Arc light monitoring and protecting system

Abstract

The invention discloses an arc light monitoring and protecting system, wherein two light collecting ports are connected with a photoelectric converter, the photoelectric converter is connected with a light sensitivity regulating part, the input is connected into a single-chip microcomputer ATmega16A, A, B and C current receiving ports are connected with a current sensitivity regulating part, the current sensitivity regulating part is connected with the single-chip microcomputer ATmega16A, the programmable logic function is inputted into the single-chip microcomputer ATmega16A, the output of the single-chip microcomputer ATmega16A is divided into two lines which are respectively connected with a relay, the output is connected into a protection loop, the single-chip microcomputer ATmega16A is connected with a 485 communication module, and the 485 communication module is connected into a power integrated automation system or a monitoring host after conversion. By utilizing the arc light monitoring and protecting system, the fast protection problem when arc light is generated due to short-circuit of a branch circuit of a feeder cabinet can be thoroughly solved, the short-circuit fault of the feed branch circuit of a substation can be avoided, the problem of wide-area burning of the substation can be avoided, and the speed at a trip outlet of the relay is controlled within 10 milliseconds.

Description

technical field [0001] The invention is used for protection systems in the electric power industry, and particularly relates to an arc light monitoring and protection system. Background technique [0002] In the power supply system, according to the current design standards of relay protection in my country, the special fast busbar protection system is generally not configured in the medium and low voltage busbar system, but relies on the backup protection of the upper level component (transformer) to cut off the busbar short line fault , The feeder cabinet is not equipped with quick-break arc protection, which often makes the fault develop and expand, resulting in huge economic losses. [0003] In recent years, switchgear equipment has been severely burned due to arc short-circuit faults such as cable head explosion and cable trench fire, and some have even developed into major equipment accidents of "burning and burning"; and the main transformer has been damaged due to ext...

AI Technical Summary

Problems solved by technology

[0007] The 500ms equipment is seriously damaged, and the personnel on site are also seriously injured. Part of the equipment must be replaced before it can be put into operation again.

In the state of an accident, the power supply of the busbar of this section is directly disconnected. However, in actual operation, the tripping and power loss of the busbar in the substation is a power supply accident. If there is an arc short circuit in a certain feeder cabinet, the power switch of the busbar will be tripped and the entire power supply system will be cut off. , is not allowed in the operating procedures

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