摘要
随着电网负载的多样性,对补偿装置提出了更高的要求,研发一种功能完备、性能优良的补偿装置是十分必要的。本文在传统静止同步补偿器无功补偿控制策略基础上,增加了谐波抑制和不平衡治理功能。指定次谐波的补偿精度和动态响应取决于电流调节器的性能,本文以多同步旋转坐标系为基础,提出一种新的控制方法,该控制方法将重复控制器通过一个相加环节叠加到PI控制器中形成复合电流调节器。复合电流调节器在实现谐波电流独立控制的同时,又提高了整个系统的稳态精度。仿真结果验证了新的控制方法的优越性。
Along with the diversity of power loads,higher requirements for compensation devices have been proposed,thus it is necessary to develop a compensation device with perfect function and good performance.On the basis of reactive power compensation control strategy for a traditional static synchronous compensator(STATCOM),suppression of harmonics and control of unbalance are added.The compensation accuracy and dynamic response of selective harmonics depend on the performance of a current regulator.In this paper,a new control method is proposed based on multiple synchronous rotating frames,in which a repetitive controller is added to a PI controller through an additive link.In this way,a composite current regulator is formed,which realizes independent control of harmonic current and improves the steady-state accuracy of the system at the same time.Simulation results verify the superiority of the new control method.
引文
[1]王兆安,杨君,刘进军.谐波抑制和无功功率补偿[M].北京:机械工业出版社,1998.
[2]戴毅,常鲜戎,董正华(Dai Yi,Chang Xianrong,Dong Zhenghua).改进Ip-Iq法在D-STATCOM电流检测的应用(Application of improved Ip-Iq detection method on D-STATCOM current detection)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2014,26(7):64-69.
[3]钟畅,游小杰,郭希铮,等(Zong Chang,You Xiaojie,Guo Xizheng,et al).基于复矢量电流调节器的指定次谐波电流控制方法研究(Selective-harmonic active power filter using complex vector PI current regulator)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2014,33(6):23-29,57.
[4]郭希铮,韩强,杨耕,等(Guo Xizheng,Han Qiang,Yang Geng,et al).可选择谐波型有源电力滤波器的闭环控制和实现(Closed-loop control method and implementation of selective harmonic type active power filters)[J].电工技术学报(Transactions of China Electrotechnical Society),2006,21(9):51-56.
[5]张树全,戴珂,谢斌,等(Zhang Shuquan,Dai Ke,Xie Bin,et al).多同步旋转坐标系下指定次谐波电流控制(Selective harmonic current control based on multiple synchronous rotating coordinates)[J].中国电机工程学报(Proceedings of the CSEE),2010,30(3):55-62.
[6]武健,何娜,徐殿国,等(Wu Jian,He Na,Xu Dianguo,et al).重复控制在并联有源滤波器中的应用(Application of repetitive control technique in shunt active power filter)[J].中国电机工程学报(Proceedings of the CSEE),2008,28(18):66-72.
[7]Briz F,Garcia P,Degner M W,et al.Dynamic behavior of current controllers for selective harmonic compensation in three-phase active power filters[J].IEEE Trans on Industry Applications,2013,49(3):1411-1420.
[8]李雄杰(Li Xiongjie).VSC-HVDC系统交流输出中直流分量抑制的控制方法(Suppression Control Method of DC Component in the AC Output of the VSC-HVDC System)[D].长沙:长沙理工大学电气与信息工程学院(Changsha:School of Electrical and Information Engineering,Changsha University of Science and Technology),2012.
[9]李翠艳,张东纯,庄显义(Li Cuiyan,Zhang Dongchun,Zhuang Xianyi).重复控制综述(Repetitive control:A survey)[J].电机与控制学报(Electric Machines and Control),2005,9(1):37-44.
[10]耿攀,戴珂,魏学良,等(Geng Pan,Dai Ke,Wei Xueliang,et al).三相并联型有源电力滤波器电流重复控制(The repetitive control algorithm based current waveform correction for shunt active power filter)[J].电工技术学报(Transactions of China Electrotechnical Society),2007,22(2):127-131.
[11]王晓刚,谢运祥,王清,等(Wang Xiaogang,Xie Yun-xiang,Wang Qing,et al).并联型有源电力滤波器的延时补偿控制(Delay compensation control of shunt active power filter)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2012,24(4):64-70.
[12]杨昆,陈国柱(Yang Kun,Chen Guozhu).基于重复控制的DSTATCOM补偿电流控制(Compensation current control for DSTATCOM based on repetitive control)[J].电力系统自动化(Automation of Electric Power Systems),2013,37(10):80-85.
[13]赵莉华,雷晶晶,张亚超,等(Zhao Lihua,Lei Jingjing,Zhang Yachao,et al).谐波情况下电网无功补偿器容量算法的研究(Research on methods of reactive power compensation capacitor capacity in electric networks under harmonic conditions)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2016,28(6):68-72.