牵引供电网-多台机车耦合系统的低频振荡分析与抑制
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摘要
目前我国电气化铁路交直交机车与牵引网构成的车网耦合系统时常发生低频振荡(LFO),严重威胁铁路的安全稳定运行。为了研究低频振荡产生机理,该文首先基于阻抗比判据和Bode图对车网耦合系统进行稳定性理论分析,给出影响稳定性的主要因素;然后基于Matlab/Simulink搭建车网耦合仿真模型并进行联合仿真,仿真结果再现低频振荡现象,并验证理论分析的正确性;最后根据阻抗比判据和Bode图的稳定性理论分析结果,给出基于机车网侧变流器控制参数修正的低频振荡抑制措施,并通过计算机仿真和硬件在环实时仿真证明了该抑制措施的正确性与有效性。
Recently, the low-frequency oscillation(LFO) phenomenon of China railway electric multiple AC-DC-AC locomotives-traction network coupling system has occurred frequently, which seriously affects the safety and stabilization of railway system. Firstly, in order to describe the LFO mechanism, the stability of multiple locomotives-traction network coupling system is analyzed theoretically in this paper, by utilizing the impedance ratio criterion and bode diagram. Sequentially,the main influential factors of the coupling system are presented. Then, the multiple locomotives-traction network coupling system is modeling and the joint simulation is carried out on Matlab/Simulink platform. The simulation results reappear the LFO phenomenon, which verifies correctness of the theoretical analysis. Finally, according to the stability analysis results of impedance ratio criterion and Bode diagram, a LFO suppression solution with control parameters modification of the locomotive rectifier is shown. The adopted scheme is verified in computer simulations and hardware-in-the-loop(HIL) experimental tests, the simulation and experimental results verify the correctness and effectiveness of the adopted LFO suppression scheme.
Recently, the low-frequency oscillation(LFO) phenomenon of China railway electric multiple AC-DC-AC locomotives-traction network coupling system has occurred frequently, which seriously affects the safety and stabilization of railway system. Firstly, in order to describe the LFO mechanism, the stability of multiple locomotives-traction network coupling system is analyzed theoretically in this paper, by utilizing the impedance ratio criterion and bode diagram. Sequentially,the main influential factors of the coupling system are presented. Then, the multiple locomotives-traction network coupling system is modeling and the joint simulation is carried out on Matlab/Simulink platform. The simulation results reappear the LFO phenomenon, which verifies correctness of the theoretical analysis. Finally, according to the stability analysis results of impedance ratio criterion and Bode diagram, a LFO suppression solution with control parameters modification of the locomotive rectifier is shown. The adopted scheme is verified in computer simulations and hardware-in-the-loop(HIL) experimental tests, the simulation and experimental results verify the correctness and effectiveness of the adopted LFO suppression scheme.
引文
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[15]向川.基于模型预测控制的车网电气量低频振荡抑制策略研究[D].成都:西南交通大学,2017.
[2]上海南翔开闭所.CRH1067接触网压电压电流测试报告[R].北京:中国铁道科学研究院,2010.
[3]Liao Yicheng,Liu Zhigang,Zhang Guinan,et al Vehicle-grid system modeling and stability analysis with forbidden region based criterion[J].IEEETransactions on Power Electronics,2017,32(5):3499-3512.
[4]Liu Zhigang,Zhang Guinan,Liao Yicheng.Stability research of high-speed railway EMUs and traction network cascade system considering impedance matching[J].IEEE Transactions on Industry Applications,2016,52(5):4315-4326.
[5]张润泽,林飞,杨中平,等.基于SHE-PWM的车网耦合谐振主动抑制策略研究[J].电工技术学报,2018,33(增刊1):129-138.Zhang Runze,Lin Fei,Yang Zhongping,et al.Active resonance suppression strategy for grid-train coupling resonance based on SHE-PWM[J].Transactions of China Electrotechnical Society,201833(S1):129-138.
[6]Roman Bartelt,Martin Oettmeier,Carsten Heising,et al.Improvement of low-frequency system stability in16.7Hz railway-power grids by multivariable lineconverter control in a multiple traction-vehicle scenario[J].Electrical Systems for Aircraft,Railway and Ship Propulsion(ESARS),2010,23(5):1-6.
[7]Wang Hui,Wu Mingli,Sun Juanjuan.Analysis of low-frequency oscillation in electronic railway based on small-signal modeling of vehicle-grid system in dq frame[J].IEEE Transactions on Power Electronics2015,30(9):5318-5330.
[8]Hu H T,Tao H D,Blaabjerg F,et al.Train-network interactions and stability evaluation in high-speed railways-part I:phenomena and modeling[J].IEEETransactions on Power Electronics,2018,33(6):4627-4642.
[9]刘诗慧,林飞,杨中平,等.抑制电气化铁路低频振荡的四象限变流器控制方法[J].电工技术学报,2016,31(增刊2):76-83.Liu Shihui,Lin Fei,Yang Zhongping,et al.Control method of four quadrant converter to restrain low frequency oscillation of electrified railway[J].Transactions of China Electrotechnical Society,2016,31(S2):76-83.
[10]Danielsen S,Fosso O B,Toftevaag T.Use of participation factors and parameter sensitivities in study and improvement of low-frequency stability between electrical rail vehicle and power supply[C]//13th European Conference on Power Electronics and Applications,Barcelona,2009:1-10.
[11]王晖,吴命利.电气化铁路低频振荡研究综述[J].电工技术学报,2015,30(17):70-78.Wang Hui,Wu Mingli.Review of low-frequency oscillation in electric railways[J].Transactions of China Electrotechnical Society,2015,30(17):70-78.
[12]吴命利.电气化铁道牵引网的统一链式电路模型[J].中国电机工程学报,2010,30(28):52-58.Wu Mingli.Uniform chain circuit model for traction networks of electric railways[J].Proceedings of the CSEE,2010,30(28):52-58.
[13]宋文胜,冯晓云,谢望玉.单相三电平整流器d-q坐标系下的控制与SVPWM方法[J].电机与控制学报,2012,16(4):56-63.Song Wensheng,Feng Xiaoyun,Xie Wangyu.Space vector pulse width modulation and control technique for single phase three level rectifier in d-q coordinate system[J].Electric Machines and Control,2012,16(4):56-63.
[14]张颖超,赵争鸣,袁立强,等.三电平PWM整流器直接功率控制[J].电工技术学报,2008,23(5):62-68.Zhang Yingchao,Zhao Zhengming,Yuan Liqiang,et al.Direct power control for three-level PWMrectifier[J].Transactions of China Electrotechnical Society,2008,23(5):62-68.
[15]向川.基于模型预测控制的车网电气量低频振荡抑制策略研究[D].成都:西南交通大学,2017.