A Novel Asymmetric Distributed Voltage Regulation Scheme to Enhance the Utilization of Distributed Energy Resources

Passive voltage regulation in distribution grids using distributed energy resources (DERs) is becoming the standard for feeder voltage management in both under-voltage and over-voltage scenarios. Their simple control, ease of implementation, and fast response make them ideal for distribution feeders with high-DER penetration. This paper proposes a novel distributed voltage control for DERs based on the voltage at the point of com-mon coupling, inverter rating, and operating active power. The proposed control is designed to utilize feeder inverters efficiently to reduce the burden on the inverters in both under-voltage and over-voltage operations and increase the fairness in reactive power (Q) support in over-voltage operations. The proposed control is implemented in static and dynamic simulations of a real feeder to validate the performance. Results for the under-voltage scenario are also presented in the proposal.