전력 케이블용 분산 광섬유 온도 측정 시스템, factory in China-INNO

Why do power cables need temperature measurement

In power supply lines, cable joints are the weakest link in the safe operation of the power system. 통계에 따르면, cable joint accidents account for a large proportion of cable accidents. The reason is that the cable joints have problems such as poor contact, 느슨한 압축 조인트, 그리고 절연 강도가 손상되었습니다.. 전기 부하가 증가하거나 날씨가 더운 환경에서, abnormal temperature increases may occur, which not only may cause cable damage but also lead to large-scale power outages and even fire accidents.

After the cable is laid, in order to make it a continuous line, each section of the line must be connected as a whole through cable joints. 하지만, due to the skin effect of charges, eddy current loss, and insulation medium loss, additional heat is generated, which causes the temperature of the cable to rise. When the load current of the cable is too large, the temperature of the cable joint will rise sharply, causing the core wire to heat up and causing a fire; 게다가, there are gaps at the cable joints, which can allow rainwater to seep in and cause the cable joints to become damp, 사고로 이어지는.

현재, staff generally manually measure the temperature at the cable joint, which increases the workload of the staff, and cannot measure the temperature in real time, making it difficult to timely understand the situation in the event of an accident.
요약하면, the existing technical problem is that the staff manually measures the temperature at the cable joint, which increases the workload of the staff and makes it difficult to timely understand the situation in the event of an accident; Lack of corresponding protective devices at cable joints can easily lead to accidents caused by moisture in cable joints.

In order to reduce intermediate joint failures, 한편으로는, emphasis should be placed on improving the quality of cable products and on-site production processes, 그리고 다른 한편으로는, monitoring and diagnosis should be strengthened. 현재, the main monitoring methods for power cables include online monitoring of insulation resistance, 부분방전 온라인 모니터링, online monitoring of DC component method, 온도의 온라인 모니터링. 온도, 비 전기량으로, is an important parameter reflecting the operating status of cables. The occurrence of various faults in intermediate joints is not a sudden process. It is usually due to the continuous increase in temperature, 절연 노화, increased contact thermal resistance, and increased leakage current before thermal breakdown occurs, which is a process from quantitative to qualitative change. By monitoring the temperature of the intermediate joint in real-time and analyzing historical data, the location of insulation defects can be determined, and the insulation condition of the intermediate joint can be grasped. 게다가, excessive current carrying capacity of power cables can cause the working temperature of the cable core to exceed the allowable value, resulting in a shortened insulation life of the cable compared to the expected value; If the current carrying capacity is too small, it will make the copper or aluminum materials of the wire core unable to be fully utilized. 그러므로, the real-time measured temperature value can be used to calculate the temperature of the wire core conductor to achieve the purpose of load regulation and dynamic capacity increase.

Effective monitoring of the temperature of intermediate joints in power cables can determine local overheating points, 단열재 노화 조건 평가, and timely detect safety hazards through real-time monitoring values and historical temperature values; 동시에, real-time monitoring values can also be used to calculate the temperature of the wire core conductor, 이는 신뢰성을 보장하는 데 큰 의미가 있습니다., 안정, 전력케이블의 용량을 합리적으로 활용하여 부하를 조절하고, 허용범위 내에서 용량을 동적으로 증가시켜 전력계통의 경제성을 도모합니다..

그만큼 distributed fiber optic temperature measurement system for power cables can monitor the temperature of the cables online and accurately locate the heating fault points of the cables. Monitoring on-site safety and reliability, 정확한 측정, 그리고 안정성이 좋다; 온도 측정 정확도는 ±에 도달합니다. 1 ℃, is not affected by electromagnetic interference, and the sensor does not need to be calibrated for long-term use; 실시간 온라인, 24-hour monitoring, 24/7 근무 중, 인간의 과실을 제거; Strong scalability: 그만큼 온도 측정 시스템 can adopt single to multiple channels, which can be easily connected to the internal power network and support various communication protocols and specifications; Fast temperature measurement speed, using synchronous scanning and parallel detection technology, temperature data collection and transmission can be completed within seconds; Can achieve measurement of temperature rise rate, providing strong technical support for temperature monitoring; Remote transmission, with distances ranging from several kilometers to tens of kilometers, is easy to network.