Wind Farm Restoration Control via Fail-Safe Grid Communication
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Solution Overview
Problem
The increasing share of decentralized generation units, such as wind farms, complicates grid restoration processes due to reduced control options for grid operators and the dependency of wind farm feed-in capacities on weather conditions.
Innovation Solution
A method and communication device for controlling grid restoration, which includes a wind farm control center that communicates with a grid control center via fail-safe connections, allowing for direct control of wind farms during grid restoration, including activation of reserve power, frequency-dependent active power control, and voltage-dependent reactive power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If decentralized generation units like wind farms are integrated into the electrical supply network, then the diversity of power sources increases, but the control options for grid operators during restoration are reduced
Solution Approach 1:
The patent introduces a wind farm control center as an intermediary between the grid operator and the wind farm. This control center enables direct control of the wind farm during grid restoration, allowing grid operators to manage decentralized units effectively. The control center receives control signals from the grid operator and translates them into appropriate commands for the wind farm, thus resolving the control issue while maintaining the benefits of decentralized generation.
2Power
If wind farms are used during grid restoration, then additional power sources become available, but the feed-in capacities become unpredictable due to weather dependency
Solution Approach 1:
The patent implements feedback mechanisms where the wind farm control center continuously monitors wind conditions, power generation capacity, and grid restoration progress. Based on this feedback, the control center dynamically adjusts the wind farm's feed-in capacity to match actual grid needs and available wind resources. This allows for reliable power contribution despite weather variability, as the system adapts in real-time to changing conditions.
3Ease of operation
If direct control connections are established between grid control center and wind farms, then control capability improves, but the complexity of the communication system increases
Solution Approach 1:
The patent merges the control functions for multiple wind farms into a single wind farm control center. Instead of establishing separate direct control connections from the grid operator to each individual wind farm, the control center consolidates these connections and manages all wind farms through a unified interface. This reduces the overall communication system complexity while maintaining comprehensive control capability.
Data Source
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AI summary
The invention relates to a method for controlling the restoration of an electrical supply network (120), wherein: the electrical supply network (120) has a first network section (302) and at least one further network section (302); at least one wind farm (304) is connected to the first network section (302); the wind farm (304) is controllable via a wind farm control station (320); the first network section (302) is coupled to the at least one further network section (342) via at least one switching device (340) in order to transmit electrical power between the network sections (302, 342); the at least one switching device (340) is designed to disconnect the first network section (302) from the at least one further network section (342) in the event of a fault; a network control centre is provided to control the at least one switching device (342); the first network section (302) is disconnected from the at least one further network section (342) by the at least one switching device (340) in the event of a fault in which a network fault acting on the first network section (302) occurs; the wind farm control station (320) exchanges data with the network control centre (324) via a control station link (326); the control station link (326) is a fail-safe communication link between the wind farm control station (320) and the network control centre (324) and can be operated independently of the electrical supply network (120), in particular even if there is a fault in the first network section (302); the wind farm (304) receives data from the network control centre (324) via a wind farm link (328); the wind farm link (328) is a fail-safe communication link between the wind farm (304) and the network control centre (324) and can be operated independently of the electrical supply network (120), in particular even if there is a fault in the first network section (302); and further data which are not transmitted via the control station link (326) and not via the wind farm link (328) are transmitted via a further data link (322, 332) as long as the latter has not failed.