Substation Flange Connection for Compact Offshore Design
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Solution Overview
Problem
Conventional substations require significant space and incur high costs due to complex connections between transformers and switchgear, especially in offshore installations, where gas-insulated lines and high-voltage cables are space-intensive and prone to mechanical stresses.
Innovation Solution
A substation design featuring a gas-insulated switchgear housed in a thermally decoupled enclosure with a direct flange connection to the transformer, eliminating the need for lengthy connections and allowing for a compact, rigid, and detachable coupling, thus simplifying installation and reducing space and mass requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas-insulated lines or high-voltage cables are used to connect transformers and switchgear, then electrical connection is achieved, but space requirement and cost increase significantly
Solution Approach 1:
The patent merges the transformer and switchgear into a single integrated unit with direct electrical connection, eliminating the need for separate gas-insulated lines or high-voltage cables. The switchgear is positioned adjacent to the transformer with direct coupling, reducing space requirements while maintaining reliable electrical connection.
Solution Approach 2:
The patent introduces an intermediary coupling structure that directly connects the transformer and switchgear housings. This coupling structure serves as a mediator that provides both mechanical support and electrical connection, replacing the need for lengthy external connections.
2Reliability
If gas-insulated lines are used with rigid structure, then electrical connection is provided, but ability to compensate for bending stresses is poor
Solution Approach 1:
The patent employs a dynamic coupling structure that can adapt to mechanical stresses and movements. The coupling between transformer and switchgear housings is designed to be flexible yet electrically conductive, allowing compensation for bending stresses while maintaining reliable electrical connection.
3Reliability
If high-voltage cables with large bending radii are used, then electrical connection is achieved, but space requirement and complexity of cable routes increase
Solution Approach 1:
The patent extracts the electrical connection function from separate cables and integrates it directly into the coupling structure between transformer and switchgear housings. This eliminates the need for external high-voltage cables and their associated routing complexity.
4Area of stationary object
If transformer and switchgear are set up in close proximity, then space is saved, but thermal coupling may cause overheating of switchgear
Solution Approach 1:
The patent segments the housing structure into thermally independent zones. The coupling structure between transformer and switchgear housings is designed with thermal breaks or insulating elements that prevent heat transfer from the transformer to the switchgear, allowing close proximity placement without thermal coupling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design results in a cost-effective, space-saving, and stable substation with secure environmental sealing, enabling safe and efficient lifting and anchoring of the transformer and switchgear as a single unit, particularly beneficial for offshore applications.
Implementation Method 1
the housing of the switchgear is thermally decoupled from the transformer, the housing of the switchgear being spatially spaced apart from the transformer by a gap between the housing and the transformer
Data Source
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AI summary
A substation (1) is provided which comprises a transformer (10) and a switchgear (50) arranged within a housing (60) and conductively connected to the transformer (10) via an electrical connection (20), wherein the housing (60) of the switchgear (50) is connected to the transformer (10) via a flange connection (40) enclosing the electrical connection (20).