Method and apparatus for checking global error of high voltage energy metering installation

A technology for measuring devices and high-voltage electric energy, which is applied to measuring devices, measuring electrical variables, instruments, etc., can solve the problems of lack of measurement accuracy of high-voltage electric energy measuring devices and inability to calibrate the error accuracy of measuring devices, and achieve the effect of improving calibration efficiency.

Inactive Publication Date: 2008-08-27
WUHAN GUOCE SCI & TECH
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Problems solved by technology

However, the result of theoretical calculation in this way cannot calibrate the overall error accuracy of the metering device, and there is no direct detection method to determine the overall metering accuracy of the high-voltage electric energy metering device
At the same time, with the emergence of high-voltage electric

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  • Method and apparatus for checking global error of high voltage energy metering installation
  • Method and apparatus for checking global error of high voltage energy metering installation
  • Method and apparatus for checking global error of high voltage energy metering installation

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[0031] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0032] see figure 1 As shown, it is a flow chart of the overall error checking method of the high-voltage electric energy metering device of the present invention; the steps it includes are:

[0033] Step a: preset at least one set of high voltage and high current signals;

[0034] Step a': detecting the voltage, current amplitude and phase of the high voltage and high current signals, and comparing them with preset parameters, thereby adjusting the high voltage and high current signals;

[0035] Step b: Generate a corresponding standard electric energy value by obtaining the voltage value and current value corresponding to each group of high voltage and high current signals;

[0036] Step c: the high-voltage electric energy metering device obtains each set of high-voltage and high-current signals and ge...

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Abstract

The invention relates to an overall error checking method and device of a high voltage electric energy metering device, wherein the device comprises a high-voltage heavy-current testing power source, a checking object, a testing power source stability degree control circuit, a monitoring unit and a benchmark electric energy measuring unit, wherein the high-voltage heavy-current testing power source is used to provide stable and reliable high-voltage heavy-current testing signal; the checking object, which is a high-voltage electric energy metering device, obtains the high-voltage heavy-current signal and generates detecting electric energy value; the testing power source stability degree control circuit is used to detect the amplitude and the phase of the voltage and the current of the high-voltage heavy-current testing signal; the monitoring unit sets needed detecting flow, testing voltage, current and power factor, and obtains the detecting result of the testing power source stability degree control circuit to control the output state of the high-voltage heavy-current testing power source; the benchmark electric energy measuring unit, which obtains the high-voltage heavy-current signal and generates a standard electric energy value, compares the standard electric energy value with the detecting electric energy value at the same time to obtain wattful or wattless electric energy measuring error.

Description

technical field [0001] The invention relates to a calibration technology of a power metering device, in particular to a method and device for checking the overall error of a high-voltage power metering device. Background technique [0002] The existing method for calibrating high-voltage electric energy metering devices is to detect each part of the device, including voltage transformers, current transformers, multi-function electric energy meters, and the voltage drop of the secondary line of the voltage transformer, to obtain the errors of each part, Then the measurement accuracy is controlled by the comprehensive error calculation method. However, the results of such theoretical calculations cannot calibrate the overall error accuracy of the metering device, and there is no direct detection method to determine the overall metering accuracy of the high-voltage electric energy metering device. At the same time, with the emergence of high-voltage electric energy meters, thi...

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Application Information

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IPC IPC(8): G01R35/00G01R35/04
Inventor 侯铁信卜正良徐芝贵张乐平郭琳云杨晓伟李优仪
Owner WUHAN GUOCE SCI & TECH
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