A safe power supply system

Abstract

The invention relates to a safe electric power supply system, and belongs to the field of electric power systems. The safe electric power supply system comprises a generating station, a power transmission grid, a power distribution transformer, a power distribution grid, a user transformer, a local area power grid, a step-down transformer and an anti-theft electricity meter; the generating station is connected to the power transmission grid for supplying power to the power transmission grid; a primary side of the power distribution transformer is connected to the power transmission grid while a secondary side of the power distribution transformer is connected to the power distribution grid; a primary side of the user transformer is connected with the power distribution grid while a secondary side of the user transformer is connected with the local area power grid; a primary side of the step-down transformer is connected with the local area power grid while a secondary side of the step-down transformer is connected with the anti-theft electricity meter; the anti-theft electricity meter comprises an electricity meter body, an anti-theft transformer and an anti-theft shell; the electricity meter body and the anti-theft transformer are in series connection and the serially connected electricity meter body and the anti-theft transformer are installed in the anti-theft shell; the output end of the anti-theft electricity meter supplies power for loads; the voltage of the local area power grid is higher than the working voltage of the loads; and the input voltage of the anti-theft transformer is lower than the working voltage of the loads. The voltage before entering the electricity meter is the voltage that cannot be used directly for domestic appliances; and the anti-theft electricity meter can be directly used for the loads after the voltage is converted by the anti-theft electricity meter.

Description

technical field [0001] The invention relates to a safe power supply system and belongs to the field of power supply systems. Background technique [0002] An electric energy meter is an instrument used to measure electric energy, also known as an electric meter, a fire meter, or a kilowatt-hour meter, and refers to an instrument for measuring various electrical quantities. Current meter in use. The current coil inside the meter is short-circuited on the lead wire outside the meter to achieve the cheating effect of using electricity without running characters or less characters. This method of stealing electricity is very simple, that is, use a small section of wire outside the meter to short-circuit the two connectors of the meter to achieve the purpose. This method does not destroy the lead seal, the case, does not need to be connected to the open wire, and is easy to camouflage and emergency destruction, so it is adopted by many users. This is a serious social phenomeno...

AI Technical Summary

Problems solved by technology

[0004] Now the phenomenon of stealing electricity has been repeatedly banned, which not only endangers the safety of the power grid, but also brings hidden dangers to electrical equipment and personal safety.

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