Current application status of dry-type transformers

Due to the lack of oil, dry-type transformers do not have problems such as fire, explosion, pollution, etc. Therefore, electrical specifications, regulations, etc. do not require dry-type transformers to be placed in separate rooms. The loss and noise have been reduced to new levels, creating conditions for transformers and low-voltage screens to be placed in the same distribution room.
As an important equipment in the power system of offshore oil platforms, the safe and reliable operation of dry-type transformers is crucial for the operation of the power system. Dry type transformers are prone to insulation partial discharge and local overheating in humid salt spray marine environments. The application of online monitoring systems for dry type transformers can effectively achieve online monitoring of transformer status, ensuring the stable operation of the power system of offshore oil platforms.
The annual production of resin insulated dry-type transformers in China has reached 10000MVA, making it one of the countries with the largest production and sales of dry-type transformers in the world. Dry type transformers are now widely used in almost all electrical systems such as power stations, factories, hospitals, etc. With the promotion and application of the SC (B) 9 series with low noise (the noise of distribution transformers below 2500kVA has been controlled within 50dB) and energy saving (reducing no-load losses by 25%), the performance indicators and manufacturing technology of dry-type transformers in China have reached the world's advanced level.