C:         SYSTEM PROTECTION SUBCOMMITTEE

Chair: S. Ward

Vice-Chair: J. O’Brien

 

The C System Protection Subcommittee met on Thursday, September 15, 2011, in Minneapolis, MN with 24 members and 31 guests in attendance. Quorum was not reached.

 

7 Working Groups and 2 Task Forces met at this meeting.

 

PSCE liaison report: Nothing to report.

 

PSSC liaison report: Report is included in the CTF3 meeting minutes.

 

OLD BUSINESS

 

None

 

NEW BUSINESS

 

None

Reports from the WG Chairs

C2:       Role of Protective Relaying in the Smart Grid

Chair: Alex Apostolov

Vice Chair: Mark Peterson

Output: IEEE Report

Established: January 2010

Expected Completion Date: To Be Determined

 

Assignment:  Identify the functions and data available in Protective Relaying Devices that are used at different functional levels and different applications and can be used within a Smart Grid.

Describe the use of interoperable data formats for protection, control, monitoring, recording, and analysis.

 

Working Group C2, Role of Protective Relaying in the Smart Grid, met on Tuesday with 12 members and 12 guests.

 

In the absence of the WG Chair and Vice Chair, the meeting was chaired by Solveig Ward. Unfortunately, she had not had a chance to prepare as the Chair had not informed Sub C that he would not attend the September meeting.

 

The session consisted of brain storming, trying to identify Smart Grid functions external to the conventional utility applications that could benefit from data and/or functionality provided by protective relays.

 

Mark Simon, Chair of the parallel H2 WG dealing with Smart Grid communications requirements agreed to share the H2 draft with C2 members in order for C2 to avoid overlap with this group.

 

The H2 draft will be sent out to C2 members with the September meeting minutes and members were assigned to read the draft before the January meeting.

 

For the January 2012 meeting, the working group requests a single session, a room to accommodate 40 people, and a projector.

C4:       Guide for Phasor Data Concentrator Requirements for Power System Protection, Control, and Monitoring (PC37.244)

Chair: Galina Antonova

Vice Chair: Vasudev Gharpure

Output: Guide C37.244

Established: January, 2011

Estimated Completion Date: To be determined

 

Assignment:  Develop a guide for performance, functional, and information communication needs of Phasor Data Concentrators for power system protection, control, monitoring, and information management.  The Guide will include system needs for PDC applications, configuration, and testing procedures.

 

Working Group C4 met on September 13, 2011 in Minneapolis, MN in a double session with 21 attendees (11 members and 10 guests).  Quorum was not achieved. May 2011 meeting minutes will be approved electronically.

 

After introductions, Working Group Chair presented IEEE Patent Policy slides and asked to bring up any patent issues. None were identified.

 

Working Group Chair updated the group on project status:

-       Working PC37.244 draft is dated July 29, 2011

-       1st Conversion to IEEE format completed in August 2011

-       Review by IEC TR 61850-90-5 experts is planned

-       PDC Functions (Section 5) were agreed

-       PDC Requirements (Section 5) is in works.

 

Discussion on Advanced Communication Requirements (Section 6.2.2) followed. The group agreed that core discussion and agreements are needed on Data Alignment and Data Aggregation functions. It was suggested to re-order and move sections from Advanced Communication Section to Data Alignment section, then continue discussions on this topic.

 

Working Group Chair reminded that the group has regular conference calls on Monday and Friday 10am – 11:15am Pacific time, and invited members and guests to participate.

 

Requirements for the next meeting: a double session, meeting room for 30 people with a computer projector.

