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    • Power Generation Strategy of A Free Piston Engine Linear Generator Based on Quasi Proportional Resonance Control
    DOI：10.13949/j.cnki.nrjgc.2023.06.012
    Key Words:free piston engine linear generator（FPLG）  quasi proportional resonance control  space vector pulse width modulation  voltage control
    Author NameAffiliationE-mail
    LU Shuhao* Key Laboratory of Power Machinery and Engineering of Ministry of Education， Shanghai Jiao Tong University， Shanghai 200240， China lushuhao@sjtu.edu.cn 
    XIAO Jin Key Laboratory of Power Machinery and Engineering of Ministry of Education， Shanghai Jiao Tong University， Shanghai 200240， China  
    ZHANG Chen Key Laboratory of Power Machinery and Engineering of Ministry of Education， Shanghai Jiao Tong University， Shanghai 200240， China  
    CHENG Yingdong Key Laboratory of Power Machinery and Engineering of Ministry of Education， Shanghai Jiao Tong University， Shanghai 200240， China chengyingdong@sjtu.edu.cn 
    WANG Jinlong Key Laboratory of Power Machinery and Engineering of Ministry of Education， Shanghai Jiao Tong University， Shanghai 200240， China jinlongwang@sjtu.edu.cn 
    HUANG Zhen Key Laboratory of Power Machinery and Engineering of Ministry of Education， Shanghai Jiao Tong University， Shanghai 200240， China  
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    Abstract:To handle with the difficulty in applying three-phase induced electromotive force generated during stable operation of a free piston engine linear generator to the load or power battery， a dual closed loop alternating current/direct current（AC/DC） converter control strategy which based on voltage outer loop proportional integration（PI） control and current inner loop quasi proportional resonance（QPR） control was proposed， along with a bidirectional direct current/direct current（DC/DC） control strategy based on PI. This strategy can convert the three-phase induced electromotive force into a stable and controllable DC voltage. According to the dual closed loop AC/DC control strategy， a signal was generated to control the on-off of the switch tube of the three-phase voltage source rectifier， which rectified the three-phase induced electromotive force into a DC voltage with less fluctuation. Then， through the bidirectional DC/DC control strategy， the fluctuating DC voltage was converted into a stable and controllable voltage. Finally， a corresponding control model was built in the MATLAB/Simulink environment. The simulation results show that in the dual closed loop AC/DC control strategy， QPR control brings faster response speed and smaller voltage ripple on the DC side voltage compared to PI and proportional resonance control. The DC side voltage can stabilize at 400 V within 0.3 s， with a voltage ripple of 48.9 V. After adding a DC/DC converter， the DC side voltage can stabilize at 300 V within 0.2 s.
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