CN105445632A - Insulation breakdown detection device and method - Google Patents
Insulation breakdown detection device and method Download PDFInfo
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- CN105445632A CN105445632A CN201510980293.9A CN201510980293A CN105445632A CN 105445632 A CN105445632 A CN 105445632A CN 201510980293 A CN201510980293 A CN 201510980293A CN 105445632 A CN105445632 A CN 105445632A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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Abstract
The invention relates to an insulation breakdown detection device and method. The insulation breakdown detection device includes one or more optical signal transmitting modules, one or more optical signal receiving modules and a result indication module. The method includes the following steps that: the optical signal transmitting modules convert electrical signals in a high voltage test loop into optical signals and transmit the optical signals; the optical signals transmitted by the optical signal transmitting modules are transmitted to the optical signal receiving modules through optical fibers which are connected with the optical signal receiving modules and corresponding optical signal transmitting modules; and the optical signals transmitted by the optical signal transmitting modules are received and converted into electrical signals through the optical signal receiving modules. According to the insulation breakdown detection device and method of the invention, strong current signals in the high voltage test loop are converted into weak current signals through the optical signal transmitting modules, the weak current signals are transmitted to the result indication module through the optical fibers, and the result indication module displays the signals in a preset display form, and therefore, an inexperienced operator can also complete an insulation breakdown test of a tested product, and thus, requirements for test operation personnel can be lowered.
Description
Technical field
The present invention relates to detection technique field, be specifically related to a kind of insulation breakdown pick-up unit and method.
Background technology
During grid equipment is safeguarded, the state of insulation of the Work tools such as the personal safety of operating personnel and insulating tool used, managing security tools and instruments is closely bound up.According to regulations stipulate, this type of instrument regularly should carry out Insulation Test, once there is the defective phenomenons such as insulation ag(e)ing, should be eliminated immediately, to avoid the generation of latent defect.
Prior art is the leakage current table output test result by series connection.As Chinese patent literature CN201622320U discloses a kind of electric testing device of insulating safety tools, comprise leakage current table, test article loading device, testing transformer, control box, leakage current table is connected in high-potting loop, whether qualified by the registration determination test article reading leakage current table.
But need the registration manually reading leakage current table to determine test findings in such scheme, operating process is more loaded down with trivial details, require higher to the skills and experience of operating personnel; In addition, such scheme be not suitable for the test findings exporting batch testing product.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome in prior art and requires higher, not to be suitable for the test of batch testing product defect to the skills and experience of test operation personnel, thus provides a kind of insulation breakdown pick-up unit and method.
Insulation breakdown pick-up unit provided by the invention, comprises one or more optical emitting module, one or more optical signal receiving module and result indicating module, and described optical signal receiving module is the signal receiving module corresponding with described optical emitting module;
Described optical emitting module is connected in high-potting loop, for the electric signal in described high-potting loop is converted to light signal and sends;
Described optical signal receiving module is connected with corresponding described optical emitting module by optical fiber, for receiving the light signal that described optical emitting module sends, and converts the light signal that described optical emitting module sends to electric signal;
Described result indicating module is connected with described optical signal receiving module, for receiving the electric signal that described optical signal receiving module exports, and according to the net result that the electric signal display that each described optical signal receiving module exports is tested.
Preferably, described optical emitting module comprises current transformer and optical signal transmitter;
The input end of described current transformer connects described high-potting loop, is connected with described optical signal transmitter between the positive pole of the output terminal of described current transformer and negative pole; When there being leakage current in described high-potting loop, described optical signal transmitter receives induction current corresponding to described leakage current, and converts induction current corresponding for described leakage current to light signal and send.
Preferably, between the positive pole and negative pole of the output terminal of described current transformer, also fly-wheel diode is connected with.
Preferably, the anode of described optical signal transmitter is connected by the negative electrode of current-limiting resistance with described fly-wheel diode, and the negative electrode of described optical signal transmitter is connected with the anode of described fly-wheel diode.
Preferably, described optical signal receiving module comprises optical receiver and d type flip flop;
Described optical receiver receives the light signal that described optical emitting module sends, and converts the light signal that described optical emitting module sends to electric signal; Described d type flip flop receives the electric signal that described optical receiver exports, and the pulse signal in the electric signal exported by described optical receiver converts high level output to.
Preferably, described result indicating module comprises programmable chip, operational amplifier and signal lamp;
The electric signal that described programmable chip exports for receiving each described optical signal receiving module, and the drive singal of described signal lamp is exported according to predetermined display format; Described operational amplifier receives the drive singal of the described signal lamp that described programmable chip exports, and after the amplification of the drive singal of the described signal lamp that described programmable chip is exported, be input to the positive pole of described signal lamp, drive described signal lamp to show.
