工矿自动化2018，Vol.44Issue(6)：57-63,7.DOI:10.13272/j.issn.1671-251x.2017070011
矿井供电系统单相接地故障零模特征仿真研究
Simulation research on zero-module characteristics of single-phase grounding fault in mine power supply system
摘要
Abstract
For poor actual protection effect of existing line selection methods based on characteristicquantity of single-phase grounding fault,a simulation model of mine power supply system was established in RTDS/RSCAD real-time digital simulation system taking an actual mine power supply system as research object.Fault characteristics laws of zero-module current and zero-module voltage of lines were analyzed under operation modes of ungrounded neutral and arc suppression coil grounded neutral.Influences of different fault location,initial phase angle of fault and grounding resistance on time domain characteristics of zero-module current were also researched under single-phase grounding fault of mine power supply system.The research results are as follows:① Influences of neutral point operation mode on zero-module current of non-fault line and zero-module voltage of bus can be ignored,but influence on zero-module current of fault line is greater.Polarities of the first half wave of zero-module current in fault line and non-fault line are opposite under the two operation modes.② The farther fault location away from the bus,the smaller impact value of transient zero-module current is.Fault location has less influence on steady-state zero-module current.③ The larger of the initial phase angle of fault,the larger the impact value of transient zero-module current is,the slower the impact value grows,and the shorter time reaching steady-state of transient zero-module current of fault line is.The initial phase angle of fault has no influence on amplitude of steady-state zero-module current,which only affects initial phase angle.④ The larger grounding resistance,the smaller impact value and its attenuation rate of transient zero-module current and amplitude of steady-state zero-module current are.关键词
矿井供电系统/单相接地故障/故障选线/中性点不接地/中性点经消弧线圈接地/相模变换/零模特征/时域分析Key words
mine power supply system/single-phase grounding fault/fault line selection/ungrounded neutral/arc suppression coil grounded neutral/phase-mode transformation/zero-module characteristic/time domain analysis分类
矿业与冶金引用本文复制引用
罗超,耿蒲龙,曲兵妮,宋建成,刘聚财,都志立,原磊明..矿井供电系统单相接地故障零模特征仿真研究[J].工矿自动化,2018,44(6):57-63,7.基金项目
国家自然科学基金资助项目(51377113,U1510112) （51377113,U1510112）
山西省科技重大专项项目(20131101029). （20131101029）
