Intelligent electric energy meter measurement error analysis method, metering device and intelligent electric energy meter

Abstract

The invention relates to an intelligent electric energy meter measurement error analysis method, a metering device and an intelligent electric energy meter. The method comprises the following steps of: obtaining harmonic parameters of sampling signals in a sampling circuit and temperature parameters corresponding to the sampling circuit after obtaining a voltage sampling value and a current sampling value in a power grid line by utilizing the sampling circuit; correcting the voltage sampling value and the current sampling value based on the harmonic parameters and the temperature parameters; and generating a measurement value based on the corrected voltage sampling value and the current sampling value. According to the invention, the influence of various harmonics and environmental factorson the accuracy of the measurement value is eliminated, and the accuracy of the measurement value of the intelligent electric energy meter is improved.

Description

technical field [0001] The invention belongs to the technical field of power grids, and in particular relates to a measurement method for an intelligent electric energy meter, in particular to a measurement error analysis method for an intelligent electric energy meter, a measuring device and an intelligent electric energy meter. Background technique [0002] With the continuous development of the smart grid, the characteristics of high integration of power flow, information flow and business flow in the power grid are becoming more and more prominent. As a key component of the smart grid, the smart energy meter acts as a bridge between the power sales department and the user, and provides the final basis for the economic settlement of both the power supply and the electricity consumer. Therefore, the measurement accuracy of the smart energy meter is directly related to the economic interests of both parties. and mutual trust. Among them, the harmonic signal in the grid lin...

AI Technical Summary

Problems solved by technology

In the existing measurement error analysis scheme, the analysis of the measurement error of the electric energy meter caused by the harmonic current is carried out at a constant temperature, and does not involve the influence of the harmonic current on the measurement accuracy of the electric energy meter under the condition of temperature change

[0004] In recent years, a large number of power electronic devices have been connected to the grid, resulting in a large number of harmonics in the grid current. At the same time, the temperature difference between the four seasons in some areas of our country is relatively large. When the smart energy meter operates in such a complex environment, there are a large number of direct influences on the smart energy meter. The electronic components of the measurement accuracy of the electric energy meter, and the performance of these electronic components are often affected by various factors, which will cause the smart electric energy meter to adopt the existing measurement scheme in a complex environment, making the measurement results less accurate In this case, it may even be misjudged that there is a fault in the electric energy meter, which will increase the workload of repairing and replacing the electric energy meter.

Images