多通道三电平风力发电系统协同控制策略研究
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摘要
该文研究多通道二极管钳位型三电平风力发电系统控制策略,包括系统正常运行时电机侧和电网侧协同控制及电机绕组、器件故障时的容错运行方法。电机侧采用多相永磁同步发电机,设计基于最优转矩控制和空间矢量解耦的发电机矢量控制策略,提出解耦分组型多相三电平变流器空间矢量调制策略,在转矩产生平面采用前馈补偿电压控制方法消除耦合项,在谐波平面采用闭环比例谐振控制器,补偿电机参数不对称和反电动势引起的谐波电流。电网侧采用多通道三电平变流器并联结构,设计基于无功功率控制、直流侧电容电压控制的控制策略及基于零序电压注入的并联变流器环流抑制策略。此外,论文讨论多通道三电平风力发电系统故障状态下的容错运行方法。通过实验对提出的控制策略的有效性进行验证。
The control strategies of multi-channel diode neutral-point-clamping three-level wind power generation system were investigated, including the control strategies on machine side and grid side under normal condition and fault-tolerant operation under faults in machine windings and devices. The multiphase permanent magnet generator was adopted on machine side. The vector control scheme was proposed based on optimum torque control and vector space decoupling(VSD) on machine side. In particular, a decoupled VSD switching strategy was proposed for multi-channel three-level inverter. Hence, the voltage control method with feedforward compensation was designed on torque-generating subspace, and the closed-loop proportional resonant controller was designed on harmonic subspace, which can suppress the harmonic current components caused by asymmetry in machine parameters and harmonics in back EMF. The configuration of paralleled three-level converters was used on grid side, where the control schemes of reactive power regulation, DC link voltage control and circulating current suppression using zero-sequence voltage injection were designed. Besides, fault-tolerant control strategies were discussed for faulty conditions of multi-channel three-level wind power generation system. Finally, the experiments were presented to verify the validity of the proposed control schemes.
The control strategies of multi-channel diode neutral-point-clamping three-level wind power generation system were investigated, including the control strategies on machine side and grid side under normal condition and fault-tolerant operation under faults in machine windings and devices. The multiphase permanent magnet generator was adopted on machine side. The vector control scheme was proposed based on optimum torque control and vector space decoupling(VSD) on machine side. In particular, a decoupled VSD switching strategy was proposed for multi-channel three-level inverter. Hence, the voltage control method with feedforward compensation was designed on torque-generating subspace, and the closed-loop proportional resonant controller was designed on harmonic subspace, which can suppress the harmonic current components caused by asymmetry in machine parameters and harmonics in back EMF. The configuration of paralleled three-level converters was used on grid side, where the control schemes of reactive power regulation, DC link voltage control and circulating current suppression using zero-sequence voltage injection were designed. Besides, fault-tolerant control strategies were discussed for faulty conditions of multi-channel three-level wind power generation system. Finally, the experiments were presented to verify the validity of the proposed control schemes.
引文
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[11]Wang Fei,Wang Yong,Gao Qiang,et al.A control strategy for suppressing circulating currents in parallel-connected PMSM drives with individual DClinks[J].IEEE Transactions on Power Electronics,2016,31(2):1680-1691.
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[14]邢相洋,陈阿莲,张子成,等.并联T型三电平逆变器环流抑制和中点平衡研究[J].中国电机工程学报,2016,36(14):3909-3919.Xing Xiangyang,Chen Alian,Zhang Zicheng,et al.Investigation of circulating currents suppression and neutral point balancing in parallel three-level T-type inverters[J].Proceedings of the CSEE,2016,36(14):3909-3919(in Chinese).
[15]Abbas M A,Christen R,Jahns T M.Six-phase voltage source inverter driven induction motor[J].IEEETransactions on Industry Applications,1984,IA-20(5):1251-1259.
[16]欧阳红林,周马山,童调生.多相永磁同步电动机不对称运行的矢量控制[J].中国电机工程学报,2004,24(7):145-150.Ouyang Honglin,Zhou Mashan,Tong Tiaosheng.Vector control of multi-phase permanent magnet synchronous motor with asymmetric structure[J].Proceedings of the CESS,2004,24(7):145-150(in Chinese).
[17]Levi E.Multiphase electric machines for variable-speed applications[J].IEEE Transactions on Industrial Electronics,2008,55(5):1893-1909.
[18]Zhao Yifan,Lipo T A.Space vector PWM control of dual three-phase induction machine using vector space decomposition[J].IEEE Transactions on Industry Applications,1995,31(5):1100-1109.
[19]Wang Zheng,Wang Yibo,Chen Jian,et al.Decoupled vector space decomposition based space vector modulation for dual three-phase three-level motor drives[J].IEEE Transactions on Power Electronics,2018,33(12):10683-10697.
[20]Wang Zheng,Wang Yibo,Chen Jian,et al.Fault-tolerant control of NPC three-level inverters-fed double-statorwinding PMSM drives based on vector space decomposition[J].IEEE Transactions on Industrial Electronics,2017,64(11):8446-8458.
