Processing method and device for bad lever data of power system and storage medium

Abstract

The invention relates to an electric power system lever bad data processing method and device and a storage medium, and belongs to the technical field of electric power system data processing. The method comprises the following steps: calculating an approximation ratio of a measurement error component of a power system; obtaining a correction weight measured by the power system according to the approximation ratio; establishing a lever bad data identification model according to the correction weight; obtaining a measured estimation error according to the lever bad data identification model; and obtaining a correction value of the bad data according to the estimation error. According to the method, the correction weight is obtained through the approximation ratio obtained through calculation, the lever bad data identification model is established through the correction weight, the measured estimation error is obtained through the lever bad data identification model, the correction value of the bad data is obtained through the estimation error, and therefore the bad data are corrected. And the accuracy of processing the bad lever data of the power system is improved.

Description

technical field [0001] The present invention mainly relates to the technical field of power system data processing, and in particular relates to a processing method, device and storage medium for power system leverage bad data. Background technique [0002] The larger the scale of the power system, the more measuring instruments it covers, and the accuracy of the instruments varies greatly, which makes the errors of different measurements different. In addition, the topological correlation between the measurements shows obvious leverage characteristics between bad data. Multi-correlation and consistency. How to accurately determine the weights of measurements of different qualities and overcome the mutual influence between measurement errors is a key problem to be solved in state estimation. [0003] For leverage measurement, researchers have given its definition from both qualitative and quantitative perspectives. The qualitative definition of leverage measurement is to u...

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Problems solved by technology

The qualitative definition of leverage measurement is to use the injection measurement with a large number of adjacent branches and the transmission measurement with larger branch parameters compared with other branches as a lever measurement, but the exact adjacent branch is not given. The degree to which the number is large and the difference in branch parameters is large can be regarded as reaching the standard of leverage measurement, so it can only be roughly judged whether it belongs to suspicious leverage measurement; and the quantitative definition is the Mahanobis measured by calculation. If the Mahalanobis distance is greater than a certain threshold, the measurement is considered as a lever measurement. Although the quantitative method can accurately identify the lever measurement, the error contained in the leverage measurement has not yet been very effectively identified. method

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