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电网技术  2015 

大规模风电并网的电力系统运行灵活性评估

DOI: 10.13335/j.1000-3673.pst.2015.06.032, PP. 1672-1678

Keywords: 电力系统灵活性,蒙特卡洛仿真,不确定性,大规模风电,备用容量,爬坡率

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Abstract:

电力系统具有足够的灵活性对于接纳风电等可再生能源至关重要。为实现包含高比例可再生能源的未来清洁电力系统,亟需建立一套充分考虑风电波动性和随机性的电力系统运行灵活性定量评价指标体系。基于电力系统灵活性的定义和原理,提出了一套考虑大规模风电接入的电力系统灵活性定量评估指标体系,并基于蒙特卡洛模拟法和经济调度模型,提出了实用化的指标计算方法。该模型能够考虑风电及负荷的不确定性,并计入了风功率预测误差的时间相关性,从而反映了负荷不确定性和风功率预测不确定性对灵活性指标的不同影响原理。采用我国西北某电网实际风电场数据对所提算法进行了仿真分析,证明了风电不确定性和负荷不确定性对灵活性的影响存在本质区别,并定量研究了不同因素对灵活性指标的影响。

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