摘要
基于1 000 kV双端电源输电线路模型,利用EMTP仿真计算加装HSGS前后潜供电流的变化情况。研究表明,采用HSGS限制潜供电流的方法适用于较短的、不需要高抗补偿和换位的线路,一般要求200 km以内。HSGS的接地电阻对HSGS限制潜供电流效果的影响很大,应该小于0.5Ω。并分析了HSGS的接地电阻大于1.5Ω时,150 km线路两端的潜供电流比加装前大的现象。对不同长度的装有HSGS的线路分别仿真可知,线路越长,潜供电流和恢复电压的值越大。
The model of 1000 kV transmission line with two sources is established,based on which the secondary arc currents are calculated with EMTP for that with and without the HSGS.It shows that the HSGS is feasible for a shorter line which need not shunt reactor and transposition,generally shorter than 200 km.The grounding resistance of HSGS influences obviously the limiting effect of HSGS,and it should be set at less than 0.5 Ω.Then the phenomenon that the secondary arc current increased after using HSGS with a resistance bigger than 1.5 Ω on sides of the 150 km line is discussed.Simulations are carried out for lines with different length,which shows that,the longer the line with HSGS is,the bigger the secondary arc current and recovery voltage will be.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第6期52-55,共4页
Power System Protection and Control
关键词
特高压
仿真
潜供电流
快速接地开关
重合闸
ultra high voltage
simulation
secondary arc current
high speed grounding switch
single phase reclosure
