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Table look-up scheme-based electric energy metering device calibration coefficient calculation method

An energy metering device and a technology for calibrating coefficients, which are applied in the direction of measuring devices, measuring electrical variables, instruments, etc., to achieve the effect of reducing investment, reducing development difficulty, and reducing program complexity

Inactive Publication Date: 2017-04-26
INTEGRATED ELECTRONICS SYST LAB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the efficiency of mass production, and the product consistency is also improved accordingly, but it needs to put forward higher requirements for the meter calibration table, and each additional specification of the device needs to be upgraded accordingly

Method used

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  • Table look-up scheme-based electric energy metering device calibration coefficient calculation method
  • Table look-up scheme-based electric energy metering device calibration coefficient calculation method
  • Table look-up scheme-based electric energy metering device calibration coefficient calculation method

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Embodiment Construction

[0031] The specific implementation of the present invention will be described below by taking the national grid electricity information collection terminal equipped with Ruinengwei RNV8302B chip as an example:

[0032] 1. Develop meter calibration software with the following functions:

[0033] 1.1 Set the power source voltage, current, and phase angle functions.

[0034] 1.2 Read standard meter voltage, current, active and reactive power functions.

[0035] 1.3 Communicate with the metering device, and issue parameters such as voltage, current, and power.

[0036] 2. Development of calibration software modules for electric energy metering devices

[0037] 2.1 Define the specification parameter structure

[0038]

[0039]

[0040] 2.2 Define specification parameter constant table

[0041]

[0042] The specification parameter constant table is obtained by calculating the actual specification requirements, specific metering chips, and sampling channel parameters.

...

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Abstract

The invention discloses a table look-up scheme-based electric energy metering device calibration coefficient calculation method. According to the method, the data of corrected voltage, corrected current, corrected power and other metering data are issued by meter correction software except a metering device. After that, the metering device completes the error calculation according to specification parameters and then converts an obtained error into a calibration coefficient. The calibration coefficient is stored in a metering chip. Simultaneously, when the metering device is not calibrated or fails to acquire the calibration coefficient, the metering device conducts the electric energy metering operation according to a default calibration coefficient acquired through the specification parameter-based table searching process. According to the technical scheme of the invention, the calibration coefficient is automatically calculated, and the labor investment is reduced. The calibration error is calculated by the metering device and is not dependent of a particular calibration meter. The calibration coefficient is acquired through arranging a parameter look-up table, so that the coefficient reliability is improved. The program complexity is reduced.

Description

technical field [0001] The invention relates to the field of electric energy metering, in particular to a method for calculating a calibration coefficient of an electric energy metering device based on a look-up table method. Background technique [0002] The production of electricity is different from the production of other products. It is characterized by the fact that the three departments of power generation, supply, and use are connected into one system and completed simultaneously without interruption, and are closely related to each other. How to sell, how to calculate economically, A measuring instrument is needed to measure between the three departments and calculate the amount of electric energy. This device is the electric energy metering device. Without it, sales and transactions cannot be carried out in the three aspects of power generation, supply and consumption. [0003] Electric energy metering device is a general term for electric meters and equipment wit...

Claims

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Application Information

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IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 李先刚董岱岳方洁胡国龙刘光孙少秋
Owner INTEGRATED ELECTRONICS SYST LAB
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