Control of VSC connected to the grid through LCL-filter to achieve balanced currents

Author

Magueed, Fainan A. ; Svensson, Jan

Author_Institution

Dept. of Energy & Environ., Chalmers Univ. of Technol., Goteborg, Sweden

Volume

1

fYear

2005

fDate

2-6 Oct. 2005

Firstpage

572

Abstract

Grid-connected voltage source converters (VSCs) are the heart of many applications with power quality concerns due to their reactive power controllability. However, the major drawback is their sensitivity to grid disturbances. Moreover, when VSCs are used in DG applications, voltage unbalance may be intolerant. The current protection may trip due to current unbalance or due to overcurrent. In this paper, a vector current controller for VSC connected to the grid through LCL-filter is developed with the main focus on producing symmetrical and balanced currents in case of unbalanced voltage dips. Implementing this controller helps the VSC system not to trip during voltage dips.

Keywords

controllability; distributed power generation; overcurrent protection; power convertors; power filters; power supply quality; power system control; power system faults; power system protection; reactive power control; sensitivity; DG application; LCL-filter; VSC control; grid disturbance; overcurrent; power quality; protection vector current controller; reactive power controllability; sensitivity; voltage dip; voltage source converter control; Control systems; Controllability; Converters; Heart; Power conversion; Power quality; Power system protection; Reactive power control; Voltage control; Voltage fluctuations;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2005. Fourtieth IAS Annual Meeting. Conference Record of the 2005

ISSN

0197-2618

Print_ISBN

0-7803-9208-6

Type

conf

DOI

10.1109/IAS.2005.1518364

Filename

1518364