WO2011130905A1 - 脉冲电流传感器及采用该传感器制成的记录电涌波防雷箱 - Google Patents
脉冲电流传感器及采用该传感器制成的记录电涌波防雷箱 Download PDFInfo
- Publication number
- WO2011130905A1 WO2011130905A1 PCT/CN2010/071901 CN2010071901W WO2011130905A1 WO 2011130905 A1 WO2011130905 A1 WO 2011130905A1 CN 2010071901 W CN2010071901 W CN 2010071901W WO 2011130905 A1 WO2011130905 A1 WO 2011130905A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pulse current
- current sensor
- semi
- lightning protection
- line
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/085—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current making use of a thermal sensor, e.g. thermistor, heated by the excess current
-
- 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
- G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
-
- 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
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
Definitions
- Pulse current sensor and recording surge wave lightning protection box made by the same
- the present invention relates to a lightning protection box for recording a surge wave lightning protection box, in particular for wavy recording of lightning current and surge current.
- known lightning protection boxes are composed of a housing, a terminal, a conductive connection, an electrode, a semiconductor chip, a mechanical thermal trip device, a pointing device, a counter device, a current peak display, and a mounting fixture.
- the working principle is to be installed between the phase line and the ground line, the neutral line and the ground line of the power distribution system.
- the present invention provides a lightning protection box capable of completely recording the overvoltage waveform, and the lightning protection box can identify and record each pass.
- the lightning wave, the time when the surge wave overvoltage occurs, the shape of the waveform and the parameters solve the problem that the existing lightning protection box cannot record the waveform and thus cannot analyze and evaluate the accident caused by lightning or surge waveform.
- the present invention adopts the following technical solutions:
- a pulse current sensor includes: a pair of oppositely disposed semi-circular arc cores, an air gap between the two semi-circular arc cores, an air gap jacket having a non-magnetic metal conductive ring, and the non-magnetic metal conductive
- the inner hole axis of the ring is identical to the magnetic line of the semi-circular magnetic core; a coil is wound around the semi-circular magnetic core, and an output terminal is taken out from the coil.
- the semi-circular magnetic core is disposed in a cavity formed by the insulating base and the magnetically shielded outer casing.
- a semiconductor chip is disposed between the phase line and the neutral line, and the ground line is connected to the ground line
- a pulse current sensor is disposed on the ground line, and the pulse current sensor is connected to the single chip through the A/D conversion interface,
- the MCU is connected to the display.
- the single chip microcomputer is connected to a computer system through a communication interface, and the computer system is connected to the display device and the printer.
- the communication interface is an RS232 interface.
- the microcontroller is also connected to a backup battery.
- a work failure indicator and a work normal indicator are set on each of the phase and neutral lines.
- a pulse current sensor is disposed on the ground line, and the pulse current sensor is respectively mounted with two non-magnetic metal conductive rings in two gaps of two semi-circular magnetic core symmetry, so that Under the action of two semicircular arc cores, the pulse current sensor does not exhibit magnetic saturation, which improves the output accuracy and output range of the pulse current sensor, and lays a foundation for displaying the entire voltage waveform diagram, and the pulse current sensor Increased test sensitivity and reduced measurement error.
- the semiconductor chip when a lightning wave or a surge wave occurs, the semiconductor chip is excited to conduct, causing the overvoltage to discharge along the ground line to the ground, and the pulse current sensor mounted on the ground line divides the collected data by resistance division, isolation amplification, level Conversion, A / D conversion, and pre-isolation, trigger comparison, CPLD control are stored in the FLASH memory by the microcontroller system and displayed on the display.
- the computer software system can transfer the entire waveform, time and parameters of the stored record to In the computer, the waveforms, real-time time and history can be printed one by one on the display with parameter coordinates, and the accidents caused by lightning or surge waves can be visually analyzed and judged.
- FIG. 1 is an electrical schematic structural diagram of a pulse current sensor according to the present invention
- FIG. 2 is a schematic view showing the overall structure of a pulse current sensor according to the present invention.
- Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
- FIG. 4 is a schematic structural view of a lightning surge protection box recorded in the present invention.
- FIG. 5 is a circuit block diagram of a lightning surge protection box for recording a surge wave according to the present invention.
- FIG. 6 is a flow chart of recording a current waveform of a surge wave lightning protection box in the present invention.
