Frequency Stability for an Island Power System: Developing an Intelligent Preventive-Corrective Control Mechanism for an Offshore Location

This article develops an intelligent underfrequency security control mechanism for offshore island power systems, for which frequency stability is a major concern. The security control mechanism is divided into two main categories: preventive control and corrective control. The developed preventive?corrective control system involves modules for forecasting the frequency nadir, the rate of change of frequency, intelligent load shedding, and protection strategies. The forecasts assist in the rescheduling of diesel generators, wind power curtailment, or intelligent underfrequency load shedding (UFLS). An actual island power system is considered to elucidate the feasibility of the proposed control system. The results of this study provide system operators with a valuable reference for preventive dispatch and the planning of load shedding.