Adapting Wind Turbine Electrical Characteristic Curves
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Solution Overview
Problem
Existing methods for determining characteristic curves for wind energy installations are not reliable and delay commissioning, as they rely on predetermined curves that may not account for site-specific conditions, leading to inaccuracies and prolonged measurement periods.
Innovation Solution
A method and device that adapt predetermined characteristic curves for wind energy installations by measuring and incorporating actual operating conditions, using a combination of measured and predetermined characteristic values, with weighting to optimize the curve based on the number of measurements, allowing for immediate commissioning and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a predetermined characteristic curve is determined for a reference wind energy installation, then the commissioning process is simplified and can start immediately, but the characteristic values may deviate from actual site-specific conditions leading to reduced reliability
Solution Approach 1:
The patent applies preliminary action by determining a predetermined characteristic curve for a reference wind energy installation before the actual installation is commissioned. This preliminary characteristic curve allows immediate commissioning while site-specific measurements are collected and processed in the background to refine the curve later, thus resolving the contradiction between fast commissioning and accurate site-specific characteristics.
Solution Approach 2:
The patent implements feedback by continuously comparing measured characteristic values from the actual wind energy installation with the predetermined characteristic curve. The system uses this feedback to identify deviations and update the characteristic curve, thereby improving reliability while maintaining the initial advantage of immediate commissioning based on the reference curve.
2Reliability
If an individual characteristic curve is determined for each wind turbine before sale, then site-specific conditions are accounted for, but the process is time-consuming and delays commissioning
Solution Approach 1:
The patent performs preliminary determination of a characteristic curve using a reference installation of the same type, which provides a head start for commissioning. Site-specific measurements are then collected after commissioning begins, allowing the system to achieve both fast commissioning and accurate site-specific characteristics without the time loss of performing all measurements beforehand.
Solution Approach 2:
The patent makes the characteristic curve dynamic by allowing it to be updated after initial commissioning based on measured values from the actual installation. This dynamic approach enables the system to transition from a static reference curve to a refined site-specific curve, resolving the contradiction between immediate commissioning and accurate individual characteristics.
3Reliability
If experimental determination of the characteristic curve is performed only at the installation site, then accurate site-specific values are obtained, but the measurement period is prolonged delaying full commissioning
Solution Approach 1:
The patent performs preliminary measurement and determination of characteristic values using a reference installation of the same type before the actual installation is commissioned. This preliminary action provides a head start for commissioning while site-specific measurements are collected and processed in the background, thus reducing the overall measurement period while maintaining accuracy.
Solution Approach 2:
The patent implements a dynamic measurement approach where characteristic values are continuously measured and updated after initial commissioning. This allows the system to begin operation with preliminary values and progressively refine them with actual site data, eliminating the need to wait for complete measurement before commissioning while still achieving accurate site-specific characteristics.
Data Source
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AI summary
The invention relates to a method for determining a characteristic curve (9) for an electrical quantity (Pel, Q, ϕ, cos ϕ, IP, IQ) of a wind turbine (1). According to the invention, at least one characteristic value of the electrical quantity (Pel, Q, ϕ, cos ϕ, Ip, IQ) is measured for at least one wind value (vw), and for the at least one wind value (vw), a characteristic value of the electrical quantity (Pel, Q, ϕ, cos ϕ, IP, IQ) is adapted from a predetermined characteristic curve (7) containing characteristic values of the electrical quantity (Pel, Q, ϕ, cos ϕ, IP, IQ) as a function of various wind values (vw), taking into account the characteristic value measured for the at least one wind value (vw). The invention also relates to a corresponding device.