Control method for electric automobile participating in grid frequency modulation based on V2G technology

Abstract

The invention discloses a control method for an electric automobile participating in grid frequency modulation based on V2G technology. A charge/discharge circuit is a two-stage converter circuit, which comprises a PWM rectification circuit and a matched LC filter and a Buck-Boost conversion circuit, wherein the two circuits are connected through a DC bus capacitor; the PWM rectification circuit rectifies a network voltage into a 700V DC voltage, AC-side harmonic waves are filtered through the LC filter, and the PWM rectification circuit is connected with a power grid through a network-side inductor; and the Buck-Boost conversion circuit converts the 700V DC voltage into a 60V DC voltage, and is connected with an electric automobile directly. The method adopts an AC/DC control module and a DC/DC control module, and meanwhile, enables a frequency modulation control module to be embedded into the DC/DC control module; and charge and discharge power reference values of a power battery are given through the frequency modulation control module, and a current transformer makes a response to realize primary and secondary frequency modulation of the power grid.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and the stable operation and control of power systems, and in particular relates to a control method for electric vehicles participating in power grid frequency modulation based on V2G (Vehicle to Grid) technology, which considers the stability of power grid frequency operation and the lack of inertia of power electronic devices . Background technique [0002] The global energy crisis and environmental pollution have promoted the development of the electric vehicle industry in countries all over the world. The increasing number of electric vehicles brings great challenges and opportunities to the construction and development of power systems. On the one hand, a large number of electric vehicles are connected to the power grid as new loads for centralized charging. If they are not managed and guided, the peak power consumption of the power grid will increase, and the load on the power g...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problems of lack of inertia and frequency instability in the power system caused by a large number of electric vehicles connected to the network and the application of large-scale power electronic devices, combined with the advanced virtual synchronous machine control algorithm at the present stage, to realize the participation of electric vehicles in power grid frequency regulation functions, including primary frequency modulation and secondary frequency modulation without communication

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