Power System Stability Analysis Using Synchrophasors for Self Healing of Smart Grid

Abstract

Indian power grid with installed capacity of more than 360 GW is one of the world s most rapidly growing, synchronized national grid serving more than one billion population. The comprehensive smart grid vision and road map for newlineIndia has been aligned to Government of India s all-encompassing objective of newline Access, Availability and Affordability of Power for All . As the country moves newlinetowards greening the smart Indian grid, energy reliability and grid resiliency newlineare the key concerns for the power industry. Several major blackouts in the newlinelast decade have brought utilities to focus on development of synchrophasor newlinebased Wide Area Monitoring, Protection and Control (WAMPAC) systems. newlineThe synchrophasor-based protection and control applications are still being newlineresearched upon pending comprehensive practical implementation.Lack of newlinepractical smart grid applications to ensure a high degree of reliability, selfconfiguration newlineand self-healing in Indian power system outweighs the tremendous newlineadvancement in envisaged technologies. A research on the various aspects newlinewhich makes our grid susceptible to cascading catastrophes, provides insight for newlineadequately addressing both industry and stakeholder interests and concerns. It newlinealso helps in finalizing on solutions for designing adaptive system protection newlineschemes for a resilient, reliable, green, smart grid. newlineThe two important aspects of grid operation are maintaining voltage profiles newlinewithin acceptable limits and ensuring synchronous operation of grid. A transient newlineinstability always jeopardizes these two stability categories. Therefore, the dissertation deals with power system stability assessment in purview of short-term newlinelarge disturbance voltage stability and transient angular instability. In this dissertation,grid monitoring and protection applications are developed using phase newlineangle separation measurement by strategically placed Phasor Measurement Units newlinefor self-healing of smart power grid. The historical 2003 Northeast Blackout newlineas well as 2011 Pacific Southwest