A relay protection device providing arc light protection function

Abstract

A relay protection device providing an electric arc light protection function comprises a relay protection unit, an electric arc light sensor module, an arc light probe, a current transformer, a voltage transformer, an optical fiber communication module and a breaker control module; the arc light probe is connected to the electric arc light sensor module through an optical fiber, the electric arc light sensor module is electrically connected with the relay protection unit, and light intensity detected by the arc light probe is automatically detected; the light intensity is converted into an electric signal, and then the electric signal is transmitted to the relay protection unit; the current transformer is connected with the relay protection unit, a current value of protected equipment is acquired in real time, and the current value is taken as an auxiliary criterion of electric arc light signal action detection; the voltage transformer is connected with the relay protection unit, a voltage value of the protected equipment is acquired in real time, and the voltage value is taken as an auxiliary criterion of the electric arc light signal action detection; and the optical fiber communication module is connected with the relay protection unit, an electric arc light protection action signal of the relay protection unit is transmitted to a bus line-incoming protection device in real time, and the electric arc light protection action signal is used to trip a line incoming switch in an electric arc light protection action triggering condition and cut off a bus fault.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and realizes the function of arc light protection in medium and low voltage switch cabinets. Background technique [0002] The arc light short-circuit fault of the internal busbar system of the medium and low voltage switchgear is a serious fault in the power system, which causes great harm and can cause serious accidents such as personal injury or damage to the switchgear. The severity of the arc light hazard depends on the current magnitude and the arc light cutting time when the arc light is generated. At present, most switchgears have no obvious damage during the arc burning time of 35ms, and can be put into use after the insulation resistance is checked; within 100ms During the arcing time, the equipment is less damaged and only cleaning or possibly some minor repairs are required before the switchgear is put into operation again. That is, the arc burning time...

AI Technical Summary

Problems solved by technology

Since the medium and low voltage systems are generally not equipped with fast-acting busbar protection, the arc light short circuit fault of this busbar cannot be quickly removed, resulting in the development and expansion of the accident, resulting in serious economic and property losses. Therefore, many medium and low voltage systems are now A special arc protection system is required to avoid this from happening

However, the traditional arc light system requires special equipment, which is expensive, and it is more complicated to add an arc light protection system to existing projects.

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