Wind Power Plant Active Power Control Loop Using Loss Estimation
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Solution Overview
Problem
Existing wind power plants face significant delays in communication, leading to slow response times and inaccurate active power control, which hinder their ability to meet grid code requirements for inertia response and power boosting.
Innovation Solution
The implementation of a method that derives estimated and measured values for electrical losses in a wind power plant, using these values in an active power control loop with a regulator to improve response time and accuracy, including the use of a Low Pass Filter (LPF) and Balance of Plant Estimator to enhance controller stability and reduce communication delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional communication-based control is used, then system reliability is maintained, but response time is slow and measurement precision is poor
Solution Approach 1:
The system performs preliminary estimation of electrical losses using the Balance of Plant Estimator before actual power measurements are completed. By pre-calculating expected loss values based on operational parameters and historical data, the control system can compensate for measurement delays and communication lag, achieving faster response times without sacrificing accuracy.
Solution Approach 2:
The patent introduces an intermediary estimation mechanism that bridges the gap between actual power measurements and control decisions. The Balance of Plant Estimator acts as a mediator, providing predicted loss values that fill the information gap caused by communication delays, allowing the control loop to operate with higher effective precision and speed.
2Speed
If communication delays are reduced, then response time improves, but system complexity increases
Solution Approach 1:
The control system performs self-estimation of its own electrical losses using the Balance of Plant Estimator, which utilizes internally available operational parameters. This self-service approach eliminates the need for additional external measurement devices or complex communication infrastructure, achieving faster response times without proportionally increasing system complexity.
3Productivity
If power boost is implemented quickly, then grid code compliance is achieved, but control stability may be compromised
Solution Approach 1:
Before executing power boost commands, the system performs preliminary estimation of electrical losses and their impact on control stability. The Balance of Plant Estimator predicts how loss variations will affect the power loop, allowing the control system to pre-adjust parameters and maintain stability during rapid power transitions required by grid code compliance.
Data Source
AI summary
A method for controlling a wind power plant comprising a plurality of wind turbine generators, wherein the method comprises: deriving an estimated value for electrical losses in the wind power plant, deriving a measured value for electrical losses in the wind power plant, based on a difference between an aggregated power production from the plurality of wind turbine generators and a power measurement at a point of common coupling; applying the estimated value for electrical losses and the measured value for electrical losses in an active power control loop, comprising a regulator; and controlling by means of the active power control loop an active power production of the wind power plant at the point of common coupling.