无功功率补偿装置安装位置节电效果分析

摘要

介绍了电容器无功功率补偿的种类。以太原煤气化晋阳选煤厂供电系统为例，分析了补偿前、集中补偿、就地补偿无功电流在线路上的流动情况，并对该厂无功功率集中补偿装置改造前后的节电效果进行了比较。指出采取补偿后，只是线路上流动的无功功率减少了，即线路的功率因数提高了，实际上，补偿前后负载取用的有功和无功并没有任何改变。无功功率补偿的是补偿电容器安装以前的线路，无功功率补偿电容器安装的位置越接近负载线路末端，线路的电能损失越少，节电效果越明显。%Introduces the type of capacitor reactive power compensation.Takes the power supply system in Jin-yang coal preparation plant of Taiyang coal gasification as example,analyzes the reactive current flow in the wire be-fore compensation,concentrated compensation and local compensation,and compares the energy-saving effect before and after the reactive power centralized compensation device in the plant transformed.Pointed out after compensation, just reactive power flowed on the line is reduced,that is line power factor is improved,in fact,load used active and reactive power before and after compensation has not changed.Reactive power compensation is the line before the ca-pacitor installed,the location of reactive power compensation capacitor installing is closer to the load line end,the power loss of the line is less,and power saving effect is more obvious.