OVERVIEW OF MASS-SIZE AND COST PARAMETERS FOR COMMERCIAL PV-INVERTERS
Fesenko Artem, Chernihiv National University of Technology (95 Shevchenka Str., 14035, Chernihiv, Ukraine)
Husev Oleksandr, Chernihiv National University of Technology (95 Shevchenka Str., 14035, Chernihiv, Ukraine)
Chub Andrii , Tallinn University of Technology (5 Ehitajate tee Str., 19086 Tallinn, Estonia).
Vinnikov Dmitri , Tallinn University of Technology (5 Ehitajate tee Str., 19086 Tallinn, Estonia).
Matiushkin Olexandr , Chernihiv National University of Technology (95 Shevchenka Str., 14035, Chernihiv, Ukraine)
Urgency of the research. The one of the main factors impedes the widespread introduction of power systems based on photoelectric converters, both in household needs and in the composition of mobile technology, is the overall dimensions and high cost of such systems. A noticeable part of the cost is the converter, which contains in its composition scarce and expensive materials, takes a noticeable volume. That is why improving the mass-size parameters of the converter and reducing its cost is relevant and promising.
Target setting. To effectively improve the mass-size and cost parameters of the converter, the devices available on the world market should be considered. Their parameters, features and characteristics should be investigated.
Actual scientific researches and issues analysis. A detailed examination of modern research and publications allowed to identify the following features of modern commercial converters. Firstly, manufacturers do not disclose the peculiarities of the internal construction of their products. Secondly, efficiency, functionality and weight and size parameters differ depending on the power and cost of the converter
Uninvestigated parts of general matters defining. Quantitative parameters must be proposed for a thorough comparison of converters at their cost and mass-size. It is necessary to establish a quantitative relationship between the cost, volume, power and efficiency of the converter, which was previously reduced to specific power.
The research objective. Establish criteria for estimating the weight and size characteristics of inverters that can be calculated on the basis of freely distributed data.
The statement of basic materials. The analysis of the current level of development of commercial converters in the composition of solar systems in a wide range of power was performed. Consider devices whose power ranges from 200 to 5000 W of the world's leading manufacturers.
Parameters obtained from open source device are summarized in the comparative tables. The grouping is based on the power of the inverters. Three groups of comparable devices are distinguished: the first one includes inverters with power up to 1 kW, to the second one from 1 to 3 kW and to the third from 3 to 5 kW, respectively.
Two numerical benchmarks were proposed to compare converters. The first shows the cost per unit of power, the second - the specific volume value. Based on the results of calculations built column charts for each of the indicators within its group.
Conclusions. The proposed indicators allow us to estimate the weight and dimensions of the converters based on freely distributed data.
mass-size parameters; specific power; efficiency; power converter.
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