristieke papers.

PS1: Impact of inverter based generation and Energy Storage

Inpassing van lange HVAC kabels (Modellering en planning en aanverwante onderwerpen) PQ metingen en simulaties Inpassing van storage PS1 gaat over

C4-103: Utility Connected Smart Inverters Lessons Learned from Demonstration of Open Standards and Protocols 3 test PV installaties in VS (200 kw, 2x300 kw en 2x500 kw smart inverters) middenspanning distributienet (4.8 kv en 13.2 kv niveaus) inverters worden op afstand geregeld via communicatieprotocol DNP3 het doel is om te testen of de inverters naar behoren functioneren (testperiode: enkele maanden) de volgende functies zijn getest:

C4-103: Utility Connected Smart Inverters Lessons Learned from Demonstration of Open Standards and Protocols Remote Connect/Disconnect Power Curtailment PF/Q Control Volt-Var/Volt-Watt Control Dynamic Reactive Current Low/High Voltage Ride- Through inverter op commando aan-/uitschakelen opgewekt actiefvermogen beperken arbeidsfactor-/blindvermogenregeling aanpassing van Q en/of P aan de hand van de gemeten spanning kortstondig meer blindvermogen (bv. tijdens een spanningsdip) blijf aan het net gekoppeld tijdens te lage/te hoge spanningen Conclusie: het principe werkt goed, maar de communicatie faalt relatief vaak

C4-114: Investigation of Harmonics Trends on Irish Transmission System by analysing PQ Measurements and SCADA Records PQ metingen over 5 jaar (50 stations; 110, 220, 275, 400 kv; 70 PMUs en Disturbance Recorders) focus op correlaties harmonic distortion en systeem variabelen data analyse: trends, oorzaken voorbeelden harmonischen THD groeit aanzienlijk door converter-gekoppelde windenergie en HVAC kabels, maar blijft onder 3% (= Planning Level THD) Conclusie: Veel variabelen hebben invloed, 1-week meetperiode (IEC 61000-3-6) is te kort.

C4-108: Power Quality Monitoring and Assessment in the Spanish Transmission System This paper highlights the importance of monitoring Power Quality (PQ) at transmission level due to the increased penetration of Power Electronic devices. centralised PQ Monitoring prototype with multiple functionality including: (i) PQ monitoring equipment, (ii) centralised PQ database, (iii) built-in data analyser, (iv) automatic reporting and (v) PQ state estimator In NL ook uitgebreid meetprogramma en jaarlijkse rapportage, zie ook www.uwspanningskwaliteit.nl

PS2: Challenges with modelling and evaluation of lightning performance and insulation coordination in the power system of the future

PS2 gaat over Bliksemverschijnselen en modellering Transiente overspanningen (1x NL spont. contr. Konstantinos Velitsikakis, DNV GL)

C4-208: Investigating the Methodology and Implications of Implementing Long HVAC Cables in Ireland Power System resonanties door aanleg van lange HVAC kabels verschillende opties, scenario s en aspecten zijn geanalyseerd loadflow, blindvermogenscompensatie, resonantie de nadruk ligt op transiënte overspanningen (incl. EMTP model) Conclusies: 1. 30 km kabel op 220 kv is mogelijk 2. Magnetische kern en verzadingskarakteristieken (trafo s, reactoren) zijn van

WG C4-23: GUIDE TO PROCEDURES FOR ESTIMATING THE LIGHTNING PERFORMANCE OF TRANSMISSION LINES Er is ook 1 werkgroep onder NL leiding actief: Chris Engelbrecht & Imre Tannemaat update CIGRE brochure 63 (1991) meer gedetailleerde & geupdate formules ervaringen lightning detection networks voorbeelden & benchmarks

PS3: Bridging the gap between EMT, FEM and positive sequence grid simulation

PS3 gaat over Welk model pas je wanneer toe (beperkingen van modelleringstechnieken) Netmodelvalidatie en netmodelbeheer

C4-305: AC grids and HVDC systems modeling coherency between EMT and phasor domain tools RTE (Frankrijk) gebruikt verschillende programma s voor verschillende studies (loadflow, transiënte stabiliteit, elektromagnetische transiënten, real-time hardware in the loop simulaties) Hoe moeten SVC s en HVDC s gemodelleerd worden? Hoe worden de gegevens tussen programma s uitgewisseld? data uitwisseling: Common Grid Model Exchange Standard (ENTSO-E) modellering: regelaars (echt) aan converters en net (model) gekoppeld

Zie ook evaluatie C4

Key take-aways CIGRE 2016 Paris C6 Session Distribution Systems and Dispersed Generation Irina Melnik (Alliander)