Insulation breakdown detection method provided by the invention, comprises the steps:
By the one or more described optical emitting module be connected in high-potting loop, the electric signal in described high-potting loop is converted to light signal and sends;
By connecting the described optical fiber of described optical emitting module and corresponding described Optical Receivers, the optical signal transmission sent by described optical emitting module is to described optical signal receiving module;
Received the light signal of described optical emitting module transmission by described optical signal receiving module, and convert the light signal that described optical emitting module sends to electric signal;
The electric signal of described optical signal receiving module output is received by described result indicating module, and according to the net result that the electric signal display that each described optical signal receiving module exports is tested.
Preferably, describedly by the described optical emitting module be connected in described high-potting loop, the electric signal in described high-potting loop converted to light signal and send, comprising:
When there is leakage current in high-potting loop, described optical signal transmitter is made to receive induction current corresponding to described leakage current by described current transformer;
Convert induction current corresponding for described leakage current to light signal by described optical transmitting set and send.
Preferably, the described light signal being received the transmission of described optical emitting module by described optical signal receiving module, and convert the light signal that described optical emitting module sends to electric signal, comprising:
Received the light signal of described optical emitting module transmission by described optical receiver, and convert the light signal that described optical emitting module sends to electric signal;
Received the electric signal of described optical receiver output by described d type flip flop, and the pulse signal in the electric signal exported by described optical receiver converts high level output to.
Preferably, the described electric signal being received the output of described optical signal receiving module by described result indicating module, and according to the net result that the electric signal display that described optical signal receiving module exports is tested, comprising:
Received the electric signal of each described optical signal receiving module output by described programmable chip, and export the drive singal of described signal lamp according to predetermined display format;
The drive singal of the described signal lamp that described programmable chip exports is received by described operational amplifier, and after the amplification of the drive singal of the described signal lamp that described programmable chip is exported, be input to the positive pole of described signal lamp, drive described signal lamp to show.
Compared with prior art, the present invention has following beneficial effect:
(1) insulation breakdown pick-up unit of the present invention, comprise one or more signal emission module, one or more optical signal receiving module and result indicating module, wherein, electric signal in described high-potting loop is converted to light signal and sends by optical emitting module, optical signal receiving module receives and converts light signal to electric signal, the net result of the electric signal display test that result indicating module exports according to optical signal receiving module.In the program, by optical emitting module the heavy current signal in high-potting circuit converted to weak current signal and be transmitted through the fiber to result indicating module and show with predetermined display format, make unfamiliar operating personnel also can complete the insulation breakdown detection experiment of product to be tested, reduce the requirement to test operation personnel.
(2) insulation breakdown pick-up unit of the present invention, described optical emitting module comprises current transformer and optical signal transmitter, the current parameters in high-potting loop is obtained by the current transformer be connected in high-potting loop, achieve the decoupling zero in result display circuit and high-potting loop, make the current parameters in high-potting loop not by the impact of result display circuit situation, enhance the stability in high-potting loop.
(3) insulation breakdown pick-up unit of the present invention, current signal in high-potting loop is by the transmission of light signal sending module, optical fiber and optical signal receiving module, make signal transmission not by electromagnetic interference (EMI), improve stability and the accuracy of display result.
(4) insulation breakdown pick-up unit of the present invention; also fly-wheel diode is connected with, by protecting optical signal transmitter can not be excessive and damage due to the output induction current of current transformer with the fly-wheel diode of optical signal transmitter reverse parallel connection between the positive pole and negative pole of the output terminal of described current transformer.
(5) insulation breakdown pick-up unit of the present invention, described result indicating module comprises programmable chip, operational amplifier and signal lamp.By adopting programmable chip, can by test findings with multiple different predetermined display format displays such as the flicker of dot matrix, word, image or signal lamp or the flicker frequencys, enriched the form of test findings display, the experimenter being convenient to lack experience learns test findings; In addition, employing programmable chip can show the result that product to be tested in enormous quantities is tested simultaneously simultaneously, also reduces the quantity of circuit components, makes circuit layout more regular.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Figure 1A is the theory diagram of a concrete example of insulation breakdown pick-up unit in the embodiment of the present invention 1;
Figure 1B is the theory diagram of the optical emitting module of insulation breakdown pick-up unit in the embodiment of the present invention 1;
Fig. 1 C is the theory diagram of the optical signal receiving module of insulation breakdown pick-up unit in the embodiment of the present invention 1;
Fig. 1 D is the theory diagram of the result indicating module of insulation breakdown pick-up unit in the embodiment of the present invention 1;
Fig. 2 is the process flow diagram of a concrete example of insulation breakdown detection method in the embodiment of the present invention 1.
