Emergency control of power system frequency using flywheel energy injection

The automatic disconnection of generating plant under fault conditions presents special problems in isolated small to medium sized power systems. To give an insight into this specific area of power system dynamics, a relatively simple but sufficiently accurate power system model is proposed, to examine the response of power system frequency and demand to an unscheduled generation outage. Using results obtained from this investigation, it is proposed to utilise a flywheel energy storage and retrieval scheme of modest capacity for reduction of load curtailment and replacement of conventional spinning reserve-thus contributing to a reduction of the most significant costs associated with unscheduled power system outages