NDLI: Photovoltaic grid-connected control system based on multi-peak maximum power point tracking algorithm

Content Provider	IEEE Xplore Digital Library
Author	Zhang Yuan-ming
Copyright Year	2012
Description	Author affiliation: State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology, Automation Research and Design Institute of Metallurgical Industry, Beijing 100071 (Zhang Yuan-ming)
Abstract	There exists a strongly nonlinear relationship between photovoltaic array and the ambient temperature and irradiance. It will result in an unstable output power. When the array is partially shaded, power-voltage characteristic curve has multiple peaks and the traditional MPPT(maximum power point tracking) methods lose their effectiveness. This paper presents an incremental conductance method based on voltage scanning. Firstly the peak where the maximum power point locates is acquired through voltage scanning Then incremental conductance method is used to search the more accurate maximum power point using the voltage acquired before. Lastly the maximum-power-point voltage and reference current can be located. Reference current is directly used in grid connecting control. With PI controller, we can decouple the LC grid-connected current under synchronous rotating coordinate system. The inverter output current gets in accord with the reference current and its phase gets identical with the phase of grid voltage. Unity power factor is achieved. Simulation results verify the described MPPT method's effectiveness and the stability of the grid control system.
Starting Page	6762
Ending Page	6767
File Size	341169
Page Count	6
File Format	PDF
ISBN	9781467325813
ISSN	21612927
e-ISBN	9789881563811
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Chinese Assoc of Automati
Subject Keyword	Space vector pulse width modulation Photovoltaic systems Industries voltage scanning Automation MPPT multiple peaks Control systems decouple
Content Type	Text
Resource Type	Article

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