Wind speed segment adaptive control method for network configuration type doubly-fed wind turbine based on equivalent impedance

By using an adaptive control method based on equivalent impedance modeling and segmented wind speed regulation, the voltage support capability and rotor current limiting of the wind turbine are coordinated, solving the problems of operational stability and safety of grid-type doubly-fed wind turbines under different wind speed conditions, and improving the operational capability in grids with high penetration of new energy sources.

CN122203449APending Publication Date: 2026-06-12ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID JIBEI ELECTRIC POWER CO LTD +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID JIBEI ELECTRIC POWER CO LTD
Filing Date
2026-02-03
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

In scenarios with high penetration of new energy sources, existing grid-type doubly fed wind turbines are significantly affected by wind speed changes in current characteristics and voltage support capabilities. It is difficult to balance voltage support capabilities and rotor current constraints under different wind speed conditions, leading to operational stability and safety issues.

Method used

A segmented adaptive control method for wind speed of a grid-type doubly fed wind turbine based on equivalent impedance is adopted. By combining equivalent impedance modeling with segmented wind speed adjustment, the voltage support capability and rotor current limiting requirements of the wind turbine are coordinated. This includes the adaptive adjustment of operating parameters, wind speed determination, and control parameters.

Benefits of technology

This technology enables dynamic adjustment of control parameters based on wind speed conditions during grid voltage disturbances, improving the operational stability and safety of the wind turbine under voltage disturbance conditions and reducing the risk of overcurrent in the rotor-side converter.

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Abstract

The application relates to a network-constructing doubly-fed wind turbine wind speed segment adaptive control method based on equivalent impedance, which is applied to the network-constructing doubly-fed wind turbine grid-connected operation process. When voltage disturbance occurs in the power grid, the wind turbine operation control parameters are adaptively adjusted by combining equivalent impedance modeling and wind speed segment regulation. The method comprises the following steps: collecting wind turbine operation parameters, determining the operation condition, determining the segments according to the wind speed, adaptively adjusting the control parameters based on the equivalent impedance model, updating the control parameters to form a closed-loop control process. Through the method, the coordination between the voltage support capability and the rotor current limiting requirement of the network-constructing doubly-fed wind turbine under different wind speed conditions is realized, and the operation stability and safety of the wind turbine under the voltage disturbance condition are improved.
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