Characteristic Analysis of High-Frequency-Link Current of Series Resonant Indirect Matrix Type Power Electronics Transformer and Switching Frequency Design
Hu Yujie1,2, Li Zixin1,2, Luo Long1,2, Zhao Cong1,2, Li Yaohua1,2
1. Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Science Beijing 100190 China; 2. University of Chinese Academy of Sciences Beijing 100049 China
Abstract：Series resonant indirect matrix type power electronic transformer (PET) can achieve high power density by high frequency switching and reducing dc capacitance. However, small dc capacitors will change the equivalent capacitance of the resonant circuit and affect the high frequency resonant current characteristics. Then, the zero current switching (ZCS) may be lost. In this paper, the equivalent circuit of the series resonant indirect matrix type PET with small dc capacitors is established. Analytical expression of high frequency current in time domain is derived, and switching frequency is designed to achieve ZCS. The influence of dc capacitance and dead time on switching frequency is revealed. Simulation and experimental results verify the correctness of the theoretical analysis.
胡钰杰, 李子欣, 罗龙, 赵聪, 李耀华. 串联谐振间接矩阵型电力电子变压器高频电流特性分析及开关频率设计[J]. 电工技术学报, 2022, 37(6): 1442-1454.
Hu Yujie, Li Zixin, Luo Long, Zhao Cong, Li Yaohua. Characteristic Analysis of High-Frequency-Link Current of Series Resonant Indirect Matrix Type Power Electronics Transformer and Switching Frequency Design. Transactions of China Electrotechnical Society, 2022, 37(6): 1442-1454.
[1] 李子欣, 高范强, 赵聪, 等. 电力电子变压器技术研究综述[J]. 中国电机工程学报, 2018, 38(5): 1274-1289. Li Zixin, Gao Fanqiang, Zhao Cong, et al.Research review of power electronic transformer technolo-gies[J]. Proceedings of the CSEE, 2018, 38(5): 1274-1289. [2] 赵争鸣, 冯高辉, 袁立强, 等. 电能路由器的发展及其关键技术[J]. 中国电机工程学报, 2017, 37(13): 3823-3834. Zhao Zhengming, Feng Gaohui, Yuan Liqiang, et al.The development and key technologies of electric energy router[J]. Proceedings of the CSEE, 2017, 37(13): 3823-3834. [3] 涂春鸣, 兰征, 肖凡, 等. 模块化电力电子变压器的设计与实现[J]. 电工电能新技术, 2017, 36(5): 42-50. Tu Chunming, Lan Zheng, Xiao Fan, et al.Design and implementation of modular power electronic trans-former[J]. Advanced Technology of Electrical Engin-eering and Energy, 2017, 36(5): 42-50. [4] 刘建强, 赵楠, 孙帮成, 等. 基于LLC谐振变换器的电力电子牵引变压器控制策略研究[J]. 电工技术学报, 2019, 34(16): 3333-3344. Liu Jianqiang, Zhao Nan, Sun Bangcheng, et al.Research on control strategy of power electronic traction transformer based on LLC resonant con-verter[J]. Transactions of China Electrotechnical Society, 2019, 34(16): 3333-3344. [5] 王鹤, 栾钧翔. 变压器的电力电子化演进及其对电压稳定影响综述[J]. 电力系统保护与控制, 2020, 48(16): 171-187. Wang He, Luan Junxiang.Summary of power electronic evolution of transformer and its influence on voltage stability[J]. Power System Protection and Control, 2020, 48(16): 171-187. [6] Feng Jianghua, Chu Wenqiang, Zhang Zhixue, et al.Power electronic transformer-based railway traction systems: challenges and opportunities[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017, 5(3): 1237-1253. [7] Xu She, Huang A Q, Burgos R.Review of solid-state transformer technologies and their application in power distribution systems[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2013, 1(3): 186-198. [8] Huber J E, Kolar J W.Volume/weight/cost com-parison of a 1MVA 10kV/400V solid-state against a conventional low-frequency distribution transformer[C]// 2014 IEEE Energy Conversion Congress and Expo-sition, Pittsburgh, 2014: 4545-4552. [9] 李子欣, 高范强, 徐飞, 等. 中压配电网用10kV AC-750V DC/1MVA电力电子变压器功率密度影响因素研究[J]. 电工电能新技术, 2016, 35(6): 1-6. Li Zixin, Gao Fanqiang, Xu Fei, et al.Power density analysis of 10kV AC-750V DC/1MVA power elec-tronic transformer for medium voltage distribution grid[J]. Advanced Technology of Electrical Engineering and Energy, 2016, 35(6): 1-6. [10] Wang Dan, Tian Jie, Mao Chengxiong, et al.A 10kV/400V 500kVA electronic power transformer[J]. IEEE Transactions on Industrial Electronics, 2016, 63(11): 6653-6663. [11] 李响, 郝瑞祥, 游小杰, 等. 一种级联电力电子变压器直流电压平衡控制策略[J]. 电工技术学报, 2017, 32(2): 238-245. Li Xiang, Hao Ruixiang, You Xiaojie, et al.A DC voltage balance control strategy for the cascaded power electronic transformer[J]. Transactions of China Electrotechnical Society, 2017, 32(2): 238-245. [12] Liu Tao, Yang Xu, Chen Wenjie, et al.Design and implementation of high efficiency control scheme of dual active bridge based 10kV/1MW solid state transformer for PV application[J]. IEEE Transactions on Power Electronics, 2019, 34(5): 4223-4238. [13] 王杉杉, 王玉斌, 林意斐, 等. 