CN105319407B - Double-loop impact generator - Google Patents
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Abstract
A double-loop impact generator comprises a charging device, a body energy storage device, a triggering system device, a double-loop discharging ball gap, a wave modulation network device, a test article table and a measurement control analysis system; the body energy storage device comprises a capacitor and a protection resistor; each capacitor is provided with a protective resistor, the capacitors are low-inductance capacitors and are vertically arranged, the combined arrangement mode adopts fan-shaped arrangement, and the structure is movable; the trigger system device comprises a trigger button, a high-voltage pulse interference resisting trigger device and a synchronous or asynchronous adjusting device; the trigger system device is actuated after being actuated by the button, so that the spherical gap is ignited, and the double-loop ignition can be synchronously or asynchronously ignited. Through the establishment of the double-loop impact generator, a high-level comprehensive test platform is provided for the development and the test of a new lightning protection technology, the technical research level of the lightning protection industry can be promoted, and scientific and technological support is provided for the research and development of various new materials, new structures and new devices.
Description
Technical Field
The invention relates to signal remote control, long-line transmission of electronic equipment and simulation test equipment of a double-loop impulse generator in the field of lightning protection high-voltage pulse of a lightning protection component, in particular to a double-loop impulse generator.
Background
In recent years, the proportion distribution of lightning disaster accidents is changed, and the lightning disaster accident proportion distribution is mainly characterized in that a signal system and electronic equipment are influenced seriously, the lightning disaster is from point to point, the related range is wider, the lightning loss is increased continuously, and the defects and the laggard behind of the existing lightning protection technology are highlighted. At present, after a plurality of products in the domestic lightning protection industry are installed in a system, the situations of protection failure, transmission obstacle and even larger accidents caused by fire are frequent, the aim of lightning protection is not achieved, and negative effects are caused to the development of the lightning protection industry.
The reason is that at present, in domestic, whether components or complete machine tests are carried out, the tests are mainly carried out only through-current, and according to the IEEE587-1980 standard, the real environment is simulated through the tests of double-wave voltage waves and the like, and besides the energy matching of lightning protection products, the test of the lightning protection technology is further closer to the real lightning stroke discharge process, so that the lightning protection industry is a more reliable means for researching.
Through the establishment of the double-loop impact generator, a high-level comprehensive test platform is provided for the development and the test of a new lightning protection technology, the technical research level of the lightning protection industry can be promoted, and the test support is provided for the research and development of various new materials, new structures and new devices.
In order to make the laboratory test work better, it is necessary to make it closer to the real environment from the test method and the test conditions. Through producing test condition and the test method that simulation nature thunder and lightning is more close to reality in laboratory environment, research lightning protection technique is examined current lightning protection device, and the perfect test data of record provides reliable data and data for research lightning disaster, development lightning protection new technology. The research on the occurrence and action mechanism of lightning and the improvement of the lightning protection technical level are one of the targets pursued in the field of lightning testing and research.
Disclosure of Invention
The invention aims to design a novel double-loop impact generator to solve the problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a double-loop impact generator comprises a charging device, a body energy storage device, a triggering system device, a double-loop discharging ball gap, a wave modulation network device, a test article table and a measurement control analysis system;
the charging device comprises an insulating cylinder oil-immersed charging transformer, a silicon controlled rectifier control high-voltage rectifier silicon stack, a grounding device and a polarity rotation and movable base;
the body energy storage device comprises a capacitor and a protection resistor; each capacitor is provided with a protective resistor, the capacitors are low-inductance capacitors and are vertically arranged, the combined arrangement mode adopts fan-shaped arrangement, and the structure is movable;
the trigger system device comprises a trigger button, a high-voltage pulse interference resisting trigger device and a synchronous or asynchronous adjusting device; the triggering system device is actuated after being actuated by the button, so that the spherical gap is ignited, and the double loops can ignite synchronously or asynchronously;
the double-loop discharging ball gap comprises a matched linear motor, a silencing device and two sets of discharging frames; the dual-loop discharge sphere gap discharge mode is synchronous discharge or asynchronous discharge; the motor automatically adjusts a discharge ball gap;
the wave regulating network device adopts the non-inductive winding of a nickel-chromium resistance band, and can randomly regulate voltage waves, current waves and complex waves; after triggering discharge, outputting a required arbitrary waveform through a wave modulation network;
the test table uses a transformer and a voltage regulator, can be simultaneously connected to two transmission lines or two SPD test articles through a decoupling device, and can also select single-path output; an organic glass protective cover is added on the table top of the test table, a residual voltage divider is included, and all paths of measured voltage and current are output to the panel through a BNC by adopting a double-core shielding wire;
the measurement control analysis system part comprises an automatic control triggering system and a measurement analysis system;
the automatic control triggering system comprises a color liquid crystal touch screen, a control button/switch, a PLC, a control device and an execution unit;
the measurement and analysis system comprises an industrial personal computer, an oscilloscope, a Pearson coil, a residual voltage divider, a touch screen and a PLC control system.
