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计及相关性的含风电场电力系统概率可用输电能力快速计算

DOI: 10.13334/j.0258-8013.pcsee.2014.07.003, PP. 1024-1032

Keywords: 风电场,可用输电能力,拉丁超立方采样,相关性,最优潮流灵敏度,快速计算

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Abstract:

风电并网对于电力系统运行中的可用输电能力(availabletransfercapability,ATC)计算提出了新的要求。如何全面地考虑多种不确定性因素所具有的波动特性及其在地域上的相关性特点,进而准确地评估ATC,并提高计算速度成为亟待解决的问题。为此,提出了一种快速计算含风电场电力系统概率ATC的新方法。该方法采用拉丁超立方采样提高了蒙特卡罗仿真的采样效率,利用Cholesky分解对输入随机变量进行相关性建模。对于所得到的样本场景,基于聚类思想和现代内点法提出了快速计算大量场景下ATC的最优潮流灵敏度方法。通过IEEE-RTS79测试系统验证了所提方法可在确保计算精度的同时提升计算效率,算例结果表明,风速强相关将加大ATC的波动性,需要在分析计算中予以考虑。

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