双流制机车变压器绕组复用电抗器对直流母线电压稳定性的影响
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摘要
为减少双流制机车体积和重量,直流工作制式下牵引变压器二次侧绕组充当平波电抗器即为其中一项关键技术。二次侧绕组接线方式不同时,其等效电感值可能非线性,这将对直流母线电压稳定性造成重要影响。针对该问题,首先将变压器当作普通电感,建立起双流制机车直流供电模式下系统等效电路,并运用小信号分析法对牵引变压器复用平波电抗器时直流母线电压的稳定性进行了分析;然后在牵引变压器二次侧绕组正串与反串两种不同接线方式下,提出了小信号模型下对应电感值的计算方法,以此得到变压器复用平波电抗器时对直流母线电压稳定性的影响,整个分析求解过程对多流制或双流制机车的研发与应用具有很好的指导作用。
The use of secondary-side winding of a traction transformer as a wave smoothing reactor in DC system is a key technology to reduce the size and weight of a double electric locomotive. Different modes of the secondary-side winding connection may possibly result in a nonlinear equivalent inductance value, which will affect the stability of DC bus voltage. To solve this problem, the transformer is treated as an ordinary inductor at first, thus the equivalent circuit of a double electric locomotive system in DC power supply mode is established, and the stability of DC bus voltage when the traction transformer is reused as a wave smoothing reactor is analyzed using the small signal analysis method. Then,a calculation method for the inductance value of the small signal model is proposed in forward and reverse connection modes. In this way, the influence on the stability of DC bus voltage when the traction transformer is reused as a wave smoothing reactor can be analyzed. The whole analysis and solving process is of value to guiding the development and application of multi or double electric locomotives.
The use of secondary-side winding of a traction transformer as a wave smoothing reactor in DC system is a key technology to reduce the size and weight of a double electric locomotive. Different modes of the secondary-side winding connection may possibly result in a nonlinear equivalent inductance value, which will affect the stability of DC bus voltage. To solve this problem, the transformer is treated as an ordinary inductor at first, thus the equivalent circuit of a double electric locomotive system in DC power supply mode is established, and the stability of DC bus voltage when the traction transformer is reused as a wave smoothing reactor is analyzed using the small signal analysis method. Then,a calculation method for the inductance value of the small signal model is proposed in forward and reverse connection modes. In this way, the influence on the stability of DC bus voltage when the traction transformer is reused as a wave smoothing reactor can be analyzed. The whole analysis and solving process is of value to guiding the development and application of multi or double electric locomotives.
引文
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[3]许勇奇.双流制电力机车供电制式切换过程暂态特性及治理方法[D].长沙:湖南大学,2016.Xu Yongqi.The transient characteristics and solutions of double-system electric locomotives during the process of switching its supply systems[D].Changsha:Hunan University,2016(in Chinese)
[4]徐恺.双流制电力机车供电模式切换过程暂态特性研究[D].长沙:湖南大学,2014.Xu Kai.The research of the double electric locomotive’s transient characteristics during the switching different supply systems process[D].Changsha:Hunan University,2014(in Chinese).
[5]卢增艺,吴伟华,杨海军,等.高频大电流电抗器近场损耗分析[J].电源学报,2017,15(4):168-172.Lu Zengyi,Wu Weihua,Yang Haijun,et al.Near-field loss analysis of high frequency and high current choke[J].Journal of Power Supply,2017,15(4):168-172(in Chinese).
[6]杨守君,刘会岩.HX_D3型交流传动电力机车[J].电力机车与城轨车辆,2007,30(4):9-13,19.Yang Shoujun,Liu Huiyan.Type HXD3 AC drive electric locomotive[J].Electric Locomotives&Mass Transit Vehicles,2007,30(4):9-13,19(in Chinese).
[7]刘剑,黄小庆,曹一家,等.三相SVC在电气化铁路电能质量治理中的应用[J].电力系统及其自动化学报,2011,23(6):22-28.Liu Jian,Huang Xiaoqing,Cao Yijia,et al.Application of three-phase SVC in power quality man agement for electrified rail way[J].Proceedings of the CSU-EPSA,2011,23(6):2 2-28(in Chinese).
[8]许加柱,祁琪,李知宇,等.基于降阶电感矩阵法的多流制牵引主变压器直流滤波电感的计算[J].中国电机工程学报,2015,35(15):3964-3970.Xu Jiazhu,Qi Qi,Li Zhiyu,et al.Calculations of DC filter inductance used in multi-system traction main transformersbased on the reduced-order induc tance matrix method[J].Proceedings of the CSEE,2015,35(15):3964-3970(in Chinese)
[9]孙大南,刘志刚,林文立,等.地铁牵引变流器直流侧振荡抑制策略研究[J].铁道学报,2011,33(8):52-57.Sun Da’nan,Liu Zhigang,Lin Wenli,et al.Research on DC-Link oscillation suppression strategy in metro traction converter[J].Journal of the China Railway Society,2011,33(8):52-57(in Chinese).
[10]Chang Xiaoyong,Li Yongli,Li Xuan,et al.An active damping method based on a supercapacitor energy storage system to overcome the destabilizing effect of instantaneous constant power loads in DC microgrids[J].IEEE Transactions on Energy Conversion,2017,32(1):36-46.
[11]李晓松,吴素平,周正龙.直流制式下机车变压器用作电抗器的电磁特性分析及设计优化[J].湖南大学学报:自然科学版,2015,42(8):66-73.Li Xiaosong,Wu Suping,Zhou Zhenglong.Analysis of electromagnetic characteristics of a locomotive transformer as a filter and design optimization in DC system[J].Journal of Hunan University:Natural Science,2015,42(8):66-73(in Chinese)
[12]赵雷廷,刁利军,董侃,等.地铁牵引变流器-电机系统稳定性控制[J].电工技术学报,2013,28(6):101-107.Zhao Leiting,Diao Lijun,Dong Kan,et al.Stabilization control for metro traction converter-motor system[J].Transactions of China Electrotechnical Society,2013,28(6):101-107(in Chinese)