Optical fiber loop detection system

Abstract

The invention discloses an optical fiber loop detection system, which relates to the technical field of detection and can solve a problem that an optical fiber loop detection result is inaccurate. The optical fiber loop detection system is characterized in that a silicon controlled rectifier valve unit is connected to forward voltage; terminal voltage of the silicon controlled rectifier valve unit is detected; a central controller judges whether the terminal voltage is greater than a preset voltage protection threshold or not; if the terminal voltage is judged to be greater than the preset voltage protection threshold, an overvoltage conduction instruction is generated; a protection recovery unit generates an overvoltage conduction pulse; if the terminal voltage is judged to be not greater than the preset voltage protection threshold, an optical fiber testing instruction is generated; a valve base electronic device generates an optical fiber triggering pulse according to the optical fiber testing instruction; a multi-mode star coupler sends the overvoltage conduction pulse or the optical fiber triggering pulse to the silicon controlled rectifier valve unit; a silicon controlled rectifier voltage detecting board detects loop detection signals at two ends of the silicon controlled rectifier valve unit; the central controller detects the pulse width of the loop detection signals; and the central controller determines whether an optical fiber to be detected is of a normal state or not. The optical fiber loop detection system is mainly applied to the process of detecting an optical fiber loop.

Description

technical field [0001] The present application relates to the technical field of detection, in particular to a system for detecting optical fiber loops. Background technique [0002] DC high-voltage transmission is a way of power transmission in my country's power grid. A converter station needs to be built in the DC high-voltage transmission line to complete the conversion of AC power into DC power or the conversion of DC power into AC power. The equipment in the converter station mainly includes: converter valves, converter transformers, AC switchgear, DC switchgear, DC filters, control and protection devices, ground electrodes outside the station, and communication systems, etc. The communication system is used for information exchange between converter stations and voltage control and scheduling within the converter station. The communication methods in the communication system include power line carrier, microwave, and optical fiber. [0003] The communication device...

AI Technical Summary

Problems solved by technology

[0005] This application provides a system for detecting optical fiber loops to solve the problem of inaccurate detection results of optical fiber loops

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