Wind Turbine Grid Connection Timing Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wind turbine operation methods often result in inefficiencies due to energy consumption by components like inverters, generators, and transformers, leading to reduced power delivery to the grid, and require synchronization of rotational speeds before grid connection, which can delay energy production.
Innovation Solution
A method for operating a wind turbine that adjusts parameters to increase rotational speed and determines if the turbine will exceed a predetermined energy threshold, connecting to the grid only when this threshold is met, and maintains a substantially constant rotational speed for less than 5 seconds during the run-up phase to optimize energy delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wind turbine synchronizes rotational speed with the grid before connection, then the grid connection stability is improved, but the time required for energy production is increased
Solution Approach 1:
The control system performs preliminary assessment of rotational speed and energy threshold conditions before initiating grid connection. By evaluating whether the rotational speed exceeds the predetermined threshold and whether sufficient energy is available in advance, the system prepares for immediate connection without requiring post-connection synchronization adjustments, thus reducing time loss while maintaining stability.
2Reliability
If the wind turbine operates in traditional mode with extended constant rotational speed, then the grid synchronization is improved, but the energy delivery speed is reduced
Solution Approach 1:
The system dynamically adjusts the constant speed duration based on real-time conditions. Instead of operating with a fixed extended constant speed period, the control system determines the optimal duration of constant rotational speed operation, allowing the turbine to transition more quickly to energy delivery while maintaining sufficient grid synchronization stability.
Solution Approach 2:
The invention changes the parameter of constant speed duration from a traditional extended period to a shortened period of less than 5 seconds. This parameter modification enables faster energy delivery while the control system compensates to maintain adequate grid synchronization through intelligent connection timing based on energy threshold assessment.
3Productivity
If the wind turbine connects to the grid at lower energy thresholds, then the energy production efficiency is improved, but the energy loss during run-up is increased
Solution Approach 1:
The control system continuously monitors rotational speed and energy generation during the run-up phase, providing feedback to determine the optimal connection timing. By assessing whether the rotational speed exceeds the predetermined threshold and evaluating the current energy level, the system decides the precise moment to connect to the grid, maximizing energy production efficiency while minimizing run-up energy loss through intelligent connection timing.
Data Source
AI summary
The present disclosure relates to a method for operating a wind turbine, the wind turbine comprising a wind rotor having at least one rotor blade and a generator connected to the wind rotor, wherein the generator is adapted to be connected to a grid, wherein the method comprises: adjusting at least one wind turbine parameter to increase the rotational speed of the wind rotor; increasing the rotational speed of the wind rotor; during increasing of the rotational speed of the wind rotor determining if the wind turbine would exceed a predetermined amount of energy to be fed into the grid at the actual wind rotor rotational speed; and during increasing of the rotational speed of the wind rotor connecting the wind turbine to the grid if determining that the wind turbine would exceed the predetermined amount of energy to be fed into the grid. Further, the present disclosure relates to a wind turbine comprising a wind rotor, wherein the wind rotor is mechanically connected to a generator for transmitting the rotational power of the wind rotor having at least one rotor blade to the rotor of the generator, wherein the output current of the generator is adapted to be selectively connected to a grid by a circuit breaker, the wind turbine further comprising a control device adapted to close or to trip the circuit breaker, wherein the control device is adapted to perform the method disclosed herein.