The charging device is a double-loop output and integral structure; the bridge rectifier is installed inside the insulating cylinder oil-immersed charging transformer, and the two sleeves of the insulating cylinder oil-immersed charging transformer are connected to the capacitor in two paths through 2 protective resistors; the silicon controlled rectifier controls the automatic positive and negative polarity conversion of the high-voltage silicon rectifier stack and the charging protection resistor is arranged in the box body of the insulating cylinder oil-immersed charging transformer and integrally arranged on a movable charging trolley; the series-parallel resistor is installed in a resistor box externally hung on the insulating cylinder oil-immersed charging transformer, 2 cooling fans are additionally installed on the resistor box, and cooling holes are formed in the top of the resistor box.
Each capacitor is assembled on a movable chassis, and 4 steering wheels are installed at the bottom of the chassis; when the energy storage loop is triggered by the trigger system, the energy storage capacitor discharges, and the waveform which is randomly selected according to the standard can be output through the wave modulation unit.
The two sets of discharge frames respectively contain a Wu-Cu alloy discharge ball, and are simultaneously arranged on a movable chassis, and the discharge balls are controlled by adopting three-gap pulses; the ball gap trigger adopts three-gap pulse ignition; the discharge ball gap is adjusted by adopting a linear motor, and the adjustable precision is 0.1 mm; the ball gap is provided with the silencing device.
The bottom of the measurement and analysis system is provided with four movable steering wheels, and the outer wheels of the steering wheels are not more than 20 mm; the measurement signal is connected to the test cabinet by a double shielded coaxial cable.
The Chinese name of SPD in the invention: a surge protector.
BNC is known collectively as Bayonet Nut Connector (the name visually describes the Connector profile), also known as British Naval Connector.
Nowadays, technology is different day by day, because the electromagnetic interference 'burr' of kilovolt level can often be produced to various data transmission to thunder and lightning overvoltage and operation overvoltage, damage components and parts even cause the complete machine accident of breaking down takes place occasionally. Therefore, the artificial lightning generated by the impact generator is used for checking the working states of the electronic components and the whole machine under the normal working environment, the basis is provided for reasonably selecting the lightning protection device, and the safety of the data transmission system is greatly guaranteed. Most of the current impact generators in the market are single-path impact generators, and only product tests can be carried out under a static test.
Considering that signal equipment generally adopts double-wire and multi-wire transmission (no matter a power supply channel or a track) in actual work, induced lightning stroke cannot be only on one wire, based on the consideration that a railway science research institute and Shanghai crown drawing lightning protection technology company are cooperated to develop a double-loop impact generator, according to the principle that the thinner and more complete indoor test is, the safer field application is, and the less faults are, aiming at the paths, the speed and the energy of the lightning to the signal equipment and different design circuits, elements of the signal equipment at the easily-invaded inlet are selected, and the thinner indoor simulation test is, the closer to the reality of the environment is, the fewer or even no faults can be generated in field application.
