CN211826326U - Test system for simulating multiple lightning strokes - Google Patents
Test system for simulating multiple lightning strokes Download PDFInfo
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- CN211826326U CN211826326U CN202020297617.5U CN202020297617U CN211826326U CN 211826326 U CN211826326 U CN 211826326U CN 202020297617 U CN202020297617 U CN 202020297617U CN 211826326 U CN211826326 U CN 211826326U
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Abstract
The utility model discloses a simulation multiple thunderbolt test system belongs to thunderbolt test field, test system includes control cabinet, a plurality of simulation thunderbolt generator and test article platform, the control cabinet is connected with simulation thunderbolt generator through optic fibre, and simulation thunderbolt generator's output sets up on the test article platform, and simulation thunderbolt generator is impulse voltage generator or impulse current generator the utility model discloses multiple thunderbolt simulation test can simulate multiple thunderbolt intensive discharge process many times, and the lightning protection effect of present all kinds of lightning protection devices under multiple thunderbolt operating mode is reflected in true test, and the power electronic drive device action interval time of adoption can reach the mu s level, can satisfy many times back stroke interval time requirement completely, and the experimentation is comparatively simple, has maneuverability and feasibility.
Description
Technical Field
The utility model relates to a thunderbolt test field especially relates to a simulation multiple thunderbolt test system.
Background
The lightning protection device is an effective lightning protection measure which is adopted on a large number of power transmission lines, and due to the reasons of large installation quantity, wide distribution range and the like, the service life assessment, test method and operation and maintenance scheme are always difficult problems for operation and maintenance, state evaluation and asset management of domestic and foreign power systems. Running experience at home and abroad shows that lightning stroke is the most main reason for the failure of the lightning protection device of the power transmission line, and the characteristic of the lightning protection device under the actual lightning current impact is the key problem in the aspects of running state evaluation, test method, protection effect, matching mode and the like. Lightning observation at home and abroad shows that more than 80% of lightning strokes are multiple lightning strokes, and the test method and the equipment considering multiple lightning stroke current impact tolerance in the current lightning protection device test standards at home and abroad can only carry out single-pulse simulation.
The current test method can only carry out single-pulse simulation, the minimum time interval of repeated tests is 10s, which is far longer than the time interval of actual multiple lightning strokes, and the accumulation of electric power and heat effect caused by the actual multiple lightning strokes cannot be simulated. Since the impact current has an accumulative effect on the lightning protection device (such as a lightning arrester), multiple current impacts with the interval time of ms or even mu s are obviously much more severe than single current impacts, so that some lightning protection devices which pass single impact current tests often suffer impact aging damage in practical use, the purpose of overvoltage protection cannot be achieved, and even system accidents are caused by self faults. A test method for simulating multiple lightning strokes is provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a test method of simulation multiple thunderbolt to solve the problem that exists among the background art.
The utility model provides a simulation multiple lightning stroke test system, includes control cabinet, a plurality of simulation thunderbolt generator and test article platform, the control cabinet is connected with simulation thunderbolt generator through optic fibre, and simulation thunderbolt generator's output sets up on the test article bench, and simulation thunderbolt generator is impulse voltage generator or impulse current generator.
Further, the impulse current generator comprises a first transformer, a silicon stack, a protection resistor, an equivalent capacitor, a first spherical gap, an inductor, a resistor, a shunt, a voltage dividing capacitor, a first digital oscilloscope and a first relay, wherein the input end of the first transformer is connected with a mains supply, the anode of the output end is connected with one end of the protection resistor through the silicon stack, the other end of the protection resistor is connected with the anode of the equivalent capacitor and the first relay, the cathode of the equivalent capacitor is grounded, the output end of the first relay is connected with one end of the resistor through the first spherical gap and the inductor, the other end of the resistor is connected with one end of a tested article, the other end of the tested article is grounded, one end of the shunt is connected with the cathode of the output end of the first transformer, the other end of the shunt is grounded, the voltage dividing capacitor is connected to the tested article in parallel, the voltage dividing capacitor is composed of two capacitors, the first digital oscilloscope is connected between the two capacitors.
