CN109100594A - A kind of adjustable damped oscillation magnetic field experimental rig of intensity - Google Patents

A kind of adjustable damped oscillation magnetic field experimental rig of intensity Download PDF

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Publication number
CN109100594A
CN109100594A CN201810983024.1A CN201810983024A CN109100594A CN 109100594 A CN109100594 A CN 109100594A CN 201810983024 A CN201810983024 A CN 201810983024A CN 109100594 A CN109100594 A CN 109100594A
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China
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current
magnetic field
carrying coil
damped oscillation
tested
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CN201810983024.1A
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Chinese (zh)
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CN109100594B (en
Inventor
宋丁
宋一丁
王振华
王晋华
余维高
龚兴全
吴雪玲
孙莹莹
孙振华
王淇森
陈号
赵群辉
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State Grid Corp of China SGCC
Xuji Group Co Ltd
XJ Electric Co Ltd
Xuchang XJ Software Technology Co Ltd
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State Grid Corp of China SGCC
Xuji Group Co Ltd
XJ Electric Co Ltd
Xuchang XJ Software Technology Co Ltd
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Priority to CN201810983024.1A priority Critical patent/CN109100594B/en
Publication of CN109100594A publication Critical patent/CN109100594A/en
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    • 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
    • G01R31/001Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

The present invention relates to a kind of adjustable damped oscillation magnetic field experimental rigs of intensity, including damped oscillation magnetic interference generator and current-carrying coil, damped oscillation magnetic interference generator exports current signal to current-carrying coil, current-carrying coil generates the adjustable magnetic field of magnetic field strength, tested protective device is placed in the magnetic field of current-carrying coil generation, when being tested, adjust magnetic field strength, for example increasing magnetic field is to appropriate level or until tested protective device protects failure, the ability of the tolerance magnetic interference of tested protective device is tested, to find the weak spot of tested protective device tolerance magnetic interference.Therefore; the experimental rig generates variable interference magnetic field strength; damped oscillation magnetic field strength can also be increased to the several times of calibrated generator; the truer actual working environment of simulation; make protective device to the interference free performance result more true and accurate of high-intensity magnetic field, solves the problems, such as that experimental test result is not consistent with actual conditions in the prior art.

