Simplified Analysis Model and Optimal Control Strategy of TripleActiveBridge Converter
Liu Bei1, Shuai Zhikang1, Xiao Fan1, Tu Chunming1, Zhou Da2
1. National Engineering Research Centerfor Electricity Transformation and Control Hunan University Changsha 410082 China; 2. Marketing Service CenterState Grid Jiangsu Electric Power Co. Ltd Nanjing 210019 China
Abstract：Under the traditional single-phase-shift (SPS) strategy, there is a large backflow power in the triple-active-bridge (TAB) converter, the backflow power increases the RMS currentand the loss of the converter. Multi-phase-shift (MPS) strategy can improve the control flexibility and reduce the backflow power, but the analysis process and the phase shift angle selection method are extremely complicated. To solve this problem, this paper proposed a simplified analysis model based on multiple phase shifts and an optimized control strategy. Firstly, this paper established the equivalent Fourier series model of TAB converter, derived the unified expression form of TAB converter under MPS control strategy, and proposed a simplified analysis model of TAB converter, which reduces the difficulty of analysis and calculation of TAB converter. On this basis, an optimized control strategy based on reactive power is proposed, which can reduce the RMS currentand the loss of TAB converter. Finally, simulation and experiment verified the effectiveness of the proposed control strategy.
刘贝, 帅智康, 肖凡, 涂春鸣, 周达. 三有源桥变换器简化分析模型及优化控制策略[J]. 电工技术学报, 2021, 36(11): 2394-2407.
Liu Bei, Shuai Zhikang, Xiao Fan, Tu Chunming, Zhou Da. Simplified Analysis Model and Optimal Control Strategy of TripleActiveBridge Converter. Transactions of China Electrotechnical Society, 2021, 36(11): 2394-2407.
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2021, Vol. 36 
