Multifunctional electric energy meter

Abstract

The invention relates to a single-phase multifunctional electronic time-sharing electricity meter using a Microchip dsPIC30F6014A singlechip as core structure. The electricity meter comprises a power circuit, a sampling circuit, a Chinese LCD display, an electric energy pulse interface and a communication interface. The sampling alternating-voltage, current enter into an AD module in MCU by a mutual inductor and an operation amplifier TLC2264 and the voltage signal enters into the input capturing module of MCU to obtain the sampling frequency at the same time and the accurate electric quantity value is obtained by a 64-point fast Fourier transform, thus the special DSP module of the MCU makes the electricity meter have higher measurement accuracy and operation speed. At the same time, a real-time clock effectively generates the record of the time-interval electric energy and every tariff in each month according to the preset time interval and payment day in each month. The multifunctional electricity meter can record and store the maximum demand of the electric energy, power-off and power-on, energy emptying, system parameter setting or the like, in favor of statistics and power-supplying scheme adjustment of electric energy department and the reasonable arrangement of energy source can be realized.

Description

technical field [0001] The invention relates to a metering electronic instrument, in particular to an electric energy meter. 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-rate multi-functional electric energy meters, and charge users' electricity consumption by time. This kind of energy meter...

AI Technical Summary

Problems solved by technology

[0003] But the fly in the ointment is that many manufacturers develop dedicated integrated single-chip microcomputers by themselves, and the memory and IO port resources are limited, which is very inconvenient for expanding more functions or realizing dot matrix Chinese character display.

And these chips are mostly 8-bit single-chip microcomputers, which affect the program execution speed and efficiency

There are also some electric energy meters that use a separate electric energy metering chip. Although some of the above problems have been overcome, the hardware integration is not high, the peripheral circuit is complex, the energy consumption is large, and the production cost is also increased.

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