Multi-level control of grid-tied DC microgrids

Author

Xiao Jianfang ; Wang Peng ; Jin Chi ; Choo Fook Hoong

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

fYear

2013

fDate

8-11 Dec. 2013

Firstpage

1

Lastpage

6

Abstract

Increase of DC-compatible loads, popularity of distributed renewable energy sources (RESs) and development of power electronic converters are boosting the applications of DC microgrids (MGs). Multi-level control is proposed to realize the coordination among RESs, battery energy storages (BESs), DC loads and utility grid in distributed manner. System elements are prioritized to schedule different operation modes with bus voltage variation. Bus voltage band is divided into a few sub-regions so that operation could be realized in distributed manner. Droop control is implemented to realize power sharing among system elements in monitoring bus (MB) mode based on their capacities. System and individual converter response regarding variation of load power, RESs generation and operation modes transition between grid-tied and islanded are investigated. Lab-scale DC MG is developed to verify the feasibility and effectiveness of proposed control method.

Keywords

distributed power generation; power distribution control; power grids; renewable energy sources; voltage control; DC load; RES coordination; battery energy storage; bus voltage variation; distributed renewable energy source; droop control; grid-tied DC microgrids; monitoring bus mode; multilevel control; power electronic converters; power sharing; Batteries; Discharges (electric); Inductors; Power generation; Threshold voltage; Voltage control; DC microgrid; battery energy storages; grid-tied; multi-level control; solar PV;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2013 IEEE PES Asia-Pacific

Conference_Location

Kowloon

Type

conf

DOI

10.1109/APPEEC.2013.6837150

Filename

6837150