Distributed generation and its effect on distribution network system

Along with durative development of Shanghai and shortage of electric power, distributed generation (DG) is used to eliminate the contradiction between peak and valley. It has a great impact on node voltage, power quality, system protection, supplying reliability and short circuit of distribution network, while the degree of impact is closely related with the location and capability of DG. It is also an essential challenge to traditional distribution network planning, as planners should consider more when selecting the best project.