Method for preventing intelligent electric meter from external electromagnetic field interference based on finite element simulation analysis

Abstract

The invention discloses a method for preventing an intelligent electric meter from external electromagnetic field interference based on finite element simulation analysis. The method includes the following steps that firstly, parameters of an electric meter simulation model are determined; secondly, electric meter simulation model output embodied when no external electromagnetic interference exists is calculated; thirdly, electric meter simulation model output embodied when power frequency magnetic field interference exists is calculated; fourthly, the influences of the change of the distance between an electromagnet and an electric energy meter on the electric meter simulation model output are analyzed; fifthly, the influences of a direct current magnetic field on a transformer power supply are analyzed; sixthly, the shielding effects of different permeability magnetic materials on an interference electromagnetic field are analyzed; seventhly, according to the function relationships acquired in the third step, the fourth step and the fifth step respectively and in combination with the shielding effects of the different permeability magnetic materials on the interference electromagnetic field acquired in the sixth step, the safe distances between a power supply inside the intelligent electric meter and a case of the intelligent electric meter, between a voltage transformer inside the intelligent electric meter and the case of the intelligent electric meter and between a current transformer inside the intelligent electric meter and the case of the intelligent electric meter are acquired. Three-dimensional electromagnetic field analysis is conducted based on finite element analysis, the influences of the external electromagnetic field on the electric energy meter are prevented, and the electric energy meter is protected against electricity stealing.

Description

technical field [0001] The present invention relates to computer-aided engineering analysis, more specifically, relates to a kind of simulating the influence of external disturbance electromagnetic field (power frequency magnetic field, direct current magnetic field) on voltage transformer, current transformer and transformer power supply inside smart meter in finite element software, On this basis, some anti-stealing measures for smart meters are obtained. Background technique [0002] Computer Aided Design (CAE) is widely used in engineering for aided design and analysis. CAE analysis, especially finite element analysis (FEA), is widely used in the analysis of structures, thermodynamics and electromagnetics. Finite element analysis analyzes and solves problems by seeking approximate solutions to partial differential equations. With the rapid development of computer technology, finite element analysis Get more and more applications. The finite element analysis of the elec...

AI Technical Summary

Problems solved by technology

In the existing technology, the smart meter generally judges whether it is in the state of stealing electricity through the detection of current, voltage, and intersection. When it is judged to be in the state of stealing electricity, it uses specific rules for measurement, and can only adopt specific metering rules when electricity stealing occurs. Metering, but it cannot prevent the electricity stealing behavior, that is, it cannot prevent the electric energy meter from entering the state of stealing electricity

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