摘要
针对目前微气象参数等与覆冰的相关性分析不全面、不系统,无法确定主要影响因素的问题。统计了贵州电网输电线路覆冰在线监测系统于2008年冬末至2009年春末监测到的线路覆冰状况,指出线性相关分析定量结果与定性分析不符,提出了一种邓氏灰色关联度和灰色斜率关联度相结合的灰色综合关联分析方法,并确定了覆冰和各个参数(导线温度和环境温度、相对湿度、风速等微气象参数等)之间的关联度。结果表明:海拔高度对覆冰的严重程度和持续时间均有一定的影响;环境温度、导线温度、相对湿度和风速均与覆冰存在较大相关性,其中环境温度和导线温度与覆冰的相关性明显强于相对湿度和风速,即温度是影响覆冰的主要因素。
Correlation between local meteorology parameters and the overhead transmission line icing was not comprehensive and systemic currently,so the predominate influential factor on icing could not be confirmed.The overhead transmission line icing status was statistically analyzed,and the data were recorded during the period between November 2008 and May 2009 at Guizhou Power Grid by means of on-line monitoring and precaution system.The result unconformity between line correlation was qualitatively analyzed,moreover,the synthetic grey relational analysis,which combined general relational degree proposed by Deng with slope relational degree,was constructed to realize the relationships among transmission line icing,conductor temperature and local meteorology parameters,such as ambient temperature,relative humidity,wind speed,etc..The results show altitude affects ice cover or duration to some extent.There are relatively conspicuous correlations among transmission line icing,conductor temperature and local meteorology.And the degree of relation between ice cover and conductor temperature or ambient temperature is markedly higher than relative humidity or wind speed,indicating that temperature is the decisive factor among them.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第3期775-781,共7页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724507)
国家“十一五”科技支撑计划(2009BAA23B02)~~
关键词
覆冰
导线温度
环境温度
相对湿度
风速
灰色综合关联分析
icing
conductor temperature
ambient temperature
relative humidity
wind speed
synthetic grey relational analysis
