METHOD OF DESIGNING A DIGITAL INTEGRATED CIRCUIT FOR A MULTI-FUNCTIONAL DIGITAL PROTECTIVE RELAY

摘要

This invention relates to a method of designing a digital integrated circuit for a multi-functional digital protective relay, emphasizing a digital module part, and input voltage and current signals are processed by a digital signal processor module to calculate the fundamental wave of the input voltage and current of protective relay, prevent the harmonic components in the input voltage or current from affecting the protective relay in operation; calculate for a root mean square value of voltage and current, being offered to a protective module next to determine a precise value, and the result is sent to the over voltage, under voltage, over current, and under current protective relay, the DSP using a pipeline-based structure, frequency-division fast Fourier transformation, and matrix spin digital algorithm to speed up the operation and reduce the occupied hardware area, which is a design for calculation and protection of the multi-functional digital protective relay.