基于瞬时无功理论的先进静止无功发生器的研究

Design of advanced static var generator based on the instantaneous reactive-power theory

提出了一种基于瞬时无功功率理论的先进静止无功发生器(ASVG)的控制方案。首先详细地对瞬时无功功率理论检测控制信号进行了分析,在此基础上,介绍了无功电流闭环间接控制方案,应用基于瞬时无功功率理论的无功电流检测法实时检测无功电流,提高了系统响应速度。然后简单介绍了ASVG的电路结构;控制器选用TMS320LF2407来实现数据采样、计算和实时控制,满足ASVG实时快速控制的要求,提高了PWM脉冲精度。最后通过Matlab对控制方案做了系统仿真。通过理论论证和仿真分析表明本设计方案是可行的。

A control scheme of the advanced static var generator （ASVG） is determined. First, the instantaneous reactive-power theory is analyzed, Then, the closed-loop indirect current control strategy is introduced. Based on the instantaneous reactive-power theory, the reactive current is detected in time, and this method increases the speed of systematic response. On configuration of system, the converter＇s power module based on IGBT is adopted in main circuit： and a TMS320LF2407 is adopted as the main controller to deal with sampling, calculating and controlling on-line, its performance satisfies the request of the speedy on-line control and heightens the precision of PWM-pulse. Finally, a simulation is done through the software of MATLAB. The ASVG is tested as the most promising technique for the current control.