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电网技术  2015 

用于能量调度的风-储混合系统运行策略及容量优化

DOI: 10.13335/j.1000-3673.pst.2015.08.007, PP. 2107-2114

Keywords: 风功率波动,混合储能系统,不平衡功率,经验模态分解,投资成本

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Abstract:

随着风力发电渗透率的日益提高,风电波动给电网带来了大量的负面影响。采用超级电容-蓄电池混合储能系统平衡风功率和风电场计划出力之间的偏差。首先,采用经验模态分解技术(empiricalmodedecomposition,EMD)将电网中的计划出力与原始风功率之间的不平衡功率(unbalancedpower,UP)分解成若干固有模态函数(intrinsicmodefunctions,IMFs)。其次,以各固有模态函数之间能量混叠最少为原则确定“划分频率”,将不平衡功率分解成为高频分量和低频分量,并分别采用超级电容和蓄电池对其进行平抑。最后,以风电场实际出力数据为基础,设计了同时考虑投资成本与调度效果的混合储能系统(hybridstoragesystem,HSS),计算结果验证了所提方法的有效性。

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