[2]马伟明,肖飞.风力发电变流器发展现状与展望[J].中国工程科学,2011,13(1):11-20.Ma Weiming,Xiao Fei.The status and outlook of wind power converters[J].Engineering Science,2011,13(1):11-20(in Chinese).
[3]Celanovic N,Boroyevich D.A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters[J].IEEE Transactions on Power Electronics,2000,15(2):242-249.
[4]Yamanaka K,Hava A M,Kirino H,et al.A novel neutral point potential stabilization technique using the information of output current polarities and voltage vector[J].IEEE Transactions on Industry Applications,2002,38(6):1572-1580.
[5]宋强,刘文华,严干贵,等.基于零序电压注入的三电平NPC逆变器中点电位平衡控制方法[J].中国电机工程学报,2004,24(5):57-62.Song Qiang,Liu Wenhua,Yan Gangui,et al.Aneutral-point potential balancing algorithm for three-level NPC inverters by using analytically injected zerosequence voltage[J].Proceedings of the CSEE,2004,24(5):57-62(in Chinese).
[6]Jiang Weidong,Du Shaowu,Chang Liuchen,et al.Hybrid PWM strategy of SVPWM and VSVPWM for NPCthree-level voltage-source inverter[J].IEEE Transactions on Power Electronics,2010,25(10):2607-2619.
[7]吴可丽,夏长亮,张云,等.二极管钳位型三电平逆变器共模电压抑制[J].电工技术学报,2015,30(24):110-117.Wu Keli,Xia Changliang,Zhang Yun,et al.Commonmode voltage suppression for neutral-point-clamped three-level inverter[J].Transactions of China Electrotechnical Society,2015,30(24):110-117(in Chinese).
[8]姜卫东,王群京,史晓锋,等.中点钳位型三电平逆变器在空间矢量调制时中点电位的低频振荡[J].中国电机工程学报,2009,29(3):49-55.Jiang Weidong,Wang Qunjing,Shi Xiaofeng,et al.Low frequency oscillation of neutral point voltage of neutral-point-clamped three-level VSI under SVPWMcontrol[J].Proceedings of the CSEE,2009,29(3):49-55(in Chinese).
[9]Bruckner T,Bernet S,Guldner H.The active NPCconverter and its loss-balancing control[J].IEEETransactions on Industrial Electronics,2005,52(3):855-868.
[10]Portillo R C,Prats M M,Leon J I,et al.Modeling strategy for back-to-back three-level converters applied to high-power wind turbines[J].IEEE Transactions on Industrial Electronics,2006,53(5):1483-1491.
[11]Wang Fei,Wang Yong,Gao Qiang,et al.A control strategy for suppressing circulating currents in parallel-connected PMSM drives with individual DClinks[J].IEEE Transactions on Power Electronics,2016,31(2):1680-1691.
[12]Li Jianlin,Hu Shuju,Li Mei,et al.Research on the application of parallel back-to-back PWM converter on direct-drive wind power system[C]//Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies,Nanjing,2008.
[13]Chen Mingliang,Wu Yuhan,Yuan Lei,et al.Current control method of six-phase PMSM drive system with parallel back-to-back converters[C]//17th International Conference on Electrical Machines and Systems,Hangzhou,2014.
[14]邢相洋,陈阿莲,张子成,等.并联T型三电平逆变器环流抑制和中点平衡研究[J].中国电机工程学报,2016,36(14):3909-3919.Xing Xiangyang,Chen Alian,Zhang Zicheng,et al.Investigation of circulating currents suppression and neutral point balancing in parallel three-level T-type inverters[J].Proceedings of the CSEE,2016,36(14):3909-3919(in Chinese).
[15]Abbas M A,Christen R,Jahns T M.Six-phase voltage source inverter driven induction motor[J].IEEETransactions on Industry Applications,1984,IA-20(5):1251-1259.
[16]欧阳红林,周马山,童调生.多相永磁同步电动机不对称运行的矢量控制[J].中国电机工程学报,2004,24(7):145-150.Ouyang Honglin,Zhou Mashan,Tong Tiaosheng.Vector control of multi-phase permanent magnet synchronous motor with asymmetric structure[J].Proceedings of the CESS,2004,24(7):145-150(in Chinese).
[17]Levi E.Multiphase electric machines for variable-speed applications[J].IEEE Transactions on Industrial Electronics,2008,55(5):1893-1909.
[18]Zhao Yifan,Lipo T A.Space vector PWM control of dual three-phase induction machine using vector space decomposition[J].IEEE Transactions on Industry Applications,1995,31(5):1100-1109.
[19]Wang Zheng,Wang Yibo,Chen Jian,et al.Decoupled vector space decomposition based space vector modulation for dual three-phase three-level motor drives[J].IEEE Transactions on Power Electronics,2018,33(12):10683-10697.
[20]Wang Zheng,Wang Yibo,Chen Jian,et al.Fault-tolerant control of NPC three-level inverters-fed double-statorwinding PMSM drives based on vector space decomposition[J].IEEE Transactions on Industrial Electronics,2017,64(11):8446-8458.