Consensus Control Algorithm for Voltage Control of Distribution Feeders

This study examines a control scheme for reducing interactions among voltage controllers in a microgrid and enhancing current sharing among distributed reactive power generators. To regulate the grid voltage and to control the reactive current injection sharing in low voltage (LV) distribution systems, a control approach based on current droop is proposed. The current sharing is enhanced by exchanging information with adjacent inverters. The proposed control algorithm uses localized information as well as the nearest neighbors' to collectively perform control actions. The key idea in this research is an adjacency correction term. This term uses the droop control as the initial value for information states. The research study also introduces a weighting method for the consensus algorithm. A mathematical model is also presented to conduct eigenvalue analysis for the interaction among any number of inverters in the network.