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Better characterization of PV inverters, coupled to the network with the new quantities of total return and dynamic MPPT performance.

Many investors for solar systems connected to the network in a relatively short specified by the manufacturer. Often present a range of relatively wide input voltage. But manufacturers often indicate that a maximum yield (conversion) and yield U. S. Union.

It is also frequently indicated a DC voltage rating, that such performance indicators may be right. Occasionally a yield curve (usually in very small print) is indicated (usually rated voltage).
Performance? These performance indicators are often inadequate for the planning of photovoltaic installations optimum size. It is perfectly clear that the conversion efficiency depends on the DC voltage used (and is true to a lesser extent also the AC voltage). Generally, no information on the dependence of the yield function of strain. A manufacturer who rarely makes European performance of two or more different voltages.

The generator of solar photovoltaic system has a characteristic temperature determined by the user interface module and the momentary solar radiation, which presents a particular point (maximum power point MPP) of maximum power at a voltage Umpp PMPP. The UPS is trying, among other things, remain possible in the MPP with insolation values and temperature variables. (Maximum-Power-Point Tracking MPPT). As the measure of the quality of the Max-Power-Point-Tracking is relatively difficult, it is usually tacitly assumed that the inverter works exactly the MPP. But according to the MPPT implementation processes, the differences more or less important, at least for certain powers and tensions arise, which can reduce the energy of the whole plant (under certain circumstances, to “a small percentage). A trend in the solar modules to improve the specifications, so that the power specifications are given to the sunlight and the energy of different measures in real time.

Therefore, the possibility of obtaining an estimate of the improvement DC production of photovoltaic systems. But if the energy losses consecutive errors in the MPP-Tracking investors are equally ill-considered, uncertainty still exists for the identification of plants connected to the network. The purpose of this paper is firstly, to define the performance of MPP-Tracking MPPT then set the MPPT performance and general tot and illustrate these quantities based on some practical steps. If, on the basis of measurements made on a UPS that tot the overall performance is known by different voltages, the developer of a photovoltaic system can not only adjust the solar generator and UPS optimally on the basis of power but also of tension. tot values can also be used in simulation programs, so that a calculation production can be improved.