An Energy Balance Active Disturbance Rejection Control for Improving Converter Stability While Maintaining Fast Dynamic Performance

Abstract

An energy balance active disturbance rejection control (EB-ADRC) is proposed in this letter, which advances fast dynamics and enlarged stability region, suitable for the stability enhancement of converters cascaded with constant power loads. A unified converter energy control is employed to simplify the converter dynamic model to a first order, which is easy for dynamic design. Takagi-Sugeno (TS) fuzzy models are constructed and linear matrix inequalities (LMI) solving method is utilized to not only evaluate the upper limit of controller gain, but also make stability comparisons between EB-ADRC and classical proportional integral (PI) control. In the same main circuit inductor and capacitor values and approximate dynamic response precondition, the results illustrate that EB-ADRC enables a larger stability region. Experimental results are provided to validate the effectiveness and superiority of the proposed control scheme.