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电网技术  2013 

基于气象信息因素修正的灰色短期负荷预测模型

, PP. 720-725

Keywords: 短期负荷预测,灰色模型,气象因素修正,邻近趋势外推,相似日替换

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Abstract:

针对传统灰色模型应用于短期负荷预测的缺陷,改进了多角度数据组织策略,选择社会活动背景相似度较高的历史日作为相似日,建立了气象因素突变判别准则,以识别相似日中的气象突变,并采用回归法消除相似日负荷数据中的受气象敏感负荷分量。采用邻近趋势外推法和相似日替换法矫正灰色模型预测时容易产生的局部畸变点。实验结果表明,改进后的灰色模型预测精度提升明显,预测精度平均提高1%~2%,最高可达7%。该方法能同时考虑社会活动规律和气象因素对负荷的影响,克服了传统模型本身对不规律数据预测精度差的缺点。

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