基于KMTOA的三相光伏逆变器双环控制研究  

Research of Double Closed Loop PI Controller Based on KMTOA for Three-Phase Photovoltaic Inverter

作　　者：吴静平 何浪[1] 王根平[2] WU Jing-ping;HE Lang;WANG Gen-ping(Hunan Province Cooperative Innovation Center for Wind Power Equipment and Energy Conversion,Xiangtan University,Xiangtan 4111 05,China;Shenzhen Polytechnic,Shenzhen 518000,China)

机构地区：[1]湘潭大学湖南省"风电装备与电能变换"2011协同创新中心,湖南湘潭411105 [2]深圳职业技术学院,广东深圳518000

出　　处：《电工电气》2018年第8期14-19,共6页Electrotechnics Electric

基　　金：国家自然科学基金项目(61572416);湖南省自然科学基金项目(2016JJ5033);深圳市基础布局项目(JCYJ20160429112213821)

摘　　要：以离网三相光伏逆变器为研究对象,选择电压电流双闭环控制作为其控制策略,针对传统PI控制参数难整定、系统变化适应性差的问题,引入了分子动理论优化算法来辨识双闭环控制器的PI参数,实现动态优化。基于MATLAB平台的仿真实验结果表明:相比于传统的PI控制以及PSO和GA算法两种智能算法,该算法具有操作简便、超调量小、响应快、适应性强等特点;系统输出的电压、电流波形呈现良好的正弦特性,总谐波畸变率小,有效改善了逆变器的动态性能及其输出电压的质量。The three-phase photovoltaic inverter is used as the research object and the voltage and current double closed loop control was selected as its control strategy.Aiming at the problem that the traditional PI control parameters were difficult to be adjusted and the system variation was poor,kinetic molecular theory optimization algorithm was introduced to identify the PI parameters of double closed loop controller to realize dynamic optimization.The result of simulation experiment in MATLAB shows that compared with the traditional PI controller,the particle swarm optimization(PSO)and GA algorithms have many advantages,such as simple operation,small overshoot,fast response,strong adaptability and so on.The system output voltage and current waveform has a good sinusoidal characteristic,and the total harmonic distortion(THD)is smaller,which can improve the dynamic performance and the quality of output voltage in inverter effectively.

关 键 词：三相光伏逆变器 双闭环PI控制 分子动理论优化算法 辨识参数 

分 类 号：TM464[电气工程—电器]