Abstract:

Taking a high gain boost Cuk converter with scalable unit as the research object,an improved single-cycle control strategy based on linear active disturbance rejection is proposed.A control method combining linear active disturbance rejection control strategy and single-cycle control technology is adopted to solve the problem that the single-cycle control technology has limited effect on the nonlinear characteristics and time-varying disturbance of Cuk converter when it is disturbed by the system.Compared with other control methods,the stability of large signal and the rapid recovery performance in case of disturbance is ensured.The simulation and experimental results show that the proposed control strategy can suppress the system disturbance more effectively and make the system more robust than the traditional single-cycle control.

Key words: single cycle control, step-up Cuk circuit, linear active disturbance rejection control technology, converter