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Method and system for arc light protection of medium and low voltage busbars

A busbar and arc technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as the inability to quickly remove faults or the requirements of protection coverage, and achieve the effect of easy installation and safe operation.

Active Publication Date: 2015-10-28
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the existing domestic medium and low voltage switchgear and busbar protection schemes can meet the requirements of quick fault removal or protection coverage

Method used

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  • Method and system for arc light protection of medium and low voltage busbars
  • Method and system for arc light protection of medium and low voltage busbars
  • Method and system for arc light protection of medium and low voltage busbars

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] like figure 1 As shown, the medium and low voltage busbar arc protection system is composed of main control unit 1, auxiliary unit 2, current unit 4, arc unit 3, circuit breaker switch 6 and other components. Optical fibers and data lines are used between components to transmit tripping signals and data information. The arc sensor 31 can be connected to the main control unit 1 or the arc unit 3 (the arc sensor can be directly connected to the main control unit, if the number of switch cabinets or busbars to be protected is small, the arc unit can be omitted), and the current unit 4 is used to transmit current signal, the arc light protection system measures the arc light in the switch cabinet through the arc light sensor 31, and if the current unit 4 detects an overcurrent signal at the same time, it is judged that an arc light fault has occurre...

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PUM

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Abstract

The invention discloses a medium-low voltage bus electrical arc light protection method and system. The system comprises a main control unit, wherein the input end of the main control unit is connected with at least one auxiliary unit; the output end of the main control unit is connected with at least one circuit breaker; each auxiliary unit is respectively connected with an arc light unit, a current unit and a current unit; the arc light unit is connected with an arc light sensor; the current unit is connected with a current sensor; and the current unit is connected with a temperature sensor. The light sensitive range sensitivity can be regulated between the arc light unit and the main control unit, the sensitivity is influenced by the arc light sensor and the length of an optical fiber, and the sensitivity can be regulated within the range of 10-50KLUX. The electrical arc light protection can rapidly remove the medium-low voltage bus stoppage, and the safety operation of a transmission and distribution power grid is ensured.

Description

technical field [0001] The invention relates to an arc light protection method and system for medium and low voltage busbars, belonging to the field of arc light protection. Background technique [0002] When a short-circuit fault occurs on the medium and low-voltage busbars, the arc light generated will cause great harm to equipment and personnel. At present, special fast busbar protection is generally not configured in domestic medium and low voltage busbar systems, but relies on the backup protection of the upper-level transformer to remove the short-circuit fault of the busbar, which leads to the prolongation of the fault removal time, increases the damage of the equipment, and destroys the busbar. In severe cases, the accident may further expand, threatening the stable operation of the system. Arc light protection is a fast protection for medium and low voltage busbars. A photosensitive probe is used to monitor the arc light in the switch cabinet. Once an arc f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/22
Inventor 李立生李建修邵志敏
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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