指定次谐波补偿并联型有源滤波器电流重构限流策略
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摘要
针对有源滤波器指定次谐波补偿时负载谐波电流突增导致有源滤波器过流的现象,在并联型有源滤波器传统比例限流的基础上,提出了一种谐波电流重构的限流策略。本策略首先利用滑窗迭代FFT的方法,求出指定次谐波电流的幅值与相位,然后通过指定次谐波电流的叠加重构出被补偿的谐波电流,重构电流与比例系数之积作为新的参考电流参与并联型有源滤波器的控制。此方法可充分利用并联型有源滤波器的补偿能力,实现并联型有源滤波器的准确限流,并能使并联型有源滤波器在超出其补偿容量的系统中安全运行。仿真和试验结果验证了本方法的正确性与有效性。
When the specified sub-harmonic compensation of active power filter(APF) is performed, the load harmonic current jump will result in over-current of APF. In this paper, a current-limiting strategy for the reconstruction of harmonic current is proposed based on the traditional proportional current-limiting of shunt active power filter(SAPF).First, the amplitude and phase of the specified sub-harmonic current are obtained using the sliding window iterative FFT analysis under this strategy. Then, the compensated harmonic current is reconstructed by the superposition of the specified sub-harmonic current, and the product of the reconstructed current and the proportional coefficient is used as a new reference current for the control of SAPF. This method can make full use of the compensation capability of SAPF,thus realizing the accurate current-limiting of SAPF and ensuring its safe operation beyond the compensation capacity of the system. Simulation and experimental results verified the validity and effectiveness of the propose method.
When the specified sub-harmonic compensation of active power filter(APF) is performed, the load harmonic current jump will result in over-current of APF. In this paper, a current-limiting strategy for the reconstruction of harmonic current is proposed based on the traditional proportional current-limiting of shunt active power filter(SAPF).First, the amplitude and phase of the specified sub-harmonic current are obtained using the sliding window iterative FFT analysis under this strategy. Then, the compensated harmonic current is reconstructed by the superposition of the specified sub-harmonic current, and the product of the reconstructed current and the proportional coefficient is used as a new reference current for the control of SAPF. This method can make full use of the compensation capability of SAPF,thus realizing the accurate current-limiting of SAPF and ensuring its safe operation beyond the compensation capacity of the system. Simulation and experimental results verified the validity and effectiveness of the propose method.
引文
[1]陈乐柱,杜荣权,穆瑜.有源滤波器的最优安装点和检测点的研究[J].电源学报,2015,13(5):10-14.Chen Lezhu,Du Rongquan,Mu Yu.Research on optimal location and detection point of active power filter[J].Journal of Power Supply,2015,13(5):10-14(in Chinese).
[2]Verma V,Singh B.Design and implementation of a current-controlled parallel hybrid power filter[J].IEEE Transaction on Industry Applications,2009,45(5):1910-1917.
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[4]谢川,贺超,闫辉,等.基于频率自适应广义积分控制器选择性谐波电流控制策略[J].电工技术学报,2013,28(9):65-72.Xie Chuan,He Chao,Yan Hui,et al.Selective harmonic current control strategy based on frequency adaptive generalized integrators[J].Transactions of China Electrotechnical Society,2013,28(9):65-72(in Chinese).
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[7]梁旭,刘文华,朱庆翔.STATCOM保护系统新进展[J].电力系统自动化,2000,24(23):29-31.Liang Xu,Liu Wenhua,Zhu Qingxiang.New development of protection system of STATCOM[J].Automation of Electric Power Systems,2000,24(23):29-31(in Chinese).
[8]梁旭,刘文华,林峰.STATCOM保护系统设计[J].电力系统自动化,2000,24(23):32-35.Liang Xu,Liu Wenhua,Lin Feng.Design of protection system of STATCOM[J].Automation of Electric Power Systems,2000,24(23):32-35(in Chinese).
[9]陈玮,王彤,曾继伦.电网短路故障时并联型电力有源滤波器的过流保护[J].电力系统自动化,2002,26(9):59-62.Chen Wei,Wang Tong,Zeng Jilun.Research on the over current protection circuit of shunt APF[J].Automation of Electric Power Systems,2002,26(9):59-62(in Chinese).
[10]商少锋,朱东柏,刘骥.并联型有源电力滤波器的故障仿真及过流保护[J].哈尔滨理工大学学报,2005,10(1):58-62.Shang Shaofeng,Zhu Dongbai,Liu Ji.Simulation of active power filter in short-circuit faults and its over-current protection[J].Journal Harbin University of Science&Technology,2005,10(1):58-62(in Chinese).
