Time and Space Transition of DC Electric Field Distributions in Oil-Pressboard Composite Insulation in AC/DC Converter Transformer

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI:10.1109/ICDL.2019.8796800

R. Nakane, K. Kato, N. Hayakawa, H. Okubo

{"title":"Time and Space Transition of DC Electric Field Distributions in Oil-Pressboard Composite Insulation in AC/DC Converter Transformer","authors":"R. Nakane, K. Kato, N. Hayakawa, H. Okubo","doi":"10.1109/ICDL.2019.8796800","DOIUrl":null,"url":null,"abstract":"It is necessary to enhance an HVDC electrical insulation performance for further introduction of DC electric power systems. In AC/DC converter transformers under DC application, the electric field distributions are distorted due to the deposited charge on pressboard (PB). However, DC electric field stress in oil-PB composite insulation has not yet been clarified in detail. In this paper, we investigated the time and space dependent characteristics of DC electric field stress in oil from DC-on (initial state) to DC steady-state in oil-PB composite insulation systems. As a result, we quantitatively clarified that DC electric field stress strongly depends on the elapsed time and the location in the electric field space in oil. In particular, it was found that the most severe electric field stress in oil for the electrical insulation performance may emerge during the time transition process between initial DC-on to DC steady-state, using an insulated conductor lead and an actual AC/DC converter transformer model.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICDL.2019.8796800","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

It is necessary to enhance an HVDC electrical insulation performance for further introduction of DC electric power systems. In AC/DC converter transformers under DC application, the electric field distributions are distorted due to the deposited charge on pressboard (PB). However, DC electric field stress in oil-PB composite insulation has not yet been clarified in detail. In this paper, we investigated the time and space dependent characteristics of DC electric field stress in oil from DC-on (initial state) to DC steady-state in oil-PB composite insulation systems. As a result, we quantitatively clarified that DC electric field stress strongly depends on the elapsed time and the location in the electric field space in oil. In particular, it was found that the most severe electric field stress in oil for the electrical insulation performance may emerge during the time transition process between initial DC-on to DC steady-state, using an insulated conductor lead and an actual AC/DC converter transformer model.

查看原文本刊更多论文

交直流换流变压器油压板复合绝缘直流电场分布的时空变化

为了进一步引入直流电力系统，有必要提高高压直流电气绝缘性能。在直流作用下的交/直流换流变压器中，由于压板上的电荷沉积导致了电场分布的畸变。然而，油- pb复合绝缘材料中的直流电场应力尚未得到详细的阐明。本文研究了油- pb复合绝缘系统中油中直流电场应力从直流(初始状态)到直流稳态的时空变化特征。因此，我们定量地阐明了直流电场应力在很大程度上取决于所经过的时间和在油中的电场空间中的位置。特别是，在使用绝缘导体引线和实际AC/DC换流变压器模型时，发现油中对电气绝缘性能影响最大的电场应力可能出现在初始直流导通到直流稳态的时间过渡过程中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)

自引率

0.00%

发文量