Research Of The Electric Parameter Detection System Based On DSP

In recent years, with the wide application of various kinds of electric and electronic convertors and other non-linear load, this can make the voltage and current waveform distort and result in the serious depravation of power quality. At the meantime, the microelectronic technology development causes each kind of automated equipment widespread application, enormously enhanced the social productive forces. These installments are extremely sensitive to the electrical energy drop in quality, so many serious accidents happen in the production process and has created massive loss. On the one hand, the quality of electric power has declined, on the other hand the user is required to improve the quality of electricity, and the contradictions are becoming increasingly acute. To enhance the quality of electrical energy, first of all the testing and analysis of electrical parameters must be accurate and complete.Traditional measurement system currently used in electricity meters can not meet the real-time and substantial data-processing requirements. So this system is developed in this situation. The digital signal processor TMS320LF2407A is used for this system,it can realize real time measurement to some base parameter of three -phase voltage,three -phase current and power etc, meanwhile,it has the function of harmonic analysis. The system can collect voltage and circuit of the electric grid real time. In this paper, the technology of alternating current sampling is proposed. It can realize real time measurement of various electric parameter. This system can proess of data according to the FFT algorithm of DSP chip. It displays three-phrase voltage's average and three-phase current's average, power, harmonic, three-phase voltage and current waveform by LCD.Meanwhile,the system has the function of transfer data, it is convenience for the data further analysis, the statistics and the memory. It can provide the long-term effective basis for the electric power department's safety in production.The practice indicated that the system has very high survey speed and the measuring accuracy, friendly interface, easy to operate, complete function, convenient extension, it can also used for other parameter examinations. So it has the very broad application prospect and the practical value.