Experiment model device of oiled-paper condenser bushing

Abstract

The invention relates to an experiment model device of an oiled-paper condenser bushing. The portions, located at the top end of an upper insulator and the tail end of a lower insulator, of a conducting rod are each sleeved with a pressing ring and a nut; when the nuts at the upper end and the lower end are fastened, a sealed cavity can be formed by a gap among a condenser core, the upper insulator, a flange and the lower insulator; a sensor installation base for installing a sensor is arranged on the cylindrical side wall of the flange, and a vacuumizing valve port and an oil injection valve port which are communicated with the cavity are formed in a step of the flange in a spaced mode; an oil window communicated with the cavity is further formed in the cylindrical side wall of the flange. According to the experiment model device, the size of the bushing is reduced compared with a true bushing, main structures of the true bushing are provided, the assemblies are made of materials completely the same as materials of the true bushing, and the experiment model device can be used for performing multiple dielectric response experiments of the condenser core under different conditions such as wetting and aging.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation, in particular to an oil-paper capacitive bushing experimental model device, and also relates to an application method of the model device. Background technique [0002] The capacitive equipment in the substation accounts for about 40% to 50% of the total power equipment, and the most critical and most prone to failure capacitive equipment is the transformer bushing. The insulation performance of transformer bushings should be able to withstand the severe test of electricity, force, heat and their combined effects for a long time. It should have the characteristics of small size, light weight, strong versatility, good sealing performance and easy maintenance and repair. According to statistics, bushing faults account for about 30% of the total transformer faults, especially the inner insulation capacitor core of the bushing. The insulation failure of the capacitor cor...

AI Technical Summary

Problems solved by technology

However, the dielectric response of the real bushing is related to the dielectric response of the capacitor core oil-paper material itself and the geometric structure of the bushing insulation system. The oil-impregnated cardboard cannot reflect the geometric structure characteristics of the bushing insulation. Therefore, there is a large difference between the dielectric response measurement results of the oil-paper sample and the real bushing, and the use of the sample results to diagnose the insulation condition of the real bushing has great limitations

On the other hand, if the real bushing is directly used for the dielectric response experiment, the real bushing is bulky and heavy, and there are problems in the experimental operation, difficult to control the experimental conditions accurately, and inaccurate quantification of the influencing factors. Therefore, the reliability of the experimental results is also a big problem

Images