Title :
A digital-analog mixed-voltage crossing point precision detection method
Author_Institution :
Dept. of Electr. Eng., Rizhao Senior Tech. Schools, Rizhao, China
Abstract :
The digital - analog hybrid device is used to achieve the high-precision detection of the grid voltage based on the algorithm of biquadrate Butterworth band pass filter which is achieved by the digital algorithm based on MSP430F169 MCU. Then the fact influencing the filter performance is analyzed by the different quality factor Q. And a voltage zero-crossing modified algorithm is realized by the grid frequency fluctuation based on the phase compensation method. The effect of frequency fluctuation on the output phase is eliminated by the phase feed-forward compensation. The sampling error of the digital algorithm is compensated by the circuit of RC analog filter.
Keywords :
Butterworth filters; Q-factor; band-pass filters; biquadratic filters; compensation; microcontrollers; MSP430F169 MCU; Q factor; RC analog filter circuit; biquadrate Butterworth band pass filter algorithm; digital-analog mixed-voltage crossing point precision detection method; grid frequency fluctuation effect; grid voltage detection; phase feedforward compensation method; quality factor; sampling error; voltage zero-crossing modified algorithm; Band pass filters; Digital filters; Filtering algorithms; Low pass filters; Power harmonic filters; Q factor; Butterworth Filter; Digital-Analog Algorithm; Zero-Crossing Detection;
Conference_Titel :
Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC), 2011 2nd International Conference on
Conference_Location :
Deng Leng
Print_ISBN :
978-1-4577-0535-9
DOI :
10.1109/AIMSEC.2011.6009944
