Consideration of capacity adequacy criterion in optimizing the prospective structure of electric power system

Belyaev, N. A.; Korovkin, Nikolay; Chudny, Vladimir S.

doi:10.24223/1999-5555-2020-13-1-11-16

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…О постоянном возврате к вопросу надежности говорят и аналитические отчеты, в которых ежемесячно упоминается об отказах и/или поломках высоковольтного оборудования на электроэнергетических подстанциях, что приводит к выводу из строя не только оборудования, но и всей системы электроснабжения (СЭС) [12][13][14].…”

Section: Introductionunclassified

Methods for calculating the reliability of power supply systems

Lukovenko

Зеньков

2021

jour

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The aim was to determine the reliability indicators of a power supply system using an artificial neural network model. A model for calculating technical reliability was developed using the following methods: an algorithm for calculating reliability indicators of power supply systems, the method of failure rate of a power supply system and a forecasting model using artificial neural networks. It was established that a power supply system is formed by an open radial power supply circuit. The failure rate of the power supply subsystem was determined by calculating the failure rate of i-th element of the subsystem. As a result of calculating the probability of failure-free operation of the subsystem for various conditions (5 time intervals), it was found that with an increase in the operating time from 100 to 500 h, a linear increase in the rate of system failures occurs from 0.0051 to 0.0073 1/h. A comparison of the obtained mean-to-failure values of the main and the same backup subsystem in the unloaded mode with an absolutely reliable switch (269.62 h) with the main and the same backup subsystem in the loaded mode (202.21 h) was carried out. The results differ by 67.41 h, which indicates a higher degree of reliability of the first method. The software package Prognoz_INS_2020 was developed. An acceptable accuracy of no more than 2.17% was obtained by comparing the results of the conventional calculation of the failure rate of power supply systems and using the Prognoz_INS_2020 software package. This indicates the efficiency of the proposed software package in reliability calculations at operating energy enterprises. The proposed methods for assessing technical reliability both using the conventional model and a model based on an artificial neural network made it possible to assess the state of power supply systems, which helps to prevent dangerous emergencies.

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Section: Introductionunclassified

Methods for calculating the reliability of power supply systems

Lukovenko

Зеньков

2021

jour

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A model for power shortage minimization in electric power systems given constraints on controlled sections

et al. 2021

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Development of measures to reduce grid energy losses in the Namangan Region of Uzbekistan

Tiguntsev

Akhmedov

Usmonov

2022

jour

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The paper is aimed at developing technical and organizational measures to reduce the losses of electrical energy during its transmission via main and distribution electrical grids, in power transformers and electric power trans-mission lines. The focus of the study was on electrical grid modes in the Namangan Region of Uzbekistan (voltages of 220/110/35/10/6 kV), which were analyzed via technological calculation-based research methods using an equivalent circuit representing the linear circuit currently employed in the regional electric energy system. In addition, electrical grids were simulated using the software package “Program for calculating electrical grid modes” followed by the processing of calculation results by means of the Microsoft Excel package. The paper calculates electrical modes for the equivalent circuit of the regional electric energy system, as well as offering technical measures (installation of reactive power compensation devices; adjustment of transformation ratios in power transformers) aimed at adjusting voltage to improve electric power quality in terms of voltage deviations and lower power losses. Voltage deviations in most grid nodes were found to be inconsistent with GOST 32144-2013. Thus, in 35 kV, 10 kV, and 6 kV nodes, the largest underdeviation amounted to 12.45 kV, 3.26 kV, and 2.09 kV, respectively. For the placement of reactive power compensating devices having a total power of 67.82 MV∙Ar, 35 kV nodes were used; in addition, the values of transformer ratios at transformer substations (35–110 kV) were determined. Calculations indicate that the conducted activities can normalize voltage in the 35 kV, 10 kV, and 6 kV nodes while reducing power losses in the electrical grid by 9.35 MW. It is estimated that the proposed measures will be paid back in approximately three years. By means of compensating reactive power and adjusting transformer ratios, these measures can reduce electrical energy losses during transmission in the considered objects and maintain a given voltage level.

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Consideration of capacity adequacy criterion in optimizing the prospective structure of electric power system

Cited by 3 publications

References 3 publications

Methods for calculating the reliability of power supply systems

Methods for calculating the reliability of power supply systems

A model for power shortage minimization in electric power systems given constraints on controlled sections

Development of measures to reduce grid energy losses in the Namangan Region of Uzbekistan

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