考虑动态增容效应的陆上风电场送出线路截面优化方法

现有风电场架空导线截面优化设计通常以典型环境参数为依据,未考虑风速等气象条件的动态变化,仍有进一步挖掘输电能力潜力的空间。为了进一步优化导线截面,文中基于Morgan公式,建立数学模型表征陆上风电场架空送出线路导线截面优化设计过程,提出一种适用于送出线路导线截面设计的优化方法。该方法综合考虑线路动态增容效应和风电场出力特性的匹配,根据地区历史气象数据等信息,选择送出线路导线截面,完成优化设计。通过算例分析验证了文中所提出的陆上风电场送出线路导线优化设计方法。结果表明,所提出的方法能够在满足风电送出需求的基础上有效降低导线截面积,节省导线材料,提高陆上风电场电气设计的经济性。

Cross-section optimization method of overhead transmission lines for onshore wind farms considering dynamic ampacity increasing

Currently, the cross-section optimal design of overhead transmission lines for wind farms is on the basis of typical environmental parameters, which neglects the dynamic changes of weather conditions (like wind speed) and still has potentials to dig out transmission capability. In order to furtherly optimize the cross-section, this paper establishes mathematical model to characterize the optimal cross-section design process of overhead transmission lines for onshore wind farms and proposes an method which can be applied to optimize the cross-section design of overhead transmission lines. In which, the cross-section of transmission lines is designed and selected optimally considering the match between dynamic ampacity increasing of overhead transmission lines and wind turbine output characteristics on the basis of reginal historical meteorological data. Finally, the proposed method is verified by case study. Results indicates that the proposed method efficiently decreases the cross-section of transmission line, saves wire material and improves economic performance of electrical design for land wind farms.