Electronic type multifunctional electric energy meter

Abstract

The invention relates to an electronic type multifunctional electric energy meter. A core of hardware is an MCU main controller that is responsible for key input scanning, working state detection, metering data reading in, calculation and storage, on-site configuration of electric meter parameters and control on communication with the external world and the like. Besides, main functional units of the electric energy meter comprise the MCU main control unit, an electric quantity metering module, an RFID communication module, an RS-485 communication module, a calibration module, and an EEPROM storage array; and other auxiliary module consist of a clock calendar circuit, a working abnormity alarm circuit, a key input circuit, a reset control circuit, a power supply module, a large-screen liquid crystal display module and an LED display module. The electric energy meter can simultaneously carry out metering on forward/reverse active electric energy, forward/reverse reactive electric energy, and four-quadrant reactive electric energy; and moreover, the electric energy meter also enables multi-rate control, load curve recording, and voltage losing recording, overvoltage recording, and frequency over-limit recording to be realized.

Description

Technical field: [0001] The invention belongs to the field of electronic equipment, and in particular relates to a three-phase four-wire electronic multifunctional electric energy meter with four tariffs, six load curves and two tariff structures. Background technique: [0002] With the rapid development of my country's economy, the demand for electricity in all walks of life is increasing, and the phenomenon of unbalanced electricity consumption at different times is also becoming more and more serious. In order to alleviate the increasingly sharp contradiction between power supply and demand in my country, adjust the load curve, and improve the phenomenon of unbalanced power consumption, the peak, flat, and valley time-of-use electricity price system will be fully implemented to "cut peaks and fill valleys" to improve the country's power consumption efficiency. Using power resources, the power departments of some provinces and cities in China have gradually introduced multi...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of existing multifunctional electric energy meters such as few types, high prices, imperfect functions, and lack of versatility, the present invention provides an electronic multifunctional electric energy meter, which is an intelligent high-tech electric energy metering product. The meter can simultaneously measure forward / reverse active energy, forward / reverse reactive energy, and four-quadrant reactive energy. LCD display and other functions, the master station can perform operations such as checking, setting, and reading the meter through the RS-485 bus or a handheld RFID meter reading device, which can well meet the needs of industrial users for electric energy meters at this stage

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