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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gscience</journal-id><journal-title-group><journal-title xml:lang="en">Mining Science and Technology (Russia)</journal-title><trans-title-group xml:lang="ru"><trans-title>Горные науки и технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-0632</issn><publisher><publisher-name>The National University of Science and Technology MISiIS (NUST MISIS)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/2500-0632-2024-03-254</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-768</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING, AUTOMATION, AND ENERGY PERFORMANCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭНЕРГЕТИКА, АВТОМАТИЗАЦИЯ И ЭНЕРГОЭФФЕКТИВНОСТЬ</subject></subj-group></article-categories><title-group><article-title>Reliability analysis of open-pit power supply system components</article-title><trans-title-group xml:lang="ru"><trans-title>Анализ надежности элементов системы электроснабжения карьеров</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3777-7203</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Клюев</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Klyuev</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Роман Владимирович Клюев – доктор технических наук, доцент, профессор кафедры техники и технологии горного и нефтегазового производства</p><p>Scopus ID 57194206632</p><p>г. Москва</p></bio><bio xml:lang="en"><p>Roman V. Klyuev – Dr. Sci. (Eng.), Assistant Professor, Professor of the Department of Engineering and Technology of Mining and Oil and Gas Production</p><p>Scopus ID 57194206632</p><p>Moscow</p></bio><email xlink:type="simple">kluev-roman@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Московский политехнический университет<country>Россия</country></aff><aff xml:lang="en">Moscow Polytechnic University<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>01</day><month>08</month><year>2024</year></pub-date><volume>9</volume><issue>2</issue><issue-title>Online First</issue-title><fpage>183</fpage><lpage>194</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Klyuev R.V., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Клюев Р.В.</copyright-holder><copyright-holder xml:lang="en">Klyuev R.V.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://mst.misis.ru/jour/article/view/768">https://mst.misis.ru/jour/article/view/768</self-uri><abstract><p>In the field of designing power supply systems of open pits an important role is attributed to the problems of components reliability analysis, which can be solved by integrated application of different analysis methods for individual types of electrical equipment and network devices in power supply systems. The purpose of the work is to establish optimal parameters for an open-pit mine power supply at mining and processing complexes, and to conduct research that allows a technical and economic model of the system to be created. It has been established that mathematical statistics provides a number of methods for establishing the homogeneity (or heterogeneity) of the population of random variable values. When analyzing the data of failure statistics of electrical equipment, the method of comparative estimate of two sample averages (compared to the method of comparing the empirical distribution with the normal distribution or the moving average method) is the most acceptable. The paper presents accident rates of electrical equipment of open-pit substations and network devices of the quarry processed on the basis of data, also presents the relationship between the reliability of the circuit and its elements and shows the influence of protection reliability on the reliability of the circuit. Methods of optimizing open-pit power supply systems are presented, which consist in the use of first-order gradient methods, second-order methods or the so-called quadratic optimization methods, and random search methods. A group of gradient methods is the most widespread for solving nonlinear programming problems, among which the method of steepest descent should be considered primarily. The combination of random search with the penalty function method makes it possible to determine conditional extrema for the problem of optimizing the electrical grid and system operation mode. The method of random descent, which consists in determining the minimum of the target function according to an appropriate algorithm, is also considered, in which the direction of motion is generally given by a random vector uniformly distributed over a hyposphere.</p></abstract><trans-abstract xml:lang="ru"><p>В области проектирования систем электроснабжения карьеров важная роль отводится вопросам анализа надежности элементов, которые могут быть решены в ходе проведения комплексного применения различных методов расчета отдельных видов электрооборудования и сетевых устройств в системах электроснабжения. Целью работы является установление оптимальных параметров электроснабжения рудника открытых горных работ горно-обогатительных комбинатов, проведение исследований, позволяющих создать технико-экономическую модель системы. Установлено, что математическая статистика дает ряд методов установления однородности (или разнородности) совокупности значений случайной величины. При анализе данных аварийной статистики электрооборудования наиболее приемлемым является метод сравнительной оценки двух выборочных средних (по сравнению с методом сравнения эмпирического распределения с нормальным или методом скользящей средней). В работе приведены обработанные на основе данных аварийности электрооборудования рудничных подстанций и сетевых устройств карьера, также представлены соотношения между надежностью схемы и ее элементами и показано влияние надежности защиты на надежность схемы. Представлены методы оптимизации систем электроснабжения карьеров, заключающиеся в применении градиентных методов первого порядка, методов второго порядка или так называемых квадратичных методов оптимизации, методов случайного поиска. В качестве наиболее распространенных для решения задач нелинейного программирования используется группа градиентных методов, среди которых в первую очередь следует рассматривать метод наискорейшего спуска. Сочетание случайного поиска с методом штрафных функций дает возможность определять условные экстремумы для задачи оптимизации режима работы электрической сети и системы. Также рассматривается метод случайного спуска, заключающийся в определении минимума целевой функции по соответствующему алгоритму, при котором направление движения в общем случае задается случайным вектором, равномерно распределенным по гипосфере.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>надежность элементов</kwd><kwd>система электроснабжения</kwd><kwd>карьер</kwd><kwd>градиентные методы</kwd><kwd>аварийность</kwd><kwd>рудничные подстанции</kwd><kwd>случайный поиск</kwd><kwd>целевая функция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>reliability of components</kwd><kwd>power supply system</kwd><kwd>open pit</kwd><kwd>gradient methods</kwd><kwd>accident rate</kwd><kwd>mine substations</kwd><kwd>random search</kwd><kwd>target function</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Пирогов Г. Г. 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