A Dynamic Attenuation Method for Integral Restoration of Electronic Transformer Acquisition Unit

Abstract

The invention discloses a dynamic attenuation electronic transformer acquisition unit integral reduction method, which comprises the following steps: firstly, obtaining an input sampling value at thecurrent moment, iteratively calculating sampling value integral data through a discrete definite integral algorithm, and then judging whether the calculated integral value needs to be attenuated or not in combination with sampling information cached in a preorder; if it is recognized that the current input is normal sampling, attenuating the previous integral value; and if the current input is identified as the fault sampling, not attenuating the previous integral value; finally, filtering the periodic null drift of the output data to obtain originally sampled integral data. According to the invention, the precision and stability of integral transmission characteristics of sampling values output by the acquisition unit are effectively ensured; meanwhile, a later-period performance optimization space is provided, the reliability and flexibility of the integration method are considered, integration is attenuated through repeated iteration, the influence of sampling direct-current offsetand sampling abnormity on the integration algorithm is reduced, and the convergence of an integration system and the steady-state transmission precision of an acquisition unit are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of digital substations of electric power systems, and in particular relates to an integral restoration method of an electronic transformer acquisition unit with dynamic attenuation. Background technique [0002] The electronic transformer has the characteristics of small size, light weight, no magnetic saturation, no secondary open circuit, and can be easily installed in combination with primary high-voltage switchgear. Market application prospects. In a broad sense, the electronic transformer is composed of three parts: the sensing coil, the local acquisition unit and the sampling merging unit. After the current and voltage signals of the primary system are transmitted through the transformer body, they are converted into secondary small analog signals, and then collected by the local acquisition unit and converted into digital sampling signals, and finally output to the merging unit through the optical fi...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to provide a dynamic attenuation electronic transformer acquisition unit integral restoration method, to solve the deficiency of the sampling integration technology of the electronic transformer acquisition unit in the current digital substation, and to solve the problem that the software integration is susceptible to sampling zero drift Or sampling abnormal interference, and the transient transmission characteristics of the fault current attenuation DC component in the primary system cannot be satisfied, etc.

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