 

C5:       Guide for Synchronization, Calibration, Testing, and Installation of Phasor Measurement Units PC37.242

Chair: Farnoosh Rahmatian

Vice Chair: Paul Myrda

Output: Guide C37.242

Established: May, 2010

Estimated Completion Date: June, 2011

 

Assignment:  Develop a Guide for Synchronization, Calibration, Testing, and Installation of Phasor Measurement Units (PMU) for Power System Protection and Control

 

Scope: The document provides guidance for Synchronization, Calibration, Testing, and Installation of Phasor Measurement Units (PMU) applied in Power System Protection and Control. The following are addressed in this Guide:

       Considerations for the installation of PMU devices based on application requirements and typical bus configurations

       Techniques focusing on the overall accuracy and availability of the time synchronization system

       Test and calibration procedures for phasor measurement units (PMUs) for laboratory and field applications

       Communication testing for connecting PMUs to other devices including Phasor Data Concentrators (PDC)

 

Purpose: This guide is intended to be used by power system protection professionals for PMU installation and covers the requirements for synchronization of field devices and connection to other devices including Phasor Data Concentrators (PDC).

 

The Working Group met on September 14, 2011 in a double session. Sessions were chaired by vice-chair Paul Myrda.  The first session had 13 members and 9 guests and the second session had 10 members and 6 guests.

 

The IEEE-SA Patent Slides were presented – there were no comments from the participants.

 

The minutes of the May 2011 meeting were approved in the first session with a quorum of members.

 

During the first session, the document revisions were reviewed and discussed.  This activity was led by Vahid Madani. 

 

During the second session there was a discussion led by Solveig Ward on the ability/availability of the current Chair to continue in this capacity due to extensive external and business related time demands or to replace him with a new Chair that will be able to attend to the WG process more effectively.  There was a motion to elect a new chair and Farnoosh Rahmatian volunteered and was approved by the working group as the new chair.

 

The rest of the session continued with a review of the proposed guide changes.

 

The WG will be organizing weekly conference calls to accelerate document revision – Action Farnoosh Rahmatian and Paul Myrda.  The team will be coordinating the weekly conference calls with WG C4 since the two WG share several members/resources.

 

The Working Group is still planning on initiating the process to form a balloting pool at the earliest opportunity. 

 

A double session with a room for 40 people and a computer projector is requested for the January JTCM meeting.

 

C13:     Undervoltage Load Shedding Protection

Chair: Miroslav Begovic

Vice Chair: Shinichi Imai

Output: IEEE Report

Established: September 2005

Expected Completion Date: May 2012

 

The WG meet on September 14, 2011, in one session, attended by 2 members and 9 guests.

 

The WG report, which was sent to the SC members for balloting, has received only 18 ballots so far (16 positive and 2 negative). One of the negative ballots was verbally converted to positive during the discussion about the requested changes, while the other negative ballot, requiring a number of typos and editorial corrections to be done, will also hopefully become a positive ballot when the revision of the report is completed.

 

As most of the editorial changes are of non-substantive nature, re-balloting will not be needed upon corrections. It will be needed, however, to obtain 75 percent of the SC membership votes (current SC membership stands at 45, which means that for the minimum passing vote the report will need 34 votes, or at least 16 additional votes.

 

Once the report is corrected (during the month of October), the report and ballots will be sent once again to the SC membership with request to those who have not voted to send their ballots so that the process be completed. The plan is to conclude the process in January 2012 at the JTCM meeting and begin work on the summary paper(s).

 

Working Group is planning a meeting in a single session in January 2012. Room will be needed for 15 attendees and a video projector.

C14:     Use of Time Synchronized Measurements in Protective Relaying Applications

Chair: Jim O’Brien

Vice Chair: Alla Deronja

Output: IEEE Report

Established: May 2007

Expected Completion Date: Dec 2012

 

Assignment:  Produce a general report to PSRC Subcommittee C outlining practical protection applications using synchrophasors.

 

Working group C14 met on September 13, 2011, in Minneapolis, MN, in a single session chaired by Jim O’Brien with 4 members and 9 guests present.

 

The chair distributed the latest draft of the Report.  The Report nears completion and requires final editing. A few outstanding issues were discussed during the meeting.

 

The title of Figure 2.1 on page 4 was proposed to be revised to CT ratio correction factors from original Relative errors for metering and protection CTs; however, it was decided to keep the title as is.

 

There was an issue with the limits of the data loss and the reference for the communication infrastructure requirements in section 3.1 on page 10. The sentence in question was re-written as follows: Dropout tolerance depends on a particular application and should be determined on case-by-case basis.

