基于阻抗模型的双馈风力发电机高频谐振机理分析
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摘要
针对现在新能源发电领域的双馈风力发电机高频谐振问题展开研究。首先,通过分析双馈风力发电机的两个变流器控制策略,可以得到变流器的阻抗模型。其次,分析各类补偿形式的电网的频率响应曲线,确定能够发生谐振的并联补偿电网拓扑结构。然后,通过绘制双馈感应发电机与并联补偿电网的阻抗Bode图,当两系统的幅值响应交点所对应的相位裕度在180°时,会发生谐振。最终,在PSCAD中搭建仿真模型进行验证,仿真结果验证了双馈风力发电机的高频谐振机理分析的合理性和有效性。
The high frequency resonance of doubly fed-back induction generator(DFIG) in the field of renewable power generation is studied.Firstly,by analyzing the control strategies of two converters,the impedance models of two converters can be obtained respectively.Secondly,by analyzing the frequency response curves of the grid in various compensation forms,the topology of the parallel compensation grid which can generate high frequency resonance is selected.Then,by plotting the impedance Bode diagram of DFIG and the parallel compensation grid,the frequency response margin can be obtained according to the intersection of two impedance magnitude curves when high frequency resonance occur.Finally,the simulation model can be built in PSCAD.The simulation results verifies that the analysis of high frequency resonance mechanism of DFIG has good rationality and effectiveness.
The high frequency resonance of doubly fed-back induction generator(DFIG) in the field of renewable power generation is studied.Firstly,by analyzing the control strategies of two converters,the impedance models of two converters can be obtained respectively.Secondly,by analyzing the frequency response curves of the grid in various compensation forms,the topology of the parallel compensation grid which can generate high frequency resonance is selected.Then,by plotting the impedance Bode diagram of DFIG and the parallel compensation grid,the frequency response margin can be obtained according to the intersection of two impedance magnitude curves when high frequency resonance occur.Finally,the simulation model can be built in PSCAD.The simulation results verifies that the analysis of high frequency resonance mechanism of DFIG has good rationality and effectiveness.
引文
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[3]王伟胜,张冲,何国庆,等.大规模风电场并网系统次同步振荡研究综述[J].电网技术,2017,41(4):1050-1060.WANG Weisheng,ZHANG Chong,HE Guoqing,et al.Overview of research on subsynchronous oscillations in large-scale wind farm integrated system[J].Power System Technology,2017,41(4):1050-1060.
[4]戎骏,胡海涛,邵洋,等.基于敏感度分析的海上风电场谐波谐振研究[J].电网技术,2016,40(8):2510-2517.RONG Jun,HU Haitao,SHAO Yang,et al.Harmonic resonance assessment for offshore wind farm based on sensitivity analysis[J].Power System Technology,2016,40(8):2510-2517.
[5]段庚勇,冯琳,李国杰.考虑集电网结构的海上风电场谐振研究[J].电力系统保护与控制,2016,44(22),1-11.DUAN Gengyong,FENG Lin,LI Guojie.Research on resonance of offshore wind farm considering electricity collection system[J].Power System Protection and Control,2016,44(22):1-11.
[6]唐振东,杨洪耕,马晓阳,等.偏远地区风电场的并网谐振现象分析[J].电网技术,2016,40(5):1415-1421.TANG Zhendong,YANG Honggeng,MA Xiaoyang,et al.Analysis on grid-connected resonance of wind farm in remote areas[J].Power System Technology,2016,40(5):1415-1421.
[7]VIETO I,SUN J.Impedance modeling of doublyfed induction generators[C].Power Electronics and Applications,2015:1-10.
[8]VIETO I,SUN J.Damping of subsynchronous resonance involving type-III wind turbines[C].Control Modeling Power Electronics,2015:1-8.
[9]VIETO I,SUN J.Small-signal impedance modelling of type-III wind turbine[C].Power Energy and Society General Meeting,2015:1-5.
[10]VIETO I,SUN J.Real-times imulation of subsynchronous resonancein type-III wind turbines[J].Control Modeling Power Electronics,2014:1-8.
[11]MIAO Zhixin.Impedance-model-based SSR analysis for type 3 wind generator and series-compensated network[J].IEEE Transition on Energy Convers,2012,27(4):984-991.
[12]P I YASINGHE L,MIAO Zhixin,KHAZAEI J,et al.Impedance model-based SSR analysis for TCSC compensated type-3 wind energy delivery systems[J].IEEE Transactions on Sustainable Energy,2015,6(1):179-187,2015.
[13]远坂俊昭.锁相环PLL电路设计与应用[M].北京:科学出版社,2006.
[14]FAN Lingling,MIAO Zhixin.Nyquist-stabilitycriterion-based SS Rexplanation for type-3 wind generators[J].IEEE Transition on Energy Conversion,2012,27(3):807-809.
[15]谢小荣,王路平,贺静波,等.电力系统次同步谐振/振荡的形态分析[J].电网技术,2017,41(4):1043-1049.XIE Xiaorong,WANG Luping,HE Jingbo,et al.Analysis of subsynchronous resonance/oscillation types in power systems[J].Power System Technology,2017,41(4):1043-1049.