Abstract
The testing system, which is based on photovoltaic cell module using virtual instrument,
provides stimulated sunlight for photovoltaic equipment by using lights and filters. A
parabolic launch device succeeds in stimulating solar light of high uniformity so that the
steady temperature will have no influence on the test. When tested, the ambient temperature
should be 25℃. The photovoltaic cell performance testing platform is established to test
parameters of the photovoltaic cell performance, making use of the virtual instrument
technology and data collection card with multi-function and other equipment.
This paper, on the basis of analysis the task, technical index and system function,
designs an overall scheme of the system and makes a detailed introduction of the whole
implementation process of the system from two aspects of hardware and software. Firstly, it
introduces the principle of the solar power generation and the selection of data acquisition
card. The use of NI Company's LabVIEW, by controling the data acquisition card, can make
it possible to collect, display, and store the solar battery voltage, to analyse and process the
measured data. Its ultimate purpose is to achieve power sub-file and test if the testing
components meet those requirements. Finally, the interface that has been designed will be
debugged. Although there is no real module testing, the optimal power point can be found
by using the function signal generator in the LabVIEW to stimulate the voltage and current
to get their curves, the
graph, and the power curve.
Key words: data acquisition; signal regulation; the optimal power point; LabVIEW
