Investigation of voltage stability in unbalanced distribution systems with DG using three-phase current injection based CPF

Author

Hung-Ming Chou ; Butler-Purry, Karen L.

Author_Institution

Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA

fYear

2014

fDate

27-31 July 2014

Firstpage

1

Lastpage

5

Abstract

Because of slow expansion of unbalanced distribution systems and fast growth of load, as well as the increased DG penetration level, voltage stability becomes an important issue for the proper operation of distribution systems. In this work, a three-phase current injection based continuation power flow was proposed and implemented to compute the three-phase PV curve of distribution systems. Different load models and load connections were considered, as well as DG in PQ or PV control mode with reactive power limit. Detailed implementation of the proposed method was described. IEEE 13-node test feeder was modeled and several case studies were performed to investigate the impact of various factors on the voltage stability of the unbalanced distribution system.

Keywords

distributed power generation; load flow control; power distribution control; power system stability; reactive power control; voltage control; CPF; DG penetration level; IEEE 13-node test feeder; PQ control mode; PV control mode; continuation power flow; reactive power control; three-phase PV curve; three-phase current injection; unbalanced distribution system; voltage stability; Jacobian matrices; Load modeling; Power system stability; Reactive power; Stability analysis; Thermal stability; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

PES General Meeting | Conference & Exposition, 2014 IEEE

Conference_Location

National Harbor, MD

Type

conf

DOI

10.1109/PESGM.2014.6939026

Filename

6939026