Wind Turbine Converter Control for Grid Interference Override
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wind turbines connected via converters face challenges in stabilizing the electrical grid due to differences in regulation strategies compared to conventional power stations, leading to ineffective counteraction of grid interference, particularly in quick voltage and frequency changes.
Innovation Solution
A controller module with a grid interference module and an override module is used in wind turbines to identify and deactivate ineffective grid stabilization functions during interference, allowing only effective functions to counteract grid disturbances, utilizing sensors to evaluate voltage and frequency characteristics for adaptive regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wind turbines activate grid stabilization functions to counteract grid interference, then grid support capability is improved, but in some cases the stabilization functions can counteract the interference and prevent grid stabilization
Solution Approach 1:
The control system dynamically switches between different operational modes (normal mode and override mode) based on real-time grid conditions. The override module can deactivate specific grid stabilization functions when they are determined to be counterproductive, allowing the wind turbine to adapt its behavior to different interference scenarios while maintaining grid support capability when beneficial
Solution Approach 2:
The system changes the operational parameters of the grid stabilization functions by switching them on or off based on grid conditions. The controller module monitors grid parameters (voltage, frequency) and adjusts the activation state of stabilization functions accordingly, changing from full stabilization activation to selective deactivation when interference patterns indicate potential counteraction
2Reliability
If wind turbines quickly regulate voltage to maintain constant injection point voltage, then voltage stability is improved, but this can compensate for voltage changes made by power stations to regulate active power balance
Solution Approach 1:
The control system dynamically adjusts the priority and activation of voltage regulation versus active power regulation based on grid conditions. During grid interference, the override module can temporarily prioritize active power regulation by deactivating voltage-stabilizing functions that would otherwise counteract power station regulation efforts
Solution Approach 2:
The controller continuously monitors grid voltage and frequency parameters and uses this feedback to determine when to switch between normal operation and override mode. The feedback mechanism allows the system to detect when voltage regulation is counteracting power station efforts and adjust accordingly
3Object-affected harmful factors
If wind turbines deactivate grid stabilization functions during interference, then counteraction of harmful effects is improved, but device complexity increases due to override module
Solution Approach 1:
The override module serves multiple functions: it monitors grid conditions, determines when stabilization functions are counterproductive, and executes deactivation commands. This multi-functionality reduces the need for separate dedicated components for each task, thereby limiting the increase in device complexity while improving harmful factor counteraction
Data Source
AI summary
A wind turbine comprising a converter connected to a generator, which converter supplies at least some of the energy generated by the electrical generator into an electrical grid, sensors for interference in the electrical grid and a controller module for controlling the converter and/or the wind turbine. The controller module comprises a grid interference module which, in the case of detected interference in the electrical grid, counteracts the interference. The controller module comprises an override module which, in the case of a detected interference in the grid, is provided in order to deactivate the grid interference module at least in part. This improves the behavior in interference situations in that the controller module detects, over the course of the interference, that at least parts of the inherent grid stabilization functions do not counteract the interference and, in this specific situation, it deactivates the respective harmful grid stabilization functions.