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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Automation and modeling in design and management</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Automation and modeling in design and management</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Автоматизация и моделирование в проектировании и управлении</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2658-3488</issn>
   <issn publication-format="online">2658-6436</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">47510</article-id>
   <article-id pub-id-type="doi">10.30987/2658-6436-2021-3-4-77-84</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Электротехнические комплексы и системы</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Electrotechnical complexes and systems</subject>
    </subj-group>
    <subj-group>
     <subject>Электротехнические комплексы и системы</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">INFLUENCE OF THE REMNANT MAGNETIZATION OF THE CURRENT TRANSFORMER CORES UPON THE COMPLIANCE OF THEIR TECHNICAL CHARACTERISTICS WITH THE REQUIREMENTS FOR MICROPROCESSOR TYPE PROTECTIVE RELAYS</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>ВЛИЯНИЕ ОСТАТОЧНОЙ НАМАГНИЧЕННОСТИ СЕРДЕЧНИКОВ ТРАНСФОРМАТОРОВ ТОКА НА СООТВЕТСТВИЕ ИХ ТЕХНИЧЕСКИХ ХАРАКТЕРИСТИК ТРЕБОВАНИЯМ МИКРОПРОЦЕССОРНЫХ УСТРОЙСТВ РЕЛЕЙНОЙ ЗАЩИТЫ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Морозов</surname>
       <given-names>Сергей Владимирович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Morozov</surname>
       <given-names>Sergey Vladimirovich</given-names>
      </name>
     </name-alternatives>
     <email>morser777@yandex.ru</email>
     <bio xml:lang="ru">
      <p>кандидат технических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of technical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Морозов</surname>
       <given-names>Андрей Сергеевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Morozov</surname>
       <given-names>Andrey Sergeevich</given-names>
      </name>
     </name-alternatives>
     <email>luckytrue@yandex.ru</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Брянский государственный технический университет</institution>
    </aff>
    <aff>
     <institution xml:lang="en">Bryansk State Technical University</institution>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2021-12-30T11:07:17+03:00">
    <day>30</day>
    <month>12</month>
    <year>2021</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2021-12-30T11:07:17+03:00">
    <day>30</day>
    <month>12</month>
    <year>2021</year>
   </pub-date>
   <volume>2021</volume>
   <fpage>77</fpage>
   <lpage>84</lpage>
   <history>
    <date date-type="received" iso-8601-date="2021-12-03T00:00:00+03:00">
     <day>03</day>
     <month>12</month>
     <year>2021</year>
    </date>
   </history>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/47510/view">https://zh-szf.ru/en/nauka/article/47510/view</self-uri>
   <abstract xml:lang="ru">
    <p>Показана актуальность исследования технических характеристик трансформаторов тока, входящих в состав микропроцессорных устройств релейной защиты и автоматики. Приведены результаты расчета времени до насыщения сердечника трансформатора тока в зависимости от остаточной намагниченности с учетом апериодической составляющей тока для терминалов ООО НП «ЭКРА». Даны рекомендации по замене электрооборудования при некомплексной реконструкции подстанции.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Work objective is finding rational technical and economic solutions for examining current transformers for techspecs compliance satisfying the requirements of reinstalled microprocessor type protective relays and automation devices manufactured by NP EKRA LLC, taking into account DC component. Research methods: analytical methods for calculating the time of remnant magnetization in the core of a current transformer. Research results and novelty: it is understood that the saturation time of current transformers of the basic and backup protections, according to the results of the analytical method, was more than 25 ms, and for current transformers of differential bus bar protection was more than 5 ms. The obtained saturation time values for all types of current transformers built into oil circuit-breaker bushings (HV line) of  110 kV and bus bar coupling connector (BCC) of 110 kV (main protection, backup protection, differential bus protection), both in the absence and in the presence of remanent induction magnetic in  CT cores with three-phase and single-phase short circuits, satisfy completely  technical requirements either of microprocessor type protective relays or CT differential bus bar protection. Conclusion: built into CT BCC circuit-breaker bushings of 110 kV and oil circuit-breaker bushings (HV line) of 110 kV Foundry substations  do not necessitate a mandatory replacement in case of  non-complex redesign of microprocessor type protective relays and automation devices. When replacing oil circuit breakers with gas-insulated ones, it is recommended to use CT with similar characteristics.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>трансформатор тока</kwd>
    <kwd>апериодическая составляющая тока</kwd>
    <kwd>микропроцессорное устройство релейной защиты и противоаварийной автоматики</kwd>
    <kwd>время до насыщения сердечника</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>voltage transformer</kwd>
    <kwd>DC component</kwd>
    <kwd>microprocessor type protective ECA relays</kwd>
    <kwd>saturation time</kwd>
   </kwd-group>
  </article-meta>
 </front>
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