Incorporating generator scheduling in composite power system well-being analysis

The well-being analysis of a composite power system is reasonably well known among power systems planners and engineers. In this method, a composite power system, which contains generation and transmission facilities, can be divided into several states in terms of the degree to which adequacy and security constraints are satisfied. The resulting indices, which are the probabilities of the system being in the healthy, marginal and at risk state as designated by deterministic criteria can provide important and intuitively interpretable information for system planning and operations. The healthy state probability provides an extra index for system planners or designers to decide whether or not the power system is capable, based on the deterministic criteria, to withstand unplanned outages of system components without violation of specified constraints. Together with the at risk and marginal state probability, the well-being analysis provides a more comprehensive view of a bulk power system´s reliability. This paper presents various studies performed on the IEEE-RTS network using wellbeing analysis. Also, the maintenance of generators has to be performed with careful planning. The well-being indices provide an extra criterion for the choice of maintenance scheduling. Studies were performed to identify the effects of different maintenance schedules on the annualized well-being indices using a hypothetical load model