基于功率因数可控的双馈异步风力发电系统研究
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摘要
主要针对风能转换率低、风速变化发电频率不稳定、功率因数难以控制的问题,以双馈电机为对象,采用双PWM换流器控制,利用转子侧换流器和电网侧换流器进行协同控制,实现定子电流变速恒频。此外,在控制系统中采用了坐标变换和空间矢量调制算法,实现了功率因数可控,改善了目前电网电压存在负载突降所导致的不利情况。建立了相应的仿真模型,验证了系统的正确性与可行性。
This paper mainly focuses on the problems of low conversion rate of wind energy, unstable frequency of power generation and uncontrollable power factor when wind speed changes, takes the double-fed machine as the object, uses the double PWM converter to control it, and uses rotor side converter and grid side converter to implement stator current variable speed constant frequency. What's more, coordinate transformation and space vector modulation algorithm are used in the control system to realize controllable power factor,improving unfavorable situation caused by sudden drop of load. Furthermore, the simulation model is established to verify the correctness and feasibility of the system.
This paper mainly focuses on the problems of low conversion rate of wind energy, unstable frequency of power generation and uncontrollable power factor when wind speed changes, takes the double-fed machine as the object, uses the double PWM converter to control it, and uses rotor side converter and grid side converter to implement stator current variable speed constant frequency. What's more, coordinate transformation and space vector modulation algorithm are used in the control system to realize controllable power factor,improving unfavorable situation caused by sudden drop of load. Furthermore, the simulation model is established to verify the correctness and feasibility of the system.
引文
[1]贺益康,胡家兵.双馈异步风力发电机并网运行中的几个热点问题[J].中国电机工程学报,2012,32(27):13-15.
[2]訾鹏,周孝信,田芳,等.双馈式风力发电机的机电暂态建模[J].中国电机工程学报,2015,35(5):1106-1114.
[3]罗少杰,朱玲.电网电压骤升情况下双馈变流器控制策略研究[J].电力系统保护与控制,2017(24):123-129.
[4]杨淑英.双馈型风力发电变流器及其控制[D].合肥工业大学, 2007.
[5]陆畅,周志锋,智勇军.基于定子磁链定向的双馈风力发电系统仿真分析[J].电器与能效管理技术,2016(23):32-40.
[6]Beltran B, Benbouzid M, Ahmed-Ali T, et al. DFIG-based wind turbine robust control using high-order sliding modes and a high gain observer[J]. International Review on Modelling&Simulations, 2011, 4(3):1148-1155.
[7]Hughes F M, Anaya-Lara O, Jenkins N, et al. Control of DFIGbased wind generation for power network support[J]. IEEE Transactions on Power Systems, 2005, 20(4):1958-1966.
[8]Xu L, Yao L, Sasse C. Grid integration of large DFIG-based wind farms using VSC transmission[J]. IEEE Transactions on Power Systems, 2007, 22(3):976-984.
[9]Hu J, He Y, Xu L, et al. Improved control of DFIG systems during network unbalance using PI-R current regulators[J]. IEEE Transactions on Industrial Electronics, 2009, 56(2):439-451.
[10]杜文娟,陈骁,王海风,等.DFIG无功/电压控制影响机电振荡模式的近似判定指标[J].中国电机工程学报,2017,37(3):720-727.
[11]梅意安.双馈异步电机双PWM变流器控制的仿真研究[D].武汉:华中科技大学,2011.
[2]訾鹏,周孝信,田芳,等.双馈式风力发电机的机电暂态建模[J].中国电机工程学报,2015,35(5):1106-1114.
[3]罗少杰,朱玲.电网电压骤升情况下双馈变流器控制策略研究[J].电力系统保护与控制,2017(24):123-129.
[4]杨淑英.双馈型风力发电变流器及其控制[D].合肥工业大学, 2007.
[5]陆畅,周志锋,智勇军.基于定子磁链定向的双馈风力发电系统仿真分析[J].电器与能效管理技术,2016(23):32-40.
[6]Beltran B, Benbouzid M, Ahmed-Ali T, et al. DFIG-based wind turbine robust control using high-order sliding modes and a high gain observer[J]. International Review on Modelling&Simulations, 2011, 4(3):1148-1155.
[7]Hughes F M, Anaya-Lara O, Jenkins N, et al. Control of DFIGbased wind generation for power network support[J]. IEEE Transactions on Power Systems, 2005, 20(4):1958-1966.
[8]Xu L, Yao L, Sasse C. Grid integration of large DFIG-based wind farms using VSC transmission[J]. IEEE Transactions on Power Systems, 2007, 22(3):976-984.
[9]Hu J, He Y, Xu L, et al. Improved control of DFIG systems during network unbalance using PI-R current regulators[J]. IEEE Transactions on Industrial Electronics, 2009, 56(2):439-451.
[10]杜文娟,陈骁,王海风,等.DFIG无功/电压控制影响机电振荡模式的近似判定指标[J].中国电机工程学报,2017,37(3):720-727.
[11]梅意安.双馈异步电机双PWM变流器控制的仿真研究[D].武汉:华中科技大学,2011.