At the end of the 1980s, when the platinum thermal resistance temperature control system first appeared, it was an ordinary electronic circuit, a non-intelligent structure, and a single function, with only display and thermal protection functions. Later, in order to realize remote display and control of temperature signals, 4 ~ 20mA current output was added to the temperature control system, so that the temperature control system has the function of a temperature transmitter, and simultaneously outputs the temperature signal during temperature measurement.
Subsequently, in order to further improve the operation and management level of the power system, a temperature control system with a computer communication interface appeared, enabling the temperature control system to communicate with an external monitoring system. With the development of communication technology, the RS232 interface was first used to output information to the data processing system. However, due to some restrictions, it was gradually replaced by an RS485 interface with a simple structure, easy implementation and easy maintenance. At present, the temperature control system of most intermediate frequency furnace transformers can transmit the three-phase patrol temperature value, transformer operating status information and the set special temperature value to the monitoring center through the communication interface. The monitoring center can also set the temperature of the temperature control system. to modify.
With the continuous expansion of the application field of the intermediate frequency furnace transformer, the function of the temperature control system has also been continuously improved. On the basis of the original function, there are functions such as sound and light alarm, manual fan operation, manual muffler, manual trip, and "black box". With the development of society, the power system has higher and higher requirements for transmission and distribution equipment. Intelligent power equipment has attracted people's attention, and its reliability and stability have attracted attention from the industry. Network transformation, the transformer industry encountered rare opportunities, but also brought opportunities for the development and progress of transformer components.
The application fields of intermediate frequency furnace transformers are constantly expanding, and people have put forward more and higher requirements for the centralized monitoring of transformer operating conditions. The installed intermediate frequency furnace transformers have problems such as various distribution types, large distance differences between them, unattended operation, and multiple monitoring systems. If the temperature control system still uses a single wired communication method, it is difficult to meet the requirements in many cases. Networking, intelligence, integration, and standardization of communications are contemporary development trends. For different applications, the temperature control system should also improve the communication structure and try to be as diverse as possible and use standard communication methods. For example, a temperature control system can have multiple communication interfaces, can carry multiple baud rates, or use advanced fieldbus technology, wireless data transmission technology, infrared remote control, telemetry technology, etc., which can greatly improve the system's ability to respond to new environments. Adaptability and improve its compatibility.