Research of AC Parameter Detection System in Power System

This paper has presended the hardware and software design of AC parameter detection system in power system.The synchronizing sampling has been used in the hardware design while the synchronized signal is generated by the phase-lock doubling circuit of 4046;Signal gathering is realized by the transform circuit of mutual inductor and operational amplifier.The AD convention is completed by the chip 12-bit AD574A; The sampled voltage and current data pass on to the supreme position machine through the serial interface RS232.The part of software has realized the function of the electricity parameter analysis and the demonstration,which is taking the sampling data from the lower position machine as the examination object,and carring on the analysis with the digital signal processing technology to the sampling data,and then programming with DELPHI.