格式网与链状网汇集风电功率能力的比较

集中式风电场的风机台数多，风电功率大，为了提高风电场集电网的可靠性，提出采用10 kV或35 kV格式网建设风电场的集电网。建立格式网模式风电场集电网的拓扑结构、停运率评估模型，提出格式网和链状集电网的停运率指标，利用MATLAB/Simulink搭建格式网和链状集电网的停运率仿真模型，比较2种集电网电缆故障切除前后汇集母线的电压电流水平以及2种电网汇集风电功率的能力，对比实例中格式网和链状集电网的电缆投资和电量收益。结果表明：链状网等效电量不足期望值是格式网等效电量不足期望值的4.6倍，格式网集电网比链状集电网的总体收益高61.2万元，格式网汇集的风电功率大，有利于风电功率的送出，投资前景良好。

Comparation on Wind Power Collection Capacity of Meshed and Radial Grids

For great number of wind turbines and large wind power of centralized wind farms,10 kV or 35 kV meshed grids were proposed to build power collection grids of wind farms,in order to improve the reliability of power collection grids.The topology of meshed power collection grid and its outage rate evaluation model were established,and the outage rate evaluation index of both meshed and radial power collection grids were calculated.The outage simulation models of the two power collection grids were built on MATLAB /Simulink software platform,and the current level and voltage level of collecting bus before and after the fault being cut off in the two grids were analyzed,and the power collection capacity of meshed power collection grid for wind farm was studied,and the cable investment and power income of the two grids were compared.The results show that the equivalent expected energy not supplied（EENS）of radial power collection grid is 4.6 times as much as that of meshed power collection grid,and the total income of meshed power collection grid is 0.612 million RMB more than that of radial power collection grid,and meshed power collection grid is better at collecting wind farm power and smoothly sending out wind farm power than radial power collection grid,and meshed power collection grid has good investment prospects.