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  <doc>
    <id>1121</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Fulda</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Der Einfluss von Temperatur, Feldstärke und Atmosphäre auf die Alterung von OIP Hochspannungstransformatordurchführungen</title>
    <parentTitle language="deu">ETG-Fachbericht 134</parentTitle>
    <subTitle language="deu">ETG-Fachtagung „Diagnostik elektrischer Betriebsmittel“</subTitle>
    <author>Andreas Küchler</author>
    <author>Andreas Reumann</author>
    <author>M. Zink</author>
    <author>S. Voll</author>
    <author>Frank Berger</author>
    <author>Achim Langens</author>
    <author>J. Titze</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1106</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName/>
    <publisherPlace>Pilsen, Czech Repbulic</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Steady-state and Transient Electrical Potential Distributions in HVDC Bushings Measured under Different Thermal Conditions</title>
    <abstract language="eng">High voltage DC (HVDC) applications become more and more important and the voltage level for energy transportation increases steadily. Hence the design of the DC insulation systems becomes more and more difficult. The difference between HVDC and HVAC insulation systems is that in HVAC the electrical field is distributed according to the permittivities of the materials. Permittivity is only weakly dependent on temperature, so there is no significant difference between the electrical field distribution at room temperature and operating temperature of the insulation system. In HVDC however the electrical field is distributed according to the conductivities of the insulation materials whereas the conductivity is strongly dependent on temperature. This can lead to completely different field distributions at varying temperatures. The investigations presented here show simulation results of HVDC bushing cores in comparison with measurements on those test objects. Simulations and measurements were performed both for temperature distributions and electric potentials of the grading layers in the bushing at DC voltage. For the first time, it was shown by experiment that the FEM simulation can reproduce real DC field distributions very well. It was also shown, that there is a strong influence of temperature gradients or temperature transients on transient and steady-state electrical potential distribution inside the insulation.</abstract>
    <parentTitle language="eng">19th International Symposium on High Voltage Engineering</parentTitle>
    <author>Andreas Küchler</author>
    <author>Isabell Wirth</author>
    <author>Andreas Reumann</author>
    <author>Markus H. Zink</author>
    <author>Tim Schnitzler</author>
    <author>Achim Langens</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1612</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Pilsen, Czech Republic</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Steady-state and Transient Electrical Potential Distribution in HVDC Bushings Measured under Different Thermal Conditions</title>
    <parentTitle language="eng">19th International Symposium on High Voltage Engineering</parentTitle>
    <author>Isabell Wirth</author>
    <author>Andreas Reumann</author>
    <author>Andreas Küchler</author>
    <author>Tim Schnitzler</author>
    <author>Achim Langens</author>
    <author>Frank Berger</author>
    <author>Markus H. Zink</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
    <collection role="Autoren" number="zink">Markus H. Zink</collection>
    <collection role="ddc" number="621">Angewandte Physik</collection>
  </doc>
  <doc>
    <id>4148</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Measurement and simulation of transient field stresses and impacts on advanced insulation design and new test procedures for HVDC components</title>
    <parentTitle language="deu">Cigre-Konferenz, Paris</parentTitle>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Isabell Wirth</author>
    <author>Andreas Reumann</author>
    <author>Andreas Küchler</author>
    <author>Markus H. Zink</author>
    <author>Frank Berger</author>
    <author>Achim Langens</author>
    <author>Tim Schnitzler</author>
    <author>B. Heil</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
  </doc>
  <doc>
    <id>1115</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Erfassung transienter elektrischer Potentialverteilungen in thermisch hoch belasteten Gleichspannungsdurchführungen</title>
