基于三相多功能逆变器的微电网电能质量综合治理策略
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摘要
基于三相多功能逆变器(three-phase multi-function inverters,TPMFI),提出一种微电网电能质量综合治理方案。将线性自抗扰控制器和重复控制器结合,提出一种兼具快速性和高跟踪精度的电流内环-LADRC+RC电流内环;并依靠LADRC+RC电流内环的良好性能,提出一种适用于TPMFI的下垂控制策略,同时保证TPMFI的电能质量补偿功能与功率输出功能的实现,进而确保微电网的稳定运行;最后在此基础上,提出一种基于熵-Shapely二次权重修正法的TPMFI补偿容量分配方案,对微电网的整体电能质量进行实时优化补偿。Simulink仿真表明,所提综合治理策略能在保证微电网的稳定运行的基础上,改善微电网的电能质量。
A comprehensive power quality control strategy is proposed based on three-phase multi-function inverters(TPMFI) in this paper. By combining active disturbance rejection controller and repetitive controller, an LADRC+RC inner loop with fast response and high accuracy is established.Based on the good performance of LADRC+RC inner loop, a droop controller for TPMFI, with the functions of power quality compensation and power output, is proposed. Stability of microgrid is therefore guaranteed. Finally, on basis of a stable microgrid, a method for allocating compensation volume is proposed based on entropy-Shapely quadratic weight correction. The proposed allocation method is able to optimize the overall power quality of microgrid in real time. Simulink simulations verify that the proposed comprehensive power quality control strategy can guarantee stability of microgrid and enhance power quality of microgrid at the same time.
A comprehensive power quality control strategy is proposed based on three-phase multi-function inverters(TPMFI) in this paper. By combining active disturbance rejection controller and repetitive controller, an LADRC+RC inner loop with fast response and high accuracy is established.Based on the good performance of LADRC+RC inner loop, a droop controller for TPMFI, with the functions of power quality compensation and power output, is proposed. Stability of microgrid is therefore guaranteed. Finally, on basis of a stable microgrid, a method for allocating compensation volume is proposed based on entropy-Shapely quadratic weight correction. The proposed allocation method is able to optimize the overall power quality of microgrid in real time. Simulink simulations verify that the proposed comprehensive power quality control strategy can guarantee stability of microgrid and enhance power quality of microgrid at the same time.
引文
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[14]王成山,李琰,彭克.分布式电源并网逆变器典型控制方法综述[J].电力系统及其自动化学报,2012,24(2):12-20.Wang Chengshan,Li Yan,Peng Ke.Overview of typical control methods for grid-connected inverters of distributed generation[J].Proceedings of the CSU-EPSA,2012,24(2):12-20(in Chinese).
[15]Mannen T,Fujita H.Dynamic control and analysis of dc-capacitor voltage fluctuations in three-phase active power filters[J].IEEETransactions on Power Electronics,2016,31(9):6710-6718.
[16]Guerrero J M,Matas J,Luis G D V,et al.Decentralized control for parallel operation of distributed generation inverters using resistive output impedance[J].IEEE Transactions on Industrial Electronics,2007,54(2):994-1004.
[17]Mohamed Y A R I,El-Saadany E F.Adaptive decentralized droop controller to preserve power sharing stability of paralleled inverters in distributed generation microgrids[J].IEEE Transactions on Power lectronics,2008,23(6):2806-2816.
[18]Golestan S,Guerrero J M,Vasquez J C.Three-phase PLLs:a review of recent advances[J].IEEE Transactions on Power Electronics,2017,32(3):1894-1907.
[19]Sun G,Li Y,Jin W,et al.A nonlinear three-phase phase-locked loop based on linear active disturbance rejection controller[J].IEEEAccess,2017(5):21548-21556.
[20]Jin W,Li Y,Sun G,et al.Stability analysis method for three-phase multi-functional grid-connected inverters with unbalanced local loads considering the active imbalance compensation[J].IEEE Access,2018(6):54865-54875.
[21]席雪红.基于熵-Shapely的样本差异赋权方法[J].统计与决策,2012(20):84-86.Xi Xuehong.Sample different weighting method based on EntropyShapely[J].Statistics and Decision,2012(20):84-86(in Chinese).
[22]聂程,雷万钧,王跃,等.LCL型有源滤波器电流指令补偿方法[J].电网技术,2018,42(6):1929-1935.Nie Cheng,Lei Wanjun,Wang Yue,et al.Reference current compensation method for LCL type active power filter[J].Power System Technology,2018,42(6):1929-1935(in Chinese).
[2]于芃,刘兴华,孙树敏,等.高可再生能源渗透率海岛微电网运行控制[J].电网技术,2018,42(3):779-788.Yu Peng,Liu Xinghua,Sun Shuming,et al.Study on operation control of island microgrid with high renewable energy penetration[J].Power System Technology,2018,42(3):779-788(in Chinese).
[3]陈继开,马修伟,李江,等.并联双APF交互影响分析[J].电网技术,2017,41(3):956-961.Chen Jikai,Ma Xiuwei,Li Jiang,et al.Analysis on interaction of twoparallel APF[J].Power System Technology,2017,41(3):956-961(in Chinese).
