Application of Fractional Kalman Filter in Modal Analysis of Buck-Boost Converter

In practical application, both inductance and capacitor are fractional order in nature. Based on the fractional order model of Buck - boost converter operating in discontinuous mode of inductance current, the simulation application of fractional order Kalman filter is studied. The existing research results have proved that the fractional order mathematical simulation model can more accurately describe the working characteristics of Buck - boost converter in the discontinuous mode of inductor current. Therefore, the filtering accuracy of the fractional order model is higher than that of the integer order model. The simulation results verify the effectiveness and feasibility of the proposed algorithm.