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Operation Failed

The state regulation of the energy sector as a natural monopoly

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Dobrovolsky V. C., Kostiuk V. 0. The dependency between price and demand for electric energy with tariffs discriminated in three time ranges over 124-hour period Dobrovolsky V. C., Kostiuk V. 0. The dependency between price and demand for electric energy with tariffs discriminated in three time ranges over 124-hour period

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Board № (full): 1 (4) 2001 year
Filesize: 257.58 kB
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A model is developed which describes dependencies between prices and demand for electric energy with tariffs dis-criminated in three time ranges over 24-hour period. The model is a set of nine mutually dependent cubic polynomial function their parameters forming three 3-dimensional matrices and a 3-dimensional vector. The parameters are determined statistically, or by expert evaluation with the help of the least square method. A numerical example is elaborated with data comparable to real one, by which the influence of the tariff changes on the load curve is investigated.

Keywords: electric energy price and tariff, electric energy demand, time range for tariffs, load graph.

Dudnyk O.M., Dunaevska N.I., Sokolovska I.S. Development of the world market of fuel-cell power plants. Creation of normative base for hydrogen power Dudnyk O.M., Dunaevska N.I., Sokolovska I.S. Development of the world market of fuel-cell power plants. Creation of normative base for hydrogen power

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Board № (full): 1 (60) 2020 year
Filesize: 358.78 kB
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We show the importance of development and implementation of new hydrogen power systems for different branches of the Ukrainian economy. It is determined that the key technologies for the creation of hydrogen power in Ukraine are the technologies of hydrogen production using own energy sources and the direct conversion of chemical energy of hydrogen fuels into electricity in fuel cells. We present the main characteristics and advantages of fuel cell power plants (FCPP) and the global volume of their application for different industries. The total electric capacity of FCPP working in 2019 became more than 11 times greater as compared with 2009 and reached 1,100 MW. It was established that the introduction of fuel cell technologies in industrialized countries is considered as a basis for the creation of a centralized world hydrogen economy with the presence and further development of extensive hydrogen infrastructure.
The state of work on standardization in the field of hydrogen power at the international level is analyzed, and the complexity and multiplicity of such tasks are shown. It is substantiated that the appropriate base of normative documents is necessary for the practical implementation of energy-efficient and environmentally friendly hydrogen technologies in Ukraine, in particular, for the production or import of equipment with its subsequent certification. These normative documents should be harmonized with European and international ones in order to remove possible technical barriers in trade.
Keywords: hydrogen, fuel cells, power plant, standardization.