Performance of the ±80MVA GCT STATCOM under commercial operation

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  • Performance of the .+-.80MVA GCT STATCOM Under Commercial Operation

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This paper presents a newly developed an 80MVA GCT STATCOM for the Kanzaki substation of the Kansai Electric Power Co., Inc. The commercial operation was started in June, 2004. The main purpose of the STATCOM is to maintain voltage during single circuit connection of source to the substation resulting from an AC system fault in order not to break down load system of the substation. The developed STATCOM has three distinctive features: (1) a high-efficient, compact and AC filter-less system using multistage three-level GCT converter and customized harmonics reduction PWM; (2) a coordinated voltage regulator with tap control of main transformers; and (3) a continuous operation from a single phase-ground fault through reclosing of the faulted circuit by limiter adjustments of the reactive current reference. This paper describes characteristics of the coordinated voltage control in the substation, and shows performance of the continuous operation during AC system faults using data of commercial operations and the simulation results.

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