- Fig. 7 is a diagram showing the current waveforms of the surge surge arrester recorded in the present invention.
- the pulse current sensor in this embodiment refers to: a pair of oppositely disposed semi-circular cores 22, an air gap 30 between the two semi-circular cores 22, and an air gap 30.
- Magnetic metal conduction The ring 29, the inner hole axis of the non-magnetic metal conductive ring 29 coincides with the magnetic line of the semicircular arc core 22; the coil 23 is wound around the semicircular core 22, and the output terminal 31 is taken out from the coil 23.
- the semicircular arc core 22 in the present invention refers to a shape similar to a semicircle, gp: it may be two regular semicircles with an air gap 30 in between; or may be slightly smaller than a semicircle A pair of arcs, the middle of which is an air gap 30.
- the pulse current sensor is an improvement on the Rogowski coil, and the specific degaussing principle is:
- the originally closed full-circle core is changed into two semi-circular cores 22, and the two semi-circular cores 22 and the two air gaps 30 together form a magnetic circuit, since the magnetic resistance of the air gap 30 is far Far greater than the magnetic reluctance of the magnetic material of the two semi-circular cores 22, so that most of the magnetic field energy is concentrated in the air gap 30, so that it can withstand greater magnetic field strength than the original magnetic field;
- two semi-circular magnetic cores 22 and the two air gaps 30 together form a magnetic field on the magnetic circuit, since the air gap 30 passes through the two non-magnetic metal conductive rings 29 along the center line of the magnetic circuit and is radially surrounded by them, thus the two non-magnetic metals
- the radial ring current is generated in the conductive ring 29, and the magnetic field generated by the ring current on the two non-magnetic metal conductive rings 29 is opposite to the original magnetic field, and can also cancel the magnetic field strength of the magnetic circuit;
- Joule heat is generated after passing the current, and Joule heat raises the temperature of the two non-magnetic metal conductive rings 29, that is, in the two air gap magnetic fields.
- Magnetic field energy Through both conductive non-magnetic metal rings 29 into heat energy, so able to withstand greater than the original magnetic field strength. Therefore, under the action of the two arc cores 22, the two air gaps 30 and the two air gaps 30, the magnetic field saturation phenomenon does not occur in the set range, thereby increasing the output of the pulse current sensor 17.
- Accuracy and output range improve test sensitivity, reduce measurement error, and thus collect current peaks and current values at various real-time points, to achieve the width, shape, size, energy and time of the output voltage and current waveforms The foundation.
- the semicircular arc core 22 should be disposed on the insulating base 28 and the magnetically shielded outer casing 21.
- the wire to be tested is a conductive post 25 provided on the insulating base 28.
- a primary coil winding conductive post 25 is fixedly disposed on the insulating base 28, and an insulating spacer 24 is mounted on one end of the primary coil winding conductive post 25, and the insulating spacer 24 is pressed against the nut. 26 fastening.
- the insulating base 28 is connected to the magnetically shielded outer casing 21, and a pair of semi-circular magnetic cores 22 are fixedly disposed in the cavity formed by the insulating base 28 and the magnetically shielded outer casing 21 by a non-magnetic pin 27, a semicircle
- the secondary coil winding 23 is wound around the arc core 22, and the non-magnetic metal conductive ring 29 is fixedly disposed in the two gaps of the pair of semi-circular arc cores 22, and the inner hole axis and the arc of the non-magnetic metal conductive ring 29 are fixed.
- the magnetic lines of the magnetic core 22 and the air gap 30 are identical.
- the conductive column 25 is the primary coil winding of the pulse current sensor
- two The coil 23 on the semicircular arc core 22 is the secondary coil winding of the pulse current sensor
- the two non-magnetic metal conductive rings 29 placed in the two gaps symmetrically at the two ends of the arc core 22 are degaussing coils. Winding.
- the primary coil winding conductive column 25 passes a pulse current
- the two secondary coil windings on the two semi-circular magnetic cores 22 induce a voltage
- the voltage is integrated to restore the primary coil winding conductive column 25
- the pulse current passed on. Since the presence of the pulse current sensor 17 as shown in Fig. 1, the measurement range can be increased, thereby obtaining a waveform diagram of the entire voltage and current.
- the present invention further prepares a surge arrester for recording a surge wave.
