三相交流電流センサのゲイン異常検出手法

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2023/06/01

タイトル(英語): Gain Fault Detection Method for 3-phase AC Current Sensors

著者名: 田中　秀明（（株）日立製作所 研究開発グループ），秋田　佳稔（（株）日立製作所）

著者名(英語): Hideaki Tanaka (Research & Development Group, Hitachi, Ltd.), Yoshitoshi Akita (Hitachi, Ltd.)

キーワード: 交流電流センサ，センサ異常，ゲイン異常，異常検出，冗長性，不平衡負荷　　AC current sensors，sensor fault，gain fault，fault detection，redundancy，unbalanced load

要約(英語): This paper proposes a novel method for detecting the gain fault of 3-phase AC current sensors in power electronics systems. In conventional methods, the sensor gain fault is detected by comparing the RMS values of the detection current of each phase. However, for an unbalanced three-phase load, a higher current will flow in the phase with the lower impedance, which causes misdiagnoses. In contrast, the proposed method utilizes the product of the detection current in each phase and sum of the detection current as part of the abnormality calculation (gain error calculation) of each current sensor, which can reduce calculation errors caused by an imbalance in the three-phase load. Simulation results show that the method can calculate the abnormality of the sensors with small error even if there is an imbalance in the three-phase load. Moreover, simulation results under conditions of varying current amplitude and frequency indicates that the method can detect sensor faults under transient conditions.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.143 No.6 （2023） 特集：2022年産業応用部門大会

本誌掲載ページ: 455-463 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/ieejias/143/6/143_455/_article/-char/ja/