摘 要:特高压输电线路绝缘子串电压分布极不均匀,均压环的优化设计对于改善绝缘子端部场强和改变电压分布具有重要意义.应用三维有限元法分别对1 000 kV特高压交流线路两联、三联和六联耐张串进行了电场计算,计算中考虑了杆塔、导线对电场分布的影响.通过不同屏蔽深度的均压环对电压分布影响的讨论和4种不同形式均压环的对比,建议1 000 kV特高压交流线路耐张串采用管径为120 mm的跑道环,圆形部分中心径为1 000 mm,联接距根据绝缘子串中心间距决定,放置在第3、4片绝缘子之间.
关键词:特高压;耐张串;均压环;电场
分类号:TM216 文献标识码:B
文章编号:1004-9649(2007)12-0043-05
The optimization of grading ring design of insulator string for 1 000 kV UHV AC lines based on finite-element method
DENG Tao ZHAO Zhi-gang LI Peng SU Zhi-yi FAN Jian-bin
作者简介:邓桃(1982-),女,四川成都人,硕士,从事高压设备和输变电技术研究.E-mail:dengtao@epri.ac.cn
作者单位:邓桃(中国电力科学研究院,北京,100085)
赵志刚(中国电力科学研究院,北京,100085)
李鹏(中国电力科学研究院,北京,100085)
宿志一(中国电力科学研究院,北京,100085)
范建斌(中国电力科学研究院,北京,100085)
参考文献:
[1]王斌,彭宗仁.500 kV线路绝缘子电压分布的有限元法计算[J].电瓷避雷器,2003(1):13-15.WANG Bin,PENG Zong-ren.A finite element method for the calculation of the voltage distribution along the 500 kV line insulators[J].Insulators and Surge Arresters,2003 (1):13-15.
[2]沈鼎申,张孝军,万启发,等.750kV线路绝缘子串电压分布的有限元计算[J].电网技术,2003,27(12):54-57.SHEN Ding-shen,ZHANG Xiao-jun,WAN Qi-fa,et al.Calculation of voltage distribution along insulator strings of 750 kV by finite element method[J].Power System Technology,2003,27 (12):54-57.
[3]李鹏,范建斌,李光范,等.1 000 kV级特高压交流线路绝缘子串电位分布计算和均压环设计[J].中国电力,2006,39(10):33-36.LI Peng,FAN Jian-bin,LI Guang-fan,et al.Electric field distribution calculation and grading ring design of insulators string for 1 000 kV UHV AC lines[J].Electric Power,2006,39(10):33-36
[4]许中,钟连宏,谷莉莉.特高压线路绝缘子串电压分布测试方法初探[J].高电压技术,1998,24(4):59-63.XU Zhong,ZHONG Lian-hong,GU Li-li.The measurement method of voltage distribution on insulator strings of the UHV lines[J].High Voltage Engineering,1998,24 (4):59-63.
[5]丁一正,张俊兰,陈雄一,等.500kV线路绝缘子串分布电压的现场实测与分析[J].中国电力,2000,33(2):45-47.DING Yi-zheng,ZHANG Jun-lan,CHEN Xiong-yi,et al.Field measurement and analysis of voltage distribution on 500 kV transmission line insulator strings[J].Electric Power,2000,33 (2):45-47.
[6]范建斌,武雄,黄志秋,等.Y型绝缘子串交流和直流电压分布特性[J].电网技术,2007,31(14):6-9.FAN Jian-bin,WU Xiong,HUANG Zhi-qiu,et al.Research on voltage distribution of Y-type insulator strings under AC and DC condition[J].Power System Technology,2007,31 (14):6-9.
[7]毛凤麟,李庭章.合成绝缘子沿面场强及电位分布试验研究[J].西北电力技术,2000(1):6-8.MAO Feng-lin,LI Ting-zhang.Test and research on surface field strength and level distribution of synthetic insulators[J].Northwest China Electric Power,2000 (1):6-8.
[8]司马文霞,杨庆,孙才新,等.基于有限元和神经网络方法对超高压合成绝缘子均压环结构优化的研究[J].中国电机工程学报,2005,25(17):115-120.SIMA Wen-xia,YANG Qing,SUN Cai-xin,et al.Optimization of corona ring design for EHV composite insulator using finite element and neural network method[J].Proceedings of the CSEE,2005,25 (17):115-120.
|