基于正负序迭代的配电网三相不平衡控制研究
|
摘要
配电网中三相负荷不平衡给设备及用户造成了很大的影响与危害,因此需要研发和应用针对负载三相电流不平衡的电力电子补偿装置。通过一种新的惯性低通滤波正负序迭代法提取负载电流的正负序分量和电感电流的正负序分量,然后通过PI控制和重复控制策略,实现了对负载三相电流的精准补偿。在仿真验证的理论模型的基础上,进行了样机的性能测试实验和现场挂网实验,结果证明了该方法和控制策略的可行性、有效性。
The three-phase load unbalance in distribution network has caused great impact and harm to the equipment and users.Therefore, it is necessary to develop and apply a power electronic compensation device for the unbalance of three-phase load current. In this paper, the positive and negative sequence components of the load current and the inductor current are extracted by a new low-pass filter positive and negative sequence iterative method. Then, the PI control and repetitive control strategy are used to accurately compensate the three-phase current of the load. Based on the theoretical model which is verified by simulation, the performance test and the on-site network experiment of the prototype were carried out. The results proved the feasibility and effectiveness of the method and the control strategy.
The three-phase load unbalance in distribution network has caused great impact and harm to the equipment and users.Therefore, it is necessary to develop and apply a power electronic compensation device for the unbalance of three-phase load current. In this paper, the positive and negative sequence components of the load current and the inductor current are extracted by a new low-pass filter positive and negative sequence iterative method. Then, the PI control and repetitive control strategy are used to accurately compensate the three-phase current of the load. Based on the theoretical model which is verified by simulation, the performance test and the on-site network experiment of the prototype were carried out. The results proved the feasibility and effectiveness of the method and the control strategy.
引文
[1]方恒福,盛万兴,王金丽,等.配电台区三相负荷不平衡实时在线治理方法研究[J].中国电机工程学报,2015,35(9):2185-2193.FANG Hengfu,SHENG Wanxing,WANG Jinli,et al.Research on the method for real-time online control of threephase unbalanced load in distribution area[J].Proceedings of the CSEE,2015,35(9):2185-2193.
[2]王守相,王成山.现代配电系统分析[M].2版.北京:高等教育出版社,2014:16-18.
[3]贝尼谢克.功率理论与电能质量治理[M].北京:机械工业出版社,2014:22.
[4]黄骏翅,曾江,杨清波.LCL型三电平并网逆变器无差拍控制[J].广东电力,2018,31(1):82-87.HUANG Junchi,ZENG Jiang,YANG Qingbo.Deadbeat control of LCL three-level grid-connected inverter[J].Guangdong Electric Power,2018,31(1):82-87.
[5]李勇,郭勇,皇甫星星,等.T型三电平逆变器的中点平衡建模与控制[J].电力工程技术,2017,36(2):61-65.LI Yong,GUO Yong,HUANGFU Xingxing,et al.Modeling and control of neutral point voltage balancing for T-type three-level inverters[J].Jiangsu Electrical Engineering,2017,36(2):61-65.
[6]赵新,金新民,杨捷,等.并网逆变器新型不平衡控制方案[J].电工技术学报,2014,29(S1):257-265.ZHAO Xin,JIN Xinmin,YANG Jie,et al.Novel unbalanced control scheme of grid-connected inverter[J].Transactions of China Electrotechnical Society,2014,29(S1):257-265.
[7]史经丛,安琪,陈建宇,等.基于三电平3D-SVPWM的四桥臂有源电力滤波器[J].电力电子技术,2015,49(5):96-98.SHI Jingcong,AN Qi,CHEN Jianyu,et al.Research on three-phase four-leg APF based on three-level 3D-SVPWM[J].Power Electronics,2015,49(5):96-98.
[8]XIA C L,SHAO H J,ZHANG Y,et al.Adjustable proportional hybrid SVPWM strategy for neutral-point-clamped three-level inverters[J].IEEE Transactions on Industrial Electronics,2013,60(10):4234-4242.
[9]LYU J G,YAO K,WU F Y,et al.Three-level saddle space vector pulse width modulation strategy based on two-level space vector pulse width modulation for neutral-point-clamped three-level inverters[J].IET Power Electronics,2016,9(5):874-882.
