|
|
|
| Three-Level Pulse Width Modulation Strategy Based on Zero-Sequence Voltage Injection and Modulation-Waves Decomposition |
| Xie Luyao1, Jin Xinmin2, Wu Xuezhi2, Yin Jingyuan2, Tong Yibin2 |
1. Zhejiang University of Technology Hangzhou 310023 China;
2. Beijing Jiaotong University Beijing 100044 China |
|
|
|
|
Abstract Contrastive analysis of zero-sequence voltage injected SPWM and SVPWM is made in this paper, and the relationship between the two modulation strategies in duty ratio and vector sequences is explained with line voltage based space vector diagram and switching period window shift diagram. On the basis of inherent consistency between the two modulation strategies, a three-level pulse width modulation scheme based on zero-sequence voltage injection and modulation-waves decomposition is discussed in this paper. Complex space vector resolution, which is necessary in SVPWM, is completely eliminated in this PWM scheme. The control objectives such as minimum switching loss, optimal output voltage quality or neutral point balancing control can be alternatively achieved and smoothly transformed into each other. Therefore, the proposed PWM scheme is extremely flexible and easy to realize. The program difficulty and computation time can be greatly reduced.
|
|
Received: 13 April 2012
Published: 05 November 2014
|
|
|
|
|
|
[1] 李俊峰、蔡丰波、唐文倩, 等. 风光无限2011中国风电发展报告[M]. 北京: 中国环境科学出版社, 2011.
[2] Faulstich A, Stinke J K, Wittwer F. Medium voltage converter for permanent magnet wind power generators up to 5MW[C]. European Conference on Power Electronics and Applications, 2005.
[3] Nabae A, Takahahii I, Akagi H. A new neutral-point clamped PWM inverter[J]. IEEE Transactions on Industry Application, 1981, 17(5): 518-523.
[4] Carrara G, Gardella S, Marchesoni M, et al. A new multilevel PWM method: A theoretical analysis[J]. IEEE Transactions Power Electron, 1992, 7(3): 497-505.
[5] McGrath B P, Holmes D G, Lipo T A. Optimized space vector switching sequences for multilevel inverters[J]. IEEE Transactions on Power Electronics, 2003, 18(6): 1293-1301.
[6] Kanchan R S, Baiju M R, Mohapatra K K, et al. Space vector PWM signal generation for multilevel inverters using only the sampled amplitudes of reference phase voltages[J]. IEE Proceedings Electric Power Applications, 2005, 152(2): 297-309.
[7] Ogasawara S, Akagi H. Analysis of variation of neutral point potential in neutral-point-clamped voltage source PWM inverters[C]. IEEE Industry Applications Society Annual Meeting, 1993: 965-970.
[8] 宋强, 刘文华, 等. 基于零序电压注入的三电平NPC逆变器中点电位平衡控制方法[J]. 中国电机工程学报, 2004, 24(5): 57-62. Song Qiang, Liu Wenhua, et al. A neutral-point potential balancing algorithm for three-level NPC inverters by using analytically injected zero-sequence voltage[J]. Proceedings of the CSEE, 2004, 24(5): 57-62.
[9] 孟永庆, 沈传文, 刘正, 等. 基于零序电压注入的三电平中点箝位整流器中点电位控制方法的研究[J]. 中国电机工程学报, 2007, 27(10): 92-97. Meng Yongqing, Shen Chuanwen, Liu Zheng, et al. Study on neutral-point potential control method for three-level NPC rectifiers by injecting zero-sequence voltage[J]. Proceedings of the CSEE, 2007, 27(10): 92-97.
[10] Celanovic N, Boroyevich D. A fast space vector modulation algorithm for multilevel three-phase con- verters[J]. IEEE Transactions on Industry Application. 2001, 37(2): 637-641.
[11] Celanovic N, Borojevic D. A comprehensive study of neutral point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters [J]. IEEE Transactions Power Electronics, 2000, 15(2): 242-249.
[12] Yamanaka K, Hava A M, Kirino H, et al. A novel neutral point potential stabilization technique using the information of output current polarities and voltage vector[J]. IEEE Transactions on Industry Applications, 2002, 38(6): 1572-2080.
[13] Busquets-Monge S, Bordonau J, Boroyevich D, et al. The nearest three virtual space vector PWM: a modulation for the comprehensive neutral-point balancing in the three-level NPC inverter[J]. IEEE Power Electronics Letters, 2004, 2(1): 11-15. |
|
|
|
2014, Vol. 29 
