斩波串级调速系统逆变器改造的仿真研究

Simulation Study for the Inverter Improvment of the Chopped-wave Cascade Speed Regulation Driver

三相电压源型SPWM整流器有较好的AC/DC双侧功率变送功能,用其取代斩波串级调速系统的晶闸管逆变装置可以产生容性无功补偿系统无功,从而提高系统功率因数并改善入网谐波电流。通过分析三相电压源型SPWM整流器在容性无功状态的运行特点,应用该变流器基本控制理论,给出了将其应用于斩波串级调速系统逆变器改造方案的设计方法和设计原则,并在Matlab仿真中加以验证。

The three-phases VSR is the ideal substitution for the SCR inverter in the chopped-wave cascade speedcontrol driver,which could create the capacitive reactive power to compensate system reactive power in order toimprove the system power factor and the harmonic current to the grid.By analyzing the operation characteristics of three-phase VSR in the capacitive reactive state,basic control theory of the inverter was applied,the design methods andprinciples of applying it to chopped-wave cascade speed driver system inverter reconstruction were given.At last,theabove conclusions are verified by the Simulink simulation in Matlab.