A multi-level arc fault disconnection system

Abstract

The invention discloses a multi-level arc fault disconnection system comprising AFCI systems, arc fault intelligent algorithm analysis systems and arc fault intelligent interaction systems arranged atdifferent levels and branches, and each AFCI system comprises a multi-dimensional arc fault information detection and integration system, an arc fault intelligent primary analysis system and an arc fault circuit breaker. The multi-dimensional arc fault information detection and integration system performs multi-dimensional real-time monitoring on a user end, and the arc fault intelligent primaryanalysis system analyzes the monitored information. The arc fault intelligent algorithm analysis system analyzes abnormal signals, and the arc fault intelligent interaction system issues control commands to the arc fault circuit breaker. The present invention provides the multi-level arc fault disconnection system. The system can improve the accuracy and operational reliability of the ACFI system,and realize the selective coordination of the multi-level arc fault disconnection system to achieve the purpose of accurate power supply interruption.

Description

technical field [0001] The invention belongs to the electrical field, and in particular relates to a multi-level arc fault circuit breaking system. Background technique [0002] Electrical fires have become a huge hidden danger of personal safety and property loss. According to the statistics of "China Fire Statistical Yearbook", the annual fires caused by electrical reasons account for 30.7% of the total number of fires in the country. At the low-voltage user end of the power system, parallel arc and grounding The loop current of the arc is generally greater than 75A, and the existing protective short circuit has the ability to isolate and protect; and the series arc fault, which is the main cause of electrical fires, is limited by the line load, the fault current is small, and the effective value of the loop current It is often similar to the effective value of the normal working circuit current of the load, which is between 5 and 30A. Traditional protection methods cannot...

AI Technical Summary

Problems solved by technology

[0002] Electrical fires have become a huge hidden danger of personal safety and property loss. According to the statistics of "China Fire Statistical Yearbook", the annual fires caused by electrical reasons account for 30.7% of the total number of fires in the country. At the low-voltage user end of the power system, parallel arc and grounding The loop current of the arc is generally greater than 75A, and the existing protective short circuit has the ability to isolate and protect; and the series arc fault, which is the main cause of electrical fires, is limited by the line load, the fault current is small, and the effective value of the loop current It is often similar to the effective value of the normal working circuit current of the load, which is between 5 and 30A. Traditional protection methods cannot effectively realize the isolation protection of series arc faults, which may cause electrical fire accidents. Therefore, the detection and diagnosis of series arc faults are of great importance The safe operation of electrical equipment is particularly important. However, in the existing technology, when an arc fault occurs in any part of the system, although it can finally achieve the function of reliably isolating the fault, it may cause power outage in non-faulty areas, which cannot achieve better Selectivity, in order to solve the above problems, the present invention provides a multi-level arc fault circuit breaker system, which can realize early warning of arc faults, improve the accuracy and operational reliability of the ACFI system, and solve the problem of arc fault detection devices Due to the limitation of the installation location, the selective coordination and cooperation of the multi-level arc fault interruption system is realized, and the purpose of precise power interruption is achieved.

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