Wind Turbine Power Boost via Dynamic Crescent Function
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Solution Overview
Problem
Existing wind turbine power boosting methods result in inefficiencies and structural damage due to discrete power jumps and unnecessary pitch adjustments, leading to lost power and increased cumulative damage to turbine components.
Innovation Solution
A control method and circuit for wind turbines that utilize a dynamic boost operational function, which adjusts power output as a crescent function of wind speed or pitch angle, allowing for continuous power increase without exceeding structural limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If discrete step increase in power production is applied, then power boost is achieved above nominal power, but cumulative structural damage to pitch bearings increases due to unnecessary pitch adjustments
Solution Approach 1:
The patent applies dynamics by transitioning from a static, discrete step increase in power production to a dynamic, continuous crescent function that gradually increases power output. The boost operational function continuously adjusts the power reference signal based on the operational variable, eliminating abrupt changes and unnecessary pitch adjustments, thereby reducing cumulative structural damage to pitch bearings while achieving power boost.
Solution Approach 2:
The patent changes the parameter of power production from a discrete step function to a continuous crescent function of an operational variable. This parameter transformation allows smooth progression of power output from nominal to boosted levels, avoiding sudden jumps that trigger unnecessary pitch adjustments and reduce structural damage.
2Object-affected harmful factors
If boost threshold is delayed to avoid extreme loads, then structural loads are reduced, but significant power is lost due to delayed power boost application
Solution Approach 1:
The patent uses dynamics by implementing a continuous crescent function that gradually increases power output as the operational variable changes. This dynamic approach allows the system to capture power boost opportunities earlier and more continuously compared to discrete step increases, reducing power loss while maintaining load management through smooth transitions.
Solution Approach 2:
The patent applies continuity of useful action by using a crescent function that continuously increases power output rather than applying discrete steps. This continuous action ensures that power boost is applied as soon as conditions allow, maximizing energy capture without triggering unnecessary pitch adjustments, thereby reducing both power loss and structural loads.
3Power
If pitch angle is adjusted to balance power increase, then power output is balanced, but cumulative damage to pitch bearings increases due to extra pitch travel
Solution Approach 1:
The patent applies dynamics by using a continuous crescent function for power reference adjustment, which creates smooth, gradual changes in power output. This dynamic approach minimizes abrupt power changes that would require compensating pitch adjustments, thereby reducing extra pitch travel and extending pitch bearing life while maintaining power output.
Solution Approach 2:
The patent changes the parameter adjustment strategy from discrete pitch angle modifications to continuous power reference adjustments via a crescent function. This parameter transformation reduces the frequency and magnitude of pitch bearing movements, extending their operational life while achieving the desired power boost.
Data Source
AI summary
A method of controlling a wind turbine includes the step of boosting the output power of the wind turbine above the nominal power of the wind turbine, according to a boost operational function representing a boost level for the wind turbine. The boost operational function is a crescent function of an operational variable at least between a first threshold value and a second threshold value of the operational variable.