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                    1. [1]宣耀偉,胡 凱,楊豐源,等.XLPE直流電纜典型缺陷局部放電特性研究[J].高壓電器,2019,55(07):173-180.[doi:10.13296/j.1001-1609.hva.2019.07.025]
                       XUAN Yaowei,HU Kai,YANG Fengyuan,et al.Research on Partial Discharge Characteristics of Typical Defects in XLPE Cables Under DC Voltage[J].High Voltage Apparatus,2019,55(07):173-180.[doi:10.13296/j.1001-1609.hva.2019.07.025]
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                      XLPE直流電纜典型缺陷局部放電特性研究()
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                      《高壓電器》[ISSN:1001-1609/CN:61-11271/TM]

                      卷:
                      第55卷
                      期數:
                      2019年07期
                      頁碼:
                      173-180
                      欄目:
                      研究與分析
                      出版日期:
                      2019-07-31

                      文章信息/Info

                      Title:
                      Research on Partial Discharge Characteristics of Typical Defects in XLPE Cables Under DC Voltage
                      作者:
                      宣耀偉1 胡 凱1 楊豐源2 盛戈皞2 鄭新龍1 樂彥傑1
                      (1. 國網浙江省電力公司舟山供電公司, 浙江 舟山 316021; 2. 上海交通大學電氣工程系, 上海 200240)
                      Author(s):
                      XUAN Yaowei1 HU Kai1 YANG Fengyuan2 SHENG Gehao2 ZHENG Xinlong1 LE Yanjie1
                      (1. State Grid Zhoushan Power Supply Company, Zhejiang Zhoushan 316021, China; 2. Department of Electrical Engineering,Shanghai Jiao Tong University, Shanghai 200240, China)
                      關鍵詞:
                      局部放電 XLPE直流電纜 高頻電流法 指紋特征
                      Keywords:
                      partial discharge (PD) XLPE cable under DC voltage high frequency current method(HFCT) fingerprint characteristics
                      DOI:
                      10.13296/j.1001-1609.hva.2019.07.025
                      摘要:
                      局部放電是表征電力設備絕緣狀態的最有效的手段之一,然而關于直流電壓下XLPE電纜典型絕緣缺陷局部放電特征的研究較少。文中首先深入分析了直流下複合絕緣材料局部放電機理,總結了XLPE電纜常見缺陷類型及其原因。使用單芯XLPE電纜及其預制式接頭制作了金屬毛刺電暈缺陷、應力錐處半導電層沿面放電缺陷以及絕緣交界面氣隙放電缺陷,在直流電壓下進行階梯式加壓試驗。基于高頻電流法采集局部放電數據,獲得了各缺陷不同放電嚴重階段的多種典型特征,包括放電量-時間間隔-放電重複率三維圖譜,前序放電量、前序放電時間間隔與當前放電量相關性散點圖。提取了典型統計圖譜的28個指紋特征,並使用RBF神經網絡進行模式識別獲得了較好識別正確率,從而驗證了特征有效性。
                      Abstract:
                      Partial discharge (PD) is one of the most effective means to characterize the insulation states of power equipment. However, there are few studies on partial discharge characteristics of typical insulation defects in XLPE cables under DC voltage. Firstly, the mechanism of partial discharge of composite insulation under DC voltage is deeply studied in this paper. And common types of defects and their causes in the XLPE cable are summarized. Three kinds of defect models are designed using XLPE cable and its prefabricated joints, including corona discharge, surface discharge at the stress cone, and air gap discharge at the insulation interface. The experiment is tested under step-wise DC voltage. Several typical features of different severity stages of the discharges are obtained based on the PD data measured by High frequency current method(HFCT), including the three-dimensional map of discharge magnitude-time interval-discharge repetition rate, the scatter plots of previous discharge magnitude or previous time interval with the current discharge magnitude. 28 fingerprint characteristics are obtained and a good recognition accuracy can be obtained based on the RBF neural network.

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                      備注/Memo

                      備注/Memo:
                      宣耀偉(1961—),男,高工,主要從事海洋輸電技術研究及電力工程管理等方面的工作。收稿日期:2018-10-05; 修回日期:2019-01-14 基金項目:國家重點研發計劃項目資助(2016YFB0900705);國家電網公司科技項目資助(52110115007J)。 Project Supported by National Key Research and Development Program (2016YFB0900705), the Science and Technology Project of State Grid Corporation(52110115007J).
                      更新日期/Last Update: 2019-07-15