Analysis of System Inertia due to Reduction of Operational Synchronous Machines

Abstract

The massive deployment of PV and wind, which provides decarbonized energy supply, bring about various additional challenges. Among the challenges, the reduction of operational capacity of synchronous machines in a power system induce reduced inertial of a power system. With the reduced system inertia, the system frequency deviates faster and more largely and the deviation sometimes results in instability of a power system operation. In this paper, based on the various scenarios including PV penetration, load dispatch operation types, we analyze the system inertia of the future Japanese power system by identifying operational capacity of synchronous generator machines through a demand and supply simulation of the Japanese power system, to find the characteristics of the reduction of the system inertial under different scenarios and conditions.