KR980003607A - Load unbalance automatic measuring device - Google Patents

Load unbalance automatic measuring device Download PDF

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Publication number
KR980003607A
KR980003607A KR1019960022087A KR19960022087A KR980003607A KR 980003607 A KR980003607 A KR 980003607A KR 1019960022087 A KR1019960022087 A KR 1019960022087A KR 19960022087 A KR19960022087 A KR 19960022087A KR 980003607 A KR980003607 A KR 980003607A
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data
measuring
unit
voltage
unbalance rate
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KR0176063B1 (en
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정재기
심응보
강지원
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이종훈
한국전력공사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/16—Measuring asymmetry of polyphase networks

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

본 발명은 3상 4선식 송전선로에서의 부하 불평형율 자동측정장치에 관한 것으로서, 종래기술에서 부하 불평형으로 인한 선로사고로 인해 기기 고장, 송전 불가능 등의 문제점을 해결하기 위해, 본 발명은 송전선로로부터 입력된 3상 전류 및 전압 신호를 측정하는 데이타 측정부와 그 데이타 측정부에서 측정된 신호들을 부하의 불평형율의 계산을 하기 위한 데이타로 저장시키기 위해 그 데이타를 분석하는 데이타 분석수단과, 데이타 분석부에서 분석되어 저장된 데이타를 읽어 미리 저장해 놓은 프로그램에 따라 부하 불평형율을 연산하는 데이타 연산부과, 데이타 연산부에서 연산된 부하 불평형율의 데이타를 사용자에게 출력해주는 출력부로 구성되어, 자동으로 부하 불평형율을 측정함으로써 송전선로의 사고를 미연에 방지할 수가 있고, 작업상의 간편성과 정확성 및 신뢰성을 제공한다.The present invention relates to an automatic load unbalance rate measuring device in a three-phase four-wire transmission line, in order to solve the problems of equipment failure, power transmission, etc. due to the line accident due to load unbalance in the prior art, the present invention is a transmission line A data measuring unit for measuring a three-phase current and voltage signal input from the data measuring unit, and data analyzing means for analyzing the data to store the signals measured in the data measuring unit as data for calculating the unbalance rate of the load; It consists of a data operation unit that calculates the load unbalance rate according to a program stored in advance by reading and storing the data analyzed by the analysis unit, and an output unit which outputs the data of the load unbalance rate calculated by the data operation unit to the user. By measuring, the accident of transmission line can be prevented beforehand. Its simplicity, accuracy and reliability.

Description

부하 불평형율 자동측정장치Load unbalance automatic measuring device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명이 적용되는 일반적인 3상 4선식 송전방식 회로도.1 is a general three-phase four-wire transmission system circuit to which the present invention is applied.

제2도는 본 발명의 부하 불평형율 자동측정장치의 블럭 구성도.2 is a block diagram of an automatic load unbalance rate measuring device of the present invention.

Claims (7)

