Abstract
The article covers the study of methods for calculating the reliability of schemes of power supply for consumers at the present stage. It analyzes the existing methods for calculating the reliability of various schemes of power supply systems for consumers. Methods for determining the reliability indicators of redundant systems are reviewed. Examples are given
Highlights
A comprehensive assessment of the reliability of electric power systems (EPS) [1,2,3,4,5, 8,9,10] includes a joint review of electrical networks (EN), power plants and substations
With a certain convention in the general complex concept of reliability of power systems, functional concepts can be distinguished by particular concepts related to the main structural components of a power system: reliability of a generation system — the property of power plants to maintain the required power balance at a standard frequency value; reliability of the main electric network the property to stably transmit power from parts of the power system with excess power to parts of the power system with a deficit of power; reliability of the distribution network - the property of this network is to provide continuous power to the load nodes
Two particular concepts can be distinguished [9,10]: reliability in the steady state is the balance reliability, i.e. the ability to balance power and electric energy (EE) with the standard quality of EE; Reliability in the transition process (Security) is the mode reliability, i.e. the ability of individual structural parts and the energy system as a whole to withstand violations of the mode and provide power to consumers
Summary
A comprehensive assessment of the reliability of electric power systems (EPS) [1,2,3,4,5, 8,9,10] includes a joint review of electrical networks (EN), power plants and substations. In the reliability of the electric power industry, two components can be conditionally distinguished [1,2,3, 5]: 1) the first one, due to the structure of the system, i.e. the composition of the elements, their interconnections, throughputs, without a quantitative consideration of the operational features of the functioning of the elements structural reliability; 2) the second one, due to the features of the modes in the system, their limitations on the throughput of the elements when changing the structural system in various states - functional reliability Such a subdivision is conditional, because the interconnection of these components is obvious, but it allows simplifying the tasks of assessing the reliability of networks of complex structure. By duplicating the functions of the recovered elements and reducing the recovery time, an arbitrarily high degree of system reliability can be achieved
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