WO2023085485A1 - 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치 - Google Patents
단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치 Download PDFInfo
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- WO2023085485A1 WO2023085485A1 PCT/KR2021/017225 KR2021017225W WO2023085485A1 WO 2023085485 A1 WO2023085485 A1 WO 2023085485A1 KR 2021017225 W KR2021017225 W KR 2021017225W WO 2023085485 A1 WO2023085485 A1 WO 2023085485A1
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- Prior art keywords
- current
- coil
- rogowski
- fault
- fault current
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- 238000005259 measurement Methods 0.000 title claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004804 winding Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
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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
- G01R19/10—Measuring sum, difference or ratio
-
- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
-
- 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
- G01R19/30—Measuring the maximum or the minimum value of current or voltage reached in a time interval
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
Definitions
- the present invention relates to a device for measuring operating current and fault current of a circuit breaker, and more particularly, to measuring the operating current and fault current of a circuit breaker using a Rogowski coil.
- GIS Gas Insulated Switchgear
- An object of the present invention is to provide a circuit breaker operating current and fault current measuring device using a single Rogowski coil that can reduce installation space and manufacturing cost by simultaneously measuring operating current and fault current with a single Rogowski coil.
- Another object of the present invention is to provide a circuit breaker operating current and fault current measuring device using a single Rogowski coil that can simultaneously satisfy the accuracy required for measurement of operating current and fault current with a single Rogowski coil, thereby improving reliability. there is.
- Circuit breaker operating current and fault current measuring device using a single Rogowski coil is based on the voltage generated from a Rogowski coil installed to wrap around a current-carrying conductor and a tap installed on a part of the coil of the Rogowski coil. It includes a protection circuit that outputs a voltage, and a measurement circuit that outputs an operating voltage based on the voltage generated in the entire coil of the Rogowski coil.
- the Rogowski coil passes through a doughnut-shaped air core, a Rogowski inner coil disposed inside the air core at the starting point of the air core as the center line of the air core, and the inside of the air core. It may include a Rogowski outer coil connected to the Rogowski inner coil derived from the end point of the air-core core, wound in a coil shape outside the air-core core and disposed as the starting point of the air-core core.
- the protection circuit may connect the Rogowski external coil located at the starting point to one input and connect a point of a predetermined ratio of the Rogowski external coil connected to the end point to another input.
- the measuring circuit may connect the Rogowski outer coil located at the starting point to one input and connect the Rogowski inner coil located at the starting point to another input.
- a point of a certain ratio connected to the input of the protection circuit may be set as a ratio obtained by dividing ⁇ maximum operating voltage/maximum operating current ⁇ by ⁇ maximum fault voltage/maximum fault current ⁇ .
- the predetermined ratio may be equal to a ratio obtained by dividing the maximum fault current by the maximum operation current when the maximum fault voltage and the maximum operation voltage are constant.
- the maximum fault current may be set to measure a current 2 to 3.4 times greater than the rated fault current.
- the protection circuit and the measurement circuit may be formed of a passive element integrator or an active element integrator.
- the circuit breaker operating current and fault current measuring device using a single Rogowski coil has the advantage of reducing installation space and manufacturing cost by simultaneously measuring operating current and fault current with a single Rogowski coil.
- circuit breaker operating current and fault current measuring device using a single Rogowski coil has the advantage of improving reliability because it can simultaneously satisfy the accuracy required for measurement of operating current and fault current with a single Rogowski coil. .
- FIG. 1 is a schematic configuration diagram showing a circuit breaker operating current and fault current measuring device using a single Rogowski coil according to an embodiment of the present invention.
- FIG. 2 is a view explaining in detail a method of setting a certain ratio of windings for installing taps among the entire length of a Rogowski coil in the present invention.
- FIG. 1 is a schematic configuration diagram showing a circuit breaker operating current and fault current measuring device using a single Rogowski coil according to an embodiment of the present invention
- FIG. 2 is a detailed view for explaining FIG. 1 in detail.
- an apparatus for measuring circuit breaker operating current and fault current using a single Rogowski coil includes a Rogowski coil 100 installed to wrap around a conductor 200 through which current flows,
- the protection circuit 300 outputs the fault voltage (V100) by performing integration based on the voltage generated in a portion of the coil of the Rogowski coil 100, and the integration based on the voltage generated in the entire coil of the Rogowski coil 100.
- It consists of a measuring circuit 400 that outputs the driving voltage (V200) by performing.
- the Rogowski coil 100 is a doughnut-shaped air core 120, a Rogowski internal coil disposed at the center line of the air core 120 inside the air core 120 at the starting point 140 of the air core ( 110), and connected to the Rogowski internal coil 110 derived from the terminal point 150 of the air core 120 through the inside of the air core 120, and wound in a coil shape on the outside of the air core 120, It consists of a Rogowski outer coil 130 disposed as a starting point 140.