In order to make the lightning protection industry of China more standard, clamp voltage must be measured when a lightning simulation test is carried out on weak current equipment protectors under the dynamic operation of the whole machine, and a basis is provided for formulating the standard of protection circuit products. The double-loop impact generator aims at the whole machine in the transmission process, the influence of resistance value change on the waveform in the impact process is prevented, the double-loop fine protection waveform and the amplitude comprise different currents and different voltages, the double-loop fine protection waveform and the amplitude can be measured by a measurement and control analysis system, and the type of fine protection of the whole machine is selected according to residual pressure of an impact test in the dynamic operation of transmission equipment. (e.g. if the fine protection is determined solely on the basis of the residual pressure of the impact test carried out with the transport apparatus in a static state, sometimes with the apparatus running normally in the way)
Therefore, the invention integrates the charging device, the double-loop discharging device and the measurement and control analysis system, is applied to a long-line transmission lightning protection system, realizes the simultaneous output of lightning waveforms by the double loops, can also carry out the test of lightning protection components such as a tripolar discharge tube and the like, and fills the blank of the double-loop impact generating device at home and abroad.
The invention aims to design a novel double-loop impact generator to solve the problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the dual circuit impulse generator includes (1) a charging device portion; (2) a body energy storage device; (3) a trigger system device; (4) a dual-circuit discharge device; (5) a wave-tuning network device; (6) a test table; (7) a measurement control analysis system;
the double-loop impact generator must solve the key technologies of charging safety, synchronous trigger control, asynchronous delay trigger control, double-loop discharge technology, various waveform generation and regulation and the like. Wherein prevention of high voltage pulse interference in trigger control is a difficult point and important point.
Dual circuit impulse generator component parts:
the device is a set of impact test generator integrating impact voltage, impact current, combined wave and double loops, and comprises a charging device, a body energy storage device, a triggering system device, a double-loop discharging ball gap, a wave adjusting network device, a test article table and a measurement control analysis system.
The charging device section includes: the insulating cylinder oil-immersed charging transformer comprises a silicon controlled rectifier control high-voltage rectifier silicon stack, a polarity conversion, a movable base and a grounding device.
The advantages are that: and the power supply system is voltage-stabilized and safely isolated.
The principle is as follows: the charging device is in a double-loop output structure, the bridge rectifier is installed inside the oil immersed transformer, and the two bushings of the transformer are connected to the capacitor in two paths through 2 protective resistors; the high-voltage silicon stack positive and negative polarity automatic conversion and charging protection resistor is arranged in a box body of a transformer, is integrally arranged on a movable charging trolley, is arranged in a resistor box externally hung on the transformer, is additionally provided with 2 cooling fans and is provided with heat dissipation holes at the top.
The body energy storage device includes: capacitor, protection resistance.
The advantages are that: each capacitor is provided with a protective resistor to ensure charging balance, the capacitors (low-inductance capacitors) are vertically arranged, the combined arrangement mode adopts fan-shaped arrangement, the structure is made into a movable type, each capacitor is assembled on a movable chassis, and the bottom of the chassis is provided with 4 steering wheels to facilitate integral movement.
The principle is as follows: when the energy storage loop is triggered by the trigger system, the energy storage capacitor discharges, and the waveform which is randomly selected according to the standard can be output through the wave modulation unit.
The triggering system device comprises: trigger button, anti high-voltage pulse interference trigger device, synchronous or asynchronous adjusting device.
The advantages are that: under the high-voltage interference resistant state, the zero-error double-loop synchronous triggering or the free adjustment of asynchronous triggering time can be realized according to the requirement setting.
The principle is as follows: after the button acts, the trigger system device acts to ignite the spherical gap, and the double loops can ignite synchronously or asynchronously.
The dual-loop discharge ball gap includes: two sets of discharging racks; a matched linear motor; a silencing device.
The advantages are that: discharge mode: the discharge can be synchronous or asynchronous (during double-loop type test, the discharge can be triggered synchronously, and the discharge can be triggered asynchronously after one path of delay); the motor automatically adjusts the discharge ball gap, and is safe and convenient; an isolation silencing device is added to minimize the discharging noise.
