CN103344809A - Measuring equipment and measuring method for leakage currents of high-voltage holding test of security equipment - Google Patents
Measuring equipment and measuring method for leakage currents of high-voltage holding test of security equipment Download PDFInfo
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- CN103344809A CN103344809A CN2013102526816A CN201310252681A CN103344809A CN 103344809 A CN103344809 A CN 103344809A CN 2013102526816 A CN2013102526816 A CN 2013102526816A CN 201310252681 A CN201310252681 A CN 201310252681A CN 103344809 A CN103344809 A CN 103344809A
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Abstract
The invention discloses measuring equipment and a measuring method for leakage currents of a high-voltage holding test of security equipment. The measuring equipment for the leakage currents of the high-voltage holding test of the security equipment comprises a mobile testing platform and a modular current detection alarm device. The modular current detection alarm device is mounted on the mobile testing platform which comprises an insulating support, a high-voltage end, a grounding end and a guide rail ruler. The modular current detection alarm device is in series connection with the grounding end. The measuring method for the leakage currents of the high-voltage holding test of the security equipment comprises the following steps of drawing an equipment wiring diagram, choosing the modular current detection alarm device, manufacturing the mobile testing platform, debugging and mounting and operating measurement. The measuring equipment and the measuring method for the leakage currents of the high-voltage holding test of the security equipment can effectively and accurately measure the leakage currents on the surface of the security equipment, solve the problem that the security equipment is difficult to judge to be qualified or not, and guarantee the personal safety of an operator and the safe and stable operation of a power grid.
Description
Technical field
The present invention relates to electric system leakage current measurement technology, particularly a kind of measurement mechanism and measuring method of managing security tools and instruments withstand voltage test leakage current.
Background technology
Whether whether withstand voltage test will regularly be done to managing security tools and instruments such as insulating ladder, insulating bars by high-potting class, qualified to judge it, can use.This type of managing security tools and instruments is the instrument that guarantees personal safety for the site work personnel of power transformation operation, the inspection of circuit fortune, the inspection of distribution fortune.The withstand voltage test of managing security tools and instruments be the most effective also be the most direct way that can react the managing security tools and instruments dielectric level, so withstand voltage test to the dielectric level of inspection man's utensil to have great importance.Method to the managing security tools and instruments withstand voltage test is that tested managing security tools and instruments is placed on the double ladder at present, the managing security tools and instruments of some is fixedly carried out withstand voltage test together, test the back and touched each position of body, whether generate heat by artificial aware security Work tool, it is qualified to judge whether, and managing security tools and instruments surface in withstand voltage process has small amount of leakage current to pass through, the size of leakage current can't be measured, leakage current has surpassed certain numerical value and has not reached to its heating or the unconspicuous degree of generating heat in withstand voltage process, this moment, the dielectric level of managing security tools and instruments was in the criticality safety state, and artificial sense temperature is subjected to surrounding environment influence, therefore the managing security tools and instruments that partly is in critical dielectric level can not be found from withstand voltage test, simultaneously because the managing security tools and instruments of some is to be fixed on the double ladder to test simultaneously, when the insulation of certain or several managing security tools and instruments has problem, generate heat in the process of the test, also heat can be delivered to adjacent managing security tools and instruments, influence is artificially judged.This operating personnel to frequent use managing security tools and instruments is a kind of potential potential safety hazard.Therefore be necessary prior art is further improved, find a kind of better measurement mechanism and measuring method, can detect the managing security tools and instruments of potential Insulation Problems, thus being perfectly safe of safeguard work personnel.
