Title :
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
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;
Conference_Titel :
Mechatronic Science, Electric Engineering and Computer (MEC), 2011 International Conference on
Conference_Location :
Jilin
Print_ISBN :
978-1-61284-719-1
DOI :
10.1109/MEC.2011.6025788
