A device and method for testing partial discharge characteristics

Abstract

The invention provides a device and method for testing the partial discharging characteristic. The device for testing the partial discharging characteristic comprises a concentric positioning nut, an outer cover and a base, wherein the concentric positioning nut and the base are arranged at the upper end of the outer cover and the lower end of the outer cover respectively to form a sealed cavity, central through holes are vertically formed in the center of the concentric positioning nut and in the center of the base respectively, a high-voltage guide rod and a grounding guide rod are arranged in the central through hole of the concentric positioning nut and the central through hole of the base respectively, and a top electrode and a bottom electrode are arranged on the end portions, located in the sealed cavity, of the high-voltage guide rod and the grounding guide rod respectively. The device for testing the partial discharging characteristic is characterized in that a through hole parallel to the central through hole of the concentric positioning nut is formed in the concentric positioning nut, a connecting rod is arranged in the through hole, and a supporting ring is horizontally arranged on the end portion, located in the sealed cavity, of the connecting rod. Compared with the prior art, the device and method for testing the partial discharging characteristic have the advantages that the structure is simple, disassembly and assembly are easy to achieve, and the effect of insulating oil and paper oil insulating material testing is good.

Description

technical field [0001] The invention relates to a device for testing partial discharge characteristics, in particular to a device and a testing method for testing partial discharge characteristics of insulating oil and oil-paper insulating materials. Background technique [0002] The characteristic of insulating oil to prevent or suppress partial discharge is very important in many applications, and the operating characteristics in different chemical structure liquids vary greatly. The partial discharge of oil-paper composite insulation materials is more complicated. The different relative positions of the discharge points have a great influence on the partial discharge performance, so a device for testing the partial discharge performance of insulating oil and oil-paper composite materials is needed. [0003] The following devices are disclosed in the prior art: [0004] A utility model named "An Oil Cup for Research on the Impact Characteristics of Insulating Oil" with th...

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Problems solved by technology

[0008] 1. It is impossible to test the partial discharge characteristics when the insulating material is placed between the upper and lower electrodes and does not touch the upper and lower electrodes;

[0009] 2. It is impossible to test the partial discharge characteristics when there is any suspended metal discharge in the oil;

[0010] 3. figure 2 and image 3 It is difficult to disassemble the connection between the plexiglass cover of the oil cup container and the base, and the concentric positioning nut;

[0011] 4. figure 2 and image 3 It is difficult to replace the insulating material placed on the lower electrode, and the plexiglass cover and base need to be disassembled, and the existence of the plexiglass cylinder has great limitations on the placement of insulating materials;

[0012] 5. Figure 4 Taking into account the characteristics of oil-paper insulation, the oil consumption is large, and it is impossible to test samples with a small amount of oil. In addition, the scale of oil change is large, which is not suitable for the situation where only partial discharge characteristics need to be tested, and it is not suitable for comparison of various transformer oils. test

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