TRANSIENT STABILITY ANALYSIS OFAN INTERCONNECTED ELECTRICAL POWER SYSTEM

Abstract

Since solar power systems are connected to the grid using technologies other than those used by traditional power systems, the increased penetration of solar energy into the traditional power grid may modify certain of its transitory features. Particularly, the increased use of non-synchronous generators has an impact on the Critical Clearing Time (CCT), which is crucial for protective system performance during turbulent periods. In a typical IEEE 9 bus test system, this work examines the transient stability analysis of a power system and the effects of photovoltaic (PV) penetration on it. The simulation software ETAP is used to prepare the Simulink model for the transient stability of the IEEE 9 bus test system. The study takes into account three-phase faults, and several simulations are used to examine the stability of the rotor angle. Critical clearing time is used to compare the transient stability in various scenarios, such as with and without PV in the system, and is used as an index to examine the transient stability analysis of the IEEE 9 bus test system for base case. It has been discovered that transient stability depends on the fault's duration, position, and power. While it has improved in some places, the integration of PV into the system has decreased the transient stability of the power supply at important spots.