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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2020-22-1-58-68</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-1285</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="ru"><subject>ЭНЕРГЕТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Нормирование амплитуды высших гармоник при определении фидера с однофазным замыканием на землю</article-title><trans-title-group xml:lang="en"><trans-title>Rating of amplitudes of high harmonics in determining feeder with single-phase ground fault</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федотов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedotov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федотов Александр Иванович – д-р техн. наук, проф., в.н.с. отдела НИОКР Инжиниринговый центр</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Alexander I. Fedotov</p><p>Kazan </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахметвалеева</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhmetvaleeva</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ахметвалеева Ляля Вахитовна – канд. техн. наук, доцент кафедры «Промышленная электроника и светотехника</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Lyalya V. Akhmetvaleeva</p><p>Kazan </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Басыров</surname><given-names>Р. Ш.</given-names></name><name name-style="western" xml:lang="en"><surname>Basyrov</surname><given-names>R. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Басыров Рафик Шайхолович – доц. кафедры «Техническая физика»</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Rafik S. Basyrov</p><p>Kazan </p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вагапов</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vagapov</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вагапов Георгий Валериянович – канд. техн. наук, доцент, с.н.с. отдела НИОКР Инжиниринговый центр</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Georgii V. Vagapov</p><p>Kazan </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федотов</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedotov</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федотов Евгений Александрович – канд. техн. наук, доцент кафедры «Электрические станции»</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Evgeniy A. Fedotov</p><p>Kazan </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный энергетический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Power Engineering University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Казанский национальный исследовательский технический университет им. А.Н. Туполева – КАИ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan National Research Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>30</day><month>04</month><year>2020</year></pub-date><volume>22</volume><issue>1</issue><fpage>58</fpage><lpage>68</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Федотов А.И., Ахметвалеева Л.В., Басыров Р.Ш., Вагапов Г.В., Федотов Е.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Федотов А.И., Ахметвалеева Л.В., Басыров Р.Ш., Вагапов Г.В., Федотов Е.А.</copyright-holder><copyright-holder xml:lang="en">Fedotov A.I., Akhmetvaleeva L.V., Basyrov R.S., Vagapov G.V., Fedotov E.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://www.energyret.ru/jour/article/view/1285">https://www.energyret.ru/jour/article/view/1285</self-uri><abstract><p>Цель работы заключается в теоретическом и экспериментальном исследовании процессов при однофазных замыканиях на землю в электрических распределительных сетях 6-10-35 кВ с изолированным режимом работы нейтрали. Используется метод математического нормирования, применяемый при анализе спектрального состава токов и напряжений с целью повышения информативности выделяемых высших гармонических составляющих тока и напряжения. В статье приведено сопоставление результатов спектрального анализа с учетом и без учета математического нормирования, полученных на имитационной модели. Натурные эксперименты продемонстрировали эффективность использования метода математического нормирования высших гармонических составляющих тока и напряжения при различных видах однофазных замыканий на землю. Результаты натурных экспериментов предоставили возможность улучшения методики раннего выявления однофазных замыканий на землю в электрических сетях 6-10-35 кВ с изолированным режимом работы нейтрали. Выводом исследования является возможность существенно более точного выделения резонансных частот спектра токов и напряжений, получаемых с использование метода математического нормирования. Одновременно продемонстрирована возможность более ранней и уточненной локализации фидера с замыканием на землю на основе более точного выделения резонансных частот токов и напряжений. </p></abstract><trans-abstract xml:lang="en"><p>The aim of the paper is theoretical and experimental research of processes during the single-phase ground faults in electrical distribution grids of 10/06/35 kV with isolated neutral mode. The mathematical method of rationing is used for the analysis of the spectral composition of currents and voltages increasing the information content of the allocated higher harmonics of current and voltage. The paper show a comparison of the results of spectral analysis with and without taking into account the mathematical rationing obtained on the simulation model. Field experiments have demonstrated the effectiveness of using of the method of mathematical rationing of the higher harmonic components of current and voltage for various types of single-phase ground faults. The results of field experiments provided an opportunity of improving the methodology of yearling detection of single-phase ground faults in electric grids of 6-10-35 kV with an isolated mode of neutral. The conclusion of the research is the possibility of a significantly more accurate selection of the resonant frequencies of the spectrum of currents and voltages obtained by using of the method of mathematical rationing. The possibility of earlier and more precise localization of the feeder with ground fault is shown on the base more precise selection of the resonant frequency currents and voltages. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>высшие гармонические составляющие тока и напряжения</kwd><kwd>однофазные замыкания на землю</kwd></kwd-group><kwd-group xml:lang="en"><kwd>higher harmonics of current and voltage</kwd><kwd>single-phase ground fault</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках проекта темы научного исследования «Методы повышения надежности систем электроснабжения и качества электроэнергии на основе электрохимических накопителей и цифрового мониторинга состояния распределительных электрических сетей» (мнемокод 0672-2020-0007, № FZSW-2020-0007).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Манилов А., Барна А. 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