Entropic analysis of distributed generation systems

Kateryna Klen; Valery Zhuikov

doi:10.3103/S0735272721100046

Authors

Kateryna Klen Igor Sikorsky Kyiv Polytechnic Institute, Kyiv, Ukraine https://orcid.org/0000-0002-6674-8332
Valery Zhuikov Igor Sikorsky Kyiv Polytechnic Institute, Kyiv, Ukraine https://orcid.org/0000-0002-3338-2426

DOI:

https://doi.org/10.3103/S0735272721100046

Keywords:

distributed generation system, renewable energy source, solar radiation flux, entropy divergence

Abstract

It is proposed to use the entropy divergence function for entropy analysis of distributed generation systems. A description of the system of distributed generation through the distribution of carriers and resources of generation and consumption is represented. A new method for calculating the probabilities of micro- and macrostates of the system is given. The function of entropy divergence is obtained as an integral characteristic of the macrostate of the distributed generation system, as well as its main properties. The entropic divergence of the solar radiation flux is calculated. The Matlab R2020a Simulink® software environment simulates a distributed generation system consisting of a renewable energy source, a storage device, and an active load. There are represented the time dependences of the storage device charge state modification. The entropy and entropy divergence of the energy flow at the storage device output in such system are calculated. It is shown that to reduce the value of entropy divergence of energy flow at the storage device output, i.e. to bring its operation mode to the maximum allowable, it is necessary in accordance with the entropy divergence of solar radiation flux, taken with the opposite sign, to change the storage capacity without increasing its absolute value. This reduces the duration of the time intervals when the storage device is fully charged and fully discharged, but the energy balance in the system is maintained.

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