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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">energy</journal-id><journal-title-group><journal-title xml:lang="ru">Энергетика. Известия высших учебных заведений и энергетических объединений СНГ</journal-title><trans-title-group xml:lang="en"><trans-title>ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1029-7448</issn><issn pub-type="epub">2414-0341</issn><publisher><publisher-name>BNTU</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">energy-479</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>ЭЛЕКТРОЭНЕРГЕТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ELECTRICAL POWER ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Методология диагностирования трансформаторов и электрических машин постоянного тока</article-title><trans-title-group xml:lang="en"><trans-title>Methodology for Diagnostics of Transformers and D.C. Electric Machines</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>Брановицкий</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Branovitsky</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук</p><p>г. Минск</p></bio><email xlink:type="simple">energy@bnty.by</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>Мацкевич</surname><given-names>П. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Matskevich</surname><given-names>P. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Минск</p></bio><email xlink:type="simple">energy@bnty.by</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>Скурту</surname><given-names>И. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Skurtu</surname><given-names>I. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Минск</p></bio><email xlink:type="simple">energy@bnty.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Институт прикладной физики НАН Беларуси</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2009</year></pub-date><pub-date pub-type="epub"><day>24</day><month>08</month><year>2009</year></pub-date><volume>0</volume><issue>4</issue><fpage>20</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Брановицкий И.И., Мацкевич П.Д., Скурту И.Т., 2009</copyright-statement><copyright-year>2009</copyright-year><copyright-holder xml:lang="ru">Брановицкий И.И., Мацкевич П.Д., Скурту И.Т.</copyright-holder><copyright-holder xml:lang="en">Branovitsky I.I., Matskevich P.D., Skurtu I.T.</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://energy.bntu.by/jour/article/view/479">https://energy.bntu.by/jour/article/view/479</self-uri><abstract><p>Рассмотрены методы испытания электроэнергетического оборудования применительно к силовым трансформаторам и электрическим машинам постоянного тока через измерение комплекса их параметров. Указанные методы соответственно реализованы в приборах ДСТ-1М и ИПЭМ.</p><p>Проведен анализ влияния индуктивных и емкостных элементов, входящих в состав фильтров низких частот измерительного прибора, на величину обусловленного ими дополнительного сдвига фаз между измеряемыми входными токами и напряжениями. Показано, что дополнительный фазовый сдвиг вызывается колебаниями реальных значений индуктивных и емкостных элементов относительно их номиналов. Рассчитана зависимость среднеквадратического отклонения ошибки измерения мощности  от угла сдвига фаз в нагрузке при различных значениях допусков указанных элементов и распределении реальных значений их номиналов в пределах этих допусков по нормальному закону.</p></abstract><trans-abstract xml:lang="en"><p>The paper considers methods for testing electric power equipment with reference to power transformers and electric direct current machines by measuring complex of their parameters. The above-mentioned methods have been realized in the devices DST-1M and IPEM, respectively.</p><p>An influence of inductive and capacitive elements included as components of low frequency filters in a measuring device on a value of an extra phase displacement between measured input currents and voltages being caused by them has been analyzed in the paper. The paper reveals that the extra phase displacement is initiated by oscillations of actual inductive and capacitive element values relative to their nominal values. Dependence of root-mean-square deviation of power measurement error due to phase displacement angle under load conditions at various tolerance values of the indicated elements and distribution of actual values of their nominal ones within these tolerances according to a normal low   has been calculated in the paper</p></trans-abstract></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Feser, K. Trends in the Insulation Monitoring of Transformers / K. Feser // 10th International Symposium on High Voltage Engineering. – Montreal, 1997.</mixed-citation><mixed-citation xml:lang="en">Feser, K. Trends in the Insulation Monitoring of Transformers / K. Feser // 10th International Symposium on High Voltage Engineering. – Montreal, 1997.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Malewski, R. 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