Intelligent electric meter with functions of leakage remote monitoring and protection

Abstract

The invention discloses an intelligent electric meter with functions of leakage remote monitoring and protection, which comprises a metering chip, a phase current sampling circuit, a phase voltage sampling circuit, a central processing unit (CPU), a leakage current sampling circuit and a low-voltage circuit breaker, wherein the leakage current sampling circuit is electrically connected with the metering chip; the metering chip is electrically connected with the CPU; the CPU is electrically connected with the low-voltage circuit breaker by a trip output interface; and the low-voltage circuit breaker is electrically connected with the CPU. The intelligent electric meter has the beneficial effects that fewer components are added and a circuit is changed within a small range based on the intelligent electric meter, and the functions of the intelligent electric meter and an intelligent leakage monitoring protection device can be realized, so that the production cost is greatly lowered; and the leakage condition of a power consumer can be completely monitored by a power supply enterprise, and the leakage fault can be found and eliminated in time, so that the power supply reliability is improved, the electric energy loss can be reduced, and the personal and property loss caused by leakage can be reduced.

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 functions of remote monitoring and protection of electric leakage. 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. The all-electronic smart watt-hour meter is the most advanced type of watt-hour meter in China today. It adopts advanced single-chip technology and a specially designed electric energy measurement integrated circuit. It has high measurement accuracy, prevents electricity theft, low self-loss and high reliability. features. Some of these models ...

AI Technical Summary

Problems solved by technology

The solutions proposed by the above-mentioned disclosed patents and literature are technically feasible, but the comprehensive application maintenance cost is relatively high

Specifically, it is necessary to install a special intelligent leakage protector on the low-voltage power grid; it needs a dedicated communication module and communication channel; Therefore, it is also difficult to popularize and apply intelligent leakage protectors in a large area among power users.

[0007] To sum up, the current smart energy meters and new intelligent leakage protectors produced by existing standards have made great progress in terms of function and technology. In terms of two-way communication and interaction, the intelligent leakage protector has realized the remote monitoring and protection of partial user leakage, but it is still difficult to achieve obvious development in comprehensively improving the safety and reliability of electricity use for users, which is specifically reflected in: (1) Although some intelligent The electric meter has the function of measuring voltage and current, but it does not have the detection function of leakage current, so it is impossible to monitor and manage the leakage situation of power users; (2) The leakage protection of low-voltage power grids and users still generally adopts general leakage protection and branch line leakage protection , Terminal household leakage protection Three-level common type of leakage protector to achieve leakage protection, unable to effectively monitor, adjust, control and protect the leakage of low-voltage power grid and power user equipment remotely

(3) Although some leakage protectors have been intelligentized and have the ability of remote communication, they need independent communication channels, communication equipment and dedicated management master stations, which are generally only used for general leakage protection and branch line leakage protection. Difficult to promote and use on a large scale

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