Enhanced Power Management System for Droop Control in a Grid Connected DC Microgrid

Author(s):Show less -

dos Santos Neto, Pedro Jose ; Silveira, Joao Pedro C. ; Barros, Tarcio Andre dos S. ; Ruppert Filho, Ernesto ; Vasquez, Juan Carlos ; Guerrero, Josep M. ; Batschauer, AL ; Filho, AJS ; Rech, C ; Brandao, DI ; Martins, DC ; Tedeschi, E ; Santos, EC ; Marafao, FP ; Antunes, FLM ; Goncalves, FAS ; Neves, FAD ; Braga, HAC ; Pinto, JOP ; Duarte, J ; Matakas, L ; Barreto, LHSC ; Heldwein, ML ; Correa, MBD ; Mattavelli, P ; Barbosa, PG ; Magalhaes, RD ; Machado, RQ ; Madawala, U

• Document type: Journal article
• Source: 2019 IEEE 15TH BRAZILIAN POWER ELECTRONICS CONFERENCE AND 5TH IEEE SOUTHERN POWER ELECTRONICS CONFERENCE (COBEP/SPEC); v. N/A, p. 6-pg., 2019-01-01.

Abstract

This paper presents an enhanced power management system for a DC microgrid operating in the grid connected mode using droop control. The proposed power management technique acts over the energy storage system (ESS) regulating the power flow according to the state of charge of the battery bank. A voltage source converter (VSC) is applied to interface the DC microgrid and the AC utility grid. Since droop control is applied, no communication between the VSC and the energy storage unity is required. Customer loads and distributed generation are considered as part of the DC microgrid. The droop characteristic of the energy management system is modified to force the ESS to operate autonomously, providing the energy required by the load, while the AC grid only supplies or absorbs power during deficit or surplus of energy. A comparison between the proposed method and a conventional power management for droop control is performed. Simulation results indicate that the proposed system leads to a better control over the DC microgrid power flow, in a smooth DC bus voltage variation and in a better ESS state of charge regulation. (AU)

• 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
• 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: 16/08645-9 - Interdisciplinary research activities in electric smart grids
• Grantee: João Bosco Ribeiro do Val
• Support Opportunities: Research Projects - Thematic Grants