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OPERATOR ’ S MENTAL MODEL OF ISLAND POWER SYSTEM

Operation of the electric power systems must fulfil economical demands while meeting the safety limits. Operating is influenced mainly by two factors — relation to safety and efficiency. Although they are contradictory, both aim to remove the unacceptable risk and determine the optimum of system output. The article describes the use of mental models for operating the process systems. A simple model of island operation is derived. With its help, an operator can perform adequate operational interventions and prevent a frequency collapse. Power plant behaviour analysis in P − f state space allows verification of the power plant control circuit.