Dsp Ftu Power Collection

FTU based on the SCM (Single Chip Micyoco) can hardly ensure the reliability and operation precision of distribution automation system, but FTU based on DSP+MCU can do this. With the characteristic of being good at dealing with complicated and a large number of data, DSP can sample and calculate the data such as voltage, current, active power, reactive power, then MCU accomplish the analysis and corresponding reaction, the control logic time sequence of dual CPU is controlled by CPLD.,the data exchange of dual CPU can be realized by sharing dual port RAM .In this thesis the implementation of hardware and software of FTU based on DSP is discussed. The characteristic, interface circuit and the principle of every element of the sampling part is analyzed in detail, then the flow chart and the implementation of the sampling and analyzing part then is studied. The simulation of the normal and the familiar fault instance of the power system can illustrate it correct and effective. Finally, an improved algorithm for fractional harmonic analysis is used to reduce the leakage, the result of the simulation shows it can heighten the precision of the measure of the parameter.