3상 4선식 송전선로에 연결된 부하의 불평형율을 측정하는 장치에 있어서, 상기 송전선로로 부터 입력된 3상 전류 및 전압 신호를 측정하는 데이타 측정수단과, 상기 데이타 측정수단에서 측정된 신호들을 부하의 불평형율의 계산을 하기 위한 데이타로 저장시키기 위해 그 데이타를 분석하는 데이타 분석수단과, 상기 데이타 분석수단에서 분석되어 저장된 데이타를 읽어 미리 저장해 놓은 프로그램에 따라 부하 불평형율를 연산하는 데이타 연산수단과, 상기 데이타 연산수단에서 연산된 부하 불평형율의 데이타를 사용자에게 출력해주는 출력수단으로 구성된 것을 특징으로 하는 부하 불평형율 자동측정장치.An apparatus for measuring an unbalance rate of a load connected to a three-phase four-wire transmission line, comprising: data measuring means for measuring three-phase current and voltage signals inputted from the transmission line, and loads the signals measured by the data measuring means A data analyzing means for analyzing the data to store the data for calculating the unbalance rate of the data, a data calculating means for calculating the load unbalance rate according to a program stored in advance by reading the stored data analyzed by the data analyzing means; And an output means for outputting the load unbalance rate data calculated by the data calculation means to a user. 제1항에 있어서, 상기 데이타 측정수단은 송전선로로 부터 입력된 3상의 전류와 중성선의 전류를 측정하는 계기용 변류부와, 이와 동시에 송전선로로 부터 입력된 3상의 전압을 측정하는 계기용 변압부와, 상기 계기용 변류부와 상기 계기용 변압부로 부터 출력된 신호를 일정 전압으로 분압시켜 출력하는 분압부로 구성된 것을 특징으로 하는 부하 불평형율 자동측정장치.According to claim 1, wherein the data measuring means is a current transformer for measuring the current of the three-phase current and the neutral wire input from the transmission line, and at the same time the voltage transformer for measuring the three-phase voltage input from the transmission line And a voltage dividing unit configured to divide the signal output from the instrument current transformer and the voltage transformer unit by a predetermined voltage and output the divided voltage. 제2항에 있어서, 상기 계기용 변류부는 전류신호를 측정하기 위해 2차측에 소정 갯수의 접속단자를 구비한 것을 특징으로 하는 부하 불평형율 자동측정장치.The automatic load unbalance rate measuring device according to claim 2, wherein the current transformer part has a predetermined number of connection terminals on the secondary side for measuring a current signal. 제2항에 있어서, 상기 계기용 변압부는 전압신호를 측정하기 위해 2차측에 소정 갯수의 접속단자를 구비한 것을 특징으로 하는 부하 불평형율 자동측정장치.The apparatus of claim 2, wherein the transformer transformer unit has a predetermined number of connection terminals on a secondary side for measuring a voltage signal. 제1항에 있어서, 상기 데이타 분석수단은 상기 데이타 측정수단에서 출력된 신호들을 저장하기 위해 디지탈 신호로 변환하는 A/D신호변환부와, 상기 A/D신호변환부에서 변환된 디지탈신호의 데이타를 저장하는 데이타 저장부와, 상기 데이타 저장부에 저장된 데이타의 잡음을 제거하고, 그 데이타의 영점 전과 후의 값을 보정하여 상기 데이타 저장부로 출력하는 필터링부와, 상기 데이타 저장부에 저장된 전압과 전류 데이타의 위상차를 비교하고, 그 비교된 결과의 데이타를 상기 데이타 저장부로 출력하는 위상 비교부로 구성된 것을 특징으로 하는 부하 불평형율 자동측정장치.The data analyzing means of claim 1, wherein the data analyzing means comprises: an A / D signal converting unit converting the signals output from the data measuring means into a digital signal, and the digital signal data converted from the A / D signal converting unit. A data storage unit for storing the data, a filtering unit for removing noise of data stored in the data storage unit, correcting values before and after the zero point of the data, and outputting the data to the data storage unit, and a voltage and current stored in the data storage unit. And a phase comparator which compares the phase difference of the data and outputs the data of the compared result to the data storage. 제1항 또는 제5항에 있어서, 상기 위상 비교부는 3상중 어느 하나의 상을 기준으로 나머지 두개의 상이 0이 되는 시간을 측정하여 위상차를 측정하는 것을 특징으로 하는 부하 불평형율 자동측정장치.The apparatus of claim 1 or 5, wherein the phase comparison unit measures a phase difference by measuring a time when the other two phases become zero based on any one of three phases. 제1항에 있어서, 상기 출력수단은 상기 데이타 연산수단에서 계산된 부하 불평형율 데이타를 상기 데이타 저장수단에 기억시키고, 그 데이타의 출력을 제어하는 선택부와, 상기 선택부에 의해 선택된 상기 부하 불평형율 데이타를 표시하는 표시부로 구성된 것을 특징으로 하는 부하 불평형율 자동측정장치.The load unbalance according to claim 1, wherein said output means stores a load unbalance rate data calculated by said data calculating means in said data storage means, and controls the output of said data; An automatic load unbalance rate measuring device, characterized in that the display unit for displaying the rate data. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960022087A 1996-06-18 1996-06-18 Automatic measurement device of load unbalance rate Expired - Fee Related KR0176063B1 (en)

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Application Number Priority Date Filing Date Title
KR1019960022087A KR0176063B1 (en) 1996-06-18 1996-06-18 Automatic measurement device of load unbalance rate

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Application Number Priority Date Filing Date Title
KR1019960022087A KR0176063B1 (en) 1996-06-18 1996-06-18 Automatic measurement device of load unbalance rate

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KR980003607A true KR980003607A (en) 1998-03-30
KR0176063B1 KR0176063B1 (en) 1999-04-01

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