OPGW DC ice-melting system

Abstract

The invention discloses an OPGW DC ice-melting system, and the system comprises an ice-melting ground line, an ice covering measurement sensor, an ice covering measurement host, an ice-melting measurement host, a DC ice-melting power supply, a 485 concentrator, a switcher, a monitoring terminal, and an optical cable joint box. The ice-melting ground line is connected with the ice covering measurement host through the optical cable joint box, and the ice covering measurement sensor is connected with the ice covering measurement host through a single-mode optical fiber. The ice covering measurement host, the ice-melting measurement host and the DC ice-melting power supply are respectively connected with the 485 concentrator. The ice covering measurement host and the ice-melting measurement host are connected with the monitoring terminal through the switcher. The system achieves the overtemperature monitoring in a long-distance circuit ice melting process and circuit ice melting control under the different conditions in a deicing period through employing the technology of distributed optical temperature measurement and the technology of on-line analysis. The system achieves the ice covering monitoring of a power transmission rod tower under the on-site passive conditions, electromagnetic radiation resistance conditions and severe monitoring conditions through employing the technology of optical fiber grating ice covering measurement, and has a higher practical value.

Description

technical field [0001] The invention relates to a direct current ice melting system, in particular to an OPGW direct current ice melting system based on distributed optical fiber temperature measurement and fiber grating ice thickness measurement. Background technique [0002] The ground wire of the overhead transmission line is used for lightning protection in the transmission line. OPGW (OPGW) has the functions of communication channel and lightning protection wire, and has been widely used in high-voltage transmission lines for more than ten years. In terms of grounding methods, at present, ordinary lightning conductors in engineering mostly adopt the method of section insulation and one-point grounding; while OPGW basically adopts the method of base-by-base grounding. Due to the fact that the ground wire and the iron tower are not insulated under normal circumstances, the previous DC deicing scheme for transmission conductors cannot be directly applied to the icing of t...

AI Technical Summary

Problems solved by technology

The invention patent with the application number 200910175452.2 discloses a distributed optical fiber temperature measurement system, including a single-chip microcomputer control board, an optical fiber temperature field information acquisition module, a photoelectric detector and a circuit signal post-processing module, which can complete the temperature monitoring of the temperature measurement optical cable. There is no mention of the application on the OPGW optical cable to solve the temperature over-limit alarm and the control function of the deicing progress during the ice melting process

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