The principle is as follows: the two discharge frames respectively comprise a discharge spherical surface of the Wu-Cu alloy and are simultaneously arranged on a movable chassis, and the discharge ball is controlled by three-gap pulses; the ball gap trigger adopts three-gap pulse ignition; the impact resistance and high current resistance are strong; the discharge ball gap adjustment adopts a linear motor, the adjustable precision is 0.1mm, the action range is large, and the reliability is good; the ball gap is added with an isolation silencing device, so that the discharging noise is reduced to the minimum.
Wave modulation network device
The advantages are that: the non-inductive winding of Ni-Cr resistor band can regulate various wave forms, such as voltage wave, current wave and composite wave.
The principle is as follows: and outputting the required arbitrary waveform through a wave modulation network after triggering discharge.
Test table
The advantages are that: the transformer and the voltage regulator can be simultaneously connected to 2 transmission lines or 2 SPD test articles through a decoupling device, and single-path output can be selected; the organic glass protection casing is added to the test article desktop, both can observe the condition when the test article impact test, can prevent again that the test article occasionally explodes the unnecessary injury that arouses when the impact test.
The principle is as follows: the test cover uses organic glass cover, and the residual voltage divider includes, and each way measurement voltage, electric current adopt two core shielded wires to export to the panel through BNC.
The measurement control analysis system part comprises: the automatic control trigger system and the measurement analysis system; the automatic control trigger unit comprises a color liquid crystal touch screen, a control button/switch, a PLC (programmable logic controller), a control device, an execution unit and other standard configuration devices, the measurement and analysis system comprises an industrial personal computer, an oscilloscope, a Pearson coil, a self-made residual voltage divider and measurement and analysis software, the touch screen, the PLC control system and test data display, analysis and processing; the bottom is provided with 4 movable steering wheels, and the outer wheels of the steering wheels are not more than 20 mm.
The advantages are that: an operator can complete all control functions including voltage setting, charging, grounding, fault resetting, automatic switching of discharge positive and negative polarities, triggering, direct-current voltage display, state display, discharge times, discharge intervals, discharge voltage and the like through visual and convenient operation on the touch screen; automatic protection is provided for power failure; the safety door is arranged for protecting the personal safety in the test area; the measurement signal is connected to the test cabinet by a double shielded coaxial cable.
The principle is as follows: the double-loop impact generating device can realize the testing function by depending on a more advanced measurement analysis control software system. In the process of designing and constructing the generating system, an expert analysis system based on a PLC, an industrial personal computer and an oscilloscope is established by adopting intelligent design, and a strong soft environment is provided for test analysis.
The working principle is as follows:
the generator principle is lightning protection experiment impact generator, simulating lightning voltage and simulating lightning current
Static test of the complete machine (single loop impact test):
transverse impact: when the A end of the transmission equipment is subjected to high voltage, the B end needs to be grounded; when the end B is subjected to high voltage, the end A is grounded; as shown in fig. 8
Longitudinal impact: when the A, B ends of the transmission equipment are short-circuited, the high voltage is applied, and the ground is high-voltage (one end of the high-voltage generator is required to be grounded when the high-voltage generator is used for performing a shock test); as shown in fig. 9
(1) Dynamic test of the complete machine (double-loop impact test):
when the lightning protection measures are added at the A, B two ends of the tested equipment, and the equipment is started to work normally, and high-voltage impact is applied to check that the lightning protection effect is closer to real. As shown in fig. 10:
(2) the whole machine dynamic test of the long-line transmission equipment:
and the long-line transmission equipment performs a complete machine dynamic impact test after lightning protection measures are added and under the normal operation condition. As shown in fig. 11:
the technical effects are as follows:
the clamping voltage of each level of protection measured by normal operation of the transmission equipment under the condition of simulating lightning stroke is formulated to develop a product standard, so that the following test waveforms can be selected for testing at first.
