Modeling and Closed Loop Control of Three Phase Double Active Bridge DC Transformer
Song Shengli1, Li Zhuoqiang2, Yao Zhi3, Chen Dong4, Xu Jinghui2
1. State Grid Corporation of China Beijing 100031 China; 2. School of Electrical Engineering Xi’an jiaotong University Xi’an 710049 China; 3. State Grid Ningxia EPRI Yinchuan 750001 China; 4. State Grid Economic and Technological Research Institute Beijing 102209 China
Abstract：As a kind of isolated bidirectional DC converter, three-phase dual active bridge (DAB) DC converter has many advantages, such as electrical isolation, high power density, wide voltage transmission range and easy to realize soft switching. In this paper, the modeling and control methods of three-phase DAB converter are studied. To solve the problem of low accuracy of existing modeling methods for three-phase DC converter, a three-phase DAB model based on second-order generalized state space averaging method is proposed. In this paper, a current RMS optimal modulation strategy based on interior point method is proposed. On this basis, a closed-loop control method with optimal amplitude limitation is proposed to improve the dynamic response of the system. Finally, a 1.1kW three-phase DAB DC converter experimental platform is built by using the combined simulation of Matlab/Simulink and PLECS to verify the accuracy of the proposed model. When the output voltage instruction v2ref changes from 60V to 80V, the traditional closed-loop method needs 31ms to restore stability. The closed-loop control method proposed in this paper can achieve stable operation in 18ms, which greatly accelerates the dynamic response of the system.
宋胜利, 李卓强, 姚志, 陈东, 许景慧. 三相双有源桥式直流变换器建模与控制方法[J]. 电工技术学报, 2019, 34(zk2): 573-585.
Song Shengli, Li Zhuoqiang, Yao Zhi, Chen Dong, Xu Jinghui. Modeling and Closed Loop Control of Three Phase Double Active Bridge DC Transformer. Transactions of China Electrotechnical Society, 2019, 34(zk2): 573-585.
[1] 雷志方, 汪飞, 高艳霞, 等. 面向直流微网的双向DC-DC变换器研究现状和应用分析[J]. 电工技术学报, 2016, 31(22): 137-147. Lei Zhifang, Wang Fei, Gao Yanxia, et al.Research status and application analysis of bidirectional DC- DC converters for DC microgrid[J]. Transactions of China Electrotechnical Society, 2016, 31(22): 137-147. [2] Fu-Ming N, Tzung-Lin L.Implementation of a bidirectional three-phase dual-active-bridge DC con- verter with hybrid modulation for electric vehicle applications[C]//Intelligent Green Building and Smart Grid (IGBSG), Taipei, 2014: 1-4. [3] De Doncker RWAA, Divan D M, Kheraluwala M H.A three-phase soft-switched high-power-density DC/DC converter for high-power applications[J]. IEEE Transactions on Industry Applications, 1991, 27(1): 63-73. [4] 吴俊娟, 孟德越, 申彦峰, 等. 双重移相控制与传统移相控制相结合的双有源桥式DC-DC变换器优化控制策略[J]. 电工技术学报, 2016, 31(19): 97-105. Wu Junjuan, Meng Deyue, Shen Yanfeng, et al.Optimal control strategy of dual active bridge DC-DC converter based on dual phase-shifting control and traditional phase-shifting control[J]. Transactions of China Electrotechnical Society, 2016, 31(19): 97-105. [5] De Doncker RWAA, Divan DM, Kheraluwala MH.A three-phase soft-switched high-power-density DC/DC converter for high-power applications[J]. IEEE Transactions on Industry Applications, 1991, 27(1): 63-73. [6] Soltau N, Siddique H A B, De Doncker R W. Com- prehensive modeling and control strategies for a three-phase dual-active bridge[C]//International Con- ference on Renewable Energy Research and Appli- cations (ICRERA), Nagasaki, Japan, 2012: 1-6. [7] Engel Stefan P, Soltau Nils, Stagge Hanno, et al.Dynamic and balanced control of three-phase high- power dual-active bridge DC-DC converters in DC- grid applications[J]. IEEE Transactions on Power Electronics, 2013, 28(4): 1880-1889. [8] 沙广林, 王聪, 程红, 等. 