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Franz Baumgartner, Prof. Dr. rer. nat. Dip. Ing.
Z
HAW Zurich University of Applied Sciences, School of Engineering
Progr
amme Director, BSc Energy and Environmental Engineering Institute of Energy
Systems and Fluid Engineering,
Head Photovoltaic Systems
CH-84
01 Winterthur, Technikumstrasse 9;
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Web: https://home.zhaw.ch/~bauf/
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Abstract
Commercially available PV mo
dule-level based power electronics currently exhibits an increasing market
share with global revenues of over 2 B$. Companies are promising performanc
e advantages of up to 20 % due to partial shading of individual modules and
optimal control of the DC/DC converters per solar module, compared to a si
ngle operating point of a conventional string inverter.
Measurements o
f such commercial PV module-level based power optimizers (each one fed by a
different power supply from an individual DC source which is emulating an
individually shaded solar module) performed at ZHAW laboratories, revealed
a significant deviation between the predicted performance improvement and o
bserved values.
Moreover, it will be discussed how DC output data of t
he individually shaded solar modules on the roof of a single-family home wi
th the shading by a dormer was determined and how measurement results in th
e laboratory were exploited to determine the average performance of each mo
dule.
The high complexity of different shading situations makes a gene
ral specification and characterisation for all existing situations impossib
le. Nevertheless, the measurement data and analyses obtained here, together
with a comparison of several publications on this topic, provide a helpful
overview for practical applications.
Finally, PROS and CONS of both P
V system setups (module-based vs string inverter based) are summarized. Thi
s also includes parameters such lifetime of the system components, service
cost and popular web-based illustrations of the aforementioned performance
values of such systems.
Speaker Bio:
Prof. Fran
z Baumgartner is head and program director of the bachelor's degree in Ener
gy and Environmental Engineering at the ZHAW and head of the Photovoltaic S
ystems Research Group at the Institute of Energy Systems at the SoE. His re
search activities in photovoltaics over the last three decades have include
d semiconductor electronics for thin-film solar cells, the development of s
pecial optoelectronic test systems for industrial manufacturers of tandem m
odules, mobile LED light sources for performance testing in the field and t
he measurement and analysis of the long-term performance of PV modules and
inverters, as well as various developments of components for the cost-domin
ant BOS components of solar systems, new mounting systems for solar modules
on steel cables and the integration of photovoltaic power into the power g
rid. For more than two decades, he has been active as Topic Organiser in th
e PV System area of the European PV Conferences and in several industries a
nd advisory bodies in Switzerland, such as Electrosuisse, Swisssolar and th
e Swiss Federal Office of Energy.
This event is supported by< strong> AIT Austrian Institute of Technology Gmbh and Graz University of Technology
If you are looking for more inform
ation about IEEE Austria IAS/PELS/IES Joint Chapter, pleas
e visit our webpage:
http://www.ieee-austria.org/index.php/chapters/41-ias-
pels-ies
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