[10]赵龙龙,常国祥,李百宇,等.三电平SVPWM逆变器闭环控制研究及仿真[J].智慧电力,2017,45(10):8-12,18.ZHAO Longlong,CHANG Guoxiang,LI Baiyu,et al.Research and simulation of three-level inverter based on SVPWM closed-loop control method[J].Smart Power,2017,45(10):8-12,18.
[11]程晨,程志友,杨辉军,等.一种NPC三电平逆变器过调制中点电位控制方法[J].电测与仪表,2015,52(23):86-90,96.CHENG Chen,CHENG Zhiyou,YANG Huijun,et al.Aneutral-point voltage balancing over-modulation method of three-level NPC inverter[J].Electrical Measurement&Instrumentation,2015,52(23):86-90,96.
[12]潘元鑫.三相四线并联有源电力滤波器的性能分析[J].电子技术与软件工程,2014(10):158.
[13]许莹,许科生,罗义钊,等.配电网三相四桥臂有源电力滤波器控制研究[J].电力电子技术,2018,52(5):75-77.XU Ying,XU Kesheng,LUO Yizhao,et al.Research on the control strategy of three-phase four-leg active power filter in distribution network[J].Power Electronics,2018,52(5):75-77.
[14]邓惠华,李国良,周晓明,等.基于协调控制SVG的低压配网三相负荷不平衡治理技术[J].电工技术学报.2017,32(S1):75-83.DENG Huihua,LI Guoliang,ZHOU Xiaoming,et al.Three-phase load unbalance treatment technology for lowvoltage distribution network based on coordinated control of SVG[J].Transactions of China Electrotechnical Society,2017,32(S1):75-83.
[15]巩兆伟.三相光伏低电压穿越的正负序分离优化控制[J].西安工业大学学报,2016,36(12):1013-1017.GONG Zhaowei,.Optimal control of positive and negative sequence separation for three phase photovoltaic low voltage ride through capability[J].Journal of Xi’an Technological University,2016,36(12):1013-1017.
[16]李彦林,王乐三,许胜,等.基于一阶矢量谐振器的基波正负序分量及谐波检测方法[J].高电压技术,2018,44(10):3399-3406.LI Yanlin,WANG Lesan,XU Sheng,et al.The fundamental positive and negative sequence components and harmonic detection method based on first-order vector resonator[J].High Voltage Technology,2018,44(10):3399-3406.
[17]郭凯,程启明,程尹曼,等.基于改进型软件锁相环的正负序分量分离新方法研究[J].电测与仪表,2017,54(2):12-17.GUO Kai,CHENG Qiming,CHENG Yinman,et al.Study on the new method of positive and negative sequence component separation based on improved software phaselocked loop[J].Electrical Measurement&Instrumentation,2017,54(2):12-17.
[18]ZHANG B,ZHOU K,WANG D.Multirate repetitive control for PWM DC/AC converters[J].IEEE Transactions on Industrial Electronics,2013,61(6):2883-2890.
[19]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.
[20]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.
[2]王守相,王成山.现代配电系统分析[M].2版.北京:高等教育出版社,2014:16-18.
[3]贝尼谢克.功率理论与电能质量治理[M].北京:机械工业出版社,2014:22.
[4]黄骏翅,曾江,杨清波.LCL型三电平并网逆变器无差拍控制[J].广东电力,2018,31(1):82-87.HUANG Junchi,ZENG Jiang,YANG Qingbo.Deadbeat control of LCL three-level grid-connected inverter[J].Guangdong Electric Power,2018,31(1):82-87.
[5]李勇,郭勇,皇甫星星,等.T型三电平逆变器的中点平衡建模与控制[J].电力工程技术,2017,36(2):61-65.LI Yong,GUO Yong,HUANGFU Xingxing,et al.Modeling and control of neutral point voltage balancing for T-type three-level inverters[J].Jiangsu Electrical Engineering,2017,36(2):61-65.
