An electrode heating device for high pressure test in liquid environment

Abstract

An electrode heating device for a high-voltage test in a liquid environment, comprising a heating electrode (1), a high-voltage ball electrode (2), an electrode support (3), a high-voltage side pressure-equalizing ball (4), and a ground-side pressure-equalizing ball (5) , a high-voltage connecting rod (6), a high-voltage lead (7), a ground lead (8) and a DC stabilized power supply (9). The heating electrode (1) is connected to the DC stabilized power supply (9) through the positive lead (10) and the negative lead (11), and by changing the output power of the DC stabilized power supply (9), the heating power of the heating electrode (1) is changed, so as to This simulates the thermal effect of short-circuit currents in the event of a short-circuit fault in a power system. Measure the breakdown voltage between the high-voltage ball electrode (2) and the heating electrode (1), and perform relevant mathematical processing on the breakdown voltage data, which can be used as a theoretical basis for the design of insulation distances in the event of a short-circuit fault of high-voltage power equipment, and is useful for improving liquid breakdown. Theory provides the basis for experimentation.

Description

technical field [0001] The invention relates to an electrode heating device for carrying out high-voltage tests in a liquid environment. Background technique [0002] Because liquid has the characteristics of high breakdown field strength and good self-recovery property, liquid 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 the bubbles are generated in the liquid due to various reasons such as heat, the gas ionizes and accumulates into a "small gas bridge" to cause the liquid medium to break down. [0003] In the case of a short-circuit fault in the power system of high-voltage power equipment working in a liquid environment, the short-circuit current incre...

AI Technical Summary

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

Images