Abstract
The article presents the most important methods and technologies used to monitor the temperature of low voltage power supply cables, which supply 400V in three-phase mode, trying to highlight the method of using composite materials, materials that are included in the material constructive of the cables, these having the role of temperature sensor. Temperature monitoring is performed along the electrical cables, to transmit in real time information on the evolution of temperatures along the entire length of the cable, at any point, during their entire life. The article will focus on the method of inserting optical fibres inside the power supply cables, which will be used as a temperature measuring instrument. Using the Reman effect, a method of reflecting the injected light at one end of the optical fibre, by processing the received signals, the evolution of the temperature inside the electric cable can be detected with great precision, over long distances and with great accuracy. the evolution of the temperature inside the electric.
Highlights
For the distribution of electricity in the national electricity system, a special role is played by the electricity transformation stations and sub distribution stations connected to the electrical supplier network, and those owned by the end user [1]
To increase the operational safety of the electrical installations and to increase the life of the power supply circuit, the present paper proposes to make a continuous temperature monitoring for the low voltage power supply cables
The main purpose of the article is to prove the importance of obtaining information about the inner temperature inside the low voltage electrical cables, this is done using the DTS system, and the most suitable place for mounting the fibre optic cable for temperature detection is inside the cable, not on its outside as it is practiced in medium and high voltage cable systems
Summary
For the distribution of electricity in the national electricity system, a special role is played by the electricity transformation stations and sub distribution stations connected to the electrical supplier network, and those owned by the end user [1].At present, most of the transformation stations and sub-distribution stations, and those of electricity transmission to these stations, being built many years ago, have outdated equipment, with advanced moral and physical wear, which will involve their replacement during period [1].The impact of the aging of electricity distribution facilities is related to the reliability and operational safety offered to the electricity consumer [1].To have continuity in the power supply of an electrical receiver, the correct and safe operation of the power supply circuit will be considered.One of the most important components of the power supply circuit is the electrical cables that will be discussed in this article.To know the technical condition of the electric cables, it is necessary to monitor some functional parameters, respectively their diagnosis. For the distribution of electricity in the national electricity system, a special role is played by the electricity transformation stations and sub distribution stations connected to the electrical supplier network, and those owned by the end user [1]. Most of the transformation stations and sub-distribution stations, and those of electricity transmission to these stations, being built many years ago, have outdated equipment, with advanced moral and physical wear, which will involve their replacement during period [1]. To have continuity in the power supply of an electrical receiver, the correct and safe operation of the power supply circuit will be considered. One of the most important components of the power supply circuit is the electrical cables that will be discussed in this article. To know the technical condition of the electric cables, it is necessary to monitor some functional parameters, respectively their diagnosis
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