Issues for Power System Operation for Future Renewable Energy Penetration

—Robust Power System Security—

Abstract

A large amount of PV penetration may introduce uncertainties in the future power system planning and operations. This paper proposes the concept of “Robust Security (RS)” and “RS region” in order to investigate power system security in the presence of a large amount of uncertainties. The RS region is defined as the region of power system operation where the system is secure under uncertainties. It is shown that the region tends to shrink and disappear for a large amount of PV penetrations. Emerging problems are investigated concerned with security in future power systems.