【摘要】 利用Π型网络等值长距离输电线路,推导了频域下考虑线路分布电容,电源侧分布电容,串补电容,母线电容及并联电抗器时线路故障暂态分量的表达式,讨论了它们各自对故障暂态分量的影响,同时分析了在不同故障类型情况下,故障点两侧暂态分量的特征。最后利用ATP仿真软件对一500 kV系统进行了仿真,利用快速傅立叶(FFT)进行频谱分析,验证了理论分析的正确性。更多还原

【Abstract】 The transient of long distance transmission lines is more complex than that of short lines,this paper utilizes equivalent Π-network to express long transmission lines,the computing formula in frequency domain is deduced considering distributed capacitance of lines and source,series-compensated capacitance,bus capacitance and shunt reactor.It also discusses their influence respectively and analyses the characteristic of fault transient component at both sides of fault point in different fault types.The results have been proven by ATP procedure in a typical 500-kv power transmission line.更多还原