Monitoring device and monitoring method for cable ampacity of offshore platform

Abstract

A monitoring device and monitoring method for the current carrying capacity of an offshore platform cable, comprising: a power distribution cabinet, a fiber grating demodulation monitoring system, a current collection device, a transmission relay device, and a temperature sensor, wherein the current collection device is connected to the power distribution cabinet, The current collected by the current collection device is transmitted to the transmission relay equipment, and the transmission relay equipment converts the electrical signal into an optical signal; the temperature sensor is arranged on the surface of the cable, and the pigtail of the temperature sensor is collected into the optical fiber junction box In it, the optical fiber distribution box is connected to the fiber grating demodulation monitoring system through the optical cable. The monitoring method adopts the following steps: 1. Real-time current collection; 2. Temperature collection; 3. Conducting wire core temperature and ampacity calculation; and then discriminating monitoring data. The invention can dispatch and adjust the load of the cable, ensures the safe operation of the cable, solves the problem of power supply in an emergency, and realizes the rational utilization of the cable.

Description

technical field [0001] The invention relates to a method for monitoring the ampacity of a cable, in particular to a monitoring device and a method for monitoring the ampacity of an offshore platform cable. It belongs to the field of marine engineering. Background technique [0002] With the continuous deepening of the transformation and construction of offshore platforms, the use of power cables has increased significantly. Therefore, the operation management, monitoring and maintenance of power cables have become more and more important, and the workload has also increased significantly. In order to ensure the service life and safety of the cable lines put into operation, the cable lines are often operated at a low load, resulting in a waste of transmission capacity, which is very uneconomical. Moreover, since the rated ampacity of the cable is calculated on the assumption that the operating environment is the worst, its value is relatively small, so the utilization rate o...

AI Technical Summary

Problems solved by technology

In the stage of power cable selection and laying, since it is impossible to fully consider the actual operating environment, it is usually carried out according to the standard ambient temperature, which will cause the cable to run in overheating when the ambient temperature is high. state, reducing the life of the cable run

[0006] In actual work, in order to avoid the above situation, it is solved by properly retaining the load capacity, but this makes the use of cables uneconomical.

Images