21-11-2012, 11:54 AM
PROGRAMMABLE DC POWER SUPPLY SOLAR ARRAY SIMULATION MODEL 62150H600S/1000S
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The latest programmable solar array simulator
power supply 62150H-600S & 1000S released by
Chroma provides simulation of Voc (open circuit
voltage) up to 1000V and Isc (short circuit current)
up to 25A. The 62150H provides an industry
leading power density in a small 3U high package.
The solar array simulator is highly stable and has
a fast transient response design, which are both
advantageos to MPPT performance evaluation on
PV inverter devices.
The 62150H-600S/1000S has many unique advantages
including high speed & precision digitizing
measurement circuits with a 100kHz A/D, 25kHz
D/A controlled I-V curve and a digital filter
mechanism. It can simulate an I-V curve accurately
and response the mains ripple eect from the PV
inverter. In addition, the built-in SAS I-V model
in the standalone unit can easily program the
Voc, Isc, Vmp, and Imp parameters for I-V curve
simulation, without a PC controller.
The real solar array is influenced by various
weather conditions such as irradiation, temperature,
rain and shade by trees or clouds, which
will aect the I-V curve output. The 62150H-600S/
1000S is capable of storing up to 100 I-V curves
into the simulator memory, with a programmed
time interval range of 1-15,000 seconds. It can
simulate the I-V curve from the early morning to
nightfall for PV inverter testing or dynamic I-V
curve transient testing.
SOLAR ARRAY IV CURVE SIMULATION POWER SUPPLY
The Model 62150H-600S/1000S has a built in SAS model that can easily program the Voc, Isc, Vmp, Imp parameters to simulate different solar cell
materials I-V characteristic outputs with fast response time. Moreover, the TABLE mode is capable of saving a 128 point array of user programmed
voltages and currents via a remote interface. It can easily create a shadowed I-V curve and the I-V PROGRAM mode can save up to 100 I-V curves and
dwell time intervals (1-15,000s) in memory. These advantages provide steady repetitive control conditions required for PV Inverter design as well as for
verification testing.
SIMULATES DIFFERENT SOLAR CELL
MATERIALS IV CHARACTERISTIC
FILL FACTOR
The purpose of the PV inverter is to convert the dc
voltage (from solar array) to the ac power (utility). The
better a PV inverter can adapt to the various irradiation
& temperature conditions of sun, the more power
that can be fed into the utility grid over time. So, the
MPPT performance is a very important factor for PV
generation system. The model 62150H-600S/1000S
is capable of simulating different types of standard
crystalline, multi-crystalline and thin-film fill factor*
parameters to verify the MPPT tracking algorithm
mechanism and efficiency.
STATIC MPPT EFFICIENCY TESTING
The 62150H-600S DC power supply with solar array simulation can program the I-V curve through SAS mode and table mode via front panel or softpanel
easily and up to 100 I-V curves can be stored in the unit. The user can recall the I-V curve from 62150H-600S afterwards for testing and monitoring the
MPPT performance of PV inverter with the real-time tracking feature. The softpanel allows the user to set the duration for static MPPT efficiency testing.
Each curve test time should be set at between 60s-600s for best MPPT efficiency performance analysis.
DYNAMIC MPPT EFFICIENCY TESTING
The latest test standards EN50530, CGC/GF004 & Sandia have provided a procedure for testing patterns
of the dynamic MPPT efficiency of inverters, those standards can accelerate the MPP tracking algorithm
mechanism to the optimal for PV inverter manufactures. The advanced Dynamic MPPT Test function
complies with EN50530, CGC/GF004, Sandia test regulations and can be controlled via the graphical
softpanel by selecting CGC/GF004 or Sandia or EN50530 I-V mathematical expressions and test items.
This function simulates the irradiation intensity and temperature change of the I-V curve under actual
weather variations to test the PV inverter