WO2014012241A1 - Structure de mesure de transformation de courant à montage latéral et procédé de mesure - Google Patents

Structure de mesure de transformation de courant à montage latéral et procédé de mesure Download PDF

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Publication number
WO2014012241A1
WO2014012241A1 PCT/CN2012/078919 CN2012078919W WO2014012241A1 WO 2014012241 A1 WO2014012241 A1 WO 2014012241A1 CN 2012078919 W CN2012078919 W CN 2012078919W WO 2014012241 A1 WO2014012241 A1 WO 2014012241A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
measuring
conductive cable
measuring method
measured
Prior art date
Application number
PCT/CN2012/078919
Other languages
English (en)
Chinese (zh)
Inventor
宁文源
贾超晨
宁远
Original Assignee
Ning Wenyuan
Jia Chaochen
Ning Yuan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ning Wenyuan, Jia Chaochen, Ning Yuan filed Critical Ning Wenyuan
Priority to PCT/CN2012/078919 priority Critical patent/WO2014012241A1/fr
Publication of WO2014012241A1 publication Critical patent/WO2014012241A1/fr

Links

Classifications

    • 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
    • G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • G01R15/148—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop involving the measuring of a magnetic field or electric field
    • 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

Definitions

  • the current current sampling uses the structure of a through-core current transformer.
  • This measurement method requires the conductor to pass through the center of the closed magnetic medium of the transformer to quantify the magnetic field around the path to characterize the current.
  • the requirements for the measurement structure and measurement method of the core-through current mutual inductance make the use of the current transformer limited by the shape and position of the conductive cable, and the size of the electrical equipment to which it belongs is large.
  • the conventional structure of the core current mutual inductance has a limit on the maximum value of the current to be measured, and the internal magnetic sensitive elements have magnetic saturation.
  • the output signal strength of the closed core-through current mutual inductance structure cannot be output in a consistent proportion with the magnitude of the measured current (the output characteristic curve is not a straight line).
  • the capacity of the electromagnetic current exchange inside the conventional current transformer is large, and its weight volume cannot be reduced.
  • the measuring structure and measuring method of the NB type side-mounted current mutual inductance do not require a magnetic medium to surround the conductive cable within a certain distance of the side of the measured electrical conductor.
  • the measurement method and measurement structure of the side-mounted current mutual inductance are not limited by the shape and position (shape and position) of the conductor to be tested, and the volume and weight of the sensor itself and the volume of the device according to the measurement structure and measurement method of the side-mounted current mutual inductance. The weight is several times smaller than the conventional one.
  • the measurement structure and measurement method of the NB type side current mutual inductance are not magnetically saturated, and the measurement range is not limited by the power of the device itself, so the measured output signal and the measured current intensity are output in a uniform ratio (the output characteristic curve is a straight line).
  • the method utilizes a linear relationship between the magnetic field strength on the side of the conductive cable and the current intensity in the conductive cable, and extracts the magnetic field strength of the side of the conductive cable by the side mutual inductance element to achieve sampling and characterization of the current intensity in the conductive cable. the goal of.
  • the method of characterizing the current intensity in the conductive cable by using the measurement of the entire circumferential magnetic line around the conductive cable is broken.
  • the side-mounted current mutual inductance structure and measurement method do not require a conductive cable to pass through the center of the measuring device, and only need to be placed on the side of the cable to perform current measurement method for current intensity measurement.
  • the side-mounted current mutual inductance measurement structure and measurement method fundamentally facilitate the installation of the current mutual inductance component, and facilitate the flexible setting of the detection point, and at the same time, the non-core-through mutual inductance component can be reduced in volumetric weight relative to the core-through type. Times.
  • Figure 1 shows the power cable.
  • Figure 2 shows a side-mounted current mutual inductance component.
  • Figure 3 shows the mounting structure of the side-mounted current mutual inductance element.
  • the current of the conductive cable can be detected by placing the side-mounted current mutual inductance component within a certain distance of the side of the conductive cable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

La présente invention concerne une structure de mesure de transformation de courant à montage latéral et un procédé de mesure. Un élément de transformation de courant est installé à une certaine distance à côté d'un conducteur mesuré, et un diélectrique magnétique n'est pas nécessaire pour entourer un câble conducteur. La structure de mesure de transformation de courant à montage latéral et le procédé de mesure ne sont pas limités par une forme ni une position du câble conducteur, de sorte que l'élément de transformation de courant ne comporte pas de saturation magnétique à l'intérieur, et une plage de mesure n'est pas limitée par l'auto-alimentation du dispositif, de sorte qu'un signal de sortie de mesure et une intensité de courant mesuré soient sortis proportionnellement, et qu'une courbe caractéristique de sortie soit une ligne droite. Dans la structure de mesure de transformation de courant à montage latéral et le procédé de mesure, l'intensité de courant peut être mesurée par le montage latéral du dispositif de mesure à côté du câble conducteur sans qu'il soit nécessaire que le câble conducteur passe à travers un centre du dispositif de mesure.
PCT/CN2012/078919 2012-07-17 2012-07-20 Structure de mesure de transformation de courant à montage latéral et procédé de mesure WO2014012241A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/078919 WO2014012241A1 (fr) 2012-07-17 2012-07-20 Structure de mesure de transformation de courant à montage latéral et procédé de mesure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2012/071711 2012-07-17
PCT/CN2012/078919 WO2014012241A1 (fr) 2012-07-17 2012-07-20 Structure de mesure de transformation de courant à montage latéral et procédé de mesure

Publications (1)

Publication Number Publication Date
WO2014012241A1 true WO2014012241A1 (fr) 2014-01-23

Family

ID=49950100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/078919 WO2014012241A1 (fr) 2012-07-17 2012-07-20 Structure de mesure de transformation de courant à montage latéral et procédé de mesure

Country Status (1)

Country Link
WO (1) WO2014012241A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106160879A (zh) * 2015-04-11 2016-11-23 宁远 一种地线通信方法及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2266132Y (zh) * 1996-07-18 1997-10-29 介国安 电流传感器
CN1165954A (zh) * 1996-05-17 1997-11-26 介国安 电流传感器
CN201918253U (zh) * 2010-12-13 2011-08-03 士林电机（苏州）电力设备有限公司 一种电流互感器
CN202134397U (zh) * 2011-07-27 2012-02-01 珠海市丰兰实业有限公司 变比可调型电流互流器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1165954A (zh) * 1996-05-17 1997-11-26 介国安 电流传感器
CN2266132Y (zh) * 1996-07-18 1997-10-29 介国安 电流传感器
CN201918253U (zh) * 2010-12-13 2011-08-03 士林电机（苏州）电力设备有限公司 一种电流互感器
CN202134397U (zh) * 2011-07-27 2012-02-01 珠海市丰兰实业有限公司 变比可调型电流互流器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106160879A (zh) * 2015-04-11 2016-11-23 宁远 一种地线通信方法及系统
CN106160879B (zh) * 2015-04-11 2018-08-31 宁远 一种地线通信方法及系统

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