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电网技术  2014 

电力调度SCADA系统中历史数据压缩及存储策略

DOI: 10.13335/j.1000-3673.pst.2014.04.044, PP. 1109-1114

Keywords: 历史数据压缩,旋转门,数据存储,ERSDT算法,平衡旋转,关键数据点,分级存储

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Abstract:

为降低电力调度SCADA系统历史数据量、提高历史数据存储效率,提出一种基于有效估算的旋转门算法(effectivereckonswingdoortrending,ERSDT),并针对压缩的历史数据给出了一种新的数据多级存储策略。ERSDT通过搜寻最远压缩点以及旋转平衡因子方式进行数据压缩。针对压缩数据给出实时数据库、历史数据库、磁盘文件库三级存储体系,并描述了三级存储体系的运行原理。实验数据验证了ERSDT算法的可行性,与传统的SDT算法相比提高了压缩率、降低了压缩时间。实践证明ERSDT算法以及多级数据存储策略可以降低历史数据量、提高数据存储及查询效率,从而保证SCADA系统安全、稳定的运行。

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