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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">energsecurity</journal-id><journal-title-group><journal-title xml:lang="ru">Надежность и безопасность энергетики</journal-title><trans-title-group xml:lang="en"><trans-title>Safety and Reliability of Power Industry</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1999-5555</issn><issn pub-type="epub">2542-2057</issn><publisher><publisher-name>ООО «НПО Энергобезопасность»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24223/1999-5555-2021-14-2-132-141</article-id><article-id custom-type="elpub" pub-id-type="custom">energsecurity-760</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>ПРОЕКТИРОВАНИЕ, ИССЛЕДОВАНИЯ, РАСЧЕТЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DESIGN, RESEARCH, CALCULATIONS</subject></subj-group></article-categories><title-group><article-title>Электрофизические свойства смесей минерального масла и синтетической сложноэфирной диэлектрической жидкости</article-title><trans-title-group xml:lang="en"><trans-title>Electrophysical properties of mixtures of mineral oil and synthetic ester dielectric liquid</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>Лютикова</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyutikova</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>пр. К. Маркса, 20, 630073, г. Новосибирск</p></bio><bio xml:lang="en"><p>K. Marxa str., 20, 630073, Novosibirsk</p></bio><email xlink:type="simple">m.lyutikova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коробейников</surname><given-names>C. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Korobeynikov</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>пр. К. Маркса, 20, 630073, г. Новосибирск</p></bio><bio xml:lang="en"><p>K. Marxa str., 20, 630073, Novosibirsk</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>Коновалов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Konovalov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ул. Беловежская, 4, 121353, г. Москва</p></bio><bio xml:lang="en"><p>Belovezhskaya str., 4, 121353, Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Новосибирский государственный технический университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Novosibirsk State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ПАО «Россети»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>PJSC «Rosseti»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>28</day><month>07</month><year>2021</year></pub-date><volume>14</volume><issue>2</issue><fpage>132</fpage><lpage>141</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лютикова М.Н., Коробейников C.Н., Коновалов А.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Лютикова М.Н., Коробейников C.Н., Коновалов А.А.</copyright-holder><copyright-holder xml:lang="en">Lyutikova M.N., Korobeynikov S.M., Konovalov A.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.sigma08.ru/jour/article/view/760">https://www.sigma08.ru/jour/article/view/760</self-uri><abstract><p>Силовые трансформаторы являются ключевым оборудованием в системах генерации, передачи и распределения электроэнергии. Надежность работы силовых трансформаторов базируется на работоспособности изоляционной системы, которая включает в себя твердую целлюлозную изоляцию и жидкий диэлектрик. Современная энергетика требует от жидкой изоляции превосходные изоляционные свойства, высокие огнестойкие свойства и способность к биологическому разложению. Минеральное масло, которое используется более 100 лет, не отвечает некоторым требованиям. Поэтому в настоящее время рассматриваются различные способы усиления изоляционных свойств масла, в том числе путем смешения его с другими жидкими диэлектриками, обладающими улучшенными свойствами. В качестве таких альтернативных жидкостей рассматриваются синтетические и натуральные эфиры.Рассмотрена возможность усиления изоляционных характеристик минерального масла с высоким содержанием ароматических углеводородов (на примере масла марки Т-750) путем смешения его с синтетическим сложным эфиром Midel 7131. Приведена оценка изоляционных параметров полученных смесей с долей эфира в минеральном масле от 0% до 50%. Описываются основные характеристики смесей, такие, как плотность, кинематическая вязкость, температура вспышки, тангенс угла диэлектрических потерь, относительная диэлектрическая проницаемость, пробивное напряжение и влагосодержание. Показано, что с повышением доли эфира одни параметры полученной изоляционной жидкости улучшаются (температура вспышки, диэлектрическая проницаемость, пробивное напряжение), а другие показатели (плотность, кинематическая вязкость, тангенс угла диэлектрических потерь) при содержании эфира более 10% в смеси не соответствуют требованиям, предъявляемым к минеральным маслам. </p></abstract><trans-abstract xml:lang="en"><p>Power transformers are key equipment in power generation, transmission, and distribution systems. The reliability of power transformers is based on the performance of the insulation system, which includes solid cellulose insulation and a liquid dielectric. Modern power engineering requires liquid insulation to have excellent insulating properties, high fire resistance, and biodegradability. Mineral oil that has been in use for over 100 years does not meet certain requirements. Therefore, various methods of enhancing the insulating properties of the oil are currently being considered, including mixing it with other liquid dielectrics, which have excellent properties. Synthetic and natural esters are considered as alternative fluids.This article discusses the possibility of enhancing the insulating characteristics of mineral oil with a high content of aromatic hydrocarbons (for example, T-750 oil) by mixing it with synthetic ester Midel 7131. Assessment is given of insulating parameters of the resulting mixtures with an ester fraction in mineral oil from 0% to fifty%. The main characteristics of the mixtures are described, such as density, kinematic viscosity, flash point, dielectric loss tangent, relative dielectric permittivity, breakdown voltage, and moisture content. It is shown that with an increase in the proportion of ester, some parameters of the obtained insulating liquid improve (flash point, dielectric constant, breakdown voltage), while values of other parameters (density, kinematic viscosity, dielectric loss tangent) with an ester content of more than 10% in the mixture do not meet the requirements for mineral oils.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>минеральное изоляционное масло</kwd><kwd>синтетический эфир</kwd><kwd>электрофизические свойства</kwd><kwd>пробивное напряжение</kwd><kwd>диэлектрические потери</kwd><kwd>диэлектрическая проницаемость</kwd><kwd>температура вспышки</kwd><kwd>вязкость</kwd><kwd>плотность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mineral insulating oil</kwd><kwd>synthetic ester</kwd><kwd>electrophysical properties</kwd><kwd>breakdown voltage</kwd><kwd>dielectric loss</kwd><kwd>dielectric permittivity</kwd><kwd>flash point</kwd><kwd>viscosity</kwd><kwd>density</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">Wang X., Tang Ch., Huang B., Hao J., Chen G. 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