High Voltage Testing Device Using Pressurized Gas
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Solution Overview
Problem
High voltage testing methods using gases with high insulation properties, such as sulfur hexafluoride, pose environmental concerns due to high global warming potential, and existing alternatives complicate testing devices or require complex equipment setups.
Innovation Solution
A testing device and method involving a pressure vessel where a device to be tested is mounted and subjected to elevated atmospheric pressure, using gases with low global warming potential like nitrogen, to increase dielectric strength and perform high voltage testing without the need for complex insulation setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas with high insulation property (e.g., sulfur hexafluoride) is used for high voltage testing, then dielectric strength is improved, but global warming potential increases
Solution Approach 1:
The patent changes the physical parameter of atmospheric pressure inside the pressure vessel to increase dielectric strength. By raising the pressure from normal atmospheric pressure to a higher pressure level, the dielectric strength of the gas (whether SF6 or alternative gas) is enhanced, allowing high voltage testing without requiring SF6 or other high-GWP gases.
2Reliability
If an insulation shield is disposed in the discharge path, then discharge is suppressed, but device complexity increases
Solution Approach 1:
The patent creates an inert high-pressure atmospheric environment inside the pressure vessel that inherently suppresses discharge. By maintaining elevated pressure, the gas molecules are more densely packed, reducing the likelihood of breakdown and discharge, thereby eliminating the need for additional insulation shields or complex discharge suppression structures.
3Reliability
If testing is carried out in an insulating solution, then dielectric strength is improved, but equipment complexity increases
Solution Approach 1:
The patent replaces the chemical/liquid-based insulating solution approach with a gas-phase high-pressure atmospheric approach. Instead of using fluorocarbon solutions or other liquid insulators that require evaporation prevention equipment, drying equipment, and cleaning systems, the invention uses compressed gas at elevated pressure to achieve the same dielectric strength enhancement, thereby simplifying the equipment requirements.
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 approach allows for high voltage testing while reducing environmental burden and simplifying testing equipment, as it increases dielectric strength by raising atmospheric pressure within the testing environment, thus minimizing the risk of dielectric breakdown and discharge.
Implementation Method 1
a pressurization unit that raises the atmospheric pressure of the internal space of the pressure vessel... increases dielectric strength by raising atmospheric pressure within the testing environment
Data Source
AI summary
A testing device includes a pressure vessel, a mounting stand disposed in an internal space of the pressure vessel, on which a device to be tested is mounted, test electrodes, disposed in the internal space of the pressure vessel, that supply a test voltage to the device to be tested mounted on the mounting stand, and a pressurization unit that raises the pressure of the internal space of the pressure vessel. The test voltage is supplied from the test electrodes to the device to be tested mounted on the mounting stand, and testing of the device to be tested is carried out, in a condition that the pressure of the internal space of the pressure vessel is raised by the pressurization unit.