单相DVR快速电压补偿控制的实现

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。

Fast Voltage Compensation for a Single Phase Dynamic Voltage Restorer

Dynamic voltage restorer (DVR) is an effective solution for transient power quality problems. The issues for voltage disturbance detection, selective harmonic elimination based on software phase locking technique and two step voltage compensation algorithm are discussed. The differential and integration strategies are introduced for fast voltage waveform identification and filtering. Second differential is used in eliminating selective harmonics to simplify phase lock filtering. The calculation of initial angle for software phase lock loop (SPLL) is deduced. A model for two step voltage detection and compensation is presented to coordinate the calculations of voltage compensation. The single phase voltage dip tests in a DVR prototype verify the feasibility of the proposed algorithm.