- the recorded surge wave lightning protection box is provided with three phase lines 6, a neutral line 7, a terminal 18 and a ground line 16 in the outer casing 20, and the phase line 6 and the neutral line 7 are connected to the ground line 16.
- the grounding wire 16 is electrically connected to the outer casing and grounded.
- the switch 5, the thermal trip relay device 4 and the electrode 1 are arranged in series on each of the phase line 6 and the neutral line 7, and a semiconductor chip 19 is disposed between the two poles of the electrode 1, such that each semiconductor chip 19 Both can be connected to the ground line 16.
- a pulse current sensor 17 is provided on the ground line 16, and a pulse current sensor 17 is used to collect voltage and current data discharged to the ground.
- the output of the pulse current sensor 17 is divided into two paths after being divided by a voltage dividing resistor. As shown in Figure 5, one path is isolated, amplified, level-shifted, and A/D-converted, and then stored in the FIFO to the microcontroller 14; the other path is stored in the FIFO via the FIFO after pre-isolation, trigger comparison, and CPLD control.
- the peripheral of the MCU 14 is equipped with a clock circuit and a FLASH memory, and the output of the MCU 14 is connected to the liquid crystal display 8.
- the output end of the single chip microcomputer 14 can also be connected to the peripheral computer system 11 through the communication interface 10.
- the above communication interface 10 can be an RS232 communication interface or a 485 interface.
- the peripheral computer system 11 can be remotely controlled and can be displayed and output through peripheral devices such as the connected display device 12 and the printer 13.
- the working indicator power line can be connected to each phase line 6 and the neutral line 7.
- the working indicator light is divided into two types: the work failure indicator light 2 and the working normal indicator light 3, which are driven by the thermal trip relay device 4. Indicates the control circuit.
- the single chip microcomputer 14 is connected with the backup battery 9.
- the semiconductor chip 9 is energized to be turned on, so that the overvoltage is discharged to the ground along the ground line 16, and the pulse current sensor 17 mounted on the ground line divides the collected data by a resistor, Isolation amplification, level conversion, AID conversion, and pre-isolation, trigger comparison, CPLD control are stored in the FLASH memory by the MCU system and displayed on the display.
- the computer is connected via the RS232 interface, and the computer software system can store the record. Waveforms, time, and parameters are transmitted to the computer, which can be displayed on the display with parameter coordinates and printed out waveforms, real-time time and history to visually analyze and determine the accident caused by lightning or surge waves, such as Figure 6 shows.
- the display gives the current waveform of the surge wave in the plane coordinates, Table 1
- the current peak, anti-peak, wavefront time, wave tail time, and charge parameters of this surge wave are given.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/581,822 US20130088804A1 (en) | 2010-04-20 | 2010-04-20 | Pulse current sensor and lightning protection cabinet with surge wave recording composed of the sensor |
JP2013505292A JP5513677B2 (ja) | 2010-04-20 | 2010-04-20 | パルス電流センサー及び該センサーを有するサージ波記録型雷防護キャビネット |