 

In section 4.12 on page 32, Jay Murphy will check with Ken Martin about the subsection 4.12.2 a), which is in question due to a statement that values of Xd and Xq (generator steady-state reactances) might vary with the generator operating conditions. Also, the introduction to this section will be dropped because its reference Standard C37.118.1 is not approved yet at this time.

 

It was decided that the topic on Synchrophasor application to controlled islanding, which was moved from subsection 5.12 to 5.10 would be a separate subsection. The chair will contact Demetrious Tziouvaras, who was supposed to expand on this topic, whether he would do so; otherwise, the new subsection will contain the present material.

 

Alex Apostolov was to contribute a write-up to address different synchrophasor measurements – for metering and for protection and latency and time synchronizing requirements for the protection synchrophasor measurements based on the IEC standard 90-5. The chair will contact Alex whether he would provide this contribution. If not received, this topic will be left out from the Report.

 

Other editorial comments by those present at the meeting were addressed.

 

The chair will incorporate the latest changes, edit, and recirculate the latest Report draft for approval by the WG members. It will then be submitted to the Subcommittee C, and the volunteers from the WG members will be needed to put together Power Point document for a presentation at one of the future PSRC Main Committee meetings. If any WG member would like to contribute to the Power Point presentation, please contact the Chair or vice-chair.

 

The next meeting in January of 2012 is requested to be scheduled and may be the last.

 

Requirements for the next meeting are as follows: single session, meeting room for 25 people with a computer projector.

C15:     Design and Testing of selected SIPS

Chair: J. Sykes

Vice-Chair: Y. Hu

Output: Report on industry practices in design and testing of selected SIPS

Established: September 2008

Expected Completion Date: December 2012

 

Assignment: Write a report in industry practices and testing of selected SIPS (System Integrity Protection Schemes)

 

Working group C-15 met on Tuesday, September 13, 2011 in Minneapolis, MN, in single session chaired by Yi Hu with 7 members and 7 guests attending.

 

During the meeting, the latest comments provided by the WG members and review team members on the latest draft report were reviewed and discussed. Members and guests also reviewed and discussed the latest additional contributions provided by working group members. Conclusions / resolutions on significant comments were as follows.

 

·         In section 3.II RAS Requirements, it was decided to utilize milliseconds consistently instead of cycles.

 

·         In the same section, it was clarified that the breaker failure time is included in the RAS operating time, and insulator contamination was included as one of the reasons of transmission line faults.

 

·         Additionally, the term SIPS will be utilized throughout the Report, and other references such as RAS (Remedial Action Scheme) will be eliminated. This is consistent with the title of the Report and PSRC definition.

 

·         In Section 4, Load Rejection, a comment was that the section is very generic and does not have a particular example like other sections do. A practical example needs to be included. Alex Apostolov, the original author, will be contacted for the example; also, Fernando Calero will try to provide one.

 

·         Figure 2.1.4 is illegible. Mark Adamiak will be contacted to provide a better version of it.

 

·         Also, a clarification will be added to the Introduction section by Yi Hu regarding presenting actual examples of SIPS in the Report, not a SIPS theory.

 

·         A question regarding the centralized, localized, and distributed SIPS definitions was raised. A recently completed WG C4 report Global Industry Experience with System Integrity Protection Systems has these definitions, which need to be consistently followed. The WG members will review the C4 report and discuss the issue at the next meeting.

 

·         Other comments were to define acronyms SCD and SCE (pp. 31-32) used in the Report.

 

·         Also, a question of the difference between load rejection and load mitigation was raised. This issue is covered in Appendix A of the C4 report Global Industry Experience with System Integrity Protection Systems. Yi will add text to Section 1 defining the SIPS, which are described in the present Report.

 

·         A subject of Optimal Power Flow is not mentioned in Section 2 although it is referred to Section 2 in Section 5. This needs a correction.

 

·         The WG also discussed the newest contribution by Vahid Madani for subsection 2.4 Redundancy Considerations.

