Intelligent ammeter electric energy metering device based on NB-IoT

A technology for electric energy metering devices and smart meters, which is applied in measuring devices, measuring electrical variables, instruments, etc., can solve problems such as inaccurate metering, achieve the effects of improving accuracy, reducing voltage errors, and realizing long-distance transmission

Inactive Publication Date: 2017-12-19
ZHENGZHOU QISHUO ELECTRONICS TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is: the present invention provides a smart meter electric energy metering device based on NB-IoT, by setting a voltage comparator and a voltage loss device, the voltage error caused by the environment is included in the metering, which solves the problem of existing neglected The problem of inaccurate measurement caused by differences in the types of electricity users has achieved the effect of eliminating errors caused by environmental factors and improving the accuracy of measurement

Method used

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  • Intelligent ammeter electric energy metering device based on NB-IoT

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Embodiment 1

[0025] Principle of use: The high-voltage power distribution device reduces the voltage and current to a safe measurement range through voltage transformers and current transformers, and then connects them to the sampling circuit for voltage sampling and current sampling. After the voltage sampling results are sent to the voltage comparator, the actual circuit The voltage is compared with the rated voltage. If the actual voltage is higher than the rated voltage, the voltage loss device will generate a negative additional error voltage, and the metering chip will calculate the negative additional error voltage and the rated voltage, and send the calculated voltage result to the processor. Store the data in the memory; if the actual voltage is lower than the rated voltage, the voltage loss device will generate an additional error voltage, the metering chip will calculate the additional error voltage and the rated voltage, and send the calculated voltage result to the processor, an...

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Abstract

The invention discloses a NB‑IoT-based smart meter electric energy metering device, which relates to the field of meter metering devices; it includes a sequentially connected acquisition device, an error detection device, a metering device and a processing component; the acquisition device includes a current transformer, a voltage transformer and sampling circuit; the current transformer and voltage transformer are electrically connected to the sampling circuit respectively; the error detection device includes a voltage comparator and a voltage loss device, the metering device includes a metering chip, and the sampling circuit, voltage comparator, voltage loss The device and the metering chip are electrically connected in sequence; the sampling circuit, the voltage comparator and the metering chip are electrically connected in sequence; the processing component includes a processor and a memory; The error caused by the sampling; after sampling, it is adjusted again through the variable ratio current transformer to reduce the measurement error of seasonal electricity users.

Description

technical field [0001] The invention relates to the field of electric meter metering devices, in particular to an NB-IoT-based smart meter electric energy metering device. Background technique [0002] Electric energy metering devices include various types of electric energy meters, voltage transformers for metering, current transformers for metering and their secondary circuits, and electric energy metering cabinets (boxes), etc. In the various links of power generation, supply, and electricity consumption in the power system, a large number of electric energy metering devices are installed to measure power generation, plant power consumption, power supply, and electricity sales, etc., in order to formulate production plans and do a good job of economic accounting. And provide a basis for metering electricity. [0003] The cellular-based Narrow Band Internet of Things (NB-IoT) has become an important branch of the Internet of Everything; NB-IoT has the following characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R22/06
CPCG01R22/063
Inventor 高翔
Owner ZHENGZHOU QISHUO ELECTRONICS TECH CO LTD
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