CN108828305A - A kind of transformer iron core grounding current measuring device - Google Patents

A kind of transformer iron core grounding current measuring device Download PDF

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Publication number
CN108828305A
CN108828305A CN201810714874.1A CN201810714874A CN108828305A CN 108828305 A CN108828305 A CN 108828305A CN 201810714874 A CN201810714874 A CN 201810714874A CN 108828305 A CN108828305 A CN 108828305A
Authority
CN
China
Prior art keywords
current
iron core
module
measuring device
transformer iron
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201810714874.1A
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Chinese (zh)
Inventor
姚阳
翁海涛
汤文博
果淼
刘雅琨
马国译
杨洁
郭宏伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hebei Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hebei Electric Power Co Ltd
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 State Grid Corp of China SGCC, Maintenance Branch of State Grid Hebei Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201810714874.1A priority Critical patent/CN108828305A/en
Publication of CN108828305A publication Critical patent/CN108828305A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

This application discloses a kind of transformer iron core grounding current measuring devices, including:Current acquisition module keeps connecting and acquiring the current information of the ground line for the ground line with transformer core;Display module is connect with the current acquisition module, for showing the current information.This transformer iron core grounding current measuring device keeps connecting by the ground line of current acquisition module and transformer core, and acquires the current information of ground line in real time, and current information is carried out real-time display finally by display module.Therefore, testing staff is not needed periodically to detect, only needing testing staff to observe the current information shown on display module at any time i.e. can determine whether transformer iron core grounding current is more than specified value, compared with existing detection methods, it being capable of real-time detection earth current, whether discovery earth current is more than specified value in time, and simplifies detection operation.