    <abstract language="deu">Mit Hilfe kapazitiver Steuerung können Durchführungen hochspannungsführende Leiter durch geerdete Wände in Gebäuden oder Geräten führen. Bei zeitveränderlichen Belastungen (Stoß-, Wechselspannungen) wird die gewünschte Potentialaufteilung durch die Kapazitäten zwischen den leitfähigen Steuerbelägen erzwungen. Bei Gleichspannung ergibt sich eine resistive Steuerung, die bei homogener Leitfähigkeit des Isolierkörpers eine prinzipiell gleichartige Potentialaufteilung ergibt. Durchführungen sind jedoch thermisch hoch belastete Betriebsmittel, in denen starke Temperaturgradienten und in ihrer Folge starke Leitfähigkeitsgradienten entstehen, die zu einer erheblichen Verschiebung der Potentialverteilung führen können [1]. Für Design und Diagnose ist das Verständnis dieser bisher nur theoretisch erfassbaren Vorgänge von großer Bedeutung. Deshalb wurden für experimentelle Untersuchungen zwei identische Durchführungskörper hergestellt, die mit Temperaturfühlern für thermische Messungen bzw. mit Anzapfungen für die Erfassung von elektrischen Potentialen ausgerüstet wurden. Die identische Beheizung beider Leiterrohre erlaubt es, eine Korrelation gemessener thermischer und elektrischer Profile und Transienten herzustellen. Für rückwirkungsfreie Messung der Gleichspannungspotentiale wurde ein Rotationsvoltmeter benutzt. Die Untersuchungen bestätigen das theoretisch erwartete thermisch-elektrische Verhalten und sie zeigen, dass erhebliche transiente und stationäre elektrische Belastungen auftreten können, die im Zusammenhang mit thermischen Transienten und Belastungen gesehen werden müssen. Sie sind beim Design in Rechnung zu stellen und sie zeigen, dass die bei dielektrischen Diagnosemessungen erfassten Materialkenngrößen wichtige Aussagen über den elektrischen Belastungszustand der Durchführung liefern können.</abstract>
    <parentTitle language="deu">ETG-Fachbericht 144</parentTitle>
    <subTitle language="deu">ETG-Fachtagung Diagnostik Elektrischer Betriebsmittel</subTitle>
    <identifier type="url">https://www.vde-verlag.de/proceedings-de/453648016.html</identifier>
    <author>Andreas Küchler</author>
    <author>Andreas Reumann</author>
    <author>Isabell Wirth</author>
    <author>Achim Langens</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1122</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Fulda</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Der Einfluss von Temperatur und Streukapazität auf diagnostische Kapazitäts- und Verlustfaktormessungen von 400 kV-Hochspannungstransformatordurchführungen</title>
    <parentTitle language="deu">ETG-Fachbericht 134</parentTitle>
    <subTitle language="deu">ETG-Fachtagung „Diagnostik elektrischer Betriebsmittel“</subTitle>
    <author>Andreas Küchler</author>
    <author>M. Zink</author>
    <author>S. Voll</author>
    <author>Frank Berger</author>
    <author>V. Klipfel</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1123</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>23</pageFirst>
    <pageLast>27</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Bali, Indonesia</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Electrical Simulation as a Tool for Ageing-condition Assessment of Generator Transformer Bushings</title>
    <parentTitle language="eng">2012 IEEE International Conference on Condition Monitoring and Diagnosis CMD</parentTitle>
    <author>Andreas Küchler</author>
    <author>M. Zink</author>
    <author>Frank Berger</author>
    <author>V. Klipfel</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1116</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Osijek, Croatia</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Parameter influences on HVDC transformer insulation and its link to conduction processes</title>
    <parentTitle language="eng">32nd International Conference “Science in Practice”</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>A. Krieg</author>
    <author>M. Liebschner</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>4144</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Transient dielectric simulation in time domain with FEM in comparison with circuit models</title>
    <parentTitle language="eng">XIX International Symposium on Theoretical Electrical Engineering, Ilmenau, 2017</parentTitle>
    <author>Sebastian Sturm</author>
    <author>Isabell Wirth</author>
    <author>Johannes Paulus</author>
    <author>Markus H. Zink</author>
    <author>Andreas Küchler</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
  </doc>
  <doc>
    <id>1616</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Hannover</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Ageing Condition Assessment of 400 kV OIP Generator Transformer Bushings</title>
    <parentTitle language="eng">17th ISH International Symposium on High Voltage Engineering</parentTitle>
    <author>Markus H. Zink</author>
    <author>Frank Berger</author>
    <author>V. Klipfel</author>
    <author>Andreas Küchler</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="zink">Markus H. Zink</collection>
