Method and device for dynamically monitoring temperature of power cable connectors

Abstract

The invention discloses a device for monitoring temperature of power cable connectors. Magnetic sensing modules are arranged around each cable connector, a plurality of magnetic sensing modules are arranged to form a group, and a device is provided with a temperature reading device. The antenna portions of the magnetic sensing modules can sense electromagnetic wave frequency emitted by an emitting module of the temperature reading device after being influenced by the temperature of respective cable connectors. By means of energy obtained by magnetic sensing current, the magnetic sensing portions of the magnetic sensing modules send outwards signals in memory chips of the magnetic sensing modules through the antenna portions, and the signals are received by a receiving module of the temperature reading device and sent to the processing module for processing. A method and the device for dynamically monitoring the temperature of the power cable connectors have strong real-time performance and practicality and ensure real-time performance of status information by collecting and updating data at regular time. Temperature parameter variation reaches a temperature measurement communication terminal in a wireless transmission mode, and the received temperature signals are accurate and reliable. The device is highly safe and reliable in installation, operation and maintenance.

Description

technical field [0001] The invention relates to the technical field of wireless equipment, in particular to a method and device for dynamically monitoring temperature changes of power cable joints. Background technique [0002] In high-voltage power cables and wires, there is a cable joint every 300-500 meters on average for 6-10KV cables. Due to the effect of current at the joint, its temperature changes; the operating temperature at the joint is an important parameter that reflects the operating status of the power system. The intermediate joint is the weakest link in the safe operation of the power system. In the case of high voltage and high load, when the temperature of the cable joint rises sharply and exceeds the critical temperature that it can withstand, it may cause combustion and explosion of the cable joint, causing a large-scale power outage in the power supply system. Therefore, the effective detection of the temperature of the power grid cable joints and the ...

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Problems solved by technology

[0003] Although there are many types of temperature measuring devices at present, none of them can adapt to the characteristics of large number of cable joints, poor concentration, serious electromagnetic interference, dark and humid, many corrosive and harmful gases, and generally no voltage working power supply on site.

At present, there is no system device dedicated to temperature detection of cable joints, and many enterprises have to use manual periodic measurement to monitor the temperature of power cable joints

Since the cables are laid in cable trenches or buried underground, it is not only very inconvenient for workers to measure, but sometimes it is also very dangerous.

Due to the inability to monitor continuously, some potential failures cannot be discovered in time, and there is still a risk of failure

[0004] Due to the above reasons, there is a need for a safe, reliable, accurate and real-time method and device for temperature monitoring and detection of power cable joints, and the on-site detection signal is transmitted to the monitoring center and published on the internal safety production network of the power system. , which is convenient for relevant personnel to monitor, count and analyze in real time; in addition, because the data of multiple measurement points are not connected into a network, it is not convenient for unified management, and networked and automated management cannot be realized temporarily

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