A Virtual Resistor Control Scheme for Boost Converter

There are many control strategies for the boost converter, and a virtual resistor control scheme is introduced in this paper to improve its dynamic performance and stability. With consideration of nonlinearity, the state-space average model and the small-signal model of the boost converter are built and analyzed. Based on the small-signal model, the closed-loop control scheme with the virtual resistor is proposed to stabilize oscillation on the input DC bus and improve its stability. The theoretical analysis and essence are studied and illustrated. The impedance model with the control loop is calculated. Corresponding simulations are carried to validate the effectiveness and correctness of the virtual resistor control scheme.