In the prior art, application number provides a kind of isolated high-voltage leakage current measuring method for 201010172265.1 Chinese invention patent, it connects high-pressure side current measurement module and the low pressure end electric current display module of high-voltage leakage current measurement mechanism with optical fiber, the measurement data of high-pressure side measurement module arrives the low pressure end display module by Optical Fiber Transmission, thereby high-pressure side measurement module and low pressure end display module are isolated; By the Optical Fiber Transmission measurement data, can allow operating personnel away from high-voltage output terminal, the clear measurement data that reads.Application number is the measuring technique that 200810142016.0 Chinese invention patent " measuring method of cable insulation leakage current " relates to cable insulation leakage current, refer more particularly to a kind of method of measuring cable insulation leakage current with the dielectric loss angle tangent method, it adopts the mirror current source measuring technology, be the example explanation with the A current phasor measurement, it is CT1 and CT1 ' that the sensor that will test the A phase current in new method of testing is divided into two parts, on the make allows the current direction of mirror image CT1 ' of CT1 and itself be in symmetry status in advance; Be ICT1=IAG+IAF, ICT1 '=-(IAF+ (2IAG)) and IO=ICT1+ICT1 '=-IAG; By the image current source technology, measure needed electric current composition-IAG (A is the leakage current component relatively), same principle is measured IBG and ICG, its beneficial effect is: direct method is measured each phase leakage current, monitoring mode is realized easily, complementary existing " cable insulation on-line monitoring " detects performance, improved reliability and the accuracy of monitoring system.Application number provides a kind of contactless insulator leakage current sampling method for 201010582627.4 Chinese invention patent, by two model unanimities but the different punching modularization current detecting warning device of placement location obtains two signals, described two signals are formed by leakage current and noise, but ratio difference, separate acquisition and leakage current and the proportional signal of noise according to the independent component analysis method in the blind signal processing, distinguish leakage current signal and noise signal based on adding up of 2 differences before and after the signal, obtain real leakage current signal based on inversion algorithm again, this method accurately obtains the leakage current signal in the insulator, the noncontact sampling that also can keep leakage current simultaneously at the scene under the disturbed condition of intense electromagnetic field.Above prior art all can not be measured managing security tools and instruments surface leakage current and the accurate dielectric level of judging managing security tools and instruments in the withstand voltage test process in real time effectively and accurately.
Summary of the invention
Technical matters solved by the invention provides a kind of measurement mechanism and measuring method of managing security tools and instruments withstand voltage test leakage current, it can measure managing security tools and instruments surface leakage current in the withstand voltage test process in real time effectively and accurately, accurately judges the dielectric level of managing security tools and instruments.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the measurement mechanism of described managing security tools and instruments withstand voltage test leakage current, comprise removable test platform and modularization current detecting warning device, described removable test platform comprises insulating support, high-pressure side, earth terminal and guide rail scale, described high-pressure side, earth terminal are connected on the different insulating supports, and the guide rail scale is connected between the insulating support.Described modularization current detecting warning device is connected on the earth terminal of removable test platform.
Described modularization current detecting warning device is looped around on the downlead of earth terminal of removable test platform, the alarm module that comprises measuring the measurement module of leakage current and be used for sending alerting signal; Described high-pressure side and earth terminal are equipped with to introduce and draw the lead of electric current.Each earth terminal and modularization current detecting warning device form an independently insulation gap, adjacent every pair of earth terminal and modularization current detecting warning device mutual insulating.Removable test platform is provided with the space of placing managing security tools and instruments, and described high-pressure side and earth terminal are equipped with the special anchor clamps that are used for fixing managing security tools and instruments.The quantity of described removable test platform is 2,3 or 4; Distance between the insulating support of mobile platform can be regulated.
The measuring method of described managing security tools and instruments withstand voltage test leakage current adopts above-mentioned managing security tools and instruments withstand voltage test leakage current measurement device to measure, and comprises the steps:
--drawing apparatus wiring diagram: draw above-mentioned managing security tools and instruments withstand voltage test leakage current measurement device wiring diagram;
--select modularization current detecting warning device: the quantity of determining tested managing security tools and instruments, choose modularization current detecting warning device, and be ready to the required other materials of above-mentioned measurement mechanism and comprise guide rail scale, insulating support, high-pressure side, earth terminal and lead;
--make removable test platform: guide rail scale, insulating support, high-pressure side, earth terminal are assembled be made into removable test platform, set the anchor clamps that are used for fixing managing security tools and instruments, reserve the space of placing managing security tools and instruments at removable test platform;
--debugging is installed: the earth terminal at removable test platform is connected in series into the modularization current detecting warning device that has chosen, and debugs installation;
--operating measurement: managing security tools and instruments is placed on the removable test platform, measurement module by modularization current detecting warning device carries out leakage current measurement to managing security tools and instruments, note measurement result, if defective Work tool is arranged, then the alarm module by modularization current detecting warning device sends alerting signal automatically.