[6]赵新,金新民,杨捷,等.并网逆变器新型不平衡控制方案[J].电工技术学报,2014,29(S1):257-265.ZHAO Xin,JIN Xinmin,YANG Jie,et al.Novel unbalanced control scheme of grid-connected inverter[J].Transactions of China Electrotechnical Society,2014,29(S1):257-265.
[7]史经丛,安琪,陈建宇,等.基于三电平3D-SVPWM的四桥臂有源电力滤波器[J].电力电子技术,2015,49(5):96-98.SHI Jingcong,AN Qi,CHEN Jianyu,et al.Research on three-phase four-leg APF based on three-level 3D-SVPWM[J].Power Electronics,2015,49(5):96-98.
[8]XIA C L,SHAO H J,ZHANG Y,et al.Adjustable proportional hybrid SVPWM strategy for neutral-point-clamped three-level inverters[J].IEEE Transactions on Industrial Electronics,2013,60(10):4234-4242.
[9]LYU J G,YAO K,WU F Y,et al.Three-level saddle space vector pulse width modulation strategy based on two-level space vector pulse width modulation for neutral-point-clamped three-level inverters[J].IET Power Electronics,2016,9(5):874-882.
[10]赵龙龙,常国祥,李百宇,等.三电平SVPWM逆变器闭环控制研究及仿真[J].智慧电力,2017,45(10):8-12,18.ZHAO Longlong,CHANG Guoxiang,LI Baiyu,et al.Research and simulation of three-level inverter based on SVPWM closed-loop control method[J].Smart Power,2017,45(10):8-12,18.
[11]程晨,程志友,杨辉军,等.一种NPC三电平逆变器过调制中点电位控制方法[J].电测与仪表,2015,52(23):86-90,96.CHENG Chen,CHENG Zhiyou,YANG Huijun,et al.Aneutral-point voltage balancing over-modulation method of three-level NPC inverter[J].Electrical Measurement&Instrumentation,2015,52(23):86-90,96.
[12]潘元鑫.三相四线并联有源电力滤波器的性能分析[J].电子技术与软件工程,2014(10):158.
[13]许莹,许科生,罗义钊,等.配电网三相四桥臂有源电力滤波器控制研究[J].电力电子技术,2018,52(5):75-77.XU Ying,XU Kesheng,LUO Yizhao,et al.Research on the control strategy of three-phase four-leg active power filter in distribution network[J].Power Electronics,2018,52(5):75-77.
[14]邓惠华,李国良,周晓明,等.基于协调控制SVG的低压配网三相负荷不平衡治理技术[J].电工技术学报.2017,32(S1):75-83.DENG Huihua,LI Guoliang,ZHOU Xiaoming,et al.Three-phase load unbalance treatment technology for lowvoltage distribution network based on coordinated control of SVG[J].Transactions of China Electrotechnical Society,2017,32(S1):75-83.
[15]巩兆伟.三相光伏低电压穿越的正负序分离优化控制[J].西安工业大学学报,2016,36(12):1013-1017.GONG Zhaowei,.Optimal control of positive and negative sequence separation for three phase photovoltaic low voltage ride through capability[J].Journal of Xi’an Technological University,2016,36(12):1013-1017.
[16]李彦林,王乐三,许胜,等.基于一阶矢量谐振器的基波正负序分量及谐波检测方法[J].高电压技术,2018,44(10):3399-3406.LI Yanlin,WANG Lesan,XU Sheng,et al.The fundamental positive and negative sequence components and harmonic detection method based on first-order vector resonator[J].High Voltage Technology,2018,44(10):3399-3406.
[17]郭凯,程启明,程尹曼,等.基于改进型软件锁相环的正负序分量分离新方法研究[J].电测与仪表,2017,54(2):12-17.GUO Kai,CHENG Qiming,CHENG Yinman,et al.Study on the new method of positive and negative sequence component separation based on improved software phaselocked loop[J].Electrical Measurement&Instrumentation,2017,54(2):12-17.
[18]ZHANG B,ZHOU K,WANG D.Multirate repetitive control for PWM DC/AC converters[J].IEEE Transactions on Industrial Electronics,2013,61(6):2883-2890.
[19]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.
[20]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.