Analysis and assessment of microgrid stability using the Nu gap approach

Author

Alfares, Abdulgafor ; Sayed-Ahmed, Ahmed

Author_Institution

Dept. of Electr. & Comput. Eng., Marquette Univ., Milwaukee, WI, USA

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

2676

Lastpage

2683

Abstract

In this paper, a robust control system analysis of an isolated microgrid is introduced. This analysis is based on the concept of multiloop stability margin, and the Nu gap approach. This approach helps the system´s designer to ensure system stability under varying load conditions assuming a conventional cascaded control structure that employs an outer voltage control loop and an inner current control loop. Analysis and nonlinear detailed time domain simulation results are included.

Keywords

distributed power generation; electric current control; power distribution control; power system stability; robust control; time-domain analysis; voltage control; Nu gap approach; cascaded control structure; inner current control loop; isolated microgrid; microgrid stability; multiloop stability margin; outer voltage control loop; robust control system analysis; system stability; time domain simulation; varying load conditions; Closed loop systems; Load modeling; Mathematical model; Microgrids; Power system stability; Reactive power; Stability analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953760

Filename

6953760