低压连续无功补偿装置应用研究

Application of Low-voltage Reactive Power Compensation Device

企业用电设备的不断增加,大量无功负载给企业电压产生了较大的影响,低功率因数问题较为突出,电能质量不高,给企业造成了经济损失。而无功补偿装置在供电系统中的作用是提高电网的功率因数,降低供电变压器及输送线路的损耗,提高供电效率,改善供电环境,因此如何合理的选择补偿装置,减少线路损耗,提高电网质量,对企业来说非常关键。本文设计了一套混合式连续的无功补偿装置,通过一个可调电压源和电容器组串联并入电网,另外两组采用的固定电容器组直接投切的方式,实现在380V低压电网上产生连续的无功。该无功补偿装置在实际中进行了应用,功率因数达到0.95以上,现场采集的数据均满足设计要求。

Along with the increasing number of electricity‐consuming equipment ,enterprises power voltage is facing great challenge .Enterprises suffer from loss caused by low voltage and poor power quali‐ty .Reactive power compensation device improves the power factor of the grid ,cuts down loss in power supply transformer and power lines .It also improves power supply condition .The paper designs a low‐cost yet highly practical continuous mixing reactive power compensation system which improves system power utility .The device contains a group of capacitor lined with an adjustable voltage source and two sets of capacitor groups .The system has been used in practice .When power factor is above 0 .95 ,the collected data meet the design requirements .