Wind Farm Reactive Power Allocation Under PCC Voltage Differences
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Solution Overview
Problem
In wind farms, inconsistent distances of transmission lines to booster stations result in varying voltages across wind turbines, limiting reactive power adjustments and potentially triggering voltage protection, thereby restricting the reactive output for the entire cluster of wind turbines.
Innovation Solution
A method and apparatus for adjusting reactive power in a wind farm involve acquiring a wind farm reactive control parameter, calculating an average reactive control parameter for each wind turbine, modifying this parameter based on the voltage difference at the point of common coupling and preset voltage limits, and outputting these modified parameters to the wind turbines to prevent voltage protection and enhance reactive output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reactive power adjustment is limited by considering wind turbines with highest and lowest voltages, then voltage protection is avoided, but reactive power output for the wind farm is limited
Solution Approach 1:
The patent applies local quality by differentiating reactive power control strategies for different wind turbines based on their individual voltage conditions. Wind turbines are divided into different groups (first group with higher voltage, second group with lower voltage) and each group receives customized reactive power control parameters. This allows each wind turbine to operate optimally within its local voltage context, preventing voltage protection while maximizing overall reactive power output.
2Ease of operation
If uniform reactive control parameter is applied to all wind turbines, then control simplicity is maintained, but voltage differences cause protection triggering and output limitation
Solution Approach 1:
The patent implements parameter changes by dynamically adjusting reactive power control parameters based on real-time voltage measurements at different wind turbine locations. The control system calculates individualized reactive power setpoints for each wind turbine or group, modifying the uniform control approach to account for voltage differences. This maintains operational simplicity through automated calculation while enabling optimized reactive power output that adapts to varying voltage conditions.
Data Source
AI summary
The present application discloses a method and apparatus for adjusting a reactive power in a wind farm and an electronic device. The method for adjusting a reactive power in a wind farm includes: acquiring a wind farm reactive control parameter issued by a grid to the wind farm; calculating an average reactive control parameter for each of wind turbines in the wind farm according to the wind farm reactive control parameter; modifying, for each of the wind turbines, the average reactive control parameter according to a difference between a voltage of the wind turbine at a point of common coupling and a preset voltage limit to obtain wind turbine reactive control parameters of the respective wind turbines; and outputting the wind turbine reactive control parameters to the respective wind turbines.