基于电流主动补偿和RSC被动保护的双馈风力发电机组故障穿越控制策略
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摘要
针对双馈感应发电机(DFIG)在故障穿越中存在的定转子侧过电流、直流母线过电压、电磁转矩和定子输出功率波动、转子侧变流器(RSC)遭受电流冲击等问题,本文在分析转子侧感应电动势的基础上,提出了电流主动补偿控制策略和RSC被动保护控制策略;两种控制策略分别通过将定子电流主动补偿为转子电流参考值和在转子回路串联动态电流阻抗器(DCR),来解决双馈风机在故障穿越中所存在的问题。所提控制策略提高了双馈感应发电机的故障穿越运行能力。最后,通过仿真验证了所提控制策略的有效性及可行性。
Aiming at the problems existing, in doubly fed induction generator over current at rotor and stator side, DC link overvoltage, electromagnetic torque, stator output power fluctuation and rotor-side converter subjected to current impulse during the ride through of the generator. Based on the analysis of rotor electromotive force, a current active compensation control strategy and the RSC passive protection control strategy are proposed. The two control strategies are designed to solve the problems of doubly fed induction generator and the series of dynamic current resistance(DCR) in the rotor loop. The proposed control strategies improve the fault traversing capability of doubly fed induction generators. Finally, the validity and feasibility of the proposed control strategy are verified by simulation.
Aiming at the problems existing, in doubly fed induction generator over current at rotor and stator side, DC link overvoltage, electromagnetic torque, stator output power fluctuation and rotor-side converter subjected to current impulse during the ride through of the generator. Based on the analysis of rotor electromotive force, a current active compensation control strategy and the RSC passive protection control strategy are proposed. The two control strategies are designed to solve the problems of doubly fed induction generator and the series of dynamic current resistance(DCR) in the rotor loop. The proposed control strategies improve the fault traversing capability of doubly fed induction generators. Finally, the validity and feasibility of the proposed control strategy are verified by simulation.
引文
[1]谢欢,吴涛,赵亚清,等.计及动态无功控制影响的风电汇集地区高电压脱网原因分析[J].电力系统自动化,2015,39(4):19-25.
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[11]梁智敏,高亮.提高双馈风电机组故障穿越能力的组合技术方案研究[J].电工电能新技术,2016,35(7):63-68.
[12]姚骏,郭利莎.采用串联网侧变换器的双馈风电系统不对称高电压穿越控制研究[J].电网技术,2016,40(7):2067-2074.
[13]JL opez,E Gubia,P Sanchis,et al.Wind turbines based on doubly fed induction generator under asymmetrical voltage dips[J].IEEE Transactions on Energy Conversion,2008,23(1):321-330.
[14]Sheng Hu,Xinchun Lin,Yong Kang,et al.An Improved Low-Voltage Ride-Through Control Strategy of Doubly Fed Induction Generator During Grid Faults[J].IEEE Transactions on Power Electronics,2011,26(12):3653-3665.
[15]HEPD Souza,F Bradaschia,FAS Neves,et al.Amethod for extracting the fundamental frequency positive-sequence voltage vector based on simple mathematical transformations[J].IEEETransactions on Industrial Electronics,2009,56(5):1539-1547.
[16]J Yang,JE Fletcher,J O Reilly.A series dynamic resistor based converter protection scheme for doubly fed induction generator during various fault conditions[J].IEEE Transactions on Energy Conversion,2010,25(2):422-432.
[2]赵宏博,姚良忠,王伟胜,等.大规模风电高压脱网分析及协调预防控制策略[J].电力系统自动化,2015,39(23):43-48.
[3]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].电机工程学报,2012,32(27):1-15.
[4]刘新刚,史波.双馈风电机组低电压穿越能力的研究[J].大电机技术,2012,25(6):28-32.
[5]张曼,姜惠兰.基于撬棒并联动态电阻的自适应双馈风力发电机低电压穿越[J].电工技术学报,2014,29(2):271-278.
[6]陈鉴庆,邹旭东.基于反向电流跟踪的双馈风机低电压穿越控制策略[J].电工技术学报,2016,31(2):221-229.
[7]Lima F K A,Luna A,Rodriguez P,et al.Rotor voltage dynamics in the doubly fed induction generator during grid faults[J].IEEE Transactions on Power Electronics,2010,25(1):118-130.
[8]Mohseni M,Is Iam S M.Transient control of DFIG-based wind power plants in compliance with power plants in compliance with the Australian grid code[J].IEEE Transactions on Power Electronics,2012,27(6):2813-2824.
[9]冯博,潘文霞,柯联锦,等.基于电池储能和Crowbar的风力发电机低电压穿越控制的研究[J].可再生能源,2013,31(4):35-40.
[10]程孟增,窦真兰,张建文,等.电压跌落时带有Crowbar电路的双馈感应发电机的瞬态分析[J].电网与清洁能源,2012,28(5):54-60.
[11]梁智敏,高亮.提高双馈风电机组故障穿越能力的组合技术方案研究[J].电工电能新技术,2016,35(7):63-68.
[12]姚骏,郭利莎.采用串联网侧变换器的双馈风电系统不对称高电压穿越控制研究[J].电网技术,2016,40(7):2067-2074.
[13]JL opez,E Gubia,P Sanchis,et al.Wind turbines based on doubly fed induction generator under asymmetrical voltage dips[J].IEEE Transactions on Energy Conversion,2008,23(1):321-330.
[14]Sheng Hu,Xinchun Lin,Yong Kang,et al.An Improved Low-Voltage Ride-Through Control Strategy of Doubly Fed Induction Generator During Grid Faults[J].IEEE Transactions on Power Electronics,2011,26(12):3653-3665.
[15]HEPD Souza,F Bradaschia,FAS Neves,et al.Amethod for extracting the fundamental frequency positive-sequence voltage vector based on simple mathematical transformations[J].IEEETransactions on Industrial Electronics,2009,56(5):1539-1547.
[16]J Yang,JE Fletcher,J O Reilly.A series dynamic resistor based converter protection scheme for doubly fed induction generator during various fault conditions[J].IEEE Transactions on Energy Conversion,2010,25(2):422-432.