Premium
Digital input filters for measurement, control and protection in electric power systems
Author(s) -
Kido Mitsuyasu,
Chiba Tomio,
Kudou Hiroyuki,
Kawakami Junzou,
Kawai Tadao
Publication year - 1993
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.4391130203
Subject(s) - digital signal processing , electronic engineering , bandwidth (computing) , computer science , sampling (signal processing) , digital filter , reliability (semiconductor) , electric power system , digital signal processor , digital control , digital delay line , engineering , digital signal , power (physics) , filter (signal processing) , electrical engineering , telecommunications , physics , quantum mechanics
Power system control and protection equipment is subject to especially stringent sensitivity and operational reliability requirements. Projected digital signal processing systems suitable for electric power systems fulfill these requirements by means of 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 spectra 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 a high resolution equivalent to 14‐bit conversion. This paper describes the design concept and the operating characteristics and illustrates applications to current differential relays, distance relays and power system controllers.