DOI: https://doi.org/10.15588/1607-6761-2018-2-5

COMBINED MOBILE POWER SYSTEM FOR THE STANDBY POWER SUPPLY OF THE LOW AND AVERAGE ELECTRICAL FACILITIES

F.P. Shkrabets, V.V. Berdnyk

Abstract


Purpose. The objective of research is to develop a version of combined mobile system of the main and backup power supply  based on renewable and traditional energy sources for low-power consumers in regions distant from the main electricity grid; to describe the design of the proposed system; to develop a block diagram of the control and management algorithm for the system elements aimed at achieving more efficient energy supply to consumers in case of further implementation of the system,.

Methodology. To attain the research objective, the following methods have been employed: the method of analytical processing of the reviewed materials on current state of alternative energetics, on problems related to energy supply for low-power remote consumers, and on ways of solving the problems identified by means of simulating potential uninterruptible power systems; the method of system analysis of complex estimation based on modern computer technologies as for the combined mobile system of the main and backup power supply potential.

The results obtained. The expediency of development and further improvement of such combined power supply systems intended for low-power consumers with the purpose of providing the energy balance in the Dnipro region (Ukraine) has been revealed and proved. A version of the combined system based on traditional and renewable sources of power is proposed and described. The block diagram of the combined system controller algorithm is developed. The mechanism of action of the presented algorithm is determined, as well as the graphical dependences of the power factor on the speed of the wind turbine CP=f(Z), and of mechanical torque of the wind turbine on the coefficient of its speed M=f(Z) are obtained and analyzed. The results of calculation as for electric power generated by potential wind power plant W, [kWh] during the year are presented.

Scientific novelty consists in the proposed block diagram of the control and management algorithm as regards the combined backup power supply system, that allows wind turbine engines and diesel units to alternately operate on a single generating unit.

The practical value of study is further development of the system which provides guaranteed uninterruptible energy supply and distribution of electric energy intended for low-power energy consumers to satisfy their needs; increasing the efficiency, flexibility and reliability of the system and, ultimately, reducing the energy dependence of the country on the import of traditional fossil energy resources, the conversion of which leads to negative consequences for the country's ecology. The implementation of the proposed block diagram of the control and management algorithm will reduce the cost of the system and the cost of its maintenance, for example, current repairs, etc.


Keywords


backup power supply; energy consumption; renewable energy sources; combined system; wind turbine generator; engine; diesel unit; power; block diagram; mobility; efficiency; dependence

References


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GOST Style Citations


[1]  Shcrabets, F. P. The Systems of Backup Power Supply Based on Renewable Energy Sources for Mobile Facilities [Text] / F. P. Shcrabets, P.Yu. Krasovskyi, V.V. Berdnyk // Scientific Bulletin of National Mining University. – 2017. – No 2. – P. 81-86.

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[3]  Kannan, N. Solar Energy for Future World: A Review [Text] / N. Kannan, D. Vakeesan // Renewable and Sustainable Energy Reviews. – 2016. – Vol. 62. – P. 1092-1105.

[4]  Kaldellis, J.K. Overview of Stand-Alone and Hybrid Wind Energy Systems [Text] / J.K. Kaldellis. – Woodhead Publishing Limited. – 2010. – P. 1 – 27

[5]  Alone and Hybrid Wind Energy Systems [Text] / J.K. Kaldellis. – Woodhead Publishing Limited. – 2010. – P. 102-161.

[6]  Bhuvaneswari, G. Hybrid Wind-Diesel Energy System [Text] / G. Bhuvaneswari, R. Balasubramanian. – Woodhead Publishing Limited. – 2010. – P. 191-215.

[7]  Philip, S. Off-grid solar photovoltaic systems for rural electrification and emissions mitigation in India [Text] / S. Philip, F. Samuel. – Solar Energy Materials and Solar Cells. – 2016. – P. 147-156

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[9]  Salas, V. Review of the maximum power point tracking algorithms for stand-alone photovoltaic systems [Text] / V. Salas, E. Olias. – Solar Energy Materials and Solar Cells. – 2006. – P. 1555-1578

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