IEC TC 14 ACTIVITIES FOR THE DISTRIBUTION AREA WITH IEC
23rd International Conference on Electricity DistributionLyon, 15-18 June 2015Paper 0424IEC TC 14 ACTIVITIES FOR THE DISTRIBUTION AREA WITH IEC ACTADYukiyasu SHIRASAKAHitachi Ltd., – Japanyukiyasu.shirasaka.xt@hitachi.comABSTRACTIn the IEC, the Advisory Committee on ElectricityTransmission and Distribution, ACTAD, consists of thechairman, 7 regional experts and 11 representativesfrom Technical Committees (TC) and Sub Committees(SC) dealing with individual T&D technologies. In thesecommittees, international experts identify the emergingtechnologies, discuss the issues and develop IECstandards in order to meet the market demands. In theACTAD, the representatives from committees deal withthe coordination issues between TC/SCs to efficiently andeffectively implement standardization activities in the IEC.This paper takes IEC/TC 14 as an example of thosecommittees, and briefly summarizes their standardizationactivities in light of the distribution area.needs;- to give feedback to their own TC/SC to efficientlysolve the coordination issues among TC/SC;- to contribute to the development of ACTADdeliverables such as the future T&D map and guide111, “Electrical high-voltage equipment in highvoltage substations - Common recommendations forproduct standards”.Table 1. TC/SC representatives in ACTADINTRODUCTIONIn the ACTAD (former Sector Board 1), from itsestablishment, the representatives from 11 (please seeTable 1) committees contribute to sharing and solving theissues with regards to the transmission and distributionarea. Based on the restructuring recommendation by theStandardization Management Board (SMB) in May 2010,the Sector Board 1, which had provided market-drivenpriorities for work of the IEC and was composed ofindustry members, discussed its new transformedstructure and identified the TC/SCs to be invited as themembers of ACTAD. After October 2011 when the SMBapproved the ACTAD's terms of reference, deliverablesand work programme, all the TC/SC officers concernedwith the work of ACTAD were asked to nominaterepresentatives. In June 2012, the SMB approved theACTAD 11 representatives from Technical Committees(TC) and Sub Committees (SC) dealing with individualT&D technologies as shown in the Table 1.In the ACTAD, the regional experts and TC/SCrepresentatives from different technical areas gatherevery 6 months and discuss the issues with regard to thestandardization of T&D technologies. The responsibilityof ACTAD members include:- to identify standardization issues which concern, ormay potentially concern, more than one TC/SC intaking into account both technology trends and marketCIRED 2015Fig. 1. Photo from 2nd ACTAD meeting in SingaporeTitle of the Technical Committee 14 is “PowerTransformers”. TC 14 covers the whole technical area ofthe Power Transformers which have power ratings above1 kVA single phase and 5 kVA polyphase with a highervoltage winding of 1000 V or more. The powertransformers are key components in the power network.This paper describes the activities for the distribution areaof the TC14.1/5
23rd International Conference on Electricity DistributionLyon, 15-18 June 2015Paper 0424ACTIVITIES OF TC 14TC 14 ScopeThe scope of TC 14 is shown below.Standardization in the field of power transformers, tapchangers and reactors for use in power generation,transmission and distribution.Generally these transformers have power ratings above 1kVA single phase and 5 kVA polyphase with a highervoltage winding of 1000 V or more, however the scopeincludes lower voltage transformers and regulators usedin power delivery applications.Excluded:- Instrument transformers- Testing transformers- Traction transformers mounted on rolling stock- Welding transformers- Transformers for applications covered by TC 96.The scope of IEC TC 14 is including widely of voltage,capacity, etc. for industry, distribution and transmissionarea.Existing Standards of TC 14TC 14 has the following publications (26, based on theend of year 2014). We call these publications as “76series” of the standards group for the power transformers.IEC 60076-1 Edition 3.0 (2011-04-20)Power transformers - Part 1: GeneralIEC 60076-2 Edition 3.0 (2011-02-23)Power transformers - Part 2: Temperature rise for liquidimmersed