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広域系統安定化システムの開発
◎森田 誠・林 卓矢・竹安孝年（関西電力）・黒瀬 健・荒巻卓男・門上敦史（三菱電機）
As a countermeasure against frequency and dynamic stability problem occurred by a large capacity generator’s drop, wide-area special protection system what is called the Block System Stabilizer (BSS) has been put into operation for about 40 years in the Kansai Electric Power Company. The conventional BSS has been updated as Bulk Power System Stabilizer. The new BSS is developed based on the concept of improving the fault detection function, corresponding to the change of power system configuration from radial to loop, and enhancing the human operational function.