Abstract：In the motor closed-loop control system, the inverter-motor load can be treated as a constant power load due to the fast follow-up of the torque. The negative impedance characteristic of the constant power load(CPL) causes the traction drive system to have less damping, which causes the DC side voltage and current to oscillate. In this paper, the cause of DC side oscillation of the traction drive system induced by constant power load is expounded by analyzing the traction converter model, the mathematical model of the built-in interior permanent magnet synchronous motor(IPMSM) and the mathematical model of the control system. Then, through the small signal analysis. The admittance model of the inverter-built- in permanent magnet synchronous motor system under the control of Maximum Torque Per Ampere(MTPA) is deduced. On the basis of the admittance model in this paper, the influence of LC parameters, inductance parameters, stator resistance parameters and power on the stability of the system is analyzed by the stability analysis method in the frequency domain, and also, the influence of the parameters on the stability and the process of change of motor’s stability was found. Based on the theoretical analysis, a kind of active damping compensation method is realized. Simulation and experiment prove that the compensation method can effectively increase the system damping and improve the stability of the system.
钟志宏, 方晓春, 林飞, 杨中平. MTPA控制下逆变器-IPMSM系统直流侧电压稳定性研究[J]. 电工技术学报, 2017, 32(21): 34-43.
Zhong Zhihong, Fang Xiaochun, Lin Fei, Yang Zhongping. DC Voltage Stability Studies with IPMSM System under the Control of MTPA. Transactions of China Electrotechnical Society, 2017, 32(21): 34-43.
[1] Lee W J, Sul S K. DC-link voltage stabilization for reduced DC-link capacitor inverter [J]. IEEE Transactions on Industrial Applications, 2014, 50(1): 404-414. [2] 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 Danan, Liu Zhigang, Lin Liwen, 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. [3] Maheshwari R K, Munk-Nielsen S, Lu Kaiyuan. An active damping technique for small DC-link capacitor based drive system[J]. IEEE Transactions on Industrial Informatics, 2013, 9(2): 848-858. [4] Liu Xinyun, Fournier N, Forsyth A J. Active stabilisation of an HVDC distribution system with multiple constant power loads[C]//IEEE Vehicle Power and Propulsion Conference, Harbin, China, 2008, 12: 1-6. [5] Mohamed Y A R I, Radwan A A A, Lee T K. Decoupled reference-voltage-based active DC-link stabilization for PMSM drives with tight-speed regulation[J]. IEEE Transactions on Industrial Electronics, 2012, 59(12): 4523-4536. [6] 林文立, 刘志刚, 孙大南, 等. 地铁牵引系统的稳定性提升控制[J]. 电机与控制学报, 2012, 16(2): 56-61. Lin Wenli, Liu Zhigang, Sun Da’nan, et al. Stability improvement control for metro traction drive system[J]. Electric Machines and Control, 2012, 16(2): 56-61. [7] Magne P, Marx D, Nahid-Mobarakeh B, et al. Large-signal stabilization of a DC-Link supplying a constant power load using a virtual capacitor: impact on the domain of attraction[J]. IEEE Transactions on Industrial Applications, 2012, 48(3): 878-887. [8] Liu Xinyun, Forsyth A J, Cross A M. Negative input-resistance compensator for a constant power load[J]. IEEE Transactions on Industrial Electronics, 2007, 54(6): 3188-3196. [9] Liutanakul P, Awan A B, Pierfederici S, et al. Linear stabilization of a dc bus supplying a constant power load: a general design approach[J]. IEEE Transactions on Power Electronics, 2010, 25(2): 475-488. [10] 赵冬. 考虑直流环节振荡的城轨永磁同步电机控制系统研究[D]. 北京：北京交通大学, 2015. [11] Mosskull H, Galic J, Wahlberg B. Stabilization of induction motor drives with poorly damped input filters [J]. IEEE Transactions on Industrial Electronics, 2007, 54(5): 2724-2734. [12] Rahimi A M, Williamson G A, Emadi A. Loop-cancellation technique: a novel nonlinear feedback to overcome the destabilizing effect of constant-power loads[J]. IEEE Transactions on Vehicular Technology, 2010, 59(2): 650-661. [13] Jenum P A, Holberg-Petersen M, Melby K K, et al. Stabilization of an induction motor drive-part I: modeling and analysis[M]. Center for Far Eastern Studies University of Toyama, 2008. [14] Mosskull H. Robust control of an induction motor drive[M]. Sweden: Control Engineering, 2006. [15] 岳小龙, 卓放, 张政华, 等. 电力电子系统阻抗测量的分段二叉树法[J]. 电工技术学报, 2015, 30(24): 76-83. Yue Xiaolong, Zhuo Fang, Zhang Zhenghua, et al. Segmented binary tree method for power electronic system impedance measurement[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 76-83. [16] Feng Xiaogang, Liu Jinjun, Lee F C. Impedance specifications for stable DC distributed power systems[J]. IEEE Transactions on Power Electronics, 2002, 17(2): 157-162. [17] 支娜, 张辉, 肖曦. 提高直流微电网动态特性的改进下垂控制策略研究[J]. 电工技术学报, 2016, 31(3): 31-39. Zhi Na, Zhang Hui, Xiao Xi. Improve dynamic behavior of micro-grid to improve sagging control strategy[J]. Transactions of China Electrotechnical Society, 2016, 31(3): 31-39. [18] 方晓春, 钟志宏, 杨中平, 等. 阻抗不匹配引起的逆变器-IPMSM系统直流侧振荡抑制方法对比[J]. 电工技术学报, 2017, 32(15): 50-58. Fang Xiaochun, Zhong Zhihong, Yang Zhongping, et al. Comparative research on DC side oscillation suppression methods for inverter-IPMSM system caused by impedance mismatch[J]. Transactions of China Electrotechnical Society, 2017, 32(15): 50-58. [19] 近藤稔 (日). 永磁同步电动机在铁道机车动车上的应用[J]. 变流技术与电力牵引, 2003(1): 1-5. Jin Tengren. Application of permanent magnet synchronous motors to railway locomotive on the train[J]. Converter Technology & Electric Traction, 2003(1): 1-5. [20] 方晓春. 城轨列车永磁同步牵引电机控制与逆变器直流侧振荡抑制研究[D]. 北京: 北京交通大学, 2016.
2017, Vol. 32 