EP10850039A EP2562549A1 (en) | 2010-04-20 | 2010-04-20 | Pulse current sensor and lightning protection cabinet with surge wave recording composed of the sensor |
PCT/CN2010/071901 WO2011130905A1 (zh) | 2010-04-20 | 2010-04-20 | 脉冲电流传感器及采用该传感器制成的记录电涌波防雷箱 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2010/071901 WO2011130905A1 (zh) | 2010-04-20 | 2010-04-20 | 脉冲电流传感器及采用该传感器制成的记录电涌波防雷箱 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011130905A1 true WO2011130905A1 (zh) | 2011-10-27 |
Family
ID=44833631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2010/071901 WO2011130905A1 (zh) | 2010-04-20 | 2010-04-20 | 脉冲电流传感器及采用该传感器制成的记录电涌波防雷箱 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130088804A1 (zh) |
EP (1) | EP2562549A1 (zh) |
JP (1) | JP5513677B2 (zh) |
WO (1) | WO2011130905A1 (zh) |
Families Citing this family (7)
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US9739818B2 (en) * | 2014-03-12 | 2017-08-22 | The Boeing Company | Electromagnetic effect testing |
CN103987220A (zh) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | 一种扁式防雷信号箱 |
CN106093548B (zh) * | 2016-08-04 | 2018-12-14 | 中国船舶重工集团公司第七一九研究所 | 一种非接触式的高精度轴电流测量装置 |
EP3309559A1 (en) * | 2016-10-11 | 2018-04-18 | LEM Intellectual Property SA | Electrical current transducer |
KR101984073B1 (ko) * | 2018-06-15 | 2019-05-31 | 주식회사 엘피에스코리아 | 로고스키 코일을 이용한 임펄스 전류측정장치 |
CN114915173A (zh) * | 2021-02-08 | 2022-08-16 | 台达电子工业股份有限公司 | 柔切式电源转换器 |
CN115577272B (zh) * | 2022-12-06 | 2023-02-28 | 昆明理工大学 | 一种基于故障录波数据的多重雷击判别方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0464068A (ja) * | 1990-07-02 | 1992-02-28 | Fuji Electric Co Ltd | 直流電流検出方法 |
JPH06331659A (ja) * | 1993-05-21 | 1994-12-02 | Mitsubishi Electric Corp | パルス電流モニタ |
JPH11133084A (ja) * | 1997-10-30 | 1999-05-21 | Railway Technical Res Inst | サージ電流検出装置 |
CN1721862A (zh) * | 2004-07-14 | 2006-01-18 | 深圳锦天乐防雷技术有限公司 | 记录雷击电流强度和发生时间的方法及设备 |
CN201072427Y (zh) * | 2007-09-14 | 2008-06-11 | 清华大学 | 一种基于柔性罗氏线圈的脉冲电流测量装置 |
CN201307766Y (zh) * | 2008-12-05 | 2009-09-09 | 刘市平 | 电源防雷箱 |
JP2009222663A (ja) * | 2008-03-18 | 2009-10-01 | Nec Saitama Ltd | サージ電流検出方法及び避雷器 |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3137800A (en) * | 1960-12-19 | 1964-06-16 | Gen Motors Corp | Dynamoelectric machine rotor means |
DE1583641B2 (de) * | 1967-09-19 | 1976-07-01 | Heide, Otto, Dr.-Ing., 5829 Ennepetal | Vorrichtung zum beheizen von speisern und blockkoepfen |
US4980794A (en) * | 1987-02-19 | 1990-12-25 | Westinghouse Electric Corp. | Electromagnetic contactor with lightweight wide range current transducer with sintered powdered metal core |
JPS63263479A (ja) * | 1987-04-21 | 1988-10-31 | Sumitomo Electric Ind Ltd | 送電線事故位置検出装置 |
JPH0167274U (zh) * | 1987-10-23 | 1989-04-28 | ||
JP2560382Y2 (ja) * | 1991-08-06 | 1998-01-21 | 日新電機株式会社 | 開閉器の直流制御信号検出装置 |
US5155676A (en) * | 1991-11-01 | 1992-10-13 | International Business Machines Corporation | Gapped/ungapped magnetic core |
JP2741131B2 (ja) * | 1992-03-19 | 1998-04-15 | 日置電機株式会社 | 電源監視レコーダ |
JPH05346443A (ja) * | 1992-06-16 | 1993-12-27 | Kinkei Syst:Kk | デジタル式電力系統事故監視記録装置 |
JPH06213937A (ja) * | 1993-01-21 | 1994-08-05 | Mitsubishi Electric Corp | 電流測定器 |
CA2145691A1 (en) * | 1993-12-08 | 1996-09-29 | Stephen B. Kuznetsov | Method and apparatus for limiting high current electrical faults in distribution networks by use of superconducting excitation in transverse flux magnetic circuit |
JP3458122B2 (ja) * | 1994-07-25 | 2003-10-20 | 中部電力株式会社 | 地絡電流表示器 |
JPH08105931A (ja) * | 1994-10-03 | 1996-04-23 | Mitsubishi Electric Corp | 酸化亜鉛形避雷器の劣化検出装置 |