Description

A kind of adjustable damped oscillation magnetic field experimental rig of intensity
Technical field
The present invention relates to a kind of adjustable damped oscillation magnetic field experimental rigs of intensity.
Background technique
Protective device in electric system is during receiving signal, often by the interference of other electromagnetic signals, This just easily causes erroneous judgement of the system to signal is obtained.Therefore, the researcher of related fields needs to carry out protective device Electromagnetic compatibility testing targetedly takes inhibition and safeguard procedures to grasp the anti-interference ability of protective device, it is ensured that The normal operation of system.
Damp oscillatory wave tests the insulator switch instances in outdoor high, the middle buckling power station of main representative, more particularly to The switching of high voltage bus and the magnetic field harassing and wrecking of commercial plant.It stands outdoors, interferes the frequency of oscillation in magnetic field from 100kHz to several MHz, wherein 100kHz to 1MHz is considered representing majority of case.It is existing when the vulnerability to jamming to protective device is tested The maximum output magnetic field strength of experimental rig be about 100A/m.And in actual working environment, the interference of protective device The frequency of oscillation in magnetic field has been usually more than the maximum output magnetic field strength of existing experimental rig, high-intensity magnetic field from 100kHz to several MHz Low current in interference and coupling to digital signal is even more to have a huge impact to the quality of digital signal.Therefore, when test is wanted When asking raising, the magnetic field strength that existing experimental rig provides is inadequate, moreover, existing experimental rig usually provides fixing intensity Magnetic field still in actual conditions, the magnetic field strength in magnetic field is interfered not to be fixed and invariable, therefore, existing experimental rig is not It can really reflect actual working condition, the uncontrollable of magnetic field strength causes to be not easy to find out protective device confrontation magnetic interference Weak spot, the result in turn resulting in electromagnetic compatibility testing not can solve magnetic field under actual conditions and ask the interference of protective device Topic.
Summary of the invention
The object of the present invention is to provide a kind of adjustable damped oscillation magnetic field experimental rigs of intensity, to solve existing examination The magnetic field strength in magnetic field caused by experiment device cannot really reflect the problem of real work situation.
To achieve the above object, the present invention includes following technical scheme.
A kind of adjustable damped oscillation magnetic field experimental rig of intensity, including damped oscillation magnetic interference generator and current-carrying conductor Circle, the current-carrying coil include a pair of of current terminal, and the output end of the damped oscillation magnetic interference generator is believed by electric current Number line connects the current terminal, and the current-carrying coil generates the adjustable magnetic field of magnetic field strength, and tested protective device is placed on institute In the magnetic field for stating current-carrying coil generation, the magnetic field strength that current-carrying coil generates is adjusted, thus to the tolerance magnetic of tested protective device The ability of field interference is tested.
Damped oscillation magnetic interference generator exports current signal to current-carrying coil, and current-carrying coil generates magnetic field strength can The magnetic field of tune, tested protective device are placed in the magnetic field of current-carrying coil generation, which may be implemented magnetic field strength It adjusts, when being tested, accordingly adjusts magnetic field strength, such as increasing magnetic field according to the actual situation to appropriate level or increasing It is big to protect failure to up to tested protective device, the ability of the tolerance magnetic interference of tested protective device is tested, thus Find the weak spot of tested protective device tolerance magnetic interference.Therefore, which generates variable interference magnetic field strength, also Damped oscillation magnetic field strength can be increased to the several times of existing experimental rig, truer simulation by increasing magnetic field Actual working environment, the test effect made more meets complicated working environment can more paste when generating larger interference The nearly true extreme case in scene makes protective device pair to find the weak spot of tested protective device magnetic field immunity to interference ahead of time The interference free performance result more true and accurate of high-intensity magnetic field solves experimental test result and actual conditions not phase in the prior art The problem of symbol.
Further, the current-carrying coil is the adjustable multiturn current-carrying coil of the number of turns, is adjusted by adjusting the number of turns with realizing Magnetic field strength.
Further, tested protective device is placed on the magnetic field that the current-carrying coil generates by the way of immersion method In.
Further, the experimental rig further includes current surveillance module and current acquisition module, the current acquisition mould Block is arranged on the current-carrying coil, and for acquiring the electric current on current-carrying coil, the current acquisition module is exported described in connection Current surveillance module, for monitoring the current strength on current-carrying coil.
Further, the current-carrying coil is square current-carrying coil.
Further, the current surveillance module is oscillograph, and the current acquisition module is current clamp, and current clamp is clipped in On current-carrying coil, to acquire the electric current on current-carrying coil.
Detailed description of the invention
Fig. 1 is the functional block diagram of damped oscillation magnetic field experimental rig;
Fig. 2 is the circuit interconnect pattern of damped oscillation magnetic field experimental rig.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
