ROTATING
MACHINERY PROTECTION SUBCOMMITTEE
MAY 2003
Meeting Minutes –
Chair: S.P. Conrad
Vice Chair:
J1: Revision of C37.106-1987 Guide for
Abnormal Frequency Protection for Power Generating Plants
Chair:
Vice Chair:
The Working Group met with 5 members and 5 guests.
Announcement was made by the Chair that the last draft balloted has been sent to the Standard Department for the final edition of the document. We are still awaiting the identification of the editor assigned to this task.
J3: Protection
of Generators Interconnected with Distribution System
Chair: E. Fennel
Vice Chair:
The Working Group met with 11 members and 15 guests.
The Working Group reviewed the writing assignments that were prepared since the last meeting. Additional writing assignments were accepted by several WG members.
One particular emphasis of the paper will be how the operation of the distribution system effects the protection of the interconnected generators.
J4: Revision
of C37.102 AC Generator Protection Guide
Chair:
Vice Chair:
The Working Group met with 13 members and 6 guests.
The Chair distributed draft #2 of the document. The WG reviewed the document and as a result additional writing assignments were made.
The plan is to send the revised document for comments from the WG and Subcommittee by September 2003. Balloting of the document is planned for May 2004
J5: Generator
Protection Setting Criteria
Chair:
Vice Chair:
The Working Group met with 8 members and 8 guests.
The
transient stability section of the paper was dropped to keep the paper to about
10 pages. The paper will be tutorial in
nature to try to complement the efforts of WG J-4 (C37.102 revision) that also
addresses relay setting criteria. The
title of the paper was changed to better reflect its content. The new title will be “Coordination of
Generator protection with generator AVR Control and Machine Capability.”
Assignments:
1.
2.
3.
Shoukat Khan will rewrite Section III
using the example generator and add a section on coordinating the 21 relay
setting with generator capability.
4.
5.
6.
J6: Performance
of Generator Protection During System Disturbances
Chair:
Vice Chair:
Working Group met with 5 members
and 3 guests.
Minutes from previous meeting were approved. Minor editorial wording changes in document were discussed.
J7: Revision
of C37.101, Generator Ground Protection Guide
Chair:
Vice Chair:
The Working Group met in a single session with 9 members and 8 guests.
The Chair opened the meeting and distributed draft #2 to all attendees. The WG reviewed the documents and have the following comments for the new draft:
1. Use C37.100, C37.2 and IEEE dictionary instead of IEEE Std. 100-1992.
2. Table #1 requires revision
3. Some
figures require correction (sent to
4. Figure
18.e will be reviewed by
5. Figure 18.f (ABB’s injection scheme will be added
6. Figures 20, 23a, 23b and 23 c will be revised (PT connections to be grounded wye)
7.
8.
9. Add device 64G in Section 9
10. Scan the CT excitation curve (Figure B.2)
11. Put drafts “unapproved” designation on each page
Assignments are due to the Chair by
JTF1: VFD
Protection Issues Related to Motors
Chair:
Vice Chair:
The Working Group met in a single session with 15 attendees, with 9 individuals indicating interest in becoming members.
The discussions during the meeting centered around how to gain knowledge and understanding of variable frequency drives and connected motors, from both the operational characteristics and embedded protective functions in the drive’s control perspectives. The TF decided that an attempt would be made to gain this knowledge by bringing in drive manufacturers and other knowledgeable parties to help technically educate us in these areas. Additionally, technical literature from these manufacturers will be obtained by the members associated with these manufacturers.
The TF recommends that we maintain this TF until a more detailed approach to address the topic wit regard to proper protection is established and defined.
Liaison Reports
Electric Machinery Committee
“No Activity” report. This committee meets at the PES Summer
Meeting.
Coordination Reports
P958-EDPG, Guide for
Adjustable Speed Drives
In discussion with
1. Draft #7 had a successful IEEE ballot during last year
2.
3.
4. I
e-mailed
P408-NPEC, Standard Criteria
for Class 1E Power Systems for Nuclear Power Generating Stations
IEEE Std. 741, “Protection of Class 1E Equipment and Systems” was reaffirmed by the balloting pool, as reported at the September 2002 meeting of the NPEC. Two negative ballots were received, and they were withdrawn, and the Standard will address the issues raised at the next revision. The PSRC should take a closer look at the Standard as it covers rotating machines and degraded grid voltage protections in this Standard.
P1010, Guide for Control of
Hydroelectric Power Plants
“No Activity”
report. P1010 has received 4 minor
comments from