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Dielectric Test Subcommittee (DTSC) March 27, 2019

Anaheim, CA

IEEE PES Transformers Committee

Chair- Ajith M. Varghese

Vice Chair-Thang Hochanh

Secretary - Poorvi Patel

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AGENDA - DTSC A. Welcome & Chairman's Remarks A. Varghese

B. Circulation of Attendance Rosters T. Hochanh/P. Patel

C. Attendance for Quorum P. Patel

D. Approval of Meeting Agenda A. Varghese

E. Approval of Fall 2018 Meeting Minutes A. Varghese

F. Working Group/ Task Force Reports

• WG C57.168 Low Frequency Test Guide D. Sauer

• WG C57.113 Revision PD measurement A. Naderian

• WG C57.160 PD in Bushings/PTs/CTs T. Hochanh

• WG C57.98 Impulse Guide T. Hochanh

• WG C57.200 Bushing DFS D. Jun J. Cheng

• TF Revision to Low Frequency Tests B. Griesacker

• TF Revision to Impulse Tests P. Riffon

• TF Limits for Insulation PF and Resistance D. Robalino

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Chairman’s Remarks

Members or Guests who speak at the meeting – Name and

Affiliation

Motions/New Agenda during SC

Recommend submitting in writing to before the SC meeting

Future Transformer Committee & DTSC Meetings

Fall 2019 : October 27-31 Columbus, Ohio USA

Spring 2020 : TBD

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Chairman’s Remarks

WG/TF ACTIVITIES

WG’s should specify standards on performance and function and NOT on

design, construction or specification

Commercial activities are not allowed

WG/TFs to communicate agenda 14 days before the meeting

AM System MUST be used for attendance tracking

NO NEED TO INCLUDE LIST OF ATTENDEES WITH WG/TF MINUTES

Membership Rosters must to be update after each meeting

WG/TFs to keep website information current

Presentation done during Meeting shall be posted on website

WG/TF Minutes are needed 15 days from meeting

WG to make call on patent during each meeting

Changes to copyright policy – Clause 7 of IEEE standards Boards bylaws

and Clause 6.1 of IEEE-SA Standards board operation Manual

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Status of Active Standards

Project Title Valid Date Status

C57.127 Guide for the Detection of Acoustic Emissions 2028 Approved 2019

from Partial Discharges

C57.160 Guide for the Elec. Measurement of PD in HV 2020 Comment resoln

Bushing and Instrument Transformers PAR 2019

C57.113 Recommend Practice for Partial Discharge 2020 PAR 2021

Measurement Power

C57.98 Guide for Transformer Impulse Tests 2021 PAR 2022

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Status of Active Standards Project Title Valid Date Status

C57.138 Recommended Practice for Routine Impulse 2026 WG inactive

Tests for Distribution Transformers

C57.161 Guide for DFR Measurements 2028 WG inactive

C57.168 Low Frequency Test Guide NEW PAR 2022

C57.200 Bushing Frequency Domain NEW PAR 2022

Spectroscopy Guide (ENTITY WG)

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New Members of DTSC

• Requested Membership – Granted

• 0 – Lost Membership Due to Attendance

• Total Active Members are – 139

• For Quorum we need 70 members present.

No New Requests due to Roster issues in the last

meeting

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DTSC Membership S-19 (139 – Members)

Ajith M. Varghese Dominique Bolliger Marcos Ferreira

Poorvi Patel Jeffrey Britton Hugo Flores

Thang Hochanh Jagdish Burde Joseph Foldi

Hamid Abdelkamel Juan Castellanos Bruce Forsyth

Gregory Anderson Arup Chakraborty John Foschia

Tauhid Haque Ansari Craig Colopy Michael Franchek

Stephen Antosz Florian Costa Anthony Franchitti

Javier Arteaga Eric Davis George Frimpong

Donald Ayers J. Arturo Del Rio Eduardo Garcia

Barry Beaster Scott Dennis David Geibel

Enrique Betancourt Don Doris Jeffrey Golarz

Daniel Blaydon Florin Faur Rob Ghosh

William Boettger Reto Fausch Bill Griesacker

Alain Bolliger Roger Fenton Detlev Gross

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DTSC Membership S-19 (139– Members)

