Research On Optimization Collocation In Wind Farm

In recent years, the tempo about Wind power project is faster than the past time. a strong momentum, wind farms installed capacity has increased year by year, 2008, China added more than 5,130 wind turbine units, installed capacity of 6.246 million kilowatts, a growth rate of 89% of new installed capacity. New wind power installed capacity in 2009 reached 12 million kilowatts, ranking the world's first new volume is expected to wind power installed capacity in 2010 will also add volume about 10 million kilowatts. As of the end of 2009, China's total cumulative wind power will reach 16.13 million kwh, only the Inner Mongolia Wind Power capacity of more than 500 million kilowatts. In the process of building wind farms, wind farms in the layout of wind turbines is the first problem to be solved is the construction process is a crucial first step, the direct economic benefits related to the wind farm is good or bad. The spacing between the wind turbine, if too small, the direction of air flow along the upstream unit of the downstream units will have a greater impact of the wake, resulting in lower reduction of wind turbine generating capacity. Meanwhile, due to wake turbulence combined effects of wind turbines also cause damage and reduce life. Therefore, the need to wind energy distribution, unit characteristics, topography and wind factors such as land acquisition to optimize the layout of the wind farm, the maximum use of wind energy resources and land resources to achieve wind power generating capacity and efficiency is maximized.This paper combines theoretical analysis and experimental methods carried out in the dominant wind direction on the upper reaches of wind turbine on the downstream effects of wind turbine, while the wind turbine wind farm layout optimization methods were studied to determine the wind farm in how to layout the wind machine can effectively reduce the interaction between wind turbine made wind turbine wind farm in the methods of optimizing the layout of the preliminary research results, as follows:(1) Study the interaction between the two adjacent wind turbine, the set of boundary conditions on two adjacent wind turbine flow field between the modeling software through the use of CFD analysis of flow field obtained adjacent 3D-8D distance between the wind turbine flow field static pressure, velocity and vorticity distribution, so as to come between the wind turbine adjacent to the qualitative impact of the conclusions;(2) The use of the basic theorem of momentum of a single wind machine effect of the wake, the boundary conditions in case of reasonable assumptions on the mathematical description of the wake effect, and will simplify the formula derived to obtain the simplified calculation of wake effects formula, then analyzes the wake of the wind speed convergence of the calculation method of the region, and finally wind turbine model wind field experiments, compared with the actual wake calculation model values consistent with the extent to verify the CFD software the stereotypical conclusions.(3) Experimental results show, in the field of two wind turbine models used in wind direction and wind speed wind speed under stable conditions determined, it can be further verified by the CFD software, the qualitative conclusions drawn and the deduced mathematical relationship.(4) The conclusions in the practical application of the above carried out in wind turbine wind farm layout, calculation of wind power generating capacity, and compared with the current methods used to sum up the wind farm layout optimization methods. The results of this paper may wind turbine layout of the flat terrain to provide some guidance.