Impacts of Distributed Energy Resources on the Grid Transient Stability: A Case Study of Namibia

The development of Distributed Energy Resources and their integration in the distribution system is on the rise worldwide. This has been necessitated by the need for an environment friendly sustainable growth. However, an increased penetration of distributed generators(DG) into the grid has an impact on the integrity, reliability and stability of the grid. In this paper, the impacts of increased penetration of DG on faults on the grid was analysed. The was carried out by modelling and simulating Namibian grid in DigSILENT Power Factory software. The analysis was done at 0% DG penetration level and at maximum DG penetration level of 71.76% under fault condition. The results showed that DG units has potential to enhance system performance, in addition increased penetration of DG units reduces the magnitude of maximum rotor angle deviation hence enhancing transient stability of the grid.