Zero value detection system for insulator string

Abstract

The invention discloses a zero-value detection system for an insulating string, and the system comprises an insulating rod, the upper end of the insulating rod is connected with a pedestal through a rotating part, the pedestal is fixedly provided with a fixed column, the interior of the fixed column is fixedly provided with a voltage conversion module, and the outer side wall of the fixed column is fixedly connected with two first conductive sheets. According to the invention, the insulating rod is pulled, so that the guide sliding plate slides on the insulating string, zero value detection is carried out on each single insulator one by one, the detection accuracy is improved, the detection accuracy is improved, and the detection accuracy is improved. When the guide slide plate slides from one end of the insulator string to the other end, the detection pin can detect each single insulator on the insulator string, so that the zero value detection work of the insulator string is completed, missing detection of individual single insulators is avoided, and safe operation of a power grid is facilitated.

Description

technical field [0001] The invention relates to the technical field of zero value detection of insulating strings, in particular to a zero value detection system of insulating strings. Background technique [0002] Under the action of long-term machine and electric load, especially with the climatic effects of wind, frost, snow and rain, some insulating strings will deteriorate to a certain extent, even zero value. The occurrence of this situation will make the rated phase voltage. Share the two ends of the remaining intact insulated strings in the same string, which will cause the following consequences: [0003] 1. The electric field strength at both ends of the other insulation strings of the string increases, which reduces the insulation performance of the line in the face of operating overvoltage and lightning overvoltage; [0004] 2. It will accelerate the aging speed of the remaining porcelain insulating strings, reduce the service life of the intact insulating strin...

AI Technical Summary

Problems solved by technology

[0003] 1. The electric field intensity at both ends of the other insulating strings in the string increases, which reduces the insulation performance of the line in the face of operating overvoltage and lightning overvoltage;

[0004] 2. It will accelerate the aging speed of the remaining porcelain insulating strings, reduce the service life of the intact insulating strings, reduce the operating life of the line, and reduce the reliability of the line operation under special weather conditions;

[0005] 3. The zero-value insulating strings reduce the creepage distance of the strings, which increases the possibility of discharge along the surface of the insulating strings in rainy days, posing a potential threat to the safe operation of the line;

[0006] Therefore, it is necessary to conduct zero-value tests on the insulating stringers regularly, so that low-value and zero-value insulating stringers can be found in time and replaced to ensure the safe and stable operation of the line. At present, once the insulating stringers used on the transmission line in the power system are broken down It will lose the insulation performance (commonly known as "zero value"). In order to ensure the safe operation of the transmission line, the failed insulation string should be replaced in time. How to quickly and accurately distinguish the failed insulation string is one of the difficult problems in the maintenance of transmission lines. Workers are required to lift the detection instrument to a place close to the insulating string through the insulating rod, and then place the two probes of the detection instrument in the grooves on both sides of each single-piece insulator in order to detect the single-piece insulators one by one. The distance from the insulation string is relatively long, and the density of the monolithic insulators on the insulation string is relatively large, which is easy to dazzle the workers, and individual monolithic insulators may be missed, leaving potential hidden dangers to the safe operation of the power grid; the application number is CN201510734501.7 The Chinese patent "On-line detection method and device for insulator string defects in direct current transmission engineering" specifically discloses that the two contact feet of the insulator string climbing robot are respectively connected to the insulating fittings of the insulator to be tested and the insulating fittings of the insulator at the rear end. The feedback signal is collected through the insulating fittings of the insulator at the back end, and compared with the standard signal to judge the state of the insulator

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