VIRTUAL SYNCHRONIZATION MOTOR CONTROL METHOD FOR ENERGY STORAGE AND CHARGING AND DISCHARGING OF ELECTRIC VEHICLE

摘要

A virtual synchronization motor control method for the energy storage and charging and discharging of an electric vehicle. A charging circuit is a high-frequency isolated PWM rectification circuit. The PWM rectification circuit comprises an AC interface and a DC interface which are connected in sequence, the AC interface is an H bridge AC/DC rectification circuit and is used for rectifying a grid voltage into a DC voltage of 600V; the DC interface is an isolated DC/DC convertor and is used for converting the DC voltage of 600V into a DC voltage of 48V to supply a load to the electric vehicle. The method comprises: (1) controlling an AC interface using a virtual synchronization motor control strategy; and(2) conducting control of double rings, i.e. an outer voltage ring and an inner current ring, on a DC interface. The control method can reduce the influence of an energy storage charging and discharging interface on the grid, thereby improving the adaptability of the grid to large-scale energy storage access. The DC interface is an isolated DC/DC convertor, so that the demand of an energy storage battery for charging at a quick constant power can be satisfied.