Active Disturbance rejection Hopf bifurcation suppression strategy based on DC microgrid DC-DC converter

Abstract To solve the problem that output voltage of Buck converter is easily affected by change system parameters, which reduces energy transmission quality, a linear active disturbance rejection control strategy proposed in this paper. Firstly, discrete mathematical model established to analyze Hopf bifurcation cause low-frequency oscillation voltage, and existence verified simulation. Secondly, based on theoretical analysis, suppression effect improving error feedback rate designed. Moreover, stability under analyzed using frequency-domain theory. Finally, traditional PI different working conditions compared simulation analysis. The results show can effectively suppress guarantee performance converter.