弱电网下整流器控制策略研究
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摘要
为了消除弱电网情况下直流侧电压纹波和输入电流畸变,本文提出一种新型比例谐振和比例积分控制方法。首先应用解耦同步方法实现正序和负序电压分离,然后在电网不平衡条件下采用比例谐振控制器和比例积分控制,实现整流器输入电流快速跟踪控制和直流侧电压波动。上述方法基于abc静止坐标系,能够减小控制的复杂度和输入电流畸变。针对三电平整流器中点不平衡问题,本文采用改变零序分量方法实现中点平衡控制。实验结果表明,电网不平衡下和正常电网情况下均能够准确跟踪给定电流和减少直流侧电压纹波。
In order to eliminate weak grid case dc voltage ripple and the input current distortion, this paper puts forward a new kind of proportional resonance control method. First decoupling synchronization method is applied to implement the positive sequence and negative sequence voltage separation, and then under the condition of unbalanced power grid using proportional resonant controller and the pi control, realize the rectifier input current fast tracking control and dc side voltage fluctuation. The method based on ABC static coordinate system, the ability to reduce the complexity of the control and input current distortion. In view of the three-level rectifier midpoint imbalance, this paper uses the change of zero sequence component method to achieve the balance point and control. The Experimenal results show that under the unbalanced power grid and grid normally are able to accurately track the given current and dc side voltage ripple.
In order to eliminate weak grid case dc voltage ripple and the input current distortion, this paper puts forward a new kind of proportional resonance control method. First decoupling synchronization method is applied to implement the positive sequence and negative sequence voltage separation, and then under the condition of unbalanced power grid using proportional resonant controller and the pi control, realize the rectifier input current fast tracking control and dc side voltage fluctuation. The method based on ABC static coordinate system, the ability to reduce the complexity of the control and input current distortion. In view of the three-level rectifier midpoint imbalance, this paper uses the change of zero sequence component method to achieve the balance point and control. The Experimenal results show that under the unbalanced power grid and grid normally are able to accurately track the given current and dc side voltage ripple.
引文
[1] J.W.Kolar and T.Friedli.The essence of three-phase PFC rectifier systems—Part I.IEEE Trans.Power Electron.2013,28(1):176-198.
[2] T.Friedli,M.Hartmann,J.W.Kolar.The essence of three-phase PFC rectifier systems—Part II.IEEE Trans.Power Electron.2014,29(2):543-560.
[3] A S.Eren,M.Pahlevaninezhad,A.Bakhshai,et al.Composite nonlinear feedback control and stability analysis of a grid-gonnected voltage source inverter with LCL filter.IEEE Trans.Ind.Electron,2013,60(11):5059-5074.
[4] X.S.Li,Z.Q.Deng,Z.D.Chen,et al.Analysis and simplification of three-dimensional space vector PWM for three-phase fourleg inverters.IEEE Trans.Ind.Electron,2011,58(2):450-464.
[5] F.A.S.N Eves,H.E.P.de Souza,M.C.Cavalcanti,et al.Digital filters for fast harmonic sequence component separation of unbalanced and distorted three-phase signals.IEEE Trans.Ind.Electron,2012,59(10):3847-3859.
[6] 武健,何娜,徐殿国.重复控制在并联有源滤波器中的应用[J].中国电机工程学报,2008,28(18):66-71.
[7] 王成智,邹旭东,许赟,等.采用改进重复控制的大功率电力电子负载[J].中国电机工程学报,2009,29(12):1-9.
[8] Y.Kim,W.Sung,B.Lee.Comparative performance analysis of high density and efficiency PFC topologies.IEEE Trans.Ind.Electron,2014,29(6):2666-2679.
[9] J.W.Kolar,F.C.Zach.A novel three-phase utility interface minimizing line current harmonics of high-power telecommunications rectifier modules.IEEE Trans.Ind.Electron,1997,44(4):456-467.
[10] F.Stogerer,J.Minibock,J.W.Kolar.Implementation of a novel control concept for reliable operation of Vienna rectifier under heavily unbalanced mains voltage conditions,” in Proc.IEEE Power Electron.Spec.Conf,2001:1333-1338.
[11] C.R.Baier,J.R.Espinoza,J.A.Munoz.A high-performance multicell topology based on single-phase power cells for three-phase systems operating under unbalanced ac mains and asymmetrical loads.IEEE Trans.Ind.Electron,2010,57(8):2730- 2738.
[12] J.Minibock,J.W.Kolar.Novel concept for mains voltage proportional input current shaping of a VIENNA rectifier eliminating controller multipliers.IEEE Trans.Ind.Electron,2005,52(1):162-170.
[13] F.Stogerer,J.Minibock,J.W.Kolar.A novel concept for mains voltage proportional input current shaping of a VIENNA rectifier eliminating controller multipliers.Part II:Operation for heavily unbalanced mains phase voltages and in wide input voltage range.in Proc.IEEE Appl.Power Electron.Conf.Expo,2001:587-591.
[14] Z.Li,et al.Control of three-phase Boost-type PWM rectifier in stationary frame under unbalanced input voltage,” IEEE Trans.Power Electron,2010,25(10):2521-2530.
