A novel control method of power quality waveform tracking compensation based on H∞ model matching technology

In this paper, the advanced H_∞-optimization control theory is concretely applied to the controller design of power quality regulation equipments. A novel control method of waveform tracking compensation control based on H_∞ model matching technology is proposed for the first time. In addition, the control principle and physical essence of this method are profoundly expatriated. Moreover, the H_∞ standard control block diagram and the state space expression of model matching system are given. This H_∞-optimization control method, which has both strict mathematical basis and explicit physical meaning, can be used not only for realizing the optimal design to improve control precision, but also for assuring the designed closed-loop control system to be internally stable. This study establishes the well-knit theoretical basis for improving the compensation control characters of power quality regulation equipments. By adopting this method, the dynamic tracking compensation optimization control of voltage and current waveform can be conveniently implemented, and its validity has been testified successfully.