次数間高調波注入による22, 33kV用単独運転検出装置の開発

抄録

This paper describes the development of the new islanding preventive device using interharmonic current injection method for 22kV or 33kV electric power system interconnection and the demonstration test results at Akagi Test Center of CRIEPI. The islanding preventive device using interharmonic current injection method is limited for 6.6kV electric power system interconnection use, because the impedance of a 22kV or 33kV electric power system is too small for the device to detect the islanding phenomena of the 22kV or 33kV electric power system. We have developed the new islanding phenomena detection methods. These methods are composed of the noise elimination technique using digital filter and the small-sized technique using more than one interharmonic.