NB-IoT-based remote monitoring system and method for cable connector temperature

Abstract

The invention provides an NB-IoT-based remote monitoring system and method for the cable connector temperature. On the basis of the temperature sensing, signal processing monitoring, and the principleof NB-IoT remote technology, a temperature sensor and a monitoring alarm device are installed at a monitored power cable connector. The temperature sensor collects power cable connector temperature parameters in operation in real time; and a processor is installed in the monitoring alarm device to analyze the state data in real time. When over-limit alarm occurs, alarm information is sent to thepower company monitoring center through an NB-IoT wide-area communication network, thereby realizing online detection of the running status of the cable or cable intermediate connector; and the decision is provided for distribution network operation and equipment status maintenance. A problem of difficult maintenance of the underground power cable as well as actual problems in the operation of thepower system is solved; and the reliability of power supply is improved.

Description

technical field [0001] The invention relates to the field of state monitoring of power equipment, in particular to an NB-IoT-based remote monitoring system and method for cable joint temperature. Background technique [0002] With the rapid economic development and urbanization, the localization of power supply lines has become a trend. However, most power cable trenches are narrow and closed, making it difficult to clean and maintain; water accumulation is prone to occur, resulting in silt accumulation, garbage piles, long-term pollution accumulation, and cable immersion will lead to accelerated cable aging. On the other hand, long-distance cables are connected by multiple cables, and there are multiple joints in the middle. Improper handling of the joints will increase the contact resistance, the cables will be affected by external forces, and the temperature of the cable joints will increase due to long-term high-current operation. Bring security risks to production and ...

AI Technical Summary

Problems solved by technology

Therefore, it is very important to monitor the temperature of the cable intermediate joint in real time without interference from the external environment and strong electromagnetic field, so as to be able to detect potential safety hazards in time

[0004] At present, there are generally three methods for online monitoring of the operating status of underground cables: one is manual inspection, and the temperature of high-voltage cable joints is collected by hand-held infrared thermometers. measure temperature

The second is to use distributed optical fiber to measure temperature, which requires laying optical fiber, and the construction is difficult

The third is the collection terminal based on GPRS, but the communication quality is poor, the power consumption is large, and it cannot be self-powered, so it is difficult to run for a long time

The above-mentioned various methods are difficult to be popularized on a large scale due to the existence of fatal shortcomings.

Images