基于PWM控制的动态无功补偿装置研究

摘要

This paper designed a kind of dynamic reactive power compensation device based on pulse width modulation （PWM） con- trol. This static var generator （SVG） took DSP TMS320F2812 as the control core, six insulated gate bipolar transistors as the main circuit of inverter, including signal acquisition and processing circuit. Voltage and current 2-ring control strategy was adopted, which could not only provide reactive power for the supply system, but also absorb reactive power from it, so as to achieve the purpose of dynamic reac- tive power compensation. The related technologies of power electronics converter was used to establish the mathematical model of the device. Via practical experiments of three-phase pulse width modulation （PWM） rectifier, the dynamic performance of its control system was analyzed to obtain the related parameters.%设计了一种基于脉宽调制控制的动态无功补偿装置，该装置以DSP TMS320F2812为控制核心，由6个绝缘栅双极型晶体管构成逆变主电路，外加信号采集与处理等电路共同组成静止无功发生器，采用电压和电流双环控制策略既可以向供电系统提供无功，又可以从中吸收无功，从而实现动态无功补偿的目的。利用电力电子变流相关技术，建立装置的数学模型，通过三相PWM整流装置的实际试验，对控制系统进行动态性能分析并得出系统相关参数。