Preventive Control Strategy for an Island Power System That Considers System Security and Economics

Abstract

This work develops an under-frequency preventive control strategy for island power systems that are based on evaluating the initial one-hour-ahead operating status of the system and a real-time correction method. The developed preventive control system evaluates initial system flexibility using a forecast of net load, it includes a low-frequency preventive control strategy to ensure stable operation and to support a corrective process, and it includes an economic dispatch strategy to reduce operating costs. This system can be operated automatically, stably, and economically.