Title :
Development of custom LSIs for protective relays and their evolution to new static relays
Author :
Chiba, Tomio ; Kudo, Hiroyuki ; Watanabe, Atsumi ; Goto, Masuo ; Kido, Mitsuyasu ; Seo, Kazuo
Author_Institution :
Hitachi Ltd., Tokyo, Japan
fDate :
1/1/1988 12:00:00 AM
Abstract :
A relay LSI and a filter LSI are developed for static distance relays. The relay LSI is based on the phase-comparison scheme and applicable to a reactance relay, a mho relay, an offset mho relay, and an ohm relay. Key technologies used to meet the relay requirements are CMOS switched-capacitor technologies. Circuit compositions and characteristic test results are described. A prototype relay unit demonstrated superiority to a conventional unit in terms of its compactness. High reliability (because of the small number of parts), high accuracy, and very low power dissipation
Keywords :
CMOS integrated circuits; large scale integration; relay protection; CMOS switched-capacitor technologies; accuracy; characteristic test results; circuit compositions; compactness; custom LSI; filter LSI; low power dissipation; mho relay; offset mho relay; ohm relay; phase-comparison scheme; protective relays; reactance relay; relay LSI; reliability; small number of parts; static distance relays; static relays; CMOS technology; Capacitors; Circuit testing; Digital relays; Electrical fault detection; Filters; Large scale integration; Power dissipation; Power system relaying; Protection; Protective relaying; Prototypes; Relays;
Journal_Title :
Power Delivery, IEEE Transactions on