transformersIEC 60076-3 Edition 3.0 (2013-07-31) *Power transformers - Part 3: Insulation levels, dielectrictests and external clearances in airIEC 60076-4 Edition 1.0 (2002-06-06) **Power transformers - Part 4: Guide to the lightningimpulse and switching impulse testing - Powertransformers and reactorsIEC 60076-5 Edition 3.0 (2006-02-07)Power transformers - Part 5: Ability to withstand shortcircuitIEC 60076-6 Edition 1.0 (2007-12-13)Power transformers - Part 6: ReactorsIEC 60076-7 Edition 1.0 (2005-12-15) **Power transformers - Part 7: Loading guide for oilimmersed power transformersCIRED 2015IEC 60076-8 Edition 1.0 (1997-10-01)Power transformers - Part 8: Application guideIEC 60076-10 Edition 1.0 (2001-05-22) **Power transformers - Part 10: Determination of soundlevelsIEC 60076-10-1 Edition 1.0 (2005-10-17) **Power transformers - Part 10-1: Determination of soundlevels - Application guideIEC 60076-11 Edition 1.0 (2004-05-27) **Power transformers - Part 11: Dry-type transformersIEC 60076-12 Edition 1.0 (2008-11-05)Power transformers - Part 12: Loading guide for drytype power transformersIEC 60076-13 Edition 1.0 (2006-05-24)Power transformers - Part 13: Self-protected liquidfilled transformersIEC 60076-14 Edition 1.0 (2013-09-16) *Power transformers - Part 14: Liquid-immersed powertransformers using high-temperature insulation materialsIEC 60076-15 Edition 1.0 (2008-02-27) **Power transformers - Part 15: Gas-filled powertransformersIEC 60076-16 Edition 1.0 (2011-08-25) **Power transformers - Part 16: Transformers for windturbine applicationsIEC 60076-18 Edition 1.0 (2012-07-09) *Power transformers - Part 18: Measurement offrequency responseIEC/TS 60076-19 Edition 1.0 (2013-03-22) *Power transformers - Part 19: Rules for thedetermination of uncertainties in the measurement oflosses in power transformers and reactorsIEC 60076-21 Edition 1.0 (2011-12-15) * **Power transformers - Part 21: Standard requirements,terminology, and test code for step-voltage regulatorsIEC 60214-1 Edition 2.0 (2014-05-22) *Tap-changers - Part 1: Performance requirements andtest methodsIEC 60214-2 Edition 1.0 (2004-10-14) **Tap-changers - Part 2: Application guideIEC/TR 60616 Edition 1.0 (1978-01-01)Terminal and tapping markings for power transformersIEC 61378-1 Edition 2.0 (2011-07-26)Converter transformers - Part 1: Transformers forindustrial applicationsIEC 61378-2 Edition 1.0 (2001-02-08) **Convertor transformers - Part 2: Transformers forHVDC applicationsIEC 61378-3 Edition 1.0 (2006-04-27) **Converter transformers - Part 3: Application guideIEC 62032 Edition 2.0 (2012-06-21) *Guide for the Application, Specification and Testing ofPhase-Shifting Transformers* Published within the last 3 years (7)** Under the maintenance work to the new edition (11)2/5
23rd International Conference on Electricity DistributionLyon, 15-18 June 2015Paper 0424Table 3. Projects for the new standardsRecent Activities in TC 14(1) Plenary meetingTC 14 held the plenary meeting in every year and thelast plenary meeting was held in Tokyo, JAPAN on 10thand 11th November, 2014 in conjunction with the IECGeneral Meeting 2014 Tokyo.In the plenary meeting, it was discussed on the progressfor the every projects included developing the newstandards, maintenance of the existing standards, itschedules, etc., the review and revising of the SBP(Strategic Business Plan), new business, etc.It was also informed the activities, main topics, etc. of therelated TC’s, AC’s, etc. from the liaison memberNo.12345Project ReferenceIEC 60076-20 Ed. 1.0Power transformers - Part 20:Energy efficiencyIEC 60076-57-1202 Ed.1.0Dual Logo IEEE/IEC standardfor "Liquid Immersed PhaseShifting Transformers"IEC 60076-22-1 Ed. 1.0Power transformer and reactorfittings - Protective devicesIEC 60076-22-2 Ed. 1.0Power transformer and reactorcooling equipmentIEC 60076-22-3 Ed. 1.0Power transformer and reactorfittings - Accessories and fittingsCurrentStageWorkingGroupFcst. Publ.Date1CDPT 60076-202014-06ANWPT WG322017-05(2) Maintenance of existing standardsTC 14 has 11 projects of the maintenance works for theexisting publications. Please refer to the Table 2.Now, 11 standards by 26 publications are under themaintenance work, and it is meaning that TC 14 is a veryactive TC in the IEC. These activities have big relation tothe area of CIRED like as IEC 60076-11 for the “Dry-type(4) Next new projectsTC 14 has a plan to develop a new standard or tomodify the existing standards as shown below.