Sizing and Location Selection of Medium-Voltage Back-to-Back Converters
for DER-Dominated Distribution Systems
Abstract
Medium-voltage back-to-back (MVB2B) converters can connect two
distribution systems and quantifiably transfer power between them. This
function can enable the MVB2B converter to exchange distributed energy
resource (DER)-generated power between two systems and bring significant
value to enhancing distribution system DER adoption. Our previous work
analyzed and demonstrated the value the MVB2B converter can bring to DER
integration. As continuous work, this paper presents a methodology that
helps address the MVB2B converter sizing and location selection problem
in distribution systems with high DER penetrations. The proposed
methodology aims to address three critical problems for MVB2B converter
implementation in the real world: 1) which distribution systems are
better to be connected, 2) what converter size is appropriate for
connecting the distribution systems, and 3) where the optimal connection
points are in the systems for connecting the MVB2B converter. The
proposed methodology has been demonstrated by case studies that include
various scenarios involving distribution systems with different
dominated load types and high photovoltaic penetrations.