Electric energy metering device overall error detecting method, device and system

An electric energy metering device and overall error technology, which is applied in the field of overall error inspection of electric energy metering devices, can solve the problems that the large number of metering devices in use cannot be detected according to laws and regulations, and the overall error cannot be detected, so as to improve the credibility and realize self-control. Check the effect

Active Publication Date: 2017-01-18
侯飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem that the overall error cannot be detected in the prior art, the error of the current transformer and voltage transformer of the metering device mus

Method used

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  • Electric energy metering device overall error detecting method, device and system
  • Electric energy metering device overall error detecting method, device and system
  • Electric energy metering device overall error detecting method, device and system

Examples

Experimental program
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Effect test

Embodiment 1

[0056] An embodiment of the present invention provides a method for self-checking the error of an electric energy metering device. The system to be tested for which the error self-checking method is applicable is a non-energy-consuming system, and the incoming electric energy metering device flows through the system to be tested. The sum of the electric energy is equal to the sum of the electric energy flowing through the outgoing electric energy metering device in the system under test, such as figure 1 As shown, the method includes the following steps:

[0057] In step 201, at least one error standard with known overall error value is connected to the system under test.

[0058] The error standard includes an electric energy metering chip and its circuit, a voltage sensor and a current sensor; wherein, the electric energy metering chip and its circuit, voltage sensor and current sensor are shielded to reduce the influence of electromagnetic interference to a preset threshold...

Embodiment 2

[0076] The overall error is introduced in Embodiment 1, and the method of how to solve the overall error of each electric energy metering device in the system to be tested is given through the method provided in Embodiment 1. Embodiment 2 focuses on the difference between the overall error and the average error, and gives a relatively clear definition.

[0077] Such as image 3 As shown, it is a schematic diagram of the structure of the existing electric energy metering device, which has been introduced in Embodiment 1. The electric energy metering device described in this embodiment specifically refers to a whole composed of current transformers, voltage transformers and electric energy meters. In the prior art, the current transformer and the voltage transformer are usually produced by manufacturers as different devices from the electric energy meter, and there may be errors in the three in practical applications. Looking at the errors of the three alone, the error of the v...

Embodiment 3

[0081] In Embodiment 1, it is explained how to calculate each electric energy metering device based on accessing at least one error standard with known overall error value and further combining the electric energy data recorded and reported by each electric energy metering device in the system to be tested according to the preset method The overall error method. In order to further enable those skilled in the art to understand how to calculate the overall error of each electric energy metering device based on the received electric energy data, this embodiment provides a method for segmental preprocessing according to the load current, such as Figure 5 shown, including:

[0082] In step 301, the error processor receives the electric energy data sent by the electric energy metering device A, sorts and screens the electric energy data, and determines the load current segment to which the electric energy data belongs.

[0083] Wherein, in the first manner, the load current segme...

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PUM

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Abstract

The invention is applicable to the field of electric energy metering and provides an electric energy metering device error self-checking method, device and system. The method comprises the steps that a system to be detected accesses the error criterion device of at least one known overall error value, wherein the error criterion device comprises an electric energy metering chip, a circuit thereof, a voltage sensor and a current sensor; each electric energy metering device and the error criterion device measure and record the respective electric energy data in a preset manner and report the data to a data processor; and an error calculator calculates the overall error of each energy metering device according to received and processed electric energy data and load current segment consideration. According to the embodiment provided by the invention, overall error self-checking of the electric energy metering device is realized; the problems that an overall error cannot be detected; errors of a current transformer and a voltage transformer of the metering device are detected in the field in the case of black out; and a large number of metering devices cannot be detected according to the law in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of electric energy metering, and in particular relates to a method, device and system for checking the overall error of an electric energy metering device. Background technique [0002] For the electric energy metering device in use, it is very difficult to judge whether the metering error is out of tolerance. The main reasons are: 1. The electric energy metering device is usually composed of three components: a current transformer, a voltage transformer and an electric energy meter. Its device error is a composite error calculated from the measurement accuracy of the three components. The use of synthetic error has drawbacks: it is not directly measurable. What's more serious is that the real overall error of the electric energy metering device may be greater than its integrated error and it is not easy to measure. 2. The on-site verification of the current transformer and voltage transformer errors must be carrie...

Claims

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Application Information

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IPC IPC(8): G01R35/04
Inventor 侯飞
Owner 侯飞
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