Research on the Spatio-temporal Characteristics of High-impact Weather for Wind Power System

Pei Shunqiang; Li Muyuan; Shen Yanbo; Wang Chuanhui; Ding Chenchen; Zhang Xiaomei

doi:10.16765/j.cnki.1673-7148.2024.06.007

Abstract：Taking the wind power system as an example,this article defines and identifies the high-impact weather related to basic meteorological elements such as wind speed and temperature based on ex-isting standards and research.The spatio-temporal characteristics of high-impact weather reflected by me-teorological observations over the last 30 years are summarized.The results indicate that high-impact weather has evident regional characteristics in China:Xinjiang and the Sichuan Basin have more light winds,but the Three North region,western Sichuan and Chongqing,and coastal areas have more strong winds.The extreme high winds that impact the safety of electrical equipment are most seen in plateaus and mountains in western China as well as in the coastal areas in eastern China.Meteorological stations with frequent high temperatures in summer are primarily located in eastern Xinjiang,eastern Sichuan and Chongqing,central parts of East China,whereas in winter the meteorological stations experiencing fre-quent low temperatures and high risks of wire icing are in Northeast China,western Inner Mongolia and northern Xinjiang.In addition,there are differences in the inter-decadal variation of these high-impact weather events.The number of strong wind days and light wind days in most parts of China,as well as the number of low-temperature days and wire icing days in Northeast China,western Inner Mongolia and Xinjiang,have remained a low level in the past 10 years,which is beneficial to wind power output and power system safety.However,the number of extremely high temperature days in most regions of China has been in an increasing trend in the past 30 years,which may pose more threats to the stable operation of power equipment and energy supply in summer across China.