Whole-network-domain electronic transformer high-frequency measurement data discrimination and data processing method
An electronic transformer and metering data technology, which is applied in the direction of electrical digital data processing, special data processing applications, database models, etc., can solve the problems of high difficulty and high storage cost, achieve speed improvement, improve screening efficiency, and improve data quality. The effect of storage and access efficiency
Inactive Publication Date: 2019-06-07
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +4
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The sampling frequency of the electronic transformer is as high as 4kHz, and each combined unit generates about 86GB of data per day. According to the calculation of 20 intervals in a typical 220kV smart substation, about 1.7TB of data per day, about 620TB of data per year, based on the actual situation of existing smart substations As far as the situation is concerned, it is costly and difficult to collect and store these data. Therefore, an effective data screening and data processing method is needed to pre-process the big data of electronic transformers in the whole network to improve the efficiency of data analysis. At the same time reduce the operation and maintenance cost of the system
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[0043] Combine below figure 1 , figure 2 with image 3 The present invention will be further described. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0044] (1) High-frequency measurement data screening algorithm
[0045] The following is an introduction to the high-frequency measurement data screening algorithm. This algorithm uses the Laida criterion (3σ criterion) and the cluster analysis method for data screening. First, the Raida criterion (3σ criterion) is used to screen and eliminate abnormal data.
[0046] A series of measurement data obtained under the same conditions x 1 ,x 2 .....x n , Whose arithmetic mean is
[0047]
[0048] Among them, n is the number of data;
[0049] Calculate the experimental standard deviation s according to Bessel's formula:
[0050]
[0051] If a suspicious value x d When the absolute value of the di...
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The invention discloses a whole-network-domain electronic transformer high-frequency measurement data discrimination and data processing method. It carries out the high-frequency measurement data discrimination in a mode of combining a Leida criterion and a clustering analysis method, and carries out the screening and removing of abnormal data; based on the high-frequency measurement data, it adopts a Spark offline parallel computing mode to discriminate the high-frequency measurement data; and stores the discriminated data by adopting an HDFS-based distributed operation data storage mode. According to the method, by adopting an efficient data discrimination algorithm, useless data in the high-frequency measurement data is effectively screened out, and a good data basis is provided for further data analysis; a Spark parallel computing technology is adopted, so that the speed is greatly improved, and the discrimination efficiency of the high-frequency measurement data is effectively improved; and the screened high-frequency measurement data is stored by adopting HDFS-based distributed operation data, so that the data storage and access efficiency is improved.
Description
Technical field [0001] The invention relates to a method for screening and data processing high-frequency measurement data of a full-network electronic transformer, and belongs to the technical field of intelligent application of electronic current transformers. Background technique [0002] In 2010, in order to speed up the construction of smart grids, the State Grid Corporation of China launched the "Four Guarantees and One Striving" project for smart substations. For the first time in China, all smart substations such as 220kV substation in Jiangsu Xijing, 110kV substation in Sichuan Yongchang, and 750kV substation in Yan'an were adopted. Electronic transformer. In 2016, State Grid Corporation plans to build and put into operation 500 new generation smart substations within 3 years. The construction of smart substations will be further accelerated, and electronic transformers will gradually enter the stage of large-scale application. The sampling frequency of electronic trans...
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Login to View More IPC IPC(8): G06F16/28G06F16/22G06F16/182
Inventor 寇英刚范洁陈刚杨世海李志新卢树峰徐敏锐陈文广陈飞陆子刚吴桥黄道程含渺陈晶李志立
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST