Time-periodic model of wind speed and its application in risk evaluation of wind-power-integrated power systems

Jian Wang, Xiaofu Xiong, Haoran Li, Xiaofeng Lu
2019 IET Generation, Transmission & Distribution  
Risk evaluation of wind-power-integrated power systems requires a distinctive wind speed modelling technique. Existing techniques of mid-and long-term risk assessment mainly focus on annual wind speed pattern rather than its monthly and daily patterns, which cannot reflect the time-varying characteristics of power system risk. This article proposes a timeperiodic model of wind speed which incorporates two parts. The first part is the monthly wind speed patterns which can be represented as
more » ... eriodic functions, while the other one is the fluctuation in daily wind speeds that can be denoted as a random variable following a certain probability distribution. With this model, a risk evaluation procedure for wind-powerintegrated power system is developed. Collected wind speed data from four representative sites in China are used to verify the proposed model. The application of the proposed wind model and risk assessment method is tested by calculating annual and monthly risk indices of a modified IEEE-RTS79 system. Results can provide references for power system planning, mid-and long-term dispatching, and monthly generation scheduling.
doi:10.1049/iet-gtd.2018.5619 fatcat:eftxtlgalzce5h3lawuu6rsljq