南方电网技术2024，Vol.18Issue(11)：58-66,9.DOI:10.13648/j.cnki.issn1674-0629.2024.11.007
基于暂态零序导纳值的谐振接地系统单相接地故障选线方法
Single-Phase Grounding Fault Line Selection Method for Resonant Grounding System Based on Transient Zero-Sequence Admittance Value
摘要
Abstract
The zero-sequence characteristic difference between faulty line and healthy line is weakened by resonant grounding system,so a line selection method based on transient zero-sequence admittance is proposed in this paper.Firstly,the transient zero-sequence admittance formulas of faulty line and healthy line under single-phase grounding fault are deduced theoretically,and the characteristic differences between them are compared.On this basis,a single-phase grounding fault line selection method based on the maximum mean value index of transient zero-sequence admittance is constructed.Finally,based on PSCAD/EMTDC software,the performances of the proposed method are verified and tested comprehensively.The results show that proposed method has the advantage of strong resistance tolerance to the transition resistance.Only the transient zero-sequence admittance in half power frequency cycle after the fault needs to be calculated,so the calculation load is small,the speed is fast and the implementation is easy.At the same time,the line selection accuracy is still high under the interference factors such as noise interference,current transformer reverse connection,the changes in network topology,line parameters and sampling frequency.关键词
单相接地故障/故障选线/暂态零序导纳/谐振接地系统Key words
single-phase grounding fault/fault line selection/transient zero-sequence admittance/resonant grounding system分类
动力与电气工程引用本文复制引用
吴江雄,郑茂然,王欣,李海锋,罗会洪..基于暂态零序导纳值的谐振接地系统单相接地故障选线方法[J].南方电网技术,2024,18(11):58-66,9.基金项目
国家自然科学基金资助项目(51977080) （51977080）
广东省基础与应用基础研究基金项目(2023A1515011035) （2023A1515011035）
广西电网有限责任公司科技项目(GXKJXM20222111). Supported by the National Natural Science Foundation of China(51977080) （GXKJXM20222111）
the Basic and Applied Basic Research Fund Project of Guangdong Province(2023A1515011035) （2023A1515011035）
the Science and Technology Project of Guangxi Power Grid Co.,Ltd.(GXKJXM20222111). （GXKJXM20222111）