When adopting said method to measure, its operating ambient temperature is not more than 80% less than 5 ℃, humidity.
The present invention adopts new measuring method by making special testing experiment instrument, the leakage current of managing security tools and instruments in the withstand voltage test is measured in real time, and differentiated automatically and warning measuring electric current.Employing the present invention can measure the managing security tools and instruments surface leakage current effectively and accurately, has solved to be difficult to accurately judge the whether qualified problem of managing security tools and instruments, has ensured operating personnel's personal safety and power network safety operation.
Description of drawings
Fig. 1 is the structural representation of the measurement mechanism of managing security tools and instruments withstand voltage test leakage current of the present invention;
Fig. 2 is the parts partition structural representation of the measurement mechanism of managing security tools and instruments withstand voltage test leakage current of the present invention;
Fig. 3 measurement module schematic diagram;
Fig. 4 is the alarm module schematic diagram.
Embodiment
As depicted in figs. 1 and 2, the measurement mechanism of described managing security tools and instruments withstand voltage test leakage current, comprise removable test platform 1 and modularization current detecting warning device 2, described removable test platform 1 comprises two insulating supports 3, high-pressure side 4, earth terminal 5 and guide rail scale 6, high-pressure side 4, earth terminal 5 are connected on the different insulating support 3, and guide rail scale 6 is connected between two insulating supports 3.Described modularization current detecting warning device is looped around on the downlead of earth terminal of removable test platform, the alarm module that comprises measuring the measurement module of leakage current and be used for sending alerting signal.
Described high-pressure side and earth terminal are equipped with to introduce and draw the lead of electric current.Each earth terminal and modularization current detecting warning device form an independently insulation gap, adjacent every pair of earth terminal and modularization current detecting warning device mutual insulating.Removable test platform is provided with the space of placing managing security tools and instruments, and described high-pressure side and earth terminal are equipped with the special anchor clamps that are used for fixing managing security tools and instruments.Distance between the insulating support of mobile platform can be regulated.
The measuring method of described managing security tools and instruments withstand voltage test leakage current adopts above-mentioned managing security tools and instruments withstand voltage test leakage current measurement device to measure, and comprises the steps:
--drawing apparatus wiring diagram: draw above-mentioned managing security tools and instruments withstand voltage test leakage current measurement device wiring diagram;
--select modularization current detecting warning device: the quantity of determining tested managing security tools and instruments, choose modularization current detecting warning device, and be ready to the required other materials of above-mentioned measurement mechanism and comprise guide rail scale, insulating support, high-pressure side, earth terminal and lead;
--make removable test platform: guide rail scale, insulating support, high-pressure side, earth terminal are assembled be made into removable test platform, set the anchor clamps that are used for fixing managing security tools and instruments, reserve the space of placing managing security tools and instruments at removable test platform;
--debugging is installed: the earth terminal at removable test platform is connected in series into the modularization current detecting warning device that has chosen, and debugs installation;
--operating measurement: managing security tools and instruments is placed on the removable test platform, measurement module by modularization current detecting warning device carries out leakage current measurement to managing security tools and instruments, note measurement result, if defective Work tool is arranged, then the alarm module by modularization current detecting warning device sends alerting signal automatically.
When adopting said method to measure, its operating ambient temperature is not more than 80% less than 5 ℃, humidity.
