Portable field calibration system of electric energy meter

A portable, electric energy meter technology, applied in the measurement of electrical variables, instruments, measuring devices, etc., can solve the problems of unconsidered influence and low accuracy of calibration results, and achieve the effects of reducing errors, high measurement accuracy, and simple and convenient operation

Inactive Publication Date: 2016-01-06
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although some current calibration methods are implemented with clamp ammeters, the influence of the open air gap in the calibration is not considered, resulting in low accuracy of the calibration results.

Method used

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  • Portable field calibration system of electric energy meter
  • Portable field calibration system of electric energy meter
  • Portable field calibration system of electric energy meter

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Embodiment Construction

[0027] Such as figure 1 As shown, a portable electric energy meter on-site verification system includes a signal acquisition unit, a voltage sensor and a current sensor are electrically connected to the signal acquisition unit, and the collected standard voltage signal and standard current signal are transmitted to the signal detection unit, and are calibrated The electric energy meter outputs a pulse signal to the signal acquisition unit, and the signal acquisition unit is electrically connected to the calibration platform, and the calibration platform compares the standard voltage signal, the standard current signal with the pulse signal sent by the electric energy meter to be calibrated, so as to calculate the Check the error of the energy meter.

[0028] The verification platform is composed of an industrial computer, on which Labview software is installed, and corresponding verification software is written based on Labview. The calibration platform is used to calculate t...

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Abstract

The invention relates to a portable field calibration system of an electric energy meter. The system comprises a signal acquisition unit. A voltage sensor and a current sensor are connected with the signal acquisition unit electrically. A collected standard voltage signal and a collected standard current signal are transmitted to a signal detection unit; and a calibrated electric energy meter outputs a pulse signal to the signal acquisition unit. The signal acquisition unit is connected with a calibration platform electrically; the calibration platform compares the standard voltage signal and the standard current signal with the pulse signal emitted by the calibrated electric energy meter, thereby calculating an error of the calibrated electric energy meter. According to the portable field calibration system provided by the invention, because the voltage sensor and the current sensor employ open type structures, a running electric energy meter can be calibrated accurately under the circumstances that normal operation of the power system is not affected.

Description

technical field [0001] The invention relates to the field of power system measurement, in particular to a portable electric energy meter field calibration system. Background technique [0002] The accurate measurement of electric energy is the guarantee for the safe and stable operation of the power system, as well as the guarantee for fair and just transactions between power supply companies and users. Therefore, it is necessary to ensure the accuracy of the electric energy meter, which requires regular calibration or maintenance of the electric energy meter. In the on-site verification of the electric energy meter, it is necessary to obtain the secondary output voltage and current of the primary voltage transformer and the primary current transformer as the standard signal, and then perform electric energy measurement through the standard electric energy metering device, and compare the error with the electric energy meter to be verified , calculate the error of the wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
Inventor 邓辉阳龙年俊华徐祎卉李振华李振兴
Owner STATE GRID CORP OF CHINA
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