CAJ | 학술논문

利利用1960-2011年湖北省81个气象站气象观测资料和湖北省2004-2012年220~500 kV高压输电线路覆冰事故资料以及海拔高度、坡度、坡向等9类地形数据信息资料,给出风口、突出山体、迎风坡和背风坡4种特殊地形的判断指标,分析特殊地形因子对电线覆冰的影响,并对湖北省冰区分布图进行地形订正.结果表明:风口判断指标为冬季(当年12月至翌年2月)日均风速大于8 m·s-1的日数超过1.56 d·a-1,迎风坡判断指标为坡向0°~45°或315°~360°且坡度大于10°,背风坡判断指标为坡向135°~225°且坡度大于10°,突出山体判断指标为起伏度大于200 m且海拔高度大于起伏度;4种特殊地形下冰厚订正系数分别为1.75、1.62、0.68和1.82;风口处影响覆冰的主导气象因子为风速,迎风坡处影响覆冰的主导气象因子为降水量,突出山体处影响覆冰的主导气象因子为液水含量,气温对3种特殊地形下的冰厚变化均有显著影响;经过地形订正后的冰区图,能更好地反映鄂西南山区、鄂北中部和西部等地受特殊地形影响而出现的较严重覆冰区.
리이용1960-2011년호북성81개기상참기상관측자료화호북성2004-2012년220~500 kV고압수전선로복빙사고자료이급해발고도、파도、파향등9류지형수거신식자료,급출풍구、돌출산체、영풍파화배풍파4충특수지형적판단지표,분석특수지형인자대전선복빙적영향,병대호북성빙구분포도진행지형정정.결과표명:풍구판단지표위동계(당년12월지익년2월)일균풍속대우8 m·s-1적일수초과1.56 d·a-1,영풍파판단지표위파향0°~45°혹315°~360°차파도대우10°,배풍파판단지표위파향135°~225°차파도대우10°,돌출산체판단지표위기복도대우200 m차해발고도대우기복도;4충특수지형하빙후정정계수분별위1.75、1.62、0.68화1.82;풍구처영향복빙적주도기상인자위풍속,영풍파처영향복빙적주도기상인자위강수량,돌출산체처영향복빙적주도기상인자위액수함량,기온대3충특수지형하적빙후변화균유현저영향;경과지형정정후적빙구도,능경호지반영악서남산구、악북중부화서부등지수특수지형영향이출현적교엄중복빙구.
Based on the meteorological observations at 81 stations from 1960 to 2011, the icing accidents occurred along the 220-500 kV high voltage AC transmission lines from 2004 to 2012 and the 9 kinds of geographic data such as altitude, slope, aspect and so on over Hubei province, we have put forward the icing criteria for wind gap, prominent mountain, windward slope, and leeward slope, analyzed the influence of topographic factors to ice accretion, and made a topographic correction to division of wire icing area in Hubei. Results are as follows. The criteria for wind gap is that the day numbers of daily mean wind speed of greater than 8 m·s-1 exceed 1.56 d·a-1 in winter (from December to February). For the aspect of windward slope it is 0°-45° or 315°-360° and with slope of larger than 10°, while for the aspect of leeward slope it is 135°-225°, with slope of larger than 10°, too. For prominent mountain it is that the topographic undulation is larger than 200 m and with an altitude of greater than undulation. Topographic-correction coefficients of wind gap, windward slope, leeward slope, and prominent moun-tain are 1.75, 1.62, 0.68, and 1.82, respectively. Leading meteorological factors of affecting icing process are wind speed at the meteorological stations located at wind gap, precipitation at the meteorological stations located at windward slope, and liquid water content at the meteorologi-cal stations located at prominent mountain. Air temperature is the most important meteorological factor in all of these three special topogra-phies. The division map of wire icing area in Hubei after the topographic correction can better show the serious icing places in the southwest, central, and west areas of Hubei province affected greatly by special topographies.