电力系统自动化2016，Vol.40Issue(22)：93-99,146,8.DOI:10.7500/AEPS20160315016
基于同步量测的谐振接地系统高阻接地故障区段暂态定位
Synchronous Measurement Based Transient High Resistance Earth Fault Location in Resonant Grounding System
摘要
Abstract
High resistant earth fault occurs frequently in resonant grounding systems,and is difficult to detect.The existing transient analysis and transient faulty section location method is not suitable for high resistance earth fault.The unique role of parallel resonance between Peterson coil and system capacitance to ground is used.The variation laws of zero-sequence current, zero-sequence voltage and their transient components are analyzed in under-damping and over-damping resonant processes.The facts can be observed in this study that the transient currents of downstream fault points of detecting point are approximately orthogonal to the transient zero-sequence voltage,and the transient currents of upstream fault points of detecting point include transient current at the fault point proportional to the magnitude of the transient voltage.The fault information collected by the synchronous measurement unit is used to calculate the proj ection components of transient current on transient voltage in every detecting point.If the difference in current proj ection magnitudes between two adj acent detecting points is larger than the preset number,this section could be located as the fault section.Otherwise,the downstream last detecting point is the fault section.The proposed method is intended to perfect the fault transient analysis and faulty section location technology in non-solidly earthed network.The feasibility of the method is verified by simulation.关键词
谐振接地系统/高阻接地故障/故障区段定位/投影变换/暂态分析/同步量测Key words
resonant grounding system/high resistance earth fault/faulty section location/proj ection transformation/transient anlaysis/synchronous measurement引用本文复制引用
陈筱薷,薛永端,王超,徐丙垠,黄仁乐,程林..基于同步量测的谐振接地系统高阻接地故障区段暂态定位[J].电力系统自动化,2016,40(22):93-99,146,8.基金项目
国家自然科学基金资助项目(51477184) （51477184）
国家高技术研究发展计划(863计划)资助项目(2014AA051901) （863计划）
国家电网公司科技项目(52130416000D)。 （52130416000D）