Furthermore, the impulse voltage generator comprises a second transformer, a second relay, a current-limiting resistor, a measuring resistor, an insulator, a second spherical gap, a second digital oscilloscope, a discharge gap, an impulse voltage generator, a third relay and a fourth relay, wherein the positive electrode of the output end of the second transformer is connected with one end of the second spherical gap and one end of the current-limiting resistor through the second relay, the other end of the second spherical gap is grounded, one end of the current-limiting resistor is connected with one end of the insulator and one end of a tested article, one end of the discharge gap is connected with the other end of the insulator, the other end of the discharge gap is arranged at the bottom of the tested article, the gap is formed, one end of the measuring resistor is connected with the negative electrode of the output end of the second transformer, the other end of the measuring resistor is grounded, the second digital oscilloscope is connected with the measuring resistor in parallel, and the impulse voltage generator is connected with the third relay, and connect in parallel on the insulator, the fourth relay sets up the commercial power input at impulse voltage generator, second relay, third relay and fourth relay all are connected with the control cabinet.
The multiple lightning stroke refers to a plurality of discharging processes generated in one lightning stroke, and in order to simulate the discharging processes of a plurality of lightning pulses, a plurality of impulse current/voltage generators are designed to intensively discharge to the same tested object and the same point. The time interval between multiple back strikes in multiple lightning strokes is very short, usually in the order of ms or even mus. Therefore, a power electronic driving device is designed in a control circuit of the console, the driving interval time of the power electronic driving device can reach the level of mu s, and the multiple lightning stroke interval time can be completely simulated.
Setting 3-5 impact current/voltage generators to simulate 3-5 times of back shock, and discharging to the tested object in sequence. The first impulse current/voltage generator firstly acts to discharge to the tested object, and then is driven and controlled by the power electronic driving device, so that the second impulse current/voltage generator again flows through the tested object after the interval of tens of microseconds, and the subsequent process is the same as the above. Therefore, the working condition that multiple lightning strikes build arcs for multiple times in one discharging process is simulated.
The generating loop of a single impulse current generator mainly comprises the following components: the device comprises a transformer, a silicon stack, a protective resistor, an equivalent capacitor, an ignition ball gap, an inductor, a resistor, a tested object, a current divider, a voltage dividing capacitor and a digital oscilloscope. The charging loop is composed of a transformer, a silicon stack, a protective resistor and an equivalent capacitor; the main discharge loop is composed of an ignition ball gap, an inductor, a resistor, a tested object, a current divider, a voltage division capacitor, a digital oscilloscope and the like. And voltage-dividing capacitors connected in parallel at two ends of the tested object and the digital oscilloscope collect the voltage waveform of the electric arc.
The test loop of a single impulse voltage generator mainly comprises the following components: transformer, relay, current-limiting resistor, ball gap, insulator, tested object, impulse voltage generator, measuring resistor and digital oscilloscope. The tested object is connected in parallel with two ends of the insulator string, the lightning arc flashover at the tested object, and the digital oscilloscope collects the voltage waveform of the arc.
The test steps are as follows: the control console firstly sets the lightning current/voltage waveform to be simulated and the peak value thereof, sends a first signal through the optical fiber to enable the charging power supply of the first impulse current/voltage generator to start charging, and enables the lightning current to flow through the tested object through the main discharging loop. And after a time interval of tens of microseconds, a second signal is sent to enable the charging power supply of the second impact current/voltage generator to start charging through the driving control of the console power electronic driving device, and impact discharge is also completed through the loop. The following several procedures are as above. And analyzing the measured arc voltage waveform, and researching the lightning protection effect of various lightning protection devices under the multiple lightning stroke working condition.
The utility model adopts the above technical scheme, the utility model discloses following technological effect has:
the utility model discloses multiple thunderbolt analogue test can simulate multiple thunderbolt intensive discharge process many times, and true test reflects the lightning protection effect of present all kinds of lightning protection devices under multiple thunderbolt operating mode, and the power electronic drive device action interval time of adoption can reach the mu s level, can satisfy the interval time requirement of striking back many times completely, and the experimentation is comparatively simple, has maneuverability and feasibility.
Drawings
FIG. 1 is a schematic diagram of a multiple surge current/voltage generator simulation multiple lightning strike platform.
Fig. 2 is a test loop diagram of a single impulse current generator.
FIG. 3 is a circuit diagram of a single surge voltage generator test.
