组合式虚拟同相柔性供电装置的直接功率控制
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摘要
虚拟同相柔性供电装置能够避免列车通过电分相时引发的速度损失以及因动态过程而产生的电压和电流冲击等暂态过程,因此具有重要的工程应用价值。以国家十三五重点研发计划—轨道交通高能效牵引供电与传动关键技术项目拟采用的组合式虚拟同相柔性供电装置为研究对象,分析该组合装置供电的中性段与牵引供电臂进行功率柔性切换的基本原理,建立数学模型,基于传统直接功率控制算法,提出一种适用于该组合装置的直接功率控制算法。该算法能够实现对组合式虚拟同相柔性供电装置的功率控制,实现负载功率在中性段与牵引供电臂之间的柔性切换,避免车网分离时拉弧现象的产生。Matlab/Simulink仿真结果验证了此控制算法的有效性和可行性。
Virtual co-phase traction power supply system has important engineering application value because it can eliminate voltage/current shock and locomotive speed loss when it crosses neutral section. Taking the key national project of the 13 th Five-Year Plan-Combined Virtual In-phase Flexible Power Supply Equipment to be adopted in the Key Technology Project of High-efficiency Traction Power Supply and Transmission for Rail Transit as research object, the working principle of composite set of devices is analyzed.Based on direct power control theory, a direct power control algorithm for the composite set is proposed. The power control of the composite set can be achieved with this algorithm, and generation of electric arcs is avoided because flexible switching of locomotive power is realized between neutral section and traction power supply ratio. Matlab/Simlink simulation results verify correctness and effectiveness of this control mode.
Virtual co-phase traction power supply system has important engineering application value because it can eliminate voltage/current shock and locomotive speed loss when it crosses neutral section. Taking the key national project of the 13 th Five-Year Plan-Combined Virtual In-phase Flexible Power Supply Equipment to be adopted in the Key Technology Project of High-efficiency Traction Power Supply and Transmission for Rail Transit as research object, the working principle of composite set of devices is analyzed.Based on direct power control theory, a direct power control algorithm for the composite set is proposed. The power control of the composite set can be achieved with this algorithm, and generation of electric arcs is avoided because flexible switching of locomotive power is realized between neutral section and traction power supply ratio. Matlab/Simlink simulation results verify correctness and effectiveness of this control mode.
引文
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[2]田旭,姜齐荣,魏应冬.电气化铁路无断电过分相方案研究[J].电力系统保护与控制,2012,40(21):14-18.Tian Xu,Jiang Qirong,Wei Yingdong.Research on novel uninterruptible phase-separation passing sheme in electrified railways[J].Power System Protection and Control,2012,40(21):14-18(in Chinese).
[3]李群湛.论新一代牵引供电系统及其关键技术[J].西南交通大学学报,2014,49(4):559-568.Li Qunzhan.On new generation traction power supply system and its key technologies for electrification railway[J].Journal of Southwest Jiaotong University,2014,49(4):559-568(in Chinese).
[4]Pee-Chin T,Poh Chiang L,Holmes D G.A robust multilevel hybrid compensation system for 25-kV electrified railway applications[J].IEEE Transactions on Power Electronics,2004,19(4):1043-1052.
[5]宫衍圣.电力机车过关节式电分相过电压研究[J].铁道学报,2008,30(4):103-107.Gong Yansheng.Research of over-voltages of electric locomotive passing the articulated phase insulator[J].Journal of the China Railway Society,2008,30(4):103-107(in Chinese).
[6]冉旺,李雄,刘冰,等.地面自动过分相中开关切换的瞬态过程研究[J].电工技术学报,2011,26(11):150-154.Ran Wang,Li Xiong,Liu Bing,et al.Research on transient process of ground’s auto-passing neutral section at switching time[J].Transaction of China Electrotechnical Society,2011,26(11):150-154(in Chinese).
[7]Chen M,Li Q,Roberts C,et al.Modelling and performance analysis of advanced combined co-phase traction power supply system in electrified railway[J].IET Generation,Transmission&Distribution,2016,10(4):906-916.
[8]谢杰,张秀峰,孙吉,等.基于Y,d11接线变压器的同相供电技术方案[J].电网技术,2010,34(6):149-153.Xie Jie,Zhang Xiufeng,Sun Ji,et al.Co-phase power supply technology based on power transformer with Y,d11 winding connection[J].Power System Technology,2010,34(6):149-153(in Chinese).
[9]黄小红,李群湛.基于模块化多电平换流器和组合式变压器的高速铁路同相牵引供电系统[J].高电压技术,2016,42(1):97-104.Huang Xiaohong,Li Qunzhan.Co-phase traction power supply system of high speed railway based on modular multilevel converter and combined connection transformer[J].High Voltage Technology,2016,42(1):97-104(in Chinese).
[10]Shu Z,Xie S,Lu K,et al.Digital detection,control,and distribution system for co-phase traction power supply application[J].IEEETransactions on Industrial Electronics,2013,60(5):1831-1839.
[11]He X,Shu Z,Peng X,et al.Advanced cophase traction power supply system based on three-phase to single-phase converter[J].IEEETransactions on Power Electronics,2014,29(10):5323-5333.
[12]Xiong C L,Ma J P,Wu X J,et al.Virtual co-phase traction power supply system adopting the cascaded H-bridge multilevel converter[J].Electronics Letters,2016,52(10):865-866.
[13]熊成林,冯晓云,马俊鹏.采用级联H桥多电平变流器的地面过电分相系统[J].中国铁道科学,2016,37(1):93-99.Xiong Chenglin,Feng Xiaoyun,Ma Junpeng.A ground’s auto-passing neutral section system adopting the cascade H-bridge multilevel converter[J].Power System Protection and Control,2016,37(1):93-99(in Chinese).
[14]Tao Y,Wu Q,Wang L,et al.Voltage sensorless predictive direct power control of three-phase PWM converters[J].IET Power Electronics,2016,9(5):1009-1018.
[15]郭小强,张学,卢志刚,等.不平衡电网电压下光伏并网逆变器功率/电流质量协调控制策略[J].中国电机工程学报,2014,34(3):346-353.Guo Xiaoqiang,Zhang Xue,Lu Zhigang,et al.Coordinate control of power and current quality for grid-connected PV inverters under unbalanced grid voltage[J].Proceedings of the CSEE,2014,34(3):346-353(in Chinese).
[16]Li X,Fang J,Lin P,et al.Active magnetic decoupling for improving the performance of integrated LCL-filters in grid-connected converters[J].IEEE Transactions on Industrial Electronics,2018,65(2):1367-1376.
[17]Roslan N F,Suul J A,Rocabert J,et al.A comparative study of methods for estimating virtual flux at the point of common coupling in grid-connected voltage source converters with LCL filter[J].IEEETransactions on Industry Applications,2017,53(6):5795-5809.
[18]刘斌,王蒙蒙,黄凯伦,等.引入网侧电感电流修正量的LCL逆变控制器及其状态估计[J].电网技术,2016,40(2):556-562.Liu Bin,Wang Mengmeng,Huang Kailun,et al.LCL inverter controller with grid-side inductor current correction and its state estimation[J].Power System Technology,2016,40(2):556-562(in Chinese).