Pluggable Socket Field Control for Uniform Electric Stress
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Solution Overview
Problem
Existing pluggable bushing installations in transformers and switchgear require complex on-site operations and face high risks of dielectric failure due to inhomogeneous electric stress distribution, necessitating separate manufacturing processes for sockets and plug-in devices.
Innovation Solution
A socket design with a field control unit featuring at least three conductive layers around a current conduction path, separated by insulating material, to uniformly distribute electric stress and enhance dielectric performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pluggable bushing solution is implemented, then installation complexity and on-site operations are reduced, but dielectric failure risk increases due to inhomogeneous electric stress distribution
Solution Approach 1:
The patent applies parameter changes by introducing a field control unit with multiple conductive layers that actively modify the electric stress distribution parameters. The conductive layers are positioned at specific distances from the current conduction path to create a controlled capacitive effect, transforming the inhomogeneous electric field into a more uniform distribution, thereby reducing dielectric failure risk while maintaining the pluggable configuration
Solution Approach 2:
The field control unit acts as an intermediary element between the current conduction path and the surrounding dielectric medium. This intermediary structure with its layered conductive arrangement mediates the electric field distribution, preventing direct concentration of stress at the plug-socket interface, thus enhancing reliability without compromising the pluggable installation advantage
2Reliability
If fine-graded bushings with condenser core are used, then device size is reduced and reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The field control unit is segmented into multiple discrete conductive layers separated by insulating material. This segmentation allows each layer to be independently positioned and connected to specific potential points, simplifying the manufacturing process compared to a monolithic condenser core while achieving the same electric field control function and improving dielectric performance
3Reliability
If interface length is increased to maintain electric stress within design rules, then dielectric performance is improved, but device size increases
Solution Approach 1:
Instead of extending the interface length in one dimension, the patent introduces a multi-layered structure in the radial dimension. The conductive layers are arranged at different radial distances from the current conduction path, creating a three-dimensional field control mechanism that achieves uniform stress distribution without increasing the axial length of the interface, thus maintaining compact device size while improving dielectric performance
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 reduces dielectric failure risk, improves reliability and safety, allows for compact and efficient production, and facilitates easier installation by using uniform electric stress distribution and compatible manufacturing processes for sockets and plug-in devices.
Implementation Method 1
a field control unit including a layer arrangement with at least three conductive layers arranged around a current conduction path of the plug-in device
Implementation Method 2
fine-graded bushings, also known as capacitance-graded bushings... include a condenser core
Data Source
AI summary
A socket, connectable to a plug-in device, wherein the plug-in device is a bushing and/or a plug-in cable termination, is described. The socket includes a current conduction path and a field control unit. The field control unit includes a layer arrangement with at least three conductive layers arranged around the current conduction path and separated by an insulating material.