环形配电网的分频调节阻性有源电力滤波器位置策略
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摘要
通过理论分析环形配电网的谐波放大原理,对比安装在线路中点且阻抗匹配的阻性有源电力滤波器(RAPF)和对称安装在不同位置的分频调节RAPF的抑制效果,提出了一种适用于环形配电网的分频调节RAPF的位置策略。若线路长度小于谐波波长的1/2,靠近线路中点的对称位置为最优安装位置;若线路长度大于谐波波长的1/2,距谐波源1/4波长的对称位置为最优安装位置。与安装在线路中点且阻抗匹配的RAPF相比,安装在最优位置的分频调节RAPF,当其电导增益≥匹配的电导时,均能有效地衰减谐波,获得更好的抑制效果;且电导增益越大,谐波抑制效果越好。同时,该方案对线路参数的改变具有更好的适应性。仿真和实验结果验证了该方案的有效性。
This paper analyzes the harmonic resonance theory according to the distributed parameter model of the loop feeder. Through the comparisons of the harmonic damping effects between resistive active power filter(RAPF) installed on middle bus and that symmetrically deployed on different locations, this paper proposes a site selection strategy of discrete frequency tuned RAPF to dampen harmonic propagation in loop power distribution systems. Specifically, the proposed site selection strategy notes that if the feeder length is shorter than half wavelength, the optimal installation location should be symmetrical location close to the middle point; otherwise, if the feeder length is longer than half wavelength, the optimal installation location should be symmetrical position which is a quarter wavelength away from the source. Compared with the case when the RAPF with matching impedance is installed on the middle bus of the loop line, it can achieve better harmonic attenuation effect to install discrete frequency tuned RAPF whose conductance is no less than the matching conductance. Moreover, bigger conductance leads to better damping result. Besides, the proposed strategy shows better adaptability to the variations of line parameters. Simulation and experimental results verify the validity of the proposed strategy.
This paper analyzes the harmonic resonance theory according to the distributed parameter model of the loop feeder. Through the comparisons of the harmonic damping effects between resistive active power filter(RAPF) installed on middle bus and that symmetrically deployed on different locations, this paper proposes a site selection strategy of discrete frequency tuned RAPF to dampen harmonic propagation in loop power distribution systems. Specifically, the proposed site selection strategy notes that if the feeder length is shorter than half wavelength, the optimal installation location should be symmetrical location close to the middle point; otherwise, if the feeder length is longer than half wavelength, the optimal installation location should be symmetrical position which is a quarter wavelength away from the source. Compared with the case when the RAPF with matching impedance is installed on the middle bus of the loop line, it can achieve better harmonic attenuation effect to install discrete frequency tuned RAPF whose conductance is no less than the matching conductance. Moreover, bigger conductance leads to better damping result. Besides, the proposed strategy shows better adaptability to the variations of line parameters. Simulation and experimental results verify the validity of the proposed strategy.
引文
[1]Chen T H,Hung W T,Gu J C,et al.Feasibility study of upgrading primary feeders from radial and openloop to normally closed-loop arrangement[J].IEEE Transactions on Power Systems,2004,19(3):1308-1316.
[2]Lee T L,Hu S H.Discrete frequency-tuning active filter to suppress harmonic resonances of closed-loop distribution power systems[J].IEEE Transactions on Power Electronics,2011,26(1):137-148.
[3]代高富,赵丹,林鹏峰,等.基于MMC拓扑的有源滤波器控制策略研究[J].电力系统保护与控制,2015,43(8):74-80.Dai Gaofu,Zhao Dan,Lin Pengfeng,et al.Study of control strategy for active power filter based on modular multilevel converter[J].Power System Protection and Control,2015,43(8):74-80.
[4]侯睿,武健,徐殿国.并联有源滤波器LCL滤波器特性分析及设计方法[J].电工技术学报,2014,29(10):191-199.Hou Rui,Wu Jian,Xu Dianguo.Characteristics and design methods of LCL filter in shunt active power filter[J].Transactions of China Electrotechnical Society,2014,29(10):191-199.
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[6]张宸宇,梅军,郑建勇,等.基于内置重复控制器改进无差拍的有源滤波器双滞环控制方法[J].电工技术学报,2015,30(22):124-132.Zhang Chenyu,Mei Jun,Zheng Jianyong,et al.Active power filter double hysteresis method with improved deadbeat control based on built-in repetitive controller[J].Transactions of China Electrotechnical Society,2015,30(22):124-132.
[7]Wada K,Fujita H,Akagi H.Considerations of a shunt active filter based on voltage detection for installation on a long distribution feeder[J].IEEE Transactions on Industry Applications,2002,38(4):1123-1130.
[8]Jintakosonwit P,Akagi H,Fujita H,et al.Implementation and performance of automatic gain adjustment in a shunt active filter for harmonic damping throughout a power distribution system[J].IEEE Transactions on Power Electronics,2002,17(3):438-447.
[9]Lee T L,Cheng P T.A harmonic damping method for a loop power system[C]//IEEE Industry Applications Society Annual Meeting,Edmonton,Alta,2008:1-8.
