Power Management Strategy Based on Virtual Inertia for DC Microgrids

Author(s)

Neto, Pedro Jose dos Santos ^[1] ; Barros, Tarcio Andre dos Santos ^[2] ; Silveira, Joao Pedro Carvalho ^[1] ; Ruppert Filho, Ernesto ^[1] ; Vasquez, Juan Carlos ^[3] ; Guerrero, Josep M. ^[3]

Affiliation

^[1] Univ Estadual Campinas, Sch Elect & Comp Engn, BR-13083852 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Fac Mech Engn, BR-13083860 Sao Paulo - Brazil

^[3] Aalborg Univ, Ctr Res Microgrids CROM, Dept Energy Technol, DK-9220 Aalborg - Denmark

• Document type: Journal article
• Source: IEEE TRANSACTIONS ON POWER ELECTRONICS; v. 35, n. 11, p. 12472-12485, NOV 2020.
• Web of Science Citations: 0

Abstract

This article presents a power management strategy (PMS) to control the power flow in a dc microgrid operating in the grid-connected mode. The microgrid model is composed of the ac utility grid interfaced with a voltage source inverter operating as a grid-forming converter (VSC), an energy storage system (ESS) formed by a battery bank and a bidirectional dc-dc converter operating as a grid-supporting unit, a distributed generation acting as a grid-feeding unit, and the customer loads with strict voltage regulation. The power management technique applies a virtual inertia concept together with a state of charge-based management function to regulate the charging and discharging process of the battery bank according to the dc microgrid power flow. Thus, high-rate peaks of power are avoided, which improves the ESS life cycle. With the proposed PMS, an autonomous power flow is achieved inside the dc microgrid, while the ac utility grid focuses exclusively upon forming the dc bus and processing the surplus or shortage of power. In addition, the proposed strategy simplifies the communication link between the grid inverter and the ESS, since the VSC power is the sole information exchanged. The experimental results show that the proposed PMS is reliable, leading to high ESS performance and power flow control within the dc microgrid, without degrading the dc bus voltage. (AU)

• FAPESP's process: 17/21640-9 - Study and development of control and drive techniques for the use of switched reluctance machines in electric vehicles.
• Grantee: Tárcio André dos Santos Barros
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/08645-9 - Interdisciplinary research activities in electric smart grids
• Grantee: João Bosco Ribeiro do Val
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/22076-2 - Study and implementation of the control and energetic management of a DC microgrid using the switched reluctance generator
• Grantee: Pedro Jose dos Santos Neto
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 17/21087-8 - Study and implementation of the control and the energetic management of a DC microgrid, with wind energy conversion system, using the switched reluctance generator.
• Grantee: Pedro Jose dos Santos Neto
• Support Opportunities: Scholarships in Brazil - Doctorate