基于相移控制的有源电力滤波器延时补偿策略

为了满足谐波治理的要求,基于数字控制的电力有源滤波器应用越来越广泛.但是数字控制固有的处理延时导致有源滤波器的补偿性能受到很大的影响.在对有源滤波器数字控制各个模块分析的基础上,提出了一种基于相移控制的延时补偿策略.这种方法的主要思想是充分利用前一采样周期的计算数据,缩短当前采样周期的谐波信号处理时间,进而减小延迟时间,提高滤波器的补偿性能.整个谐波处理方法基于瞬时无功理论.延时补偿策略简单、有效,易于工程实现.在一台50kVA三相四线并联型有源滤波器上进行了实验验证,并把这种方法应用在TMS320LF240和TMS320F2812两个不同的控制平台上进行了性能比较.实验结果证明了该方法的有效性.

Time delay compensation based on phase-shifting for active power filter

Active power filter(APF) with digital control is widely used to solve harmonic problems.But inherent delay time introduced by digital control significantly affects the performance of APFs.We introduced an improved harmonic detection method by using phase-shifting.In order to shorten the computation time of harmonics reference,we used the data calculated in last sample period.So the delay time was shortened,and the performance of APF was improved.The whole algorithm was based on generalized instantaneous rea...