As shown in Figure 3, when electric current flow to low-voltage lead, measurement module was started working; Measured current I n flows through the magnetic field that conductor produces, flow through the field compensation that secondary coil produces by the offset current Im by hall element output signal control, when the magnetic field of former limit and secondary reached balance, its offset current Im can accurately reflect primary current In value.
As shown in Figure 4, behind overcommutation, flowed into the direct current signal input end of alarm module by the AC signal after amplifying of measurement module output, triode conducting when the magnetic field that electric current produces makes that the output voltage of Hall element reaches working value after amplifying, electric current passes back into the earth from the reset switch inflow sound light alarming circuit of closure from the secondary coil on the Hall element.This moment, Hall element was subjected to the influence of magnetic field of secondary coil to keep the triode conducting, and the sound and light alarm module is reported to the police always before disconnecting reset switch, can not stop because of stopping of direct current signal input.In the time of guaranteeing like this to take place to puncture outage, the sound and light alarm module can continue the position of location substandard product.After testing crew finds substandard product, disconnect reset switch then circuit return to original state.Specially designed the self-test switch of single-pole double-throw (SPDT) at signal input part in order to ensure alarm module 100% action message when measuring.When self-test switch was got to the self check position, the energising of signal input line circle produces magnetic field made Hall element move, and triode conducting sound light alarming circuit is started working.If do not observe alerting signal then prove that this module is defective this moment, change the new module test.Place test specimen at anchor clamps during test and adjust spacing, sub-bond switching is got to test position, the reset switch closure.Apply trial voltage at high-pressure side, this moment, modularization current detecting warning device began to monitor the Leakage Current of low pressure end outflow.Not reporting to the police during off-test, then test product is qualified, otherwise test product is defective.Repeating this process finishes until all test product detections.
When adopting said method to measure, its operating ambient temperature is not more than 80% less than 5 ℃, humidity.
Be the concrete practical measuring examples that adopts the present invention to carry out below.
Experiment hall is prepared 35 managing security tools and instruments, comprise 10 brand-new, 15 in the past test passes with 10 determine underproof.Because removable test platform has been arranged, the Work tool that carries out does not exist and influences each other simultaneously, can can measure simultaneously the leakage current of each managing security tools and instruments by modularization current detecting warning device again in real time, can judge accurately whether leakage current values exceeds standard, artificial temperature-sensitive is judged in addition, can guarantee accurately to judge whether managing security tools and instruments is qualified.In test, 10 underproof insulating bar leakage currents obviously exceed standard and generate heat obviously, are considered as defective Work tool.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all be included within protection scope of the present invention.
Claims (6)
1. the measurement mechanism of a managing security tools and instruments withstand voltage test leakage current, it is characterized in that, comprise removable test platform (1) and modularization current detecting warning device (2), described removable test platform (1) comprises insulating support (3), high-pressure side (4), earth terminal (5) and guide rail scale (6), described high-pressure side (4), earth terminal (5) are connected on the different insulating support (3), and guide rail scale (6) is connected between the insulating support (3); Described modularization current detecting warning device (2) is connected on the earth terminal (5) of removable test platform (1).
2. the measurement mechanism of managing security tools and instruments withstand voltage test leakage current according to claim 1, it is characterized in that, described modularization current detecting warning device (2) is looped around on the downlead of earth terminal (5) of removable test platform (1), the alarm module that comprises measuring the measurement module of leakage current and be used for sending alerting signal; Each earth terminal (5) forms an independently insulation gap, adjacent every pair of earth terminal (5) and modularization current detecting warning device (2) mutual insulating with modularization current detecting warning device (2).
3. the measurement mechanism of managing security tools and instruments withstand voltage test leakage current according to claim 1, it is characterized in that, removable test platform (1) is provided with the space of placing managing security tools and instruments, and described high-pressure side (4) and earth terminal (5) are equipped with the special anchor clamps that are used for fixing managing security tools and instruments.
4. the measurement mechanism of managing security tools and instruments withstand voltage test leakage current according to claim 1 is characterized in that, the quantity of described removable test platform (1) is 2,3 or 4; Distance between the insulating support of mobile platform (3) can be regulated.
