Method for generating wiring phasor diagram by using inner data of intelligent ammeter

A smart electric energy meter, internal data technology, applied in the direction of measuring electric variables, phase angle between voltage and current, measuring devices, etc., can solve problems such as wiring errors, time-consuming and labor-intensive, and achieve good results

Active Publication Date: 2014-03-26
JIANGSU ELECTRIC POWER COMPANY YANGZHOU POWER +3
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AI Technical Summary

Problems solved by technology

It is time-consuming and labor-intensive to connect the on-site calibrator, change the metering circuit, and remove it, and it will lead to secondary wiring errors

Method used

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  • Method for generating wiring phasor diagram by using inner data of intelligent ammeter
  • Method for generating wiring phasor diagram by using inner data of intelligent ammeter
  • Method for generating wiring phasor diagram by using inner data of intelligent ammeter

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Embodiment Construction

[0023] Principle of the present invention is specifically described as follows:

[0024] (1) The first part of the technical solution: By reading the status word, three-phase voltage, current, active power, and reactive power data inside the smart energy meter at the same time, judge whether the voltage and current of each phase are based on the three-phase voltage and current values. Normal, judge the voltage phase sequence according to the status word, and generate the voltage phasor diagram.

[0025] (2) The second part of the technical solution: taking the voltage as the reference, generating the current phasor diagram. The key to determining the current vector is to find the phase angle with the voltage vector The active power and reactive power of each phase are required, which can be realized through calculation. use the formula 1=Q1 / P1, 1=atan(Q1 / P1), it should be noted that the value of atan is -90°~90°. Applicable when P ≥ 0, when P ≤ 0, 180° should be added....

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Abstract

The invention discloses a method for directly generating a wiring phasor diagram by using inner data of an intelligent ammeter. The method comprises the following steps of extracting effective information from information of powerful inner data of the intelligent ammeter; directly generating the wiring phasor diagram of an ammeter metering loop by using software of a computer; and examining whether wires of a metering device are connected to one another mistakenly or not by using the wiring phasor diagram instead of a field calibration instrument. By using the method, field wiring is eliminated, and data are directly read from an infrared communication port or an RS485 communication port of the ammeter, and can also be remotely read from an electricity utilization information acquiring system; online monitoring of the metering device is realized; workers do not need to read the data on spot; and the method has a high effect during practical application.

Description

technical field [0001] The invention relates to a method for generating a wiring phasor diagram by utilizing internal data of an intelligent electric energy meter. It belongs to the technical field of electric energy measurement. Background technique [0002] The three-phase four-wire electric energy metering device connected through the transformer is connected to the three-phase voltage and three-phase current loop at the same time, which is prone to wiring errors. It is required to use the electric energy meter field calibrator to check whether the metering device is connected correctly after power supply. Connecting the on-site calibrator, changing the metering circuit, and removing it will not only take time and effort, but also cause secondary wiring errors. [0003] The invention extracts effective information from the powerful internal data information of the intelligent electric energy meter, uses computer software to directly generate the phasor diagram of the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R25/00
Inventor 张社国李新家王蓉潘洋陈玉琴封春芳许飚金辉窦竞陈思远
Owner JIANGSU ELECTRIC POWER COMPANY YANGZHOU POWER
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