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Digital input filters for measurement, control and protection of electric power systems
Author(s) -
Kido Mitsuyasu,
Chiba Tomio,
Kudo Hiroyuki,
Kawakami Junzou,
Kawai Tadao
Publication year - 1992
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391120510
Subject(s) - digital signal processing , electronic engineering , bandwidth (computing) , digital signal processor , sampling (signal processing) , computer science , digital filter , electric power system , reliability (semiconductor) , engineering , digital control , digital signal , signal (programming language) , digital delay line , power (physics) , filter (signal processing) , electrical engineering , telecommunications , physics , quantum mechanics , programming language
Power system control and protection equipment has required higher sensitivity and operational reliability than conventional one. Studies of digital signal processing suitable for electric power systems fulfill this objective using fast sampling and digital filtering by a 32‐bit floating point DSP (Digital Signal Processor). The sampling rate of 3 kHz is carefully selected in order to separate the power spectrums of the A‐D conversion output errors from the signal bandwidth. The new 12‐bit A‐D conversion unit equipped with a recursive‐type digital filter achieved the equivalent high resolution of 14‐bit conversion. This paper describes the design concept and the characteristics showing applications to current differential relays, distance relays and power system controllers.