特高压可控并联电抗器补偿度的研究

特高压远距离输电系统中,高速响应可控电抗器通过实现容量大范围内快速平滑可调和限制过电压等重要作用,很好地提高了输电电量和质量。笔者以线路分布参数和均匀传输线方程为基础,采用电力系统潮流计算方法,得到适用于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电压、传输功率之间的关系。为特高压可控电抗器的设计和控制提供了理论基础,有利于进一步研究安装可控电抗器的特高压输电线路的特性。

Research on Compensation Degree of UHV Controllable Shunt Reactor

In ultra-high voltage (UHV) long-distance power transmission systems,the controllable shunt reactor (CSR) with rapid response can improve transmission power and power quality by means of restricting over-voltage and changing power fleetly and smoothly.In this paper,a formula applicable to various loads for calculating compensation degree of CSR was derived by load flow calculation based on the distributed parameters of line and the equation of uniform transmission line.The relationships of compensation degree with voltage and transmission power were analyzed.The results may offer a theoretical reference for the design of UHV controllable shunt reactor and its control system,and facilitate the further study of characteristics of UHV transmission line with CSR.