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Virtual Impedance Control Scheme to Compensate for Voltage Harmonics with Accurate Harmonic Power Sharing in Islanded Microgrids

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Abstract
In case of voltage harmonic compensation at the point of common coupling (PCC) in islanded microgrids, it is important to share the harmonic load power correctly among the distributed generators (DGs) to use the DGs’ capacity effectively. In previous DG control schemes, it is impossible to satisfy the requirements of PCC voltage quality and accurate harmonic power sharing simultaneously with only a virtual impedance controller (VIC). In this paper, we propose an enhanced DG VIC to provide accurate harmonic power sharing along with voltage harmonic compensation in islanded microgrids. The proposed VIC is developed based on simple integral controllers with two controllable parts and no information about the feeder impedances or load currents. The control performance is theoretically analyzed using a small-signal state-pace model to evaluate the system dynamics and stability. The feasibility and effectiveness of the method are validated by simulated and experimental results.
Author(s)
이홍희호앙 반 뚜언
Issued Date
2021
Type
Article
Keyword
Distributed generator (DG)Harmonic analysisharmonic power sharingImpedanceislanded microgridMicrogridsPower harmonic filtersReactive powervirtual impedanceVoltage controlvoltage harmonic compensation
DOI
10.1109/JESTPE.2020.2983447
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9013
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_ieee_primary_9047934&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Virtual%20Impedance%20Control%20Scheme%20to%20Compensate%20for%20Voltage%20Harmonics%20with%20Accurate%20Harmonic%20Power%20Sharing%20in%20Islanded%20Microgrids&offset=0&pcAvailability=true
Publisher
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Location
미국
Language
영어
ISSN
2168-6777
Citation Volume
9
Citation Number
2
Citation Start Page
1682
Citation End Page
1695
Appears in Collections:
Engineering > Electrical engineering
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