DSP Selection Guide
DSP Selection Guide
DSP Selection Guide
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System Solutions<br />
Industrial<br />
11<br />
➔<br />
Solar Inverter System Solutions<br />
Get additional information at: www.ti.com/solar<br />
Solar Inverter Overview<br />
There is an emerging concern for future<br />
access to energy at the worldwide level.<br />
Alternative solutions to fossil fuels have<br />
been investigated and are moving to fully<br />
industrialized production processes in<br />
regions across the globe.<br />
One of the most widespread alternative<br />
energy sources is solar, and many innovative<br />
companies have decided to focus<br />
their research and development, as well<br />
as manufacturing activities, on the delivery<br />
of photo-voltaic (PV) systems. This<br />
includes high-performance solar inverters<br />
for electrical utilities, commercial buildings<br />
and individual residences.<br />
The inverter is a critical part of the entire<br />
solar energy system. It performs the conversion<br />
of the variable DC voltage output<br />
of the PV cells into a clean, sinusoidal<br />
50- or 60-Hz current suitable for supplying<br />
the commercial electrical grid or local<br />
electrical networks.<br />
The TMS320C2000 digital signal controller<br />
platform is the best response to<br />
the real-time challenges of the many possible<br />
implementations of solar inverters.<br />
The 32-bit CPU of the TMS320C28x<br />
core – running at a maximum frequency<br />
of 150 MHz – effectively executes the<br />
very precise algorithms required to operate<br />
the panels at their maximum power<br />
point, and thus ensure the highest efficiency<br />
of the power conversion, even in<br />
the most severe and variable conditions.<br />
The drive of the main bridge of the<br />
DC/AC converter is performed by the<br />
highly flexible PWM modules of the<br />
C2000 devices, and is combined with<br />
the use of the on-chip, high-speed 12-bit<br />
ADC, to perform the current and voltage<br />
regulation required to achieve the most<br />
regular sinusoidal waveform.<br />
AC Grid<br />
Power Stage<br />
• Cell voltage<br />
• Cell temperature<br />
• Ambient temperature<br />
• Metering counter<br />
A/D Converter<br />
DC-DC<br />
Conversion<br />
DC-DC<br />
Conversion<br />
DC-AC<br />
Conversion<br />
PWM<br />
Metering<br />
Housekeeping<br />
Control Functions<br />
C2000 Controller<br />
CAN /<br />
Serial<br />
Software<br />
Solar Inverter Example<br />
Communications<br />
Texas Instruments 1Q 2007<br />
<strong>DSP</strong> <strong>Selection</strong> <strong>Guide</strong>
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