(a) IEC 60076-5 will be considered to start themodification of the standard in the near future.transformers”, IEC 60076-16 for the “Transformers for windturbine applications”.Typical Topics in TC 14Table 2. Projects for maintenance work(1) Energy efficiencyNo.Project ReferenceCurrentStageWorkingGroupFcst.Publ.1IEC 60076-4 Ed. 2.0(New)MT 60076-4-2IEC 60076-7 Ed. 2.0(New)MT 60076-7-3IEC 60076-10 Ed. 2.0ADISMT 60076-102016-014IEC 60076-10-1 Ed.2.0CCDVMT 60076-102015-125IEC 60076-11 Ed. 2.0(New)MT 60076-11-6IEC 60076-15 Ed. 2.0DECMT 60076-152015-077IEC 60076-16 Ed. 2.0AMWMT 60076-162017-058IEC 60076-21 Ed. 2.0AMWMT 60076-212018-029IEC 60214-2 Ed. 2.0AMWMT 602142016-0910IEC 61378-2 Ed. 2.0AMWMT 61378-22017-0911IEC 61378-3 Ed. 2.0CDISMT 61378-32015-02(3) Developing of the new standardsTC 14 has 5 projects for developing of the newstandards. Please refer to the table 3.Now, 5 new standards are under the developing work, andit is also meaning that TC 14 is a very active TC in theIEC. These activities have also big relation to the area ofCIRED like as IEC 60076-20 for the “Energy efficiency”and others too.CIRED 2015TC 14 set up the new project team IEC TC 14/PT 6007620 on 2011 to develop a new standards of the “EnergyEfficiency” as the IEC 60076-20 Edition 1.0 “Powertransformers - Part 20: Energy efficiency”.At first, this project was started as focusing to thedistribution area. After that, it was set up the new projectteam as focusing to the transmission area. Finally, thesetwo project teams were merged to develop a newpublication for the “Energy efficiency” covering the botharea of the distribution and transmission, also includingthe power stations.IEC TC 14/PT 60076-20 published the 1st CD documentas 14/778/CD dated on 2013-12-20 and the PT is nowworking to make a revised WD for a 2nd CD document topublish near future. Already, the project team of the PT60076-20 held the three times of the internationalmeetings after received the national comments from theevery member country to the 1st CD document of14/778/CD.In the 1st CD document of the 14/778/CD, it is indicatedthe calculation methods of the efficiency and efficiencyindex, and also described the energy performance level ofthe power transformers as “Efficiency” or “Losses”.3/5
23rd International Conference on Electricity DistributionLyon, 15-18 June 2015Paper 0424In the document, there are two calculation methods of theefficiency in accordance with historical reason as theMethod A and Method B as shown below,TfIs the temperature correction factor used tocorrect the losses from the standardreferencetemperature to the reference temperature usedfor calculation of EIMethod AEfficiency P - LossesPFollowing these idea, it is indicated the example of theenergy performance level of the power transformers as“efficiency” or “losses”.Efficiency PP Losses-Minimum Peak Efficiency Index method A for the liquidimmersed transformersPlease refer to the Table 4 for the liquid immersedtransformers with Um 36 kV and Sr 3150kVA.Method B-Efficiency Index, EIA , general formula of the method AEIA kSr - (P0Pc0k²PkPck (k))kSr(pu)Where:P0is the no-load loss measured at rated voltage,rated frequency and on rated tapPc0is the electrical power required by the coolingsystem for no-load operationPkis the measured load loss at rated current andrated frequency on the rated tap corrected to referencetemperature according to IEC 60076-1.Pck(k) is the additional electrical power required (inaddition of Pc0) by the cooling system for operationat ,load factor k.Sris the rated power of the transformer orautotransformer as defined in IEC60076-1 on which Pk isbasedkis the load factorThis approach respects the philosophy of IEC60076which refers the rated power to the rated voltage andcurrent of one of the transformer windings.The reference temperature at rated power chosen for thelosses shall be in accordance with IEC60076-1-Efficiency Index, EIB , general formula of the method AThis formula is only applicable to transformers withnatural cooling AN,ONAN,KNAN,GNAN and LNANThe general way to calculate the efficiency index is givenby equation 7. This is