 

The latest comments will be implemented in the current draft of the Report, and a new draft will be put together and circulated among the WG members before next meeting. The members will need to review the document.

 

Next step actions:

 

Planned next step actions before January 2012 PSRC meeting are as follows:

o    WG Chairs to follow on a few specific comments with respective section authors

o    WG Chairs to create a new version of the draft report to include all new contributions, make necessary edits, and re-distribute it to WG members and review team members for review and comment

o    WG members and review team members to review and provide comments

o    WG Chairs to create a combined comments list for review and discussion at next meeting

 

The working group will meet at next PSRC meeting in one session to review the next draft of the report.

 

Requirements for Next Meeting – Room for 30 People, single Session, Projector, Power strip

C16:     Relay Scheme Design Using Microprocessor Relays

Chair: R. Lascu

Vice-Chair: T. Seegers

Output: Report

Established: September 2008

Expected Completion Date: To be determined

 

Assignment: Write a supplement to the existing 1999 relay trip circuit design paper as an IEEE report to address microprocessor relays.

 

Working Group C16 held its meeting on Monday afternoon with 17 attendees. Eleven working group members were in attendance.

Guest Brian Boysen has been added as a member.

 

The working group chair reiterated to the group that the intent of the report is to serve as a supplement to the much older trip circuit design report.

 

Draft 2.6 of the paper was discussed.  Several sections of the paper were assigned for revision. 

 

Ken Behrendt will look into section 4.4.1

 

The question was raised as to what to do with the final paragraph of 2.6.1 which doesn’t belong.  It may be placed with 2.6.2 concerning battery ground considerations.

 

Brian Boysen will revise figure 2.6.2 to add a logic diagram

 

Adi Mulawarman will rewrite section 3 to make the logic shown more vendor generic.

 

Don Lukach will rewrite section 2.7 on scheme complexity

 

Angela Higdon will add to section 3.3

 

All assignments are due by October 31.

 

Next meeting requirements:    Single meeting, 30 persons, computer projector.

Request that the meeting does not conflict with the D6 and the I5 working group whose assignment is complementary to this working group.

C17:     Fault Current Contribution from Wind Plants

Chair: D. Miller

Vice-Chair: G. Henneberg

Output: Report by the Joint Working Group

Established: January 2009

Expected Completion Date: 2012

 

Joint WG Assignment: To characterize and quantify short circuit current contributions to faults from wind plants for the purposes of protective relaying and equipment rating, and to develop modeling and calculation guidelines for the same.

 

C-17 WG Assignment:  To support the activities of the Joint Working Group on Fault Current Contributions from Wind Plants.

 

The Joint Work Group met in a single session at the PES Joint Technical Committee Meeting in Atlanta, GA on Wednesday January 11, 2011 with 10 members and 22 guests.

 

The Joint Work Group met in a single session at the PSRC meeting in Minneapolis, MN on Tuesday September 13, 2011 with 16 members and 10 guests.

 

Dean Miller reviewed the status of the report and writing assignments.  Most writing assignments have been submitted, though 3 are still outstanding.  Dean provided paper copies of version 4.0 plus a new submittal for section 3.4.  The combination is draft 4.1.  Assignments have been submitted for wind turbine Types I, II, IV, and V.  Assignments are still pending for Type III and for Equipment Fault Current Interrupting Issues.  The Introduction and Conclusion also have not yet been written.

 

Ron Harley and Dustin Howard from Georgia Tech have done extensive modeling work for Type I machines.  Dustin presented the analysis and conclusions to the WG.  Analysis was similar to earlier presentations for Type II turbines.  Lab tests were performed on a 7˝ HP wound rotor motor using both time domain and sequence calculations.  PSCAD simulations were done for a 1.8 MW turbine.  Results for three phase faults and the faulted phase for line-to-ground faults provided quite good agreement on methods.  However, results for the unfaulted phases during line-to-ground faults were quite sensitive to negative sequence values and other parameters.  Charlie Henville suggested that generator per unit quantities also be presented to improve clarity.

 

There was a brief review of the new material in section 3.4 for the type 4 turbines.  It was discussed at that for the analysis of all types of turbine/generators that both faults on the generator terminals and the high side of the generator transformer should be discussed in the report.