[15] F.Gonzalez-Espin,E.Figueres,G.Garcera.An adaptive synchronous-reference-frame phase-locked loop for power quality improvement in a polluted utility grid.IEEE Trans.Ind.Electron,2012,59(6):2718-2731.
[16] G.Radomski.Voltage space vector control system of Vienna rectifier I.in Proc.IEEE Int.Conf.“Comput.Tool”,2007:1666-1673.
[17] T.Viitanen,H.Tuusa.Space vectormodulation and control of a unidirectional three-phase/level/switch VIENNA I rectifier with LCL-type AC filter.in Proc.IEEE Power Electron.Spec.Conf,2003:1063-1068.
[18] J.Alahuhtala,J.Virtakoivu,T.Viitanen,et al.Space vector modulated and vector controlled Vienna I rectifier with active filter function.in Proc.IEEJ-IEEE 4th Power Conv.Conf,2007:52-68.
[19] P.Rodríguez,et al.Decoupled double synchronous reference frame PLL for power converters control,” IEEE Trans.Power Electron,2007,22(2):584-592.
[2] T.Friedli,M.Hartmann,J.W.Kolar.The essence of three-phase PFC rectifier systems—Part II.IEEE Trans.Power Electron.2014,29(2):543-560.
[3] A S.Eren,M.Pahlevaninezhad,A.Bakhshai,et al.Composite nonlinear feedback control and stability analysis of a grid-gonnected voltage source inverter with LCL filter.IEEE Trans.Ind.Electron,2013,60(11):5059-5074.
[4] X.S.Li,Z.Q.Deng,Z.D.Chen,et al.Analysis and simplification of three-dimensional space vector PWM for three-phase fourleg inverters.IEEE Trans.Ind.Electron,2011,58(2):450-464.
[5] F.A.S.N Eves,H.E.P.de Souza,M.C.Cavalcanti,et al.Digital filters for fast harmonic sequence component separation of unbalanced and distorted three-phase signals.IEEE Trans.Ind.Electron,2012,59(10):3847-3859.
[6] 武健,何娜,徐殿国.重复控制在并联有源滤波器中的应用[J].中国电机工程学报,2008,28(18):66-71.
[7] 王成智,邹旭东,许赟,等.采用改进重复控制的大功率电力电子负载[J].中国电机工程学报,2009,29(12):1-9.
[8] Y.Kim,W.Sung,B.Lee.Comparative performance analysis of high density and efficiency PFC topologies.IEEE Trans.Ind.Electron,2014,29(6):2666-2679.
[9] J.W.Kolar,F.C.Zach.A novel three-phase utility interface minimizing line current harmonics of high-power telecommunications rectifier modules.IEEE Trans.Ind.Electron,1997,44(4):456-467.
[10] F.Stogerer,J.Minibock,J.W.Kolar.Implementation of a novel control concept for reliable operation of Vienna rectifier under heavily unbalanced mains voltage conditions,” in Proc.IEEE Power Electron.Spec.Conf,2001:1333-1338.
[11] C.R.Baier,J.R.Espinoza,J.A.Munoz.A high-performance multicell topology based on single-phase power cells for three-phase systems operating under unbalanced ac mains and asymmetrical loads.IEEE Trans.Ind.Electron,2010,57(8):2730- 2738.
[12] J.Minibock,J.W.Kolar.Novel concept for mains voltage proportional input current shaping of a VIENNA rectifier eliminating controller multipliers.IEEE Trans.Ind.Electron,2005,52(1):162-170.
[13] F.Stogerer,J.Minibock,J.W.Kolar.A novel concept for mains voltage proportional input current shaping of a VIENNA rectifier eliminating controller multipliers.Part II:Operation for heavily unbalanced mains phase voltages and in wide input voltage range.in Proc.IEEE Appl.Power Electron.Conf.Expo,2001:587-591.
[14] Z.Li,et al.Control of three-phase Boost-type PWM rectifier in stationary frame under unbalanced input voltage,” IEEE Trans.Power Electron,2010,25(10):2521-2530.
[15] F.Gonzalez-Espin,E.Figueres,G.Garcera.An adaptive synchronous-reference-frame phase-locked loop for power quality improvement in a polluted utility grid.IEEE Trans.Ind.Electron,2012,59(6):2718-2731.
[16] G.Radomski.Voltage space vector control system of Vienna rectifier I.in Proc.IEEE Int.Conf.“Comput.Tool”,2007:1666-1673.
[17] T.Viitanen,H.Tuusa.Space vectormodulation and control of a unidirectional three-phase/level/switch VIENNA I rectifier with LCL-type AC filter.in Proc.IEEE Power Electron.Spec.Conf,2003:1063-1068.
[18] J.Alahuhtala,J.Virtakoivu,T.Viitanen,et al.Space vector modulated and vector controlled Vienna I rectifier with active filter function.in Proc.IEEJ-IEEE 4th Power Conv.Conf,2007:52-68.
[19] P.Rodríguez,et al.Decoupled double synchronous reference frame PLL for power converters control,” IEEE Trans.Power Electron,2007,22(2):584-592.