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An improved closed-loop droop control technique for higher utilization of power output capability in CCI
Lao K.W.1; Dai N.1; Sheng J.1
2019-07-01
Source PublicationInternational Journal of Electrical Power and Energy Systems
ISSN01420615
Volume109Pages:455-469
AbstractPower inverters play an important role in renewable energy integration, active power control and reactive power conditioning in microgrid. Droop control is widely used for power sharing among parallel connected converters. The capacitive-coupled inverter (CCI) has benefits for satisfactory performance with lower operation voltage. However, application of droop control in CCI suffers from a narrow controllable power output range, which indicates insufficient usage of CCI's power output capability. In this paper, an improved closed-loop droop control technique is developed to fully utilize the CCI's power output capability. This is archived by using the error as feedback signal for further modification of the input control signal. Different from conventional feedback control, challenges are present on dealing with the nonlinear characteristics of the system and the coupling between active and reactive power control. The idea will be thoroughly investigated, and both simulation as well as experimental results support that the performance of proposed closed-loop droop control is better than conventional one.
KeywordCapacitive-coupling inverters Droop control Power output control
DOI10.1016/j.ijepes.2019.02.034
URLView the original
Language英語
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Universidade de Macau
2.University of Texas at Austin
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GB/T 7714
Lao K.W.,Dai N.,Sheng J.. An improved closed-loop droop control technique for higher utilization of power output capability in CCI[J]. International Journal of Electrical Power and Energy Systems,2019,109:455-469.
APA Lao K.W.,Dai N.,&Sheng J..(2019).An improved closed-loop droop control technique for higher utilization of power output capability in CCI.International Journal of Electrical Power and Energy Systems,109,455-469.
MLA Lao K.W.,et al."An improved closed-loop droop control technique for higher utilization of power output capability in CCI".International Journal of Electrical Power and Energy Systems 109(2019):455-469.
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