Single-recoil arc extinguishing device and method

Abstract

The invention discloses a single-recoil arc extinguishing device and method, and belongs to the technical field of arc extinguishing. The device comprises a supporting body, a recoil tube, a skirt edge and a recoil electrode, wherein the top end of the recoil tube is open, the bottom of the recoil tube is closed, the recoil electrode is arranged at the bottom of the recoil tube, and the skirt edgeis arranged on the outer side of the supporting body. According to the invention, the safety capability of a lightning protection device can be improved due to the fact that the lightning protectiondevice is achieved by blocking arc injection. The safety capability of the power system is improved; and the improvement of the arc extinguishing capability of the device reduces the probability of short circuit of the power system, all flashover points can be effectively terminated before various natural disturbances, the flashover points are eliminated before malignant abrupt changes occur in the power system, and the cost performance of lightning protection is improved.

Description

technical field [0001] The invention relates to the technical field of arc extinguishing, in particular to a single recoil arc extinguishing device and method. Background technique [0002] Lightning strikes can cause different forms of damage and destruction to power facilities. Thundercloud discharge can cause lightning strike overvoltage in the power system, which can be divided into direct lightning strike overvoltage and induced lightning strike overvoltage. Lightning overvoltage may cause damage to insulators and transmission lines; the impact flashover caused by lightning strikes on transmission lines will cause flashover of line insulators, and then generate a large power frequency continuous current, damage insulator strings and fittings, and cause line accidents; Electric shock on the transmission line or lightning protection line may cause broken strands or even rupture, making the power transmission work impossible. [0003] The existing "guiding type" lightning...

AI Technical Summary

Problems solved by technology

Lightning overvoltage may cause damage to insulators and transmission lines; the impact flashover caused by lightning strikes on transmission lines will cause flashover of line insulators, and then generate a large power frequency continuous current, damage insulator strings and fittings, and cause line accidents; Electric shock on the transmission line or lightning protection line may cause broken strands or even rupture, making the power transmission work impossible

[0003] The existing "drainage type" lightning protection mode is mainly to install parallel protective gaps at both ends of the insulator (string), which has a simple structure and is easy to install, but because it does not have an arc-extinguishing function module, the short-circuit current continues to flow into the system, which can only Relying on the circuit breaker to cut off the short-circuit current and exchanging the "tripping rate for the accident rate" will increase the lightning tripping rate to a certain extent, which will easily cause huge safety accidents on the line

At the same time, due to the ablation effect of the short-circuit current, the insulation coordination of the parallel protection gap fails, and the application function is lost

[0004] Most of the electric fields in the existing active arc extinguishing parallel gaps are extremely uneven electric fields, and their volt-second characteristics are very steep, which makes it difficult to achieve a good match with the volt-second characteristics of the protected insulation

In traditional insulation coordination, if the insulation ratio is further reduced, that is, the distance of the parallel gap is shortened, the static breakdown voltage of the parallel gap will be set too low. Frequent action under voltage

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