摘要
针对中频逆变电源的特殊应用领域和对其较高的性能要求,提出了一种基于重复控制和PI控制的复合控制策略,并建立了中频逆变电源的数学模型,详细分析了重复控制系统的原理和结构,重点阐述了重复控制系统中的重复控制发生器和补偿器的设计方法,最后建立了该复合控制的系统框图。该方案利用重复控制来提高系统的稳态性能和谐波抑制能力,而PI控制则用于改善系统的动态特性。基于该复合控制策略,采用仿真软件Matlab7.0建立了中频逆变电源的仿真模型,仿真实验结果表明,该方案能够使中频逆变电源在额定阻性负载、突加和突减阻性负载时均能获得良好的稳态和动态性能,即使在带非线性负载时也能获得比较理想的输出波形。
To meet the requirements for high performance of medium frequency inverter in special applications,a hybrid control scheme based on repetitive control and PI control is proposed. The mathematical model of the medium frequency inverter is founded and the control theory and structure of the repetitive control system are described. The block diagram of the hybrid control system is given and the design of the generator and compensator in repetitive control system is expatiated. The repetitive control is used to improve the static performance and harmonic suppression capability of system,and the PI control is used to enhance the dynamic performance of system. The simulation model of medium frequency inverter based on the hybrid control is founded using simulation software Matlab7.0. Simulation results show that,the proposed control scheme can endow the medium frequency inverter with better static and dynamic performance for rated resistance load and sudden resistance load change. The system can obtain better output waveforms even for nonlinear load.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第7期66-69,共4页
Electric Power Automation Equipment