[4]刘爱文,罗安,何志兴,等.H桥级联型SVG模型预测控制[J].电网技术,2015,39(1):83-89.Liu Aiwen,Luo An,He Zhixing,et al.Model predictive control of cascaded H-bridge static var generator[J].Power System Technology,2015,39(1):83-89(in Chinese).
[5]曾正,赵荣祥,杨欢,等.多功能并网逆变器及其在微电网电能质量定制中的应用[J].电网技术,2013,36(5):58-67.Zeng Zheng,Zhao Rongxiang,Yang Huan,et al.A multi-functional grid-connected inverter and its application to customized power quality of microgrid[J].Power System Technology,2013,36(5):58-67(in Chinese).
[6]曾正,邵伟华,赵伟芳,等.多功能并网逆变器与并网微电网电能质量的分摊控制[J].中国电机工程学报,2015,35(19):4947-4955.Zeng Zheng,Shao Weihua,Zhao Weifang,et al.Coordination control of multiple multi-functional grid-tied inverters to share power quality issues for grid-connected micro-grid[J].Proceedings of the CSEE,2015,35(19):4947-4955(in Chinese).
[7]Tang X,Tsang K M,Chan W L.A power quality compensator with dg interface capability using repetitive control[J].IEEE Transactions on Energy Conversion,2012,27(2):213-219.
[8]Zou Z X,Wang Z,Cheng M.Modeling,analysis,and design of multifunction grid-interfaced inverters with output LCL filter[J].IEEETransactions on Power Electronics,2014,29(7):3830-3839.
[9]李小叶,李永丽,张玮亚,等.基于多功能并网逆变器的电能质量控制策略[J].电网技术,2015,39(2):556-562.Li Xiaoye,Li Yongli,Zhang Weiya,et al.A power quality control strategy based on multi-functional grid-connected inverter[J].Power System Technology,2015,39(2):556-562(in Chinese).
[10]卜立之,李永丽,孙广宇,等.基于改进型重复控制算法的多功能并网逆变器设计[J].电力系统自动化,2017,41(12):48-55,69.Bu Lizhi,Li Yongli,Sun Guangyu,et al.Design of multi-functional grid-connected inverter based on modified repetitive control algorithm[J].Automation of Electric Power Systems,2017,41(12):48-55,69(in Chinese).
[11]陈增强,孙明玮,杨瑞光.线性自抗扰控制器的稳定性研究[J].自动化学报,2013,39(5):574-580.Chen Zengqiang,Sun Mingwei,Yang Ruiguang.On the stability of linear active disturbance rejection control[J].Acta Automatica Sinica,2013,39(5):574-580(in Chinese).
[12]Parker S G,Mcgrath B P,Holmes D G.Regions of active damping control for LCL filters[J].IEEE Transactions on Industry Applications,2014,50(1):424-432.
[13]屈艾文,陈道炼.重复控制三相电压型准Z源光伏并网逆变系统[J].电网技术,2017,41(6):1998-2008.Qu Aiwen,Chen Daolian.Three-phase voltage-fed quasi-z-source photovoltaic grid-connected inverter system with repetitive control[J].Power System Technology,2017,41(6):1998-2008(in Chinese).
[14]王成山,李琰,彭克.分布式电源并网逆变器典型控制方法综述[J].电力系统及其自动化学报,2012,24(2):12-20.Wang Chengshan,Li Yan,Peng Ke.Overview of typical control methods for grid-connected inverters of distributed generation[J].Proceedings of the CSU-EPSA,2012,24(2):12-20(in Chinese).
[15]Mannen T,Fujita H.Dynamic control and analysis of dc-capacitor voltage fluctuations in three-phase active power filters[J].IEEETransactions on Power Electronics,2016,31(9):6710-6718.
[16]Guerrero J M,Matas J,Luis G D V,et al.Decentralized control for parallel operation of distributed generation inverters using resistive output impedance[J].IEEE Transactions on Industrial Electronics,2007,54(2):994-1004.
[17]Mohamed Y A R I,El-Saadany E F.Adaptive decentralized droop controller to preserve power sharing stability of paralleled inverters in distributed generation microgrids[J].IEEE Transactions on Power lectronics,2008,23(6):2806-2816.
[18]Golestan S,Guerrero J M,Vasquez J C.Three-phase PLLs:a review of recent advances[J].IEEE Transactions on Power Electronics,2017,32(3):1894-1907.
[19]Sun G,Li Y,Jin W,et al.A nonlinear three-phase phase-locked loop based on linear active disturbance rejection controller[J].IEEEAccess,2017(5):21548-21556.
[20]Jin W,Li Y,Sun G,et al.Stability analysis method for three-phase multi-functional grid-connected inverters with unbalanced local loads considering the active imbalance compensation[J].IEEE Access,2018(6):54865-54875.
[21]席雪红.基于熵-Shapely的样本差异赋权方法[J].统计与决策,2012(20):84-86.Xi Xuehong.Sample different weighting method based on EntropyShapely[J].Statistics and Decision,2012(20):84-86(in Chinese).
[22]聂程,雷万钧,王跃,等.LCL型有源滤波器电流指令补偿方法[J].电网技术,2018,42(6):1929-1935.Nie Cheng,Lei Wanjun,Wang Yue,et al.Reference current compensation method for LCL type active power filter[J].Power System Technology,2018,42(6):1929-1935(in Chinese).