Large current impact test waveform:
impact current waveform capable of generating double-loop various amplitude values
(1) Outputting 8 +/-10% of mu s/20 +/-10% of mu s, (5 kA-120 kA) +/-10% of impact current waves;
(2) double-loop triggering: controllable trigger delay;
(3) the power frequency Uc can be superposed, the nominal current capacity of the power supply is more than or equal to 5A, the phase angle of the Uc is adjustable (matched with an action load test)
(4) Output 1.2 +/-30% mu s/50 +/-20% mu s, (4 kV-30 kV) +/-3% impact voltage wave
(1) outputting 4 plus or minus 30% mu s/300 plus or minus 20% mu s, (3 kV-20 kV) + -10% impact voltage wave
(2) Outputting 10 plus or minus 30% mu s/200 plus or minus 20% mu s, (3 kV-20 kV) + -10% impact voltage wave
(3) Outputs 10 plus or minus 30% mu s/700 plus or minus 20% mu s, (3kV to 20kV) + -3% impact voltage wave
(4) The single-loop impact current output of 10 plus or minus 30% mu s/1000 plus or minus 20% mu s and 20A to 200A is output
(1) outputting 8 plus or minus 10% mu s/20 plus or minus 10% mu s, (0.5 kA-5 kA) + -10% impact current wave
(2) Output 1.2 +/-30% mu s/50 +/-20% mu s, (0.5 kV-5 kV) +/-3% impact voltage wave
(3) Outputting 4 plus or minus 30% mu s/300 plus or minus 20% mu s, (0.5 kV-4 kV) + -10% impact voltage wave
(4) Outputting 10 plus or minus 30% mu s/200 plus or minus 20% mu s, (0.5 kV-4 kV) + -10% impact voltage wave
(5) Outputting 10 plus or minus 30% mu s/700 plus or minus 20% mu s, (0.5 kV-4 kV) + -3% impact voltage wave
(1) short-circuit current output is 8 +/-10% mu s/20 +/-10% mu s, (0.25 kA-10 kA) +/-10%;
the open-circuit voltage outputs 1.2 +/-30% mu s/50 +/-20% mu s, (0.5 kV-20 kV) +/-3% impact voltage wave;
(2) short-circuit current output is 5 +/-20% mu s/300 +/-20% mu s, (12.5-125A) +/-10%;
the open-circuit voltage outputs 10 +/-30% mu s/700 +/-20% mu s, (0.5 kV-5 kV) +/-3% of impact voltage wave;
(3) the double-loop discharge current can be controlled in a delayed mode for 1-100 mu s, and two paths of pulses are sent out simultaneously according to a prescription device;
the advantages and the characteristics are as follows:
the double-loop impact generator can simulate longitudinal and transverse impact tests of various lightning waves with different amplitudes under the normal operation of transmission equipment, so that the defect of single-loop impact is overcome;
double-circuit impact generator triggering mode: the method can be synchronous or asynchronous (synchronous triggering can be realized during double-loop type test, and asynchronous triggering can be realized by adding delay to one path);
the two paths of the double-loop impact generator can discharge independently or in parallel (can generate a single-path composite wave or a double-loop composite wave);
wave modulation unit of double-loop impact generator: the waveform can be arbitrarily selected according to the standard;
dual-circuit impulse generator test subjects: the lightning protection device can be used for testing a lightning protection element and a lightning protection device, and can also be used for carrying out a complete machine dynamic test;
dynamic transmission of the double-loop impact generator: the single loop can independently use voltage waves or current waves, and the double loops can be synchronously and asynchronously triggered;
automatic polarity switching of the dual-circuit impulse generator: the polarity of the motor is automatically changed, so that positive and negative polarity tests can be conveniently carried out on each test piece, and the motor is safe and convenient;
the beneficial effects of the invention can be summarized as follows:
(1) the invention integrates impulse voltage, impulse current, composite wave, double loop or single loop into one impulse test generator;
(2) in terms of dual-loop fine protection: the waveform and amplitude (including voltage and current) of the burr leaked to the transmission equipment by the pre-stage protection after the impact are different can be measured by a storage oscilloscope and then a model selection basis is provided according to an actual test result;
(3) the double-loop impact generator is specially designed for lightning protection of a signal system and electronic equipment, has a modular structure, and has important significance on the development of a lightning protection technology;
(4) by establishing the double-loop impact generator, a high-level comprehensive test platform is provided for the development and test of new lightning protection technologies, the technical research level of the lightning protection industry can be promoted, and scientific and technological support is provided for the research and development of various new materials, new structures and new devices;
(5) the lightning stroke process which is closer to the lightning stroke in the natural world is generated in the laboratory environment, double-loop impact current (which can be synchronously or asynchronously triggered) can be output, the effects such as the thermal effect, the force effect and the electromagnetic effect generated by the lightning stroke are observed, the lightning propagation and action mechanism is searched, the lightning protection technology is researched, the existing lightning protection device is tested, the test data is recorded and perfected, and reliable data and data are provided for researching the lightning disaster and developing the new lightning protection technology.
