Determining Critical Clearing Time in Transient Stability Assessment for Hybrid Power System

The hybrid arrangement of the power system is becoming famous in the latest days on account of its gain of sustainable combination to the classical strength grid. Hybrid power systems with renewable sources can provide potency, reliability, and security while reducing operational costs. It is advantageous to the analyst, even after a detailed solution has been performed. If the detailed stability case at the expected clearing time is unstable, the critical clearing time indicates the improvement necessary to achieve stability. A review of the hybrid power system and a comprehensive analysis of critical clearing time in transient stability assessment are performed and presented here. For elaborated analysis, IEEE 30 bus test power system has been adopted and revised for this distinct study. The modified hybrid power system subsist of the wind turbine, solar PV array with the energy storage mechanism and conventional diesel generators to study the critical clearing time for the transient stability assessment. The hybrid wind-solar-diesel wattage power system was sculptured in ETAP simulation software. The alteration in rotor angle of the machines after a three-phase fault is considered for various cases and the details investigation are presented here.