Abstract: One of the most delicate, costlier and important component of the power system is synchronous generator and a principal requisite for the power system stability and reliability. Since synchronous generators are rotating machines and always operate in parallel with a large power system network, so they might be prone to a number of internal faults or abnormal operating conditions such as loss of field, over excitation, overvoltage, current unbalance, loss of prime mover etc. Thus, the synchronous generators need to be protected very cautiously from such types of abnormal conditions. This paper has presented the modelling, simulation and analysis of a complete motoring protection system constructed on the software MATLAB/SIMULINK® for the motoring condition of a large synchronous turbo generator.

Keywords: Synchronous Generator, Motoring Protection, Reverse Power Relay, MATLAB/SIMULINK®.