Transaction areas for local voltage control in distribution networks

The paper presents a method to design transaction zones for commercial aggregation at the distribution level for voltage mitigation purpose. The core principle of this zoning is the nodal voltage sensitivity for active power variation. As the transaction zone delimits the elementary area for DER aggregation and separates the distinct roles of the network operator and of the aggregators, a fair nonarbitrary efficient zoning method is needed. The zoning problem is explored using a modified hierarchical clustering method, applied to a set of voltage sensitivity factors. The impact of this method is illustrated on a study case of a balanced MV distribution network.