级联型电力电子变压器电压与功率均衡控制方法[J]. 电工技术学报, 2016, 31(22): 92-99. Wang Shanshan, Wang Yubin, Lin Yifei, et al.Voltage and power balance control for cascaded power electronic transformer[J]. Transactions of China Electrotechnical Society, 2016, 31(22): 92-99. [14] 李子欣, 王平, 楚遵方, 等. 面向中高压智能配电网的电力电子变压器研究[J]. 电网技术, 2013, 37(9): 2592-2601. Li Zixin, Wang Ping, Chu Zunfang, et al.Research on medium-and high-voltage smart distribution grid oriented power electronic transformer[J]. Power System Technology, 2013, 37(9): 2592-2601. [15] Glinka M, Marquardt R.A new AC/AC-multilevel converter family applied to a single-phase con-verter[C]//The Fifth International Conference on Power Electronics and Drive Systems, Singapore, 2003: 16-23. [16] Glinka M.Prototype of multiphase modular-multilevel-converter with 2MW power rating and 17-level-output-voltage[C]//IEEE 35th Annual Power Electronics Specialists Conference, Aachen, Germany, 2004: 2572-2576. [17] McMurray W. Power converter circuits having a high frequency link. US, 3517300[P].1970-6-23. [18] Raju R N, Zhang R S, Stevanovic L D, et al. AC-AC converter with high frequency link, US, 8644037 B2[P].2008-7-15. [19] Raju R, Dame M, Steigerwald R.Solid-state trans-formers using silicon carbide-based modular building blocks[C]//2017 IEEE 12th International Conference on Power Electronics and Drive Systems, Honolulu, 2017: 1-7. [20] Wang Hui, Zhang Yichun, Sun Yao, et al.Topology and control method of a single-cell matrix-type solid-state transformer[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2020, 8(3): 2302-2312. [21] 付超, 武承杰, 孙玉巍, 等. 混合模块化直流固态变压器I: 工作原理及稳态特性分析[J]. 电工技术学报, 2019, 34(增刊1): 141-153. Fu Chao, Wu Chengjie, Sun Yuwei, et al.Hybrid modular DC solid state transformer I: working prin-ciple and analysis of steady state characteristics[J]. Transactions of China Electrotechnical Society, 2019, 34(S1): 141-153. [22] 付超, 高振, 孙玉巍, 等. 混合模块化直流固态变压器Ⅱ: 动态特性及快速响应控制[J]. 电工技术学报, 2019, 34(14): 2980-2989. Fu Chao, Gao Zhen, Sun Yuwei, et al.Hybrid modular direct current solid state transformer Ⅱ: dynamic characteristic and rapid response control[J]. Transactions of China Electrotechnical Society, 2019, 34(14): 2980-2989. [23] 周兵凯, 杨晓峰, 张智, 等. 能量路由器中双有源桥直流变换器多目标优化控制策略[J]. 电工技术学报, 2020, 35(14): 3030-3040. Zhou Bingkai, Yang Xiaofeng, Zhang Zhi, et al.Multi-objective optimization control strategy of dual-active-bridge DC-DC converter in electric energy router application[J]. Transactions of China Electro-technical Society, 2020, 35(14): 3030-3040. [24] Reinold H, Steiner M.Characterization of semi-conductor losses in series resonant DC-DC converters for high power applications using transformers with low leakage inductance[C]//Power Electronics and Applications European Conference, Lausanne, 1999: 1-10. [25] Lindenmüller L, Alvarez R, Bernet S.Optimization of a series resonant DC/DC converter for traction applications[C]//2012 IEEE Energy Conversion Congress and Exposition, Raleigh, NC, 2012: 2201-2208. [26] 杨博, 葛琼璇, 赵鲁, 等. 基于输入串联输出并联的双向全桥串联谐振DC-DC变换器系统控制策略研究[J]. 电工技术学报, 2020, 35(12): 2574-2584. Yang Bo, Ge Qiongxuan, Zhao Lu, et al.Control strategy of dual bridge series resonant DC-DC converter system based on input series output parallel connection[J]. Transactions of China Electrotechnical Society, 2020, 35(12): 2574-2584. [27] Qin Wei, Wu Xinke, Zhang Junming.A family of DC transformer (DCX) topologies based on new ZVZCS cells with DC resonant capacitance[J]. IEEE Transactions on Power Electronics, 2017, 32(4): 2822-2834. [28] Rothmund D, Huber J E, Kolar J W.Operating behavior and design of the half-cycle discontinuous conduction-mode series-resonant-converter with small DC link capacitors[C]//2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, Salt Lake City, 2013: 1-9. [29] Zhu Qianlai, Wang Li, Zhang Liqi.A 10kV DC transformer (DCX) based on current fed SRC and 15kV SiC MOSFETs[C]//2018 IEEE Applied Power Electronics Conference and Exposition, San Antonio, 2018: 149-155. [30] Zhu Qianlai, Wang Li, Huang A Q, et al.7.2kV single-stage solid-state transformer based on the current-fed series resonant converter and 15kV SiC MOSFETs[J]. IEEE Transactions on Power Elec-tronics, 2018, 34(2): 1099-1112.
2022, Vol. 37 
