Abstract
The article is devoted to the development of alternative energy sources, in particular, on-grid photovoltaic installation of low power. The Ukrainian regulatory framework has created the prerequisites for the active development of this industry by a simplified system of interconnection sources of private households to the electrical power system and a high rate of «green» tariff for electricity for private households, producing electricity from solar energy. Similar tariffs are available in other countries, in particular in the countries of the European Union, under the name feed-in-tariffs, so private households can get paid for excess electricity that do not consume on their own households and sent into the grid. The article deals with the disadvantages of existing methods for estimating future profits from the sale of electric energy at a «green» tariff (feed-in tariff) and proposes a method for taking into account the technical limitations on normalized electricity quality indices. It is shown, that ignoring the technical limitations, concerning the level of voltage, leads to overestimating the calculated value of the generated electricity up to 33 %, that can grow due to the increase of payback period up to 1,5 times. The possibility of transforming the overage of unrealized electric energy into heat is also considered.
Highlights
The Keywords: on-grid photovoltaic installation, feasibility study, age values in a low voltage dispayback period does not exceed technical limitations, annual electricity production
The same values of power generation, connected to different points of the electrical network, can in one case satisfy and in another case not satisfy allowable voltage deviation. It can be seen, that the highest voltage values are observed at the beginning of the transmission line and at the point of attachment of the photovoltaic installation, it is important to analyze the voltage range in these points
The obtained data allows low voltage electrical networks to estimate the power of the attached energy sources, which will not negatively affect the operating modes of these networks
Summary
The Keywords: on-grid photovoltaic installation, feasibility study, age values in a low voltage dispayback period does not exceed technical limitations, annual electricity production. In neglecting the transverse component of voltage loss, on example, to increase the bandwidth of the electrical network, the site from the power source to the photovoltaic installation, as a rule, their connection to low voltage distribution the voltage drop is equal to: networks is carried out without any additional changes of transmission lines cross sections.
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