Electricity larceny prevention method for detecting short-circuit electric energy meter

Abstract

The invention discloses an electricity larceny prevention method for detecting a short-circuit electric energy meter, and the method comprises the steps: collecting a current effective value Ui of a secondary circuit of a current transformer and a voltage effective value Uu of a current wiring terminal of an electric energy meter; dividing the voltage effective value Uu of the current wiring terminal of the electric energy meter by a voltage signal effective value obtained through the conversion of the current effective value Ui of the secondary circuit of the current transformer, and obtaining an equivalent voltage resistance value UR of a current coil resistor of the electric energy meter, wherein because the UR is in proportion to the resistance of two ends of the electric energy meter,whether the electric energy meter is in a short-circuit condition for electricity larceny or not can be judged through the detection of the change of the UR value. The method is advantageous in thatthe method can accurately determine a short-circuit electric energy meter electricity larceny condition and a condition that a user does not consume electricity, and can achieve the short-circuit current transformer judgment through the resistance change during the short-circuit condition of the electric energy meter.

Description

technical field [0001] The invention relates to an anti-stealing electric circuit, in particular to an anti-stealing method for detecting a short-circuit electric energy meter. Background technique [0002] In the context of rapid economic development, the demand for electricity is increasing day by day, and the expansion of the electricity sales market has stimulated the development of the entire electricity production. However, with the development of the economy and the increase of electricity consumption, especially with the establishment of the market economy system, the problem of stealing electricity has become more and more prominent, and the country has suffered huge economic losses for this reason. The problem of stealing electricity not only plagues the development of electric power enterprises, but also seriously affects the country's economic construction and social stability. [0003] The metered electric energy depends on the product of voltage, current, powe...

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Problems solved by technology

[0007] (4) Short circuit electric energy meter

The secondary circuit of the open-circuit current transformer can be judged by detecting whether the voltage on the secondary side of the current transformer is abnormal, but for the short-circuited electric energy meter, there is no stable and reliable solution because it is easy to be confused with the user's power-free situation.

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