Reliability Assessment in Transmission Considering Intermittent Energy Resources

Current power systems face different types of problems, such as the balance in the adequacy of the resources, security, grid reliability, complementarity, resilience, stability and economic efficiency, to name a few. This paper deals with the problems in reliability imposed onto the grid by power generation with intermittent energy resources, i.e. wind and solar energy. Power systems with high penetration grid-connected power generators that use an energy source which is not available because of its random nature, are addressed here in terms of reliability for the grid. This paper presents the results of a study done on a reliability test power system that takes into account, first how the system behaves regarding reliability indexes with generation from conventional energy resources (Fossil, Nuclear and Hydropower), Then the system is presented introducing wind power and solar power with an elevated degree of penetration in the grid. The evaluation of the system was performed using computational modelling and can potentially be applied to other test systems.