Power-synchronization loop for vector current control of VSC-HVDC connected to weak system

Author

Minxiao Han ; Lingfei Xiong ; Lei Wan

Author_Institution

Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China

fYear

2012

fDate

Oct. 30 2012-Nov. 2 2012

Firstpage

1

Lastpage

5

Abstract

Effective control of VSC-HVDC connected to weak system is one of the important issues related to the reliable operation of the entire DC system. Firstly, the operation principles of the traditional Vector Current Control are described, and the mechanism of its failure in control due to PLL can´t get phase-locked accurately in the transient process when connected to weak system. Then an integrated method combining Power-Synchronization Loop and Vector Current Control is proposed as the control method for VSC that connected to weak system. At last, a VSC-MTDC model with three terminals (one terminal connected to weak system) established base on PSCAD/EMTDC is used to demonstrate the better transient performance of proposed method compared to the traditional Vector Current Control.

Keywords

HVDC power convertors; electric current control; failure analysis; phase locked loops; DC system; PLL; PSCAD-EMTDC; VSC-HVDC; VSC-MTDC model; failure analysis; phase-locked control; power-synchronization loop; vector current control; weak system; EMTDC; Indexes; PSCAD; Phase locked loops; Vectors; PLL; Power-Synchronization Loop; VSC-HVDC; Vector Current Control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology (POWERCON), 2012 IEEE International Conference on

Conference_Location

Auckland

Print_ISBN

978-1-4673-2868-5

Type

conf

DOI

10.1109/PowerCon.2012.6401313

Filename

6401313