Positive sequence voltage memory filter for numerical digital relaying applications

A positive sequence voltage memory filter for numerical digital relaying applications is proposed. It is designed based on converting an analogue first-order lowpass filter into an infinite impulse response digital filter using the backward difference method. Its combination with both recursive and...

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Published in:Electronics letters 2015-10, Vol.51 (21), p.1697-1699
Main Authors: Silva, K.M, Almeida, M.L.S
Format: Article
Language:English
Subjects:
analogue first‐order lowpass filter
backward difference method
Decay
Digital
Electric potential
filter transient response
IIR filters
infinite impulse response digital filter
Low pass filters
Mathematical models
nonrecursive phasor estimation algorithms
numerical digital relaying applications
numerical relay
Phasors
positive sequence voltage memory filter
positive sequence voltage memory polarisation
Power electronics, energy conversion and sustainability
power harmonic filters
power system faults
power system harmonics
power system interconnection
power system protection
recursive estimation
Relaying
Voltage
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description A positive sequence voltage memory filter for numerical digital relaying applications is proposed. It is designed based on converting an analogue first-order lowpass filter into an infinite impulse response digital filter using the backward difference method. Its combination with both recursive and non-recursive phasor estimation algorithms is discussed. The obtained results reveal the decaying time constant of the proposed filter transient response is easily set, providing a simple and stable mean to adaptively adjust the positive sequence voltage memory polarisation of numerical relays.
doi_str_mv 10.1049/el.2015.1586
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subjects analogue first‐order lowpass filter
backward difference method
Decay
Digital
Electric potential
filter transient response
IIR filters
infinite impulse response digital filter
Low pass filters
Mathematical models
nonrecursive phasor estimation algorithms
numerical digital relaying applications
numerical relay
Phasors
positive sequence voltage memory filter
positive sequence voltage memory polarisation
Power electronics, energy conversion and sustainability
power harmonic filters
power system faults
power system harmonics
power system interconnection
power system protection
recursive estimation
Relaying
Voltage
title Positive sequence voltage memory filter for numerical digital relaying applications
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