Consensus-based Frequency and Voltage Regulation for Fully Inverter-based Islanded Microgrids

TL;DR

This paper introduces a distributed consensus-based control method for inverter-based microgrids that balances voltage regulation, frequency stability, and power sharing without needing prior network information.

Contribution

It presents a novel distributed control approach that improves reactive power sharing and offers tunable trade-offs among regulation and sharing objectives.

Findings

Achieves scalable control without prior network knowledge

Balances voltage regulation and power sharing effectively

Demonstrates flexible operation modes through simulations

Abstract

This paper proposes a new distributed consensus-based control method for voltage and frequency control of fully inverter-based islanded microgrids (MGs). The proposed method includes the active power sharing in voltage control to improve the reactive power sharing accuracy and thus generalizes some existing secondary frequency and voltage control methods. Firstly, frequency is regulated by distributed secondary frequency control. Secondly, voltage is regulated by distributed average voltage control and decentralized individual voltage control. It offers a tunable trade-off between voltage regulation, active, and reactive power sharing accuracy. Therefore, it avoids the abuse of sacrificing reactive power sharing accuracy for exact voltage regulation which is a common issue of existing methods. The proposed method is implemented in a distributed way that does not require a prior knowledge of the MG network structure and loads and hence can ensure scalability. Simulation results shows that the proposed controller achieves different compromise between the above three targets under different modes of operation.