Wind Turbine Controller Energy Management During Grid Disconnection
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Solution Overview
Problem
Existing wind turbine systems face limitations in maintaining safe operation during disconnected states, particularly when not connected to the grid, due to limited energy storage capacity, leading to reduced safe operating time.
Innovation Solution
A wind turbine system with an energy supply unit that includes an energy storage device and a monitoring device, which switches the controller on or off based on wind parameters to conserve energy, ensuring operation only when necessary, and using a DC intermediate circuit for efficient energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller is continuously supplied with energy from the energy storage device in disconnected state, then the wind turbine can maintain safe operation and respond to wind parameter changes, but the energy consumption increases and safe operating time is limited
Solution Approach 1:
The controller is switched on and off periodically based on whether wind parameters require adjustment. The monitoring device continuously monitors wind parameters, and the controller is only activated when changes exceed predetermined thresholds, creating a periodic operation pattern that reduces energy consumption while maintaining safety
Solution Approach 2:
The system dynamically adjusts the controller's operational state based on real-time wind conditions. The controller transitions between active and inactive states depending on whether wind parameters (speed, direction, turbulence) require intervention, optimizing the balance between reliability and energy consumption
2Use of energy by moving object
If the controller is switched off to reduce energy consumption, then energy savings are achieved, but the wind turbine cannot respond to changing wind conditions
Solution Approach 1:
The monitoring device serves as an intermediary between the environment (wind conditions) and the controller. It continuously monitors wind parameters and triggers controller activation only when changes exceed predetermined thresholds, enabling the controller to respond appropriately without continuous operation
Solution Approach 2:
The system implements feedback through the monitoring device that continuously measures wind parameters and provides information to the power supply unit. This feedback mechanism enables the controller to be activated only when wind conditions require adjustment, maintaining adaptability while reducing energy consumption
3Duration of action of moving object
If high-capacity energy storage systems are used to extend disconnected state duration, then safe operating time is increased, but the system complexity and cost increase
Solution Approach 1:
The patent extracts the continuous control function from the controller and separates it into intermittent activation based on monitoring device triggers. This allows the system to extend safe operating time during disconnected states without requiring proportionally larger energy storage capacity, as the controller operates only when necessary
Data Source
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AI summary
The invention relates to a wind turbine system (10) for a wind turbine (100) with a controller (12) for controlling the wind turbine (100) and a power supply unit (30) with an energy storage device (36) and a grid connection (25) for connection to a grid (24), wherein the power supply unit (30) is configured to recognize a normal operating mode of the wind turbine (100), in which the wind turbine (100) is connected to the grid (24), and a disconnect state of the wind turbine (100), in which the wind turbine (100) is disconnected from the grid (24), and wherein the controller (12) is connected to a wind sensor (15) for detecting at least one wind parameter (42) and comprises an azimuth control (14) for setting an azimuth angle (56) of the wind turbine (100) depending on the wind parameter (42).The power supply unit (30) further comprises a monitoring device (38) which, in the disconnected state, is supplied with energy from the energy storage device (36) and is connected to the wind sensor (15) or another wind sensor (40) for detecting wind parameters (42) in the disconnected state. The power supply unit (30) is configured, in the disconnected state, to either switch the control unit (12) off from power or supply it with energy from the energy storage device (36), depending on the wind parameter (42) detected by the monitoring device (38). The invention further relates to a wind turbine (100) with a wind turbine system (10) and a method for operating a wind turbine (100).