The Research Of Broadband Phasor Measuring Technology

On basis of absorbing and referring to the foreign and domestic the measurement of phasor technology,this paper deeply introduces the principle of the measurement of phasor, and analyzes the important problems in the design such as reach the goals of frequency conversion,design of broadband analog signal conditioning circuit,design of high-speed data acquisition,thorough exposition on the kind of error and source,and gives good ideals to resolve these problems.This paper accomplished conceptual design about broadband phasor measuring and design of main circuit。It accepted sinusoidal AC signal which frequency range in 1Hz～10MH, resolution of phase about 0.01°. It is characterized in that:reach the goals of frequency conversion is by means of beat frequency transformations,which high frequency signal is transformed of lmflow and medium frequency before phase is measured in digital method;Using a high cost-effective of high speed analog switch as signal source generator,optimizes design of circuit,moreover,cuts down the price;By the method of TDMS (time division multi-channel sampling),thereal time sampling rate reaches 100MSPS;Using a high speed and capacity FPGA(EP2C5Q208)belongs Cyclone II series in the company of ALTERA,it transmits data at high speed and complex logistic control; Using the multiplyperiodic frequency measurement in a synchronous manner.The content of this paper has some important reference value how to achieve phasor measuring in broadband and the design of gnal source generator.