Which is better for fluorescent fiber optic temperature measurement in switchgear, infrared temperature measurement in switchgear, or wireless temperature measurement in switchgear

In recent years, solid insulated switchgear has been widely praised by State Grid Corporation of China for its superior environmental adaptability, maintenance free, and good environmental performance. The solid insulated switchgear adopts a new environmentally friendly solid material as the insulation medium, and the array switch and live conductor are poured and sealed as a whole. Compared with gas insulated switchgear, its volume is smaller and its pollution resistance is stronger. However, the thermal power of the primary circuit is high and the heat dissipation is poor, which is caused by overheating faults due to poor contact of the wiring pile head.

In order to timely detect and solve the hidden faults of hot spots in switchgear, many scholars have studied temperature detection technology inside the cabinet. Infrared, fiber optic, and wireless temperature measurement methods are currently relatively mature temperature detection technologies.

Disadvantages of infrared temperature measurement

The spatial path between the infrared temperature measurement camera probe and the acquisition point must not be obstructed, and it is also difficult to meet the installation requirements on the engineering site. Moreover, the delay effect attached to the gas diffusion process can also bring result errors.

Infrared technology has good stability and anti-interference performance when not in contact with the monitoring object during testing, but its test results are easily affected by factors such as external materials and the position of the collection probe, and the positioning of the infrared temperature measurement probe is somewhat difficult.

Disadvantages of wireless temperature measurement

Wireless technology collects temperature data from multiple monitoring points, and then uses wireless transmission to transmit the measured data back, analyzing the results to achieve the purpose of online monitoring. For high-voltage cabinet joints with external insulation materials, it is generally difficult to achieve direct temperature measurement of the joints. Scholars have raised issues such as difficulty in positioning, internal magnetic field interference, and sensor leads affecting creepage distance.

The advantages of fluorescence fiber optic temperature measurement

The fluorescence fiber optic temperature measurement system for the switchgear adopts the fluorescence fiber optic temperature sensing technology independently developed by FJINNO Technology. The light source and fluorescence fiber optic are all imported components, which have the advantages of high voltage resistance, no electromagnetic interference, intrinsic safety, long-term reliability, and easy expansion. It can monitor the temperature of various monitoring points such as the high-voltage switchgear and ring main unit of the power generation and supply system in real-time online. It has RS485 and fiber optic communication interfaces, MODBUS, IEC61850 communication protocols, and can provide backend systems and special software, making the switchgear further intelligent, digital, and networked, suitable for all needs of intelligent substations.

• Prev：Intelligent fluorescent fiber optic temperature measurement device, substation fiber optic temperature measurement system, switchgear transformer winding fiber optic
• Next：Manufacturer of transformer fiber optic temperature measurement system