Abstract
The objective of the paper is to develop the reliability importance factors which could identify the plants, which more or less contribute to the increased or decreased power system reliability. One group of importance factors could identify the plants, which with their increased availability would notably increase the power system reliability The other group of the importance factors could identify the plants, which with their reduced availability would notably reduce the power system reliability. The importance factors have been developed. An example of regional power system was considered for the case study. The results identify the power plants which are more susceptible to increase of the loss of load expectation and thus to decreasing of the power system reliability, if their availability is reduced. Similarly, the results identify the power plants which are more susceptible to decreasing of the loss of load expectation and thus to increase of the power system reliability, if their availability is increased. The lists of important factors can serve as a standpoint for inclusion of the power system reliability role within the power system to the planning activities. The lists of importance factors can represent the standpoint for the power system operator to reward the improvement of the power plant availability or to penalize the reduced power plant availability
Highlights
The power system planning is performed considering the parameters related to the investment costs of power plants, considering the parameters related to the operational costs, considering the parameters, which penalise the impact to the environment, but the reliability of the power plants is not normally considered
The classical method of loss of load expectation is selected as the starting point for the development of reliability importance factors, which would rank the power plants according to their reliability performance in the power system [3, 9]
The objective related to development of the reliability importance factors for power plants in the system has been reached
Summary
The power system planning is performed considering the parameters related to the investment costs of power plants, considering the parameters related to the operational costs, considering the parameters, which penalise the impact to the environment, but the reliability of the power plants is not normally considered. The classical method of loss of load expectation is selected as the starting point for the development of reliability importance factors, which would rank the power plants according to their reliability performance in the power system [3, 9]. The objective of the paper is to develop the reliability importance factors for the power plants in the power system based on evaluation of the loss of load expectation. One group of the importance factors could identify the plants, which increased availability would notably or significantly increase the power system reliability. The other group of the importance factors could identify the plants, which reduced availability would notably or significantly reduce the power system reliability
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