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can also be the connection of two element internals, can be wireless connections, also can be wired connection.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In addition, if below in the described different embodiment of the present invention involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment 1
Originally execute example and a kind of insulation breakdown pick-up unit is provided, as shown in Figure 1A, comprise one or more optical emitting module 10, one or more optical signal receiving module 20 and result indicating module 30.Optical signal receiving module 20 is the signal receiving module corresponding with optical emitting module 10, and therefore, signal receiving module 20 is identical with the quantity of optical emitting module 10.Result indicating module 30 can, display module that quantity identical corresponding with optical signal receiving module 20, also can quantity different, the output terminal as multiple optical signal receiving module 20 is all connected to same result indicating module 30.
Optical emitting module 10 is connected in high-potting loop, for converting the electric signal in high-potting loop to light signal and sending; Optical signal receiving module 20 is connected with corresponding optical emitting module 10 by optical fiber, for the light signal that receiving optical signals transmitter module 10 sends, and converts the light signal that optical emitting module 10 sends to electric signal; Result indicating module 30 is connected with optical signal receiving module 20, for the electric signal that receiving optical signals receiver module 20 exports, and according to the net result that the electric signal display that each optical signal receiving module 20 exports is tested.
Optical emitting module 10, as shown in Figure 1B, comprises current transformer 11 and optical signal transmitter 14; The input end of current transformer 11 connects high-potting loop, is connected with optical signal transmitter 14 between the positive pole of the output terminal of current transformer 11 and negative pole.When product to be tested insulation breakdown, there will be in high-potting loop increase suddenly Leakage Current, when there being leakage current in high-potting loop, optical signal transmitter 14 receives induction current corresponding to leakage current, and converts induction current corresponding for leakage current to light signal and send.
Above-mentioned insulation breakdown pick-up unit, the current parameters in high-potting loop is obtained by the current transformer be connected in high-potting loop, achieve the decoupling zero in result display circuit and high-potting loop, make the current parameters in high-potting loop not by the impact of result display circuit situation, enhance the stability in high-potting loop; Convert current parameters to optical signal transmission by light signal sending module and optical signal receiving module, make signal transmission not by electromagnetic interference (EMI), improve stability and the accuracy of display result.
As preferred scheme, between the positive pole and negative pole of the output terminal of current transformer 11, be also connected with fly-wheel diode 12.The anode of optical signal transmitter 14 is connected with the negative electrode of fly-wheel diode 12 by current-limiting resistance 13, and the negative electrode of optical signal transmitter 14 is connected with the anode of fly-wheel diode 12.When the output terminal of current transformer 11 exports the electric current flowed to as shown in Figure 1B, fly-wheel diode 12 oppositely ends, and electric current flows through current-limiting resistance 13 and optical transmitting set 14, makes optical signal transmitter 14 send light signal; When the electric current that the output terminal of current transformer 11 exports is contrary with the direction of current shown in Figure 1B, fly-wheel diode 12 conducting, electric current flows through this branch road, damages optical signal transmitter 14 to prevent the output induction current of current transformer 111 excessive.
Optical signal receiving module 20, as shown in Figure 1 C, comprises optical receiver 21 and d type flip flop 22; The light signal that optical receiver 21 receiving optical signals transmitter module 10 sends, and convert the light signal that optical emitting module 10 sends to electric signal; D type flip flop 22 receives the electric signal that optical receiver 21 exports, and the pulse signal in the electric signal exported by optical receiver 21 converts high level output to.Here d type flip flop can also replace with the electron device that pulse signal is converted to high level output by other.
Result indicating module 30, comprises programmable chip and signal lamp, the electric signal that programmable chip exports for receiving each optical signal receiving module 20, and the drive singal outputing signal pilot lamp according to predetermined display format.Signal lamp is connected to the output terminal of programmable chip, this programmable chip can be single-chip microcomputer or CPLD (ComplexProgrammableLogicDevice, CPLD) etc. programming device, can by test findings with form displays such as the flicker of dot matrix, word, image or signal lamp or the flicker frequencys, the experimenter being convenient to lack experience learns test findings.
