Title :
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
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;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2014 IEEE
Conference_Location :
Pittsburgh, PA
DOI :
10.1109/ECCE.2014.6953840
