Adjustable Impedance Simulation for High-Frequency GIL/GIS Partial Discharge
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Solution Overview
Problem
Existing test sections for GILs/GISs are limited in size, making it difficult to simulate high-frequency current signals of partial discharge in long-distance systems, and using large-sized sections is costly.
Innovation Solution
A device comprising a casing, busbar cavity, adjustable impedors, metal supports, and high-frequency current sensors is used to simulate high-frequency current propagation, mimicking the impedance of long-distance GIL/GIS by connecting adjustable resistors and inductors in series between metal supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large-sized and long-distance test section is used to simulate high-frequency current propagation, then the simulation accuracy is improved, but the cost increases
Solution Approach 1:
The patent uses an adjustable impedor to create an electrical impedance copy of a long-distance GIL/GIS housing. Instead of using an actual long-distance physical test section, the invention synthesizes the electrical characteristics (impedance) of the long-distance system through adjustable resistance and inductance components, achieving accurate simulation at reduced cost
Solution Approach 2:
The patent employs adjustable resistors and inductors that can be tuned to match the impedance parameters of long-distance GIL/GIS systems. By changing the electrical parameters (resistance and inductance values) of the impedor, the system can simulate different lengths and conditions of actual GIL/GIS, enabling flexible and accurate simulation without physical scaling
2Measurement precision
If a large-sized and long-distance test section is used to simulate high-frequency current propagation, then the simulation accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the essential electrical characteristic (impedance) from the complex physical system of long-distance GIL/GIS housing. By isolating and reproducing only the critical impedance parameter through a simplified circuit of resistors and inductors, the invention eliminates the need for complex large-scale physical test sections while maintaining simulation accuracy
3Device complexity
If a limited-size test section is used, then the device complexity is reduced, but the simulation accuracy deteriorates
Solution Approach 1:
The patent compensates for the limited physical size of the test section by introducing adjustable electrical parameters through the impedor. The adjustable resistance and inductance values allow the compact physical setup to electrically simulate the impedance characteristics of much longer actual GIL/GIS systems, achieving high simulation accuracy despite simple device structure
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
The device allows for efficient simulation of high-frequency current propagation in long-distance GIL/GIS systems with reduced time and cost, providing accurate propagation characteristics.
Implementation Method 1
the adjustable impedor is connected in series to the metal supports at the grounding points to obtain an impedance equivalent to that of a long-distance GIL/GIS housing
Implementation Method 2
the adjustable impedor is formed by an adjustable resistor and an adjustable inductor which are connected in series
Implementation Method 3
a high-frequency current sensor is disposed around the wire
Data Source
AI summary
A device for simulating high-frequency current propagation of partial discharge of a GIL/GIS is disclosed. The device comprises a casing, a busbar cavity, an adjustable impedor, a first metal support, a second metal support, a third metal support, and a high-frequency current sensor. The first metal support and the second metal support are separated by an insulating support, the third metal support has an end connected to the second metal support, as well as an end connected to a grounding grid, and the adjustable impedor is formed by an adjustable resistor and an adjustable inductor which are connected in series, and is connected in series between the first metal support and the second metal support through a wire. In the application, the adjustable impedor is connected in series to the metal supports at the grounding point to obtain an impedance equivalent to that of a long-distance GIL/GIS housing.