KR960035701A - Fault Detection Method Using Phaser High Speed Operation of Digital Selective Ground Relay - Google Patents

Fault Detection Method Using Phaser High Speed Operation of Digital Selective Ground Relay Download PDF

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Publication number
KR960035701A
KR960035701A KR1019950005346A KR19950005346A KR960035701A KR 960035701 A KR960035701 A KR 960035701A KR 1019950005346 A KR1019950005346 A KR 1019950005346A KR 19950005346 A KR19950005346 A KR 19950005346A KR 960035701 A KR960035701 A KR 960035701A
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KR
South Korea
Prior art keywords
phaser
high speed
selective ground
digital
ground relay
Prior art date
Application number
KR1019950005346A
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Korean (ko)
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KR0146091B1 (en
Inventor
김영돈
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이희종
엘지산전 주식회사
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Priority to KR1019950005346A priority Critical patent/KR0146091B1/en
Publication of KR960035701A publication Critical patent/KR960035701A/en
Application granted granted Critical
Publication of KR0146091B1 publication Critical patent/KR0146091B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Radio Relay Systems (AREA)

Abstract

본 발명은 디지탈형 선택지락 계전기의 페이저 고속 연산방법에 관한 것으로, 종래에는 디지탈형 선택지락 계전기의 경우에도 영상전압 및 영상전류의 페이저를 계산할 때 비재귀적 DFT를 이용한다면 곱셈 및 덧셈 연산이 많아 연산시간이 길어져 최종에는 계전기 동작판단에 지연을 줄 뿐만 아니라 신호처리전용소자(DSP)를 사용하지 않고 일반이 마이크로프로세서를 쓸 경우에는 때에 따라 연산에 있어 한계에 부딪히게 될 수도 있는 문제점이 있다. 따라서, 본 발명은 입력신호를 처리하는 방법에 있어 페이저 계산에 이용되는 신호처리방법을 재귀적 DFT를 이용하여 페이저를 연산하도록 하여 보다 적은 연산으로 빠르게 계산할 수 있도록 하여 고속처리가 가능하도록 한다.The present invention relates to a high speed pager calculation method of a digital selective ground relay. In the conventional case of a digital selective ground relay, a multiplication and an addition operation are required if a nonrecursive DFT is used to calculate a phaser of an image voltage and an image current. As a result of the long time, not only does it delay the relay operation decision, but also when a general microprocessor is used without using a signal processing device (DSP), there is a problem that the operation may sometimes encounter limitations. Accordingly, the present invention enables the high speed processing by performing the signal processing method used for the pager calculation in the method of processing the input signal using a recursive DFT to calculate the pager faster with fewer operations.

Description

디지탈형 선택지락 계전기의 페이저 고속 연산을 이용한 고장판별방법Fault Detection Method Using Phaser High Speed Operation of Digital Selective Ground Relay

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제5도는 본 발명 디지탈형 선택지락 계전기의 페이저 고속 연산방법에 대한 동작흐름도. 제6도는 본 발명 디지탈형 선택지락 계전기의 위상 동작특성도.5 is a flowchart illustrating a method for calculating a pager high speed of a digital selective ground relay according to the present invention. 6 is a phase operation characteristic diagram of the digital selective ground relay of the present invention.

Claims (1)

아날로그/디지탈변환된 형상전압과 영상전류에 대한 디지탈값들을 수집하는 제1단계와, 상기 제1단계에서 수집된 디지탈값을 가지고 재귀적 DFT에 의한 영상전압과 영상전류의 페이저를 계산하는 제2단계와, 상기 제2단계에서 구한 영상전압과 영상전류에 대한 기본파의 페이저를 계산하는 제3단계와, 상기 제2단계에서 구한 페이저가 제3단계에서 구한 기본파의 페이저보다 작으면 제1단계를 수행하고 크면 영상전압 페이저와 영상전류 페이저의 위상차를 계산하는 제4단계와, 상기 단계에서 구한 디지탈값과 위상차를 이용하여 동작위상을 판별하는 제5단계와, 상기 제5단계에서 구한 동작위상판별값이 0보다 크면 동작가능하고 작으면 고장으로 판별하는 제6단계로 이루어진 것을 특징으로 하는 디지탈형선택지락 계전기의 페이저고속연산방법.A first step of collecting digital values for the analog / digital transformed shape voltage and the image current, and a second step of calculating the phaser of the image voltage and the image current by the recursive DFT with the digital values collected in the first step. And a third step of calculating the phaser of the fundamental wave for the image voltage and the image current obtained in the second step; and if the phaser obtained in the second step is smaller than the phaser of the fundamental wave obtained in the third step, A fourth step of calculating a phase difference between the image voltage phaser and the image current phaser if the step is large and a fifth step of determining an operation phase by using the digital value and the phase difference obtained in the step; and the operation obtained in the fifth step. A phaser high speed operation method of a digital selective ground relay, comprising: a sixth step of determining if a phase discrimination value is greater than 0 and operating as a phase discrimination. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950005346A 1995-03-15 1995-03-15 Digital selection ground relay KR0146091B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950005346A KR0146091B1 (en) 1995-03-15 1995-03-15 Digital selection ground relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950005346A KR0146091B1 (en) 1995-03-15 1995-03-15 Digital selection ground relay

Publications (2)

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KR960035701A true KR960035701A (en) 1996-10-24
KR0146091B1 KR0146091B1 (en) 1998-10-01

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KR1019950005346A KR0146091B1 (en) 1995-03-15 1995-03-15 Digital selection ground relay

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957565B1 (en) * 2007-12-28 2010-05-11 주식회사 효성 Operation method for algorithms of protecting relay in electric power system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100403870B1 (en) * 2001-10-09 2003-11-03 명지대학교 Method for measuring fundamental frequency component of fault current or voltage signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957565B1 (en) * 2007-12-28 2010-05-11 주식회사 효성 Operation method for algorithms of protecting relay in electric power system

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Publication number Publication date
KR0146091B1 (en) 1998-10-01

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