Wind Turbine Load Management via Multi-Parameter Control
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Solution Overview
Problem
Existing wind turbine power generating apparatus operation methods primarily rely on wind velocity to determine load changes, neglecting other critical factors like rotation speed and moments, which can lead to excessive loads on components, potentially causing damage and reducing operational efficiency.
Innovation Solution
A method for operating wind turbines that considers loads on blades, moments, and acceleration to select appropriate operation modes, including load-suppressing modes, to reduce stress on components and enhance power generation by adjusting rotation speed and pitch angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If operation mode is selected solely on the basis of wind velocity, then the control method is simple, but the load on wind turbine components cannot be appropriately reduced
Solution Approach 1:
The patent changes the control parameters from solely wind velocity to multiple parameters including wind velocity, rotation speed, and pitch angle. This allows the system to comprehensively evaluate blade loads and select appropriate operation modes, resolving the contradiction between control simplicity and load reduction effectiveness.
Solution Approach 2:
The patent implements dynamic selection of operation modes based on real-time monitoring of multiple parameters. The control system dynamically adjusts the operation mode (normal operation or load-suppressing operation) according to the current load conditions, enabling appropriate load reduction while maintaining power generation efficiency.
2Productivity
If normal operation mode is maintained under high load conditions, then power generation efficiency is maximized, but the risk of blade-tower contact and component damage increases
Solution Approach 1:
The patent employs feedback control by continuously monitoring wind velocity, rotation speed, and pitch angle to evaluate blade loads. Based on this feedback, the system automatically selects the appropriate operation mode to prevent blade-tower contact while maintaining power generation efficiency when conditions permit.
Solution Approach 2:
The patent applies preliminary anti-action by predicting potential blade-tower contact risks through multi-parameter evaluation and proactively switching to load-suppressing operation mode before contact occurs. This preventive approach reduces the risk of component damage while allowing normal operation when safe.
3Reliability
If load-suppressing operation mode is frequently activated, then component loads are reduced, but overall power generation output decreases
Solution Approach 1:
The patent applies partial action by selectively activating load-suppressing operation mode only when necessary based on comprehensive load evaluation. The system uses multiple parameters to determine when load suppression is truly needed, avoiding unnecessary reductions in power generation output while still protecting components when required.
Data Source
AI summary
A method of operating a wind turbine power generating apparatus including a wind turbine rotor having a wind turbine blade includes: a step of obtaining a load applied to the wind turbine blade; and a step of selecting an operation mode of the wind turbine power generating apparatus on the basis of the load, from among a plurality of operation modes including a normal operation mode and at least one load-suppressing operation mode in which the load applied to the wind turbine blade is smaller than in the normal operation mode.