Three-phase multifunctional electric energy meter based on high-grade dual-AVR single-chip microcomputer

The utility model discloses a three-phase multifunctional electric energy meter based on a high-grade dual-AVR single-chip microcomputer. It dual-AVR single-chip microcomputer core processing unit comprises a No. 1 AVR single-chip microcomputer and a No.2 AVR single-chip microcomputer which are connected with each other through a SPI bus system unit. A front-end signal conditioning unit and a high-precision ADC conversion unit are respectively connected with the No.1 AVR single-chip microcomputer. The front-end signal conditioning unit is also connected with the high-precision ADC conversion unit. A function display operating unit, a SD card memory cell and a Zigbee wireless communication unit are respectively connected with the No.2 AVR single-chip microcomputer. The front-end signal conditioning unit is connected with a user line to be measured. According to the utility model, conventional electrical parameters such as three-phase voltage, current, frequency, active and reactive power and the like can be monitored and displayed at real time. The three-phase multifunctional electric energy meter provided by the utility model has advantages of simple operation, portable type, low cost, strong intelligence, high measurement accuracy, strong anti-jamming capability, high reliability and the like.