Reliability analysis of power system using a frequency domain analytical method

Abstract

Today's power system is becoming more dependent on distributed energy resources as well as communication and control technologies empowering higher grid reliability, resiliency, and en­ergy efficiency. Along with these modifications, precise calculation of reliability, at both equipment and system level, plays an essential role to determine the future power grid dependability and identify the areas where the reliability can be improved. The reliability of power system has long been calculated using different analytical and simulation-based methods. However, due to the large scale of power systems interconnecting thousands of electrical equipment and probabilistic nature of the failures, reliability assessment meth­ods for electrical systems usually involve many assumptions and simplifications. This paper proposes a new analytical reliability assessment method based on Laplace Transform which calculates the reliability indices more accurately. The method and results will be explained using different case studies, such as a wind turbine and a distribution power system.