Electric energy meter data interface satisfying IR46 metering independence requirements and verifying method

A technology of data interface and electric energy meter, applied in the field of electric energy meter, can solve problems such as inability to achieve independence, achieve great application value and improve robustness

Active Publication Date: 2016-09-28
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the previous analysis, the design mode of CPU+metering chip or CPU+DSP adopted by the electric energy m

Method used

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  • Electric energy meter data interface satisfying IR46 metering independence requirements and verifying method
  • Electric energy meter data interface satisfying IR46 metering independence requirements and verifying method
  • Electric energy meter data interface satisfying IR46 metering independence requirements and verifying method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] As shown in the figure, the electric energy meter data interface that meets the IR46 metering independence requirements provided by this embodiment is characterized in that it includes a legal metering component and a non-legal metering component, and the non-legal metering component includes a display module, a communication module, a storage module and a computing module; the legal metrology component includes a clock module, a metering module and a sampling module;

[0049] The clock module is connected to an external RTC to obtain a clock, and the basic time unit is obtained by frequency division of an internal timer;

[0050] The sampling module is used to collect and convert external voltage and current analog signals into digital signals;

[0051] The metering module calculates minute incremental electric energy accumulation and real-time measurement data through clock signal control;

[0052]The calculation module reads the minute incremental electric energy an...

Embodiment 2

[0076] The energy meter data interface provided by this embodiment that meets the IR46 measurement independence requirements divides the energy meter into legal metering components and non-legal metering components. Measuring electric energy, reading the current total electric energy, and reading the current real-time data several interfaces to exchange data;

[0077] The configuration accuracy calibration parameter interface is only used before the energy meter leaves the factory, and is used by the energy meter manufacturer to calibrate the accuracy of the energy meter. After the energy meter is set to the factory state, this interface is automatically disabled. The content of this interface is to write the calibrated parameters from the non-legal metering component to the legal metering component, including the angle difference of voltage and current, and the ratio adjustment coefficient;

[0078] The update system time interface is used for updating the time to the legal m...

Embodiment 3

[0097] see figure 1 , the electric energy meter data interface that meets the IR46 metering independence requirements provided by the present invention divides the electric energy meter into legal metering components and non-legal metering components. Measuring electric energy, reading current total electric energy, and reading current real-time data several interfaces to exchange data. Due to the need to define a new power data interface, the existing metering chip cannot meet the requirements, so the implementation method of CPU+DSP is adopted, and the non-legal metering component is composed of the CPU as the core, and the legal metering component is composed of the DSP as the core. Among them, the outside of the DSP is directly connected to the RTC chip 8025, and an expanded 32KB FRAM (ferroelectric memory, which will not be lost after power off after storage) is used to cache minute incremental power. Connect by I2C bus between DSP and ARM, wherein ARM is main frame, DSP...

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PUM

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Abstract

The invention discloses an electric energy meter data interface satisfying IR46 metering independence requirements. The electric energy meter data interface comprises a legal metering assembly and a non-legal metering assembly wherein the non-legal metering assembly comprises a display module, a communication module, a storage module and a calculation module, and the legal metering assembly comprises a clock module, a metering module and a sampling module. Total electric energy, rate electric energy and required amount are calculated according to minute incremental electric energy acquired by the data interface, and the legal metering assembly and the non-legal metering assembly are completely isolated from each other to ensure the metering independence of an electric energy meter. The invention also provides a verifying method for measuring independence under the interface mode, and the method can effectively verify whether an interface method of minute increment electrical energy is adopted and whether the precision after adopting the interface meets the requirements. To improve the robustness of electric energy meter software, it is of great value to design a meter which meets the requirement of IR46 metering independence and to test and verify the independence of the electric energy meter.

Description

technical field [0001] The invention relates to the field of electric energy meters, in particular to an electric energy meter data interface meeting IR46 measurement independence requirements, and a verification method for the interface. Background technique [0002] At present, the electric energy meter basically adopts the design mode of CPU+measurement chip, and a few high-precision electric energy meters adopt the mode of CPU+DSP, in which the metering chip and DSP are used for sampling and calculation, and output the total electric energy after power-on or the last reading. The accumulated electric energy and real-time measurement data are sent to the CPU, and then the CPU is used to calculate the historical total electric energy, electric energy of each rate, demand, etc., and complete meter reading and other data presentation functions through man-machine interface and communication. Regardless of the design mode, the various functions of the CPU are mixed together a...

Claims

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Application Information

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IPC IPC(8): G01R22/06G01R35/04
CPCG01R22/061G01R35/04
Inventor 欧习洋侯兴哲曾幼松王新华周孔均周全李享友张进吉畅朱英杨慧陈坚占子飞
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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