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Arrester-current based on-line MOSA condition assessment using a new approach.

機(jī)譯：使用新方法基于避雷器電流的在線MOSA狀態(tài)評(píng)估。

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摘要

The degradation of metal oxide surge arresters may be detected by consideration of the resistive component of arrester current. In order to obtain this component, accurate knowledge of the voltage is essential which is difficult in practice. To get around this difficulty a probe-based method was devised in the late eighties and an instrument developed based on that method. In this method the third harmonic component of the resistive current is computed and used as a diagnostic tool. The errors associated with this method have been found to be due to probe positioning and the presence of voltage harmonics.; An alternative and simpler software-based iterative method of obtaining the resistive component has been suggested in literature which relies on the fact that the phase shift between the resistive and capacitive components of arrester current is constant; knowledge of the applied voltage is not required to implement this method. Furthermore, this method does not rely on information gathered from probes and is therefore free of probe related errors. Also, it is claimed that the influence of voltage harmonics is relatively small.; In this thesis, the phase shift criterion has been verified and utilized but in a different manner to obtain the resistive current. The results are compared with the Compensation Technique (Bench Mark Method). (Abstract shortened by UMI.)
機(jī)譯：可以通過(guò)考慮避雷器電流的電阻分量來(lái)檢測(cè)金屬氧化物電涌避雷器的退化。為了獲得該分量，對(duì)電壓的準(zhǔn)確了解是必不可少的，這在實(shí)踐中是困難的。為了解決這個(gè)難題，在八十年代后期設(shè)計(jì)了一種基于探針的方法，并根據(jù)該方法開發(fā)了一種儀器。在這種方法中，計(jì)算了電阻電流的三次諧波分量，并將其用作診斷工具。已經(jīng)發(fā)現(xiàn)與該方法有關(guān)的誤差是由于探頭的位置和電壓諧波的存在。在文獻(xiàn)中已經(jīng)提出了另一種基于電阻的簡(jiǎn)化軟件迭代方法，該方法基于避雷器電流的電阻分量和電容分量之間的相移是恒定的事實(shí)。無(wú)需了解所施加的電壓即可實(shí)施此方法。此外，該方法不依賴于從探針收集的信息，因此沒有探針相關(guān)的錯(cuò)誤。另外，聲稱電壓諧波的影響相對(duì)較小。在本文中，已經(jīng)驗(yàn)證并利用了相移準(zhǔn)則，但是以不同的方式獲得了電阻電流。將結(jié)果與補(bǔ)償技術(shù)（基準(zhǔn)標(biāo)記法）進(jìn)行比較。 （摘要由UMI縮短。）

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  • 作者

    Karawita, Chandana.;

  • 作者單位

    University of Manitoba (Canada).;

  • 授予單位 University of Manitoba (Canada).;
  • 學(xué)科 Engineering Electronics and Electrical.
  • 學(xué)位 M.Sc.
  • 年度 2006
  • 頁(yè)碼 65 p.
  • 總頁(yè)數(shù) 65
  • 原文格式 PDF
  • 正文語(yǔ)種 eng
  • 中圖分類 無(wú)線電電子學(xué)、電信技術(shù);
  • 關(guān)鍵詞

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