计及损耗的特高压输电线路中可控电抗器补偿度研究  

Research on Compensation Degree of Controllable Shunt Reactor Installed in UHV Transmission Line with Loss Considered

作　　者：张友鹏[1] 杜斌祥[2] 田铭兴[1] 

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]山东电力集团公司德州供电公司,德州253000

出　　处：《高电压技术》2011年第9期2096-2101,共6页High Voltage Engineering

基　　金：甘肃省自然科学基金(096RJZA092);甘肃省科技厅基金(619009)~~

摘　　要：高速响应可控并联电抗器装设于特高压交流输电线路,能够实现大范围快速平滑地调节容量和限制过电压等作用,从而提高输电电量和质量。为研究可控电抗器的补偿度以及其与线路特性的关系,建立计及损耗并精确考虑线路分布参数特性的特高压输电线路∏形等值电路,以均匀传输线方程为基础,采用电力系统潮流计算法得到适用于受端系统各种负载类型的可控电抗器补偿度公式。分析了可控电抗器的补偿度与线路传输功率、首末端电压、线路长度等之间的关系。分析结果表明:当特高压交流输电线路传输的有功功率一定且受端系统负载类型呈感性时,线路受端系统的功率因数越低,电抗器的补偿度越低;而受端系统负载类型呈容性时则与之相反。该研究为特高压可控并联电抗器控制系统的设计提供了理论基础,有利于进一步研究装设可控并联电抗器的特高压输电线路的特性。In the ultra-high voltage（UHV） transmission systems,controllable shunt reactor（CSR） with high-speed response can improve the transmission power and power quality by means of restricting the over-voltage and changing the power fleetly and smoothly.In order to research the compensation degree of CSR and its relation with characteristics of UHV line,on the basis of equations of uniform transmission line and ∏-type equivalent circuit of UHV line with distributed parameters considered accurately,the formula for calculating compensation degree of controllable shunt reactor which is applicable to various loads of receiving system is achieved by power flow calculation.The relationships of compensation degree,transmission power,voltage and length of the line are analyzed.For example,when transmission power of UHV transmission line is fixed and the load of receiving-end is inductive,the lower the power factor is,the lower the compensation degree is.But the situation is contrary when load of receiving-end is capacitive.The results provide a theoretical foundation for designing the control system of UHV controllable shunt reactor.

关 键 词：特高压 分布参数 等值电路 可控并联电抗器 无功功率 潮流计算 补偿度 

分 类 号：TM47[电气工程—电器]