Information fusion method suitable for transformer state evaluation under multi-dimensional information
A multi-dimensional information and state evaluation technology, which is applied in the directions of instruments, data processing applications, character and pattern recognition, etc., can solve the problems of fuzzy transformer state evaluation, etc., and achieve the effect of good applicability and high accuracy
Inactive Publication Date: 2018-09-11
STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH +2
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[0007] The purpose of the present invention is to improve the accuracy of information fusion, solve the problem of fusion of a large number of fuzzy and conflicting information in transformer state evaluation, and improve the accuracy of transformer state evaluation in order to improve the accuracy of transformer state parameter information fusion process in the current multi-dimensional information environment. The operation and maintenance department of the power grid company arranges the maintenance plan to provide support
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[0063] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to more clearly illustrate the technical scheme of the present invention, but cannot limit the protection scope of the present invention with this.
[0064] An information fusion method suitable for transformer state evaluation under multi-dimensional information is characterized in that it includes: calculating the relative importance and weight of multi-dimensional information, and then using the weighted average method to fuse the state membership of multi-dimensional information, and finally get State of the transformer after fusion.
[0065] Specifically, it includes the following five steps.
[0066] Step SS1: Digitize the running state D of the transformer; the step SS1 specifically includes:
[0067] Assuming that Θ is a non-empty finite set, the mapping relationship of D numbers is as follows:
[0068] D: Θ→[0,1], where ...
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The invention discloses an information fusion method suitable for transformer state evaluation under multi-dimensional information. The method includes calculating the relative importance degree and the weight of the multi-dimensional information, fusing the state membership degree of the multi-dimensional information through a weighted average method, and finally obtaining the state of the fusedtransformer. The invention aims at solving the problem that when different state parameter information has trouble or conflict, the influence on the fusion result is small, and based on the existing DS evidence theory, when the information conflict occurs, the result can be wrong, and the weights of different information can be fully considered. By adopting a weighted summation method, the error of information fusion under the conflict condition is reduced; the weights of the parameters of different states are fully considered, and the importance of the parameters of different states is distinguished, and the accuracy of the fusion result is higher than that of the DS evidence theory without considering the information weight; and different state grades are required to be completely mutually exclusive in the DS evidence definition. According to the method, different state grades are not required to be mutually exclusive.
Description
technical field [0001] The invention relates to an information fusion method suitable for transformer state evaluation under multi-dimensional information, and belongs to the technical field of electric power operation and maintenance. Background technique [0002] Transformer is one of the most valuable equipment of power grid company, whether its stable operation is related to the power supply reliability of the entire power grid, so it is of great significance to carry out the evaluation of transformer operation status and effectively control the operation status of transformer, among which the status evaluation results Accuracy is the key to the whole work. [0003] With the construction of smart substations, more and more online devices are used for transformer status detection. Different online devices reflect the health status of equipment from different angles. The increase of online devices can improve the operation and maintenance personnel's control over the opera...
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IPC IPC(8): G06Q10/00G06Q50/06G06K9/62
CPCG06Q10/20G06Q50/06G06F18/25
Inventor 王骏黄宇峰陆振威陈斌郑重周圆王琪
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH