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

A three-phase, three-wire, discrimination method technology, applied in the field of electric power systems, can solve the problem of inability to analyze the wiring situation of three-phase, three-wire electric energy meters, without considering the limitations of three-phase, three-wire electric energy meters not collecting neutral point voltage, and long calculation time and other problems, to avoid on-site manual wrong wiring judgment, improve accuracy and correction efficiency, and save manpower and material resources

Active Publication Date: 2021-09-21
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment 1

[0025] This embodiment provides a method for judging the wiring of a three-phase three-wire electric energy meter. Based on the current DI-T-645-2007 multi-function electric energy meter communication protocol, only the collected data is used for online discrimination, and there is no need to connect with the preset 48 connection methods. By comparing one by one, the problem of large amount of discriminant computation and long running time is solved, and the discriminant efficiency is improved. Specifically, it includes: according to the comparison result of the three-phase voltage and the neutral point voltage, the input direction of the A-phase current and the C-phase current, and the Bit0 and Bit1 of the running status word 7 of the electric energy meter, the status word of the connection mode of the electric energy meter is obtained. The current wiring method is judged.

[0026] Based on the analysis of the prior art, the main reason that affects the efficiency of judging ...

Embodiment 2

[0051] This embodiment provides an electric energy meter, including: a data acquisition unit, a data processing unit, and computer instructions stored in the data processing unit and running on the data processing unit;

[0052] The data acquisition unit is used to acquire three-phase voltage, neutral point voltage, phase A current and phase C current;

[0053] When the data processing unit is configured to execute the computer instruction, the method for judging the connection of the three-phase three-wire electric energy meter according to the first aspect is realized, and the current connection mode of the electric energy meter is obtained.

[0054] The electric energy meter further includes a display unit, which displays the current wiring mode of the electric energy meter obtained in real time;

[0055] The electric energy meter further includes an alarm unit, which alarms the wrong wiring of the current connection mode of the electric energy meter.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04G01R31/67
CPCG01R35/04G01R31/67
Inventor 宫晓珊马晓路张丰一王维康朱蕾王凯旋
Owner STATE GRID SHANDONG ELECTRIC POWER
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