HVSPD Subcommittee Meeting
September 11, 2003
Page 1
Minutes of HVSPD Subcommittee Meeting
Marriott Hotel
Clearwater Beach, Florida
November 11, 2010
Steve Hensley, Chairman
-- UNAPPROVED --
HVSPD Subcommittee Meeting
November 11, 2010
Page 1
1.Call to Order
The meeting was called to order Thursday,November 11 at 3:15p.m.
2.Attendance
The following were in attendance:
NameAffiliationMember
Steve Hensley (chair) / Sargent & Lundy / MMichael Champagne (vice chair) / Entergy / M
Mike Comber / Hubbell Power Systems / M
Thomas J Rozek / DTE Energy / M
Christine Goldsworthy / BPA / IP
Jim Wilson / Retired / M
M = Member; G = Guest; IP= Interested Party
The subcommittee reviewed the IEEE-SA Standards Board Bylaws on Patents and Standards to those present.
3.Minutes
The spring 2010 meeting minutes were circulated prior to this meeting via e-mail. Members were asked at this meeting to review them and provide comments to the chair within 7 days. After 7 days, the minutes will become approved unless comments are returned.
4.Working Group Meetings were held for:
3.3.11Continuous Revision. of C62.11Mike Comber
3.4.8Protection & Insulation Coord. Of TransformersEva Tarasiewicz
3.4.13Protection of Generating PlantsRusty Robbins
3.4.14Continuous Revision of C62.22Tom Rozek
3.4.16Separation EffectsTom Field
3.4.18Insulation CoordinationIuda Morar
3.5.7Neutral GroundingSteve Whisenant
5.Key Points from review of working group minutes
Note:All working groups reviewed the IEEE–SA Standards Board Bylaws on Patents and Standards to those present in each WG meeting.
3.3.11-Continuous Revision of C62.11
Mike Comber, Chair
Task force 14 met to continue its work on test rationale.
The WG is continuing its work to revise C62.11 (Arrester Test Std.). The WG is considering modifications to some tests described in C62.11. These include:
- The front-of-wave (FOW) test to account for the inductance of the line and ground lead voltage drops.
- Accelerated aging test, the WG will keep the Ferris wheel portion of the test but remove the 5000 hour test. Use of partial discharge to verify the results.
- The remaining changes will only be tweaks to tests; no new test will be introduced.
The meeting in San Diego next spring will be a wrap-up activity on the document.
Two new people were approved for membership in this WG.
3.4.8 - Protection & Insulation Coordination Of Transformers
Eva Tarasiewicz , chair
The WG reviewed the Test Results section of the Heilman paper the Fall Meeting in Clearwater, Florida, and discussed the comparison of calculated and measured transferred surge voltages. The example originally written by Keith Stumpf applies correctly to lightning surges and should be included in the new section 5.2.2.3.1 Surge Transfer Through Transformers. While the calculation pertains to the lightning protection level (LPL), there is a concern on how to handle the electrostatic component of the surge. The chair asked Ray Hill to write a proposed text to address this concern.
In the ongoing effort to address Ed Taylor’s Comment (#6), there was a discussion on the definition of chopped wave test. Michael Champagne will write a proposal to change the text in Table 6 of C62.22 to agree w/ C57.98, latest revision as well as a footnote to explain the change. It is still not clear if Mr. Taylor’s problem is with impulse duration, voltage withstand, or both. Peter Dick agreed to provide a reference for the measured surge through transformers.
3.4.13 – Protection of Generating Plants
Rusty Robbins, chair
The WG discussed outstanding proposed changes for resolution ofthe 2001 C62.23 reaffirmation balloting comments. The following are action items for WG members.
Revise subclauses identified as SCOPE to either directly under the heading or assign another title (i.e. objective, overview, etc.).
Provide wording for subclause 4.2.1 to provide short paragraph to demonstrate dramatic differences between shielded and unshielded wires with respect to insulation stress. Cliff Erven provided example calculation to demonstrate this. Chair will forward to Steve Whisenant for recommended wording to this clause.
Provide wording to subclauses 4.2.1.2 and 4.2.1.3 related to soil resistivity quantified values which determine grounding design methods. Steve Whisenant will provide recommended wording to these clauses.
Provide wording to subclause 4.2.1.4.2 by changing subject sentence from “can” to “may” as well as receive feedback from utility substation design experience.
Receive more information on EPRI referenced source without actual assigned document title or number. Subclause 6.2.3.2.1, page 33, line 32 appears to be an IEEE paper (B65) instead of 1990 EPRI document which scope does not include generator protection. Subclause 5.2.3.7 indicates research by EPRI however no document has been found. Utility did not have information on this. WG to search public domain. This clause should be reworded including title from energized PTs which indicates PTs are energized separate from the associated bus which is not the case. Additional CVTs are used instead of PTs in HV switchyard design. Peter Dick said that there have been failures of CVTs secondary windings grounded at one end.
3.4.14 –Continuous Revision of C62.22
Tom Rozek, chair
Reigh Walling has agreed to write a clause on the application of surge protection at wind farms (greater than 1000 volts). Reigh had provided two papers that the chair will forward to the WG members.
The IEC 60099-5 arrester application guide is currently at CDV. It was reported in a previous meeting that the latest draft of the IEC arrester application guide is much larger than their currentdocument. Mike Comber will send a copy of the CDV to the WG chair who will then forward it to the WG members for their review. The members are asked to review the document and to send their comments toJonWoodworth.
At the spring meeting NEMA reported that the numbers shown in Tables 1 and 9 haven’t changed much over the years. NEMA is waiting for the WG to determine if we still desire to have these two tables and how to display the information. The chair stated that this won’t be decided until the WG sees a draft of the arrester selection process based on energy handling capability (PAR C62.22a).
