method for monitoring distribution transformer temperature on line

The invention provides a method for monitoring distribution transformer temperature on line. The method comprises the following steps: installing low-pressure burner temperature sensor on the junction of A, B, C and O phases on the low-pressure side of a distribution transformer, and/ or installing an oil temperature sensor in the transformer oil of the distribution transformer; circularly displaying the real-time temperature of each monitoring point by a temperature monitor connected with the oil temperature sensor; transmitting data to a monitoring server by an RS485 communication interface and/ or GPRS (General Packet Radio Service) communication module to be monitored; giving an alarm when temperature exceeds the preset temperature; and protecting the transformer by measures in time. Compared with the prior art, the on-line monitoring method for distribution transformer temperature is simple and has high degree of automation. After the method is used, a user can master in time when the local part of the distribution transformer begins to heat, and thus the user can take measures in time to prevent from burning out equipment, thereby guaranteeing the due service life of the electric equipment, and reducing accidents.