Keywords: renewable energy sources, electric power system, balance reliability, indicators of demand supply.


The introduction of alternative energy sources in power systems can reduce the harmful effects on the environment from traditional generation sources, but also has a number of disadvantages. First of all, it is the unstable generation of renewable energy sources (RES) due to the dependence on weather conditions, which creates a number of atypical problems for electrical networks and the power system as a whole. Therefore, there is a need to improve the means of system automation in order to coordinate the power supply from RES and network substations of the power system. The influence of RES on the modes of district electric networks depends on the value of the total dispersed generation in it, on the unit installed capacity of RES, as well as on their place of connection to the electric network.

The traditional approach to estimating the optimal configuration is to ensure the balance reliability or adequacy of the generation system. At the same time, indicators of supply demand come to the fore. However, when assessing the economic indicators of energy systems using RES, it is also necessary to take into account the rational use of generated electricity.

The article considers the basic indicators (indices) of compliance of generation in relation to consumption, such as loss of load expectation, loss of load probability, loss of load frequency, loss of load duration. The value of the balance reliability indicator should be chosen on the basis of determining the level of reliability of meeting the needs of consumers in electricity, at which the additional cost of increasing it for the power system will be higher than compensation for the probable level of consumer losses. Ref. 6.

Author Biographies

Y Mateienko, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 03056, 37 Peremogy Av., Kyiv, Ukraine.

Mateienko.pngAuthor information:  Associate Professor of the СDepartment of Power Stations of the National Technical Uni-versity of Ukraine «Igor Sikorsky Kyiv Poly-technic Institute» (Igor sikorsky KPI), PhD of Technical sciences
Education: Kyiv Polytechnic Institute, engineer-electrical on the specialty «Power Stations»
Research area: Investigation of the problems of improving the reliability of electric facilities and ensuring ener-gy security in the operating conditions of the energy market
Publications: 72

R. Vozhakov, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 03056, 37 Peremogy Av., Kyiv, Ukraine.

Vozhakov.pngAuthor information:  Teaching Fellow of the Department of Renewa-ble Energy of the National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»
Education: NTUU “Kyiv Polytechnic Institute”, master of electrical engineering, specialty «Power Plants»
Research area: Decision support systems for resource manage-ment of power electrical equipment of power plants
Publications: 28


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How to Cite
Mateienko, Y., & Vozhakov, R. (2021). ANALYSIS OF BALANCE RELIABILITY OF ELECTRIC POWER SYSTEMS WITH RENEWABLE ENERGY SOURCES. Vidnovluvana Energetika, (4(67), 18-24.
Complex Problems of Power Systems Based on Renewable Energy Sources