How to choose the manufacturer of temperature measurement devices for box type substation transformers

A box transformer is a box type substation, or simply a box type transformer. After years of operation, the low-voltage circuit breaker of the on-site box transformer is prone to spontaneous combustion accidents under high loads. Due to the early stage of the transformer being in the blind spot of the main control monitoring, it could only be discovered by the main control personnel after the circuit breaker self ignition accident expanded and burned out, and the transformer tripped, resulting in severe equipment losses and significant economic losses on site. The intelligent monitoring system for box transformer circuit breakers detects the temperature at different positions on the circuit breaker and the internal temperature of the substation through temperature sensors. It is transmitted to the main control background using Internet of Things modules. Staff use data display units to view temperature monitoring information, and abnormal data alarm units for data monitoring. When the data is unstable, an alarm is given to staff to facilitate timely detection of abnormal circuit breakers. Before the processor controls the switch to cut off the power supply urgently, abnormal substation boxes are processed to avoid affecting the normal operation of the circuit breaker. Temperature is a key indicator for measuring the safety and potential hazards of power equipment operation. At present, the application of temperature measurement in power at home and abroad mainly has the following characteristics:

1. Traditional handheld infrared thermal imager

The temperature measurement characteristics require the operation team to patrol. Due to the inability to transmit light, it is not possible to test the temperature of narrow enclosed spaces, such as the temperature inside the switchgear and other wiring cannot be tested, and real-time transmission cannot be achieved;

2. Infrared thermal imaging online monitoring system

The cost is too high, difficult to promote, and unable to achieve testing in narrow spaces;

3. Fluorescent fiber optic temperature measurement system

Transformers can use fluorescent fiber optic temperature measurement devices, dry-type transformers, and oil immersed transformers to accurately monitor the temperature of windings in real-time for 24 hours.

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