Electric energy measuring error estimation method

An error estimation and electric energy measurement technology, applied in the field of electric energy measurement error analysis, can solve the problems of inability to meet the needs of refined management, inability to realize verification and monitoring, etc., to achieve the effect of improving prediction accuracy and calculation speed, and reducing the difficulty of prediction

Active Publication Date: 2018-12-21
GUANGDONG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for estimating electric energy measurement errors in order to overcome the technical defects that the existing electric energy measurement error estimation method cannot realize real-time on-line verification and monitoring, and cannot meet the requirements of fine management

Method used

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  • Electric energy measuring error estimation method
  • Electric energy measuring error estimation method

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Embodiment 1

[0056] The voltage data and measurement error of the electric energy metering device for 10 hours are selected as the research object. Record the voltage data measured at the same access point at the same time and the voltage data measured by higher-precision metering devices. The collection frequency is once every 3 seconds, with a total of 7200 observation points. The voltage measurement error of the device is shown in the following formula:

[0057] e=y' i -y i ;

[0058] the y i is the true value of the voltage; y′ i It is the voltage value measured by the electric energy metering device; the chip used in the metering of the electric energy metering device is ADE7880.

[0059] Preprocess the measured error data to obtain the measurement error sequence, use the wavelet transform to process the measurement error sequence, and obtain a set of error sequence components, and consider the cumulative error that may occur when the new error prediction result is used as the in...

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Abstract

The invention relates to an electric energy measuring error estimation method. The method comprises the following steps: preprocessing metering data measured by an electric energy metering device to obtain a metering error sequence; performing wavelet conversion decomposition on the metering error sequence to obtain multiple groups of error sequence components; constructing a robust extreme learning machine model, regarding each group of error sequence component and the measured metering data as the input quantity to add in the robust extreme learning machine model as the input quantity, thereby obtaining an error prediction value of each group of error sequence component; adding the obtained error prediction values to predict the next generation of error value; preprocessing the error value to obtain the new metering error sequence, updating the measured metering data, performing iterative updating and cyclically predicting. Through the electric energy metering error estimation methodprovided by the invention, the rule in the original signal is extracted through the application of the wavelet conversion decomposition and the robust extreme learning machine model, the prediction difficulty is greatly reduced, the prediction precision and operation speed under the existence of the noise condition are improved.

Description

technical field [0001] The present invention relates to the technical field of electric energy measurement error analysis, and more specifically, relates to an electric energy measurement error estimation method. Background technique [0002] In the electricity market, the readings of electric energy metering devices are used as the basis for transaction settlement, and its importance is gradually increasing for both parties to the transaction. In the process of using the electric energy metering device, the power supply company has also changed its function from self-clearing to transaction clearing, which puts forward stricter requirements on the accuracy of electric energy metering. [0003] The on-site verification of traditional electric energy metering devices is to calibrate its metering chip under actual operating conditions, calculate the value of each register through the error algorithm, and complete the error verification. This method actually regards the meterin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 林哲昊彭显刚
Owner GUANGDONG UNIV OF TECH
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