This result indicating module 30, as shown in figure ip, also comprise operational amplifier 31, receive the drive singal of the signal lamp that programmable chip exports, and after the drive singal amplification of the signal lamp that programmable chip is exported, be input to the positive pole of signal lamp 32, drive singal pilot lamp shows; Or the input end of direct operational amplifier 31 directly connects the output terminal of optical signal receiving module 20, the output signal drive singal pilot lamp 32 according to optical signal receiving module 20 shows.
By adopting programmable chip in result indicating module, can by test findings with multiple different predetermined display format displays such as the flicker of dot matrix, word, image or signal lamp or the flicker frequencys, enriched the form of test findings display, the experimenter being convenient to lack experience learns test findings; In addition, employing programmable chip can show the result that product to be tested in enormous quantities is tested simultaneously simultaneously, also reduces the quantity of circuit components, makes circuit layout more regular.
The insulation breakdown pick-up unit that the present embodiment provides, by optical emitting module the heavy current signal in high-potting circuit converted to weak current signal and be transmitted through the fiber to result indicating module and show with predetermined display format, make unfamiliar operating personnel also can complete the insulation breakdown detection experiment of product to be tested, reduce the requirement to test operation personnel.
Embodiment 2
Present embodiments provide a kind of insulation breakdown detection method using above-mentioned insulation breakdown device, as shown in Figure 1B, comprise the steps:
Step S1: convert the electric signal in high-potting loop to light signal by being connected on one or more optical emitting module in high-potting loop and sending.This step comprises following two steps:
Step S11: when there is leakage current in high-potting loop, makes described optical signal transmitter receive induction current corresponding to described leakage current by described current transformer.
Step S12: convert induction current corresponding for described leakage current to light signal by described optical transmitting set and send.
Step S2: by the described optical fiber of connection optical emitting module with corresponding Optical Receivers, the optical signal transmission sent by optical emitting module is to optical signal receiving module.
Step S3: the light signal sent by optical signal receiving module receiving optical signals transmitter module, and convert the light signal that optical emitting module sends to electric signal.This step comprises following two steps:
Step S31: the light signal being received the transmission of described optical emitting module by described optical receiver, and convert the light signal that described optical emitting module sends to electric signal.
Step S32: the electric signal being received the output of described optical receiver by described d type flip flop, and the pulse signal in the electric signal exported by described optical receiver converts high level output to.
Above-mentioned steps S1 is to step S3, the current parameters in high-potting loop is obtained by the current transformer be connected in high-potting loop, achieve the decoupling zero in result display circuit and high-potting loop, make the current parameters in high-potting loop not by the impact of result display circuit situation, enhance the stability in high-potting loop; Convert current parameters to optical signal transmission by light signal sending module and optical signal receiving module, make signal transmission not by electromagnetic interference (EMI), improve stability and the accuracy of display result.
Step S4: the electric signal exported by result indicating module receiving optical signals receiver module, and according to the net result that the electric signal display that each optical signal receiving module exports is tested.This step comprises following two steps:
Step S41: the electric signal being received each described optical signal receiving module output by described programmable chip, and the drive singal of described signal lamp is exported according to predetermined display format.This predetermined display format comprises test findings with form displays such as the flicker of dot matrix, word, image or signal lamp or the flicker frequencys.
Step S42: the drive singal being received the described signal lamp that described programmable chip exports by described operational amplifier, and after the amplification of the drive singal of the described signal lamp that described programmable chip is exported, be input to the positive pole of described signal lamp, drive described signal lamp to show.
Above-mentioned steps S4, by adopting programmable chip in result indicating module, can by test findings with multiple different predetermined display format displays such as the flicker of dot matrix, word, image or signal lamp or the flicker frequencys, enriched the form of test findings display, the experimenter being convenient to lack experience learns test findings; In addition, employing programmable chip can show the result that product to be tested in enormous quantities is tested simultaneously simultaneously, also reduces the quantity of circuit components, makes circuit layout more regular.
In addition, the method also comprises: by protecting optical signal transmitter can not be excessive and damage due to the output induction current of current transformer with the fly-wheel diode of optical signal transmitter reverse parallel connection.
The insulation breakdown detection method that the present embodiment provides, by optical emitting module the heavy current signal in high-potting circuit converted to weak current signal and be transmitted through the fiber to result indicating module and show with predetermined display format, make unfamiliar operating personnel also can complete the insulation breakdown detection experiment of product to be tested, reduce the requirement to test operation personnel.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. an insulation breakdown pick-up unit, it is characterized in that, described device comprises one or more optical emitting module, one or more optical signal receiving module and result indicating module, and described optical signal receiving module is the signal receiving module corresponding with described optical emitting module;
Described optical emitting module is connected in high-potting loop, for the electric signal in described high-potting loop is converted to light signal and sends;
Described optical signal receiving module is connected with corresponding described optical emitting module by optical fiber, for receiving the light signal that described optical emitting module sends, and converts the light signal that described optical emitting module sends to electric signal;
Described result indicating module is connected with described optical signal receiving module, for receiving the electric signal that described optical signal receiving module exports, and according to the net result that the electric signal display that each described optical signal receiving module exports is tested.