Description of the drawings: the device comprises an A-console, a B-optical fiber, a C-analog lightning stroke generator, a D-test bench, 1-a first transformer, a 2-silicon stack, 3-a protective resistor, 4-an equivalent capacitor, 5-a first spherical gap, 6-an inductor, 7-a resistor, 8-a tested object, 9-a shunt, 10-a voltage-dividing capacitor, 11-a first digital oscilloscope, 12-a first relay, 13-a second transformer, 14-a second relay, 15-a current-limiting resistor, 16-a measuring resistor, 17-an insulator, 18-a second spherical gap, 19-a second digital oscilloscope, 20-a discharge gap, 21-a surge voltage generator, 22-a third relay and 23-a fourth relay.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, preferred embodiments are described in detail. It should be understood, however, that the numerous specific details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in fig. 1-3, the utility model relates to a simulation multiple thunderbolt test process, the process includes following step:
step 1: set up control cabinet A, a plurality of simulation thunderbolt generator C and sample platform D, control cabinet A is connected with simulation thunderbolt generator C through optic fibre B, and simulation thunderbolt generator C's output sets up on sample platform D.
The number of the simulated lightning stroke generators C is 3-5, and the simulated lightning stroke generators C are impulse voltage generators or impulse current generators.
When the simulated lightning strike generator C is an impulse current generator, the impulse current generator comprises a first transformer 1, a silicon stack 2, a protection resistor 3, an equivalent capacitor 4, a first spherical gap 5, an inductor 6, a resistor 7, a shunt 9, a voltage division capacitor 10, a first digital oscilloscope 11 and a first relay 12, wherein the input end of the first transformer 1 is connected with a mains supply, the positive electrode of the output end is connected with one end of the protection resistor 3 through the silicon stack 2, the other end of the protection resistor 3 is connected with the positive electrode of the equivalent capacitor 4 and the first relay 12, the negative electrode of the equivalent capacitor 4 is grounded, the output end of the first relay 12 is connected with one end of the resistor 7 through the first spherical gap 5 and the inductor 6, the other end of the resistor 7 is connected with one end of a tested object 8, the other end of the tested object 8 is grounded, one end of the shunt 9 is connected with the negative electrode of the output end of the first transformer, the other end is grounded, the voltage division capacitor 10 is connected to the tested object 8 in parallel, and the first digital oscilloscope 11 is connected to the voltage division capacitor 10. The voltage division capacitor 10 is composed of two capacitors which are connected in series, and the first digital oscilloscope 11 is connected between the two capacitors.
When the simulated lightning stroke generator C is an impulse voltage generator, the impulse voltage generator comprises a second transformer 13, a second relay 14, a current-limiting resistor 15, a measuring resistor 16, an insulator 17, a second spherical gap 18, a second digital oscilloscope 19, a discharge gap 20, an impulse voltage generator 21, a third relay 22 and a fourth relay 23, wherein the positive electrode of the output end of the second transformer 13 is connected with one end of the second spherical gap 18 and one end of the current-limiting resistor 15 through the second relay 14, the other end of the second spherical gap 18 is grounded, one end of the current-limiting resistor 15 is connected with one end of the insulator 17 and one end of the tested object 8, one end of the discharge gap 20 is connected with the other end of the insulator 17, the other end is arranged at the bottom of the tested object 8, the gap is arranged, one end of the measuring resistor 16 is connected with the negative electrode of the output end of the second transformer 13, the other end of the second digital oscilloscope 19 is grounded, the second digital oscilloscope 19 is connected in parallel with the measuring resistor 16, the impulse voltage generator 21 and the third relay 22 are connected in series and are connected in parallel to the insulator 17, the fourth relay 23 is arranged at the mains supply input end of the impulse voltage generator 21, and the second relay 14, the third relay 22 and the fourth relay 23 are all connected with the console a.
The console A comprises an optical fiber card and a controller, and the controller is connected with the optical fiber B through the optical fiber card. The junction of the first transformer 1 and the mains supply is provided with a charging relay, and the charging relay and the first relay 12 are both connected with the console A.
Step 2: the peak values of voltage and current needed to simulate the lightning stroke experiment are set on the console A, and the console A transmits peak value control signals to a plurality of simulated lightning stroke generators C through the optical fibers B.
And step 3: the control console A controls the plurality of simulated lightning stroke generators C to charge, and after charging is finished, the control console A sequentially controls the plurality of simulated lightning stroke generators C to perform lightning strokes on the tested object 8;
and 4, step 4: the discharge interval between the simulated lightning stroke generator C and the simulated lightning stroke generator C is 10-100 microseconds, and an oscilloscope is used for collecting voltage waveforms for analysis, so that the lightning protection effect of each lightning protection device under the condition of multiple lightning strokes is achieved.
The utility model provides a simulation multiple lightning stroke test system, as shown in figure 1, includes control cabinet A, a plurality of simulation thunderbolt generator C and test article platform D, control cabinet A is connected with simulation thunderbolt generator C through optic fibre B, and simulation thunderbolt generator C's output sets up on test article platform D, and simulation thunderbolt generator C is impulse voltage generator or impulse current generator.
