Faulted Feeder Selection Based on Active Harmonic Injection of CIDGs for Small Current Grounding System

Jinglei Deng; Liangzhong Yao; Jian Xu; Ming Wu; Fan Cheng

doi:10.17775/CSEEJPES.2024.07690

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Faulted Feeder Selection Based on Active Harmonic Injection of CIDGs for Small Current Grounding System

Regular Papers | 更新时间：2026-06-12

- Faulted Feeder Selection Based on Active Harmonic Injection of CIDGs for Small Current Grounding System
- CSEE Journal of Power and Energy Systems Vol. 12, Issue 3, Pages: 1234-1251(2026)
- 作者机构：
  
  1. School of Electrical Engineering and Automation, Wuhan University,Wuhan,China
  2. Hubei Engineering and Technology Research Center for AC/Dc intelligent Distribution Network, Wuhan University,Wuhan,China
  3. China Electric Power Research Institute,Beijing,China
  4. Center for Strategic Studies, Chinese Academy of Engineering,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2024.07690
  CLC：
- Published：2026
- 稿件说明：
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Jinglei Deng, Liangzhong Yao, Jian Xu, et al. Faulted Feeder Selection Based on Active Harmonic Injection of CIDGs for Small Current Grounding System[J]. CSEE Journal of Power and Energy Systems, 2026, 12(3): 1234-1251.
DOI：

Jinglei Deng, Liangzhong Yao, Jian Xu, et al. Faulted Feeder Selection Based on Active Harmonic Injection of CIDGs for Small Current Grounding System[J]. CSEE Journal of Power and Energy Systems, 2026, 12(3): 1234-1251. DOI： 10.17775/CSEEJPES.2024.07690.

摘要

Abstract

When a single-line grounding (SLG) fault occurs in a small current grounding system (SCGS)

the weak fault characteristics pose a challenge to the fault line selection (FFS). To improve the reliability of FFS

a new FFS method based on harmonic active injection of converter interfaced distributed generator (CIDG) is proposed in the paper. First

by analyzing the distribution law and attenuation characteristics of the harmonic current actively injected by CIDG in the system

the active injection characteristic harmonic current signal that can meet the needs of FFS is selected

and then

a characteristic harmonic current signal injection method based on CIDG active control is designed. On this basis

an FFS method based on the amplitude-phase relationship of harmonic current is proposed

enabling the method to simultaneously meet the requirements of fault line selection and phase selection requirements. PSCAD/EMTDC simulation analysis verifies the effectiveness and superiority of the proposed method compared to existing methods.

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