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电力大数据:2019,22(9):-
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用电信息采集系统中分布式光伏发电量缺失值修复方法的研究
王立斌1, 张思为2, 张晶1, 李翀3, 高建为2
(1.国网河北省电力有限公司;2.国网河北省电力有限公司沧州供电分公司;3.国网河北省电力有限公司电力科学研究院)
Research on the method for repairing the missing value of distributed photovoltaic power generation in electricity information acquisition system
Wang Libin1, Zhang Siwei2, Zhang Jing1, Li Chong3, Gao Jianwei2
(1.State Grid Hebei Electric Power CoLtd;2.State Grid Hebei Electric Power CoLtd Cangzhou Power Supply Branch;3.State Grid Hebei Electric Power Research Institute)
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投稿时间:2019-04-03    修订日期:2019-05-24
中文摘要: 受采集设备故障、通信信道不稳定以及外界干扰等诸多因素的影响,用电信息采集系统在采集分布式光伏的发电量时会发生失败,造成用电信息采集系统中分布式光伏的发电量存在缺失值,进而影响基于分布式光伏发电量所开展的各类分析,如分布式光伏发电量预测、分布式光伏所在台区的线损分析等。为解决上述问题,本文提出了“同一地理区域内分布式光伏的发电量曲线具有很强的相关性”这一推论,并通过计算某地理区域的周发电量曲线相关系数矩阵验证了该推论的正确性。基于该推论,本文提出了周发电量趋势曲线的概念,以表征某一地理区域内分布式光伏发电量曲线的波动规律。基于周发电量趋势曲线提出了一种用电信息采集系统中分布式光伏发电量缺失值的修复方法,通过算例分析验证了该方法有效可行。
Abstract:Influenced by many factors, such as faults of acquisition equipment, unstable communication channel and external interference, electricity information acquisition system would fail in collecting distributed photovoltaic power generation, which will result in the missing value of distributed photovoltaic power generation. So the analysis based on distributed photovoltaic power generation will be affected, such as distributed photovoltaic power generation forecasting, line loss analysis in the area where distributed photovoltaic is located, etc. To solve the above problem, the inference that the distribution photovoltaic generation curve in the same geographical area has a strong correlation is presented. And the validity of the inference is verified by calculating the correlation coefficient matrix of the weekly power generation curve in a geographical area. Based on this inference, the concept of trend curve of weekly power generation is presented, which can characterize the fluctuation law of distributed photovoltaic power generation curve in a geographic area. Based on the trend curve of weekly power generation, the method for repairing the missing value of distributed photovoltaic power generation in electricity information acquisition system is presented. The validity of the method is demonstrated by calculation examples.
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