Wind Farm Power Control via Feeder Group Segmentation
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Solution Overview
Problem
Wind farms face challenges in regulating power output to maintain acceptable voltage and reactive power levels at the point of interconnect with the power grid, necessitating efficient control systems to manage wind turbine feeder groups and ensure compliance with predetermined specifications.
Innovation Solution
A wind farm power control system that includes a wind farm controller and automatic voltage regulator (AVR) to monitor and regulate power characteristics at the high-side of a generator step-up transformer, using breaker switches to selectively curtail feeder groups and adjust voltage set-points to maintain power within predetermined ranges, ensuring stable power delivery to the grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wind farm controller monitors and regulates power characteristics at the high-side of the GSU transformer using an AVR to maintain voltage within predetermined ranges, then power quality and grid stability are improved, but the device complexity increases due to the additional control systems and monitoring equipment required
Solution Approach 1:
The wind farm is divided into multiple feeder groups, each with its own breaker switch, allowing independent control and regulation. This segmentation enables the AVR to manage power characteristics by selectively connecting or disconnecting specific feeder groups, thereby maintaining grid stability without requiring complex centralized control of individual turbines.
Solution Approach 2:
The AVR continuously monitors the voltage at the high-side of the GSU transformer and provides feedback control by adjusting the connection status of feeder groups through breaker switches. This closed-loop feedback mechanism automatically regulates power characteristics to maintain voltage within predetermined ranges, improving reliability through automated response to grid conditions.
2Adaptability or versatility
If breaker switches are used to selectively curtail feeder groups to regulate power output, then adaptability to grid demands is improved, but the device complexity increases due to the additional switching equipment and control logic
Solution Approach 1:
Feeder groups are segmented and equipped with individual breaker switches, enabling selective curtailment of specific groups based on grid demands. This segmentation provides adaptability by allowing the system to respond to varying power requirements through targeted connection or disconnection of feeder groups, rather than requiring uniform control across all turbines.
Solution Approach 2:
The breaker switches enable dynamic reconfiguration of the wind farm's electrical topology by selectively connecting or disconnecting feeder groups. This dynamic capability allows the system to adapt its power output in real-time according to grid conditions, transforming a static configuration into a flexible, responsive system.
3Manufacturing precision
If the AVR regulates power characteristics by controlling voltage output of feeder groups, then power parameter compliance is improved, but the ease of operation decreases due to the automated control mechanisms requiring precise monitoring and adjustment
Solution Approach 1:
The AVR implements automated feedback control by continuously monitoring voltage at the high-side of the GSU transformer and automatically adjusting feeder group connections to maintain voltage within predetermined ranges. This eliminates the need for manual intervention to maintain power parameter compliance, improving precision while actually simplifying operation through automation rather than requiring complex manual control.
Solution Approach 2:
The control system performs self-service by automatically regulating its own output through the AVR's monitoring and adjustment of breaker switch positions. The system monitors its own power characteristics and autonomously makes corrections to maintain compliance, reducing the operational burden on human operators while ensuring precise parameter control.
Data Source
AI summary
One example includes a wind farm power control system. The system includes a wind farm controller configured to monitor a power characteristic at a high-side of a generator step-up (GSU) transformer. The high-side of the GSU transformer is coupled to a point-of-interconnect (POI) that provides power from the wind farm to a power grid. The system also includes an automatic voltage regulator (AVR) configured to monitor a voltage of a power bus associated with a low-side of the GSU transformer, the power bus being provided power from a plurality of feeder groups. Each of the plurality of feeder groups includes a plurality of wind turbines. The AVR can be further configured to regulate the power characteristic at the high-side of the GSU transformer to within a predetermined range of amplitudes based on the voltage of the power bus.