移相控制的双有源桥DC-DC变换器统一相量分析法[J]. 电工技术学报, 2017, 32(18): 175-185. Sha Guanglin, Wang Cong, Cheng Hong, et al.Unified phasor analysis method for dual active bridge DC-DC converters with phase shift control[J]. Transactions of China Electrotechnical Society, 2017, 32(18): 175-185. [9] Kanamarlapudi V R K, Wang Benfei, So P L, et al. Analysis, design, and implementation of an APWM ZVZCS full-bridge DC-DC converter for battery charging in electric vehicles[J]. IEEE Transactions on Power Electronics, 2017, 32(8): 6145-6160. [10] Bai Hua, Mi Chris.Eliminate reactive power and increase system efficiency of isolated bi-directional dual-active-bridge DC-DC converters using novel dual-phase-shift control[J]. IEEE Transactions on Power Electronics, 2008, 23(6): 2905-2914. [11] 王聪, 沙广林, 王俊, 等. 基于双重移相控制的双有源桥DC-DC变换器的软开关[J]. 电工技术学报, 2015, 30(12): 106-113. Wang Cong, Sha Guanglin, Wang Jun, et al.The Analysis of zero voltage switching dual active bridge DC-DC converters based on dual-phase-shifting control[J]. Transactions of China Electrotechnical Society, 2015, 30(12): 106-113. [12] He P, Khaligh A.Comprehensive analyses and comparison of 1kW isolated DC-DC converters for bidirectional EV charging systems[J]. IEEE Transa- ctions on Transportation Electrification, 2017, 3(1): 147-156. [13] Zhou Haihua, Khambadkone A M.Hybrid modu- lation for dual active bridge bi-directional converter with extended power range for ultra capacitor application[J]. IEEE Transactions on Industry Applications, 2008, 45(4): 1434-1442. [14] Zhao Biao, Song Qiang, Liu Wenhua.Efficiency characterization and optimization of isolated bi- directional DC-DC converter based on dual-phase- shift control for DCD istribution application[J]. IEEE Transactions on Power Electronics, 2013, 28(4): 1711-1727. [15] 李午英. 全负载软开关的改进型双有源桥双向变换器研究[D]. 秦皇岛: 燕山大学, 2016. [16] Nocedal J, Wright S J.Numerical optimization[M]. New York, USA: Springer, 2006. [17] Waltz R A, Morales J L, Nocedal J, et al.An interior algorithm for nonlinear optimization that combines line search and trust region steps[J]. Mathematical Programming, 2006, 107(3): 391-408. [18] Qin Hengsi, Kimball J W.Generalized average modeling of dual active bridge DC-DC converter[J]. IEEE Transactions on Power Electronics, 2012, 27(4): 2078-2084. [19] Javaid U, Dujić D.Arbitrary order generalized state space average modeling of switching converters[C]// IEEE Energy Conversion Congress and Exposition (ECCE), Montreal, Canada, 2015: 6399-6406. [20] Engel SP, Soltau N, Stagge H, et al.Dynamic and balanced control of three-phase high-power dual- active bridge DC-DC converters in DC-grid appli- cations[J]. IEEE Transactions on Power Electronics, 2013, 28(4): 1880-1889. [21] 于德, 付超, 王毅, 等. 隔离型双向直流变换器的最小回流功率移相控制方法[J]. 电工技术学报, 2017, 32(24): 126-138. Yu De, Fu Chao, Wang Yi, et al.Phase-shifting control method of minimum return power for isolated bidirectional DC converter[J]. Transactions of China Electrotechnical Society, 2017, 32(24): 126-138. [22] 金莉, 刘邦银, 段善旭. 三电平双有源全桥DC-DC变换器回流功率最小的移相控制[J]. 电工技术学报, 2018, 33(24): 5864-5873. Jin Li, Liu Bangyin, Duan Shanxu.Phase-shifting control for minimum return power of three-level dual-active full-bridge DC-DC converter[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(24): 5864-5873.
2019, Vol. 34 
