DocumentCode :
3009727
Title :
An Active Damping Method for Interface Converters of Distributed Generation
Author :
Lee, Tzung-Lin ; Li, Jian-Cheng
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-sen Univ.
fYear :
2009
fDate :
15-19 Feb. 2009
Firstpage :
1602
Lastpage :
1607
Abstract :
With development of sophisticated renewable energy technologies, paradigm shift of both power generation and power distribution is happening and happening fast. Compared with conventional power generation, renewable energy sources are installed to the utility grid in a distributed fashion, which may result in various power quality issues, such as unbalance voltage and harmonic voltage resonance. An active damping method for interface converters of distributed generation is presented in this paper. The converter operates as admittance for fundamental positive-sequence frequency, and various conductance for fundamental negative-sequence frequency and harmonic frequencies. The admittance command is dependent on generator available power and grid voltage regulation; the conductance commands are determined according to required suppression of unbalance voltage and harmonic voltage at the converter installation location. Based on the control, the converter can deliver real power, absorb or release reactive power for grid voltage regulation, and provide active damping for both unbalance voltage and harmonic voltage. Therefore, positive-sequence voltage, unbalance voltage, and voltage distortion of the grid would be simultaneously maintained at an allowable level as the converter delivers real power. Operation principles are explained, and computer simulations are provided to validate the effectiveness of the proposed approach.
Keywords :
distributed power generation; distribution networks; renewable energy sources; active damping method; admittance command; distributed generation; harmonic frequencies; harmonic voltage damping; interface converters; negative-sequence frequency; positive-sequence frequency; power distribution; power generation; renewable energy sources; unbalance voltage suppression; Admittance; Damping; Distributed control; Distributed power generation; Frequency conversion; Power distribution; Power generation; Power system harmonics; Renewable energy resources; Voltage control; Unbalance voltage suppression; distributed generation system; harmonic voltage damping;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
ISSN :
1048-2334
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
Type :
conf
DOI :
10.1109/APEC.2009.4802882
Filename :
4802882
Link To Document :
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