different from usual practice ofIEC. This method is named Method BEIB kSukSu P0 k²Tf Pk(pu)Where:P0is the no-load loss measured at rated voltage,rated frequency and on rated tapPkis the measured load loss at rated current andrated frequency on the rated tap corrected to referencetemperature according to IEC 60076-1.Suis the rated power of the transformer orautotransformer as defined in IEEE C57.12.80 on whichPk is based. Su is used to distinguish from Sr.kis the load factorCIRED 2015Table 4. PEI values for liquid Immersed transformers with Um 36kV and Sr 3150kVA-Um 24kVUm 36KvRatedPowerkVAPEILevel 1%PEILevel 2%PEILevel 1%PEILevel 2% 4299,514315099,50699,57299,44599,518Table 4 indicate the energy performance level for twowinding transformers as shown below,- With Um 36kV,- Sr 3150kVA,- With a second winding voltage 1.1kV,- with an deenergised tapping range 5%,This IEC 60076-20 will also included the level depend onthe method of A or B, frequency like as 50Hz or 60Hz,Dry type transformers, etc. with consideration of theEuropean practice, American practice, and othersThe project team of PT 60076-20 will publish the nextdocument as a 2nd CD in near future. Author willintroduce this new publication in the conference.4/5
23rd International Conference on Electricity DistributionLyon, 15-18 June 2015Paper 0424And, this standard would support to improve and tobottom up loss level and energy efficiency of the powertransformers. It also would contributed to create a lesscarbon society.(2) Joint Work with IEEERecently, it is increasing the joint works under thecooperation with IEEE PES / Transformer Committee todevelop or to revise new publications like as IEC 6007657-1202, IEC 60076-16, IEC 60076-21 and IEC 61378-2.(2) The latest publicationIEC 60076-3 Edition 3.0 (2013-07-31) “Powertransformers - Part 3: Insulation levels, dielectric testsand external clearances in air” is a latest publication inthe TC 14. This standard was modified by themaintenance team of MT60076-3 (Convenor : YukiyasuShirasaka, JP) spending about 4 years. This project wasstarted on November 2009 under the cooperation withIEEE and this standard was completely modifiedcompared with the old edition for the existing voltagelevels of 800kV and below, and also added the new itemslike as the insulation levels and for the UHV powertransformers exceeding 800 kV of the maximum systemvoltage, and also standardized the test methods like as theIVPD (Induced voltage test with partial dischargemeasurement).The insulation levels in the old edition had beenstandardized separately as “European practice” and“North American practice”. Then, in this project, theinsulation levels are standardized one set for the all areawith the cooperation of IEEE. Therefore, this project is agood experience to extend the joint work between IECand IEEE.REFERENCES[1] IEC TC 14/PT 60076-20, 2013, 14/778/CD “IEC60076-20: Power transformers – Part 20: Energyefficiency”, 2013-12-20Yukiyasu ShirasakaMr. Shirasaka received his B.S., andM.S., degrees in electrical engineeringfrom Musashi Institute of Technology.He joined Hitachi Ltd. in 1982.Currently, he is Senior Chief Engineer,Hitachi Ltd., Power System Company,Hitachi Works. He is an assistantsecretary for the IEC/TC 122, a chairman of the Japanesenational committee for the IEC/TC 14, a member of IECSMB/ACTAD and ACEE, IEEE, CIGRE and a expert forIEC/CIGRE WG’s.CONCLUSIONThis paper explains the recent activities of the TC 14,Power transformers, which provide a representative toIEC ACTAD. Although there are differences in itstechnical areas, strategies and roadmaps, every TCrelevant to ACTAD is very active to work for theinternational standardization. With the cooperationbetween regional experts and TC representatives,ACTAD will work continuously on the common subjectsand coordination issues between the related TCs tomaintain the harmonization of standards in IEC on thearea of electricity transmission and distribution.CIRED 20155/5
iec 60076-10-1 ed. 2.0 ccdv mt 60076-10 2015-12 5 iec 60076-11 ed. 2.0 (new) mt 60076-11 - 6 iec 60076-15 ed. 2.0 dec mt 60076-15 2015-07 7 iec 60076-16 ed. 2.0 amw mt 60076-16 2017-05 8 iec 60076-21 ed. 2.0 amw mt 60076-21 2018-02 9 iec 60214-2 ed. 2.0 amw mt 60214 2016-09 1
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