Title :
Non ideal effect of current transformer and its influence on controller design of cascade multilevel STATCOM
Author :
Shi, Yanjun ; Liu, Bangyin ; Duan, Shanxu
Author_Institution :
State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
This paper discusses influences of using current transformer (CT) as feedback element in a cascade multilevel converter. First, a simplified transfer function model of CT is built by small signal test and the model parameter is verified by large signal experiment. Then, a cascade multilevel STATCOM with CT feedback is modeled and analyzed. Influences of CT on controller designing are discussed, along with solutions. Finally, experiments are performed to verify proposed method.
Keywords :
control system synthesis; current transformers; feedback; static VAr compensators; transfer functions; CT feedback; cascade multilevel STATCOM; cascade multilevel converter; controller design; current transformer; feedback element; model parameter; signal experiment; signal test; simplified transfer function model; Automatic voltage control; Computed tomography; Current transformers; Delay; Distributed power generation; Power electronics; Transfer functions; DC injection; cascade STATCOM; current transformer (CT);
Conference_Titel :
Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on
Conference_Location :
Aalborg
Print_ISBN :
978-1-4673-2021-4
Electronic_ISBN :
978-1-4673-2022-1
DOI :
10.1109/PEDG.2012.6254035
