弱电网条件下LCL型Vienna整流器控制策略研究
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摘要
针对LCL型滤波器存在固有谐振尖峰,实际电网存在变化的电网阻抗以及电网电压背景谐波的问题,基于dq同步旋转坐标系,提出弱电网条件下LCL型Vienna整流器非线性混合无源控制策略,该控制策略可保证闭环系统的渐进稳定,在理想电网和弱电网条件下均实现直流侧电压快速跟踪给定值及交流侧电流正弦化,同时能够实现所建立的系统模型中dq分量之间耦合项的消除。应用Matlab/Simulink搭建了系统仿真模块,并在理想电网条件和弱电网条件2种情况下进行了仿真试验,仿真试验验证了所提控制策略的可行性。
For the LCL type filter, there is a natural resonance peak, and the change of the grid impedance in the actual power grid will further affect the stability of the rectifier. The Euler-Lagrangian mathematical model of LCL-type Vienna rectifier in dq synchronous rotating coordinate system was established, and the nonlinear hybrid passive control strategy of LCL-type Vienna rectifier under weak grid conditions was proposed, which theoretically guarantees the progressive of closed-loop system. It is stable and can meet the requirements of the dynamic and static characteristics of the rectifier and the harmonic suppression capability of the AC side under ideal grid and weak grid conditions. At the same time, it can eliminate the coupling term between dq axes in the established system model. In the Matlab/Simulink simulation environment, the feasibility of the proposed control strategy is verified by simulation experiments under ideal grid conditions and weak grid conditions.
For the LCL type filter, there is a natural resonance peak, and the change of the grid impedance in the actual power grid will further affect the stability of the rectifier. The Euler-Lagrangian mathematical model of LCL-type Vienna rectifier in dq synchronous rotating coordinate system was established, and the nonlinear hybrid passive control strategy of LCL-type Vienna rectifier under weak grid conditions was proposed, which theoretically guarantees the progressive of closed-loop system. It is stable and can meet the requirements of the dynamic and static characteristics of the rectifier and the harmonic suppression capability of the AC side under ideal grid and weak grid conditions. At the same time, it can eliminate the coupling term between dq axes in the established system model. In the Matlab/Simulink simulation environment, the feasibility of the proposed control strategy is verified by simulation experiments under ideal grid conditions and weak grid conditions.
引文
[1]Liserre M,Blaabjerg F,Hansen S.Design and control of an LCL-filter-based three-phase active rectifier[J].IEEE Transactions on Industry Applications,2005,41(5):1281-1291.
[2]Karshenas H R,Saghafi H.Basic criteria in designing LCL filters for grid connected converters[C]//2006IEEE International Symposium on Industrial Electronics.Montreal,Que,Canada:IEEE,2006.
[3]张宪平,林资旭,李亚西,等.LCL滤波的PWM整流器新型控制策略[J].电工技术学报,2007,22(2):74-77.
[4]许津铭,谢少军,肖华锋.LCL滤波器有源阻尼控制机制研究[J].中国电机工程学报,2012,32(9):27-33.
[5]Bao Xianwen,Zhuo Fang,Tian Yuan,et al.Simplified feedback linearization control of three-phase photovoltaic inverter with an LCL filter[J].IEEE Transactions on Power Electronics,2013,28(6):2739-2752.
[6]屈克庆,李文旗,叶天凯,等.基于状态反馈的LCL型逆变器解耦控制策略[J].电工技术学报,2016,31(20):130-138.
[7]包献文,卓放,谭佩喧.三相LCL型并网逆变器的模型分析及解耦控制[J].西安交通大学学报,2014,48(2):44-49,110.
[8]彭秋波,盘宏斌,刘勇,等.LCL型三相并网逆变器双闭环解耦控制器设计[J].电工技术学报,2014,29(4):103-110.
[9]杨东升,阮新波,吴恒.提高LCL型并网逆变器对弱电网适应能力的虚拟阻抗方法[J].中国电机工程学报,2014,34(15):2327-2335.
[10]许津铭,谢少军,唐婷.弱电网下LCL滤波并网逆变器自适应电流控制[J].中国电机工程学报,2014,34(24):4031-4039.
[11]桑顺,高宁,蔡旭,等.功率-电压控制型并网逆变器及其弱电网适应性研究[J].中国电机工程学报,2017,37(8):2339-2351.
[12]李敏,徐群.基于IDA-PBC的LCL滤波并网逆变器控制[J].电力系统及其自动化学报,2014,26(4):50-55,80.
[13]王久和.电能变换器及其无源控制[M].北京:科学出版社,2014:10-22.
[14]IEEE Std.519-1992.IEEE Recommended Practices and Requirements for Harmonic Control in Electric Power Systems[S].New York:Institute of Electrical and Electronics Engineers Inc,1993.
[2]Karshenas H R,Saghafi H.Basic criteria in designing LCL filters for grid connected converters[C]//2006IEEE International Symposium on Industrial Electronics.Montreal,Que,Canada:IEEE,2006.
[3]张宪平,林资旭,李亚西,等.LCL滤波的PWM整流器新型控制策略[J].电工技术学报,2007,22(2):74-77.
[4]许津铭,谢少军,肖华锋.LCL滤波器有源阻尼控制机制研究[J].中国电机工程学报,2012,32(9):27-33.
[5]Bao Xianwen,Zhuo Fang,Tian Yuan,et al.Simplified feedback linearization control of three-phase photovoltaic inverter with an LCL filter[J].IEEE Transactions on Power Electronics,2013,28(6):2739-2752.
[6]屈克庆,李文旗,叶天凯,等.基于状态反馈的LCL型逆变器解耦控制策略[J].电工技术学报,2016,31(20):130-138.
[7]包献文,卓放,谭佩喧.三相LCL型并网逆变器的模型分析及解耦控制[J].西安交通大学学报,2014,48(2):44-49,110.
[8]彭秋波,盘宏斌,刘勇,等.LCL型三相并网逆变器双闭环解耦控制器设计[J].电工技术学报,2014,29(4):103-110.
[9]杨东升,阮新波,吴恒.提高LCL型并网逆变器对弱电网适应能力的虚拟阻抗方法[J].中国电机工程学报,2014,34(15):2327-2335.
[10]许津铭,谢少军,唐婷.弱电网下LCL滤波并网逆变器自适应电流控制[J].中国电机工程学报,2014,34(24):4031-4039.
[11]桑顺,高宁,蔡旭,等.功率-电压控制型并网逆变器及其弱电网适应性研究[J].中国电机工程学报,2017,37(8):2339-2351.
[12]李敏,徐群.基于IDA-PBC的LCL滤波并网逆变器控制[J].电力系统及其自动化学报,2014,26(4):50-55,80.
[13]王久和.电能变换器及其无源控制[M].北京:科学出版社,2014:10-22.
[14]IEEE Std.519-1992.IEEE Recommended Practices and Requirements for Harmonic Control in Electric Power Systems[S].New York:Institute of Electrical and Electronics Engineers Inc,1993.