[1]郭 亮,李 哲,李 骁,等.雷电过电压引发电容式电压互感器铁磁谐振特性分析与防护研究[J].电瓷避雷器,2019,(06):147-151,158.[doi:10.16188/j.isa.1003-8337.2019.06.024]
 GUO Liang,LI Zhe,LI Xiao,et al.Analysis and Prevention Research of Ferroresonance in Capacitor Voltage Transformer Caused by Lightning Overvoltage[J].,2019,(06):147-151,158.[doi:10.16188/j.isa.1003-8337.2019.06.024]
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雷电过电压引发电容式电压互感器铁磁谐振特性分析与防护研究()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年06期
页码:
147-151,158
栏目:
避雷器
出版日期:
2019-12-10

文章信息/Info

Title:
Analysis and Prevention Research of Ferroresonance in Capacitor Voltage Transformer Caused by Lightning Overvoltage
作者:
郭 亮1 李 哲1 李 骁2 郭红梅3 刘丽君2 王者龙2 任大为2 刘志美2
(1.国网山东省电力公司, 济南 250100; 2.国网山东省电力公司电力科学研究院, 济南 250003; 3.国网山东省电力公司济阳县供电公司, 济南 251400)
Author(s):
GUO Liang1 LI Zhe1 LI Xiao2 GUO Hongmei3 LIU Lijun2 WANG Zhelong2 REN Dawei2 LIU Zhimei2
(1.State Grid Shandong Electric Power Company, Jinan 250100, China; 2.Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan 250003, China; 3.State Grid Jiyang Power Supply Company, Jinan 251400, China)
关键词:
电容式电压互感器 雷电直击 雷电感应 铁磁谐振 避雷器 避雷线
Keywords:
capacitor voltage transformer direct lightning lightning induction ferroresonance surge arrester ground wire
DOI:
10.16188/j.isa.1003-8337.2019.06.024
摘要:
近年来,电容电压互感器(CVT)在我国电力系统中得到越来越广泛的应用,需要详细研究雷电过电压引发CVT铁磁谐振特性及相应防护措施。通过在EMTP软件中建立35 kV变电站系统模型,分析线路遭受雷电直击或雷电感应时CVT铁磁谐振过电压特性,讨论过电压保护器件和阻尼装置等不同消谐措施的效果,最后分析线路安装避雷器或避雷线对铁磁谐振的抑制效果。研究结果表明:雷电过电压引发的CVT一次侧过电压波形振荡明显,雷电感应情况下过电压频谱范围更宽; CVT一次侧过电压幅值随着雷电流幅值的增加而增大,但雷电流幅值对过电压谐振周期影响不明显; 高压侧分压电容或补偿电抗器两端并联放电间隙能够有效抑制CVT二次侧过电压幅值,但对过电压振荡抑制效果较差; 速饱和阻尼、谐振型阻尼、电阻型阻尼装置均能够抑制CVT二次侧过电压幅值,速饱和阻尼和谐振型阻尼对过电压波形振荡抑制效果更为明显。高压侧线路安装避雷器或避雷线能够抑制雷电直击或雷电感应引发的CVT一次侧过电压,但避雷器安装较密或避雷线接地间隔较短才能取得较好防护效果。
Abstract:
Recently, capacitor voltage transformer(CVT)is more and more widely applied in electric power system of China, so it is necessary to research ferroresonance in CVT caused by lightning overvoltage and its countermeasures. Equivalent model of 35 kV substation system was established in EMTP to analyze characteristics of ferroresonance in CVT caused by lightning overvoltage. Protection effects of overvoltage protection device and damping device were discussed. Finally, influence of installing space of arresters and multi-point grounding spacing of the ground wire were presented. Results show that: waveforms of CVT primary voltage caused by lightning overvoltage show obvious oscillations and voltage caused by lightning induction has wider spectrum. CVT primary voltage increases with the increasing of lightning current amplitude which has no obvious influence on ferroresonance cycle. Discharge gap parallels with divider capacitor or compensation reactor can restrain CVT secondary voltage while seems invalid to the wave oscillation. Quick saturation type, resonant type or resistance type damping device can effectively inhibit CVT secondary voltage and quick saturation type is the most apparent of all three types. Installing line arresters or the ground wire could decreases CVT primary voltage dramatically if installing space of arresters or grounding spacing of the ground wire is appropriate.

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备注/Memo

备注/Memo:
收稿日期:2018-10-10 作者简介:郭亮(1981—),男,高级工程师,研究方向为电力营销。
更新日期/Last Update: 2019-12-10