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YANG Guorun,XIAO Fei,FAN Xuexin,WANG Ruitian,LIU Jilong.Hybrid Modeling and Control for Three-level DC-DC Converter[J].JOURNAL OF POWER SUPPLY,2018,16(3):1-8
Hybrid Modeling and Control for Three-level DC-DC Converter
Received:May 25, 2016  Revised:July 30, 2017
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DOI:10.13234/j.issn.2095-2805.2018.3.1
Keywords:three-level DC-DC converter  hybrid automaton  state-transition condition  state flow chart
Fund Project:The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
              
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YANG Guorun National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan , China
XIAO Fei National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan , China xfeyninger@gmail.com
FAN Xuexin National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan , China
WANG Ruitian National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan , China
LIU Jilong National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan , China
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Abstract:
      A hybrid automaton model is established for a three-level DC-DC converter, and the corresponding closed-loop algorithm is proposed, whose core idea is to trap the system into a stable limit cycle while regulating the output voltage. This algorithm is applicable to both continuous current mode(CCM) and discontinuous current mode(DCM), making it viable over a wide operating range. The regulation problem of output voltage is transformed into a selection problem of the transition conditions for discrete states, and the transition conditions are derived. A hybrid-automaton-based three-level DC-DC converter control system is implemented using the state flow chart in Matlab/Simulink, and extensive simulations are carried out to check the closed-loop control algorithm. Simulation results show that the steady-state performances of the three-level DC-DC converter in four operating states are all satisfactory, with fast dynamic response and small overshoot during the transition of operating states.
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