[1]李熙甯,汲勝昌,崔彥捷,等.水分對交直流複合電壓下油紙絕緣沿面放電特性影響研究[J].高壓電器,2018,54(11):184-193.[doi:10.13296/j.1001-1609.hva.2018.11.027]
 LI Xining,JI Shengchang,CUI Yanjie,et al.Effect of Moisture on Surface Discharge Characteristics of Oil-paper Insulation Under AC-DC Combined Voltage[J].High Voltage Apparatus,2018,54(11):184-193.[doi:10.13296/j.1001-1609.hva.2018.11.027]
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水分對交直流複合電壓下油紙絕緣沿面放電特性影響研究()
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《高壓電器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第54卷
期數:
2018年11期
頁碼:
184-193
欄目:
電力變壓器局部放電檢測及狀態評估
出版日期:
2018-11-05

文章信息/Info

Title:
Effect of Moisture on Surface Discharge Characteristics of Oil-paper Insulation Under AC-DC Combined Voltage
作者:
李熙甯汲勝昌崔彥捷祝令瑜肖堯JedsadaKridsananont
西安交通大學電力設備電氣絕緣國家重點實驗室, 西安 710049
Author(s):
LI Xining JI Shengchang CUI Yanjie ZHU Lingyu XIAO Yao Jedsada Kridsananont
State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
關鍵詞:
交直流複合電壓 油紙絕緣 水分含量 沿面放電
Keywords:
AC-DC combined voltage oil-paper insulation moisture content surface discharge
DOI:
10.13296/j.1001-1609.hva.2018.11.027
文獻標志碼:
A
摘要:
換流變壓器閥側繞組絕緣同時承受交流和直流電壓作用,水分是導致圍屏爬電的重要原因之一,開展水分含量對油紙絕緣沿面放電特性影響的研究具有重大意義。文中利用基于脈沖電流法的局部放電測量系統,在含不同直流分量的交直流複合電壓下,使用典型球—板電極對不同水分含量油紙絕緣試品的沿面放電特征參量和統計譜圖變化規律開展了實驗研究,並與純交流電壓下的結果進行了對比。研究結果表明:隨著紙板中水分含量的不斷升高,起始放電電壓和閃絡電壓均呈現下降趨勢,放電耐受時間不斷縮短;在同一水分含量下,隨著複合電壓中直流分量的不斷增大,起始放電和閃絡電壓則明顯升高,其中純交流電壓下的起始和閃絡電壓均爲最低。利用典型沿面放電統計譜圖可以將油紙絕緣沿面放電發展過程劃分爲4個階段,分別爲起始、發展、嚴重和臨近閃絡階段;高水分含量下各階段沿面放電量Q大幅增加,相鄰兩次放電的時間間隔Δt明顯減少。
Abstract:
The valve side windings of converter transformer withstand complex voltages, including AC and DC combined voltage. Highly damped oil-paper insulation system is respected as the predominant factor of surface discharge phenomena. The present study focuses on the surface discharge characteristics of oil-immersed pressboards with different moisture content, whereas different AC and DC components are applied to the sphere-plane defect model. Discharge parameters and patterns are acquired by detector using pulse current method. Results show that the inception and flashover voltage decrease with the increase of moisture content, and gradually increase under higher DC component voltage. As the damped state in oil-paper sample gets more serious, discharge tolerance time is shorten sharply and higher DC component has a more obvious accelerated effect on the surface discharge. The whole developing process can be divided into four stages. The amplitude Q of surface discharge increases while the time interval Δt decreases at high moistened state.

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備注/Memo

備注/Memo:
收稿日期:2018-05-01; 修回日期:2018-07-09.李熙甯(1994—),男,碩士研究生,主要從事高壓設備局部放電與故障診斷的研究工作。 汲勝昌(1976—),男,教授,博士生導師,主要從事高電壓試驗及電力設備狀態檢測、故障診斷方面的教學和科研工作(通訊作者)。 基金項目:國家重點研發計劃(2016YFB0900804)。 Project Supported by the National Key Research and Development Program of China(2016YFB0900804).
更新日期/Last Update: 2018-11-25