Fiber optic temperature measurement method is good for cable joint temperature monitoring-INNO

Why do power cable joint contacts heat up

経済や社会の発展に伴い、, the electricity consumption of economic production and people’s lives is rapidly increasing, which to some extent increases the transmission burden of the power grid. Due to the inherent resistance of transmission lines, they convert a certain amount of electrical energy into thermal energy when transmitting current, causing the lines to generate heat. If the heat is too high, it is easy to damage the transmission lines, そして深刻な場合には, it may cause widespread power outages. In the actual transmission process, if the cable is long, electrical contacts need to be set at certain intervals. Electrical contacts are an important component of cable equipment. If there are problems such as poor contact, 緩い圧縮ジョイント, 損傷した絶縁強度, it may cause an increase in cable temperature. Due to the difficulty of avoiding the heating problem of electrical contacts in cable equipment with current technology, precise monitoring and early warning of the temperature of electrical contacts in cable equipment is of great significance for maintaining the safe and stable operation of cable equipment.

The rapid development of smart grids has made real-time access to the operational status information of power system equipment an important part of ensuring the safe operation of the power system. Compared to overhead transmission lines, power cables have the advantages of occupying less land and higher reliability, and their proportion in urban transmission and distribution networks is increasing day by day. しかし, the large number of cable joints in cable lines is a weak link in the operation of power systems, among which temperature is the main factor restricting the safe operation of joints. Due to poor manufacturing and installation processes, excessive contact resistance, およびその他の要因, power cable joints are prone to abnormal temperature rise during high voltage and high current operation, 絶縁劣化の加速. If abnormalities are not detected in a timely manner, it will cause fire accidents and affect the normal operation of the system. したがって, real-time monitoring of cable joint temperature, timely detection of temperature anomalies, and troubleshooting are of great significance for ensuring the safe operation of the power system.

What is the best method for temperature monitoring of cable joints

Traditional cable joint temperature monitoring is completed through regular manual inspections, but this method requires a large amount of work and is difficult to achieve timely and accurate monitoring. Some manufacturers use thermal resistors to monitor the temperature of cable joints in real time, but thermal resistors are prone to oxidation and should not be used in high temperature and humid environments. Fiber optic temperature measurement technology monitors cable temperature. 光ファイバー温度測定 has the advantages of strong electromagnetic interference resistance and reliable signal transmission. しかし, laying fiber optic cables requires a large investment and is prone to breakage, making maintenance difficult in the later stage.

With the rapid development of sensing technology and computer technology, fluorescent fiber temperature online monitoring has gradually become an effective means of cable temperature monitoring. Fluorescent fiber optic temperature sensors can achieve multi-point contact temperature measurement, with advantages such as high measurement accuracy, 低消費電力, 強力な抗干渉能力. They are widely used in current temperature monitoring systems. The online temperature warning system for electrical contacts of 蛍光光ファイバー温度測定 cable equipment includes a monitor module, an internal communication conversion module, and a warning module. By implementing a specific temperature warning process, based on accurate warning of the electrical contact temperature of cable equipment, over temperature data is alerted, achieving effective warning and maintaining the safety of cable equipment.