Wind Turbine Active Power Detection via Kinetic Energy Release
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Solution Overview
Problem
Accurate detection of available active power in wind turbines is crucial for providing frequency-regulated power to the grid, but existing methods lack precision, affecting the stability and efficiency of wind turbine operations.
Innovation Solution
A method and device that acquire current rotation speed and outputted active power to determine effective wind speed, maximum active power capture, and release power, enabling accurate estimation of available active power by considering power loss and kinetic energy release, thereby enhancing frequency regulation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing methods are used to detect available active power, then the detection process is simple, but the measurement precision is insufficient
Solution Approach 1:
The patent segments the available active power detection into multiple components: current active power measurement, kinetic energy calculation, maximum power point tracking, and power loss estimation. Each component is calculated separately and then combined to obtain the total available active power, improving precision while maintaining manageable complexity
Solution Approach 2:
The patent performs preliminary calculations of rotor kinetic energy, wind speed estimation, and maximum power point prediction before determining the final available active power. This preliminary action allows for more accurate real-time detection by pre-computing parameters that influence the final result
2Reliability
If accurate estimation of available active power is implemented, then frequency regulation capability is improved, but the calculation complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the detected available active power is continuously compared with actual grid frequency deviations. The system adjusts its estimation parameters based on the effectiveness of frequency regulation, improving reliability while optimizing calculation complexity through adaptive learning
Solution Approach 2:
The patent dynamically changes key parameters such as wind speed estimation, rotor speed, and power coefficients based on real-time operating conditions. By adapting parameters to current state, the system achieves high frequency regulation reliability without requiring excessively complex fixed-structure calculations
3Reliability
If maximum frequency-regulated power is provided to the power grid, then the frequency stability is improved, but the wind turbine operation stability may be affected
Solution Approach 1:
The patent calculates available active power by considering both the maximum extractable power from wind and the kinetic energy reserve in the rotor. It applies partial action by releasing only the necessary amount of kinetic energy to meet frequency regulation requirements while maintaining sufficient reserve to ensure wind turbine operational stability
Data Source
AI summary
A method and a device for detecting an active power of a wind turbine. The method includes: acquiring a current rotation speed of a rotor of a wind turbine and a current outputted active power; determining an effective wind speed of the wind turbine; determining a maximum active power capable to be captured by the wind turbine at the current rotation speed; determining a maximum active power capable to be outputted by the wind turbine, and determining a release power at which the wind turbine is capable to release a rotation kinetic energy of the wind turbine for a predetermined time at the current rotation speed; and determining the available active power of the wind turbine, based on the maximum active power capable to be outputted, the release power, and the current outputted active power.