A hybrid derivative feedback control for VSG-based VSC to improve dynamic response characteristic

Author

Fang Liu ; Xing Zhang ; Rongliang Shi ; Haizhen Xu ; Lei Tao

Author_Institution

Sch. of Electr. Eng. & Autom., Hefei Univ. of Technol., Hefei, China

fYear

2014

fDate

5-8 Nov. 2014

Firstpage

1203

Lastpage

1206

Abstract

With high power Virtual Synchronous Generator (VSG)-based Voltage Source Converter (VSC) and low switching frequency, time delay has become a big issue affecting VSC stability and dynamic response in islanded mode. In this paper, effect of time delay on output impedance is analyzed and a hybrid derivative feedback control is proposed to improve system stability and dynamic response. First step, derivative feedback compensator of control variable is adopted to improve system stability and then, derivative feedback equation of state variable is adopted to improve dynamic response. Time delay is also discussed and compensated to improve dynamic response furthermore. The control method is verified by both analytical model, time simulations and experiment results.

Keywords

delays; distributed power generation; dynamic response; electric impedance; power system control; power system stability; switching convertors; synchronous generators; VSG-based VSC; derivative feedback equation; dynamic response characteristic improvement; high power virtual synchronous generator-based voltage source converter; hybrid derivative feedback compensator control variable; islanded mode; low switching frequency; output impedance; power system stability improvement; time delay; Delay effects; Feedback control; Impedance; Power system stability; Pulse width modulation; Stability analysis; Voltage control; VSG; dynamic response; hybrid derivative feedback control; time delay;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Application Conference and Exposition (PEAC), 2014 International

Conference_Location

Shanghai

Type

conf

DOI

10.1109/PEAC.2014.7038032

Filename

7038032