配电线路的电容补偿分析与讨论

为了降低10 kV配电线路的线损,安装电容器可达到节能的目的。通过对在线路上安装电容器组前后的线损情况进行分析后表明,安装电容器后可以大幅度减少无功电流在线路上的流动,降低了线路损耗,节能效果十分显著。文中的线损降低率η与无功补偿度K、长度比L之间的关系式以及电容器补偿量和安装位置的选取、无功补偿量的调节和控制、关口表功率因数示值与降损的关系等均可为线路无功补偿装置的设计和运行提供参考。

Analysis and Discussion of Capacitor Compensation for Transmission Lines

In order to reduce the loss of 10 kV distribution line and achieve the goal of power saving,by analyzing and comparing the power losses of transmission lines with and without capacitor compensation,it is concluded that installing capacitors in the transmission system may reduce the reactive current through the transmission lines and which cut down the power losses apparently.All the data,equations and results in the paper may be used as the reference for design and operation of the reactive compensation devices for transmission lines,e.g.the equation relating the reduction rate of line losses η,the reactive power compensation degree K and the length ratio L,the capacity and location design strategy for capacitor compensator,the regulation of the compensation amount and the relation between power factor readings of electricity meter and the line losses.