    <collection role="ddc" number="621">Angewandte Physik</collection>
  </doc>
  <doc>
    <id>1117</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>276</pageFirst>
    <pageLast>280</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Philadelphia, Pennsylvania, USA</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Interaction of Pressboard with Impregnating Fluids in HVDC Insulation Systems</title>
    <parentTitle language="eng">IEEE Electrical Insulation Conference</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>W. Exner</author>
    <author>Ch. Krause</author>
    <author>M. Liebschner</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1108</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName/>
    <publisherPlace>Pilsen, Czech Repbulic</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Dielectric Behaviour of HVDC Insulating Materials, Polarization and Conduction Processes in Mineral Oil and in Pressboard Impregnated with Different Fluids</title>
    <parentTitle language="eng">19th International Symposium on High Voltage Engineering</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>M. Liebschner</author>
    <author>Frank Berger</author>
    <author>W. Exner</author>
    <author>Ch. Krause</author>
    <author>R. Fritsche</author>
    <author>R. Wimmer</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1119</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>27</pageFirst>
    <pageLast>29</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Bremen</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Pressboard in HVDC Transformer Insulation</title>
    <parentTitle language="eng">SIP2013 International Conference Science in Practice</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>Frank Berger</author>
    <author>W. Exner</author>
    <author>Ch. Krause</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1136</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName/>
    <publisherPlace>Ilmenau</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Oil Ducts and Solid Insulation in Barrier Systems at HVDC Stresses</title>
    <parentTitle language="eng">54th IWK Internationales Wissenschaftliches Kolloquium Ilmenau</parentTitle>
    <author>Andreas Küchler</author>
    <author>M. Liebschner</author>
    <author>Ch. Krause</author>
    <author>B. Heinrich</author>
    <author>C. Leu</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1129</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName/>
    <publisherPlace>Hannover</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Ageing Condition Assessment of 400 kV OIP Generator Transformer Bushings</title>
    <parentTitle language="eng">17th ISH International Symposium on High Voltage Engineering</parentTitle>
    <author>Andreas Küchler</author>
    <author>M. Zink</author>
    <author>Frank Berger</author>
    <author>V. Klipfel</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1130</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Köln</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Interaktion von Ölspalten und fester Isolation in HGÜ-Barrieren-systemen</title>
    <parentTitle language="deu">ETG-Fachbericht 125</parentTitle>
    <subTitle language="deu">ETG-Fachtagung „Isoliersysteme bei Gleich- und Mischfeldbeanspruchung“</subTitle>
    <author>Andreas Küchler</author>
    <author>M. Liebschner</author>
    <author>E. Zerr</author>
    <author>B. Heinrich</author>
    <author>Ch. Krause</author>
    <author>Ph. Schmitt</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1143</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Würzburg</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Einfluss von Grenzflächen auf das dielektrische Verhalten von HGÜ-Isoliersystemen</title>
    <parentTitle language="deu">ETG-Fachbericht 112</parentTitle>
    <subTitle language="deu">ETG-Fachtagung „Grenzflächen in elektrischen Isoliersystemen“</subTitle>
    <author>Andreas Küchler</author>
    <author>M. Liebschner</author>
    <author>C. Krause</author>
    <author>B. Heinrich</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1109</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>61</pageFirst>
    <pageLast>64</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Seattle, Washington, USA</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Influence of Board Density on the Conductivity of Oi-Impregnated Pressboard for HVDC Insulation Systems</title>
    <parentTitle language="eng">IEEE Electrical Insulation Conference</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>W. Exner</author>
    <author>Ch. Krause</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1198</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>7</pageLast>
    <pageNumber/>
    <edition/>
