System and method for monitoring and controlling a transformer

A system for monitoring operating parameters of a transformer, the system comprising:

• a temperature sensor that measures temperature in the transformer and outputs a temperature signal;
• a winding current sensor that measures current in the windings of the transformer and outputs a current signal;
• a dissolved gas sensor to measure dissolved gases in the transformer;
• a sensor that senses the load tap changer (LTC) tap position from among a plurality of positions and outputs a LTC position signal;
• and
• a processor that receives over a wireless communication link the temperature signal and the current signal, wherein the processor calculates a percentage loss of life values of the transformer based on a plurality of:
• the temperature signal, the current signal, a thermal capacity of the transformer, oil and winding-time constants, winding gradients, and ambient temperature, and the processor receives over the wireless communication link the measured dissolved gas and raising an alarm when the level of dissolved gas exceeds a predetermined threshold, and the processor receives the LTC position signal and generates a diagnosis signal based on the LTC position signal, and the processor receives over the wireless communication link one or more signals that convey information from a plurality of transformer sensors, the information including sensed LTC tap position from among a plurality of LTC positions, dissolved gas level, oil temperature, fluid level, pressure level and transformer winding current;
• wherein the processor is configured to program threshold levels over the wireless communication link related to a plurality of sensors.