wind scale
1.The current research on the steady-state operation of grid-connected wind farms is introduced, including the power flow calculation models for power systems which contain wind farms, the analytic methods and models for the static voltage stability of wind farms, the voltage static stability indices and measures to control the voltage stability, the factors influencing the maximum power injection of wind farms and main relevant analytic methods, indices for wind farm scale, and the capacity credit.
6.For the baroclinic system in the upper troposphere between 250 mb and 750 mb, the temperature field is adjusted towards wind field when the scale of the system is smaller than a critical scale L_0, and the reversed is true when the scale of the system is larger than L_0. This is demonstrated by calculated examples in which two horizontal scale are used.
9.In this paper,research methods such as numerical simulation,moving model test, wind tunnel test,full-scale train test and theoretical analysis and so on have been adopted. And the influence of streamlined head shape on air pressure pulse from two trains passing by each other,aerodynamic drag and lift was deeply studied,and a series of theory functions obtained.
