500kV复合绝缘子串并联间隙结构优化研究  

Research on Structure Optimization of 500kV Composite Insulator String Parallel Gap

作　　者：赵淳[1] 许衡[1] 赵深 吴军[1] 王斌 苏杰[1] 任华[1] 

机构地区：[1]南瑞集团公司(国网电力科学研究院),南京211100 [2]国网浙江省电力公司金华供电公司,浙江金华321000

出　　处：《电瓷避雷器》2017年第5期206-211,共6页Insulators and Surge Arresters

摘　　要：运行经验和试验结果表明,现有规程推荐尺寸的并联间隙存在保护失效的情况。提出一种新型的500kV复合绝缘子串并联间隙,采用单球拍-半跑道形状,XC为700 mm,XP为700 mm。经过高压试验,验证了新型并联间隙接闪雷电和转移疏导电弧的能力;采用ANSYS仿真软件,研究了装设新型并联间隙时绝缘子串表面的电场分布;经过对比和优化,提出采用加装均压环的方式,即在高压端加装一个椭圆形均压环和一个圆形均压环,在低压端加装圆形均压环,提升新型并联间隙均匀电场的能力。The experimental results and operant experiences show that the parallel gap recommend- ed by standard can＇ t protect the insulators efficacious. A new kind of parallel gap for the 500kV composite insulators, with the appearance of racket-half athletic track, was proposed. The XC and XP of the new parallel gap are all 700mm.The lightning protection ability of the new parallel gap was certificated by high-voltage experiments. The electric distribution of insulators with the new parallel gap was researched by ANSYS. After comparison and optimization, it is proposed to install an ellipse and a spherical grading rings on the high-pressure side and a spherical one on the low-pressure side could improve the ability to ameliorate the electric distribution of the new parallel gap.

关 键 词：并联间隙 500kV 结构优化 ANSYS 

分 类 号：TM216[一般工业技术—材料科学与工程]