[11]张树全,戴珂,谢斌,等.多同步旋转坐标系下指定次谐波控制[J].中国电机工程学报,2010,30(3):55-62.Zhang Shuquan,Dai Ke,Xie Bin,et al.Selective harmonic current control based on multiple synchronous rotating coordinates[J].Proceedings of the CSEE,2010,30(3):55-62(in Chinese).
[12]刘威葳,丁洪发,段献忠.有源电力滤波器选择性谐波电流控制策略[J].中国电机工程学报,2011,31(27):14-20.Liu Weiwei,Ding Hongfa,Duan Xianzhong.Selective harmonic current control strategy in active power filters[J].Proceedings of the CSEE,2011,31(27):14-20(in Chinese).
[13]张树全,戴珂,谢斌,等.并联型有源电力滤波器指定次无静差控制策略[J].电力电子,2009(3):33-38.Zhang Shuquan,Dai Ke,Xie Bin,et al.Seleetive harmonic zero-steady-error control for three phase shunt active power filter[J].Power Electronics,2009(3):33-38(in Chinese).
[2]Verma V,Singh B.Design and implementation of a current-controlled parallel hybrid power filter[J].IEEE Transaction on Industry Applications,2009,45(5):1910-1917.
[3]代高富,张春春,赵丹,林鹏峰.有源滤波器控制新策略[J].电源学报,2014,12(5):45-50.Dai Gaofu,Zhang Chunchun,Zhao Dan,Lin Pengfeng.Anew control strategy of active power filter[J].Journal of Power Supply,2014,12(5):45-50(in Chinese).
[4]谢川,贺超,闫辉,等.基于频率自适应广义积分控制器选择性谐波电流控制策略[J].电工技术学报,2013,28(9):65-72.Xie Chuan,He Chao,Yan Hui,et al.Selective harmonic current control strategy based on frequency adaptive generalized integrators[J].Transactions of China Electrotechnical Society,2013,28(9):65-72(in Chinese).
[5]Miret J,Castilla M,Matas J,et al.Selective harmoniccompensation control for single-phase active power filter with high harmonic rejection[J].IEEE Transactions on Industrial Electronics,2009,56(8):3117-3127.
[6]杨振宇,赵剑锋,唐国庆.并联型有源电力滤波器限流补偿策略研究[J].电力自动化设备,2006,26(3):21-25.Yang Zhenyu,Zhao Jianfeng,Tang Guoqing.Research on current limiting compensation scheme of shunt APF[J].Electric Power Automation Equipment,2006,26(3):21-25(in Chinese).
[7]梁旭,刘文华,朱庆翔.STATCOM保护系统新进展[J].电力系统自动化,2000,24(23):29-31.Liang Xu,Liu Wenhua,Zhu Qingxiang.New development of protection system of STATCOM[J].Automation of Electric Power Systems,2000,24(23):29-31(in Chinese).
[8]梁旭,刘文华,林峰.STATCOM保护系统设计[J].电力系统自动化,2000,24(23):32-35.Liang Xu,Liu Wenhua,Lin Feng.Design of protection system of STATCOM[J].Automation of Electric Power Systems,2000,24(23):32-35(in Chinese).
[9]陈玮,王彤,曾继伦.电网短路故障时并联型电力有源滤波器的过流保护[J].电力系统自动化,2002,26(9):59-62.Chen Wei,Wang Tong,Zeng Jilun.Research on the over current protection circuit of shunt APF[J].Automation of Electric Power Systems,2002,26(9):59-62(in Chinese).
[10]商少锋,朱东柏,刘骥.并联型有源电力滤波器的故障仿真及过流保护[J].哈尔滨理工大学学报,2005,10(1):58-62.Shang Shaofeng,Zhu Dongbai,Liu Ji.Simulation of active power filter in short-circuit faults and its over-current protection[J].Journal Harbin University of Science&Technology,2005,10(1):58-62(in Chinese).
[11]张树全,戴珂,谢斌,等.多同步旋转坐标系下指定次谐波控制[J].中国电机工程学报,2010,30(3):55-62.Zhang Shuquan,Dai Ke,Xie Bin,et al.Selective harmonic current control based on multiple synchronous rotating coordinates[J].Proceedings of the CSEE,2010,30(3):55-62(in Chinese).
[12]刘威葳,丁洪发,段献忠.有源电力滤波器选择性谐波电流控制策略[J].中国电机工程学报,2011,31(27):14-20.Liu Weiwei,Ding Hongfa,Duan Xianzhong.Selective harmonic current control strategy in active power filters[J].Proceedings of the CSEE,2011,31(27):14-20(in Chinese).
[13]张树全,戴珂,谢斌,等.并联型有源电力滤波器指定次无静差控制策略[J].电力电子,2009(3):33-38.Zhang Shuquan,Dai Ke,Xie Bin,et al.Seleetive harmonic zero-steady-error control for three phase shunt active power filter[J].Power Electronics,2009(3):33-38(in Chinese).