振荡型雷电冲击电压下变压器绕组电压分布特性
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摘要
利用振荡型冲击电压进行变压器冲击耐压试验具有波形易于调节、产生效率高的优点,为了研究振荡型类雷电冲击电压和标准雷电冲击电压波形在变压器绕组中分布特性的差异,利用能够产生不同类型冲击电压的发生装置,实际测量了变压器绕组各出线端的电压波形,研究和分析了其分布特性及影响规律。结果表明,相比标准雷电冲击电压波形,振荡型雷电冲击电压波形畸变更为明显,其对变压器绕组首端位置主绝缘和纵绝缘的考核严酷程度更高。
The transformer impulse withstand voltage test using the oscillating impulse voltage has the advantages ofeasy waveform adjustment and high efficiency. In order to study the difference of voltage distribution characteristicsof transformer winding under oscillating and standard impulse voltage waveform,the voltage waveforms of winding intransformer are measured using the voltage generator which can generate different lightning impulse voltage wave-forms. The voltage distribution characteristics and influence law are studied and analyzed. The study results shownthat the oscillating lightning impulse voltage waveform distortion obviously than the standard lightning impulse volt-age waveform,and it is more stringent assessment to the main insulation and longitudinal insulation of the transformer winding terminal position.
The transformer impulse withstand voltage test using the oscillating impulse voltage has the advantages ofeasy waveform adjustment and high efficiency. In order to study the difference of voltage distribution characteristicsof transformer winding under oscillating and standard impulse voltage waveform,the voltage waveforms of winding intransformer are measured using the voltage generator which can generate different lightning impulse voltage wave-forms. The voltage distribution characteristics and influence law are studied and analyzed. The study results shownthat the oscillating lightning impulse voltage waveform distortion obviously than the standard lightning impulse volt-age waveform,and it is more stringent assessment to the main insulation and longitudinal insulation of the transformer winding terminal position.
引文
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[12]李军浩,车斌,林敏,等.振荡型雷电冲击电压下SF6气体中悬浮电位缺陷的局部放电特性研究[J].绝缘材料,2014,47(4):62-65.LI Junhao,CHE Bin,LIN Min,et al. Partial discharge characteristics of floating potential defect in SF6 gas under oscillating lightning impulse voltage[J]. Insulating Materials,2014,47(4):62-65.
[2]李兴旺,卢启付,吕鸿,等.雷电冲击耐压过程中GIS局部放电特高频检测有效性研究[J].高压电器,2013,49(10):72-76.LI Xingwang,LU Qifu,LYU Hong,et al. GIS partial discharge detection via ultra-high frequency signal in lightning impulse process[J]. High Voltage Apparatus,2013,49(10):72-76.
[3]胡伟,陈勇,万启发,等.三峡550 k V GIS的雷电冲击耐受试验方法[J].高电压技术,2011,37(4):883-887.HU Wei,CHEN Yong,WAN Qifa,et al. Test on lighting impulse withstand voltage of the three gorges right bank550 kV GIS substation[J]. High Voltage Engineering,2011,37(4):883-887.
[4]郭治锋,赵学风,吴磊,等.振荡型冲击电压下GIS绝缘气隙模型的局部放电研究[J].陕西电力,2011,39(3):21-25.GUO Zhifeng,ZHAO Xuefeng,WU Lei,et al. Partial discharge of GIS insulation void models under oscillating impulse voltage[J]. Shaanxi Electric Power,2011,39(3):21-25.
[5]刘军,张安红. 110 kV、220 kV变压器高压绕组冲击电压分析[J].变压器,2008,45(10):15-23.LIU Jun,ZHANG Anhong. Impulse voltage analysis of 110and 220 k V transformer HV windings[J]. Transformer,2008,45(10):15-23.
[6]王赞基,杨钰.大型电力变压器线圈中特快速暂态电压分布的计算[J].高电压技术,2010,36(4):918-925.WANG Zanji,YANG Yu. Calculation of very fast transient overvoltage distributions in large power transformer windings[J]. High Voltage Engineering,2010,36(4):918-925.
[7]胡文堂,李思南,万启发.变压器绕组的陡波电压分布特性[J].高电压技术,2006,32(11):57-60.HU Wentang,LI Sinan,WAN Qifa. Steep-front impulse voltage distribution characteristics of transformer windings[J].High Voltage Engineering,2006,32(11):57-60.
[8]王喆,张乔根,王同磊,等.非标准雷电冲击电压下油纸绝缘击穿特性[J].高电压技术,2014,40(9):2931-2937.WANG Zhe,ZHANG Qiaogen,WANG Tonglei,et al. Oilpaper insulation breakdown characteristics under non-standard lightning impulse voltages[J]. High Voltage Engineering,2014,40(9):2931-2937.
[9]耿屹楠,庄池杰,曾嵘,等.正极性雷电冲击电压下流注起始特性研究[J].中国电机工程学报,2012,32(19):148-153.GENG Yinan,ZHUANG Chijie,ZENG Rong,et al. Streamer inception characteristic under positive lighting impulse voltage[J]. Proceedings of the Chinese Society for Electrical Engineering,2012,32(19):148-153.
[10]范建斌,郑健超,王来.雷电冲击电压下沿面闪络特性的研究[J].电网技术,2003,27(2):13-16.FAN Jianbin,ZHENG Jianchao,WANG Lai. Flashover characteristic along surface under lightning impulse voltage[J].Power System Technology,2003,27(2):13-16.
[11]张宇萌,张喜乐,张萍,等.电力变压器冲击电压分布与传递过电压的仿真研究[J].变压器,2015,52(6):33-37.ZHANG Yumeng,ZHANG Xile,ZHANG Ping,et al. Simulation research of impulse voltage distribution and transfer overvoltage of power transformer[J]. Transformer,2015,52(6):33-37.
[12]李军浩,车斌,林敏,等.振荡型雷电冲击电压下SF6气体中悬浮电位缺陷的局部放电特性研究[J].绝缘材料,2014,47(4):62-65.LI Junhao,CHE Bin,LIN Min,et al. Partial discharge characteristics of floating potential defect in SF6 gas under oscillating lightning impulse voltage[J]. Insulating Materials,2014,47(4):62-65.