Distributed control for state‐of‐charge balance and load voltage regulation in DC microgrids with clustered generations

Abstract

In this paper, the issue of state-of-charge balance and load voltage regulation of DC microgrids used in solar-powered vehicles is investigated. The system consists of multiple distributed generation units, each of which is equipped with photovoltaic cells and energy storage systems. Based on the information shared among the neighbors, a single-layered distributed control strategy is proposed to solve two aspects of the problem simultaneously. Rigorous analysis of the closed-loop system ensures stability and the effectiveness of the control strategy.The power constraints of each distributed generation unit are taken into consideration so that safety and applicability are guaranteed. To avoid the cycling of the batteries, the state-of-charge balance is achieved by regulating the output power feeding a common load, promoting efficiency and battery life. The proposed controller operates without any knowledge about load, line impedance, and global information of communication network, and consequently possesses the capability of plug-and-play. Finally, the effectiveness and applicability are illustrated by an example from the Sky-Sailor project.

Time delay margin for islanded microgrid with parameter uncertainty using fractional order proportional‐integral‐derivative controller

“…Recently, according to the environmental problems and the reduction of fossil fuels, the governments have executed strict policies to reduce the greenhouse gas emissions by increasing the penetration level of the renewable energy sources (RESs) such as the photovoltaic panels (PVs) and the wind turbine generators (WTGs) [1][2][3][4][5][6][7][8]. But the fluctuating nature of the RESs cause new problems and may endanger the power system stability, which means innovating methods for managing these units are necessary [9,10].…”

Distributed cooperative control of multi‐converter systems via networks

“…Alternatively, decentralized control schemes for DMCSs can overcome this drawback. These mostly include droop control [9, 10], sensorless control [11], and distributed cooperative control [12, 13]. Among them, the distributed cooperative control scheme is popular in the domain of controllers for power electronics with the rapid advancement of network techniques and multi‐agent system (MAS) theory [14, 15].…”