Scope of SC C6 Dispersed Energy Resources connection and integration DER concepts in distribution systems operation and planning Demand management and active customer integration Rural electrification

Preferential Subjects SC C6 Three preferential subjects were discussed in Session 2016: PS1: Integrated planning and operation for upgrading distribution networks PS2: Energy infrastructure for urban networks PS3: Microgrids and off-grid hybrid systems

Hot Topic: Need for a new planning methodology High penetration of low carbon technologies Network issues Tackled in the traditional way - Costly assets - Underutilised assets - Inability to meet renewable targets Key drivers for Active distribution network: Environmental and regulatory pressure Market liberalization and overall efficiency Security of supply + increase quality of service Copper investments postponement

Hot Topic: Need for a new planning methodology DSO s still adopt traditional planning tools Traditional planning is not suited for smart distribution New planning methodologies are required Operation in planning Include flexibility in planning Data Modelling Risk and reliability analysis Cyber-physical simulation of ICT and Power Systems Consequence s for planning at TSO s? How innovative are we with planning methodologies?

Hot topic: Multi-energy systems (MES) including heat, cooling, gas, water, and transport In Multi-energy systems different sectors and networks such as electricity, heat, cooling, fuels, transport, water, and so on, optimally interact with each other. MES thinking: Unlock technical, economic and environmental value hidden when considering classical energy systems, treated separately or independently Enable access to new forms of flexibility from various sectors to guarantee a secure and affordable delivery of clean energy. MES are particularly relevant in urban areas with the potential to develop Smart Communities and Smart Cities. Do we use advantages of MES?

Hot topic: Multi-energy systems (MES) including heat, cooling, gas, water, and transport MES: Could change load curves significantly for distribution networks; May affect power quality, including voltage fluctuation and voltage deviation caused by rapid load changes. Control technologies are needed to meet these challenges. Do we possess such technologies?

Hot topic: protection of grids with large amount of DG How will dispersed generation typically affect network performance indexes such as SAIDI, SAIFI, LOEE? What measures will need to be considered to prevent network performance from degrading? One of possible solutions: Self-healing protection system consists of four steps: substation restoration, priority feeder restoration, feeder capacity change, distribution system reconfiguration. Which other solutions do we see/use?

Hot topic: Microgrids Opening Panel. Microgrids as contributors to energy security and system stability WG SC C6 'Microgrid Evolution Roadmap. First Technical brochure Definition of Microgrid. Two fundamental requirements: the microgrid contains sources and sinks under local control; can operate either grid-connected or islanded Two key types of microgrids should be distinguished : Customer microgrids or true microgrids (μgrids) are selfgoverned entities, usually downstream of a single point of common coupling. Utility or community microgrids involve a segment of the legacy regulated grid, and are called milligrids (mgrids). While not necessarily technically different from μgrids, they are fundamentally different from μgrids from a regulatory and business model perspective because they incorporate traditional regulated utility infrastructure.

Hot topic: Microgrids Some of the key microgrid technology enablers: Distributed energy resources plus load control. Distributed energy storage (DES) allows: to manage intermittent and renewable energy generation, To serve load during islanded operation. Microgrid controls and supervisory systems: to manage real time power balancing to determine power exchange requirements with the megagrid during gridconnected operation Microgrid protection and automation: to ensure safe, sound, and autonomous operation of the microgrid internal assets, to fast detection and isolation faults. How do we see the future for Microgrids?

SIGRE Session 2018 - Preferential Subjects SC C6 PS 1 : Exploiting flexibility in strategic distribution planning and operation Managing resilience and congestion using distributed energy resources Implementing demand response, customer empowerment and markets Distributed resources asset management PS 2: Energy storage in distribution systems Deploying and managing energy storage (electrical, thermal etc.) Exploiting transportation electrification Multi-energy system and load interaction for energy efficiency PS 3: Intelligent electrification for all Electric energy systems for smart cities Grid-connected microgrids Off grid electrical systems for remote and rural deployment

Appendix

PS1 Integrated planning and operation for up grading distribution networks Subtopic 1 - Impact of distribution generation (papers C6-101, C6-102, C6-103, C6-104) Subtopic 2 - Protection and reliability in distribution network grids (papers C6-105, C6-106, C6-107, C6-108, C6-109) Subtopic 3 - State estimation in distribution grids (papers C6-110, C6-111, C6-112) Subtopic 4 - Surveys of distribution grid performance as background for future recommendations (papers C6-113, C6-114, C6-115 and C6-116) Subtopic 5 - Control issues in the distribution network including demand integration (papers C6-117, C6-118, C6-119)

