环境参数对绝缘子表面覆冰增长的影响

Influence of Environment Parameters on the Icing Accretion on the Surface of Insulator

覆冰严重威胁电力系统的安全运行,国内外对输电线路覆冰机理、增长过程和覆冰闪络特性开展了大量研究,但对绝缘子覆冰增长预测模型及相关试验研究甚少,因此开展了LXP-160玻璃绝缘子在不同覆冰环境参数下其表面覆冰增长的试验研究,分析了温度、水滴颗粒直径(MVD)、风速等对绝缘子表面覆冰增长的影响,得到了采用旋转监测导体覆冰厚度d1、绝缘子表面覆冰厚度d或绝缘子覆冰质量m来表征绝缘子的覆冰程度之间的等价性关系。结果表明:水滴颗粒直径、风速越大或温度越低,绝缘子表面覆冰增长越快,其冰棱越长且越粗;温度对绝缘子覆冰类型有影响,当风速小于0.5m/s、液态水质量浓度110g/m3,MVD为130μm,温度小于-8°C时,绝缘子表面覆冰类型为雨凇,温度为-11°C时,绝缘子表面覆冰类型为硬雾凇;d1、d和m之间关系为d=0.684d11.09和m=0.828lnd1-1.186。研究结果可为揭示绝缘子覆冰机理提供参考。

Icing may threaten the operation safety of power system.We experimentally studied the icing accretion on the surface of glass insulator type of LXP-160under different environment parameters,analyzed the influence of environment parameters such as temperature,median volumetric diameter（MVD）and wind velocity et al.On the icing accretion on the surface of insulator,and obtained an equivalent relation of describing the icing degree of insulator with the ice thickness of rolling conductor monitoring（d1）or ice thickness of the surface of insulator（d）or mass of ice of insulator（m）.The experimental results show that,the more of MVD or velocity or the lower of temperature is,the more icing accretion on the surface of insulator and the longer and thicker of ice ridge will be;temperature may affect the icing style,when the wind velocity is lower than 0.5,the liquid water content is 110g/m3,the MVD is 130μm,and temperature exceeds-8°C,the ice style on the surface of insulator is glaze.When the temperature reaches-11°C,the ice style on the surface of insulator is rime.The relation among the d1,dand mis d =0.684d11.09and m=0.828lnd1-1.186.