Analysis and control of D-STATCOM under unbalanced voltage condition

Author

Yueqiu Wang ; Jie Tang ; Xionger Qiu

Author_Institution

Dept. of Electr. Eng., Shaoyang Univ., Shaoyang, China

fYear

2011

fDate

19-22 Aug. 2011

Firstpage

1623

Lastpage

1625

Abstract

The control methods and operation characteristics of D-STATCOM under unbalanced grid voltage are studied in this paper. Through methods of switching function and sequence network, the effects on voltage output of D STATCOM caused by grid voltage unbalance and its over current are analyzed. The performance of voltage output of D-STATCOM is improved with modified modulation method of switching function. And with negative-sequence feed-forward control strategy for restraining over current, the over current of D-STATCOM under grid voltage unbalance is effectively prevented, and the output performance of D-STATCOM inverter is improved. Simulation result shows the correctness and effectiveness of the conclusion and control strategy proposed in the paper.

Keywords

invertors; power supply quality; static VAr compensators; voltage control; D-STATCOM analysis; D-STATCOM control; D-STATCOM inverter; distribution static synchronous compensator; negative-sequence feed-forward control strategy; power quality problems; sequence network; switching function; unbalanced grid voltage condition; Automatic voltage control; Harmonic analysis; Inverters; Modulation; Performance evaluation; Switches; Control strategy; D-STATCOM; Operation analysis; Power grid voltage; Power quality;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronic Science, Electric Engineering and Computer (MEC), 2011 International Conference on

Conference_Location

Jilin

Print_ISBN

978-1-61284-719-1

Type

conf

DOI

10.1109/MEC.2011.6025788

Filename

6025788