(6) Research on lightning occurrence and action mechanisms and improvement of lightning protection technical level are one of the goals pursued in the field of lightning testing and research.
Drawings
FIG. 1 is a top view of a dual circuit impulse generator.
Fig. 2 is a front view of a dual circuit impulse generator.
FIG. 3 is a side view of a dual circuit impulse generator.
Fig. 4 is a front view of a measurement control and analysis system.
FIG. 5 is a block diagram of a dual-loop generator.
FIG. 6 is a schematic diagram of a single loop impact test.
FIG. 7 is a schematic diagram of a dual loop test.
FIG. 8 dynamic test lateral impact of the complete machine.
FIG. 9 dynamic test longitudinal impact of the complete machine.
FIG. 10 dynamic test of the complete machine (double loop impact test).
Fig. 11 is a complete machine dynamic test of a long-line transmission device.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and fig. 2, the dual-circuit impulse generator includes a charging device 1, a body energy storage device 2, a trigger system device 3, a dual-circuit discharging ball gap 4, a wave modulation network device 5, a test table 6 and a measurement control analysis system 7; the charging device 1 comprises an insulating cylinder oil-immersed charging transformer, a silicon controlled rectifier high-voltage rectifier silicon stack, a grounding device and a polarity-rotation movable base; the body energy storage device 2 comprises a capacitor and a protection resistor; each capacitor is provided with a protective resistor, the capacitors are low-inductance capacitors and are vertically arranged, the combined arrangement mode adopts fan-shaped arrangement, and the structure is movable; the trigger system device 3 comprises a trigger button, a high-voltage pulse interference resisting trigger device and a synchronous or asynchronous adjusting device; the triggering system device 3 is actuated after the button is actuated, so that the spherical gap is ignited, and the double loops can ignite synchronously or asynchronously; the double-loop discharging ball gap 4 comprises a matched linear motor, a silencing device and two discharging frames; the discharge mode of the double-loop discharge ball gap 4 is synchronous discharge or asynchronous discharge; the motor automatically adjusts a discharge ball gap; the wave regulating network device 5 adopts the non-inductive winding of a nickel-chromium resistance band, and can randomly regulate voltage waves, current waves and complex waves; after triggering discharge, outputting a required arbitrary waveform through a wave modulation network; the test table 6 uses a transformer and a voltage regulator, can be connected to two transmission lines or two SPD test articles at the same time through a decoupling device, and can also select single-path output; an organic glass protective cover is added on the table top of the test table 6, a residual voltage divider is included, and all paths of measured voltage and current are output to the panel through a BNC by adopting a double-core shielding wire; the measurement control analysis system 7 part comprises an automatic control triggering system and a measurement analysis system; the automatic control triggering system comprises a color liquid crystal touch screen, a control button/switch, a PLC, a control device and an execution unit; the measurement and analysis system comprises an industrial personal computer, an oscilloscope, a Pearson coil, a residual voltage divider, a touch screen and a PLC control system.
In a more preferred embodiment, the charging device 1 is a dual-loop output, integral structure; the bridge rectifier is installed inside the insulating cylinder oil-immersed charging transformer, and the two sleeves of the insulating cylinder oil-immersed charging transformer are connected to the capacitor in two paths through 2 protective resistors; the silicon controlled rectifier controls the automatic positive and negative polarity conversion of the high-voltage silicon rectifier stack and the charging protection resistor is arranged in the box body of the insulating cylinder oil-immersed charging transformer and integrally arranged on a movable charging trolley; the series-parallel resistor is installed in a resistor box externally hung on the insulating cylinder oil-immersed charging transformer, 2 cooling fans are additionally installed on the resistor box, and cooling holes are formed in the top of the resistor box.