- the protection circuit 300 connects the external Rogowski coil 130 located at the starting point 140 of the Rogowski coil 100 as one input, and the logo connected to the end point 150 of the Rogowski coil 100. It is configured to connect a certain ratio of points of the ski outer coil 130 to other inputs.
- the measurement circuit 400 connects the external Rogowski coil 130 located at the starting point 140 of the Rogowski coil 100 as one input, and is located at the starting point 140 of the Rogowski coil 100. It is configured to connect the Rogowski inner coil 110 to another input.
- a tap is installed in a winding of a predetermined ratio of the entire length of the Rogowski coil 100, and through this, a voltage output is obtained in the middle of the Rogowski coil 100.
- the voltage output from the tap installed in the Rogowski coil 100 is determined by the winding ratio of the winding with taps to the total winding of the Rogowski coil 100 .
- the total length of the Rogowski coil 100 is set so that the maximum value of the operating voltage of the measuring circuit 400 can come from the maximum value of the operating current in the conductor 200, and the Rogowski coil 100
- the winding ratio of the winding where the tap is installed to the total winding is set so that the maximum value of the operating voltage of the protection circuit 300 can come from the maximum value of the fault current in the conductor 200.
- the maximum value of the operating voltage of the measuring circuit 400 is output from the measuring circuit 400, it means that the current flowing through the conductor 200 has reached the maximum operating current value, and in the protection circuit 300 If the maximum value of the operating voltage of the protection circuit 300 is output, it means that the current flowing through the conductor 200 has reached the maximum value of the fault current.
- the protection circuit 300 and the measurement circuit 400 integrate and output the current generated in the Rogowski coil 100 and the voltage therefor, and then predict the current flowing through the conductor 200 from the output voltage. do.
- the protection circuit 300 and the measurement circuit 400 may use a passive element integrator or an active element integrator.
- the maximum output voltage may be limited due to the operating voltage of the operational amplifier due to the nature of the operational amplifier, and since there is a lot of noise at a low output voltage, the rated operation is the middle of the operating voltage applied to the operational amplifier. It is suitable for use in the area.
- the circuit breaker operating current and fault current measuring device using a single Rogowski coil can measure the fault current and operating current at the same time using a single Rogowski coil, thereby reducing installation space and manufacturing cost compared to the conventional method.
- FIG. 2 is an I-V (current-voltage) graph showing the fault voltage (V100) and operating voltage (V200) of FIG. 1 in detail.
- V100 fault voltage
- V200 operating voltage
- FIG. 1 A certain ratio of windings, that is, the winding ratio of the winding where the tap is installed to the total winding of the Rogowski coil 100 is ⁇ maximum operating voltage (V220) / maximum operating current (I420) ⁇ ⁇ maximum fault voltage (V120) / maximum It is set by the ratio divided by the fault current (I320) ⁇ .
- the predetermined ratio of the windings is equal to the ratio obtained by dividing the maximum fault current (I320) by the maximum operational current (I420).
- the maximum fault current I320 is set so that a current 2 to 3.4 times greater than the rated fault current I310 can be measured.
- the protection circuit 300 and the measurement circuit 400 can be implemented as a passive element integrator or an active element integrator. do.
- the maximum fault current (I320) is 2.7 times the rated fault current (I310) in order for the rated fault current (I310) to operate in a stable area of the protection circuit (300). and set the maximum fault current (I320) to 2 to 3.4 times the rated fault current (I310) including the margin.
- the maximum operating current (I420) can be set to 6,300 [A], twice the rated operating current (I410), and the rated fault current (I310) is 40
- the maximum fault current (I320) can be set to 108 [kA], which is 2.7 times the rated fault current (I310).
- the current generated in the Rogowski coil 100 is proportional to the number of turns of the Rogowski outer coil 130, and the number of turns of the Rogowski outer coil 130 is the maximum operating voltage (V220) for the maximum operating current (I420). set to output
- the slopes of the fault voltage V100 and the operating voltage V200 may change according to the number of turns of the Rogowski external coil 130. That is, when the number of turns is small, the slope is small, and when the number of turns is large, the slope is large.
- the slope ratio between the fault voltage V100 and the operating voltage V200 is the same as the ratio of the number of turns of the Rogowski external coil 130, and the slope of the operating voltage V200 ⁇ maximum operating voltage V220/maximum operating current (I420) ⁇ and the slope of the fault voltage (V100) ⁇ maximum fault voltage (V120) / maximum fault current (I320) ⁇ , the ratio of the Rogowski external used in the measurement circuit 400 and the protection circuit 300 It becomes the ratio of the number of turns of the coil 130.
- the circuit breaker operating current and fault current measuring device using a single Rogowski coil according to the present invention as described above has a protection circuit 300 and a measuring circuit 400 for ratings of the fault current (I300) and the operating current (I400).
