Title :
Modeling, analysis and control of cascaded-multilevel converter-based STATCOM
Author :
Sirisukprasert, Sinroj ; Huang, Alex Qin ; Lai, Jih-Sheng
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Tech., Blacksburg, VA, USA
Abstract :
Modeling techniques for cascaded-multilevel converter-based STATCOM in abc and dqo coordinates are proposed. The simplified models for a balanced three-phase three-wire system in dqo are used in feedback controller design for cascaded seven-level converter-based STATCOM system. The development and analysis of the models are presented. Feedback control schemes are proposed to achieve a fast dynamic response as well as DC capacitor voltage balance. Computer simulation is performed to verify the accuracy of the models and performance of the controller. The simulation results show the consistency of the proposed models. In addition, the fast step responses in the order of subline cycle can be achieved.
Keywords :
cascade systems; controllers; digital simulation; feedback; power capacitors; power convertors; static VAr compensators; DC capacitor voltage balance; cascaded-multilevel converter-based STATCOM; computer simulation; fast dynamic response; feedback controller design; modeling technique; static VAr compensator; three-phase three-wire system; Automatic voltage control; Capacitors; Control systems; Feedback control; Flexible AC transmission systems; Insulated gate bipolar transistors; Reactive power; Thyristors; Topology; Valves;
Conference_Titel :
Power Engineering Society General Meeting, 2003, IEEE
Print_ISBN :
0-7803-7989-6
DOI :
10.1109/PES.2003.1271047
