Reducing network congestion in distribution networks with high DG penetration via network reconfiguration

In this paper the problem of network congestion due to high penetration of Distribution Generation (DG) in Distribution Networks (DNs) via network reconfiguration is examined. The problem in DNs is differentiated from the respective one in Transmission Networks (TNs), since the former is examined through a technical perspective while the latter through an economical orientated aspect. In this work, DN congestion is established as the problem of increased loading of the DN branches due to bi-directional power flow. The latter is expected to occur when the load demand of the DN is low and the power production of DG is high. Therefore, a Congestion Indicator Factor (CIF) is introduced in order to describe the tendency of DN towards congestion. Based on the CIF values, network reconfiguration is proposed as a real time solution regarding the online management of the DN in order to mitigate congestions. Results indicate that local reconfigurations could yield both congestion reduction and voltage profile improvement.