Enhancing Stability of Multi-Machine IEEE 9 Bus Power System Network Using PSS

: An electric power system is a network of electrical components which  consists to supply, transfer, and use of electric power. Power system is also explained as grid which can be broadly divided into the generating system that supply the electrical power, the transmission system that carries the power from the generating centres to the load centres and the distribution system that feeds the power to nearby homes and industries. Power systems are designed to provide continuous power supply that maintains voltage stability. However, due to undesired events, such as lightning, accidents or any other unpredictable events, short circuits between the phase wires of the transmission lines or between a phase wire and the ground which may occur is called a fault. Due to occurring of a fault, one or more generators may be severely disturbed causing an imbalance between generation and demand. If the fault persists and is not cleared in a pre-specified time frame, it may cause severe damages to the devices which leads to a power loss and power sources. Therefore, protective equipment’s are installed to detect faults and clear and isolate faulted  parts of  the power system as quickly possible before the fault energy is propagated to the rest of the system.