Performance evaluation of current control strategies in LCL-filtered high-power converters with low pulse ratios

Author

Jingkui Shi ; Jie Shen ; Qingyun Chen ; Schroder, Stephan ; Stagge, Hanno ; De Doncker, Rik W.

Author_Institution

GE Global Researchi, Shanghai, China

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

3234

Lastpage

3242

Abstract

In this paper, four current control strategies for voltage source PWM inverters with LCL-filter at extreme low pulse ratios (e.g. 80 Hz load frequency/600 Hz carrier frequency) are investigated. The system is a medium-voltage variable frequency drive (VFD) application with the power rating over 20 MW. The benefits and drawbacks of each scheme are summarized to provide a guideline for the current control loop design. The stability, dynamic response and the resonance damping effect of passive or active damping strategies are analyzed via a precise double-sided frequency modeling method. The system cost, algorithm complexity and dynamic performance are considered as well. Besides, analysis methodology based on the double-sided spectrum for such applications is demonstrated. Finally, the results have been validated in time-domain simulations.

Keywords

PWM invertors; damping; dynamic response; electric current control; power convertors; power filters; stability; variable speed drives; LCL-filter; current control loop design; double-sided frequency modeling; dynamic response; frequency 600 Hz; frequency 80 Hz; low pulse ratio; medium-voltage variable frequency drive; performance evaluation; resonance damping effect; voltage source PWM inverters; Bandwidth; Capacitors; Damping; Delays; Pulse width modulation; Stability analysis; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953840

Filename

6953840