谐振注入式有源滤波器数字化控制系统延时研究

有源电力滤波器作为动态谐波治理装置对系统实时性的要求很高，其数字化控制系统中存在的延时将不可避免地对系统整体性能产生消极影响。该文以目前有实用先例的谐振注入式有源滤波器为例，从分析数字化有源滤波系统产生延时的原因出发，就谐波补偿效果、系统稳定性和PWM调制3方面探讨了延时对谐振注入式有源滤波系统性能产生的影响，同时结合实例提出从器件选型、提高采样频率和应用信号预测算法3个方面有效减小延时以提高系统整体性能的方法，所得的结论也能够推广应用于其它结构的并联混合型有源滤波装置中，为其设计和参数选型提供有益的指导。

The Research of the Delay Based on Digital Control System of Resonance Injection Active Power Filter

As the dynamic harmonic filtering equipment, the active power filter (APF) is very high to the system timely request. However, the process of data collection and digital control system brings time delay more or less. Obviously，the time delay is negative to the harmonic canceling system. By the analysis of the reason of delay, the paper focuses on the several influences of delay on the performance of resonance injection APF, including compensation effect、system stability and PWM modulation. Taking it as the foundation, the paper also presents some methods to reduce the delay and gives a brief introduction about the methods applying in a resonance injection APF project. The conclusion is helpful to the design of other kind of APF either.