As shown in figure 1, a power electronic driving device is designed in a control circuit of a console A, the driving interval time of the power electronic driving device can reach the level of mu s, and multiple lightning stroke interval times can be completely simulated. In the embodiment, three impulse current/voltage generators are arranged to simulate three return shocks and sequentially discharge electricity to the tested object. The control console firstly sets the waveform and peak value of lightning current/voltage to be simulated, sends a first signal through the optical fiber to enable the charging power supply of the No. 1 impulse current/voltage generator to start charging, and enables the lightning current to flow through a tested object through the main discharging loop. Through the driving control of the console power electronic driving device, after the time interval of dozens of microseconds, a second signal is sent to enable the No. 2 surge current/voltage generator charging power supply to start charging, and surge discharging is also completed through the loop. The procedure is then as above. Therefore, the working condition that multiple lightning strikes build arcs for multiple times in one discharging process is simulated.
As shown in fig. 2, the impulse current generator includes a first transformer 1, a silicon stack 2, a protection resistor 3, an equivalent capacitor 4, a first spherical gap 5, an inductor 6, a resistor 7, a shunt 9, a voltage dividing capacitor 10, a first digital oscilloscope 11 and a first relay 12, an input end of the first transformer 1 is connected to a mains supply, an anode of an output end is connected to one end of the protection resistor 3 through the silicon stack 2, the other end of the protection resistor 3 is connected to an anode of the equivalent capacitor 4 and the first relay 12, a cathode of the equivalent capacitor 4 is grounded, an output end of the first relay 12 is connected to one end of the resistor 7 through the first spherical gap 5 and the inductor 6, the other end of the resistor 7 is connected to one end of a tested article 8, the other end of the tested article 8 is grounded, one end of the shunt 9 is connected to a cathode of an output end of the first transformer 1, the other end is grounded, the voltage dividing capacitor 10 is connected to the tested article 8 in, the voltage division capacitor 10 is composed of two capacitors which are connected in series, and the first digital oscilloscope 11 is connected between the two capacitors. The charging loop is composed of a first transformer 1, a silicon stack 2, a protective resistor 3 and an equivalent capacitor 4; the main discharge circuit is composed of a first spherical gap 5, an inductor 6, a resistor 7, a shunt 9, a voltage division capacitor 10, a first digital oscilloscope 11, a first relay 12 and the like. The voltage-dividing capacitor 10 and the first digital oscilloscope 11 which are connected in parallel at two ends of the tested object 8 collect the voltage waveform of the electric arc.
As shown in fig. 3, the impulse voltage generator includes a second transformer 13, a second relay 14, a current limiting resistor 15, a measuring resistor 16, an insulator 17, a second spherical gap 18, a second digital oscilloscope 19, a discharge gap 20, an impulse voltage generator 21, a third relay 22 and a fourth relay 23, an anode of an output end of the second transformer 13 is connected with one end of the second spherical gap 18 and one end of the current limiting resistor 15 through the second relay 14, the other end of the second spherical gap 18 is grounded, one end of the current limiting resistor 15 is connected with one end of the insulator 17 and one end of the tested object 8, one end of the discharge gap 20 is connected with the other end of the insulator 17, the other end of the discharge gap is arranged at the bottom of the tested object 8, and a gap is arranged, one end of the measuring resistor 16 is connected with a cathode of the output end of the second transformer 13, the other end of the measuring resistor is grounded, the second digital oscilloscope 19 is connected with the measuring resistor 16 in parallel, impulse voltage generator 21 and third relay 22 series connection, and connect in parallel on insulator 17, fourth relay 23 sets up the commercial power input at impulse voltage generator 21, second relay 14, third relay 22 and fourth relay 23 all are connected with control cabinet A. The tested object is connected in parallel with two ends of the insulator string, the lightning arc flashover at the tested object, and the digital oscilloscope collects the voltage waveform of the arc. The tested object 8 is various lightning protection devices and is used for verifying the lightning protection effect of the lightning protection device in an experiment, and the oscilloscope is used for carrying out experiment analysis on the voltage waveform and the specific image condition of flashover of lightning stroke collected by the camera, so that the lightning protection performance of the lightning protection device is obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides a simulation multiple lightning stroke test system which characterized in that: including control cabinet (A), a plurality of simulation thunderbolt generator (C) and test article platform (D), control cabinet (A) is connected with simulation thunderbolt generator (C) through optic fibre (B), and the output setting of simulation thunderbolt generator (C) is on test article platform (D), and simulation thunderbolt generator (C) is impulse voltage generator or impulse current generator.
