At present,only the influence of wind speed is considered in the calculation of the transmission capacity of wind farms,and the influence of ambient temperature is not considered.In the analysis of the ultimate current carrying capacity of overhead conductors,the special working environment of wind power is not considered,resulting in the waste of wind farm line transmission resources.Therefore,this paper proposes a method to increase the capacity of wind farms considering the influence of ambient temperature and wind speed to maximize the development and utilization of wind power resources.Firstly,the influence of ambient temperature is added on the basis of the traditional turbine output model,and the turbine output model is improved.Then,through the overhead conductor thermal balance equation,the ultimate current-carrying model of the conductor considering the combined influence of ambient temperature and wind speed is established.Finally,by drawing the distribution of the total output surface of the wind turbine and the ultimate current-carrying surface of the conductor in the coordinate system of ambient temperature and wind speed,the output of the wind turbine is matched with the limiting current-carrying characteristics of the conductor to obtain the maximum allowable output capacity of the wind farm.The simulation results show that the wind power transmission line with the same conductor cross-section has a certain transmission power margin,and the paper method can determine the ultimate transmission capacity of the wind farm and improve the economic benefits of the wind farm,which is of great significance for guiding the capacity increase of the wind farm.
关键词
风电场/架空导线载流特性/风机出力特性/极限增容
Key words
wind farms/current-carrying characteristics of overhead conductors/turbine output characteristics/limit capacity increase
维普
万方数据