离网VSG逆变器自适应控制策略研究  

Research on self⁃adaptive control strategy of off⁃grid VSG inverter

作　　者：袁臣虎[1] 段斌伟 刘晓明[1] YUAN Chenhu;DUAN Binwei;LIU Xiaoming(School of Electrical Engineering and Automation,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学电气工程与自动化学院,天津300387

出　　处：《现代电子技术》2020年第24期22-25,共4页Modern Electronics Technique

基　　金：国家自然科学基金项目(51577133);国家自然科学基金重点项目(51337001)。

摘　　要：虚拟同步发电机(VSG)逆变器控制策略将同步发电机转动惯量和阻尼系数参数引入到逆变器控制中,为了进一步提升VSG的频率动态调节性能,文中提出一种离网VSG逆变器转动惯量和阻尼系数一同自适应控制策略。分别建立VSG逆变器转动惯量与角频率变化率和阻尼系数与角频率偏差量之间的自适应函数关系,搭建该自适应控制策略的仿真模型。仿真结果表明,改进的VSG控制策略能够根据负载扰动引起的频率变化率和偏差量自适应调节转动惯量和阻尼系数,减小频率变化率和频率的绝对偏差,从而改善逆变器的频率动态响应特性。The control strategy of virtual synchronous generator(VSG)inverter introduces the rotational inertia and damping coefficient parameter of the synchronous generator into the inverter control.A self⁃adaptive control strategy of the rotational inertia and damping coefficient parameter of off⁃grid VSG inverter is proposed to further improve the frequency dynamic adjustment performance of the VSG inverter.The adaptive function relationship between rotational inertia and angular frequency change ratio of the VSG inverter,and damping coefficient and angular frequency deviation value is established,respectively.The simulation model of the self⁃adaptive control strategy is built.The simulation results show that the improved VSG control strategy can adaptively adjust the rotational inertia and damping coefficient according to the frequency change rate and deviation value caused by the load disturbance,which reduces the frequency change ratio and the absolute deviation of frequency.Thus,the frequency dynamic response of the inverter is improved.

关 键 词：VSG逆变器 自适应控制 转动惯量 阻尼系数 自适应函数 仿真实验 

分 类 号：TN850.3-34[电子电信—信息与通信工程] TM464[电气工程—电器]