<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>4140</id>
    <completedYear/>
    <publishedYear>2015</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">Messung elektrischer und thermischer Transienten an Hochspannungsgleichstromdurchführungen</title>
    <parentTitle language="deu">Highvolt Kolloquium, Dresden, 2015 (Poster)</parentTitle>
    <author>Isabell Wirth</author>
    <author>Andreas Reumann</author>
    <author>Markus H. Zink</author>
    <author>Andreas Küchler</author>
    <author>Achim Langens</author>
    <author>Tim Schnitzler</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="institutes" number="fm">Fakultät Maschinenbau</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>260</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>62</pageFirst>
    <pageLast>66</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">FEM model for describing the dielectric behavior of oil-impregnated pressboard under DC stresses</title>
    <abstract language="eng">According to the worldwide growing demand for electric energy, it is necessary to construct safe and efficient power systems. HVDC (high voltage direct current) applications become more and more important due to larger distances for the energy transportation and the increasing demand for reactive power transportation. Appropriate insulation materials, i.e. mineral oil and pressboard, are widely used in HVDC components, mainly in power transformers though the knowledge about dielectric behavior of oil-impregnated pressboard under DC stresses in time domain is not sufficient. In this paper, a Finite Element Method (FEM) model is presented to describe the electrical conduction behavior of the material by separate consideration of mineral oil and pressboard. With this model the electric potential distribution under DC stress was simulated to analyze polarization and electrical conduction. The model parameters volume ratio as well as angle variations of FEM model are investigated and their influences on the current through the model are evaluated. Furthermore, geometrical and physical parameters are estimated and the results are compared to currents that are measured on oil-impregnated pressboard samples in time domain.</abstract>
    <parentTitle language="eng">Papers of 33rd International Scientific Conference "Science in Practice"</parentTitle>
    <identifier type="urn">urn:nbn:de:bvb:863-opus-2609</identifier>
    <licence>Creative Commons - Namensnennung-Keine kommerzielle Nutzung-Weitergabe unter gleichen Bedingungen</licence>
    <author>Andreas Krieg</author>
    <author>Gjergj Lala</author>
    <author>Fabian Schober</author>
    <author>Johannes Wiener</author>
    <author>Johannes Paulus</author>
    <author>Andreas Küchler</author>
    <author>Markus H. Zink</author>
    <author>Marcus Liebschner</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>electrical conduction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM simultation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>HVDC</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>polarization</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>oil-impregnated pressboard</value>
    </subject>
    <collection role="institutes" number="ieht">Institut für Energie- und Hochspannungstechnik (IEHT)</collection>
    <collection role="Regensburger_Klassifikation" number="ZG - ZS">Technik</collection>
    <thesisPublisher>Hochschule für Angewandte Wissenschaften Würzburg-Schweinfurt</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-fhws/files/260/FEM_Model_pressboard_DC_stresses.pdf</file>
  </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>1113</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Schweinfurt</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">FEM model for describing the dielectric behavior of oil-impregnated pressboard under DC stresses</title>
    <parentTitle language="eng">33rd International Conference “Science in Practice”</parentTitle>
    <subTitle language="eng">SIP 2015</subTitle>
    <identifier type="url">http://permalink.bibkatalog.de/BV042665355</identifier>
    <author>Andreas Küchler</author>
    <author>A. Krieg</author>
    <author>G. Lala</author>
    <author>F. Schober</author>
    <author>J. Wiener</author>
    <author>J. Paulus</author>
    <author>Markus H. Zink</author>
    <author>M. Liebschner</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>1107</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">Influence of Water Content of Cellulosic Material on Dielectric Behaviour of HVDC insulation</title>
    <parentTitle language="eng">19th International Symposium on High Voltage Engineering</parentTitle>
    <author>Andreas Küchler</author>
    <author>S. Harrer</author>
    <author>F. Schober</author>
    <author>T. Staab</author>
    <author>G. Sextl</author>
    <author>W. Exner</author>
    <author>Ch. Krause</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="kulke">Dieter Kulke</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>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>1111</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>12</pageFirst>
    <pageLast>50</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">Ausbildung und Steuerung elektrischer Felder bei Gleichspannungsbeanspruchung</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>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
    <collection role="Autoren" number="küchler">Andreas Küchler</collection>
  </doc>
</export-example>