2. A simulated multiple lightning strike testing system according to claim 1, characterized in that: the impulse current generator comprises a first transformer (1), a silicon stack (2), a protection resistor (3), an equivalent capacitor (4), a first spherical gap (5), an inductor (6), a resistor (7), a shunt (9), a voltage dividing capacitor (10), a first digital oscilloscope (11) and a first relay (12), wherein the input end of the first transformer (1) is connected with a mains supply, the positive electrode of the output end is connected with one end of the protection resistor (3) through the silicon stack (2), the other end of the protection resistor (3) is connected with the positive electrode of the equivalent capacitor (4) and the first relay (12), the negative electrode of the equivalent capacitor (4) is grounded, the output end of the first relay (12) is connected with one end of the resistor (7) through the first spherical gap (5) and the inductor (6), the other end of the resistor (7) is connected with one end of a tested article (8), and the other end of the tested article (8) is grounded, one end of the current divider (9) is connected with the negative electrode of the output end of the first transformer (1), the other end of the current divider is grounded, the voltage division capacitor (10) is connected to the tested object (8) in parallel, the voltage division capacitor (10) is composed of two capacitors, the two capacitors are connected in series, and the first digital oscilloscope (11) is connected between the two capacitors.
3. A simulated multiple lightning strike testing system according to claim 1, characterized in that: the impulse voltage generator comprises a second transformer (13), a second relay (14), a current-limiting resistor (15), a measuring resistor (16), an insulator (17), a second spherical gap (18), a second digital oscilloscope (19), a discharge gap (20), an impulse voltage generator (21), a third relay (22) and a fourth relay (23), wherein the positive electrode of the output end of the second transformer (13) is connected with one end of the second spherical gap (18) and one end of the current-limiting resistor (15) through the second relay (14), the other end of the second spherical gap (18) is grounded, one end of the current-limiting resistor (15) is connected with one end of the insulator (17) and one end of a tested article (8), one end of the discharge gap (20) is connected with the other end of the insulator (17), the other end of the discharge gap is arranged at the bottom of the tested article (8), and gaps are arranged, one end of the measuring resistor (16) is connected with the negative electrode of the output end of the second transformer (13), the other end of the measuring resistor is grounded, the second digital oscilloscope (19) is connected with the measuring resistor (16) in parallel, the impulse voltage generator (21) is connected with the third relay (22) in series and is connected on the insulator (17) in parallel, the fourth relay (23) is arranged at the commercial power input end of the impulse voltage generator (21), and the second relay (14), the third relay (22) and the fourth relay (23) are all connected with the console (A).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112578204A (en) * | 2020-12-02 | 2021-03-30 | 国网浙江省电力有限公司电力科学研究院 | Lightning protection true type test system for power distribution network and multi-space-time scale dynamic evaluation method |
| CN112666428A (en) * | 2020-12-02 | 2021-04-16 | 西安交通大学 | Vacuum gap-based lightning arrester operation simulation test system |
| CN112798853A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN112904117A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Lightning arrester aging test evaluation system and method considering air temperature and multiple lightning strikes |
| CN113917268A (en) * | 2021-10-19 | 2022-01-11 | 中国电信股份有限公司 | Simulation lightning voltage generator and automatic reclosing lightning protection capability testing device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112578204A (en) * | 2020-12-02 | 2021-03-30 | 国网浙江省电力有限公司电力科学研究院 | Lightning protection true type test system for power distribution network and multi-space-time scale dynamic evaluation method |
| CN112666428A (en) * | 2020-12-02 | 2021-04-16 | 西安交通大学 | Vacuum gap-based lightning arrester operation simulation test system |
| CN112578204B (en) * | 2020-12-02 | 2022-05-31 | 国网浙江省电力有限公司电力科学研究院 | Lightning protection true type test system for power distribution network and multi-space-time scale dynamic evaluation method |
| CN112798853A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN112798853B (en) * | 2020-12-28 | 2022-05-27 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN112904117A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Lightning arrester aging test evaluation system and method considering air temperature and multiple lightning strikes |
| CN112904117B (en) * | 2021-01-20 | 2022-04-05 | 云南电网有限责任公司电力科学研究院 | Lightning arrester aging test evaluation system and method considering air temperature and multiple lightning strikes |
| CN113917268A (en) * | 2021-10-19 | 2022-01-11 | 中国电信股份有限公司 | Simulation lightning voltage generator and automatic reclosing lightning protection capability testing device |
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