An evaluation of a thyristor controlled phase angle regulator application in the Minnesota Power Transmission System. Final report
- Minnesota Power and Light Co., Duluth, MN (United States)
- Ontario Hydro, Toronto, ON (Canada)
In many cases, FACTS (flexible ac transmission system) is a technically and economically viable alternative to improve use and control of existing transmission systems. This study investigates the technical merits of applying a thyristor controlled phase angle regulator (TCPAR) in the Minnesota Power-to-Ontario Hydro 115-kV intertie. The project team first identified options that could provide the necessary control-TCPARs and high-voltage direct current (HVDC). Due to the high cost of the HVDC option, only the FACTS device alternative was considered further. By examining various circuit configurations, the team attempted to identify the least-cost TCPAR hardware option that would meet their needs. A TCPAR hardware conceptual design was completed, and a preliminary economic assessment was performed. Results of the initial investigation and system studies indicate that a single-tank, single-core TCPAR design with a minimum number of thyristors would provide acceptable transient performance at minimum cost. Improvement in system transient response due to TCPAR control would provide an additional 50 MW of transfer capability between Minnesota Power and Ontario Hydro and would increase stability on parallel corridors. As little as {plus_minus}10 degrees of rapid phase angle regulation would be required to improve system transient response and transfer capability. Moreover, a delay of up to 800 ms would be allowable in responding to significant disturbances.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States); Minnesota Power and Light Co., Duluth, MN (United States); Ontario Hydro, Toronto, ON (Canada)
- Sponsoring Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 10168207
- Report Number(s):
- EPRI-TR-101932; ON: UN93015834
- Resource Relation:
- Other Information: PBD: May 1993
- Country of Publication:
- United States
- Language:
- English
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