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电网技术  2011 

采用最小累积风险度法的含风电场电力系统发电机组检修计划

, PP. 97-102

Keywords: 等风险度原则,革兰–沙利叶级数,机组检修计划,最小累积风险度法,半不变量,风电场

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Abstract:

以等风险度原则为基础,以各检修时段风险度方差最小为目标函数,建立了含风电场的电力系统发电机组检修计划模型,提出了基于最小累积风险度的启发式求解方法。采用半不变量描述负荷、发电机组出力等随机变量,将等效持续负荷曲线的卷积和反卷积运算转化为半不变量的加减。采用离散化的方法将风电机组等效成多状态机组,进而求取风电机组停运容量的半不变量。考虑风电场出力的不确定性,采用半不变量法结合革兰–沙利叶(Gram-Charlier)级数展开法求解系统的风险度。通过寻找检修区间内累积风险度最小的区间确定待检修机组的检修位置。IEEE-RTS系统的机组检修计划结果验证了该最小累积风险度法的有效性。

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