电瓷避雷器Issue(1)：1-9,9.DOI:10.16188/j.isa.1003-8337.2026.01.001
基于附加电感零序电压型小电流接地系统故障选线策略
Fault Line Detection for Neutral Un-Effectual Grounded System Based on Zero-Sequence Voltage of Additional Inductor
摘要
Abstract
Because of the small magnitude of zero sequence current,success rate of the fault line selection for a neutral un-effectual grounded system,especially for arc suppression coil grounding system,cannot be guaranteed.Furthermore,fault line selection based on applied signals are vulnerable to transition re-sistance.To solve the abovementioned problems,a fault line selection strategy for neutral un-effectual grounded system based on zero-sequence voltage of additional inductor is proposed.By putting in the additional inductor of each line in turn after a single-phase to ground fault occurs on the line,the fault line is determined according to the change of zero-sequence voltage at the busbar,using a cyclic deter-mination method,and fault line detection is realized.The theoretical derivation and the simulation based on PSCAD/EMTDC show that the proposed line selection strategy only needs to collect the zero-se-quence voltage,which requires low measurement accuracy and can accurately and reliably determine the fault line under different grounding modes of the system,and is less affected by the transition resistance.关键词
小电流接地系统/单相接地故障/中性点接地方式/附加电感/零序电压/故障选线Key words
neutral un-effectual grounded system/single-phase grounding fault/neutral grounding method/additional inductor/zero-sequence voltage/fault line detection引用本文复制引用
郑小聪,解超,尹纯亚,张高航,杨宗蕾..基于附加电感零序电压型小电流接地系统故障选线策略[J].电瓷避雷器,2026,(1):1-9,9.基金项目
南方电网科研院科技项目(编号:SEPRI-K22B055),新疆维吾尔自治区自然科学基金资助项目(编号:2021D01C087).Project supported by Southern Power Grid Electric Power Research Institute(No.SEPRI-K22B055),Natural Science Foundation of Xinjiang(No.2021D01C087). （编号:SEPRI-K22B055）
