Wind Turbine Deloading Control for Accurate Grid Frequency Regulation
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Solution Overview
Problem
Existing wind turbine frequency response controllers release kinetic energy for short-term power grid frequency support, leading to instability and inaccurate long-term frequency regulation due to single deloading amount selection based on experience.
Innovation Solution
Implement an adaptive deloading method that sets different deloading coefficients based on real-time frequency deviation and wind speed information to dynamically adjust wind turbine deloading rates during frequency regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wind turbine releases kinetic energy for short-term frequency support, then the power grid frequency stability is improved, but the wind turbine may stall and system stability deteriorates for long-term support
Solution Approach 1:
The patent implements dynamic deloading control by continuously adjusting the deloading coefficient based on real-time frequency deviation and rate of change of frequency. The control coefficient is dynamically updated during frequency regulation events, allowing the wind turbine to adapt its power output to match grid needs while maintaining operational stability.
Solution Approach 2:
The patent changes the operating parameters of the wind turbine by adjusting the deloading coefficient, which modifies the relationship between wind speed and power output. This parameter adjustment enables the turbine to operate at reduced power levels during frequency events, providing grid support while avoiding stall conditions.
2Ease of operation
If a single deloading amount is selected based on experience, then the control implementation is simplified, but the frequency regulation accuracy deteriorates
Solution Approach 1:
The patent implements feedback control by continuously monitoring frequency deviation and rate of change of frequency, then using this information to adjust the deloading coefficient. This closed-loop approach ensures accurate frequency regulation while maintaining relatively simple control logic that can be implemented in existing wind turbine systems.
Solution Approach 2:
The control system transitions from static experience-based deloading to dynamic coefficient adjustment based on real-time grid conditions. The deloading coefficient is continuously updated according to frequency deviation and its rate of change, providing accurate regulation without requiring complex control algorithms.
Data Source
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AI summary
The present invention discloses a frequency regulation method and device for a power grid using a wind turbine, wherein the method comprises steps of: real-time achieving a frequency information of the power grid at a connection point of the wind turbine and a wind speed information of the wind turbine, wherein the frequency information comprises a frequency deviation and a rate of change of frequency; in response to the frequency deviation being greater than a deviation threshold, determining an adaptive deloading coefficient according to the rate of change of frequency, wherein the adaptive deloading coefficient is set based on the rate of change of frequency and the wind speed information of the wind turbine; determining a deloading information of frequency regulation for the power grid using a wind turbine according to the determined adaptive deloading coefficient, the frequency deviation and the wind speed information of the wind turbine; performing frequency regulation on the power grid using the wind turbine according to the deloading information and the wind speed information of the wind turbine. By the present invention, the deloading of frequency regulation at different times for the power grid using a wind turbine can be effectively controlled, and the accuracy of the frequency regulation for the power grid using a wind turbine can be improved.