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介绍了单周控制有源滤波器的原理 ,针对经典单周控制有源滤波器存在的诸如电流直流分量问题、局部稳定问题等 ,提出了单周控制有源滤波器的互补控制策略、电流直流分量负反馈策略和两路信号差值积分负反馈策略。新控制策略的采用彻底克服了经典单周控制有源滤波器的电流直流分量问题 ,实现了单周控制有源滤波器的全局稳定 ,并消除了电流交越失真 ,使得具有诸如无须参考信号、检测量少、控制简便、波形质量高、动态跟踪性能好、抗干扰能力强等显著优点的单周控制有源滤波技术达到实用化程度。实验结果证实了所述控制策略的有效性。
The principle of single-cycle controlled active filter is introduced. Aiming at the existing problems of current single-cycle controlled active filter, such as current DC component problem and local stability problem, a complementary control strategy for single-cycle controlled active filter is proposed. Current DC Component negative feedback strategy and two-channel signal difference integral negative feedback strategy. The adoption of the new control strategy completely overcomes the problem of the current DC component of the classical single-cycle controlled active filter, achieves the global stability of the single-cycle controlled active filter and eliminates the current crossover distortion, Detection of less, simple control, high quality waveform, good dynamic tracking performance, strong anti-interference ability and other significant advantages of single-cycle control of active filtering technology to achieve the degree of practicality. The experimental results confirm the effectiveness of the control strategy.