A power supply system for a single-phase smart energy meter

Abstract

The invention discloses a power source system of a single-phase intelligent electricity meter. The power source system is used for supplying power for the single-phase intelligent electricity meter. The power source system includes a power source unit, a password protection unit and a control unit. The power source unit includes a rechargeable battery which is charged with single-phase AC current. When electric supply is normal, the single-phase AC is converted for power supply of the electricity meter. When electric supply goes wrong, power supply of the electricity meter is realized through the rechargeable battery. The power source system provided by the invention is applied to the single-phase intelligent electricity meter and can provide uninterrupted power supply. Temporary meter reading work of a meter reading worker is saved. Electricity meter data is continuous and accurate and loss of a power system due to meter reading during a battery changing process is avoided.

Description

technical field [0001] The invention belongs to the technical field of intelligent power supply, and in particular relates to a power supply system for a rechargeable battery of an intelligent electric energy meter. Background technique [0002] The existing single-phase electric energy meter battery cannot be charged. However, no matter what type of battery, it has a certain rated capacity. If it is operated with no load or load for a long time, the battery capacity will continue to decrease. When the battery capacity is about to be exhausted At this time, it will not only cause irreparable defects to the battery, but also affect the normal operation of the electric energy meter system, causing problems such as inaccurate timing or data loss. If the electric energy meter is equipped with a remote alarm system, when the battery voltage is lower than the working voltage, the battery alarm phenomenon will occur, and the alarm signal can be transmitted to the background monitor...

AI Technical Summary

Problems solved by technology

However, the system uses battery energy storage, which is bulky, and cannot achieve overall control, and the degree of intelligence is not enough

[0005] The patent application number is 201210301736.3 discloses a smart electric energy meter, which contains a power supply module to supply power to the electric energy meter. The operation provides a stable power supply; at the same time, the power module contains a set of rechargeable batteries as a backup power supply, which can support the smart energy meter to maintain operation for a period of time after power failure, for data processing, data storage, data communication, display information and send out alarm signals and other operations; however, the patent does not disclose the specific implementation of the power module, nor does it provide protection for the battery; at the same time, the circuit structure of the smart meter system is complex and the cost is high

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