 

The next Joint work group meeting will be at the PSRC meeting in Garden Grove, CA, January 9-12, 2012.  Requirements for this meeting will be: single session, room for 50 with a computer projector.

 

CTF3:   Joint meeting with Power System Stability Controls Subcommittee

Chair: C. Henville

Vice-Chair:-

Output: Proposals for working with Power System Dynamic Performance

Established: January 2010 Expected completion date:-

 

CTF3 met in Minneapolis with two members present.

 

A joint panel session with PSDP at the PES GM in July 2012 is now confirmed. Alex Apostolov will be the representative with Pratap Mysore being backup person.

 

The PSRC presentation will be `Protection issues during system restoration`, and will be based on the PSRC transactions paper that was published in 2005 but with updates with respect to changes in technology. These updates will not be published in the printed paper which will simply be the Transactions paper, but will be included in the presentation.

 

Some possible impacts of modern technology that are not fully discussed in the Transactions paper but could be included in the update are:

 

·         Alternate settings groups to be enabled during system restoration

·         Synchrophasors in synchronizing during system restoration

·         Modern frequency tracking capabilities during frequency excursions

·         Adaptive settings

·         Enhanced visibility due to monitoring capabilities of modern IEDs

In addition, outside the CTF3 meeting, discussions with Ken Martin led to the idea of proposing a panel session at the July 2013 PES general meeting to be sponsored primarily by the PSRC but with the cooperation of the PSPD on the new synchrophasor standard(s) and applications of synchrophasors for SIPS. This will be developed further at the January PSRC meeting.

 

 

CTF18:             Transmission to Generation Interconnection Protection Considerations

 

Chair: Alla Deronja                                                                            

Vice-Chair:-

Output: IEEE Guide

Established: September 2011

Expected completion date:- TBD

 

Task Force CTF18 met on September 14, 2011, in Minneapolis, MN, in single session chaired by Alla Deronja, with 30 people present.

 

The chair presented the task aiming at writing an IEEE Guide for the transmission to generation interconnections. This topic has not been rigorously approached by the industry yet. The purpose of the new Guide is driven by the fact that many power producers, being connected to the power grid, may fail to install the adequate protective equipment at the interconnection because of the limited expertise of their consultants or desire to decrease the cost of the facilities.

 

A discussion was followed to identify the potential conflicts with other working groups. The task force determined that there was no credible conflict between the present work and WG J3 (Power Plant and Transmission System Protection Coordination) and K4 (Revision of C37.95 Relaying of utility-consumer interconnections).

 

However, Gerry Johnson brought an issue with SCC21 IEEE P1547.5 Draft Technical Guidelines for Interconnection of Electric Power Sources Greater than 10MVA to the Power Transmission Grid, which appears to duplicate the effort of this task force. According to Gerry, this group’s work has been stalled for 6-7 years with no progress made, and their current PAR will expire soon. The plan is for Gerry and the task force chair to get in contact with P1547.5 chair and secretary to resolve this conflict before moving forward with this project.

 

The title for the future Guide, if cleared for progress, was approved to be IEEE Guide for Protection Systems of Transmission to Generation Interconnections. Also, the scope and purpose were proposed and discussed. They stand as follows at this time:

 

Scope:

This Guide contains information on recommended protection of transmission to generation interconnections.  It is intended to cover the protection system applications at the interconnections between the transmission systems and generation facilities.

This Guide is not intended to supplant specific transmission or generator owner practices, procedures, requirements, or any contractual agreement between the transmission and generator owners.

This Guide will be coordinated with IEEE Std. C37.95 IEEE Guide for Protective Relaying of Utility-Consumer Interconnections.

Purpose:

 

This document is intended to provide guidance to those who are responsible for the relay protection of electrical interconnections between transmission and generation facilities. 

 

Depending on the conflict resolution with P1547.5, a second task force meeting in January of 2012 is requested.

Requirements for the next meeting are as follows: single session, meeting room for 20-30 people with a computer projector.