基于优化滑动傅立叶分析和广义积分的并联有源滤波器控制策略

并联有源滤波器是一种解决非线性负载引起的谐波问题的有效手段,由于其性能的好坏受谐波检测和电流控制两方面因素的影响,文中提出了一种基于优化滑动傅立叶分析的电源参考电流获取方法,该方法在电网电压畸变的情况下依然适用;同时将广义积分应用于电流控制策略中,实现了电流跟踪零稳态误差的目标;并针对广义积分控制器的数字实现、延迟补偿以及抑制饱和做了深入的分析.实验结果证明了文中所提出的控制策略的有效性和可行性.

A NOVEL CONTROL STRATEGY FOR SHUNT ACTIVE POWER FILTER BASED ON OPTIMIZED SLIDING FOURIER ANALYSIS AND GENERALIZED INTEGRAL

Shunt active power filter is an effective means to eliminate current harmonics caused by nonlinear loads. Because its performance is impacted by both harmonics detection and current control algorithm, the authors propose a new method to calculate the grid reference current based on optimized sliding Fourier analysis, this method is still applicable under the condition of power system voltage distortion. At the same time, the PI controllers using stationary-frame generalized integrator are adopted to realize zero steady-state error for current tracking. The analysis on numeral implement of generalized integral controller, delay compensation and saturation restraining are conducted in detail. Experiment results show that the proposed control strategy is effective and feasible.