Three-phase electric energy metering module and calibrating method thereof

A technology of electric energy metering and three-phase electricity, which is applied in the direction of measuring electric variables, measuring devices, measuring time integration, etc., can solve problems such as inaccurate measurement, achieve the effect of improving measurement accuracy and solving inaccurate measurement

Active Publication Date: 2018-03-30
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a three-phase electric energy metering module and its calibration method to at least solve the problem of inaccurate measurement of the three-phase electric energy metering module in the prior art

Method used

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  • Three-phase electric energy metering module and calibrating method thereof
  • Three-phase electric energy metering module and calibrating method thereof
  • Three-phase electric energy metering module and calibrating method thereof

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Embodiment 1

[0024] Embodiment 1 of the present invention provides a three-phase electric energy metering module, specifically, figure 1 An optional structural block diagram of the three-phase electric energy metering module is shown, such as figure 1 As shown, the three-phase electric energy metering module may include: a three-phase electrical input channel 11; a three-phase electrical calculation channel 12; a multiplexer switch 13; and a controller 14; Realize the connection of different combinations of the three-phase electrical input channel and the three-phase electrical calculation channel.

[0025] During specific implementation, the three-phase electrical input terminal includes a three-phase current input terminal and / or a three-phase voltage input terminal; correspondingly, the three-phase electrical calculation channel includes a three-phase current calculation channel and / or a three-phase voltage calculation channel. That is to say, the three-phase electric energy measuring ...

Embodiment 2

[0029] In this embodiment, a method for voltage calibration of the above-mentioned three-phase electric energy metering module is provided. Specifically, image 3 An alternative flow chart showing the method, as image 3 As shown, the method includes the following steps S301-S305:

[0030] S301, controlling the multiplexer switch to be in a first open state, wherein, in the first open state, a three-phase electrical input channel is in one-to-one communication with a corresponding three-phase electrical calculation channel;

[0031] S302, calculate the voltage value output by each channel in the three-phase electrical calculation channel;

[0032] S303, according to the calculated voltage values ​​output by each channel in the three-phase electric calculation channel, determine whether there is a voltage calculation channel with deviation;

[0033] S304, when it is determined that there is a voltage calculation channel with deviation, determine the voltage calculation channe...

Embodiment 3

[0039] In this embodiment, the method for current calibration of the above-mentioned three-phase electric energy metering module is provided. Specifically, Figure 4 An alternative flow chart showing the method, as Figure 4 As shown, the method includes the following steps S401-S405:

[0040] S401, controlling the multiplexer switch to be in a first open state, wherein, in the first open state, a three-phase electrical input channel is in one-to-one communication with a corresponding three-phase electrical calculation channel;

[0041] S402, calculate the current value output by each channel in the three-phase electric calculation channel;

[0042] S403, according to the calculated current value output by each channel in the three-phase electric calculation channel, determine whether there is a deviation current calculation channel;

[0043] S404, when it is determined that there is a current calculation channel with deviation, determine the current calculation channel with...

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Abstract

The invention discloses a three-phase electric energy metering module and a calibrating method thereof. The three-phase electric energy metering module comprises a three-phase electricity input channel, a three-phase electricity calculating channel, a multi-channel selecting switch and a controller; and the controller is used for controlling switch-on and switch-off of the multi-channel selectingswitch so as to communicate the three-phase electricity input channel with the three-phase electricity calculating channel in different combination modes. The problems that in the prior art, the three-phase electric energy metering module inaccurately measures possibly is solved, and the measuring precision of the three-phase electric energy metering module is improved.

Description

technical field [0001] The invention relates to the technical field of three-phase electricity measurement, and in particular, to a three-phase electricity measurement module and a calibration method thereof. Background technique [0002] In recent years, with the planning of energy Internet construction, three-phase smart meters have developed rapidly. Wide range and high reliability are the development trends of three-phase energy metering modules at this stage. Among them, the measurement accuracy of the metering module is an important factor determining its reliability. However, in the process of research and application, it is found that the factory-calibrated three-phase electric energy metering module may be disturbed during use, and the measurement error of a certain phase channel may be larger than the set standard with a certain small probability. error, thus affecting the reliability of power measurement. [0003] Aiming at the problem of inaccurate measurement ...

Claims

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Application Information

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IPC IPC(8): G01R11/00G01R22/10G01R35/04
CPCG01R11/00G01R22/10G01R35/04
Inventor 廖冠尧赵志刚任鹏文武叶王建邓军
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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