Impacts of Distributed WTGs on Distribution System Reliability

For environmental issues, the penetration of renewable distributed generations (DGs) will grow gradually in the future. It is a consensus that the emergence of DGs could improve the power supply reliability of distribution systems. However, this improvement is based on the output characteristics, operation manners as well as protection manners of DGs, which are new factors and not considered in traditional power system reliability evaluation method. Using Monte Carlo simulation, this paper analyzed the impacts of distributed wind turbine generations (WTGs) on distribution system reliability quantitatively. Both WTGs' output characteristic and operation manners were considered, and protection coordination issue was also discussed.