Scale-free Distributed Cooperative Voltage Control of Inverter-based Microgrids with General Time-varying Communication Graphs

TL;DR

This paper introduces a scale-free distributed voltage control method for inverter-based Microgrids that is resilient to communication failures, delays, and network changes, ensuring stable operation in dynamic conditions.

Contribution

A novel scale-free distributed cooperative controller that operates independently of network size and topology, enhancing Microgrid voltage regulation robustness.

Findings

Effective in handling communication failures and delays

Maintains stability with arbitrary network changes

Validated on CIGRE test system

Abstract

This paper presents a method for controlling the voltage of inverter-based Microgrids by proposing a new scale-free distributed cooperative controller. The communication network is modeled by a general time-varying graph which enhances the resilience of the proposed protocol against communication link failure, data packet loss, and fast plug and play operation in the presence of arbitrarily communication delays. The proposed scale-free distributed cooperative controller is independent of any information about the communication system and the size of the network (i.e., the number of distributed generators). The stability analysis of the proposed protocol is provided. The proposed method is simulated on the CIGRE medium voltage Microgrid test system. The simulation results demonstrate the feasibility of the proposed scale-free distributed nonlinear protocol for regulating the voltage of Microgrids in presence of communication failures, data packet loss, noise, and degradation.