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A ripple-based maximum power point tracking method for three-phase grid-connected photovoltaic inverter
Wang, Xian-Bo1; Yang, Zhi-Xin1; Wang, Jun-Xiao2
2018-01
Source PublicationTRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
ISSN0142-3312
Volume40Issue:2Pages:615-629
Abstract

As a prevailing solar energy utilization equipment, the three-phase grid-connected photovoltaic (PV) inverter is widely operated in partially shaded conditions and thus tends to generate multiple local maximum power points on its power-to-voltage and current-to-voltage characteristic curves. In order to identify the global maximum power point (GMPP) quickly and precisely, this paper proposes a ripple-based maximum power point tracking method. It aims to perform the optimization of tracking using the segmented scanning of DC-side voltage. An improved adaptive perturb and observe (AP&O) method is introduced to maximize the solar conversion and to increase working stability. This method applies a hybrid model of fixed and variable step-size perturbation to restrain the fluctuation of PV-side voltage. It belongs to a two-stage GMPP tracking method. That is, when environmental factors such as irradiance and temperature change quickly PV power fluctuates sharply. Correspondingly, the AP&O method tracks the latest maximum power point (MPP) with a large fixed-step voltage reference command. When the PV power fluctuates smoothly under a slow environmental change rate, the algorithm applies multiple small and variable step-size voltage perturbations to vibrate round the location of GMPP. Simulation and experimental results show that this method improves the efficiency of the PV inverter tracking performance. In addition, the stability of DC bus voltage is guaranteed, and the operational stability of the photovoltaic power generation system is improved.

KeywordPhotovoltaic Inverter Maximum Power Point Tracking Single-stage System Adaptive Perturb And Observe Partially Shaded Conditions
DOI10.1177/0142331216667544
URLView the original
Indexed BySCI
Language英语
WOS Research AreaAutomation & Control Systems ; Instruments & Instrumentation
WOS SubjectAutomation & Control Systems ; Instruments & Instrumentation
WOS IDWOS:000423313300023
PublisherSAGE PUBLICATIONS LTD
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorYang, Zhi-Xin
Affiliation1.Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, China
2.School of Automation, Southeast University, Nanjing, China
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Wang, Xian-Bo,Yang, Zhi-Xin,Wang, Jun-Xiao. A ripple-based maximum power point tracking method for three-phase grid-connected photovoltaic inverter[J]. TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL,2018,40(2):615-629.
APA Wang, Xian-Bo,Yang, Zhi-Xin,&Wang, Jun-Xiao.(2018).A ripple-based maximum power point tracking method for three-phase grid-connected photovoltaic inverter.TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL,40(2),615-629.
MLA Wang, Xian-Bo,et al."A ripple-based maximum power point tracking method for three-phase grid-connected photovoltaic inverter".TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL 40.2(2018):615-629.
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