动态电压恢复器及其检测方法的探讨

Study of dynamic voltage restorer and its detecting method

动态电压恢复器用来对敏感负荷进行保护。介绍了动态电压恢复器的工作原理和主电路结构,提出了基于“abc-dq”变换的检测算法,使得改进后的算法具有准确、快速的特点。针对负荷对电压相角跳变敏感程度的不同,补偿电压波形也不相同,因此控制策略也不同。仿真结果证明了该检测算法的优点。

Dynamic Voltage Restorer(DVR)is used to protect the sensitive loads.The working prin-ciple of DVR and its structure are analyzed.An improved detecting algorithm based on'a bc-d q'transaction is brought forward,which is precise and fast.According to the different sensitivities of different loads to the phase angle jump of voltage sag,different compensating voltage waveforms and different control strategies are applied.The simulating results have verified the advantages of the improved detecting method.