Method for processing end part of high-voltage device

Abstract

The invention discloses a method for processing the end part of a high-voltage device. The end part of the 6kV-1000kV high-voltage device adopts multiple screens and multiple points to sense and release the electric field of the end part with a grounding screen, and 1-10000 screens to the tail screen and the grounding screen are grounded in a sensing manner simultaneously, so that the electric field of the end part of the high-voltage device is very low; and stains exist on the surface of the end part of the high-voltage device, so that the flashover and explosion can be avoided after the high-voltage device is wetted, and the high-voltage device realizes operation without maintenance.

Description

technical field [0001] The high-voltage device end treatment method of the present invention is suitable for high-voltage 6kV to 1000kV wall bushings, circuit breaker bushings, combined electrical bushings, transformer bushings, current transformer bushings, U-shaped bushings, and cable terminals. It is used in high-voltage devices such as joints, cable intermediate heads, and busbars. It will not break down or flashover when the operating voltage is greater than the rated operating voltage and test voltage, and realize maintenance-free operation. Background technique [0002] 1. The defect of the existing high-voltage cable head: Although the surface of the cable head end is treated with a stress cone, since the end of the cable head and the stress cone are grounded inductively, the electric field at the end is released locally at a single point, but the potential at the end of the cable head is still Very high, there is dirt on the surface of the cable head, and it is easy...

AI Technical Summary

Problems solved by technology

[0002] 1. The defect of the existing high-voltage cable head: Although the surface of the cable head end is treated with a stress cone, because the end of the cable head and the stress cone are grounded inductively, the electric field at the end is released locally at a single point, but the potential at the end of the cable head is still Very high, there is dirt on the surface of the cable head, and it is easy to cause a flashover explosion after being damp

[0003] 2. The existing high-voltage bushing manufacturing technology adopts the capacitor core structure. Its defect: from the zero screen, 1 screen to the last screen on the conductor to the grounding screen induction grounding, only the upper layer and the lower layer point-to-point local release of the bushing end In fact, only the end screen and the grounding screen are directly grounded by induction, but the potential at the end of the bushing is still high, and there is dirt on the surface of the bushing. After being damp, it is easy to cause a flashover explosion

[0004] 3. Another existing manufacturing method of the cable head has its defects: 1 screen to the last screen to the grounding screen is grounded by induction, and only the electric field at the end of the cable head is released locally from point to point. In fact, only the last screen and the grounding screen are directly grounded by induction, but The potential at the end of the cable head is still very high, and there is dirt on the surface of the cable head. After being exposed to moisture, it is easy to cause a flashover explosion, similar to the following: Patent No. 98218242.2 A new type of high-voltage cable terminal; Patent No. 99248192.9 A short dry-type cable terminal Head; Patent No. 00264710.9 dry type cable terminal head

[0005] 4. The defect of the capacitive main insulation core of the existing current transformer original winding: 1 screen to the last screen to the grounding screen for induction grounding, only the electric field at the end of the transformer is released locally from point to point, and actually only the last screen and the grounding screen are directly sensed Grounded, but the potential at the end of the transformer is still very high. There is dirt on the surface of the transformer. After being damp, it is easy to cause a flashover explosion. It is similar to the following: Application No. 03100143.2 Dry-type high-voltage capacitor core and its manufacturing method

[0006] 5. The defect of the existing high-voltage terminal: 1 screen to the last screen to the grounding screen is grounded by induction, but the electric field at the high-voltage end is released locally from point to point. In fact, only the end screen and the grounding screen are directly grounded by induction, but the potential at the end is still Very high, there is dirt on the surface of the high-voltage terminal, and it is easy to cause a flashover explosion after being damp, similar to the following: Patent No. 201010116122.9 High-voltage terminal

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