Device and method for processing input data of protective relay
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United States of America Patent
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Apr 29, 2014
Grant Date -
Jul 28, 2011
app pub date -
Jan 25, 2011
filing date -
Jan 27, 2010
priority date (Note) -
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Abstract
A device and a method for processing an input data of an protective relay, even in case that data stored in an accumulation buffer of the protective relay is damaged due to noises, etc., that can recover it and carry out a normal measurement are provided, the invention includes a digital signal processing part comprising inputting a sampled digital data to a digital signal processing part, counting and accumulating frequency of the inputted data, comparing the accumulated value with a value of a period, inputting a value of an update accumulation buffer to a measurement accumulation buffer and initializing the update accumulation buffer if the counted accumulation frequency is equal to the value of one period; and performing an RDFT (Recursive Discrete Fourier Transform) operation on the inputted digital data to dually buffering the measurement accumulation buffer and the update accumulation buffer.
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