基于PWM的无功补偿系统设计

随着功率因数低的工业用电设备接入电网中,对电力系统运行稳定性和电压质量提出了更高的要求。文中基于无功补偿的原理,并设计了PWM连续调容的动态无功补偿系统,该系统克服了传统无功补偿器用感性无功覆盖容性无功,以产生可调容性无功的调节方式存在的不足,改进了现有无功补偿系统只能分组分级投切,不能连续调容的现状。能够快速跟踪负载变化,实时补偿无功功率,稳定电网电压,提高功率因数。

PWM-Based Reactive Power Compensation System Design

With the development of modern industry,more and more industrial electrical equipment with low power factor are connected to the power grid,which puts forward higher requirements for the stability of the power gird and the voltage quality.Based on the principle of reactive power compensation,this paper research and design a reactive power compensation devices of continuously varying capacitance with the principle of PWM.The compensator overcome the traditional device's disadvantage that use perceptual reactive cover capacitive reactive to produce adjustable capacitive reactiveand improve the status that existing reactive power compensation devices can only cast slice grouping-and-grading and don't have the ability of continuously varying capacitance of capacitors,it can track the load variation quickly,compensate the reactive power in real time,stable the voltage of power grid,and increase the power factor.