一种改进混合式电压暂降检测方法

An improved hybrid voltage sag detection method

电压暂降检测算法的性能直接影响动态电压恢复器(DVR)的电压补偿效果,但传统电压暂降检测算法难以同时兼顾快速性和准确性,针对该问题,提出一种改进混合式电压暂降检测方法,采用该方法,DVR能够在2 ms内快速检测并补偿电压暂降。首先介绍了改进混合式电压暂降检测的工作原理,在此基础上介绍了结合改进时域法和dq变换法的混合式电压暂降检测方法的机理和设计。最后仿真结果证明该方法可显著提高电压暂降检测及补偿速度,改善DVR的补偿效果。

The performance of the voltage sag detection algorithm directly affects the voltage compensation effect of the DVR,but the traditional voltage sag detection algorithm is difficult to take into account the speed and accuracy at the same time.Aiming at this problem,this paper proposes a improved hybrid DVR voltage sag detection method.Using the deteciton method DVR can quickly detect and compensate the voltage sag within 2ms.The article first introduces the working principle of the improved hybrid voltage sag detection.On this basis,it introduces the mechanism and de-sign of the hybrid voltage sag detection method combining the improved time domain method and the dq transform meth-od.Finally,the simulation results prove that this method can significantly increase the speed of voltage sag detection and compensation,and improve the compensation effect of DVR.