This article analyses the influence of supporting scheme variants on the profitability of a projected investment of residential photovoltaic systems. The focus of the paper lies in evaluating the feasibility for the power system of solar power generation technologies to achieve a balance between energy generation and support costs in a more efficient way. The case study is based on a year-long time series of examples with an hourly resolution of electricity prices from the Nord Pool power market, in addition to the power demand and solar generation of Latvian prosumers. Electric energy generation and the consumption of big data from more than 100 clients were collected. Based on these data, we predict the processes for the next 25 years, and we estimate economic indicators using a detailed description of the net metering billing system and the Monte-Carlo method. A recommendation to change the current net system to a superior one, taking into account the market cost of energy, concludes the paper.
The article is dedicated to tasks related to rational cooperation of supply and distribution network companies in the designing and construction of power transmission lines at market conditions. Specifically, the individual and cooperative approaches in decision-making for individual market participants are considered. To substantiate the rationality of the decisions and to show the additional gain in case of cooperation between the companies, avoided cost method and cooperative game theory methods are used. The article considers solution alternatives in case of a collision of interests between the companies of the high-voltage network and those of the low and medium voltage networks; the selected alternatives are compared and the possible gain of the participants in case of various models of behavior is analysed. The proposed strategies and calculation examples are based on an ongoing high-voltage power transmission line reconstruction project in a real European country.
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