Abstract：In order to overcome the difficulties of narrow speed range and poor load voltage regulation,a novel parallel-connected open-winding topology of permanent magnet synchronous generator system is proposed.Due to the inherent zero-sequence current and harmonics problems for the novel topology,the operation principle of the new system and the mechanism of generating the zero-sequence current are analyzed in detail.Then,an improved current control method is proposed by compensating the offset voltage of the rectifier connected to the open-end windings to suppress the output ripple of the proportional-integral (PI) regulator.In this way,the current harmonics of the proposed generation system can be reduced.Finally,the simulation and experiment results verify that the proposed current control method has better performance comparing to traditional approaches.
[1] 王凤翔.永磁电机在风力发电系统中的应用及其发展趋向[J].电工技术学报,2012,27(3):12-24. Wang Fengxiang.Application and development tendency of PM machines in wind power generation system[J].Transactions of China Electrotechnical Society,2012,27(3):12-24. [2] 李华湘,胡勇峰.永磁发电机载电动汽车上的应用[J].大功率变流技术,2014(2):31-34. Li Huaxiang,Hu Yongfeng.Application of permanent magnet generator for electric vehicle[J].High Power Converter Technology,2014(2):31-34. [3] 夏长亮.永磁风力发电系统及其功率变换技术[J].电工技术学报,2012,27(11):1-13. Xiang Changliang.Wind energy conversion system based on PMSG and its power converter technology[J].Transactions of China Electrotechnical Society,2012,27(11):1-13. [4] Jin Yunyu,Dan Sun,Bin Lin,et al.Direct torque control combined with MTPA concept for open winding IPMSM[C]//15th International Conference on Electrical Machines and Systems,Sapporo,Japan,2012:1-6. [5] Ewanchuk J,Salmon J,Chapelsky C.A method for supply voltage boosting in an open-ended induction machine using a dual inverter system with a floating capacitor bridge[J].IEEE Transactions on Power Electronics,2013,3(28):1348-1357. [6] Gerrits T,Wijnands C G C,Paulides J J H.Dual Inverter Source Inverter Topology Extending Machine Operating Range[C]//IEEE Energy Conversion Congress and Exposition,Raleigh,America,2012:2840-2846. [7] 年珩,周义杰,李嘉文.基于开绕组结构的永磁风力发电机控制策略[J].电机与控制学报,2013,17(4):79-185. Nian Heng,Zhou Yijie,Li Jiawen.Control strategy of permanent magnet wind generator based on open winding configuration[J].Electric Machines And Control,2013,17(4):79-185. [8] Mathew J,Rajeevan P P, Mathew K,et al.A multilevel inverter scheme with dodecaganal voltage space vectors based on flying capacitor topology for induction motor drives[J].IEEE Transactions on Power Electronics,2013,28(1):516-525. [9] Srinivas S,Sekhar K R.Theoretical and experimental analysis for current in a dual inverter fed open-end winding induction motor drive with reduced switching PWM[J].IEEE Transactions on Industry Applications,2013,60(10):4318-4328. [10]魏佳丹,周波,韩楚,等.一种绕组开路型永磁电机起动/发电系统[J].中国电机工程学报,2011,31(36):86-94. Wei Jiadan,Zhou Bo,Han Chu,et al.A novel open-winding permanent magnetic starter-generator[J].Proceedings of the CSEE,2011,31(36):86-94. [11]Somani A,Gupta R K,Mohapatra K K,et al.Circulating current in open-end windign PWM AC drives[C]//36th Annual Conference on IEEE Industrial Electronics Society,Glendale,America,2010:798-804. [12]Srinivas S,Kalaiselvi J.Pulse width modulation schemes enabling single DC power source driven dual two-level voltage source inverter with single voltage source inverter switching[J].IET Power Electronics,2013,5(7):1181-1191. [13]Somani A,Gupta R K,Mohapatra K K,et al.On the causes of circuiting currents in PWM drives with open-end winding AC machines[J].IEEE Transactions on Industrial Electronics,2013,60(9):3670-3678. [14]Erdman J M,Kerkman R J,Schlegel D W,et al.Effect of PWM inverters on AC motor bearing currents and shaft voltage[J].IEEE Transactions on Industry Applications,1996,32(2):234-239. [15]Willwerth A,Roman M.Electrical bearing damage-a lurking problem in inverter-driven traction motors[C]//IEEE Transportation Electrification Conference and Expo,Detroit,MI,2013:1-4. [16]Senicar F,Junge C,Gruber S,et al.Zero sequence current elimination for dual-inverter fed machines with open-end windings[C]//36th Annual Conference on IEEE Industrial Electronics Society,Glendale,AZ,2010:853-856. [17]Somasehar V T,Gopakumar K,Baiju M R.Dual two-level inverter scheme for an open-end winding induction motor drive with a single DC power supply and improved DC bus utilization[J].IEE Proceedings-Electric Power Applications,2004,151(2):230-238. [18]Somasekhar V T,Srinivas S,Reddy B P,et al.Pulse width-modulated switching strategy for dynamic balancing of zero-sequence current for a dual-inverter fed open-end winding induction motor drive[J].IET Electric Power Applications,2007,1(4):591-600. [19]Wang Y,Panda D,Lipo T A,et al.Open-winding power conversion systems fed by half-controlled converters[J].IEEE Transactions on Power Electronics,2013,28(5):2427-2436. [20]李涛,李晓峰,乔鸣忠.SPWM与SVPWM的宏观对等性研究[J].中国电机工程学报,2010,30(增1):178-184. Li Tao,Li Xiaofeng,Qiao Mingzhong.Research on the micro-equivalence between SPWM and SVPWM[J].Proceedings of the CSEE,2010,30(S1):178-184. [21]文小玲,尹项根,张哲.三相逆变器统一空间矢量PWM实现方法[J].电工技术学报,2009,24(10):87-93. Wen Xiaoling,Yin Xianggen,Zhang Zhe.Unified space vector PWM implementation method for three-phase inverters[J].Transactions of China Electrotechnical Society,2009,24(10):87-93.
2016, Vol. 31 
