Electrode heating device used for high-voltage testing of liquid environment

Abstract

The invention discloses an electrode heating device used for high-voltage testing of a liquid environment. The device is formed by a heating electrode (1), a high-voltage ball electrode (2), an electrode support frame (3), a high-pressure-side voltage sharing ball (4), a grounding-side voltage sharing ball (5), a high-voltage connection rod (6), a high-voltage lead wire (7), a grounding lead wire(8) and a direct-current steady-voltage power supply (9). The heating electrode (1) is connected to the direct-current steady-voltage power supply (9) through a positive lead wire (10) and a negativelead wire (11). Heating power of the heating electrode (1) is changed through changing output power of the direct-current steady-voltage power supply (9), and thus a thermal effect of a short-circuitcurrent in a case where a short-circuit fault of a power system arises is simulated. Breakdown voltage between the high-voltage ball electrode (2) and the heating electrode (1) is measured, relevant mathematical processing is carried out on breakdown voltage data, results can be used as a theoretical basis of designing of insulation distances in short-circuit faults of high-voltage power equipment, and an experiment basis is provided for perfecting liquid breakdown theory.

Description

technical field [0001] The invention relates to an electrode heating device for performing high-voltage tests in a liquid environment. Background technique [0002] Because liquid has the characteristics of high breakdown field strength and good self-recovery, it is used as an insulating medium in many high-voltage power equipment. However, due to the complex physical and chemical properties of the liquid medium itself, the breakdown model and breakdown mechanism of the liquid under high voltage are not yet mature. At present, the mainstream theory of liquid breakdown is the bubble breakdown theory of liquid insulation. After bubbles are generated in the liquid due to various reasons such as heat generation, the gas is ionized and piled up to form a "gas bridge" to cause breakdown of the liquid medium. [0003] When a short-circuit fault occurs in the power system of high-voltage power equipment working in a liquid environment, the short-circuit current increases sharply. D...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a kind of electrode heating device for liquid environment high pressure test aiming at the shortcoming that the existing electrode heating device is not suitable for high pressure test

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