小电阻接地系统电弧故障试验及其系统级参数优化仿真  

Experiment and System-Level Parameters Optimization of Arc Fault in 10 kV Low-Resistance Grounding System

作　　者：黄立新[1] 黄宝富 

机构地区：[1]长沙电力职业技术学院.长沙410131 [2]钦州鑫源电力设计有限责任公司,广西钦州535000

出　　处：《电瓷避雷器》2012年第6期107-110,共4页Insulators and Surge Arresters

摘　　要：通过一次10 kV配电网单相短路试验,获得并分析了与理想电弧有别的实际接地电弧伏安特性,验证了小电阻接地系统对弧光接地过电压的抑制作用。为能在时域条件下较准确地描述该实际电弧,对Mayr电弧模型进行了变换和改进。利用PSCAD/EMTDC中的多重仿真功能获得了短路稳态情况下的最优电弧参数,并对整个实验模型进行仿真。仿真结果证明,该方法能快速地进行系统级电弧参数优化,同时保证了优化结果与实验结果的低误差率,具有良好的工程指导意义。A single-phase short circuit test of 10 kV distribution network is conducted;the fault result and arc characteristic,which different from the ideal arc,is analyzed,and it is verified that the LRG system has restraint effect for arc overvoltage.In order to accurately describe the actual arc features in time domain conditions,the Mayr arc model is transformed and improved.The Multiple Run function in PSCAD/EMTDC is used to get the best fit parameters of the arc model,and the whole system simulation is made,which proves that this method could rapidly make the optimization,control the inaccuracy rate,and has the good engineering significance.

关 键 词：小电阻接地 单相短路 弧光过电压 电弧 PSCAD EMTDC 

分 类 号：TM862[电气工程—高电压与绝缘技术]