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Three-phase harmonic measuring device based on wireless transmission

A technology of wireless transmission and measurement device, applied in the direction of measurement device, measurement of electrical variables, instruments, etc., can solve the problems of affecting construction progress, complex installation, hidden dangers, etc., to reduce hidden dangers, improve measurement accuracy, and reduce installation complexity. Effect

Inactive Publication Date: 2019-04-16
JIANGSU FRONTIER ELECTRIC TECH +3
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  • Description
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  • Application Information

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Problems solved by technology

[0003] In some special occasions, it is necessary to use a long cable to connect the voltage and current signals to the metering device. figure 1 As shown, at least 10 cables (4 voltage wires and 6 current wires) are required, the on-site installation is complicated, the cost is high, and it also greatly affects the construction progress, and there are certain safety hazards

Method used

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Embodiment 1

[0023] see figure 2 , a three-phase harmonic measurement device based on wireless transmission of the present invention includes a front-end acquisition unit, a front-end processing unit and a back-end processing unit.

[0024] The front-end acquisition unit includes voltage transformers and current transformers connected in the three-phase line; the front-end processing unit includes an analog-to-digital converter (AD) and a micro-control unit; voltage transformers (PT), current transformers (CT) respectively The front-end voltage and current signals are collected and transformed and transmitted to the analog-to-digital converter; the analog-to-digital converter transmits the converted voltage and current signals to the micro-control unit; the micro-control unit encodes the received signal and transmits it through the wireless channel to the backend MCU controller. Since there are more floating-point operations in the front-end processing, it is advisable to choose a contro...

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Abstract

The invention discloses a three-phase harmonic measuring device based on wireless transmission. The three-phase harmonic measuring device based on the wireless transmission comprises a front-end acquisition unit, a front-end processing unit and a back-end processing unit. The front-end acquisition unit comprises a voltage transformer and a current transformer which are connected in a three-phase line; the front end processing unit comprises an analog-digital converter and a micro-control unit; and the micro-control unit encodes received signals and transmits the signals to the back-end processing unit through a wireless channel. The three-phase harmonic measuring device based on the wireless transmission is applied to electric energy metering industries in an electric power system, and theelectric energy and the harmonic signals are transmitted in a wireless mode, so that the problems of, in certain special occasions, inconvenient wiring, high cost, difficulty in maintenance and the like are solved. Meanwhile, a data smoothing algorithm is adopted, an interference problem to the wireless channel is solved, and metering precision is improved; on-site installation complexity is greatly reduced and potential safety hazards are reduced; and installation workload and time are greatly reduced, and measurement efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power measurement, and in particular relates to a three-phase harmonic measurement device based on wireless transmission. Background technique [0002] The measurement accuracy of electric energy is generally required to be relatively high. At present, most of the occasions use the wired transmission method, that is, after the alternating current is pretreated by isolation and step-down, AD sampling is directly performed, and then the original value sampled by AD is calculated. Obtain the corresponding voltage, current, power, harmonics and other data; shorten the signal transmission distance as much as possible to ensure the measurement accuracy. [0003] In some special occasions, it is necessary to use a long cable to connect the voltage and current signals to the metering device. figure 1 As shown, at least 10 cables (4 voltage wires, 6 current wires) are required, the on-site installation i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16G01R22/10
CPCG01R22/10G01R23/16
Inventor 李新家孙虹熊政喻伟赵勇刘飞汪梦余李平刘述波戚文君戴成涛严永辉徐博赵芮王黎明王松杨颖栾齐麒
Owner JIANGSU FRONTIER ELECTRIC TECH
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