A real-time distributed monitoring system

Abstract

The invention discloses an arc light protection on-line monitoring method. An arc light protection device performs real-time arc light detection of a first transformer through arc light sensors for detecting that whether arc light exists, and timely monitors a current signal of the first transformer through a first current sensor for detecting current increment. If the arc light or current abnormity is detected, rectification, filtering and threshold comparison are performed, and after an abnormity alarm is confirmed, the arc light protection device disconnects a high voltage side breaker or a low voltage side breaker of the first transformer. A current protection unit performs real-time arc light detection of a second transformer through arc light sensors for detecting that whether arc light exists, and timely monitors a current signal of the second transformer through a second current sensor for detecting current increment. If the arc light or current abnormity is detected, rectification, filtering and threshold comparison are performed, and after an abnormity alarm is confirmed, the arc light protection device disconnects a high voltage side breaker or a low voltage side breaker of the second transformer.

Description

technical field [0001] The invention relates to the field of arc protection, in particular to a real-time distributed monitoring 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 reason...

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.

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