    <issue>2</issue>
    <volume>4</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Conductivity of Pressboard for HVDC Insulation Systems</title>
    <parentTitle language="eng">IJECES International Journal of Electrical and Computer Engineering Systems</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>S. Harrer</author>
    <author>Frank Berger</author>
    <author>M. Liebschner</author>
    <author>Ch. Krause</author>
    <author>W. Exner</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1613</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>article</type>
    <publisherName/>
    <publisherPlace>Dresden</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Kompensation des Temperatureinflusses auf dielektrische Messungen im Zeitbereich zur Beschreibung von Isolierwerkstoffen</title>
    <parentTitle language="deu">ETG-Fachtagung „Grenzflächen in elektrischen Isoliersystemen“</parentTitle>
    <author>Markus H. Zink</author>
    <author>Andreas Küchler</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="zink">Markus H. Zink</collection>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
  </doc>
  <doc>
    <id>4146</id>
    <completedYear/>
    <publishedYear>2018</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Berücksichtigung von Leitungs- und Polarisationsmechanismen in transienten FEM-Simulationen von HGÜ-Isoliersystemen</title>
    <abstract language="eng">The calculation of electrical field distributions in insulation systems for high voltage direct current (HVDC) transmission using the finite element method (FEM) usually only considers the dielectric properties in the form of permittivities and conductivities. Due to not sufficiently well simulated transient processes, state of the art is considering the polarization processes by equivalent network models. The application and implementation of polarization mechanisms in a FEM soft- ware closes this gap and allows calculating the electric field distribution more precisely. An implementation of additional differential equations, according to the RC-network model, describing the field dependent polarization mechanisms, are complementing the displacement and conduction current. Material equations and their parameters are determined by measuring the polarization and depolarization currents (PDC). These equations are necessary for both the RC-network models and the differential equations for the FEM. They can be adapted to the actual temperatures in the insulation system. Hence, the necessarily multidimensional electric field calculations of complex insulation systems with stationary or transient temperature-gradients are possible. The described calculation method is verified by reactionless fieldmill voltmeter measurements of transient voltage profiles at the grading foils of modified high voltage DC-bushings. A better accuracy is achieved for the simulation of transient and stationary potential distributions.</abstract>
    <abstract language="deu">Bei der Berechnung elektrischer Feldverteilungen in Isoliersystemen für die Hochspannungsgleichstromübertragung (HGÜ) mit Hilfe der Finiten Elemente Methode (FEM) werden die dielektrischen Eigenschaften bisher meist in Form von Permittivitäten und Leitfähigkeiten berücksichtigt. Da die transienten Verläufe nicht ausreichend genau abgebildet werden, ist Stand der Technik die Polarisationsvorgänge exakter durch Netzwerkmodelle nachzubilden. Durch Implementierung von Polarisationsmechanismen in einem FEM-Programm wurde diese Lücke geschlossen und es können nun elektrische Feldverteilungen vor allem im transienten Zustand wesentlich präziser berechnet werden. In Analogie zum RC-Netzwerkmodell werden hierfür zusätzlich zu den Gleichungen, die die feldabhängigen Verschiebungs- und Leitungsströme beschreiben, weitere Differentialgleichungen eingesetzt, welche die ebenfalls feldabhängigen Polarisationsströme abbilden. Die Materialfunktionen und ihre Parameter werden durch Messung von Polarisations- und Depolarisationsströmen (PDC) ermittelt. Diese Gleichungen werden sowohl für die RC-Netzwerkmodelle als auch für die Aufstellung der Differentialgleichungen für die FEM benötigt. Sie können unmittelbar auf die am jeweiligen Ort im Isoliersystem herrschende Temperatur umgerechnet werden. Somit sind transiente elektrische Feldberechnungen auch für komplexe Isoliersysteme möglich, die sich nur durch mehrdimensionale FEM-Modelle abbilden lassen und in denen oftmals stationäre oder transiente Temperaturgradienten vorliegen. Das beschriebene Berechnungsverfahren wird durch die rückwirkungsfreie Messung transienter Potentialverläufe an den Steuerbelägen von entsprechend modifizierten kondensatorgesteuerten Hochspannungsdurchführungen verifiziert. Dabei kann eine höhere Übereinstimmung der transienten und stationären Potentialverläufe zwischen Simulation und Messung erzielt werden.</abstract>
