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VENDORVIEWPOINT
Transducers provide foundation
for solar growth
Transducer manufacturers
need to work closely with
photovoltaic (PV) inverter
manufacturers to ensure
that they can continue to
support the latest trends in PV
technology, according to
Stephane Rollier, Product
Manager of transducer
33
manufacturer, LEM.
www
.solar
-pv-management.com
G
overnments and power utilities If PV systems are to realize their potential, they
worldwide anticipate that a must increase electrical efficiency to reduce the
Issue I 2010
significant proportion of their total energy provision cost-per-kilowatt. It is well known that the solar-cell-
will in future come from photovoltaic (PV) power as fabricators continue to strive for higher basic
the world demands that “green” renewable energy efficiencies in conversion of solar radiation into
sources replace fossil fuels to benefit the electrical power. One way that they are achieving
environment. This has led to a strong growth in this is by developing increasingly sophisticated
the market for photovoltaic (PV) solar cells. Even inverters to convert the DC panel output into the
with the current economic downturn, the market for AC supply required by the mains grid.
PV is expected to reach $34Bn in 2013.
Next generation inverters deliver more power, and
Design of the inverters to convert the DC output of offer higher efficiency as well as increased
the solar cells to grid-synchronised AC is intelligence and functionality by adding diagnostic
demanding, and becoming more so. PV inverters and other capabilities. One of the latest
must deliver peak efficiency, over a wide range of developments is multi-stringing: this maximises
power levels and operating conditions, while energy yield by connecting several strings, each
meeting strict safety requirements. The with its own maximum power-point tracking
performance of the inverter ultimately rests on (MPPT), to a single inverter.
precision measurements of basic electrical
quantities. Photovoltaic inverter manufacturers Although there are several inverter topologies on
need to work closely with transducer the market, the ones which are most commonly
manufacturers to ensure that they can continue to used in solar panels are those which use either a
support the latest trends in PV technology. high-frequency transformer, or use a transformer-
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