Segmented GIL Bent Conductor Assembly for Adjustable Turning Angles
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Solution Overview
Problem
Existing gas-insulated transmission lines (GIL) have complex and costly elbow units with long lead times, requiring different molds for various turning angles, which complicates manufacturing and increases costs.
Innovation Solution
A bent unit for GIL is introduced, comprising a cylindrical bent housing with adjustable connection angles and a tubular bent conductor formed from separate straight and bent sections, connected via a shield and insulator for support and electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional elbow units are used with integral casting, then structural strength is improved, but manufacturing complexity and lead time increase
Solution Approach 1:
The elbow unit is divided into multiple separate sections (first elbow section, second elbow section, third elbow section) that can be manufactured independently and then assembled. This segmentation allows each section to be produced using standard molds rather than requiring complex integral casting, reducing manufacturing complexity and lead time while maintaining structural integrity through proper connection design with flanges and bolts.
2Manufacturing precision
If different molds are developed for different turning angles, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
The elbow sections are designed with universal connection features (flanges, bolts, standardized interfaces) that allow the same basic sections to be assembled into different configurations and turning angles. This universality eliminates the need to develop separate molds for each turning angle, reducing manufacturing costs while maintaining precision through careful design of the connection interfaces that ensure accurate angular relationships.
3Reliability
If complex shaped conductor parts are used, then electrical connection reliability is improved, but device complexity and cost increase
Solution Approach 1:
The conductor is divided into separate straight conductor parts that can be independently manufactured and assembled. This segmentation simplifies the shape of individual conductor components compared to a single complex bent conductor, reducing manufacturing complexity and cost while maintaining electrical connection reliability through proper connection design at the joints using connection pieces and conductive grease.
Data Source
AI summary
A bent unit and a gas-insulated transmission line having the same are provided. The bent unit includes: a bent housing including a cylindrical first housing section and a cylindrical second housing section, the first housing section and the second housing section being connected with each other at an angle α; a tubular bent conductor arranged in the bent housing; and an insulator arranged in the bent housing to support the bent conductor. The bent conductor includes a straight conductor section and a bent conductor section which are formed separately and connected with each other. The straight conductor section extends along the first housing section. The bent conductor section extends along the first housing section and the second housing section and is bent to have the angle α.