| Over the last decades, because of the pollution and awareness of limited resources of fossil fuels, the renewable sources of energy production gained increasing confidence as appropriate solution for humankind. Within the south region of Romania, due to the high solar potential there have been developed numerous photovoltaic stations. Still, one could note that these solar plants take a considerable part of agricultural land. This paper is the starting work of a study that aims to address meaningfully the issues of increasing efficiency of the photovoltaic systems by utilization of solar radiation concentrator elements, as well as of reducing of costly photovoltaic surface. In the literature there are three types of solar concentrators: high, medium or low concentration (LCPV). To have a maximum efficiency the LCPV must include automatic sun tracking system. In practice there are two types of automatic tracking systems, those using solar sensors and those that follow a predetermined trajectory. This paper combines the two types of systems thus achieving low power consumption. It also allowed the monitoring and control of tracking system both locally and remotely using standard interfaces. Solutions and algorithms proposed in this paper are verified experimentally on a prototype developed by the authors. |
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