Thermoelectric insulating medium fault simulation device

Abstract

A thermoelectric insulating medium fault simulation device comprises a sealed container, a self-heating electrode module, a high-voltage electrode, a high-voltage wall bushing, a low-voltage wall bushing, a sample inlet, a sampling port, a discharge detection device, a temperature controller, a heating power source, a plate penetrating flange, an electric heating rod, a pressure detector, a microwater detector, a discharge signal sensor, a first temperature sensor and a second temperature sensor. In operation, simulation of three types of thermoelectric complex faults can be realized throughthe temperature controller and includes simulation of thermoelectric complex faults with different thermoelectric positions, simulation of thermoelectric complex faults with same thermoelectric positions and simulation of thermoelectric complex faults under high-temperature and discharge complex action.

Description

technical field [0001] The invention relates to an insulating medium fault simulation device. Background technique [0002] SF6 gas is widely used in electrical equipment such as circuit breakers, transformers, bushings, SF6 gas insulated switchgear (GIS) due to its excellent insulation and arc extinguishing properties. At present, my country's 220kV and above ultra-high voltage power grids and UHV power grids have been mandated to use all SF6 switchgear, and its holdings are more than 33,000 compartments, ranking first in the world. In addition, equipment such as SF6 gas insulated pipeline bus (Gas Insulated Line, GIL) is also the preferred transmission method for key places such as nuclear power, hydropower and cross-river transmission pipelines. [0003] SF6 gas is chemically stable, but it will dissociate under discharge or overheating conditions; when there are no other impurities, the dissociated SF6 will quickly recombine and reduce to SF6 gas. However, in actual us...

AI Technical Summary

Problems solved by technology

There are two problems in this simulation method. One is that the insulating material used in the sealed box of the discharge simulation device has limited temperature resistance, which makes it impossible to simulate a high overheating temperature; the other is that the simulated fault does not match the actual operation of the equipment. The temperature of the entire discharge simulation device is approximately equal, but the temperature distribution of the equipment in actual operation is uneven and there is a large temperature difference

In addition, there is no thermal-electrical composite simulation device for gas-insulated media.

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