5. the measuring method of a managing security tools and instruments withstand voltage test leakage current adopts the described managing security tools and instruments withstand voltage test of claim 1 leakage current measurement device to measure, and comprises the steps:
--drawing apparatus wiring diagram: draw the described managing security tools and instruments withstand voltage test of claim 1 leakage current measurement device wiring diagram;
--select modularization current detecting warning device: the quantity of determining tested managing security tools and instruments, choose modularization current detecting warning device, and be ready to the required other materials of above-mentioned measurement mechanism and comprise guide rail scale, insulating support, high-pressure side, earth terminal and lead;
--make removable test platform: guide rail scale, insulating support, high-pressure side, earth terminal are assembled be made into removable test platform, set the anchor clamps that are used for fixing managing security tools and instruments, reserve the space of placing managing security tools and instruments at removable test platform;
--debugging is installed: the earth terminal at removable test platform is connected in series into the modularization current detecting warning device that has chosen, and debugs installation;
--operating measurement: managing security tools and instruments is placed on the removable test platform, measurement module by modularization current detecting warning device carries out leakage current measurement to managing security tools and instruments, note measurement result, if defective Work tool is arranged, then the alarm module by modularization current detecting warning device sends alerting signal automatically.
6. the measuring method of managing security tools and instruments withstand voltage test leakage current according to claim 5 is characterized in that, the operating ambient temperature during measurement is not more than 80% less than 5 ℃, humidity.
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Cited By (11)
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| CN103529369A (en) * | 2013-10-29 | 2014-01-22 | 国网河南省电力公司漯河供电公司 | Pressure-resistant detection device of safety tool |
| CN103713165A (en) * | 2013-12-31 | 2014-04-09 | 国家电网公司 | Support for insulating rod withstand voltage testing |
| CN103901326A (en) * | 2013-10-29 | 2014-07-02 | 国网河南省电力公司漯河供电公司 | Automatic withstand voltage detecting and automatic sorting device of safety equipment |
| CN104035014A (en) * | 2014-06-12 | 2014-09-10 | 国家电网公司 | Method for alternating-current voltage withstand testing of 220 kV and 330 kV insulated tools and instruments |
| CN104730425A (en) * | 2013-12-18 | 2015-06-24 | 国家电网公司 | Insulating rod performance detection device |
| CN109633347A (en) * | 2018-12-04 | 2019-04-16 | 国家电网有限公司 | A kind of insulating tool defect detection platform and detection method |
| CN110333380A (en) * | 2019-06-21 | 2019-10-15 | 国家电网有限公司 | Ground electrode circuit live-working safety detection device |
| CN110703140A (en) * | 2013-11-19 | 2020-01-17 | 李铉昌 | Mobile leakage detection device and method |
| CN112198402A (en) * | 2020-10-09 | 2021-01-08 | 广东电网有限责任公司佛山供电局 | Insulating tool testing device and method |
| CN112598317A (en) * | 2020-12-30 | 2021-04-02 | 国网四川省电力公司电力科学研究院 | Real-time state evaluation method for safety tool |
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| CN109633347A (en) * | 2018-12-04 | 2019-04-16 | 国家电网有限公司 | A kind of insulating tool defect detection platform and detection method |
| CN110333380A (en) * | 2019-06-21 | 2019-10-15 | 国家电网有限公司 | Ground electrode circuit live-working safety detection device |
| CN112198402A (en) * | 2020-10-09 | 2021-01-08 | 广东电网有限责任公司佛山供电局 | Insulating tool testing device and method |
| CN112598317A (en) * | 2020-12-30 | 2021-04-02 | 国网四川省电力公司电力科学研究院 | Real-time state evaluation method for safety tool |
| CN113533920A (en) * | 2021-09-13 | 2021-10-22 | 广东电网有限责任公司中山供电局 | Automatic withstand voltage test device and method for insulating partition plate |
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