Tool and method for simulating internal heating of composite insulator

A composite insulator and internal heating technology, which is applied in microwave heating, electric heating devices, electric/magnetic/electromagnetic heating, etc., can solve the problems of local heating of insulators, reappearing thermal aging process of insulators, mechanism obstacles of rotten fracture, etc.
CN112432874APending Publication Date: 2021-03-02ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
Publication Date
2021-03-02

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Abstract

In order to simulate the heating phenomenon of a composite insulator on site as much as possible and further research the influence of high temperature on the rotten fracture of the composite insulator, the invention provides a mechanism of causing the rotten fracture of the composite insulator by high temperature so as to find effective measures for preventing the rotten fracture of the compositeinsulator. The invention provides a tool and method for simulating the internal heating of a composite insulator, and the tool comprises a silicone rubber sheath at the outer layer and a glass fiberreinforced plastic cylindrical core rod wrapped by the sheath, a tiny simulated defect is placed at the critical part of the sheath and the core rod, and the tiny simulated defect, the sheath and thecore rod form the composite insulator with the defect. A semi-ellipsoidal air gap is formed between the simulated defect and the sheath, and the length of the simulated defect is far less than that ofthe core rod; wherein the simulated defect is a high dielectric loss or conductive material, and the sheath and the core rod are made of an insulating material; and microwave heating is carried out on the simulated composite insulator sample to obtain a simulated sample of composite insulator rotting fracture caused by high temperature.
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Description

technical field

[0001] The invention relates to the field of power system safety, and more specifically relates to an appliance and a method for simulating internal heating of a composite insulator. Background technique

[0002] Composite insulators are widely used because of their excellent hydrophobic properties, light weight, and convenient transportation and installation, which play a role in protecting power systems and equipment. However, in recent years, composite insulators in operation have experienced abnormal fracture phenomena such as decay and fracture, which has caused extremely severe power grid safety accidents. Through on-site investigation, it was found that the composite insulators with decayed fractures have the following characteristics: 1) The mandrel is severely deteriorated (the macroscopic section of the mandrel is not smooth, the texture of the mandrel becomes crisp, and the shape is like decayed wood, the mandrel is pulverized, the glass fiber and ...

Claims

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