In a more preferred embodiment, each of said capacitors is assembled on a movable chassis, on the bottom of which 4 steering wheels are mounted; when the energy storage loop is triggered by the trigger system, the energy storage capacitor discharges, and the waveform which is randomly selected according to the standard can be output through the wave modulation unit.
In a more preferred embodiment, the two sets of discharge frames respectively contain discharge balls made of Wu-Cu alloy, and are simultaneously arranged on a movable chassis, and the discharge balls are controlled by adopting three-gap pulses; the ball gap trigger adopts three-gap pulse ignition; the discharge ball gap is adjusted by adopting a linear motor, and the adjustable precision is 0.1 mm; the ball gap is provided with the silencing device.
In a more preferred embodiment, the bottom of the measurement and analysis system is provided with four movable steering wheels, and the outer wheels of the steering wheels do not exceed 20 mm; the measurement signal is connected to the test cabinet by a double shielded coaxial cable.
The logical relationship is as follows: in the test preparation work, the double-circuit discharging ball gap 4 of the double-circuit generator is firstly connected with a DUT (test article to be tested, complete machine to be tested) in parallel, and the test condition is checked to be met. After the test is ready, a test starting button is pressed, the charging device 1 is connected to the body energy storage device 2 in two ways through two sleeves of a transformer and 2 protective resistors to charge a capacitor, and the interval time and the charging voltage of the multi-impact test can be set on a touch screen of the measurement control analysis system 7 in advance. When the charging voltage reaches a set value, the body energy storage device 2 is automatically triggered by the trigger system device 3, the dual-loop can synchronously or asynchronously trigger ignition, after the discharge ball gap is ignited, the energy storage capacitor starts to discharge, the wave modulation network device 5 outputs a waveform which is required to be randomly selected according to the standard through the dual-loop discharge ball gap 4, and measurement and analysis reports of experimental results can be obtained in the measurement and analysis system.
The operation process is as follows:
as shown in fig. 6, single loop impact test: in the whole machine impact test, one end of a high-voltage impact device is a ground, a single-loop 8/20 mu s impact current generator firstly performs a 20kA impact current test on an A-E dipolar and then performs a 20kA impact current test on a B-E dipolar, so that the E pole is only subjected to 20kA impact current test;
as shown in fig. 7, it is extended that: the whole machine test of the double-loop impact equipment: the double-loop 8/20 mu s impulse current generator can simultaneously carry out 20kA impulse current test on A-E and B-E, so that the impulse current check on the E pole at 40kA is closer to real;
the double-loop generator can carry out a lightning impulse test in the normal operation of the whole machine, and the actual equipment is subjected to the lightning impulse and is generated in the normal operation, so that the double-loop whole machine test is closer to the reality.