2. insulation breakdown pick-up unit according to claim 1, is characterized in that, described optical emitting module comprises current transformer and optical signal transmitter;
The input end of described current transformer connects described high-potting loop, is connected with described optical signal transmitter between the positive pole of the output terminal of described current transformer and negative pole; When there being leakage current in described high-potting loop, described optical signal transmitter receives induction current corresponding to described leakage current, and converts induction current corresponding for described leakage current to light signal and send.
3. insulation breakdown pick-up unit according to claim 2, is characterized in that, between the positive pole and negative pole of the output terminal of described current transformer, be also connected with fly-wheel diode.
4. insulation breakdown pick-up unit according to claim 3, it is characterized in that, the anode of described optical signal transmitter is connected by the negative electrode of current-limiting resistance with described fly-wheel diode, and the negative electrode of described optical signal transmitter is connected with the anode of described fly-wheel diode.
5. insulation breakdown pick-up unit according to claim 1, is characterized in that, described optical signal receiving module comprises optical receiver and d type flip flop;
Described optical receiver receives the light signal that described optical emitting module sends, and converts the light signal that described optical emitting module sends to electric signal; Described d type flip flop receives the electric signal that described optical receiver exports, and the pulse signal in the electric signal exported by described optical receiver converts high level output to.
6. insulation breakdown pick-up unit according to claim 1, is characterized in that, described result indicating module comprises programmable chip, operational amplifier and signal lamp;
The electric signal that described programmable chip exports for receiving each described optical signal receiving module, and the drive singal of described signal lamp is exported according to predetermined display format; Described operational amplifier receives the drive singal of the described signal lamp that described programmable chip exports, and after the amplification of the drive singal of the described signal lamp that described programmable chip is exported, be input to the positive pole of described signal lamp, drive described signal lamp to show.
7. use an insulation breakdown detection method for the arbitrary described insulation breakdown pick-up unit of claim 1-6, it is characterized in that, described method comprises the steps:
By the one or more described optical emitting module be connected in high-potting loop, the electric signal in described high-potting loop is converted to light signal and sends;
By connecting the described optical fiber of described optical emitting module and corresponding described Optical Receivers, the optical signal transmission sent by described optical emitting module is to described optical signal receiving module;
Received the light signal of described optical emitting module transmission by described optical signal receiving module, and convert the light signal that described optical emitting module sends to electric signal;
The electric signal of described optical signal receiving module output is received by described result indicating module, and according to the net result that the electric signal display that each described optical signal receiving module exports is tested.
8. insulation breakdown detection method according to claim 7, is characterized in that, describedly by the described optical emitting module be connected in described high-potting loop, the electric signal in described high-potting loop is converted to light signal and sends, and comprising:
When there is leakage current in high-potting loop, described optical signal transmitter is made to receive induction current corresponding to described leakage current by described current transformer;
Convert induction current corresponding for described leakage current to light signal by described optical transmitting set and send.
9. insulation breakdown detection method according to claim 7, it is characterized in that, the described light signal being received the transmission of described optical emitting module by described optical signal receiving module, and convert the light signal that described optical emitting module sends to electric signal, comprising:
Received the light signal of described optical emitting module transmission by described optical receiver, and convert the light signal that described optical emitting module sends to electric signal;
Received the electric signal of described optical receiver output by described d type flip flop, and the pulse signal in the electric signal exported by described optical receiver converts high level output to.
10. insulation breakdown detection method according to claim 7, it is characterized in that, the described electric signal being received the output of described optical signal receiving module by described result indicating module, and according to the net result that the electric signal display that described optical signal receiving module exports is tested, comprising:
Received the electric signal of each described optical signal receiving module output by described programmable chip, and export the drive singal of described signal lamp according to predetermined display format;
The drive singal of the described signal lamp that described programmable chip exports is received by described operational amplifier, and after the amplification of the drive singal of the described signal lamp that described programmable chip is exported, be input to the positive pole of described signal lamp, drive described signal lamp to show.
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| CN201510980293.9A CN105445632A (en) | 2015-12-23 | 2015-12-23 | Insulation breakdown detection device and method |
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Application publication date: 20160330 |
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