Planning in transmission systems with a great level of penetration of distributed generation

This paper presents the methodology implemented in UTE for the transmission system planning based in probabilistic load flows considering the variability of distributed generation. The motivation arises to migrate from a deterministic to a probabilistic planning method, using for the analysis the software developed in UTE, EPPTRA. A new way to assess the 150 kV transmission lines chargeability is proposed, which allows a better use of the system capacity.