Reliability Assessment of Distribution System with the Integration of Distributed Energy Resources and Electric Vehicle Charging Stations

Renewable energy sources play an important role in the future of electrical energy generation due to the reduction in existing fossil fuels. Solar energy and wind energy are renowned and easily accessible renewable energy sources. Connecting these sources to distribution system impacts reliability due to the unpredictable nature of the atmosphere. This paper presents a reliability assessment of distribution systems with renewable distributed energy resources (DER) units like wind turbine generators (WTG), electric storage systems (ESS), photovoltaic (PV) panels, and electric vehicle charging stations (EVCS). The stochastic characteristics of the DER sources and EVCS are analyzed by using the Markov model and the impact of the integration of DER sources into the distribution system is evaluated. The effects of DER and EVCS on the distribution system’s overall reliability and economy are assessed by using indices like System Average Interruption Frequency Index (SAIFI) and System Average Interruption Duration Index (SAIDI). Various scenarios are considered to evaluate the benefits of integrating WTG, ESS, PV, and EVCS into the distribution system in terms of reliability and stability. The results presented illustrate that the addition of DERs and EVCS into the distribution system improves its reliability and enhances resiliency.