Oil-Immersed Transformer Layout for Higher Capacity in Container Stations
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Solution Overview
Problem
The capacity of oil-immersed transformers in prefabricated transformer stations is limited by the size of the 20-foot marine container, as increased capacity leads to larger iron cores and heat dissipation areas, requiring additional space and heat dissipators, which complicates installation and transportation.
Innovation Solution
The oil conservator is installed above the fuel tank with a height higher than the transformer room's side wall, allowing more space for the fuel tank and transformer, and connected via a pipe with a gas relay for fault protection, enabling capacity expansion without increasing the container's height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the capacity of the oil-immersed transformer is increased, then the transformer capacity is improved, but the size of the fuel tank and transformer increases, requiring additional space and heat dissipators
Solution Approach 1:
The oil conservator is positioned above the transformer room with its top extending higher than the container housing height, utilizing the vertical dimension outside the container boundaries. This allows the fuel tank capacity to increase without increasing the container's footprint or standard dimensions, resolving the contradiction between transformer capacity and container volume constraints
Solution Approach 2:
The oil conservator is nested above the transformer room structure, with the conservator's bottom positioned above the transformer room top. This nested arrangement integrates the expanded fuel storage within the existing container structure's vertical envelope, allowing increased transformer capacity while maintaining container size specifications
2Power
If the capacity of the oil-immersed transformer is increased, then the transformer capacity is improved, but the heat dissipation area increases, requiring additional heat dissipators and space occupation
Solution Approach 1:
By extending the oil conservator vertically above the container housing, the heat dissipation surface area is increased in the vertical dimension rather than requiring additional horizontal space. This allows higher transformer capacity with adequate heat dissipation without adding more heat dissipators within the container footprint
3Ease of manufacture
If the container size specification is maintained, then transportation and installation are simplified, but the transformer capacity is limited
Solution Approach 1:
The oil conservator extends above the container housing in the vertical dimension, allowing increased transformer capacity while maintaining the container's standard horizontal dimensions. This ensures the container can still be transported and installed using standard procedures while accommodating higher power ratings
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 configuration increases the capacity of the oil-immersed transformer without altering the container's size, simplifying transportation and installation, and reduces the number of transformer stations needed for photovoltaic systems, lowering construction and maintenance costs.
Implementation Method 1
the transformer oil serves as a refrigerating medium and an insulating medium
Implementation Method 2
a gas relay is disposed on the pipe. The gas relay is configured to: when an internal fault occurs in the oil-immersed transformer, generate an alarm or cut off the oil-immersed transformer
Data Source
AI summary
A prefabricated transformer station, an oil-immersed transformer, and a photovoltaic system, and relates to the field of power distribution technologies. The prefabricated transformer station includes a container housing and the oil-immersed transformer. A transformer room is provided inside the container housing, and a top cover of the transformer room is opened. The oil-immersed transformer is installed in the transformer room, and a height of a top of an oil conservator of the oil-immersed transformer is higher than a height of a side wall of the transformer room. The prefabricated transformer station can provide more space for a fuel tank, so as to improve a capacity of the oil-immersed transformer.