Influencing Characteristics Analysis of Large Area Icing and Galloping of Power Grid
This paper introduces the large area icing and galloping process of power grid in Hubei Province on January 28,2015.From field observation,a total of 59 500kV transmission lines of Hubei power grid have galloped,and the maximum wave amplitude of this line reaches 7 meters,and the galloping lasts for 51 hours duration,which is the severest event in recent years.The galloping process has a serious impact on the Hubei power grid,resulting in more than 5 transmission lines of 500kV outage,22 transmission lines of 500kV tripped,equipment of 11 transmission lines been damaged.This paper analyzes the general influencing characteristics of large area icing and galloping of power grid.The circulation situation of large area icing and galloping process of power grid is summarized.The large area of icing and galloping process in Hubei power grid is due to the interaction of the cold air coming down from the northern and the warm and humid southwest air flowing in the Yangtze River Basin and interacting with each other.Meanwhile,the characteristics of meteorological elements during the icing and galloping process are analyzed respectively.Through the statistics data,it can be found that the large area galloping is easy to occur when the temperature is in the period between-3 degrees Celsius to zero degrees Celsius,the humidity is in between 70%to 99%,the wind velocity is between 6m/s to 11m/s,the wind direction is among the northwest wind,the north wind and the northeast wind,and the ice thickness is between 2mm to zero 8mm.At last,it puts forward the typical topography,open areas of the plain and hilly area with open barriers at both sides,which is easy to induce large area icing and galloping event.Based on the analysis above on characteristic for large area icing and galloping,this paper provides a theoretical basis for the prediction of large area icing and galloping.
large area icing and galloping characteristics analysis circulation situation characteristics of meteorological elements typical topography
LI Yang LU Jiazheng XU Xunjian GUO Jun FENG Tao LI Li
State Key Laboratory of Disaster Prevention and Reducation for Power Grid Transmission and Distribution Equipment(State Grid Hunan Electric Company Disaster Prevention and Reduction Center)
国际会议
重庆
英文
1-5
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）