风电并网价值分析

Value Analysis of Wind Power Integration

风电的接入因能替代常规机组发电而具有正向价值,同时也因会改变系统中不同类型机组的运行方式而带来负向价值。为衡量风电并网价值,建立了含风电机组日前优化调度模型,模型中考虑了不同机组的特性及负荷与风电的随机性和误差,从风电渗透率、负荷与风电预测误差和负荷与风电相关性3方面分析了它们对风电价值的影响。结果表明:风电并网容量较小时,风电具备减小系统运行成本的价值;风电并网容量较大时,机组启停费用增加,致使风电不具备并网的价值。

The access of wind power can replace the power generation of conventional units and thus has a positive value,and it will also change the operation mode of different types of units in the system and bring negative value.In order to analyze the value of wind power integration,a pre-optimized scheduling model for wind turbines was established.The characteristics of different units,the randomness and error of load and wind power were considered in the model.The influences of wind power penetration rate,load and wind power prediction error and load and wind power correlation on wind power value were analyzed.The results show that wind power has the value of reducing the operating cost of the system when the wind power penetration rate is low.When the wind power penetration rate is high,the wind power does not have the value of grid connection due to the increase of the unit's start-stop cost.