Method for collecting electric energy errors of electric energy meter and device thereof

Abstract

The invention relates to the field of electric energy metering, and discloses a method for collecting electric energy errors of an electric energy meter and a device thereof. In the invention, in a reactive load environment, the electric energy meter is collected by using high-accuracy and universal power values; and compared with the traditional pulse correction method, the correction requirements are reduced, the calibration process is simplified, the advantages of quickness, accuracy and convenience are highlighted, and an effect of carrying out single-point correction on the errors of the electric energy meter is achieved. If a phase angle is too big or too small, a situation that the value of a sine or cosine thereof is too big or too small is caused, therefore, the calculation accuracy can not be ensured. Through taking power values as data sources rather than direct and low-accuracy angles or derived parameters (such as power factors and the like) as data sources, a situation that the principle error of correction is low enough can be ensured. Through verification, the accuracy of correction on the electric energy meter can be further ensured. The testing time is only one third of the original testing time, thereby greatly saving the total collection time.

Description

technical field [0001] The invention relates to the field of electric energy measurement, in particular to a technology for correcting electric energy errors of electric energy meters. Background technique [0002] In recent years, with the country's strong support for smart grids, the market demand for electronic energy meters has also continued to expand. The basic unit of electric energy measurement must be included in it, and in the high-volume, low-cost electric energy meter production industry, cost is the key factor, and the calibration cost is mainly reflected in the calibration time. If reasonable technical improvement methods can be used to Reducing the total time of calibration will inevitably optimize the cost of calibration and improve the market competitiveness of products. [0003] Electric energy meters are assembled from multiple discrete components, and there must be a certain degree of discreteness, which will also cause errors. Therefore, a meter calibra...

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Problems solved by technology

[0004] The traditional two-point calibration mentioned above needs to be driven by the standard source twice, and these parts need to rise time. If it is a three-phase situation, the standard source will be driven as many as six times. The test steps are cumbersome and the calibration time is longer.

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