Improved Passive-Damped LCL Filter to Enhance Stability in Grid-Connected Voltage-Source Converters

Remus Narcis Beres, Xiongfei Wang, Frede Blaabjerg, Claus Leth Bak, Marco Liserre

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

This paper proposes an improved passive-damped LCL filter to be used as interface between the grid-connected voltage-source converters and the utility grid. The proposed filter replaces the LCL filter capacitor with a traditional C-type filter with the resonant circuit tuned in such a way that switching harmonics due to pulse width modulation are to be cancelled. Since the tuned circuit of the C-type filter suppresses the switching harmonics more effectively, the total inductance of the filter can be reduced. Additionally, the rating of the damping resistor is lower, compared with conventional passive-damped LCL filter. To verify the benefits of the proposed filter, a comparison with the conventional filter is made in terms of losses and ratings when both the filters are designed under the same condition.
Original languageEnglish
Title of host publicationProceedings of the 23rd International Conference and Exhibition on Electricity Distribution, CIRED 2015
Number of pages5
PublisherCIRED
Publication dateJun 2015
Publication statusPublished - Jun 2015
Event23rd International Conference and Exhibition on Electricity Distribution, CIRED 2015 - Lyon, France
Duration: 15 Jun 201518 Jun 2015

Conference

Conference23rd International Conference and Exhibition on Electricity Distribution, CIRED 2015
Country/TerritoryFrance
CityLyon
Period15/06/201518/06/2015

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