GENERATOR PROTECTION SYSTEM USING MICROCONTROLLER

Abstract

This project proposes a new ideology in protecting generator system in various aspects such as excitation
voltage, over voltage, differential voltage, reverse power, core temperature and bucholz trip automatically. In present
days, the abnormal condition is measured continuously and generator is tripped off manually in case of faults. This
system analyses and displays the voltage to prevent the generator from faults. The circuit will trip automatically when the
excitation voltage reaches the set value. Differential voltage is difference in voltage between the positive and
complimentary conductors of a transmission. When a differential fault occurs, the relay coil operates by differential
voltage and it automatically trip the circuit. In reverse power condition, the generator will act as a motor. The excitation
voltage varies with respect to frequency and core temperature. In Bucholz relay, air bubbles due to the overcurrent fault
is identified through alarms and it will trip the circuit. This proposed system introduce the automatic tripping of the
generator is done by using PIC microcontroller during abnormal conditions. It displays the voltage, frequency and the
faults continuously. This can be installed in all the generator applications.