Metering method based on distributed electric energy, error detection method and error detection device

Abstract

The invention discloses a metering method based on distributed electric energy, an error detection method and an error detection device. The metering method comprises the steps of: sampling electric energy parameters in a system according to the pre-set sampling period, so that a sampling value is obtained; for the start time and the end time, performing interpolation calculation by respectively utilizing the sampling value, so that a theoretical sampling value is obtained; multiplying the active power corresponding to the sampling interval by the sampling interval to obtain the sampling electric energy, and multiplying the active power corresponding to the start time by the time from the start time to the first sampling time point to obtain electric energy at the start time; multiplying the active power corresponding to the end time by the time from the start time to the last sampling time point to obtain electric energy at the end time; and adding the sampling electric energy, the electric energy at the start time and the electric energy at the end time, so that the electric energy metering value in the electric energy metering time is obtained. By means of the metering method based on distributed electric energy, the error detection method and the error detection device in the invention, the distributed electric energy metering accuracy and reliability can be improved; and simultaneously, field check of an electricity meter can be realized.

Description

technical field [0001] The invention relates to the related technical field of electric energy metering and error detection, in particular to a metering method based on distributed electric energy, an error detection method and a device. Background technique [0002] With the deepening of the national smart grid strategy, especially for new digital substations with distributed structures, there is currently a problem of low accuracy of electric energy measurement. Refer to figure 1 As shown, the distributed structure is mainly composed of a voltage merging unit, a current merging unit, a switch, and a digital energy meter. Because the voltage merging unit and the current merging unit are distributed in different places, the existing standard devices cannot carry out voltage-current based The on-site detection work of the digital electric energy meter of the merging unit directly affects the accuracy and reliability of the electric energy metering system of the intelligent su...

AI Technical Summary

Problems solved by technology

[0002] With the deepening of the national smart grid strategy, especially for new digital substations with distributed structures, there is currently a problem of low accuracy of electric energy measurement. Refer to figure 1 As shown, the distributed structure is mainly composed of a voltage merging unit, a current merging unit, a switch, and a digital energy meter. Because the voltage merging unit and the current merging unit are distributed in different places, the existing standard devices cannot carry out voltage-current based The on-site detection work of the digital electric energy meter of the merging unit directly affects the accuracy and reliability of the electric energy metering system of the intelligent substation, so the inventor believes that it is very necessary to carry out the on-site detection work of the digital electric energy meter based on the merging unit to ensure that the intelligent substation Accuracy and Reliability of Electric Energy Metering System

[0003] In the process of implementing this application, the inventor found that there are at least the following defects in the prior art: the current electricity metering of distributed smart power stations has problems of low accuracy and inability to detect and verify on-site

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