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Power distribution Internet of Things metering device and distribution transformer terminal

A metering device and Internet of Things technology, applied in the electrical field, can solve the problem of low measurement accuracy of zero-sequence lines and achieve the effect of reducing inaccurate data calculation

Pending Publication Date: 2020-05-15
WILLFAR INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies of the prior art above, the purpose of the present invention is to provide a power distribution Internet of Things metering device and a distribution transformer terminal, which can solve the problem of low measurement accuracy of zero-sequence lines in distribution stations

Method used

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  • Power distribution Internet of Things metering device and distribution transformer terminal
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  • Power distribution Internet of Things metering device and distribution transformer terminal

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Experimental program
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Embodiment 1

[0027] Please refer to Figure 1-Figure 4 , The present invention provides a power distribution Internet of Things metering device, which is characterized by comprising: a three-phase voltage collector 1, a three-phase current collector 2, a zero sequence current collector 3, a meter 4, a metering manager 5 and a memory 6;

[0028] The three-phase voltage collector 1, the three-phase current collector 2, the zero-sequence current collector 3 are respectively connected to the meter 4; the meter 4 and the memory 6 are respectively connected to the meter The manager 5 is connected; the meter 4 and the metering manager 5 are respectively connected with the upper computer. Preferably, the memory 6 and the metering manager 5 are connected through I2C (Inter-Integrated Circuit, serial communication bus).

[0029] Specifically, the A / B / C three-phase voltage signal detected by the three-phase voltage collector 1 in the distribution line, the A / B / C three-phase current signal detected by th...

Embodiment 2

[0037] The present invention also provides a distribution transformer terminal, which includes the power distribution Internet of Things metering device described in Embodiment 1. It can meet the requirements of analog quantity acquisition functions such as voltage and current, and measure voltage, current, power, power factor, etc. Its measurement accuracy should reach 0.5S, voltage error limit: ±0.5%; current error limit: ±0.5% ; Frequency error limit: 0.01Hz; Active power error limit: ±1%; Reactive power error limit: ±1%; Power factor error limit: ±1%; Apparent power error limit: ≤±1.0%; Electrical measurement error Limit: 1.0%.

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Abstract

The invention relates to a power distribution Internet of Things metering device and a distribution transformer terminal. The power distribution Internet of Things metering device comprises a three-phase voltage collector, a three-phase current collector, a zero-sequence current collector, a meter, a metering manager and a memory, wherein the three-phase voltage collector, the three-phase currentcollector and the zero-sequence current collector are respectively connected with the meter; the meter and the memory are respectively connected with the metering manager; and the metering manager isin communication connection with an upper computer. Compared with the prior art, the power distribution Internet of Things metering device and the distribution transformer terminal provided by the invention has the advantages that a single zero-sequence line current detector is used for measuring the zero-sequence line in real time, accurate data reading can be achieved without secondary processing of data by the upper computer, the situation that data calculation is inaccurate due to data interference items of the line in actual operation in the calculation process is reduced, and great progress is achieved.

Description

Technical field [0001] The invention relates to the electrical field, in particular to a power distribution Internet of Things metering device and a distribution transformer terminal. Background technique [0002] The traditional three-phase four-wire measurement method has only six measurement ADCs, which can only measure 3 voltages and 3 currents. Among them, the zero sequence voltage / zero sequence current needs to be calculated by software, and there are calculation errors and large errors. Representative chips of this type of metering program include 71M6515, 71M6513, HT7036, 90E32, etc. Some of the above-mentioned measurement chips also have a small dynamic range. For example, the dynamic range of 71M6515 / 71M6513 is only 2000:1, the number of sampling points per week is small, and the number of ADC bits is small. These make the traditional measurement schemes not meet the requirements of harmonic analysis, load analysis, Relevant power quality analysis content such as stati...

Claims

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Application Information

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IPC IPC(8): G01R22/10
CPCG01R22/10
Inventor 黎毅辉范律肖林松李俊汤可孙煦刘志勇李耀
Owner WILLFAR INFORMATION TECH CO LTD