In this paper,the study of optimal coordination of directional overcurrent relays along with relay communication in HV substations is proposed. The relay coordination problem is non linear.It typically consist of two groups of control variables(Time Dial Settings:TDS and Plug Settings:PS). The purpose of relay coordination is to propose the suitable settings for all releases and ensure the coordination. The differential evolution is employed to solve for solutions of optimal relay coordination. The relay coordination is mainly done to improve selectivity of the relay to particular fault. ETAP is so popular for its capability for modelling of power system networks and analyzing various studies and Real Time simulations.

Power quality plays a very important vital role in the modern utility grid where sensitive loads are employed. Equipment damage, temporary shutdowns, product quality degradation and Voltage Sag are the major problem associated with power quality. Dynamic Voltage Restorer (DVR) is a powerful device which is used to improve voltage mitigation of weak buses associated in a multi-bus system. This paper incorporates the functional performance of DVR during voltage sag in the power system. Penetrating a voltage of required magnitude and frequency to restore the voltage across the load within the desired amplitude is the main objective of DVR. The proposed work based on modeling and simulation of DVR, in a closed-loop control of an eight bus system. Voltage compensation is done effectively using DVR in the Closed loop FLC controlled system and its analyzed with PID Controlled system. The simulation result shows Closed loop FLC system using DVR is observed to be faster than PID controlled systems.

Railways are one of the most commonly used modes of transport by a wide range of the population. Safety is an important factor in any transport system. Regular changes are being made to ensure safe and efficient travel of passengers. Yet, there are more problems need to be considered because of the high usage of railways. Fire accidents in rails are one of the major problems which threaten passenger's safety. To address these issues we propose a system in which the rail compartments are coupled electromagnetically whereas in the existing system the rail compartments are coupled mechanically. The foremost thing aim of the proposed system is to save the people life and the public assets. In this system, if a fire is sensed in a compartment, it will be isolated from other compartments by de-energizing the electromagnets in the coupling to prevent the spreading of fire. Then the location of the affected compartment is sent to the nearby railway station for rescue work. This system also aids in some emergency cases. Whenever a train is stopped in need of some external help, the location of the train is sent to the nearby railway station to address the emergency within seconds