A method for evaluating the measurement accuracy of electric energy meters based on multidimensional influence quantities

Abstract

The invention provides a multi-dimensional influence quantity-based electric energy meter metering accuracy evaluation method. The method comprises the following steps of designing a model topological structure and an initialization model; obtaining the data samples of historical tests on an electric energy meter; calculating the output of a neuron in the input layer of the model; calculating the output of a neuron in the hidden layer of the model; calculating the output of a neuron in the output layer of the model; calculating the evaluation deviation value of a model network relative to a sample set to obtain the standard deviation STDEV; adjusting the parameters of internal neurons of the model till meeting the precision requirement; establishing a metering performance model of the electric energy meter under the effect of multi-dimensional influence quantities; acquiring the data of the multi-dimensional influence quantities at an actual site; and evaluating the metering accuracy of the electric energy meter under the effect of multi-dimensional influence quantities. According to the technical scheme of the invention, no additional test is required for testing the electric energy meter. Meanwhile, the data of historical tests on the electric energy meter are further excavated and utilized, and the metering accuracy of the electric energy meter under the effect of multi-dimensional influence quantities is evaluated accurately.

Description

technical field [0001] The invention relates to a method in the field of electricity service in the electrical instrumentation industry, in particular to a method for evaluating the measurement accuracy of electric energy meters based on multidimensional influence quantities. Background technique [0002] Electric energy is an important energy in human life. The amount of electric energy supply and consumption needs to be realized through electric energy metering. The result of electric energy metering is the basis for the settlement of the two parties of electric energy. The accuracy of electric energy metering is related to the economic benefits of both power supply and demand. [0003] As one of the measuring instruments under the national compulsory verification management, the electric energy meter must pass a series of tests such as strict accuracy requirements test, electrical requirements test, electromagnetic compatibility test, etc. before installation, and can be p...

AI Technical Summary

Problems solved by technology

At present, the verification and testing of electric energy meters are carried out under the reference conditions set by the laboratory, and the amount of interference imposed is usually single-dimensional

However, due to my country's vast territory, complex and diverse climate and terrain, and the different operating environments of power grids in various regions, the on-site operating conditions of electric energy meters are extremely complicated. There are often situations where multiple interference quantities deviate from the reference conditions at the same time, and it is difficult to ensure the on-site operation of electric energy meters. The working conditions are consistent with the laboratory test environment, resulting in deviations between the metering performance of the energy meter in the actual grid operating environment and the laboratory verification results

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