考虑风电备用可靠性的电力系统备用优化

Reserve Optimization for Power System Considering Reliability of Wind Power Reserve

风电能够以降载运行的方式提供备用。由于风电实际出力的不确定性,风电提供的备用也可能偏离预定值,风电备用并不完全可靠。为此提出一种考虑风电备用可靠性的电力系统备用优化模型。首先,基于风电出力的概率分布信息,分析风电提供备用的变化;然后,将风电备用纳入弃风、失负荷成本的计算中,并通过进一步的消除积分符号以及线性化处理,将模型转化为混合整数线性规划问题求解;最后,基于IEEE-RTS 24节点算例验证了所提模型的有效性。算例结果表明,考虑风电备用的可靠性可以对系统中的弃风、失负荷成本进行更精细的评估,从而对系统中的备用进行更精细的配置,避免过于保守或激进的结果。

Wind power can provide the reserve by de-loading operation.Due to the uncertainty of the actual output of wind power,the reserve provided by wind power may deviate from the predetermined value,so the wind power reserve is not completely reliable.Therefore,a reserve optimization model for power systems considering the reliability of wind power reserve is proposed.Firstly,based on the probability distribution information of wind power output,the variation of wind power reserve is analyzed.Then,the wind power reserve is included in the calculation of curtailed wind costs and load loss costs.The proposed model is transformed into a mixed-integer linear programming problem by further eliminating the integral sign and linearization.Finally,the effectiveness of the proposed model is illustrated based on the IEEE-RTS 24-bus system case.The results show that considering the reliability of wind power reserve,the curtailed wind costs and load loss costs in the system can be evaluated more precisely,so that the reserve in the system can be configured more precisely,which can avoid overly conservative or radical results.