    <parentTitle language="deu">VDE-Hochspannungstechnik 2018, Berlin</parentTitle>
    <identifier type="url">https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8576769</identifier>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Isabell Wirth</author>
    <author>Sebastian Sturm</author>
    <author>Andreas Küchler</author>
    <author>Markus H. Zink</author>
    <author>Frank Berger</author>
    <author>Tim Schnitzler</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
  </doc>
  <doc>
    <id>1615</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>article</type>
    <publisherName/>
    <publisherPlace>Fulda</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Der Einfluss von Temperatur und Streukapazität auf diagnostische Kapazitäts- und Verlustfaktormessungen von 400 kV-Hochspannungstransformatordurchführungen</title>
    <parentTitle language="deu">ETG-Fachtagung „Diagnostik elektrischer Betriebsmittel“</parentTitle>
    <author>Markus H. Zink</author>
    <author>V. Klipfel</author>
    <author>Frank Berger</author>
    <author>Andreas Küchler</author>
    <author>S. Voll</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="zink">Markus H. Zink</collection>
    <collection role="ddc" number="621">Angewandte Physik</collection>
  </doc>
  <doc>
    <id>4141</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
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    <type>conferenceobject</type>
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    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Measurements and calculations of critical thermal and electrical stress conditions for HVDC bushings</title>
    <parentTitle language="eng">20th International Symposium on High Voltage Engineering, Buenos Aires, 2017</parentTitle>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Isabell Wirth</author>
    <author>Nadja Heßdörfer</author>
    <author>Andreas Küchler</author>
    <author>Markus H. Zink</author>
    <author>Achim Langens</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
  </doc>
  <doc>
    <id>4145</id>
    <completedYear/>
    <publishedYear>2018</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
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    <type>conferenceobject</type>
    <publisherName/>
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    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Elektrische Feldverteilung und Polarisationsströme in HGÜ Durchführungen</title>
    <parentTitle language="deu">Fachtagung Polymere Isolierstoffe und ihre Grenzflächen, Zittau, 2018</parentTitle>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Isabell Wirth</author>
    <author>Andreas Küchler</author>
    <author>Markus H. Zink</author>
    <author>Frank Berger</author>
    <author>Achim Langens</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</collection>
  </doc>
  <doc>
    <id>1110</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>268</pageFirst>
    <pageLast>273</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName/>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Einfluss von Temperatur und Ligningehalt auf die elektrische Leitfähigkeit von Pressspan als HGÜ-Isolierwerkstoff</title>
    <parentTitle language="deu">6. RCC-Fachtagung „Werkstoffe zur Anwendung in der el. Energietechnik unter den besonderen Anforderungen der HGÜ“</parentTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>S. Harrer</author>
    <author>Ch. Krause</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1114</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Leitfähigkeit von Pressspan als diagnostische Kenngröße für HGÜ-Betriebsmittel</title>
    <parentTitle language="deu">ETG-Fachbericht 144</parentTitle>
    <subTitle language="deu">ETG-Fachtagung Diagnostik Elektrischer Betriebsmittel</subTitle>
    <author>Andreas Küchler</author>
    <author>F. Schober</author>
    <author>S. Harrer</author>
    <author>T. Wolfinger</author>
    <author>Ch. Krause</author>
    <author>W. Exner</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
  <doc>
    <id>1118</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>VDE</publisherName>
    <publisherPlace>Dresden</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Kompensation des Temperatureinflusses auf dielektrische Messungen im Zeitbereich zur Beschreibung von Isolierwerkstoffen</title>
    <parentTitle language="deu">ETG-Fachbericht 140</parentTitle>
    <subTitle language="deu">ETG-Fachtragung „Grenzflächen in elektrischen Isoliersystemen“</subTitle>
    <author>Andreas Küchler</author>
    <author>M. Zink</author>
    <author>Frank Berger</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
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