Preventive control strategy for an island power system that considers system security and economics

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