Smart electricity meter with function of monitoring and protecting power failure

Abstract

A smart electricity meter with a function of monitoring and protecting power failure comprises a metering chip, a leakage current sampling circuit, a phase current sampling circuit, a phase voltage sampling circuit, a CPU (central processing unit), a power module and a low voltage breaker. The leakage current sampling circuit is electrically connected with the metering chip which is mutually electrically connected with the CPU. The CPU is electrically connected with the low voltage breaker through a trip output port. The low voltage breaker is electrically connected with the CPU through a status acquisition interface. The invention further provides a power failure monitoring and controlling method of the smart electricity meter. The smart electricity meter has the advantages that the reliable power module for power failure protection and control is provided, various types of power failure warning and protection are provided, failure warning and failure protection for voltage, current, power and the like are achieved for power users, failure spots are prevented and isolated, economic loss and personal safety accidents due to failure of electric circuit equipment of the users are prevented and reduced, and reliability of low voltage grids is effectively improved.

Description

technical field [0001] The invention relates to the field of low-voltage power grid power measurement and protection equipment, in particular to an intelligent electric energy meter with the function of monitoring and protecting power consumption faults. Background technique [0002] According to the definition of the smart meter of the State Grid Corporation of China, the smart energy meter is composed of a measurement unit, a data processing unit, a communication unit, etc., and has functions such as electric energy measurement, information storage and processing, real-time monitoring, automatic control, and information interaction. Therefore, the existing smart energy meters do not have the functions of monitoring and protecting power failures. [0003] The technical equipment in the field of intelligent low-voltage switching appliances has made great progress in recent years, and intelligent switching appliances such as intelligent low-voltage integrated protectors, int...

AI Technical Summary

Problems solved by technology

[0006] The low-voltage power grid is the weakest link in the technology and equipment of smart grid construction. At present, the technology and equipment in the field of low-voltage power grid are difficult to meet the needs of smart grid.

Specifically, the smart energy meter is still limited to the functions of electric energy metering, billing and related information interaction, and the intelligent low-voltage switchgear is still limited to the functions of electrical monitoring and electrical protection. Intelligent terminal equipment with various functions

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