Study of high-speed distance relay using microcomputer

Miki, Y.; Sano, Yoshikazu; Makino, Junichi

doi:10.1109/t-pas.1977.32371

Cited by 7 publications

(1 citation statement)

References 5 publications

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“…Some of these have been used [9]. Generally the filters, which are called 'unit filters' (UF), are used as basic filtering units combined serially to meet protective relaying filtering requirements.…”

Section: Unit-combined Digital Filtersmentioning

confidence: 99%

Digital Filtering Methods in Microprocessor Based Protective Relaying

Zhang¹,

Hope

Malik

1990

Electric Machines & Power Systems

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Most protective relaying schemes use single frequency information from transient current/voltage signals to discriminate faults. In microprocessor based protective relaying, digital filtering is an attractive method of extracting effective frequency components. This paper presents three digital filtering methods based on frequencyspectral analysis for microprocessor based protective relaying: unit-combined filters, assigned zero-points filters and narrow band-pass filters. Test results are also presented.

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Section: Unit-combined Digital Filtersmentioning

confidence: 99%

Digital Filtering Methods in Microprocessor Based Protective Relaying

Zhang¹,

Hope

Malik

1990

Electric Machines & Power Systems

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Study of digital‐type current differential relay based on product calculation principle

Makino

Miki

Sano

et al. 1979

Electrical Engineering Japan

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High Speed Digital Directional Comparison Relaying

Prakash

Malik

Hope

1988

Electric Machines & Power Systems

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A high speed directional comparison relay based on the evaluation of the locally measured deviations of the voltage and current from their prefault values is described in this paper. Signal processing techniques are used to damp out the exponentially decaying dc component and high frequency transient components so that the operation of the relay depends on the power frequency components of the voltage and current deviation signals. The direction to a fault is determined by detecting the first transgression of the fault trajectories across threshold boundaries in the deviation plane. Studies on a three phase power system model show that the direction to a fault is determined within a first few milliseconds following the inception of a fiult.

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Study of high-speed distance relay using microcomputer

Cited by 7 publications

References 5 publications

Digital Filtering Methods in Microprocessor Based Protective Relaying

Digital Filtering Methods in Microprocessor Based Protective Relaying

Study of digital‐type current differential relay based on product calculation principle

High Speed Digital Directional Comparison Relaying

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