Vehicle-Mounted Transformer With Rotatable SF6 Bushing
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Solution Overview
Problem
The transportation of large-capacity oil immersed transformers is limited by their dimensions, exceeding road transportation requirements, leading to high costs and risks due to non-compliance with traffic regulations.
Innovation Solution
A vehicle-mounted mobile transformer with a position-adjustable high-voltage lead-out bushing, comprising an oil-SF6 gas bushing, an SF6 gas-air bushing, and a connecting device, allowing the SF6 gas-air bushing to rotate up to 360° for adjustable positioning, facilitating transportation while maintaining electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transformer uses a composite bushing for an outgoing line, then the electrical insulation distance is improved, but the transportation dimension exceeds the regulated width and height limits
Solution Approach 1:
The bushing is divided into multiple segments: a fixed lower bushing portion and a rotatable upper bushing portion. This segmentation allows the upper portion to be rotated into a compact position during transportation, reducing the overall dimension while maintaining the complete bushing structure for electrical insulation during operation.
Solution Approach 2:
The bushing structure transitions from a static design to a dynamic one with a rotatable upper portion. This dynamic capability enables the bushing to adapt its configuration - extending for electrical insulation during operation and retracting to a compact form for transportation, thus resolving the contradiction between insulation distance and transportation dimension.
2Device complexity
If the oil-gas bushing is adopted for direct connection, then the device complexity is reduced, but the requirements on relative positions become extremely strict and cause over length and oversized turning radius
Solution Approach 1:
The rotatable upper bushing portion provides dynamic positioning capability, allowing the bushing to be oriented in different directions. This flexibility eliminates the need for strict relative position requirements during connection while maintaining a relatively simple overall structure, thus resolving the contradiction between device complexity and ease of operation.
3Manufacturing precision
If the high-voltage bushing base and high-voltage bushing are designed with fixed dimensions, then the manufacturing precision is improved, but the adaptability to different transportation requirements is reduced
Solution Approach 1:
The bushing is segmented into a fixed lower portion and a rotatable upper portion. The fixed portion maintains manufacturing precision for proper installation and electrical connection, while the rotatable portion provides adaptability for different transportation configurations, thus resolving the contradiction between manufacturing precision and transportation flexibility.
Solution Approach 2:
The bushing structure incorporates a dynamic rotatable portion that maintains precise manufacturing tolerances while enabling adaptability to different transportation requirements. This dynamic capability allows the same precisely-manufactured component to serve multiple transportation scenarios.
Data Source
AI summary
The present invention belongs to the technical field of mobile transformer substation, and in particular relates to a vehicle-mounted mobile transformer with a position-adjustable lead-out bushing. In view of the shortage that, when the existing conventional transformer is applied to a vehicle-mounted mobile transformer substation, the transportation dimension exceeds the regulated width, height and limit, the present invention adopts the following technical solution: a vehicle-mounted mobile transformer with a position-adjustable lead-out bushing, comprising: a transformer body; and a high-voltage lead-out bushing, the high-voltage lead-out bushing comprising an oil-SF6 gas bushing, an SF6 gas-air bushing and a connecting device, the oil-SF6 gas bushing being mounted on a high-voltage bushing base, the connecting device being mounted on the oil-SF6 gas bushing, the SF6 gas-air bushing being mounted on the connecting device, and the SF6 gas-air bushing being rotatable relative to the connecting device such that the position of the SF6 gas-air bushing is adjustable. The present invention has the beneficial effects that the SF6 gas-air bushing is rotatable, the position is adjustable and thus the transportation requirement of high-voltage (such as 220 kV) equipment is met.