[10]张树全,戴珂,谢斌,等.并联型有源电力滤波器按容量比例分频段补偿并联控制策略[J].电工技术学报,2010,25(9):115-121.Zhang Shuquan,Dai Ke,Xie Bin,et al.Parallel control of shunt active power filters with capacity proportion frequency allocation compensation[J].Transactions of China Electrotechnical Society,2010,25(9):115-121.
[11]Jintakosonwit P,Akagi H,Fujita H,et al.Implementation and performance of cooperative control of shunt active filters for harmonic damping throughout a power distribution system[J].IEEE Transactions on Industry Applications,2003,39(2):556-564.
[12]Cheng P T,Lee T L.Analysis of harmonic damping effect of the distributed active filter system[J].IEEE Transactions on Industry Applications,2006,126(5):605-614.
[13]Cheng P T,Lee T L.Distributed active filter systems(DAFSs):a new approach to power system harmonics[J].IEEE Transactions on Industry Applications,2006,42(5):1301-1309.
[14]Cheng P T,Lee T L,Akagi H.A dynamic tuning method for distributed active filter systems[J].IEEE Transactions on Industry Applications,2008,44(2):612-622.
[15]孙孝峰,曾健,张芳,等.阻性有源滤波器分频控制位置的选择方案[J].中国电机工程学报,2011,31(28):65-70.Sun Xiaofeng,Zeng Jian,Zhang Fang,et al.Site selection strategy of discrete frequency resistive active power filter[J].Proceedings of the CSEE,2011,31(28):65-70.
[2]Lee T L,Hu S H.Discrete frequency-tuning active filter to suppress harmonic resonances of closed-loop distribution power systems[J].IEEE Transactions on Power Electronics,2011,26(1):137-148.
[3]代高富,赵丹,林鹏峰,等.基于MMC拓扑的有源滤波器控制策略研究[J].电力系统保护与控制,2015,43(8):74-80.Dai Gaofu,Zhao Dan,Lin Pengfeng,et al.Study of control strategy for active power filter based on modular multilevel converter[J].Power System Protection and Control,2015,43(8):74-80.
[4]侯睿,武健,徐殿国.并联有源滤波器LCL滤波器特性分析及设计方法[J].电工技术学报,2014,29(10):191-199.Hou Rui,Wu Jian,Xu Dianguo.Characteristics and design methods of LCL filter in shunt active power filter[J].Transactions of China Electrotechnical Society,2014,29(10):191-199.
[5]陈仲,王志辉,陈淼.基于新型四象限开关单元的并联型有源滤波器[J].电工技术学报,2015,30(4):147-154.Chen Zhong,Wang Zhihui,Chen Miao.Shunt active power filter based on new four-quadrant switch cell[J].Transactions of China Electrotechnical Society,2015,30(4):147-154.
[6]张宸宇,梅军,郑建勇,等.基于内置重复控制器改进无差拍的有源滤波器双滞环控制方法[J].电工技术学报,2015,30(22):124-132.Zhang Chenyu,Mei Jun,Zheng Jianyong,et al.Active power filter double hysteresis method with improved deadbeat control based on built-in repetitive controller[J].Transactions of China Electrotechnical Society,2015,30(22):124-132.
[7]Wada K,Fujita H,Akagi H.Considerations of a shunt active filter based on voltage detection for installation on a long distribution feeder[J].IEEE Transactions on Industry Applications,2002,38(4):1123-1130.
[8]Jintakosonwit P,Akagi H,Fujita H,et al.Implementation and performance of automatic gain adjustment in a shunt active filter for harmonic damping throughout a power distribution system[J].IEEE Transactions on Power Electronics,2002,17(3):438-447.
[9]Lee T L,Cheng P T.A harmonic damping method for a loop power system[C]//IEEE Industry Applications Society Annual Meeting,Edmonton,Alta,2008:1-8.
[10]张树全,戴珂,谢斌,等.并联型有源电力滤波器按容量比例分频段补偿并联控制策略[J].电工技术学报,2010,25(9):115-121.Zhang Shuquan,Dai Ke,Xie Bin,et al.Parallel control of shunt active power filters with capacity proportion frequency allocation compensation[J].Transactions of China Electrotechnical Society,2010,25(9):115-121.
[11]Jintakosonwit P,Akagi H,Fujita H,et al.Implementation and performance of cooperative control of shunt active filters for harmonic damping throughout a power distribution system[J].IEEE Transactions on Industry Applications,2003,39(2):556-564.
[12]Cheng P T,Lee T L.Analysis of harmonic damping effect of the distributed active filter system[J].IEEE Transactions on Industry Applications,2006,126(5):605-614.
[13]Cheng P T,Lee T L.Distributed active filter systems(DAFSs):a new approach to power system harmonics[J].IEEE Transactions on Industry Applications,2006,42(5):1301-1309.
[14]Cheng P T,Lee T L,Akagi H.A dynamic tuning method for distributed active filter systems[J].IEEE Transactions on Industry Applications,2008,44(2):612-622.
[15]孙孝峰,曾健,张芳,等.阻性有源滤波器分频控制位置的选择方案[J].中国电机工程学报,2011,31(28):65-70.Sun Xiaofeng,Zeng Jian,Zhang Fang,et al.Site selection strategy of discrete frequency resistive active power filter[J].Proceedings of the CSEE,2011,31(28):65-70.