不平衡负载下并网逆变器功率解耦控制方法  

Power Decoupling Control Method for Grid Connected Inverters under Unbalanced Load

作　　者：董燕丽 刘攀 赵晓艳 DONG Yanli;LIU Pan;ZHAO Xiaoyan(School of Intelligent Engineering,Jinzhong College of Information,Jinzhong Shanxi 030800,China)

机构地区：[1]晋中信息学院智能工程学院,山西晋中030800

出　　处：《电子器件》2024年第2期404-409,共6页Chinese Journal of Electron Devices

基　　金：河北省重点建设项目(21156);山西省教育科学“十四五”规划课题项目(GH-220497);山西省教育科学“十四五”规划课题项目(GH-220603);山西省高等学校教学改革创新项目(J20231719)。

摘　　要：为了解决并网逆变器在不平衡负载下有功功率和无功功率为耦合影响状态、关联复杂,导致控制精度不佳、响应慢等问题,提出不平衡负载下并网逆变器功率解耦控制方法。根据并网逆变器拓扑结构获取并网逆变器功率,对并网逆变器有功功率与无功功率实行解耦,并通过带比例系数的双闭环功率控制器,完成并网逆变器功率解耦控制。在此基础上,通过遗传算法进行控制参数优化,获取比例系数的最优解,进一步提高并网逆变器功率解耦控制能力。实验结果表明:解耦后的控制方法在并网逆变器响应功率与给定功率上基本一致,解耦后的功率波动范围降低了8 kW,功率控制电流和功率波动最小,具有良好的控制效果。In order to solve the problems of poor control accuracy and slow response caused by the coupling effect between active and re⁃active power of grid connected inverters under unbalanced loads,a power decoupling control method for grid connected inverters under unbalanced loads is proposed.Based on the topology of the grid connected inverter,the power of the grid connected inverter is obtained,and the active and reactive power of the grid connected inverter are decoupled.The power decoupling control of the grid connected in⁃verter is achieved through a dual closed⁃loop power controller with proportional coefficients.On this basis,genetic algorithm is used to optimize control parameters and obtain the optimal solution of proportional coefficients,further improving the power decoupling control a⁃bility of grid connected inverters.The experimental results show that the decoupled control method has a good control effect as the re⁃sponse power of the grid connected inverter is basically consistent with the given power.The decoupled power fluctuation range is re⁃duced by 8 kW,and the power control current and power fluctuation are minimized.

关 键 词：不平衡负载 并网逆变器 遗传算法 功率解耦控制 双闭环控制器 

分 类 号：TM464[电气工程—电器]