US5808384A (en) * | 1997-06-05 | 1998-09-15 | Wisconsin Alumni Research Foundation | Single coil bistable, bidirectional micromechanical actuator |
JPH11223643A (ja) * | 1997-11-18 | 1999-08-17 | Matsushita Electric Ind Co Ltd | マルチメータ |
US6348751B1 (en) * | 1997-12-12 | 2002-02-19 | New Generation Motors Corporation | Electric motor with active hysteresis-based control of winding currents and/or having an efficient stator winding arrangement and/or adjustable air gap |
US6532161B2 (en) * | 1999-12-07 | 2003-03-11 | Advanced Energy Industries, Inc. | Power supply with flux-controlled transformer |
DE10022082C1 (de) * | 2000-05-08 | 2001-10-18 | Siedle Horst Gmbh & Co Kg | Induktiver Messumformer |
JP2001349908A (ja) * | 2000-06-07 | 2001-12-21 | Shoden Corp | 落雷電流検出装置 |
JP3720693B2 (ja) * | 2000-09-08 | 2005-11-30 | 株式会社日立産機システム | 回路遮断器及びそれを用いた通電情報監視システム |
DE10110475A1 (de) * | 2001-03-05 | 2002-09-26 | Vacuumschmelze Gmbh & Co Kg | Übertrager für einen Stromsensor |
ITBO20010390A1 (it) * | 2001-06-19 | 2002-12-19 | Magneti Marelli Spa | Metodo di controllo di un attuatore elettromagnetico per il comando di una valvola di un motore a partire da una condizione di battuta |
US6913145B2 (en) * | 2003-04-15 | 2005-07-05 | Lincoln Global, Inc. | Welding wire container with ribbed walls and a mating retainer ring |
JP2005214819A (ja) * | 2004-01-30 | 2005-08-11 | Central Res Inst Of Electric Power Ind | 衝撃電流検出器 |
US7915993B2 (en) * | 2004-09-08 | 2011-03-29 | Cyntec Co., Ltd. | Inductor |
FR2877486B1 (fr) * | 2004-10-29 | 2007-03-30 | Imphy Alloys Sa | Tore nanocristallin pour capteur de courant, compteurs d'energie a simple et a double etage et sondes de courant les incorporant |
JP2008145220A (ja) * | 2006-12-08 | 2008-06-26 | Fdk Corp | 電流センサ |
JP2008145219A (ja) * | 2006-12-08 | 2008-06-26 | Fdk Corp | 電流センサ |
US8400788B2 (en) * | 2006-12-20 | 2013-03-19 | Primozone Production Ab | Power supply apparatus for a capacitive load |
JP4934652B2 (ja) * | 2008-09-24 | 2012-05-16 | 日本電信電話株式会社 | サージカウンタ |
EP2216794B1 (en) * | 2009-02-05 | 2011-10-26 | Abb Oy | Permanent magnet DC inductor |
US8717016B2 (en) * | 2010-02-24 | 2014-05-06 | Infineon Technologies Ag | Current sensors and methods |
EP2515125B1 (en) * | 2011-04-21 | 2017-02-01 | Abb Ag | Current sensor with a magnetic core |
-
2010
- 2010-04-20 WO PCT/CN2010/071901 patent/WO2011130905A1/zh active Application Filing
- 2010-04-20 US US13/581,822 patent/US20130088804A1/en not_active Abandoned
- 2010-04-20 EP EP10850039A patent/EP2562549A1/en not_active Withdrawn
- 2010-04-20 JP JP2013505292A patent/JP5513677B2/ja not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0464068A (ja) * | 1990-07-02 | 1992-02-28 | Fuji Electric Co Ltd | 直流電流検出方法 |
JPH06331659A (ja) * | 1993-05-21 | 1994-12-02 | Mitsubishi Electric Corp | パルス電流モニタ |
JPH11133084A (ja) * | 1997-10-30 | 1999-05-21 | Railway Technical Res Inst | サージ電流検出装置 |
CN1721862A (zh) * | 2004-07-14 | 2006-01-18 | 深圳锦天乐防雷技术有限公司 | 记录雷击电流强度和发生时间的方法及设备 |
CN201072427Y (zh) * | 2007-09-14 | 2008-06-11 | 清华大学 | 一种基于柔性罗氏线圈的脉冲电流测量装置 |
JP2009222663A (ja) * | 2008-03-18 | 2009-10-01 | Nec Saitama Ltd | サージ電流検出方法及び避雷器 |
CN201307766Y (zh) * | 2008-12-05 | 2009-09-09 | 刘市平 | 电源防雷箱 |
Also Published As
Publication number | Publication date |
---|---|
EP2562549A1 (en) | 2013-02-27 |
JP2013535001A (ja) | 2013-09-09 |
US20130088804A1 (en) | 2013-04-11 |
JP5513677B2 (ja) | 2014-06-04 |
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