500 kV电缆线路电压分布特性仿真分析  

Simulation Analysis of Voltage Distribution Characteristics of 500 kV Cable Line

作　　者：涂苏格 余艺娟 陈晨 陈洁 TU Suge;YU Yijuan;CHEN Chen;CHEN Jie(State Grid Hubei Transmission and Transformation Engineering Co.,Ltd.,Wuhan Hubei 430077,China)

机构地区：[1]国网湖北送变电工程有限公司,湖北武汉430077

出　　处：《湖北电力》2020年第3期60-64,共5页Hubei Electric Power

摘　　要：本文采用分布参数建立电缆等效模型,通过变频谐振交流耐压、雷电冲击、操作冲击试验仿真分析,仿真结果表明,变频谐振交流耐压试验中,随着电缆长度的增加,电缆电压呈略微增长趋势,但增长幅度不大;随着频率的升高,末端电压升高现象更为明显;随着试验电压的升高,末端电压呈线性升高,中间各节点呈现相同趋势。雷电冲击电压试验中,末端电压抬高2倍,中间各节点也都产生稍高的电压。操作冲击电压试验中,沿线各节点电压波形相似,均出现波形的畸变(除首端外)。In this paper,the cable equivalent model is established by using distributed parameters,and simulation analysis is carried out by frequency conversion resonance AC voltage withstand test,lightning impact test and switching impulse test.The simulation results are shown as follows:In the frequency conversion resonance AC voltage withstand test,as the length of the cable line increases,the cable voltage presents a slightly increasing trend,but not greatly;with the increase of frequency,the increase of terminal voltage becomes more obvious;as the test voltage rises,the terminal voltage increases linearly,and the intermediate nodes show the same trend.In the lightning impulse voltage test,the terminal voltage is raised twice,and the intermediate nodes also produce slightly higher voltage.In the switching impulse voltage test,the voltage waveform of all nodes along the line are similar,and waveform is distorted(except at the head end).

关 键 词：分布参数 变频谐振交流耐压 雷电冲击 操作冲击试验 

分 类 号：TM63[电气工程—电力系统及自动化]