Abstract Compared with the single-module LCC converter, the multi-module LCC converters with input parallel output series (IPOS) have the advantages of modularity, small component electrical stress, small output ripple, high output voltage and high power. However, the deviation of the resonant tank parameters between the modules will cause the unbalanced module output voltage. In this paper, for the LCC resonant converter with the capacitive filter, the fundamental components of the voltage and current of the converter were calculated by the fundamental wave approximation. The state equation of the LCC converter was established adopting the generalized state-space averaging method. Then, the large-signal model of the single-module LCC converter was derived. On this basis, the large-signal model of the two-module LCC converter with input parallel and output series was derived. Through the large-signal model, the influence of the deviation of the resonant tank parameters on the output voltage balance between modules was analyzed. Finally, a prototype of the two-module LCC converter is built, which shows that the proposed large-signal model of multi-module LCC converter has good accuracy. The proposed model can provide a basis for the tolerance analysis of resonant tank parameters.
Wu Liang,Sun Xiaowei,Zhao Jun等. Analysis of Output Voltage Imbalance for Cascaded Multi-Module LCC Converters Based on Large-Signal Model[J]. Transactions of China Electrotechnical Society, 2020, 35(24): 5142-5151.
[1] 夏冰, 阮新波, 陈武. 高压大功率场合LCC谐振变换器的分析与设计[J]. 电工技术学报, 2009, 24(5): 60-66. Xia Bing, Ruan Xinbo, Chen Wu.Analysis and design of LCC resonant converter for high voltage and high power applications[J]. Transactions of China Electrotechnical Society, 2009, 24(5): 60-66. [2] Sung-Roc J, Yu Chanhun, Hong-Je R.Simplified design of a solid state pulsed power modulator based on power cell structure[J]. IEEE Transactions on Industrial Electronics, 2018, 65(3): 2112-2121. [3] 刘国梁, 李新, 伍梁, 等. 宽范围输入输出电压LCC谐振变换器的分析设计[J]. 浙江大学学报(工学版), 2018, 52(9): 1762-1770. Liu Guoliang, Li Xin, Wu Liang, et al.Analysis and design-optimization of LCC resonant converter oper- ating under wide range input and output voltage[J]. Journal of Zhejiang University (Engineering Science), 2018, 52(9): 1762-1770. [4] Soeiro T B, Mühlethaler J, Linnér J, et al.Automated design of a high-power high-frequency LCC resonant converter for electrostatic precipitators[J]. IEEE Transactions on Industrial Electronics, 2013, 60(11): 4805-4819. [5] Jang S, Seo J, Ryoo H.Development of 50kV, 100kW three-phase resonant converter for 95GHz gyrotron[J]. IEEE Transactions on Industrial Electronics, 2016, 63(11): 6674-6683. [6] Guo Tang, Zhang Chi, Chang Lei, et al.Large-signal modeling of LCC resonant converter operating in discontinuous current mode applied to electrostatic precipitators[C]//2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition, Long Beach, CA, 2013: 2629-2635. [7] 张治国, 谢运祥, 袁兆梅. LCC谐振变换器的电路特性分析[J]. 电工技术学报, 2013, 28(4): 50-57. Zhang Zhiguo, Xie Yunxiang, Yuan Zhaomei.Analysis of circuit characteristics of LCC resonant con- verter[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 50-57. [8] 高铁峰, 张森, 赵剑锋, 等. LCC谐振变换器非对称移相控制及效率优化方法[J]. 电工技术学报, 2017, 32(8): 208-219. Gao Tiefeng, Zhang Sen, Zhao Jianfeng, et al.Asymmetrical phase shift control and efficiency optimization strategy for LCC resonant converter[J]. Transactions of China Electrotechnical Society, 2017, 32(8): 208-219. [9] 王德玉, 段元超, 高鹤, 等. LCC谐振变换器电流输出特性研究与软开关实现[J]. 电工技术学报, 2018, 33(12): 2788-2800. Wang Deyu, Duan Yuanchao, Gao He, et al.Current output characteristics and implementation of soft switch based on LCC resonant converter[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(12): 2788-2800. [10] Outeiro M T, Buja G, Czarkowski D.Resonant power converters: an overview with multiple elements in the resonant tank network[J]. IEEE Industrial Electronics Magazine, 2016, 10(2): 21-45. [11] Jaritz M, Biela J.115kV solid state long pulse modulator for the European spallation source (ESS)[C]// IEEE 21st International Conference on Pulsed Power, Brighton, 2017: 1-4. [12] Mao Saijun, Wu Tao, Lu Xi, et al.High frequency high voltage power conversion with silicon carbide power semiconductor devices[C]//6th Electronic System- Integration Technology Conference, Grenoble, 2016: 1-5. [13] Mao Saijun, Popovic J, Ferreira J A, et al.Comparative analysis and evaluation of high voltage power generation architectures[C]//IEEE Energy Conversion Congress and Exposition, Cincinnati, OH, 2017: 4753-4760. [14] Mao Saijun, Li Chengmin, Li Wuhua, et al.Review of high frequency high voltage generation archite- ctures[C]//IEEE 3rd International Future Energy Electronics Conference and ECCE Asia, Kaohsiung, 2017: 2260-2266. [15] Jaritz M, Biela J.Output voltage ripple analysis for modular series parallel resonant converter systems with capacitive output filter[C]//20th European Conference on Power Electronics and Applications, Riga, 2018: 1-10. [16] Wang Hongliang, Chen Yang, Hu Zhiyuan, et al.An algorithm to analyze circulating current for multi- phase resonant converter[C]//IEEE Applied Power Electronics Conference and Exposition, Long Beach, CA, 2016: 899-906. [17] 高贺. 三相LCC串并联谐振变换器的研究[D]. 哈尔滨: 哈尔滨工业大学, 2017. [18] 石岩. 宽范围输出的三相LCC谐振变换器研究[D]. 哈尔滨: 哈尔滨工业大学, 2016. [19] Sanders S R, Noworolski J M, Liu Xiaojun, et al.Generalized averaging method for power conversion circuits[J]. IEEE Transactions on Power Electronics, 1991, 6(2): 251-259. [20] Maksimovic D, Stankovic A M, Thottuvelil V J, et al.Modeling and simulation of power electronic con- verters[J]. Proceedings of the IEEE, 2001, 89(6): 898-912.
2020, Vol. 35 
