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This paper describes synchronized injection method of distributed inter-harmonic currents, and inspection of new islanding operation detection method for clustering installation as its application. If small distributed generators (DG) interconnected with low voltage system are installed under clustering, when a intersystem fault occur between high and low voltage grid, islanding phenomena will pose a problem. The following methods are conventionally considered as a measure.(1) Method by distribution system facilities(2) Application of conventional islanding detection method (indirect detection of earth fault)However, the subject of maintenance of a system occurs by (1). The subject to which detection time becomes long depending on system conditions can be considered by (2). Then, in order to solve these subjects, we developed this new method.

denki gakkai rombunshi. b, denryoku, enerugi bumonshi/denki gakkai rombunshi. b, denryoku, enerugī bumonshi

Synchronized Injection Method of Distributed Inter-Harmonic Currents and its Application to Detection of Islanding Operation under Clustering Installation of Distributed Generators