IEC62056-standard-based three-phase harmonic fiber electric energy meter

Abstract

The invention relates to the technical field of electric power measurement, particularly to a an IEC62056-standard-based three-phase harmonic fiber electric energy meter comprising a signal acquisition module, a digital signal processing module, an MCU management unit, a communication module, and a power supply module. A signal output terminal of the signal acquisition module is connected with a signal input terminal of the digital signal processing module electrically; a signal output terminal of the digital signal processing module is connected with a signal input terminal of the MCU management unit electrically; and a signal output terminal of the MCU management unit is connected with a signal input terminal of the communication module electrically. According to the invention, the electric energy meter with a reasonable and compact structure can be used conveniently; information including forward and inverse fundamental harmonic waves, phase-splitting, phase-jointing, active and reactive powers, and all phases of harmonic signal amplitude, frequency and phase difference and the like can be measured; and various events can be recorded. The information and events can be stored and displayed. Bidirectional communication between the three-phase harmonic fiber electric energy meter and the information centralization center is realized based on the IEC62056-standard-based communication module, thereby realizing bidirectional and interactive metering with the main information station.

Description

technical field [0001] The invention relates to the technical field of electric power metering, and is a three-phase harmonic optical fiber electric energy meter based on the IEC62056 standard. Background technique [0002] In recent years, with the growth of my country's economy, a large number of civilian electrical equipment and large-scale industrial electrical equipment have been used, which has brought a lot of pollution to the power grid. The harmonic part introduced into the power grid has become an important parameter that cannot be ignored for evaluating the quality of the power grid and for measuring electric energy. Conventional energy metering chips used in traditional methods are difficult to meet today's needs in terms of sampling rate, computing speed, and accuracy. At the same time, algorithms for three-phase electrical harmonic signals are emerging in an endless stream, with higher accuracy and embedded algorithms that are easier to implement, and are more...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a three-phase harmonic fiber-optic electric energy meter based on the IEC62056 standard, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problem that the existing electric energy metering chip is difficult to meet the demand in terms of sampling rate, operation speed, and accuracy. Problems, and the RS485 field wiring in the existing transmission method is relatively complicated, the information transmission accuracy of the PLC method is poor due to reasons such as high attenuation, low impedance, and harmonic interference, and the wireless communication transmission rate is generally slow

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