The present embodiment provides a kind of adjustable damped oscillation magnetic field experimental rigs of intensity, as shown in Figure 1, including damped oscillation Magnetic interference generator and current-carrying coil, current-carrying coil include a pair of of current terminal, the both ends of current-carrying coil one electricity of each correspondence Terminal is flowed, the current signal output end of damped oscillation magnetic interference generator connects the two current terminals by current signal line Son, damped oscillation magnetic interference generator export current signal to current-carrying coil, and current-carrying coil can generate magnetic field strength can The magnetic field of tune.In the present embodiment, a kind of adjustable implementation of magnetic field strength is provided, current-carrying coil is that the adjustable multiturn of the number of turns carries Streamline circle (i.e. at least two circle current-carrying coils), specific the number of turns is set according to the actual situation, realizes adjusting by adjusting the number of turns Magnetic field strength.Moreover, the electric current of damped oscillation magnetic interference generator output is constant, then, it can by regulating winding the number of turns To adjust damped oscillation magnetic field strength.It certainly, can also be by adjusting current strength or coil as other embodiments Size adjusts damped oscillation magnetic field strength.
Further, multiturn current-carrying coil is rectangular multiturn current-carrying coil, and tested protective device is placed on rectangular multiturn and carries Among the magnetic field that streamline circle generates, i.e., the rectangular multiturn current-carrying coil is arranged in around tested protective device, in the present embodiment, Tested protective device is placed in the magnetic field that rectangular multiturn current-carrying coil generates by the way of immersion method.
The above-mentioned several equipment being related to are specifically introduced below.
Tested protective device: tested protective device is the line protective devices of extra-high voltage, which contains multiple analog, number Signal, vulnerable to electromagnetic interference.
Damped oscillation magnetic interference generator: in the present embodiment, the interferance generator of selection is EM TEST company Cos500n damped oscillation magnetic simulation generator, passes through the damped oscillation magnetic simulation of the exportable 100A/m of standard coupling coil Signal.Damped oscillation magnetic field is simulated high-pressure or the magnetic interference that middle buckling power station generates, and is coupled to power supply line, control line and letter Issuable repeated transition interference phenomenon on number line.The interferance generator is applied on multiturn current-carrying coil, to tested guarantor Protection unit is interfered, to detect tested protective device to the suffertibility of heavy damping oscillating magnetic field interference signal.
Multiturn current-carrying coil: multiturn current-carrying coil is mainly that the current signal that will be sent from interferance generator passes through multiturn line Circle is converted into magnetic field signal and is then applied in tested protective device.Experimental rig is tried using multiturn current-carrying coil immersion method The current signal spread out of from interferance generator is converted magnetic field signal by proved recipe formula, multiturn current-carrying coil, is carried by control multiturn The number of turns of streamline circle and coil size control the intensity of magnetic field signal, by the current-carrying conductor snare adjusted in tested protection dress It sets, bigger magnetic interference signal can be generated, for simulating the damped oscillation magnetic interference signal of the live limit.
In order to work normally tested protective device, a DC power supply is set, which is powered by power supply line Tested protective device is connected, provides direct current for tested protective device, which can be outside rectangular multiturn current-carrying coil Power supply.
The experimental rig further includes current surveillance module and current acquisition module, and current acquisition module is arranged in rectangular multiturn On current-carrying coil, for acquiring the electric current on current-carrying coil, current acquisition module output connection current surveillance module, current surveillance Module receives the collected current signal of current acquisition module, to monitor the current strength on current-carrying coil.It is specific as one Embodiment, current acquisition module is current clamp, and current surveillance module is oscillograph, as shown in Fig. 2, current clamp is clipped in current-carrying On coil, to acquire the electric current on current-carrying coil.Oscillograph is used to monitor the current strength of multiturn current-carrying coil, so as to push away It calculates multiturn current-carrying coil and is coupled to the magnetic field strength in tested protective device, and then judge the limit magnetic field of tested protective device Interfere tolerance.
As shown in Fig. 2, the current terminal of rectangular multiturn current-carrying coil is current terminal N and N ', damped oscillation magnetic field respectively Interferance generator output end connects the two current terminals.Current clamp is clipped on rectangular multiturn current-carrying coil, is arranged on oscillograph There is channel 1, current clamp connects oscillograph by channel 1, to monitor the current strength of multiturn current-carrying coil.
In addition, the positive and negative terminal of DC power supply is connect by power supply line with the positive and negative terminal of tested protective device.DC power supply, quilt Survey protective device and interferance generator altogether.
Test process:
DC power supply is opened, is tested protective device power supply by power supply line, interferance generator sends current signal, passes through Current signal line accesses on multiturn current-carrying coil, and current-carrying coil generates the magnetic field of some strength.It is supervised using current clamp and oscillograph Depending on flowing through the current strength of multiturn current-carrying coil, to extrapolate the magnetic field strength that multiturn current-carrying coil generates in coil.It is logical Multiturn current-carrying coil is overregulated to adjust magnetic field strength, for example increasing magnetic field to appropriate level or is applied to tested protection dress The ability for judging tested protective device tolerance magnetic interference until tested protective device protection failure is set, tested protection is found The weak spot of device tolerance magnetic interference.
Therefore, although each component part in the experimental rig is placed indoors, but it is possible to true outside simulating chamber, Actual working environment.
Interferance generator, multiturn current-carrying coil described above etc. can use other specifications, the type of function of the same race Number product.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in introduction according to the present invention The model of shape, formula, parameter do not need to spend creative work.It is right without departing from the principles and spirit of the present invention The change, modification, replacement and modification that embodiment carries out are still fallen in protection scope of the present invention.

