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Harmonic electric energy metering error analytical apparatus

A technology of error analysis and electric energy metering, which is applied in the directions of measuring devices, measuring electric variables, spectrum analysis/Fourier analysis, etc., can solve the problem of not being able to provide real-time analysis of harmonic electric energy metering errors, etc.

Inactive Publication Date: 2009-05-27
WUHAN UNIV
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Problems solved by technology

However, none of these studies can provide an effective means for real-time analysis of harmonic energy measurement errors.

Method used

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  • Harmonic electric energy metering error analytical apparatus
  • Harmonic electric energy metering error analytical apparatus
  • Harmonic electric energy metering error analytical apparatus

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Experimental program
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Embodiment approach

[0056] Because different types of electric energy meters have different performances due to the structure and other relations, the performance of the model function is different. During specific implementation, the model of the electric energy meter and the corresponding model function can be pre-stored into the model storage module by the manufacturer of the harmonic electric energy metering error analysis device, or can be selected and input by the customer according to the model of the electric energy meter used by the power grid as meter data. The model function can be obtained by experiment, and the present invention can realize the acquisition conveniently and accurately by adopting a real-time simulation system (RTDS). In order to facilitate implementation, the present invention provides further technical solutions, and the embodiments are as follows:

[0057] Create a simulation model in RTDS, see attached image 3 , the simulation model includes a three-phase AC powe...

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Abstract

A harmonic energy metering error analytic device comprises a harmonic data collection part used for inputting the harmonic data collected by power network into an electric energy data analytic part, an electric energy metering error data analytic part comprising a model storage module and an error analysis module and an error analytic result output part used for outputting or storing the error data analytic result acquired from the electric energy metering error data analytic part; wherein the model storage module is used for storing metering error models and model functions corresponding to the models of electric energy meters; the error analysis module is used for deriving the theoretical error data to be analyzed of the input harmonic data and deriving the error of each harmonic measurement and the total error. The harmonic energy metering error analytic device can provide quantitative data basis for power supply department to retrieve electric energy metering error loss and control harmonic pollution.

Description

technical field [0001] The invention belongs to the field of harmonic electric energy metering in electric power systems, and in particular relates to an error analysis device for harmonic electric energy metering. Background technique [0002] With the development of modern industry, the nonlinear load in the power grid has increased greatly, and the pollution of harmonics to the power grid has become more and more serious. Harmonic pollution distorts the power supply voltage and current waveform of the power grid, seriously affecting the power quality. Harmonics will cause electrical equipment to overheat, increase vibration and noise, accelerate insulation aging, shorten service life, and even break down or burn out; it will also have a serious impact on other devices or equipment in the power system such as relay protection. In addition, harmonics have a serious impact on the correct measurement of electric energy metering devices, causing huge economic losses to the po...

Claims

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Application Information

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IPC IPC(8): G01R22/06G01R23/16
Inventor 向铁元张冯硕阳龙张继新胡威
Owner WUHAN UNIV
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