考虑风电辅助调频的弱鲁棒调度模型

Light robustness based dispatch model considered wind power's ancillary frequency

为解决传统鲁棒在处理风电不确定性上存在过度保守的问题,将弱鲁棒原理应用到含风电电力系统调度中。用区间鲁棒不确定集合描述风场功率预测误差的不确定性,并建立了风电参与辅助调频情况下的风场备用、传统机组备用等约束条件,提出了一种考虑风电辅助调频的弱鲁棒经济调度模型,通过调度传统机组和风电场以保证系统安全运行,同时满足了一定经济恶化容忍度;在含风电场的IEEE30节点算例中,对比分析了基准场模型、传统鲁棒模型和弱鲁棒调度模型三者的调度结果。算例结果表明:考虑辅助调频能够提高调度解的可行度,且与传统鲁棒模型相比,弱鲁棒具有更好的经济性。

In order to overcome the overly conservatism of the traditional robustness method in dealing with the uncertainty of wind power,a light robustness based dispatch model that can consider the uncertainty of wind power with the prediction error information given only was proposed,in which the ancillary frequency support from wind power was introduced and the constraints about the wind farm reserve limits and the conventional reserve limits were formulated. Finally,three methods including the nominal-scenario model,the conventional robust model and the proposed light robustness based model were systematically compared to validate the effectiveness of the proposed method,using a modified IEEE 30-bus system with wind power integrated. And the results show that the ancillary frequency regulation support can improve the feasibility of the scheduling scheme. Furthermore,the light robustness method is more economical than the traditional robust model.