The Multi-Function Electric Power Meter Based On The DSP

With the development on automation, intelligence and network of the measurement and management in power industry, the new multi-function power meter with high accurate survey function and basic power quality analytic function becomes a necessary foundation. But the current domestic and international power survey instrument industry is lack of the low-cost terminal meter with those two function combined.This paper based on the TI "TMS320F2808" fixed-point DSP platform which has been recognized and widely used, and achieved the traditional meter measurement functions of active power, reactive power, apparent power, power factor through the discrete integral, error compensation, fixed-point decimal calculation method. Meanwhile, it also realized the preliminary analysis functions on electric power quality conditions like the fundamental frequency measurement, harmonic analysis, voltage and current DC component, RMS of voltage and current by the period-measurement method based on the interpolation and zero detected, interpolating windowed Fast Fourier Transform algorithm, and etc.Preliminary experiments show that the system has met the industrial requirements of highly efficiency and low-cost, and prepare the necessary infrastructure for the process of network monitoring and management in the electricity supply and consumption.