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动态电压恢复器(DVR)是补偿电压暂降最经济、最有效的装置。研究DVR的检测算法是设计DVR最重要和最主要的任务之一。常见的检测算法有每相电压量导数算法、单相电压延迟60°构造三相电压dq变换法、求导数法构造三相虚拟电压的dq分解法和两点法。通过对各种检测算法的理论分析和在实际装置上的仿真波形研究,确定两点法具有原理明确、实现方法简单、计算误差小等优点,更适合作为工程用DVR装置的检测算法。
Dynamic Voltage Restorer (DVR) is the most economical and effective means of compensating for voltage sags. Research DVR detection algorithm is one of the most important and the most important tasks in designing DVR. The common detection algorithm is the derivative of the voltage of each phase. The single-phase voltage is delayed by 60 ° to construct the three-phase voltage dq transform method, and the derivative method of dq and the two-point method for calculating the three-phase virtual voltage are given. Through the theoretical analysis of various detection algorithms and the research of simulation waveforms on actual devices, the two-point method has the advantages of clear principle, simple implementation method and small calculation error, and is more suitable as a detection algorithm for engineering DVR devices.