Electric energy meter zero live wire reverse connection automatic identification circuit and identification method

Abstract

An electric energy meter neutral-live wire reverse connection automatic identification circuit and an electric energy meter neutral-live wire reverse connection automatic identification method belong to the field of low-voltage power line carrier communication and control, and especially relate to an electric energy meter neutral-live wire reverse connection automatic identification circuit and an electric energy meter neutral-live wire reverse connection automatic identification method. The invention provides an electric energy meter neutral-live wire reverse connection automatic identification circuit and an electric energy meter neutral-live wire reverse connection automatic identification method, which are of high thermal efficiency, and are energy-saving and environment-friendly. The circuit comprises a low-voltage power grid transformer, a carrier concentrator, a first intelligent electric energy meter, a second intelligent electric energy meter and a third intelligent electric energy meter, and is structurally characterized in that the phase-A end of the carrier concentrator is connected with the phase-A outlet end of the low-voltage power grid transformer, the phase-B end of the carrier concentrator is connected with the phase-B outlet end of the low-voltage power grid transformer, the phase-C end of the carrier concentrator is connected with the phase-C outlet end of the low-voltage power grid transformer, and the phase-N end of the carrier concentrator is connected with the phase-N outlet end of the low-voltage power grid transformer; and the phase-A end of the first intelligent electric energy meter is connected with the phase A of a power supply line, and the phase-B end of the second intelligent electric energy meter is connected with the phase B of the power supply line.

Description

technical field [0001] The invention belongs to the field of low-voltage power line carrier communication and control, and in particular relates to an automatic identification circuit and an identification method for the reverse connection of zero and live wires of an electric energy meter. Background technique [0002] In the power system, there are common problems such as reverse connection of zero and live wires, unbalanced installation of transformer three-phase line meters, and difficulty in line loss management. Before the collection system is put into use, these problems require power system personnel to use special tools to judge on site, and the efficiency is very low. [0003] Since 2009, State Grid Corporation of China and China Southern Power Grid Corporation have carried out the world's largest smart grid construction project, and a large number of smart meters have been put into use. In the automatic meter reading of smart meters, the low-voltage power line ca...

AI Technical Summary

Problems solved by technology

[0002] In the power system, there are common problems such as reverse connection of zero and live wires, unbalanced installation of transformer three-phase line meters, and difficulty in line loss management.

Before the collection system is put into use, these problems need to be judged by the power system personnel using special tools on site, and the efficiency is very low

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