摘要
雨凇会严重影响输电线路的安全运行因而受到国内外电力部门的重视,虽然对雨凇的研究有近50 a的历史,但大多数试验都未考虑带电覆冰的实际意义,也没有深入对比研究交流与直流电场对雨凇覆冰特性的影响;利用人工气候实验室模拟了不同电场类型、电场强度下的LGJ-185/25导线雨凇覆冰,研究并对比了交直流电场对雨凇形态、气泡含量,覆冰质量以及覆冰密度等参数的影响机理,结果表明:随着交直流覆冰场强的增加,雨凇冰柱形态、覆冰质量和冰密度会先增大后减小,雨凇气泡含量和粗糙度会逐渐增加;相比交流电场而言,直流场中仅雨凇冰柱的气泡含量较交流场更多,其他参数均较交流电场雨凇覆冰更小;所得结论可为探求交直流电场对雨凇覆冰特性的影响机理提供参考。
Glace icing affects the safety operation of transmission line seriously and appreciated by the power department of foreign and domestic. Although the study on glaze icing as long as 50 years, most of the tests ignore the practical significance of energized icing and there is no in-depth or comparative research on the properties of glaze icing between the AC and DC electric fields. So the artificial climate chamber is used in test to simulate the glaze icing on LGJ-185/25 conductor in the different types and strength of electric field, shapes and bubble content and quality and density of glaze which are affected by AC and DC electric fields are studied and compared in this paper. Test results show that with the increase of AC and DC icing field strength, the morphology and quality and density of glaze will be first increased and then decreased, but the bubble content and rough degree will be raised gradually. Compared to the AC electric field, there are just only more bubble contents in the glaze icicle in the DC electric field while the other parameters are less than AC electric field. The conclusion of this paper can provide reference to explore the influence mechanism of electric field on the characteristics of glaze icing in AC and DC electric fields.
出处
《电网技术》
EI
CSCD
北大核心
2015年第3期867-872,共6页
Power System Technology
基金
国家重点基础研究发展计划(973计划)(2009CB724502
2009CB724501)~~
关键词
交直流电场
雨凇
覆冰特性
带电覆冰
覆冰机理
AC and DC electric fields
glaze
icing characteristics
energized icing
icing mechanism