Ismail Guner Deepak Kumaria Juliano Montanha

James Graham Raja Kuppuswamy Emilio Morales-Cruz

John Harley Kranich Neil David Murray

Roger Hayes David Larochelle Ali Naderian

Peter Heinzig Weijun Li Aniruddha Narawane

John Herron Kerry Livingston Dwight Parkinson

Philip Hopkinson Gregorio Lobo Harry Pepe

Marion Jaroszewski Thomas Lundquist Mark Perkins

John John Tim-Felix Mai Oscar Pinon

Stephen Jordan James McBride Donald Platts

Kurt Kaineder James Mciver Klaus Pointner

Sheldon Kennedy Vinay Mehrotra Bertrand Poulin

Stacey Kessler Thomas Melle Thomas Prevost

Egon Kirchenmayer Kent Miller Jarrod Prince

Alexander Kraetge Rashed Minhaz Ulf Radbrandt

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DTSC Membership S-19 (139 – Members)

Ion Radu Mark Shem-Tov Alwyn VanderWalt Rakesh Rathi Peter Sheridan Jason Varnell Pierre Riffon Hemchandra Shertukde Kiran Vedante

Diego Robalino Alan Sbravati Rogerio Verdolin Rodrigo Ronchi Steven Snyder Krishnamurthy Vijayan Mickel Saad Sanjib Som Dharam Vir Hakan Sahin Michael Spurlock Loren Wagenaar

Jose Salva Fabian Stacy Sukhdev Walia Amitabh Sarkar Andrew Steineman David Wallace Daniel Sauer Craig Stiegemeier David Wallach Mathieu Sauzay Charles Sweetser David Walker Ewald Schweiger Janusz Szczechowski Bruce Webb Pugazhenthi Selvaraj Troy Tanaka Matthew Weisense Kabir Sethi Vijay Tendulkar Eric Weatherbee Hamid Sharifnia Edger Trummer Daniel Weyer Devki Sharma Subhash Tuli Alexander Winter

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DTSC Membership S-19 (139 – Members)

Baitun Yang Joshua Yun Peter Zhao

Leo Zibert

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AGENDA - DTSC A. Welcome & Chairman's Remarks A Varghese

B. Circulation of Attendance Rosters T. Hochanh/P. Patel

C. Attendance for Quorum P. Patel

D. Approval of Meeting Agenda A. Varghese

E. Approval of Fall 2018 Meeting Minutes A. Varghese

F. Working Group/ Task Force Reports

• WG C57.168 Low Frequency Test Guide D. Sauer

• WG C57.113 Revision PD measurement A. Naderian

• WG C57.160 PD in Bushings/PTs/CTs T. Hochanh

• WG C57.98 Impulse Guide T. Hochanh

• WG C57.200 Bushing DFS J. Cheng

• TF Revision to Low Frequency Tests B. Griesacker

• TF Revision to Impulse Tests P. Riffon

• TF Limits for Insulation PF and Resistance D. Robalino

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AGENDA - DTSC TF – Transient Mitigation ( C57.142) J.McBride

Liaison Reports

• IEEE 4 (HVTT) J. Britton

G. Old /Unfinished business A. Varghese

H. New Business A. Varghese

I. Adjournment

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Working Group/Task Force Reports

WG C57.168 Low Frequency Test Guide D. Sauer

WG C57.113 Revision PD measurement A. Naderian

WG C57.98 Impulse Guide T. Hochanh

WG C57.160 PD Guide Bushings/PTs/CTs T. Hochanh

WG C57.12.200 Bushing FDS J. Cheng

TF Revision to Low Frequency Tests B. Griesacker

TF Revision to Impulse Tests P. Riffon

TF Limits for Insulation PF and Resistance D. Robalino

TF on Impulse Transient (Part of C57.142) J. McBride

Liaison Report – HVTT J. Britton

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S19 Update: WG PC57.168 LF Di-Test Guide

Quorum: Achieved Agenda:Approved MOM: Approved

Highlights:

• WG approved a definition of LF Di-Test:

– Dielectric tests in which the test voltages are alternating voltages with frequencies less than 500 Hz from an external source.

– This definition will be forwarded to C57.12.80 for update

• The basic outline and approach received from Dave Giebel

was shown and generally agreed upon without any verbal

objections.

