Method and device for parameter coordinated adaptive control in vsg, combined energy power generation system

By coordinating and adaptively controlling the virtual moment of inertia J and the virtual damping coefficient D in a virtual synchronous generator, the problem of single control in the existing technology is solved, and the frequency stability and response speed of the new energy power generation system are improved.

CN120546052BActive Publication Date: 2026-06-02CHINA UNIV OF MINING & TECH (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH (BEIJING)
Filing Date
2025-04-29
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In existing technologies, the virtual moment of inertia J and virtual damping coefficient D of virtual synchronous generators are controlled in a single way, which cannot be precisely controlled according to the frequency changes of the power system. The lack of comprehensive consideration of the relationship between the two leads to a decrease in the frequency stability of the new energy power generation system.

Method used

A collaborative adaptive control method using virtual moment of inertia J and virtual damping coefficient D is adopted. By establishing their relationship and dynamically adjusting the values ​​of J and D in different intervals, the method adapts to changes in grid frequency. Combined with arctangent function and small-signal analysis, the parameter tuning is optimized to achieve precise control.

Benefits of technology

It improves the frequency stability and response speed of the new energy power generation system, reduces frequency fluctuations and overshoot, shortens recovery time, and enhances the system's control flexibility and stability.

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Abstract

The present application relates to new energy power generation protection control device, smart grid and other technical fields, especially to a kind of method and device of parameter coordination adaptive control in VSG, joint energy power generation system.The present application VSG parameter coordination adaptive control method includes: step D, in virtual synchronous generator, the following control strategy of virtual moment of inertia J is used:Wherein, J0It is initial value of moment of inertia;ωIt is real-time angular velocity of power grid;ΔωIt is angular velocity deviation of power grid;T j It is angular velocity deviation change threshold;Step E, in virtual synchronous generator, the following control strategy of virtual damping coefficient D is used:Wherein, k d It is damping correction coefficient;ζIt is damping ratio, ω0It is standard angular velocity in power grid, S E It is the unit value of synchronous power of virtual synchronous generator;S n It is rated capacity of virtual synchronous generator.The J, D parameter coordination adaptive control strategy of the present application has better frequency fluctuation suppression performance.
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