Frequency relaying based on instantaneous frequency measurement [power systems]

Author

Moore, P.J. ; Allmeling, J.H. ; Johns, A.T.

Author_Institution

Sch. of Electron. & Electr. Eng., Bath Univ., UK

Volume

11

Issue

4

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1737

Lastpage

1742

Abstract

A frequency relay capable of under/over frequency and rate of change of frequency measurements has been implemented on a digital signal processor using an instantaneous frequency measuring algorithm. Careful attention to the filtering aspects of the relay is needed under dynamic conditions due to frequency modulation of the input signal. An algorithm for avoiding unwanted relay operation due to impulsive changes in the input signal is presented. Results are shown for simulated tests using computer-based relay testing equipment, and for overloads on a micromachine power system simulator

Keywords

automatic test equipment; automatic testing; frequency measurement; power system analysis computing; power system measurement; power system relaying; algorithm; dynamic conditions; filtering aspects; frequency modulation; frequency relay; input signal; instantaneous frequency measurement; micromachine power system simulator; overfrequency measurement; power systems; rate of change of frequency measurement; relay testing equipment; test automation; underfrequency measurement; Computational modeling; Computer simulation; Digital relays; Digital signal processors; Frequency measurement; Power system dynamics; Power system relaying; Power system simulation; Signal processing algorithms; System testing;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.544251

Filename

544251