午夜欧美大片免费观看,欧美激情综合五月色丁香,亚洲日本在线视频观看,午夜精品福利在线

The variation characteristics of daily electrical loads from 2000 to 2006 in Hebei are analyzed. Taking Shijiazhuang as an example, a series of correlative indexes between peak loads and meteorological elements are presented, such as maximum, minimum and average temperatures, as well as average relative humidity, precipitation,etc. The results show that the meteorological elements affecting directly electric loads vary with time. An analysis is made of the variation of the electric loads when temperature rise 1 ℃ from June to September and in November,and the variation of the electric loads when precipitation is above 10 mm/d from March to August. The weatherbased electric load forecast equation is set up according to meteorological conditions.