Wind Farm Power Control Module with I Component Limiter
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Solution Overview
Problem
Wind farms face challenges in stabilizing the electrical supply network due to slow reaction times and limited ability to quickly respond to changing wind conditions, which can lead to instability when conventional power plants are shut down, necessitating improved power regulation methods.
Innovation Solution
A method and device utilizing a power control module with a P controller, I controller, and an I component limiter to regulate output power, allowing for precise control and rapid adjustments in response to wind conditions while maintaining grid stability without compromising wind turbine functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional power plants are shut down and replaced with wind farms, then regenerative energy production increases, but grid stability deteriorates due to slow reaction time of wind turbines to changing wind conditions
Solution Approach 1:
The control system is segmented into multiple independent controllers (P controller, I controller, D controller, and I component limiter) that operate in parallel. Each controller handles specific aspects of power regulation, allowing the system to respond to different types of disturbances simultaneously, thereby improving grid stability while maintaining high regenerative energy production
Solution Approach 2:
The control system dynamically adjusts the I component based on current operating conditions. The I component limiter prevents excessive integration that could cause instability during rapid wind condition changes, while allowing sufficient integration under stable conditions. This dynamic adaptation enables the wind farm to maintain grid stability across varying operational scenarios
2Use of energy by moving object
If wind farms are used to replace conventional power plants, then energy generation from renewable sources increases, but the reaction time to acute wind conditions becomes too slow
Solution Approach 1:
The control system is divided into multiple specialized controllers that process and respond to wind condition changes simultaneously. The P controller provides immediate proportional response, the D controller adds predictive damping, and the I controller handles long-term accumulation, enabling the system to react quickly to acute wind conditions while maintaining high renewable energy generation
Solution Approach 2:
The D (derivative) controller performs preliminary action by predicting future error based on the rate of change of current error. This anticipatory control allows the wind farm to prepare for upcoming wind condition changes, reducing reaction time and improving the speed of response to acute wind conditions
3Measurement precision
If a P controller and I controller are used for power regulation, then precise power control is achieved, but the system becomes complex and difficult to handle
Solution Approach 1:
The control system is segmented into modular controllers (P, I, D, and I component limiter) that can be independently configured and tuned. This modular architecture maintains precise power control while reducing overall system complexity, as each module handles a specific control function and can be adjusted without affecting the others
Solution Approach 2:
The control system employs feedback mechanisms where the output of each controller is monitored and used to adjust the others. The I component limiter uses feedback to prevent excessive integration, and the D controller uses feedback on the rate of change to provide predictive control. This feedback structure maintains precision while simplifying tuning through systematic adjustment of feedback parameters
4Power
If wind turbines are decentralized over a large area, then energy generation capacity increases, but control and regulation become difficult to handle
Solution Approach 1:
The control system is designed with universal controllers that can be deployed at each wind turbine location across the decentralized wind farm. Each controller performs multiple functions (power regulation, grid stability maintenance, wind condition response) simultaneously, enabling easy replication and standardized operation across the entire distributed system, thereby maintaining ease of operation while scaling energy generation capacity
Data Source
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Figure 7(A)~8(B)
AI summary
The invention relates to a method for the operation of a wind energy installation (100) and/or a wind farm (112) for supplying electric power to an electrical supply system (120), wherein output power, particularly active and/or reactive power (Q, P), is regulated by means of at least one power regulation module (501) of a regulatory and/or control device (131), having the steps of: prescribing a power regulation input value, determining a power regulation output value from the power regulation input value, and outputting a power regulation output value. According to the invention, the power regulation module has a P controller and an I controller and has an I-component limiter, wherein a first operating value of the power regulation input value is processed in the P controller to form a P component, a second operating value of the power regulation input value is processed in the I controller to form an I component, and a third operating value of the power regulation input value is processed in the I component limiter to form a limited I component, and the power regulation output value (POutput) is determined using the limited I component and the P component.