Arc Light Protection System

Abstract

The invention discloses an arc light protection system. An arc light protection device is connected with a current protection unit and arc light expansion units through a switch. The arc light expansion units are connected with multiple arc light sensors. The trip-out output end of the arc light protection device is connected with the high-voltage breaker and the low-voltage breaker of a first transformer, and a buscouple breaker. The current detecting end of the arc light protection device is connected with a first current sensor at the low-voltage side of the first transformer through a current line. The arc light sensing input interface of the arc light protection device is connected with the arc light sensor. The trip-out output port of the current protection unit is connected with the high-voltage breaker and the low-voltage breaker of a second transformer. The current detecting end of the arc light protection device is connected with a second current sensor at the low-voltage side of the second transformer through a current line. A first low-voltage bus is connected with a second low-voltage bus through the buscouple breaker. The arc light protection device is connected with a feed line protection unit and an operating condition monitoring unit.

Description

technical field [0001] The invention relates to the field of arc protection, in particular to an arc protection system. Background technique [0002] In the power system, busbars with a voltage level of 35kV and below are generally not equipped with busbar protection. However, due to the large number of outgoing lines on the medium and low voltage busbars, frequent operations, and the distance between the three-phase conductor lines and the earth is relatively close, it is easy to be harmed by small animals, and the quality of equipment manufacturing is worse than that of high-voltage equipment. Poor conditions, changes in system operating conditions, human and operational errors and other reasons, the failure probability of medium and low voltage buses is much higher than that of high voltage and ultra high voltage buses. But for a long time, people have not paid enough attention to the protection of medium and low voltage buses, and no advanced and reasonable solutions ha...

AI Technical Summary

Problems solved by technology

However, due to the large number of outgoing lines on the medium and low voltage busbars, frequent operations, and the distance between the three-phase conductor lines and the earth is relatively close, it is easy to be harmed by small animals, and the quality of equipment manufacturing is worse than that of high-voltage equipment. Due to poor conditions, changes in system operating conditions, human and operational errors, etc., the failure probability of medium and low voltage buses is much higher than that of high voltage and ultra high voltage buses

But for a long time, people have not paid enough attention to the protection of medium and low voltage buses, and no advanced and reasonable solutions have been found. expansion, resulting in huge economic losses

In recent years, due to various reasons, medium and low-voltage switchgears have been severely burned, and some have even developed into serious fire disasters. The accidents of main transformers damaged by external short-circuit current impacts have also increased year by year, and these distribution network accidents have been improperly handled and even enlarged. It has developed into a transmission network accident, causing significant economic losses, and has aroused widespread concern in the power sector

The reason is mostly because there is no medium and low voltage busbar protection, and the fault cannot be quickly removed.

Images