Description

A kind of transformer iron core grounding current measuring device
Technical field
The present invention relates to transformer detection technique field, in particular to a kind of transformer iron core grounding current measuring device.
Background technique
In normal work, it is uneven that electrified coil and conducting wire will lead to inside transformer electric field to transformer, transformer fe Core and metal parts are also in the electric field.The internal electric field of transformer is in a kind of state heterogeneous, not only the shape of power line Shape is more special, and the difference in size of each point current potential is also bigger, and iron core and other metal parts are because different positions is different Current potential, when the potential difference between two o'clock reaches breakdown voltage, it may occur that spark discharge, electric discharge can accelerate transformer oil and solid The damage of body insulation, if long-term development, it may occur that accident.
In order to avoid there is above situation, iron core and other metal parts must link together and be grounded with fuel tank, And only one point earth, so that them is in zero potential.Earth current is very small under normal circumstances, probably at tens milliamperes.But When iron core is there are when more than two o'clock ground connection, will be formed into a loop between iron core and the earth, earth current at this time will Increase many times larger, causes security risk.Therefore, in current power transformation operation work, staff needs periodically to carry out electrification Detect work, that is, measure whether iron core grounding current is more than specified value using ammeter.
But periodic measurement transformer iron core grounding current is relatively complicated, and whether can not find earth current in time More than specified value.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of transformer iron core grounding current measuring devices, to examine in real time The earth current of transformer core is surveyed, the detection operation of earth current is simplified.
In order to achieve the above objectives, the present invention provides following technical scheme:
A kind of transformer iron core grounding current measuring device, including:
Current acquisition module keeps the electric current for connecting and acquiring the ground line to believe for the ground line with transformer core Breath;
Display module is connect with the current acquisition module, for showing the current information.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the current acquisition module includes:
Ac leakage flow sensor, for keeping connecting and acquiring the current signal of the ground line with the ground line, And output voltage signal;
A/D conversion module is connect with the ac leakage flow sensor, for converting digital letter for the voltage signal Number;
Processing module is all connected with the A/D conversion module and the display module, and the processing module is according to the number The current information is calculated in word signal, and the current information is transferred to the display module.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the ac leakage flow sensor is to open Mouth formula ac leakage flow sensor.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the processing module is single-chip microcontroller, PLC Or computer.
Preferably, in above-mentioned transformer iron core grounding current measuring device, further include and the current acquisition module The power supply module of connection.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the power supply module is battery or exchange Power supply.
Preferably, in above-mentioned transformer iron core grounding current measuring device, further include and the current acquisition module The cue module of connection, for when the current information is more than setting electric current value, the cue module to be prompted.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the setting electric current value be 90mA~ Any value in 110mA.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the cue module includes auditory tone cues Unit and/or light prompt unit.
Preferably, in above-mentioned transformer iron core grounding current measuring device, the cue module is to mention with sound Show the alarm lamp of function.
Compared with prior art, the beneficial effects of the invention are as follows:
Transformer iron core grounding current measuring device provided by the invention passes through current acquisition module and transformer core Ground line keeps connection, and acquires the current information of ground line in real time, carries out current information in real time finally by display module Display.It therefore, there is no need to testing staff periodically to detect, it is only necessary to which testing staff observes the electricity shown on display module at any time Stream information can determine whether transformer iron core grounding current is more than specified value, compared with existing detection methods, can be real-time Earth current is detected, finds whether earth current is more than specified value in time, and simplifies detection operation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of transformer iron core grounding current measuring device provided in an embodiment of the present invention;
Fig. 2 is the structural schematic diagram of another transformer iron core grounding current measuring device provided in an embodiment of the present invention;
Fig. 3 is the structural schematic diagram of another transformer iron core grounding current measuring device provided in an embodiment of the present invention.
Specific embodiment
There is provided a kind of transformer iron core grounding current measuring devices for core of the invention, being capable of real-time detection transformer The earth current of iron core simplifies the detection operation of earth current.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, hereinafter referred to as being surveyed the embodiment of the invention provides a kind of transformer iron core grounding current measuring device Measure device comprising current acquisition module 1 and display module 2, wherein current acquisition module 1 is used to connect with transformer core Ground wire keeps connection, and acquires the current information of ground line, that is, current acquisition module 1 is connected on ground line always;Show mould Block 2 is connect with current acquisition module 1, the current information acquired for showing current acquisition module 1.
When the measuring device works, the ground line of current acquisition module 1 and transformer core is kept connecting, current acquisition The current information that acquisition is grounded in real time of module 1, carries out real-time display for current information finally by display module 2.Therefore, no Testing staff is needed periodically to detect, it is only necessary to which testing staff observes the current information shown on display module 2 at any time Judge whether transformer iron core grounding current is more than specified value, it compared with existing detection methods, being capable of real-time detection ground connection electricity Stream finds whether earth current is more than specified value in time, and simplifies detection operation.
As shown in Fig. 2, the embodiment of the invention provides a kind of specific current acquisition module 1, the current acquisition module 1 packet Include ac leakage flow sensor 11, A/D conversion module 12 and processing module 13, wherein ac leakage flow sensor 11 be used for Ground line keeps connection, and acquires the current signal of ground line, exports after converting voltage signal for current signal;A/D conversion Module 12 is connect with ac leakage flow sensor 11, and the voltage signal for exporting ac leakage flow sensor 11 is converted into number Word signal;Processing module 13 and A/D conversion module 12 and display module 2 are all connected with, and processing module 13 is according to A/D conversion module 12 The digital signal of conversion is calculated the current information of corresponding testing result, and by the current information be transferred to display module 2 into Row display.
It is capable of the current signal of real-time detection ground line using ac leakage flow sensor 11.
Further, in the present embodiment, ac leakage flow sensor 11 uses open type ac leakage flow sensor.It opens Mouthful formula ac leakage flow sensor can be open, and directly vise the connection that ground line can be realized and is grounded, do not need by Ground line packs into open type ac leakage sensor, facilitates detection.Certainly, ac leakage flow sensor 11 can also use Closed type ac leakage flow sensor only needs to pack into ground line in closed type ac leakage flow sensor, and operation is not so good as The convenience of open type.
In the present embodiment, processing module 13 is single-chip microcontroller, PLC or computer, as long as can be realized input, output and meter Calculate function.
As shown in Fig. 2, the measuring device in the present embodiment further includes the power supply module 3 connecting with current acquisition module 1, tool Body, power supply module 3 is with ac leakage flow sensor 11 and processing module 13 for being electrically connected.
As optimization, in the present embodiment, it is current acquisition mould by battery that power supply module 13, which is battery or AC power source, Block 1 is powered, or directly passing through AC power source is the power supply of current acquisition module 1.
As shown in figure 3, in the present embodiment, measuring device further includes the cue module 4 connecting with current acquisition module 1, When current information is more than setting electric current value, cue module 4 is prompted, to prompt testing staff to find the problem in time and carry out Follow-up work.
As optimization, in the present embodiment, setting electric current value is any value in 90mA~110mA, usually will setting electricity Flow valuve is set as 100mA.
As optimization, cue module 4 includes auditory tone cues unit and/or light prompt unit, that is, cue module 4 can be with Include individually auditory tone cues unit, is only prompted by sound, can also include individually light prompt unit, only pass through light It is prompted, or simultaneously includes auditory tone cues unit and light prompt unit, prompted simultaneously by sound and light.
Specifically, cue module 4 is the alarm lamp with voice prompt function, while carrying out audible alarm, alarm Lamp carries out flashing or luminous prompting.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (10)