• The members indicated a primary focus on the Applied and

Induced Tests. The WG will start there.

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S19 Update: WG C57.113 – PD Test Guide

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S19 Update: WG C57.98 Impulse Test Guide

Quorum: First Meeting MOM: N/A Agenda: Available

Highlights:

Aside of the new addition of the k-factor to the guide, the feed-

back from the WG is that there will be nothing to revise to the

actual guide.

The focus of the discussion of the WG was on the parameters

that will define the use of the

The beta-prime or the relative % of the peak value of the

overshoot, when referred to the base/filtered curve

The display of a recorded waveform after a test

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WG C57.160 PD Guide Bushings/PTs/CTs

Did not meet during S19

Highlights:

The document was submitted for ballot. The return rate and

the approval was above the minimum. To include many

editorial comments, the document will be revised and

recirculate for balloting.

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WG C57.127 : Guide for the Detection of Acoustic

Emissions from Partial Discharges

DFR on Bushings - PC57.12.200

Chairman: Deng Jun

WG Progress Update

Timeline

1 First WG meeting in Guangzhou, CN

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3 Second WG meeting in LA,US

4 Third WG meeting in Shenyang, CN

November 27th, 2018

November 28th, 2018 – March 22nd, 2019

First edition of the guide is completed

March 25th, 2019 – March 27th, 2019

July, 2019 (to be fixed)

Achievements

Following tasks have been completed:

Frist draft of bushing DFR testing guide - PC57.12.200

A few typical case studies of Oil Impregnated Paper,

OIP bushings

Discussion and feedback collection for the first draft

Future work

Revise the first draft of the guide

Cooperate with OEM’s to carry out further research work

on OIP bushings and other bushing types

Evaluate validity of the mathematical DFR model for

bushings

Release the second draft prior to the third WG meeting

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S19 Update: Revision to Low Frequency Test

Quorum: Achieved MOM: Approved Agenda: Approved

Highlights:

TF - Factory PD Limits – Motion approved to adopt some IEC limits.

PD Test for Wound Core Transformers – Distribution Transformers SC to be included. Phil Hopkinson was requested to present the results of the survey.

PD test for Class 1 Transformers – Motion approved to move ahead with developing test procedure, test levels, and acceptance limits. Don Ayers agreed to lead effort.

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Draft Text of PD Limits for Class II transformer for Survey within DTSC

C57.12.90 Clause 10.8.5 Failure detection

Failure may be indicated by the presence of smoke and bubbles rising in the oil, an audible sound such as a thump, or a sudden increase in the test current. Any such indication shall be carefully investigated by observation, by repeating the test, and by other diagnostic tests to determine whether a failure has occurred. In terms of interpretation of partial discharge measurements, the results shall be considered acceptable and no further partial discharge tests required under the following conditions:

a) The magnitude of the partial discharge level does not exceed 500 pC 250pC during the 1 h test period.

b) The increase in partial discharge levels during the 1 h period does not exceed 150 50 pC.

c) The partial discharge levels during the 1 h period do not exhibit any steadily rising trend, and no sudden sustained increase in the levels occurs during the last 20 min of the test.

Judgment should be used on the 5 min readings so that momentary excursions of the partial discharge readings caused by cranes or other ambient sources are not recorded. Also, the test may be extended or repeated until acceptable results are obtained. A failure to meet the partial discharge acceptance criterion shall not warrant immediate rejection, but it shall lead to consultation between purchaser and manufacturer about further investigations.

No changes to C57.12.00 Cl.5.10.5.5.

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TF : Revision of Impulse Tests..

Quorum: NOT Achieved MOM: Not Approved Agenda : Not Approved

Will be requesting approval of Agenda and MOM by email

Highlights: • The first item of business was related to a proposal of modifications to

clause 10.3.2.1 of C57.12.90 concerning the condition of tertiary and

stabilizing winding terminals during lightning impulse tests. This proposal

was already surveyed within the TF membership and guests with an

approval rate of 100%. The proposal was now surveyed within the

Dielectric Tests Subcommittee and got an approval rate of 98.7%.

Comments received have been presented and discussed during the

meeting and it was no objections to the TF Chair observations made on

these comments.

