Residential-Level Flexibility Aggregation for Voltage Control in Active Distribution Networks

This paper presents a bilevel control framework for voltage control in distribution networks. By leveraging explicit multiparametric optimization, the approach aggregates all local assets’ active and reactive power flexibility into a single flexibility chart. Augmented with user-defined pricing information, this aggregated flexibility is communicated to a central controller responsible for maintaining adequate voltage levels within the network at minimal cost. The paper also suggests a method to disaggregate setpoints received from the central controller among local assets. By aggregating pricing information and individual flexibility charts, this approach preserves the privacy of local prosumers. We validate this method on a low-voltage network of 44-buses by comparing it with some existing techniques.