Grid-forming device control method and apparatus, controller, device, and medium

By calculating the damping coefficient of the active power synchronization loop and the control parameters of the reactive power loop, a PWM signal is generated to control the operation of the grid-side converter. This solves the problem of inconsistent active power response of grid-type equipment under different grid intensities and improves the safety and reliability of the power system.

WO2026067653A1 Publication Date: 2026-04-02BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Patent Information

Application Number
PCT/CN2025/124496
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-09-26
Filing Date
2025-09-26
Publication Date
2026-04-02

AI Technical Summary

Technical Problem

Differences in power system structure lead to varying grid strengths in different regions, resulting in inconsistent active power response characteristics of grid-connected equipment under different grid strengths, which affects the safety and reliability of the power system.

Method used

By using the impedance, inertia time constant, and angular velocity parameters between the grid-side converter and the grid, and utilizing the second-order system characteristics of the active power synchronization loop, the damping coefficient of the active power synchronization loop is calculated. Combined with the control parameters of the reactive power loop, a PWM signal is generated to control the operation of the grid-side converter, so that the active power response characteristics of the grid-type equipment are consistent or tend to be consistent under different grid intensities.

Benefits of technology

It improves the predictability of the active power response characteristics of grid-connected equipment under different grid intensities, reduces or even avoids the risk of power system instability, and improves the safety and reliability of the power system.

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Abstract

The present application relates to the technical field of wind power, and discloses a grid-forming device control method and apparatus, a controller, a device, and a medium. The method comprises: on the basis of an impedance from a grid side converter to a power grid, a preset inertia time constant and a preset angular velocity parameter, obtaining a damping coefficient of an active power synchronous loop by using a second-order system characteristic of the active power synchronous loop; on the basis of the damping coefficient, the inertia time constant and a control parameter of the active power synchronous loop, performing active power synchronization calculation, to obtain an internal potential phase of a grid-forming device; on the basis of a control parameter of a reactive power closed loop, performing reactive closed loop control calculation, to obtain an internal potential amplitude of the grid-forming device; and by using a PWM signal generated on the basis of the internal potential phase and the internal potential amplitude, controlling the grid side converter to operate.
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