A novel deterministic and probabilistic dynamic security assessment approach for isolated microgrids

Abstract

Isolated microgrids are prone to large frequency and voltage deviations, due to limited generation capacity, finite generation inertia, and possibly including large portions of dynamic loads. They require effective security-constrained power management methods, which operate the system optimally, while satisfying the security constraints. Region-based security assessment is popular for real-time security-constrained power management, thanks to its low calculation burden. This paper presents a systematic method to assess an approximation of the system deterministic or probabilistic (risk-based) Dynamic Secure Region (DSR) in isolated microgrids. To demonstrate how the method works, it was implemented on a notional isolated microgrid in an all-electric ship. The results showed the effectiveness of the proposed DSR assessment method.