Device and method for assessing influences, on errors of electric energy meters, of dynamic harmonic waves and temperature changes
A technology of temperature change and electric energy meter, which is applied in the direction of measuring devices, measuring electric variables, instruments, etc., can solve the problem of inability to achieve accurate measurement of electric energy meter measurement errors, and ineffective simulation of power grid harmonics. Changes in temperature and humidity of electric energy meters, harmonics The test waveform cannot fully reflect the field operating conditions of the electric energy meter and other issues
Pending Publication Date: 2019-07-23
GUIZHOU POWER GRID CO LTD
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[0003] The technical problem to be solved by the present invention is to provide a device and method for evaluating the influence of dynamic harmonics and temperature changes on the error of the electric energy meter, so as to solve the problem of using the method and method for the harmonic influence test of the electric energy meter stipulated in GB / T17215 in the prior art. requirements, the proposed harmonic test waveform cannot fully reflect the actual on-site operating conditions of the electric energy meter; it cannot effectively simulate the harmonic conditions in the actual operation of the power grid and the temperature and humidity changes of the electric energy meter in the actual working environment, and cannot realize dynamic harmonic Accurate measurement of energy meter measurement errors under the influence of temperature and humidity changes
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[0055] A device for evaluating the influence of dynamic harmonics and temperature changes on the error of an electric energy meter. The human-computer interaction module is connected to the harmonic source and the A / D sampling module through the RS-485 interface, and has the functions of controlling the harmonic source and processing sampling data function; the harmonic source is connected with the standard meter and the tested meter, and the generated harmonic voltage and harmonic current are respectively input into the standard meter and the tested meter, and the output terminals of the voltage source, the yellow, green and red terminals are respectively It is the positive terminal of voltage output of phase A, phase B and phase C, the black terminal is the common terminal, the output terminal of the current source, the yellow, green and red terminals are the positive terminals of the current output of phase A, phase B and phase C respectively, and the black terminals are resp...
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The invention provides a device and method for assessing influences, on errors of electric energy meters, of dynamic harmonic waves and temperature changes. The device comprises a standard meter, a detected meter, a man-machine interaction module and a harmonic source, wherein the harmonic source is connected with each of the standard meter and the detected meter; the standard meter and the detected meter are respectively connected with an AD sampling module; the AD sampling module is connected with the man-machine interaction module; the man-machine interaction module is used for controllingthe harmonic source to generate harmonic waves which satisfy the test demands, and the harmonic waves are respectively transported to the standard meter and the detected meter placed in a controllableconstant temperature and humidity chamber; and the AD sampling module is used for sampling the standard meter and the detected meter and uploading the sampled data to the man-machine interaction module for processing, and the processing result is displayed on a screen of the man-machine interaction module. According to the device and method, the harmonic conditions in practical operation of powergrids and the changes of temperatures and humidity of electric energy meters in practical working environment can be effectively simulated, so that the correct assessment for the metering errors of the electric energy meter is realized.
Description
technical field [0001] The invention relates to the field of electrical measurement, in particular to a device and method for evaluating the influence of dynamic harmonics and temperature changes on the error of an electric energy meter. Background technique [0002] With the rapid development of the power system, the scale of the power system is getting larger and larger, and the operating environment is becoming more and more complex. Various nonlinear electrical equipment, transformers and various core reactors are harmonic sources in the power grid. With the increase of the capacity of various harmonic sources, more and more attention has been paid to the influence of harmonics on electric energy metering. At present, my country's electric energy meter standard GB / T17215 stipulates the method and requirements for the test of the harmonic influence of the electric energy meter, but the proposed harmonic test waveform cannot fully reflect the actual on-site operating condi...
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Login to View More IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 张俊玮温和张秋雁王泽贤欧家祥丁超张博古庭赟牛唯吴冕之朱亮唐立军邓高峰安甦叶航超孙航
Owner GUIZHOU POWER GRID CO LTD