PS2 Energy infrastructure for urban networks Subtopic 1 - Smart Cities (papers C6-202, C6-203, and C6-204) Subtopic 2 - Multi-energy systems including heat, cooling, gas, water, transport (papers C6-201, C6-208, and C6-210) Subtopic 3 - Impact of developments in energy technology, IT, big data, and further trends on the distribution system (papers C6-205, C6-206, and C6-209)

PS 3 Microgrids and off-grid hybrid systems Subtopic 1 Voltage control and automation of active networks (papers C6-305, C6-306, C6-308) Subtopic 2 Flexibility and enabling technologies for active networks and microgrids (papers C6-302, C6-303, C6-307, C6-310) Subtopic 3 Planning of and business cases for future networks (papers C6-301, C6-304, C6-309)

Hot Topic: Need for a new planning methodology ADN Operations Bi-directional power Adv. controls DER variations Self Healing Customer participation Islanding Energy storage Characteristics System states Variability Peak worst-case Assessment Stochastic Simulation

WG 'Microgrid Evolution Roadmap' First findings of the WG 'Microgrid Evolution Roadmap'

1. Definition and Clarification of Microgrid Concept Definition of Microgrid. Two fundamental requirements: the microgrid contains sources and sinks under local control; can operate either grid-connected or islanded Microgrids are electricity distribution systems containing loads and distributed energy resources, (such as distributed generators, storage devices, or controllable loads) that can be operated in a controlled, coordinated way either while connected to the main power network or while islanded. Two key types of microgrids should be distinguished : Customer microgrids or true microgrids (μgrids) are selfgoverned entities, usually downstream of a single point of common coupling. Utility or community microgrids involve a segment of the legacy regulated grid, and are called milligrids (mgrids). While not necessarily technically different from μgrids, they are fundamentally different from μgrids from a regulatory and business model perspective because they incorporate traditional regulated utility infrastructure.

2. How can a Microgrid become profitable? Who owns and/or operates it? Microgrid Stakeholders with a direct financial interest are: the microgrid owner or operator, the distribution network operator, participants in the microgrid, those who may be directly affected by the existence of microgrids, etc. Ownership models: ownership by the distribution network operator (DNO), ownership by a current customer or consortium of customers, independent ownership. In each case, the microgrid would tend to operate so as to maximise the benefit of the owning stakeholder.

3. Some of the key microgrid technology enablers Distributed energy resources (DER): generation, energy conversion and storage, plus load control. Distributed energy storage (DES) allows: the management of intermittent and renewable energy generation, serving load during islanded operation. Microgrid controls and supervisory systems: to manage real time power balancing to determine power exchange requirements with the megagrid during gridconnected operation Microgrid protection and automation: to ensure safe, sound, and autonomous operation of the microgrid internal assets, to fast detection and isolation faults.

Drivers 4. Why are Microgrid needed? Benefits of Microgrid Exploiting the full benefits of integration of large numbers of small-scale DER Resilience has been a dominant concern in the northeastern U.S. and Japan, following those areas' recent natural disasters. Off grid electrical systems for remote and rural deployment Advantages to customers and utilities: improved energy efficiency, minimisation of overall energy consumption, reduced environmental impact, improvement of reliability of supply, network operational benefits such as loss reduction, congestion relief, voltage control, security of supply, and more cost-efficient electricity infrastructure replacement.

5. Advantages of wide deployment of Microgrids Cost-benefit analysis requires all impacts be classified into two categories: known impacts, which must be known a priori and discovered impacts, which must be found through simulation or calculation. Direct Benefits The direct beneficial technical and economic impacts classified as improved efficiency, reduced emissions, and improved power quality and reliability. Economic benefits can be obtained through the participation of microgrid loads and sources as one co-operating entity. Indirect Benefits Difficult to quantify. They include environmental benefits such as a reduction in emissions of greenhouse gasses and other pollutants, reduction of the physical footprint required for power generation, reduction of reliance on external fuel sources and prices, and the creation of employment.

Conclusions Necessary equipment and methods needed to deploy a Microgrid: establishment of a business case, assembling and configuring of available technology for controlling local generation and loads, development of a mutually beneficial interaction with the wider legacy electric power system (or megagrid), from both the operations and market perspectives under the prevailing regulatory environment.

