Arc light detection method and device

Abstract

The invention provides an arc light detection method. The method comprises the following steps: S1, an arc light sensor is installed in a to-be-monitored switch cabinet small chamber, wherein the arclight sensor is used for receiving an arc light signal, and a uniform secondary illuminant is formed; S2, an optical signal emitted by the secondary illuminant is transmitted to a protection device, photoelectric conversion is completed by the protection device, and the converted original electric signal is acquired at a fixed sampling frequency; and S3, the protection device judges whether a fault occurs or not through arc light signal matching retrieval and in combination with the acquired electric signal according to a power frequency variable quantity current criterion, and if the fault occurs, the protection device gives an alarm or trips. According to the arc light detection method provided by the invention, strong current and weak current can be effectively isolated, and arc light signals can be monitored in an omnibearing, real-time and safe manner. The invention further provides an arc light detection device applying the arc light detection method.

Description

technical field [0001] The invention relates to the field of medium and low voltage bus relay protection, in particular to an arc light fault detection method and detection device. Background technique [0002] At present, the medium-voltage systems in my country's power grid structure, that is, 10kV and 35kV levels, mostly use closed central cabinets to lead out with cables. Compared with the gap, the manufacturing quality has declined in recent years, and the probability of short-circuit accidents is relatively high. [0003] The consequence of the bus failure is that the gas generated by it expands rapidly and causes the switchgear to explode; the high temperature of the arc causes the copper bar, aluminum bar, and cable to burn; the switchgear vibrates strongly, causing the fixing parts to loosen; Sound, etc. may cause personal injury. [0004] Since the current relay protection regulations do not require special protection for medium and low voltage buses, the traditio...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to solve the current technical problems such as insufficient reliability, insufficient monitoring range, and slow detection speed when judging arc light faults.

Images