不同运行方式下微网逆变器并网特性比较分析
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摘要
介绍了逆变器的下垂控制和VSG控制的两种不同的并网控制策略,并分别建立了下垂控制和VSG控制并网时的输出功率方程,分析了下垂控制并网时具有较快响应的原因。借鉴下垂控制的优点,通过对VSG控制方式加入比例微分环节,引入有功输出及有功参考闭环反馈来改善系统的动态特性。仿真结果表明,所提出的优化策略能优化VSG的系统阻尼,改善逆变器并网运行的动态特性。
In this paper,two different grid-connected control strategies of inverter droop control and VSG control are introduced.On this basis,the output power equations of droop control and VSG control are established respectively,and the reason why the droop control has a faster response is analyzed.Drawing on the advantages of droop control,the active output and the active reference closed-loop feedback are introduced to improve the dynamic characteristics of VSG control system are improved by adding proportional differential link.The simulation results show that the proposed optimization strategy can optimize the system damping of VSG and improve the dynamic characteristics of grid-connected inverter.
In this paper,two different grid-connected control strategies of inverter droop control and VSG control are introduced.On this basis,the output power equations of droop control and VSG control are established respectively,and the reason why the droop control has a faster response is analyzed.Drawing on the advantages of droop control,the active output and the active reference closed-loop feedback are introduced to improve the dynamic characteristics of VSG control system are improved by adding proportional differential link.The simulation results show that the proposed optimization strategy can optimize the system damping of VSG and improve the dynamic characteristics of grid-connected inverter.
引文
[1]罗剑波,陈永华,刘强.大规模间歇性新能源并网控制技术综述[J].电力系统保护与控制,2014,429(22):140-146.
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[4]陈来军,王任,郑天文,等.基于参数自适应调节的虚拟同步发电机暂态响应优化控制[J].中国电机工程学报,2016(21):5724-5731.
[5]程冲,杨欢,曾正,等.虚拟同步发电机的转子惯量自适应控制方法[J].电力系统自动化,2015,39(19):82-89.
[6]胡文强,吴在军,孙充勃,等.基于VSG的储能系统并网逆变器建模与参数整定方法[J].电力自动化设备,2018,38(8):13-23.
[7]吴恒.三相四线制虚拟同步发电机控制技术的研究[D].南京:南京航空航天大学,2015.
[8]曹元峥.基于虚拟同步发电机的微电网逆变器控制策略研究[D].合肥:合肥工业大学,2017.
[9]吕志鹏,盛万兴,钟庆昌等.虚拟同步发电机及其在微电网中的应用[J].中国电机工程学报,2015,34(16):2591-2602.
[10]刘芳.基于虚拟同步机的微网逆变器控制策略研究[D].合肥:合肥工业大学,2015.
[11]程鹏.自动控制原理[M].北京:高等教育出版社,2010.
[2]Beck H-P,Hesse R.Virtual synchronous machine[C].Electrical Power Quality and Utilisation,2007.EPQU 2007.9th International Conference,IEEE,2007,1-6.
[3]SWH De Haan,Visscher K.Virtual synchronous machines for frequency stabilization in future grids with a significant share of decentralized generation[C].CIRED Seminar,2008,1-4.
[4]陈来军,王任,郑天文,等.基于参数自适应调节的虚拟同步发电机暂态响应优化控制[J].中国电机工程学报,2016(21):5724-5731.
[5]程冲,杨欢,曾正,等.虚拟同步发电机的转子惯量自适应控制方法[J].电力系统自动化,2015,39(19):82-89.
[6]胡文强,吴在军,孙充勃,等.基于VSG的储能系统并网逆变器建模与参数整定方法[J].电力自动化设备,2018,38(8):13-23.
[7]吴恒.三相四线制虚拟同步发电机控制技术的研究[D].南京:南京航空航天大学,2015.
[8]曹元峥.基于虚拟同步发电机的微电网逆变器控制策略研究[D].合肥:合肥工业大学,2017.
[9]吕志鹏,盛万兴,钟庆昌等.虚拟同步发电机及其在微电网中的应用[J].中国电机工程学报,2015,34(16):2591-2602.
[10]刘芳.基于虚拟同步机的微网逆变器控制策略研究[D].合肥:合肥工业大学,2015.
[11]程鹏.自动控制原理[M].北京:高等教育出版社,2010.