Distributed generation in LV distribution networks: voltage and thermal constraints

The paper deals with the problem of assessing the amount of power that distributed generation (DG) can inject into LV distribution feeders without violating some technical constraints, such as the limitation posed by voltage constraints and lines thermal rating. The problem is studied following an analytical approach. The maximum value of the power that can be injected into the feeder by DG without violating the thermal constraints is analytically compared to the that which can be injected without violating the voltage constraints, in order to assess which of the two limitations is the most restrictive depending on the system operating conditions. The results obtained are also discussed by means of some numerical examples.