固有過渡回復電圧測定時の電流計測

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: 2020/09/01

タイトル(英語): Current Measurement at Prospective Transient Recovery Voltage Measurements

著者名: 野中　強也（東京電機大学 工学研究科 電気電子工学専攻），腰塚　正（東京電機大学 工学研究科 電気電子工学専攻），日髙　邦彦（東京電機大学 工学研究科 電気電子工学専攻）

著者名(英語): Kyoya Nonaka (Tokyo Denki University), Tadashi Koshizuka (Tokyo Denki University), Kunihiko Hidaka (Tokyo Denki University)

キーワード: シャント，計器用変流器，短絡試験　　shunt，current transformer，short circuit testing

要約(英語): Current transformers (CT) are used to measure the current in power transmission systems. Generally, the CT has an iron core. It is well known when the iron core saturates, the output signal of the CT is distorted in the commercial frequency. In short circuit testing for circuit breaker, when the prospective transient recovery voltage is measured, the CTs for high frequency measurement are often used to measure the interrupting current. However, it is not known the influence of the CT characteristics to the current measurements, for example di/dt and so on. In this paper, points to be noted at the current measurements in short circuit testing are discussed. Current was measured by shunt resistance and CT simultaneously. It was found that there is the difference of the shunt and CT output. Impedance and phase angle of high frequency CT were measured by frequency response analysis. Equivalent circuit of the CT is constructed from the results. The maximum value and di/dt of the CT output were smaller than the true current of the circuit by calculations using the equivalent circuit of the CT.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.140 No.9 （2020）

本誌掲載ページ: 700-704 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/140/9/140_700/_article/-char/ja/