A virtual synchronization control method and system for v2g system
A technology of virtual synchronization and control method, which is applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as inapplicability, and achieve the effect of improving reliability and virtual inertia
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Embodiment 1
[0050] Such as figure 2 The common virtual synchronous control strategy shown, the main idea is: use P / ω to simulate the mechanical torque T m , P ref / ω to simulate the electromagnetic torque T e , combined with the synchronous machine rotor equation After the active power control is completed, the obtained ω is integrated to obtain the phase angle difference θ between the output terminal voltage of the simulated synchronous machine and the grid voltage. The reactive part uses droop control to obtain the voltage amplitude E of the analog terminal, and synthesizes E and θ into the given voltage output of the converter, and then obtains the given current, and then compares it with the actual value of the current to obtain the PWM control signal. This control method is controlled by power / voltage / current three-loop control, the control is complicated, and it cannot realize precise control of power. The θ generated by this control method is applied to the transformation angl...
Embodiment 2
[0096] In one or more implementations, a virtual synchronization control system for a V2G system is disclosed, including:
[0097] A device for obtaining active and reactive power references from the grid side;
[0098] A device for collecting the output current and voltage of the inverter and calculating the output power of the inverter;
[0099] A device for outputting a given value of q-axis current through reactive power control and voltage droop control;
[0100] A device for outputting d-axis current given value through active power regulation and rotor motion equation;
[0101] A device for making a difference between the given value of the q-axis current and the current component of the actual current output by the inverter on the q-axis;
[0102] A device for making a difference between the given value of the d-axis current and the current component of the actual current output by the inverter on the d-axis;
[0103] A device for performing dq conversion on the dif...
Embodiment 3
[0106] In one or more embodiments, a virtual synchronization control system for a V2G system is disclosed, including a server, the server includes a memory, a processor, and a computer program stored on the memory and operable on the processor, so that When the processor executes the program, the virtual synchronization control method for the V2G system described in the first embodiment is implemented.
[0107]In one or more embodiments, a computer-readable storage medium is disclosed, on which a computer program is stored. When the program is executed by a processor, the virtual synchronization control method for a V2G system described in Embodiment 1 is executed.
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