逆变电源改进型重复控制器设计及仿真研究

针对恒频恒压(CFCV)逆变电源控制系统,提出了一种采用重复控制器与比例、积分、微分调节器有机结合的控制策略,以提高逆变电源在非线性负载情况下的输出电源品质。基于该控制策略,给出了重复控制器各个部分参数的详细设计方案以及比例、积分、微分调节器的系数;构建补偿器Q(z)和S(z)时,引入特殊的零相移Notch函数,对PWM型逆变电源输出电压谐波干扰进行有效抑制。利用Matlab对系统进行了仿真,结果表明该改进型方案可以保证系统具有较好的动、静态特性,稳压精度高,输出波形的谐波含量降到了1.07%,误差收敛速度大幅度提高。

Design and simulation of improved repetitive controller for inverted power supply

A control strategy is proposed for the control system of CFCV(Constant Frequency and Constant Voltage) inverted power supply,which combines the repetitive controller with the PID (Proportional-Integral-Differential) regulator to improve the quality of inverted power supply output for nonlinear load. The design of repetitive controller is detailed to the parameters of all components and the PID coefficients are presented. The special zero-phase-shift North function is adopted to build compensator Q(z) and S(z). The voltage harmonics of PWM-type inverted power supply is effec-tively suppressed. The Matlab simulation shows that,the proposed strategy guarantees excellent dynamic and static system characteristics and higher voltage-stabilization precision;the harmonic contents of output waveforms reduces to 1.07%,and the error convergence speed is greatly improved.