The present invention has been described in detail with reference to the specific and preferred embodiments, but it should be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and any modifications, equivalents and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (3)
1. A dual circuit impulse generator, characterized by: the device comprises a charging device, a body energy storage device, a triggering system device, a double-loop discharging ball gap, a wave modulation network device, a test article table and a measurement control analysis system;
the charging device comprises an insulating cylinder oil-immersed charging transformer, a silicon controlled rectifier control high-voltage rectifier silicon stack, a grounding device and a polarity rotation and movable base;
the body energy storage device comprises a capacitor and a protection resistor; each capacitor is provided with a protective resistor, the capacitors are low-inductance capacitors and are vertically arranged, the combined arrangement mode adopts fan-shaped arrangement, and the structure is movable;
the trigger system device comprises a trigger button, a high-voltage pulse interference resisting trigger device and a synchronous or asynchronous adjusting device; the triggering system device is actuated after being actuated by the button, so that the spherical gap is ignited, and the double loops can ignite synchronously or asynchronously;
the double-loop discharging ball gap comprises a matched linear motor, a silencing device and two sets of discharging frames; the dual-loop discharge sphere gap discharge mode is synchronous discharge or asynchronous discharge; the motor automatically adjusts a discharge ball gap;
the two sets of discharge frames respectively contain a Wu-Cu alloy discharge ball, and are simultaneously arranged on a movable chassis, and the discharge balls are controlled by adopting three-gap pulses; the ball gap trigger adopts three-gap pulse ignition; the discharge ball gap is adjusted by adopting a linear motor, and the adjustable precision is 0.1 mm; the ball gap is provided with the silencing device;
the wave regulating network device adopts the non-inductive winding of a nickel-chromium resistance band, and can randomly regulate voltage waves, current waves and complex waves; after triggering discharge, outputting a required arbitrary waveform through a wave modulation network;
the test table uses a transformer and a voltage regulator, can be simultaneously connected to two transmission lines or two SPD test articles through a decoupling device, and can also select single-path output; an organic glass protective cover is added on the table top of the test table, a residual voltage divider is included, and all paths of measured voltage and current are output to the panel through a BNC by adopting a double-core shielding wire;
the measurement control analysis system part comprises an automatic control triggering system and a measurement analysis system;
the automatic control triggering system comprises a color liquid crystal touch screen, a control button/switch, a PLC, a control device and an execution unit;
the measurement and analysis system comprises an industrial personal computer, an oscilloscope, a Pearson coil, a residual voltage divider, a touch screen and a PLC control system;
the charging device is a double-loop output and integral structure; the bridge rectifier is installed inside the insulating cylinder oil-immersed charging transformer, and the two sleeves of the insulating cylinder oil-immersed charging transformer are connected to the capacitor in two paths through 2 protective resistors; the silicon controlled rectifier controls the automatic positive and negative polarity conversion of the high-voltage silicon rectifier stack and the charging protection resistor is arranged in the box body of the insulating cylinder oil-immersed charging transformer and integrally arranged on a movable charging trolley; the series-parallel resistor is installed in a resistor box externally hung on the insulating cylinder oil-immersed charging transformer, 2 radiating fans are additionally installed on the resistor box, and radiating holes are formed in the top of the resistor box;
the double-loop impact generator can perform a complete machine static test or a complete machine dynamic test;
the complete machine static test comprises transverse impact and longitudinal impact, and specifically comprises the following steps:
transverse impact: when the A end of the transmission equipment is subjected to high voltage, the B end needs to be grounded; when the end B is subjected to high voltage, the end A is grounded;
longitudinal impact: when the A, B ends of the transmission equipment are short-circuited, the high voltage is applied, and the high voltage is applied to the ground;
the complete machine dynamic test comprises the following steps:
when the lightning protection measures are added at the A, B two ends of the tested equipment, and the equipment is started to work normally, and high-voltage impact is applied to check that the lightning protection effect is closer to real.
2. The dual circuit impulse generator of claim 1, wherein: each capacitor is assembled on a movable chassis, and 4 steering wheels are installed at the bottom of the chassis; when the energy storage loop is triggered by the trigger system, the energy storage capacitor discharges, and the waveform which is randomly selected according to the standard can be output through the wave modulation unit.
3. The dual circuit impulse generator of claim 1, wherein: the bottom of the measurement and analysis system is provided with four movable steering wheels, and the outer wheels of the steering wheels are not more than 20 mm; the measurement signal is connected to the test cabinet by a double shielded coaxial cable.
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| CN105588959A (en) * | 2016-03-04 | 2016-05-18 | 云南电网有限责任公司电力科学研究院 | Mobile impulse current generator and method of use |
| CN107422239A (en) * | 2017-09-27 | 2017-12-01 | 重庆大学 | The more dash current discharge test device and methods of soil |
| CN110045164A (en) * | 2019-05-14 | 2019-07-23 | 云南电网有限责任公司电力科学研究院 | The impulse voltage generator trigger device of more measuring device precise synchronizations |
| CN113589004B (en) * | 2021-08-05 | 2024-02-02 | 淄博信易杰电气有限公司 | High-voltage signal generator |
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