【作者】 贾磊； 都洪基； 戴光武；

【Author】 JIA Lei DU Hong-ji DAI Guang-wu (School of Power,Nanjing University of Science & Technology,Nanjing 210094,China)

【机构】 南京理工大学动力工程学院；

【摘要】 目前,在国内中压电网运行中普遍采用的谐振接地方式,文中利用MATLAB SPS对输电线路、接地点、Z型变压器、消弧线圈进行建模,然后组成谐振接地系统的仿真模型,并在此模型的基础上给出一个35kV谐振接地电网单相接地故障的仿真算例,通过改变其中模块的参数来仿真分析电网在不同接地时刻的零序电流变化规律。仿真表明,谐振接地方式的基本运行特性明显优越。更多还原

【Abstract】 Today,the resonant earthed system currently used in medium voltage network of native power system is analyzed and simulated with the graphics simulating software MATLAB.The modules in the SimPowerSystems toolbox of MATLAB are used to build model,such as:circuitry,grounding spot,transformer,arc extinguishing coil.After building the mode of a 35kV resonant earthed system,the changing rules of zero sequence current in different time are analyzed and simulated,the conclusion is resonant grounded is a rather proper grounded mode.更多还原