In 110kV, 220kV, 330kV, and 550kV oil immersed transformers, three cooling methods are mainly used: natural oil circulation air cooling, forced oil circulation air cooling, and forced oil circulation water cooling. The vast majority of them use natural oil circulation air cooling and forced oil circulation air cooling. The transformer air-cooled intelligent control cabinet is an intelligent control cabinet designed for three cooling methods. It can achieve remote automatic and local manual control modes, and can upload and display various information as well as set downstream control, to control the entire cooling system of the transformer, achieving the goal of energy saving and extending the service life of the radiator.

According to the national demand for electricity development. Advocate for the development towards a low-carbon economy and intelligent direction. Our company has developed an intelligent transformer air cooling control cabinet, which is an improved power transformer air cooling control device developed by our company. It is a high reliability fan control device with PLC as the control center and mainly composed of components (or joint venture components).

The intelligent transformer air cooling control cabinet adopts a programmable logic controller (PLC), which replaces a large number of electromagnetic relays, reduces mechanical contacts as much as possible, improves equipment reliability, and facilitates maintenance. During the operation of the device, the environmental temperature, transformer temperature, changes in transformer load, and the operation and fault conditions of all equipment are constantly monitored, and adjusted according to the control program at any time to achieve cooling and intelligent cooling of the transformer, as well as to achieve energy-saving and extend the service life of the radiator.

1) Adopting dual power supply mutual switching, with one main and one backup mode to ensure high reliability of power supply.

2) The PLC control unit adopts Siemens brand, with strong anti-interference ability and reliable operation.

3) In the event of automatic control mode failure, it can automatically switch to manual control mode.

4) It can communicate and connect with the DCS of power plants and the main system of unmanned substations to facilitate upstream and downstream communication of various signals.

5) It can be controlled based on temperature and load switch values, as well as analog values of temperature and load.

6) The control cabinet adopts a large LCD touch screen with a user-friendly human-machine interface, which is convenient for monitoring and operation.

7) Install a temperature and humidity control system inside the cabinet, with a heater for heating and a fan for dehumidification.

1. Working power supply: three-phase four wire AC dual power input AC380V ± 15%; DC input DC110V ± 20%;

2. Voltage resistance strength: ≥ AC2500V/1min;

3. Insulation performance: ≥ 100M Ω;

4. Working temperature: -25 ℃ to+50 ℃;

5. (Joint venture) circuit breaker: The quality of the switch components inside the cabinet is stable and reliable;

6. Siemens PLC anti electromagnetic interference performance: meets the requirements of GB/T 14598 standard;

7. Temperature and humidity sensor: highly integrated; Temperature measurement accuracy: ± 0.3%; Humidity measurement accuracy: ± 2%; Temperature range: -10 ℃ to+100 ℃; Humidity range: 0-99.99% RH