Wind Farm Active Power Distribution Strategy
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Solution Overview
Problem
Conventional wind farm power distribution methods result in non-uniform active power changes across wind turbines, leading to prolonged frequency modulation control response times and increased turbine impact during grid frequency modulation.
Innovation Solution
A method and device that calculate and distribute active power variations to wind turbines based on current grid frequency changes, using preset strategies to equalize single-unit active power variations, considering storage energy and lowerable power values, to ensure uniform power adjustments within each turbine's capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active power distribution methods are used during frequency modulation control, then the power grid frequency modulation demand can be met, but the active power value to be changed for each wind turbine becomes non-uniform, leading to long response time and great impact on wind turbines
Solution Approach 1:
The patent applies local quality by distributing active power variations to each wind turbine based on its individual operating state and capabilities. Each turbine receives a customized power adjustment command tailored to its specific condition (rotor speed, storage energy, current power output), rather than applying uniform adjustments across all turbines. This localized approach enables faster response times while maintaining overall system reliability.
Solution Approach 2:
The patent changes the parameter distribution strategy from uniform to variable based on turbine operating parameters. By calculating and distributing power variations according to each turbine's rotor speed, storage energy level, and current power output, the system optimizes the response time while meeting grid frequency modulation requirements. The parameter changes enable adaptive power distribution that reduces response time without compromising reliability.
2Reliability
If conventional active power distribution methods are used during frequency modulation control, then the power grid frequency modulation demand can be met, but the impact on wind turbines becomes great due to non-uniform power changes
Solution Approach 1:
The patent reduces harmful impacts on wind turbines by applying local quality principles. Each turbine's power adjustment is customized according to its operating state, preventing excessive or inappropriate power changes that could damage specific turbines. The system considers individual turbine capabilities and constraints, thereby reducing mechanical stress and operational risks while maintaining grid frequency modulation effectiveness.
Solution Approach 2:
The patent implements beforehand cushioning by evaluating each wind turbine's current operating state before distributing power variations. The system calculates appropriate power adjustments that account for each turbine's storage energy, rotor speed, and operational limits, thereby cushioning against potential harmful impacts before they occur. This preventive approach protects turbines from excessive stress while maintaining frequency modulation control effectiveness.
3Loss of time
If uniform active power variation is distributed to all wind turbines, then the response time is shortened, but the distribution does not consider individual turbine capabilities and operating states
Solution Approach 1:
The patent resolves this contradiction by applying local quality - distributing power variations according to each turbine's specific operating conditions rather than uniformly. The system calculates customized power adjustments based on individual turbine parameters (storage energy, rotor speed, current power), achieving both fast response times and high adaptability to individual turbine conditions.
Solution Approach 2:
The patent applies dynamics by making the power distribution strategy adaptive and variable rather than static and uniform. The system dynamically adjusts power variation distribution based on real-time turbine operating states, enabling both rapid response and adaptability to changing individual turbine conditions. This dynamic approach allows the system to optimize response time while maintaining versatility across different operating scenarios.
Data Source
AI summary
A method and device for distributing active power for a wind farm are provided. The method includes: calculating a current total active power variation of the wind farm according to a current frequency variation of a power grid; distributing a current single-unit active power variation to each wind turbine according to a first preset strategy based on the current total active power variation and a single-unit storage energy value in a case that the current total active power variation is greater than zero; distributing the current single-unit active power variation to each wind turbine according to the first preset strategy based on the current total active power variation and a lowerable power value in a case that the current total active power variation is smaller than zero; and controlling each wind turbine to adjust its operating state.