Cliff Erven had a BRC comment pertaining to adding additional fuse information in clause 6. Jim Strong wasn’t able to attend the meeting, but provided the chair with a discussion in an email. The chair passed out a copy of it at the meeting and will forward the message to the WG members. The members are asked to review the discussion and provide their comments to both Cliff and Jim.
TF1 had been created to review the surge protection of shunt capacitor banks. Christine Goldsworthy has agreed to replace Larry Vogt as chair. Jon Woodworth said that ABB had a published an application guide on this subject. Mike Comber found the link and will forward it to the chair. The chair will download the publication and forward it to the WG members.
TF2 had been created to coordinate the application guide with the ongoing work in WG 3.3.11. Jon Woodworth has volunteered to chair the TF. PAR C62.22a had been approved for this work and was originally written to only amend the guide to include the selection of arresters based on their thermal energy handling capability. However, additional work in WG 3.3.11 has been completed or is nearing completion. Jon Woodworth suggested revising the PAR to also include the repetitive single shot test, the lead length information from the FOW test, and any other significant or major changes in the next balloted draft of C62.11. Mike Champagne will provide the chair with suggested wording for the Scope and then the chair will procedure with revising the PAR.
TF3 had been created to address a BRC comment from Carl Schuetz pertaining to the clearances in clause 5.2.3.3. He asked for additional information pertaining to arrester clearances between other equipment (i.e. bushings, insulators, potheads, etc) on the same phase. Christine Goldsworthy has agreed to be the temporary chair with membership including Senthil Kumar, Eva Tarasiewicz and Jim Strong.
TF4 was created at the last meeting to review clause 7 following Jon Woodworth’s special TF meeting entitled “TLA Application Overview.” The material in clause 7 needs to be reviewed and expanded to include the additional topics identified. Jon mentioned that the Cigre C4 301 brochure and the IEC 60099-5 CDV would be good resources. These references will be emailed to the WG members for their review and comments for the next meeting.
Jon Woodworth had redrawn the graph in Figure 10 of C62.22 and will forward it to the chair for the next revision of the document.
The chair confirmed that Tom McDermott was the principal author of clause 7. Tom provided by email suggested wording to define the variables used in Equation 37. He also corrected a couple of issues with the associated figure. Mike Champagne will review Tom’s input and provide an update for the next meeting.
The chair will follow up with Tom Field regarding Annex F.3 by providing him the comments submitted by Roy Alexander during the BRC process. His comment requires reviewing EMTP newsletters and reference IEEE papers on modeling.
WG 3.4.8 is finishing the task of revising the clause on surge transfer through transformers. An open action item for WG 3.4.8 is to review Ed Taylor’s comment pertaining to the switching surge waveshape listed in Table 6 for transformers. Another open action item is to review Jeff Nelson’s comment on protection of three single-phase transformers that are separated by some distance.
3.4.18 - Insulation Coordination
Iuda Morar, Chair
This WG is in the process of ballot resolution of C62.82.1. It worked to address those comments at this meeting and is preparing the document for re-ballot.
IEEE Std. 1313.2 is being re-affirmed and this WG is addressing comments received during the most recent ballot. The WG worked to prepare responses from comments received from the re-affirmation ballot.
3. 5.7 - Neutral Grounding
Steve Whisenant, chair
The WG is working on several documents, each of which is being addressed by a task force:
Task Force Reports:
1C62.92.1 Introduction – Michael Champagne
Expiration date of the PAR for this document is December 31, 2013.
Heather McNeely has resigned as chair. Michael Champagne has agreed to serve as Task Force Chair for C62.92.1 – Introduction.
2C62.92.2 Synchronous Generators – Steve Whisenant, Chair
Expiration date of the PAR for this document is December 31, 2013.
A draft is being prepared.
3C62.92.3 Generator Auxiliaries – Rusty Robbins/Steven Whisenant, Co-Chairs
Expiration date of the PAR for this document has been extended to December 31, 2011.
Steven Whisenant and Rusty Robbins are serving as co-chairs. The plan is to prepare a new draft following this meeting, send it out for Task Force review and start the balloting process before the expiration date.
4C62.92.4 Distribution – Larry Vogt, Chair
An extension to the PAR has been approved and it now expires December 31, 2011.
A draft in the IEEE template has been prepared. Comments from the previous reaffirmation will be incorporated and the document will be circulated within the WG for approval prior to initiating the balloting process. The balloting process should begin by December 2010.
Jon Woodworth will review the issue of silicon carbide arresters in the document.
Don Parker will review to determine if he can pick up this activity.
5C62.92.5 Transmission – Michael Champagne, Chair
Expiration date for this document is December 31, 2014.
6C62.92.6 Distributed Generation – Frank Waterer, Chair
This task force has no progress to report and has held no meetings.
It was suggested that a letter of inquiry be written and posted to the OC and sent to the PES to determine: 1. What are the current practices? and 2. What are issues or questions in grounding of generation sources rated less than 1000 volts that are tied to the utility system?
Steve Whisenant will compose such a letter and send it to Joe Koepfinger and Frank Waterer for review before posting and sending to PES.
New business – The Chair circulated a paper from Aaron Kalyuzhny of the Israel Public Electric Utility. The paper defines effectively grounded systems in terms of maximum phase-to-ground voltages rather than in terms of sequence impedances. He asks for comments on his suggestion.
Attendees are asked to review the paper and send comments to the Chair by 12/31/10
6. Membership:
Christine Goldsworthy was approved for membership is these working groups:
3.3.11; 3.4.8; 3.4.16; 3.4.18.
7.Adjournment:
The meeting was adjourned at 4:05p.m.
Respectfully submitted,
Michael K. Champagne,
Vice Chair