Abstract
With power systems switching to smart grids, real-time and on-line monitoring technologies for underground distribution power cables have become a priority. Most distribution components have been developed with self-diagnostic sensors to realize self-healing, one of the smart grid functions in a distribution network. Nonetheless, implementing a real-time and on-line monitoring system for underground distribution cables has been difficult because of high cost and low sensitivity. Nowadays, optical fiber composite power cables (OFCPCs) are being considered for communication and power delivery to cope with the increasing communication load in a distribution network. Therefore, the application of distributed temperature sensing (DTS) technology on OFCPCs used as underground distribution lines is studied for the real-time and on-line monitoring of the underground distribution power cables. Faults can be reduced and operating ampacity of the underground distribution system can be increased. This paper presents the development and improvement of an intelligent cable monitoring system for the underground distribution power system, using DTS technology and OFCPCs as the underground distribution lines in the field.
Highlights
With the application of the Smart Grid concept to the power system to optimize energy efficiency, technologies for efficient system operation and real-time, on-line monitoring are being developed in the distribution system
In the case of the optical fiber composite power cable (OFCPC), which is a power cable embedded with optical cables, electrical power networks and communication networks can be established simultaneously
This paper presents the improvement and test results of the intelligent cable monitoring system, which is to be applied to underground distribution lines in the field
Summary
With the application of the Smart Grid concept to the power system to optimize energy efficiency, technologies for efficient system operation and real-time, on-line monitoring are being developed in the distribution system. No real-time, on-line monitoring is being carried out on cables, which account for a high percentage of faults in underground distribution systems. Distribution lines are continually being extended or newly installed to address the ever-increasing demand for power by applying comprehensive base ampacity to the operation of the system; problems related to the securing of installation sites have been increasing. Smart grid application requires first, the establishment of electrical power system communication networks. For underground distribution systems, electrical power networks and communication networks operate separately. Distributed temperature sensing (DTS) technology to measure the temperatures of the optical cables can be applied as well
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