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Switching Method of Reference Voltage of Smart Meter

A reference voltage, smart meter technology, applied in the direction of measuring electrical variables, instruments, measuring devices, etc., can solve problems such as failure to use normally, reduce the flexibility and compatibility of smart meter applications, and large differences in grid voltage, so as to ensure normal and stable work Effect

Active Publication Date: 2020-07-31
SHENZHEN KAIFA TECH (CHENGDU) CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, because most of the smart meters are designed to only work in a certain reference voltage range, that is, the existing smart meters have a single reference voltage, so the switching of multiple reference voltages needs to be implemented in software
[0003] Combined with the current various grid environments, the grid voltage varies greatly, including medium voltage, high voltage, and low voltage. This will lead to the phenomenon that the same smart meter cannot be used normally in different grid environments.
In existing practical applications, if a smart meter is to work in another reference voltage environment other than the preset one, the software of the smart meter needs to be re-upgraded, which greatly reduces the flexibility of the smart meter application and the software Compatibility, which is not conducive to the normal and stable operation of the metering module

Method used

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  • Switching Method of Reference Voltage of Smart Meter

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Embodiment Construction

[0024] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings of this specification.

[0025] The invention proposes a switching method of a reference voltage of an intelligent electric meter. The idea of ​​this switching method roughly includes: First, the workflow of the metering module is as follows: after the original analog signal input from the outside is reduced by the ratio and converted from analog to digital (A / D, Analog / Digital), it becomes a metering module that can detect, manipulated digital signals. After conversion coefficient processing, it becomes the value of the original input signal for display or system monitoring. Among them, the conversion coefficient is determined by the reference voltage and other factors. Other factors have been fixed during hardware design, and fixed values ​​can be written in the program.

[0026] When the reference voltage needs to be modified, ...

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Abstract

The invention relates to a reference voltage switching method of an intelligent electric meter. The method comprises that two switching mechanisms are used; according to one switching mechanism, the reference voltage is switched by only receiving a setting command of an external application programming interface; and according to the other switching mechanism, the present power-grid voltage is monitored, and the reference voltage is switched when the power-grid voltage is beyond the present reference voltage range. Thus, reference voltages can be switched manually or automatically, and normaland stable work of a metering module is ensured.

Description

technical field [0001] The invention relates to a smart electric meter, in particular to the switching of the reference voltage of the smart electric meter. Background technique [0002] At present, the development of smart grid is very rapid. Among them, metering is the most basic function of smart meters, and various metering chip manufacturers have also launched a variety of high-performance metering chips or SOC (System-on-a-Chip) chips that include metering functions. However, since most of the smart meters are designed to work only in a certain reference voltage range, that is, the existing smart meters have a single reference voltage, so the switching of multiple reference voltages needs to be implemented in software. [0003] Combined with the current various grid environments, the grid voltage varies greatly, including medium voltage, high voltage, and low voltage. This will cause the phenomenon that the same smart meter cannot be used normally in different grid en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/06
CPCG01R22/061
Inventor 张良柱
Owner SHENZHEN KAIFA TECH (CHENGDU) CO LTD