现代电子技术2025，Vol.48Issue(10)：135-141,7.DOI:10.16652/j.issn.1004-373x.2025.10.021
基于模型辨识的灵活接地有源配电系统故障选线算法
Flexible grounding active distribution system fault line selection algorithm based on model identification
摘要
Abstract
In allusion to the fault line selection problem of flexible grounding distribution system with distributed generation,a line selection algorithm using transient zero-sequence network model identification is proposed.The transient zero-sequence network composed of the initial energy storage discharge of the arc suppression coil after the small neutral resistance is put into operation is established.The change rule of the main frequency of the transient process and the time domain model of the transient current of the sound line and the faulty line are analyzed.The transient main frequency current of any sound line is linearly expressed by the first derivative of the transient zero-sequence voltage and its own capacitance to the ground,that is,the sound line equivalent is equivalent to a capacitance model.In comparison with the sound line,the linear expression of transient zero-sequence voltage and transition resistance are added to the fault line.Based on the line capacitance model,the transient current of each line is calculated by means of the transient zero-sequence voltage and the capacitance parameters of each line.Theoretically,the calculated transient current is consistent with the actual measured current,which indicates that the actual line is a capacitance model and is judged to be a sound line.Otherwise,it is judged as a fault line.The fault line selection criterion is constructed based on the difference between the transient calculation current and the measured current.Matlab simulation software is used to verify the applicability of the scheme in different transition resistance,fault location and other fault situations.The simulation results verify the feasibility of the proposed method.关键词
灵活接地系统/有源配电系统/单相接地故障/暂态电压/模型辨识/故障选线Key words
flexible grounding system/active distribution system/single-phase ground fault/transient voltage/model identification/fault line selection分类
信息技术与安全科学引用本文复制引用
孙舒熳,孙哲彬,田毅帅,李玲陶,邬超慧,邵文权..基于模型辨识的灵活接地有源配电系统故障选线算法[J].现代电子技术,2025,48(10):135-141,7.基金项目
内蒙古电力(集团)有限责任公司科技项目(NJ-GKCG-2024-ZNPWB-0401-0028) （集团）
