Impact of embedded generation on the voltage quality of distribution networks

The increasing concerns related to the global warming process determined the shifting towards the use of distributed generation (DG) designed to meet the environmental restrictions. The increasing penetration rate for the DG in the energy systems is raising technical and non technical problems that must be quickly solved in order to deeply exploit the opportunities and benefits offered by the DG technologies. In this paper, the analysis of the impact of distributed generation units on the voltage quality in a 6 kV medium voltage network is conducted. The distributed generation units may require an inverter before their interconnection to the mains. Thus, these converters can produce harmonics that propagate in the distribution network. The case studies are conducted using the software package ATP- EMTP on an existing 6 kV network.