基于Buck/Boost-CLLLC谐振型三端口变换器的改进型滑模自抗扰控制OA

To address the issues of low integration,complex control architecture,sluggish dynamic response under complex operating conditions,and poor control-system robustness of conventional multi-port converters,a Buck/Boost-CLLLC resonant three-port converter with shared bridge arms is proposed.Furthermore,an improved sliding mode active disturbance rejection control(ISM-ADRC)strategy is developed for the proposed converter.First,the fundamental operating principles and voltage gain characteristics of the proposed converter are analyzed,revealing that load disturbances have a significantly impact on system stability.Second,an ISM-ADRC strategy integrating a continuous sliding mode control scheme with a state extended observer is designed to enhance the system's disturbance rejection capability while accelerating its dynamic response.Finally,comparative dynamic and steady-state experiments under different control strategies are conducted using both simulations and a laboratory prototype.Experimental results demonstrate that,under ISM-ADRC,the prototype reaches a stable state within only 9 ms.Moreover,the output voltage overshoot under load step changes is reduced by 70%,and the dynamic response time is shortened by 62.5%.These results validate the effectiveness and feasibility of the proposed control strategy.