柱上変圧器の励磁電流高調波に同期した高調波注入による単独運転防止方式の実験的検証

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2013/01/01

タイトル(英語): Experimental Study of Islanding-Prevention Method by Harmonic Injection Synchronized to Exciting Current Harmonics of Pole Transformer

著者名: 吉田　義昭（同志社大学 理工学部），鈴木　宏和（東京大学大学院 工学系研究科 電気系工学専攻），藤原　耕二（同志社大学 理工学部），石原　好之（同志社大学 理工学部）

著者名(英語): Yoshiaki Yoshida (Faculty of Science and Engineering, Doshisha University), Hirokazu Suzuki (Department of Electrical Engineering & Information Systems,School of Engineering, The University of Tokyo), Koji Fujiwara (Faculty of Science and Engineering, Doshisha University), Yoshiyuki Ishihara (Faculty of Science and Engineering, Doshisha University)

キーワード: 柱上変圧器，単独運転防止，高調波同期注入，高調波電圧検出，太陽光発電システム　　pole transformer，islanding-prevention，synchronized injection of harmonic currents，harmonic voltage detection，photovoltaic system

要約(英語): When distributed generators (DGs) such as photovoltaic (PV) systems spread widely in distribution systems, it is important to quickly prevent islanding operation caused by power system fault in order to ensure electrical safety. So far, the various islanding protection methods have been used practically. But, the conventional active systems tend to increase the detection time, because mutual interference occurs due to asynchronous state between active signals. On the other hand, the new active islanding detection system that is called “frequency-feedback system with step-injection”, also has possibility of extending the detection time in so called non-detection zone. So, we propose a novel islanding-prevention method by harmonic injection synchronized to exciting current harmonics of the pole transformer. We have carried out the experimental study by using the prototype inverters equipped with the proposed method. We were able to show the feasibility of detecting the islanding-operation quickly and reliably, even if the islanding state is in non-detection zone. According to the experimental results, it was demonstrated that mutual interference does not occur due to synchronous state between active signals, and also shown that the proposed method is applicable to the islanding detection system under clustered installation of PV systems.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.133 No.1 （2013） 特集：平成24 年電力・エネルギー部門大会

本誌掲載ページ: 79-90 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/133/1/133_79/_article/-char/ja/