Solmetric PVA-1000S, Руководство пользователя

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3 Software Overview
3-1
3 Software Overview
Using Projects
The PV Analyzer stores all of your setup information and measurement results in a
specialized Windows file type file type called a Project file. The PV Analyzer software
guides you through the steps of creating a Project for a particular array.
All PV modules within a Project must be of the same type and must be mounted at the
same azimuth. Often a site will have multiple PV arrays with a mix of different modules
and azimuths. To accommodate these differences, create a separate Project for each case.
To save time, you can copy and paste your first Project file, re-name it, and edit just those
features that are different.
The PVA's have a special feature for measuring the performance of strings in horizontal
single-axis tracking systems. The software is able to automatically 'flip', at solar noon,
from a morning azimuth to an afternoon azimuth. SolSensor reports the tilt with each
measurement.
NOTE To preserve software responsiveness for large PV sites, consider creating multiple
projects. For example, in a 50 MW project, create a separate Project for each pad or each
inverter. This will also improve the speed of the Data Analysis Tool that you will use to
analyze your data.
NOTE Be sure that your PC is set to the correct date and time, and that the time zone and
daylight savings setting are correct. These parameters are used to calculate the position of
the sun at the exact moment of the I-V curve measurement. This allows the software to
calculate the angle of incidence of the direct sunlight and use that information to optimize
the accuracy of irradiance sensor and the PV model.
Errors in these settings will
introduce errors in the effective irradiance measurement and in the predicted
performance of the PV modules under test, and as a result will also cause errors in
the Performance Factor
(measured maximum power / predicted maximum power). It’s
especially important to be aware of this requirement if you are traveling between time
zones with your equipment.
I-V measurements are automatically "stamped" with the date and time at the instant the
measurement is performed.
If your computer is connected to the internet, each time you open the New Project
Wizard, the PVA PC software checks a web time server for the correct Universal Time