DOI:https://doi.org/10.1007/s40565-018-0477-2 |
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Photovoltaic-based DC microgrid with partial shading and fault tolerance |
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Net amount: 1176 |
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Author:
Carlos CORREA-BETANZO1, Hugo CALLEJA1, Carlos AGUILAR1,
Adolfo R. LOPEZ-NUNEZ1, Elı´as RODRIGUEZ2
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Author Affiliation:
1. Electronics Department, National Center for Research and
Development of Technology, 62490 Cuernavaca, Morelos,
Mexico
2. Electronics Department, Technological Institute of Celaya,
38010 Celaya, Guanajuato, Mexico
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Abstract: |
Partial shading is a common problem that affects
bus regulation in DC microgrids with several photovoltaic
(PV) modules as energy sources, as a result of reduced
solar irradiance reaching the modules. The problem can be
mitigated by incorporating batteries, but if they are not
included, appropriate control strategies must be used. This
paper presents a new approach in a PV-based DC microgrid,
which provides a high quality bus voltage regulation
in islanding mode, without being affected by partial
shading or problems associated with PV module connection
and disconnection. The solution proposed herein
ensures a proper voltage regulation without being affected
by problems such as failures in PV modules or mismatch
between them. Besides, it can help to prevent PV partial
shade stress by disconnecting the modules affected. A
further advantage of the approach is the flexibility to
connect more PV modules. The advantages of this
approach were verified in a 200 W prototype. |
Keywords: |
Photovoltaic, Microgrid, Partial shading, Fault,
Control strategy |
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Online Time:2019/03/08 |
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