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电网技术  2014 

考虑风电场相关性的含风电电力系统随机潮流分析

DOI: 10.13335/j.1000-3673.pst.2014.08.022, PP. 2161-2167

Keywords: 风速相关性,随机潮流,半不变量,无功补偿

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Abstract:

地理位置接近的不同风电场的风速具有较强的相关性,这将会影响含风电电力系统随机潮流分析评估的结果。首先根据多风电场的风速历史数据建立了考虑不同风电场相关性的风速离散化联合概率模型,在此基础上结合半不变量和级数展开方法,提出考虑风电场相关性的含风电电力系统随机潮流分析评估模型,得到各节点电压的分布和越限概率等指标,同时该模型也可以考虑风电场有功无功出力的相关性。对某实际电力系统的算例验证结果表明,所提算法较不考虑风电场相关性的随机潮流结果的精度提高了很多;与蒙特卡洛方法计算结果相比误差较小,而计算速度大大提高。该算法可以快速有效地得到含风电电力系统的随机潮流评估指标,并针对所得结果提出相应的无功补偿方案,具有较好的工程应用价值。

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