Unlock instant, AI-driven research and patent intelligence for your innovation.

Test method for temporary overvoltage limit withstand characteristic of DC transfer switch arrester

A technology of direct current conversion and characteristic testing, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve problems such as insufficiency, and achieve the effect of improving operational reliability

Active Publication Date: 2021-11-16
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
View PDF19 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the power frequency overvoltage withstand test method stipulated in the existing arrester standard is insufficient, the present invention provides a test method for the temporary overvoltage limit withstand characteristic of a DC transfer switch arrester

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Test method for temporary overvoltage limit withstand characteristic of DC transfer switch arrester
  • Test method for temporary overvoltage limit withstand characteristic of DC transfer switch arrester
  • Test method for temporary overvoltage limit withstand characteristic of DC transfer switch arrester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] The test method for the temporary overvoltage limit withstand characteristic of the DC transfer switch arrester mainly includes the initial value measurement step, the temporary overvoltage withstand test step and the test judgment step. This method obtains the DC transfer switch arrester under the actual wavelength Limit the multiple of temporary overvoltage, optimize the configuration of arresters, and ensure that the arresters of DC conversion switches in different projects can operate reliably under temporary overvoltage. Such as figure 1 As shown, the method specifically includes the following steps:

[0025] Initial value measurement steps: select 20 new valve pieces as test samples, measure the DC 1mA reference voltage of all valve pieces, the leakage current under 0.75 times the reference voltage and the residu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for testing the temporary overvoltage limit tolerance characteristic of a lightning arrester for a direct current conversion switch, which mainly includes an initial value measurement step, a temporary overvoltage tolerance test step and a test judgment step. The temporary overvoltage limit withstand test method proposed by the present invention can obtain accurate overvoltage withstand tests by performing multiple temporary overvoltage withstand tests under test waveforms of different wavelengths, and adjusting the transient overvoltage multiples according to different test results. The temporary overvoltage limit withstand multiple of the DC converter arrester can provide a configuration basis for the design of the DC converter arrester and improve the operational reliability of the arrester in the DC system conversion process.

Description

technical field [0001] The patent of the present invention relates to high-voltage maintenance equipment, in particular to a test method for temporary overvoltage limit tolerance characteristics of lightning arresters for DC conversion switches. Background technique [0002] During the bipolar operation of the DC system, if a single-pole lockout occurs, the sound pole will form a single-pole ground loop through the grounding pole and the ground loop. At this time, thousands of amperes of DC current will be injected into the grounding pole, which will affect the surrounding transformers and oil and gas pipelines. safe operation. In order to reduce the running time of the single-pole ground return line, it should be converted to the single-pole metal return line operation as soon as possible; after the fault is eliminated, the single-pole metal should be converted to the earth return line before the unlocking procedure of the outage pole valve group can be executed and the out...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1236
Inventor 卢文浩韦晓星楚金伟
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID