Compact Gas-Insulated Switchgear Layout
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Solution Overview
Problem
Phase-separated gas-insulated switchgear requires a larger installation space due to its separate tanks for busbars, circuit breakers, and connection busbars, making transportation and assembly cumbersome, as it needs to be divided into smaller units and has a larger footprint compared to three-phase gas-insulated switchgear.
Innovation Solution
The configuration includes first to ninth circuit breakers aligned in rows with rising portions, connected by multiple busbars arranged in specific paths to reduce the overall size by optimizing the layout and reducing the lateral width of the connection busbars, allowing for more compact packaging and easier transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase-separated gas-insulated switchgear uses separate tanks for busbars, circuit breakers, and connection busbars, then reliability is improved through better isolation, but installation space increases and transportation becomes cumbersome
Solution Approach 1:
The switchgear is divided into multiple independent tank units, each containing specific components (circuit breakers, busbars, or connection busbars). This segmentation allows for modular assembly while maintaining the reliability benefits of separate containment. The connection busbars are further segmented into multiple units rather than using a single large busbar, reducing the lateral width required.
Solution Approach 2:
The patent transitions from a conventional layout to a stacked three-dimensional arrangement where tank units are vertically positioned. Connection busbars extend vertically between stacked tanks rather than horizontally, reducing the lateral footprint. This vertical stacking approach maintains component isolation while compacting the overall installation space.
2Ease of operation
If connection busbars are arranged above main busbars to raise lead-out busbars, then ease of operation is improved for transmission line connections, but device complexity increases
Solution Approach 1:
Instead of arranging connection busbars above main busbars as in conventional designs, the patent inverts this arrangement by positioning connection busbars at the same level or below main busbars in certain configurations. This inversion simplifies the structural support requirements and reduces device complexity while maintaining operational ease through proper lead-out positioning.
Solution Approach 2:
The patent merges the positioning functions of main busbars and connection busbars by allowing them to be arranged in the same horizontal plane or closely stacked vertically, eliminating the need for complex multi-level arrangements. This merging approach reduces structural complexity while maintaining ease of operation through optimized lead-out busbar positioning.
3Reliability
If three circuit breakers are connected in series between two main busbars in 1-1/2CB system, then reliability is improved for busbar accidents, but the distance between main busbars increases requiring large installation space
Solution Approach 1:
The patent reduces the lateral distance between main busbars by transitioning to a vertical arrangement where circuit breakers and connection busbars are stacked in the vertical dimension. This three-dimensional configuration maintains the 1-1/2CB series connection topology while compacting the horizontal footprint, effectively resolving the contradiction between reliability and installation space.
Data Source
AI summary
A gas-insulated switchgear includes: a plurality of circuit breakers extending along a first direction and aligned in rows along a second direction perpendicular to the first direction; one end rising portions raised from one end of the plurality of circuit breakers along a third direction perpendicular to the first direction and the second direction; other end rising portions raised from another end of the plurality of circuit breakers along the third direction; and a plurality of connection busbars connecting the other end rising portions together or connecting the one end rising portions together. Two lines through which the connection busbars pass are set between the one end rising portions and the other end rising portions.