engleski

Techno-economic analysis of the project of a photovoltaic power plant for self-supply of electricity in family houses according to the ESCO model

The photovoltaic system is in most cases connected to the public network through a home installation that is in parallel operation with the distribution network for the purpose of supplying consumers within the household, and the excess energy produced can be sold at an incentive price. ESCO companies play a major role in financing the photovoltaic system projects for houses. Namely, they initially pay the full value of the investment, which the client repays over the next few months or years, through the savings, until the investment is fully paid off. ESCO (energy service company) is the name for a company that plans, implements and finances projects in the field of energy efficiency and renewable energy sources and is paid from the savings. The goal of the ESCO model is to provide the customer with lower energy and maintenance costs by installing new equipment and optimizing energy systems. Projects are financed from realized savings, usually over a period of 5 to 10 years. It is very important before building a power plant to study the way of energy consumption within a particular household, as well as to estimate the amount of energy needed to power the device on an annual basis. Only then can the optimal value of the power plant power be obtained, which is necessary for the investment to be as profitable as possible, the return on investment as short as possible and the costs for electricity as low as possible. In order to determine suitable family houses and optimize the size and installation costs of a photovoltaic power plant, it is necessary to make models of own consumption of typical households with a connected power between 4 and 10 kW ; a model for determining the optimal power of a PV self- sufficiency system for a particular house on site and a model for using household appliances to optimize profits from PV systems at selected locations. Based on the results of these models, acceptable users should be determined for the ESCO model of the photovoltaic power plant project for self-sufficiency in family houses. Manuscript shows a model for finding the optimal power of a photovoltaic power plant with optimal return on investment with the sale of electricity to the distribution network at a price lower than the takeover from the network (according to the existing tariff system). The paper also analyses finding the return on investment with an increase in the price of electricity from the grid, an increase and decrease in the price of photovoltaic panels by 30% and changes in consumption parameters.

PV plant ; ESCO model ; optimal power of a PV ; return on investment

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