CAJ | 학술논문

分析电网覆冰重现期,对于掌握冰灾规律从而指导抗冰工作具有重要指导意义。为此,提出了基于极值I型分布的电网覆冰重现期计算方法,结合97个气象站1951-2008年的覆冰日数观测数据,计算了97个气象站点15a一遇、30a一遇、50a一遇和100a一遇冰灾的覆冰日数,计算结果显示,长沙马坡岭气象站100a一遇的覆冰日数为14.78d。按照特别严重覆冰重现期为11d以上的划分标准,在极值Ⅰ型计算模型下,湖南电网特别严重覆冰重现期为24.8a。根据计算结果,绘制了湖南省多年一遇覆冰分布图,该图显示,湖南的覆冰严重区域集中在湘西南和湘东南地区。覆冰分布图为今后电网抗冰设计工作提供了指导。
분석전망복빙중현기,대우장악빙재규률종이지도항빙공작구유중요지도의의。위차,제출료기우겁치I형분포적전망복빙중현기계산방법,결합97개기상참1951-2008년적복빙일수관측수거,계산료97개기상참점15a일우、30a일우、50a일우화100a일우빙재적복빙일수,계산결과현시,장사마파령기상참100a일우적복빙일수위14.78d。안조특별엄중복빙중현기위11d이상적화분표준,재겁치Ⅰ형계산모형하,호남전망특별엄중복빙중현기위24.8a。근거계산결과,회제료호남성다년일우복빙분포도,해도현시,호남적복빙엄중구역집중재상서남화상동남지구。복빙분포도위금후전망항빙설계공작제공료지도。
It is very important to analyze icing recurrence interval of power grid for understanding ice disaster law and guiding ice-resistant.We put forward a calculation method of icing recurrence interval of power grid based on extreme-value type I,and calculated the icing days for recurrence period of 15 years,30 years,50 years and 100 years from 97 weather stations with the observation data of icing days from 1951 to 2008.The results show that the number of icing day for recurrence period of 100 years in Changsha Mapoling weather station is 14.78.If standard of serious icing of over 11 days is adopted,recurrence period of serious icing is 24.8 years in this model.Consequently,an icing distribution map of recurrence period of multi-years is plotted for design of anti-icing of power grid,showing that areas of serious icing are southwest and southeast of Hunan.