Cigre Take Away bijeenkomst 28 maart 2016 Study Committee D1

Doel: Cigré Study Committee D1 Materials and Emerging Test Techniques faciliteer en bevorder de voortgang van engineering en de internationale uitwisseling van informatie en kennis op het gebied van materialen en opkomende testtechnieken Dit omvat de opvolging en evaluatie van nieuwe ontwikkelingen binnen: Nieuwe en bestaande materialen voor elektrotechnologie Diagnostische technieken en gerelateerde kennisregels Opkomende testtechnieken die naar verwachting een significante impact op energiesystemen kunnen hebben op de middellange en lange termijn.

Scope van SC D1 Studiecomité D1 is deels wetenschappelijk van karakter Het belangrijkste doel is andere Studiecomités tijdig te voorzien van informatie over nieuwe ontwikkelingen en trends. Met zijn werk streeft SC D1 ernaar CIGRÉ volledig bewust te houden van de evolutie van relevante materialen en technologieën binnen zijn activiteiten. Studiecomité SC D1 Materialen en opkomende testtechnieken Een zogenaamd horizontaal studiecomité: werk relevant voor meerdere werkgebieden Veel gelegenheden voor samenwerking met andere studiecomités Nederlands Studiecomité D1 zoekt secretaris en geïnteresseerden

Bestaande groepen WG D1.44 Testing of naturally polluted insulators WG D1.48 Properties of insulating materials under VLF voltages WG D1.50 Atmospheric and altitude correction factors of air gaps and clean insulators WG D1.51 Dielectric performance of eco-friendly gas insulated systems WG D1.52 Moisture measurement in insulating fluids and transformer insulation An evaluation of solid state sensors and chemical methods WG D1.53 Ageing of upgraded cellulose and cellulose impregnated in ester liquids and other liquids (Revision of TB 323) WG D1.54 Basic principles and practical methods to measure the AC and DC resistance of conductors of power cables and overhead lines (NL Ariaens)

Bestaande groepen WG D1.56 Field grading in electrical insulation systems WG D1.58 Evaluation of dynamic hydrophobicity of polymeric insulating materials under AC and DC voltage stress WG D1.59 Methods for dielectric characterisation of polymeric insulating materials for outdoor applications WG D1.60 Traceable measurement techniques for very fast transients WG D1.61 Optical corona detection and measurement (NL Ariaens) WG D1.62 Surface degradation of polymeric insulating materials for outdoor applications WG D1.63 Partial discharge detection under DC stress WG D1.64 Electrical insulation systems at cryogenic temperatures (NL Ross)

Bestaande groepen WG D1.65 Mechanical properties of insulating materials and insulated conductors for oil insulated power transformers JWG D1/A2.47 New frontiers of DGA interpretation for transformers and their accessories JWG D1/B1.49 Harmonized test for the measurement of residual inflammable gases JWG D1/B3.57 Dielectric testing of gas-insulated HVDC systems JWG A2/D1.46 Field experience with transformer solid insulating ageing markers JWG A2/D1.51 Improvement to Partial Discharge Measurements for Factory and Site Acceptance Tests of Power Transformers

WG D1.66 Requirements for partial discharge monitoring systems for gas insulated systems WG D1.67 Dielectric performance of new non-sf6 gases and gas mixtures for gas-insulated systems Voorgesteld: Nieuwe werkgroepen Natural and synthetic esters Evaluation of the performance under fire and the impact on environment Artificial pollution test of polymeric insulators; te starten zodra WG D1.44 zijn werk voltooid heeft Test techniques for HTS materials and electrical insulation systems; samen te werken met de recent gestarte groep WG D1.64

1. Compact Insulation Systems (AC and DC) 1. High field strength phenomena 2. Field grading 3. Ageing and long term performance 2. New Materials 1. Nanocomposites 2. Eco-friendly materials Preferential subjects 3. Non-standardized Stresses and Emerging Test Techniques 1. Offshore and subsea application (high pressure, corrosion, etc.) 2. Advanced diagnostic techniques 3. Impact of non-standardized stresses on materials

Papers PS 1 - Compact Insulation Systems 13 papers: D1-101, D1-103, D1-108: dielectric performance of compact gas insulated systems (GIS) at AC and DC voltage M.n. D1-101 zeer goede kwaliteit; alle bruikbaar en goed leesbaar D1-104, D1-105, D1-106: materials for insulation of HVDC cables Beide van goede kwaliteit, bruikbaar en goed leesbaar. D1-106 langeduur testen D1-109 t/m D1-113: outdoor insulation (test, selection, performance); D1-109 - D1-112 goede kwaliteit, D1-113 gemiddeld D1-107 ZnO microvaristor based stress grading varnish and tape for stator windings of large electrical machines goede kwaliteit en goed leesbaar