Rai, Shekha2019-07-162023-10-202019-07-162023-10-202017ROLL NO.11610239https://gyan.iitg.ac.in/handle/123456789/1306Supervisor: Praveen TripathyThe conventional interconnected power system based on coal and hydro power generating plants are now causing a significant impact on the environment. Hence, the 21st century is witnessing the need to harness the renewable energy, such as wind, solar etc., and getting injected into the existing grid. This increasing generation of energy from the renewable sources, has significantly increased the operational challenges for the system operators. Earlier, the system operator has to worry mainly about the uncertainty of the load, but now they has also to deal with the uncertainty of the generation. Hence, the future grid requires more placement of sensor such as Phasor Measurement Units (PMU) to get time stamped data which helps towards on-line monitoring, estimation of dynamic or static models and real time control of the power systemenELECTRONICS AND ELECTRICAL ENGINEERINGRobust estimation of low frequency modes for online stability monitoring of power systemThesis