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动态电压恢复器(DVR)是解决暂态电能质量问题的一种有效途径。就单相DVR的电压扰动检测、基于特定谐波消除的软件锁相技术,以及分段式电压补偿策略等问题进行了探讨。引入导数和积分方式来实现快速电压波形鉴别以及噪声消除,通过二次微分消除特定谐波分量,简化锁相滤波,推导了软件锁相初值角的计算方法,提出了分时段电压检测和补偿的模型,并配合实现补偿电压的生成,最后通过DVR样机的单相电压跌落实验验证了上述算法的可行性。
Dynamic Voltage Restorer (DVR) is an effective way to solve the transient power quality problems. This paper discusses the voltage disturbance detection of single-phase DVR, software phase-locked technique based on specific harmonic elimination, and the staged voltage compensation strategy. The introduction of derivative and integral method to achieve rapid voltage waveform identification and noise elimination, through the second derivative of the elimination of specific harmonic components, to simplify the phase-locked filter, derived software lock-in initial angle calculation method, proposed sub-period voltage detection and compensation The simulation results show that the above algorithm is validated by the single-phase voltage drop experiment of DVR prototype.