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July 29, 2013

Mtg: PG&E 500 kV Series-Compensated Transmission Line Relay Replacement: Design Requirements and Testing

by @ 10:03 am. Filed under ALL, Electrical/Power

THURSDAY August 22, 2013
SF Power & Energy Chapter
Speaker: Davis Erwin, PE, System Protection, Pacific Gas & Electric Company
Time: Networking and light lunch at 11:30 AM; Presentation at 12:00 Noon
Cost: none, for IEEE Members; $5 for Non-members
Place: Pacific Gas & Electric, Room #305, 77 Beale Street, San Francisco
RSVP: by August 20 to Charles Mee,, 415-703-1147

Pacific Gas and Electric Company (PG&E) owns an extensive 500 kV series-compensated transmission line network.  The availability of this network is critical to serving Northern California loads and regional power transfers from the Pacific Northwest to Southern California.  PG&E identified six transmission lines requiring immediate replacement of faulty solid-state relay systems with modern, more reliable microprocessor-based relay systems to improve the reliability and maintain maximum availability of the 500 kV transmission system.
This talk describes the PG&E design philosophy of the 500kV transmission line relay systems and the protection challenges of seriescompensated transmission lines operating in single-phase tripping and reclosing modes.  In addition, it describes the relay system settings considerations and their validation using a Real Time Digital Simulator (RTDS®).  The paper demonstrates the analysis of RTDS results and the benefits derived during the engineering and commissioning stages of the project.

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