1. a kind of transformer iron core grounding current measuring device, which is characterized in that including:
Current acquisition module keeps connecting and acquiring the current information of the ground line for the ground line with transformer core;
Display module is connect with the current acquisition module, for showing the current information.
2. transformer iron core grounding current measuring device according to claim 1, which is characterized in that the current acquisition mould Block includes:
Ac leakage flow sensor, for keeping connecting and acquiring the current signal of the ground line with the ground line, and it is defeated Voltage signal out;
A/D conversion module is connect with the ac leakage flow sensor, for converting digital signal for the voltage signal;
Processing module is all connected with the A/D conversion module and the display module, and the processing module is believed according to the number Number the current information is calculated, and the current information is transferred to the display module.
3. transformer iron core grounding current measuring device according to claim 2, which is characterized in that the ac leakage stream Sensor is open type ac leakage flow sensor.
4. transformer iron core grounding current measuring device according to claim 2, which is characterized in that the processing module is Single-chip microcontroller, PLC or computer.
5. transformer iron core grounding current measuring device according to claim 1-4, which is characterized in that further include The power supply module being connect with the current acquisition module.
6. transformer iron core grounding current measuring device according to claim 5, which is characterized in that the power supply module is Battery or AC power source.
7. transformer iron core grounding current measuring device according to claim 1-4, which is characterized in that further include The cue module connecting with the current acquisition module is used for the prompt when the current information is more than setting electric current value Module is prompted.
8. transformer iron core grounding current measuring device according to claim 7, which is characterized in that the setting electric current value For any value in 90mA~110mA.
9. transformer iron core grounding current measuring device according to claim 7, which is characterized in that the cue module packet Include auditory tone cues unit and/or light prompt unit.
10. transformer iron core grounding current measuring device according to claim 10, which is characterized in that the cue module For the alarm lamp with voice prompt function.
CN201810714874.1A 2018-07-03 2018-07-03 A kind of transformer iron core grounding current measuring device Pending CN108828305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810714874.1A CN108828305A (en) 2018-07-03 2018-07-03 A kind of transformer iron core grounding current measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810714874.1A CN108828305A (en) 2018-07-03 2018-07-03 A kind of transformer iron core grounding current measuring device

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Publication Number Publication Date
CN108828305A true CN108828305A (en) 2018-11-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113552411A (en) * 2021-06-07 2021-10-26 广西电网有限责任公司贵港供电局 Transformer core current data instrument

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202522618U (en) * 2012-04-10 2012-11-07 重庆市电力公司长寿供电局 Device for carrying out online monitoring on grounding of transformer core
CN103116063A (en) * 2013-01-23 2013-05-22 大连新安越电力设备有限公司 Transformer iron core ground connection electric current monitor
CN204287307U (en) * 2014-11-07 2015-04-22 国网甘肃省电力公司甘南供电公司 Transformer, current detection circuit based on transformer
CN207248983U (en) * 2017-09-08 2018-04-17 西安乾通电器设备有限公司 A kind of transformer iron core grounding current monitoring device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202522618U (en) * 2012-04-10 2012-11-07 重庆市电力公司长寿供电局 Device for carrying out online monitoring on grounding of transformer core
CN103116063A (en) * 2013-01-23 2013-05-22 大连新安越电力设备有限公司 Transformer iron core ground connection electric current monitor
CN204287307U (en) * 2014-11-07 2015-04-22 国网甘肃省电力公司甘南供电公司 Transformer, current detection circuit based on transformer
CN207248983U (en) * 2017-09-08 2018-04-17 西安乾通电器设备有限公司 A kind of transformer iron core grounding current monitoring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113552411A (en) * 2021-06-07 2021-10-26 广西电网有限责任公司贵港供电局 Transformer core current data instrument

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Application publication date: 20181116

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