Abstract：DC-link voltages balancing is very important for cascaded H-bridge rectifier (CHBR). A new control method for voltages balancing is proposed in this paper. The relationship between the modulation index increment and the output voltage error is deduced. Therefore the modulation indexes of the cells are rearranged according to the measured dc voltages and the DC voltages are regulated to be the same value. The implement method for the proposed strategy is discussed in detail and the final method is derived. Simulations and experiments were carried out with the presented method. All of them approve that the proposed method is effective for such cascaded topology. The good performance is achieved when the CHBR is operating on the different conditions.
陶兴华, 李永东, 孙敏. 一种H桥级联型PWM整流器的直流母线电压平衡控制新方法[J]. 电工技术学报, 2011, 26(8): 85-90.
Tao Xinghua, Li Yongdong, Sun Min. A Novel DC-Link Voltages Balancing Control Method for Cascaded H-Bridge Rectifier. Transactions of China Electrotechnical Society, 2011, 26(8): 85-90.
[1] 李永东, 肖曦, 高跃. 大容量多电平变换器-原理控制应用[M]. 北京: 科学出版社, 2005. [2] Rodriguez J, Franquelo L G, Kouro S, et al. Multilevel Converters: An Enabling Technology for High-Power Applications[J]. Proceedings of the IEEE, 2009, 97(11): 1786-1817. [3] Jih Sheng L, Fang Z P. Multilevel converters-a new breed of power converters[J]. IEEE Transactions on Industry Applications, 1996, 32(3): 509-517. [4] 李建林, 赵栋利. 载波相移SPWM级联H型变流器及其在有源电力滤波器中的应用[J]. 中国电机工程学报, 2006, 26(10): 109-113. [5] 饶建业. 带储能单元的混合型多电平逆变器及其控制算法的研究[D]. 北京: 清华大学, 2009. [6] Corzine K, Familiant Y. A new cascaded multilevel H-bridge drive[J]. IEEE Transactions on Power Electronics, 2002, 17(1): 125-131. [7] Dell’Aquila A, Liserre M, Monopoli V G, et al. Overview of PI-Based Solutions for the Control of DC Buses of a Single-Phase H-Bridge Multilevel Active Rectifier[J]. IEEE Transactions on Industry Applications, 2008, 44(3): 857-866. [8] Dell’Aquila A, Liserre M, Monopoli V G, et al. Passivity-based control of a single-phase H-bridge multilevel active rectifier[C]. Proceedings of the 2002 28th Annual of the IEEE Industrial Electronics Society, 2002: 3117-3122. [9] Dell’Aquila A, Liserre M, Monopoli V G, et al. An energy-based control for an n-H-bridges multilevel active rectifier[J]. IEEE Transactions on Industrial Electronics, 2005, 52(3): 670-678. [10] Iman-Eini H, Schanen J L, Farhangi S, et al. A Modular Strategy for Control and Voltage Balancing of Cascaded H-Bridge Rectifiers[J]. IEEE Transactions on Power Electronics, 2008, 23(5): 2428-2442. [11] Lin B R, Lu H H. New multilevel rectifier based on series connection of H-bridge cell[J]. Electric Power Applications, IEE Proceedings-, 2000, 147(4): 304- 312. [12] Sato Y, Ishizuka T, Nezu K, et al. A new control strategy for voltage-type PWM rectifiers to realize zero steady-state control error in input current[J]. IEEE Transactions on Industry Applications, 1998, 34(3): 480-486.
2011, Vol. 26 