The final text will be sent to the Dielectric Tests SubCommittee Chair for

transmission to Steve Antosz for inclusion in the next IEEE C57.12.90 draft..

.

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TF : Revision of Impulse Tests (Cont’d)

Highlights: • The second item of business was related to a proposal of modifications

to clause 10.2.4 of C57.12.90 concerning the tap changer position

during switching impulse tests. This proposal was sent within the TF

membership and guests. This proposal was already surveyed within the

TF membership and guests with an approval rate of 92.9%. The

proposal was now surveyed within the Dielectric Tests Subcommittee

and got an approval rate of 96.5%.

The final text will be sent to the Dielectric Tests SubCommittee Chair for transmission

to Steve Antosz for inclusion in the next IEEE C57.12.90 draft.

Anaheim, CA March 26, 2019

TF Chair: Diego Robalino (MEGGER) TF Secretary: Aniruddha Narawane (PDI)

TF Winding Insulation PF/Resistance Limits

Minutes of the meeting

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• Meeting was called to order at 8.00 am Total 86 attendees. 30 members, 56 guests with 6 guests requesting membership.

• Quorum achieved. Agenda for S19 meeting and minutes from F18 were approved.

• Clarification was provided on guides and references to complete the data acquisition spreadsheet

– Reminder that the data is to define limits for transformer acceptance / commissioning.

• Non-disclosure agreement provided to members and guests. Questions to be addressed directly to IEEE SA.

– Ernesto Vega Janica e.vegajanica@ieee.org

• Action plan for this TF: – Minor revisions requested during this meeting will be incorporated in the data acquisition

spread sheet

– The revised spread sheet will be shared with all members and guests of the TF.

– Data collection will go until June 1st. Data goes directly to: • Ernesto Vega Janica e.vegajanica@ieee.org

– Meetings will be set up to analyze data and formulate report to DTSC

– Next meeting expecting to be the last for this TF.

• With no other business meeting was adjourned at 8.50 am.

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TF update on Mitigation Methods (Under WG C57.142)

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S19 High Voltage Testing Techniques (HVTT)

Subcommittee Liaison Report

Subcommittee met at January 2019 PES Joint Technical

Committee Meeting in Anaheim, CA

Active Projects Include

IEEE P1122 – Impulse Digitizer Standard. Draft 3 in development.

PAR expires end of 2019 – Will request 1 year PAR extension.

Chair: Jeff Britton, Phenix Technologies, Inc.

IEEE P510 – High Voltage Safety Guide. The Guide is presently in

draft development, with drafts submitted for all sections. PAR expires

end of 2020 – Chair: Jeff Hildreth, Bonneville Power Administration

IEEE P2426 – Field Measurement of Fast Front and Very Fast Front

Overvoltages in Electric Power Systems (Entity PAR). In draft

development, PAR expires and of 2021. WG Met in Xi’an China in

January, 2019 Chair: Shijin Xie, State Grid Corporation China

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Active Projects (continued)

New WG for Fall 2019: “Guide for the Detection, Measurement and

Interpretation of Partial Discharges” (General IEEE PD Guide)

Chair: Detlev Gross, Power Diagnostix

New WG for Fall 2019: “Guide for the Practical Implementation of

IEEE Std4-2013 on High-Voltage and High-Current Measurement

Systems”, Chair: Bill Larzelere, Evergreen High Voltage

New TF for Fall 2019: Topics for Revision of IEEE Standard 4 - 2013

Next HVTT Meetings

Scheduled during week of September 16th, 2019 in Fayetteville, GA

Electronic attendance is offered for most HVTT SC, WG and TF

meetings via web meeting, so physical attendance is not required to

participate and qualify for membership

Contact Jeff Britton (jeff@phenixtech.com) or Jim McBride

(jim@jmxhv.com) to participate

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Old/Unfinished Business

• NONE

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AGENDA - DTSC G. Liaison Reports

• IEEE 4 (HVTT) J. Britton

H. Old Business A. Varghese

None

I. New Business A. Varghese

• Any new items

J. Adjournment

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New Business

• None

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AGENDA - DTSC G. Liaison Reports

• IEEE 4 (HVTT) J. Britton

H. Old Business A. Varghese

• None

I. New Business A. Varghese

• Any new items

J. Adjournment