基于动态补偿下垂法的并联逆变器控制研究  

Research on parallel inverter control based on dynamic compensation sag method

作　　者：薛家祥[1] 张姣姣 金礼 Xue Jiaxiang;Zhang Jiaojiao;Jin Li(College of Mechanical and Automobile Engineering,South China University of Technology,Guangzhou 510640,China;College of Physics and Mechatronics Engineering,Guizhou Minzu University,Guiyang 550000,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]贵州民族大学物理与机电工程学院,贵州贵阳550000

出　　处：《电子技术应用》2024年第8期96-101,共6页Application of Electronic Technique

基　　金：国家自然科学基金(51875213);广东省自然科学基金(2214050007061);贵州省省级科技计划项目(ZK[2022]198);贵州省高等学校教学内容和课程体系改革项目(2021083)。

摘　　要：提出了一种基于动态补偿下垂法的新型逆变器并联策略,解决了传统并联逆变器下垂控制策略中频率跌落,无功功率不均分,有功、无功计算结果不准确等问题。该策略包括在功率环中采用CSOGI-QSG模块滤除直流干扰;在传统有功控制环中引入自适应频率反馈策略补偿频率跌落;在无功控制环中引入虚拟电感改善无功功率的分配,并采用自适应电压补偿策略改善母线电压跌落。通过搭建MATLAB仿真和实验平台验证,证明了该控制策略可以显著改善并联逆变器中的功率均分效果。In this paper,a novel inverter parallel strategy based on dynamic compensation sag method is proposed,which solves the problems of traditional parallel inverter sag control strategy,such as frequency drop,unequal distribution of reactive power,inaccurate calculation results of active power and reactive power.The strategy includes using CSOGI-QSG module in the power loop to filter out DC interference.The adaptive frequency feedback strategy is introduced in the traditional active power control loop to compensate the frequency drop.Virtual inductance is introduced into reactive power control loop to improve reactive power distribution,and adaptive voltage compensation strategy is used to improve bus voltage drop.Through MATLAB simulation and experimental platform verification,it is proved that the control strategy can significantly improve the power sharing effect in parallel inverters.

关 键 词：并联逆变器 下垂控制 动态补偿 虚拟阻抗 CSOGI-QSG 

分 类 号：TN86[电子电信—信息与通信工程]