Three-phase three-wire electric energy meter wiring discrimination method, electric energy meter and equipment

Abstract

The invention discloses a three-phase three-wire electric energy meter wiring discrimination method, an electric energy meter and equipment. The method comprises the steps of: obtaining an electric energy meter wiring mode status word according to a result of the comparison between a three-phase voltage and a neutral point voltage, the input directions of an A-phase current and a C-phase current, and Bit0 and Bit1 of an electric energy meter operation status word 7; and carrying out discrimination on a current wiring mode of an electric energy meter according to the electric energy meter wiring mode status word. On the basis of an existing DI-T-645-2007 multifunctional electric energy meter communication protocol, online judgment is achieved through the mode of obtaining the electric energy meter wiring mode status word corresponding to the electric energy meter wiring mode, one-by-one comparison is not needed, the problems of large calculation amount and long operation time are solved, and the judgment efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method for judging the wiring of a three-phase three-wire electric energy meter, an electric energy meter and equipment. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, the traditional three-phase three-wire electric energy meter misconnection analysis method is often to use multimeter, calibrator and other instruments for on-site measurement, and to compare and analyze the measured voltage, current, phase angle and other data by drawing a phasor diagram. , the three-phase three-wire electric energy meter is wrongly wired. However, the traditional analysis method requires staff to go to the site, equipped with corresponding measuring instruments, and have good professional quality of measurement. The metering erro...

AI Technical Summary

Problems solved by technology

However, the traditional analysis method requires staff to go to the site, equipped with corresponding measuring instruments, and have good metrological professional quality. Metering error meters are manually detected, and it is difficult to find and judge some misconnections that are difficult to find and overmeter or undermeter

[0004] In recent years, with the rapid development and widespread popularization of multi-functional electronic energy meters and communication technology, miswiring analysis through remote collection of energy meter data has emerged as the times require. Due to the limitation of the neutral point voltage, it is impossible to directly judge the B-phase voltage connection by comparing with the neutral point voltage, and it is impossible to conduct a comprehensive analysis of the connection situation of all three-phase three-wire electric energy meters; and there are some methods to compare the collected data with the preset 48 kinds of connections The methods are compared and analyzed one by one to judge the large amount of computation and long computation time.

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