- the circuit breaker operating current and fault current measuring device using a single Rogowski coil has the advantage of reducing installation space and manufacturing cost by simultaneously measuring the operating current and fault current with a single Rogowski coil. It has the advantage of improving reliability because it can simultaneously satisfy the accuracy required for the measurement of operating current and fault current.
- the present invention relates to a device for measuring operating current and fault current of a circuit breaker, and can be used for a circuit breaker current measuring device.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
Claims (8)
- 전류가 흐르는 도체 주위를 감싸도록 설치된 로고스키 코일;상기 로고스키 코일의 코일 일부에 설치된 탭으로부터 발생된 전압을 토대로 사고전압을 출력하는 보호용 회로; 및상기 로고스키 코일의 코일 전체에서 발생된 전압을 토대로 운전전압을 출력하는 측정용 회로;를 포함하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 1항에 있어서,상기 로고스키 코일은,도넛 형태의 공심코어;상기 공심코어의 시작지점에서 상기 공심코어의 내부에 상기 공심코어의 중심선으로 배치되는 로고스키 내부코일; 및상기 공심코어의 내부를 통과하여 상기 공심코어의 종단지점에 도출된 상기 로고스키 내부코일에 연결되고, 상기 공심코어의 외부에 코일 모양으로 감겨 상기 공심코어의 상기 시작지점으로 배치되는 로고스키 외부코일;을 포함하는 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 2항에 있어서,상기 보호용 회로는,상기 시작지점에 위치한 상기 로고스키 외부코일을 하나의 입력으로 연결하고 상기 종단지점으로 연결된 상기 로고스키 외부코일의 일정 비율의 지점을 다른 입력으로 연결하는 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 2항에 있어서,상기 측정용 회로는,상기 시작지점에 위치한 상기 로고스키 외부코일을 하나의 입력으로 연결하고 상기 시작지점에 위치한 상기 로고스키 내부코일을 다른 입력으로 연결하는 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 3항에 있어서,상기 보호용 회로의 입력으로 연결하는 일정 비율의 지점은,{최대운전전압 / 최대운전전류}를 {최대사고전압 / 최대사고전류}로 나눈 비율로 설정되는 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 5항에 있어서,상기 일정 비율은, 상기 최대사고전압과 상기 최대운전전압이 일정한 경우 상기 최대사고전류를 상기 최대운전전류로 나눈 비율과 동일한 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 5항에 있어서,상기 최대사고전류는, 정격사고전류 대비 2배 내지 3.4배의 전류가 측정 가능하도록 설정되는 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
- 제 1항에 있어서,상기 보호용 회로 및 상기 측정용 회로는, 수동소자 적분기 또는 능동소자 적분기로 이루어지는 것을 특징으로 하는 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP21945361.0A EP4431958A1 (en) | 2021-11-12 | 2021-11-23 | Measurement device for measuring operation current and fault current of circuit breaker by using single rogowski coil |
US18/010,556 US20230341441A1 (en) | 2021-11-12 | 2021-11-23 | Circuit breaker operating current/fault current measuring device using single rogowski coil |
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KR10-2021-0156099 | 2021-11-12 | ||
KR1020210156099A KR102651997B1 (ko) | 2021-11-12 | 2021-11-12 | 단일 로고스키 코일을 이용한 차단기 운전전류 및 사고전류 측정장치 |
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EP (1) | EP4431958A1 (ko) |
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2021
- 2021-11-12 KR KR1020210156099A patent/KR102651997B1/ko active IP Right Grant
- 2021-11-23 US US18/010,556 patent/US20230341441A1/en active Pending
- 2021-11-23 WO PCT/KR2021/017225 patent/WO2023085485A1/ko active Application Filing
- 2021-11-23 EP EP21945361.0A patent/EP4431958A1/en active Pending
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KR20110009515A (ko) * | 2009-07-22 | 2011-01-28 | 제이앤디전자(주) | 전류 측정 장치 |
KR101169301B1 (ko) * | 2011-03-04 | 2012-07-30 | 주식회사 셀픽 | 로고스키 코일을 이용한 전류센서 |
KR102216370B1 (ko) * | 2014-01-07 | 2021-02-16 | 파워 일렉트로닉 메져먼츠 엘티디 | 차폐 코일을 갖는 고대역폭 로고프스키 트랜스듀서 |
KR101539376B1 (ko) * | 2014-11-04 | 2015-07-28 | 주식회사 리폼테크 | 다목적을 위한 로고스키 코일 |
KR20190049662A (ko) | 2019-04-23 | 2019-05-09 | 주식회사 아이티이 | 전기고장 만능 복구(차단)기 |
KR102162207B1 (ko) * | 2019-09-30 | 2020-10-07 | 동명대학교산학협력단 | 로고스키 코일을 이용한 직류전류 측정장치 |
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KR102651997B1 (ko) | 2024-03-29 |
EP4431958A1 (en) | 2024-09-18 |
US20230341441A1 (en) | 2023-10-26 |
KR20230069750A (ko) | 2023-05-19 |
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