关键词: 维也纳整流器, 自适应 PID 控制, 在线参数整定, 鲁棒控制

Abstract: An adaptive proportional-integral-derivative ( PID) control strategy based on Lyiapunov stability theory is proposed to address the insufficient dynamic performance and robustness of the traditional fixed-parameter PID controller for three-phase VIENNA rectifier under parameter changes and load perturbations. The strategy constructs a dual-loop controller structure based on the online self-tuning algorithm for deriving the inner and outer loop PID parameters by the Lyiapunov method to guarantee the global stability of the closed-loop system. The simulation model is constructed by MATLAB / Simulink, Compared with the traditional PID controller, the adaptive PID controller at rated load reduces the current total harmonic distortion( THD) rate of the current by about 39. 5%,and the power factor can reach 0. 998;and reduces the voltage drop by
about 43. 5% under the heavy load step condition. This effectively improves the comprehensive performance and robustness of the rectifier under complex operating conditions.

Key words: VIENNA rectifier, adaptive proportional-integral-derivative control, online parameter tuning, robust control