Claims (6)

1. a kind of adjustable damped oscillation magnetic field experimental rig of intensity, which is characterized in that occur including damped oscillation magnetic interference Device and current-carrying coil, the current-carrying coil include a pair of of current terminal, the output end of the damped oscillation magnetic interference generator The current terminal is connected by current signal line, the current-carrying coil generates the adjustable magnetic field of magnetic field strength, is tested protection dress Placement location adjusts the magnetic field strength that current-carrying coil generates in the magnetic field that the current-carrying coil generates, to fill to tested protection The ability for the tolerance magnetic interference set is tested.
2. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1, which is characterized in that the current-carrying conductor Circle is the adjustable multiturn current-carrying coil of the number of turns, by adjusting the number of turns to realize adjusting magnetic field strength.
3. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1 or 2, which is characterized in that using leaching Tested protective device is placed in the magnetic field that the current-carrying coil generates by the mode for entering method.
4. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1 or 2, which is characterized in that the examination Experiment device further includes current surveillance module and current acquisition module, and the current acquisition module is arranged on the current-carrying coil, For acquiring the electric current on current-carrying coil, the current acquisition module output connects the current surveillance module, carries for monitoring Current strength on streamline circle.
5. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1 or 2, which is characterized in that the load Streamline circle is square current-carrying coil.
6. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 4, which is characterized in that the electric current prison Module is regarded as oscillograph, the current acquisition module is current clamp, and current clamp is clipped on current-carrying coil, to acquire on current-carrying coil Electric current.
CN201810983024.1A 2018-08-27 2018-08-27 Damping oscillation magnetic field test device with adjustable strength Active CN109100594B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110988497A (en) * 2019-11-28 2020-04-10 北京赛迪君信电子产品检测实验室有限公司 Magnetic field immunity testing device and method for magnetic coupling digital isolator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050035768A1 (en) * 2002-10-02 2005-02-17 Germano Rabach Method and electromagnetic sensor for measuring partial discharges in windings of electrical devices
CN102103193A (en) * 2010-12-16 2011-06-22 福建水口发电集团有限公司 Device and method for measuring magnetic induction intensity based on colossal magnetoresistance effect
CN102830265A (en) * 2012-09-04 2012-12-19 上海舜宇海逸光电技术有限公司 Current measurement device
CN104700977A (en) * 2015-02-15 2015-06-10 长沙天恒测控技术有限公司 Electric energy meter DC magnetic field generator and interference test device
CN105203892A (en) * 2015-10-30 2015-12-30 江西金程智能科技有限公司 Reed switch characteristic testing method and reed switch characteristic tester

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050035768A1 (en) * 2002-10-02 2005-02-17 Germano Rabach Method and electromagnetic sensor for measuring partial discharges in windings of electrical devices
CN102103193A (en) * 2010-12-16 2011-06-22 福建水口发电集团有限公司 Device and method for measuring magnetic induction intensity based on colossal magnetoresistance effect
CN102830265A (en) * 2012-09-04 2012-12-19 上海舜宇海逸光电技术有限公司 Current measurement device
CN104700977A (en) * 2015-02-15 2015-06-10 长沙天恒测控技术有限公司 Electric energy meter DC magnetic field generator and interference test device
CN105203892A (en) * 2015-10-30 2015-12-30 江西金程智能科技有限公司 Reed switch characteristic testing method and reed switch characteristic tester

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110988497A (en) * 2019-11-28 2020-04-10 北京赛迪君信电子产品检测实验室有限公司 Magnetic field immunity testing device and method for magnetic coupling digital isolator

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