Anti-electric stealing measuring method for electric energy meter

Abstract

The invention provides an anti-electric stealing measuring method for an electric energy meter. The method comprises the following steps: S1, starting running of the electric energy meter; S2, determining whether a preset electric stealing condition that the magnetic field strength of the electric energy meter is greater than 150m'T is satisfied, proceeding with S3 if so, otherwise returning to the S1; S3, determining whether a preset selection compensation mode is automatically started, proceeding with S4 if so, otherwise proceeding with S6; S4, using a compensation measurement formula P=U*Imax to calculate a pulse output quantity, recording voltage and current parameters, and proceeding with S5; S5, exiting the compensation mode, using a normal measurement formula P=U*I to calculate thepulse output, and proceeding with S7; S6, recording a start time T3 and an end time T4 of the time period that meets the preset electric stealing condition, and recording a current instantaneous maximum value Imax and a voltage value U within T3 and T4; and S7, ending. By providing a compensation mode, the anti-electric stealing measuring method for an electric energy meter can automatically calculate the power loss of the electric energy meter during the electric stealing time period, or record various parameters of the electric energy meter during the electric stealing time period, so as tofacilitate subsequent recovery.

Description

technical field [0001] The invention relates to the technical field of electric energy meters, in particular to a metering method for electric energy meters to prevent electricity theft. Background technique [0002] With the improvement of electric energy meter technology, power bureaus and users have higher and higher requirements for the quality and reliability of electric energy meters, but there are still some users who use certain technical means to interfere with electric energy meters, for example, on electric energy meters Magnets are installed to generate a strong magnetic field, which affects the normal measurement of the electric energy meter and steals electricity, so as to achieve the purpose of paying less electricity bills for individuals, which makes the power bureau face great losses. Such as figure 1 As shown, most of the current energy meters use the combination of manganese copper and current transformers for sampling and measurement. Under external int...

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Problems solved by technology

[0002] With the improvement of electric energy meter technology, power bureaus and users have higher and higher requirements for the quality and reliability of electric energy meters, but there are still some users who use certain technical means to interfere with electric energy meters, for example, on electric energy meters Install magnets to generate a strong magnetic field, which affects the normal measurement of the electric energy meter and implements the act of stealing electricity, so as to achieve the purpose of paying less electricity bills for individuals, which makes the power bureau face great losses

like figure 1 As shown, most of the current energy meters use the combination of manganese copper and current transformers for sampling and measurement. Under external interference such as strong magnetism, the current transformers are easily affected by the magnetic field due to their own characteristics, which will lead to changes in pulse output. , so that the electric energy meter measures less electricity, and the existing electric energy meter cannot record various parameters of the electric energy meter during the period of strong magnetic interference, so the subsequent electric power bureau cannot recover, so the existence of a strong magnetic field will greatly affect the electric power bureau At the same time, this kind of stealing behavior is also unfair to normal users, which may cause some users to follow suit, thus forming a vicious circle. Therefore, it is necessary to improve the measurement method of the existing electric energy meter

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