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IEEE PES VANCOUVER CHAPTER DISTINGUISHED LECTURER TECHNICAL TALK ON “Sub-synchronous Currents Damage 500 kV Shunt Reactor”
August 14 @ 11:55 am - 1:00 pm
IEEE Power & Energy Society Vancouver Chapter is pleased to announce a distinguished lecture on “Sub-synchronous Currents Damage 500 kV Shunt Reactor” by Dr. Mukesh Nagpal. The chapter kindly invites all PES members and guests to attend this presentation. Please also feel free to extend this invitation to those who you think would be interested in this presentation.
This IEEE technical presentation hours may be considered towards Continuing Professional Development (CPD) credits.
Lecture Topic: Sub-synchronous Currents Damage 500 kV Shunt Reactor
Speaker: Dr. Mukesh Nagpal
Date: Wednesday, August 14th 2019
Time: 11:55 a.m. to 1:00 p.m.
Venue: Centre Room, Auditorium – BC Hydro Edmonds Office, 6911 Southpoint Drive, Burnaby, B.C.
WebEx information cannot be posted here and will be sent by email to our mail list as per updated IEEE rules. Please contact host for more details.
Synposis of the talk:
On March 31, 2019, a 500 kV air-core, shunt reactor at BC Hydro’s Mica generating station was severely damaged shortly after four unit transformers were simultaneously energized from a 500 kV series and shunt compensated line source. Forensic investigations revealed that the controlled switching system, controlling the instant at which each breaker phase closes during energization to minimize inrush current, had failed. Uncontrolled closing led to under-damped, high-magnitude and sub-synchronous currents; predominantly about 20 Hz ferro-resonant currents in transformers and about 9 Hz resonant currents in the air-core line shunt reactor. Protection tripped and isolated the four transformers, followed shortly by shunt reactor protection tripping. Before the reactor could be isolated by circuit breakers, a damaging internal fault developed. Deep understanding of the sequence-of-events and root cause of failure were crucial because they enabled safe re-energization of the generating station within in days of the event and in-turn alleviated system reliability and regulatory concerns while the plant was not available.
This presentation describes the sequence of events, presents forensic evidence to support conclusions made and shares valuable lessons learned on pitfalls of applying point-on-wave technology in a complex system.
Centre Room, Auditorium – BC Hydro Edmonds Office
6911 Southpoint Drive
Burnaby, British Columbia