Solmetric PVA-600, Руководство пользователя

Страница: 46 / 91

4 Using the PVA-600 Software
4-10
Traces Tab
The Traces tab displays the most recent measurement results along with the predicted
shape of the I-V curve (if an advanced PV model is selected). Figure 12 is an example of
the Traces tab screen.
Figure 12. Traces tab
There are four main datasets displayed in the Traces screen:
1. I-V curve. This solid red curve displays the measured I-V points transmitted from the
I-V Measurement Unit. There are approximately 100 points on a typical curve. The
points are connected with line segments for display. Points below 0 V are not
displayed.
2. P-V curve. This solid blue curve displays the power available from the test string,
calculated from the I-V curve simply by multiplying I x V for each I-V point. The
yellow point simply indicates the maximum value of the measured P-V curve. It is
not the predicted maximum power value.
3. Model prediction points. The five purple I-V points are the predicted I-V values for
the five key points as defined by the Sandia or 5 Parameter performance model. If
the actual I-V curve goes through or near the predicted five points, then the array is
functioning as predicted.
4. The green shaded area indicates the specified DC voltage operating range for the
selected inverter. The left and right edges of the green shaded area represent the
lower and upper limits of the inverter‘s maximum power tracking range. The left
black line is the inverter starting voltage and the right black line is the maximum
input voltage.