CN210626600U - Lightning impulse testing device - Google Patents
Lightning impulse testing device Download PDFInfo
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- CN210626600U CN210626600U CN201921360718.6U CN201921360718U CN210626600U CN 210626600 U CN210626600 U CN 210626600U CN 201921360718 U CN201921360718 U CN 201921360718U CN 210626600 U CN210626600 U CN 210626600U
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Abstract
The utility model relates to an electrical equipment capability test technical field provides a lightning impulse testing arrangement, include: the device comprises a lightning wave generation module, a wave chopper, a voltage divider, a current divider, a power supply module and a measurement and control module; the voltage divider and the wave chopper are respectively connected with the lightning wave generation module, the shunt is connected with the lightning wave generation module through a tested object, and the measurement and control module is connected with the lightning wave generation module; the power supply module is used for supplying power to the measurement and control module, receiving a control instruction sent by the measurement and control module and supplying power to the lightning wave generation module and the wave chopper according to the control instruction; the measurement and control module is used for receiving the voltage signal of the voltage divider and the voltage signal of the shunt, and analyzing and processing the voltage signal of the voltage divider and the voltage signal of the shunt to obtain a lightning impulse test result. The device simple structure, easily operation can realize the automatic measurement to the anti thunderbolt ability of measurand article.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment capability test, especially, relate to a lightning impulse testing arrangement.
Background
Because the power equipment in the power system is mostly arranged outdoors and often suffers from lightning impact, the electrical equipment needs to be subjected to lightning impact test before being put into use so as to determine whether the lightning-resistant capability of the electrical equipment meets the requirement or not, and avoid the problem that how to effectively carry out the lightning impact test on the electrical equipment becomes urgent need in the power industry because the power transmission line fault caused by unqualified lightning-resistant capability of the electrical equipment in the lightning weather is avoided.
The existing lightning impulse testing device is complex in structure and complex in operation.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a lightning impulse testing device is provided to lightning impulse testing device structure is complicated among the solution prior art, complex operation's problem.
The embodiment of the utility model provides a lightning impulse testing arrangement, include: the device comprises a lightning wave generation module, a wave chopper, a voltage divider, a current divider, a power supply module and a measurement and control module;
the voltage divider and the wave chopper are respectively connected with the lightning wave generation module, the shunt is connected with the lightning wave generation module through a tested object, and the measurement and control module is connected with the lightning wave generation module;
the power supply module is used for supplying power to the measurement and control module, receiving a control instruction sent by the measurement and control module and supplying power to the lightning wave generation module and the wave chopper according to the control instruction;
the measurement and control module is used for receiving the voltage signal of the voltage divider and the voltage signal of the shunt, and analyzing and processing the voltage signal of the voltage divider and the voltage signal of the shunt to obtain a lightning impulse test result.
The utility model discloses lightning impulse testing arrangement includes: the lightning wave generator comprises a lightning wave generating module, a chopper, a voltage divider, a current divider, a power supply module and a measurement and control module. The measurement and control module controls the generation of lightning waves by controlling the power supply of the power supply module to the lightning wave generation module, is also connected with the lightning wave generation module to control the grounding of the lightning waves, and can also control the waveform of the lightning waves by controlling the power supply of the power supply module to the wave chopper. The measurement and control module obtains a voltage signal in the lightning wave testing process through the voltage divider and the current divider, and analyzes the voltage signal to obtain a lightning impulse testing result. The testing device is simple in structure and easy to operate, and can automatically measure the lightning stroke resistance of the tested object.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic view of a lightning impulse testing device provided by an embodiment of the present invention;
fig. 2 is a schematic view of another lightning impulse testing device provided by the embodiment of the present invention;
fig. 3 is a schematic view of a lightning wave generation module according to an embodiment of the present invention;
fig. 4 is a schematic view of another lightning impulse testing device provided by the embodiment of the present invention;
fig. 5 is a schematic diagram of a wave modulation module according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another lightning impulse testing device provided by the embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, an embodiment of the present invention provides a lightning impulse testing device, including: the device comprises a lightning wave generation module 11, a chopper 12, a voltage divider 13, a current divider 14, a power supply module 15 and a measurement and control module 16.
The voltage divider 13 and the chopper 12 are respectively connected with the lightning wave generation module 11, the shunt 14 is connected with the lightning wave generation module 11 through a tested object, and the measurement and control module 16 is connected with the lightning wave generation module 11. The power module 15 is configured to supply power to the measurement and control module 16, receive a control instruction sent by the measurement and control module 16, and supply power to the lightning wave generation module 11 and the chopper 12 according to the control instruction. The measurement and control module 16 is configured to receive the voltage signal of the voltage divider 13 and the voltage signal of the shunt 14, and analyze and process the voltage signal of the voltage divider 13 and the voltage signal of the shunt 14 to obtain a lightning impulse test result.
Measurement and control module 16 among the above-mentioned lightning impulse testing arrangement is through the production of control power module 15 to the power supply control lightning wave of lightning wave generation module 11, and measurement and control module 16 still is connected with lightning wave generation module 11, controls the ground connection of lightning wave, thereby measurement and control module 16 can also be through the wave form of control lightning wave of control power module 15 to the power supply of clipper 12 simultaneously, and then can produce multiple lightning impulse wave. The lightning impulse waves act on the tested object, the measurement and control module 16 obtains voltage signals in the lightning impulse wave testing process through the voltage divider 13 and the current divider 14, and analyzes the voltage signals to obtain a lightning impulse testing result. The testing device is simple in structure and easy to operate, and can automatically measure the lightning stroke resistance of the tested object.
In some embodiments, referring to fig. 2, the lightning wave generating module 11 includes: a rectifying unit 111 and a lightning wave generating unit 112 connected in series in multiple stages.
The input end of the rectifying unit 111 is connected with the power module 15, the first stage lightning wave generating unit 112 is connected with the output end of the rectifying unit 111, and the last stage lightning wave generating unit 112 is respectively connected with the tested object, the voltage divider 13 and the wave chopper 12. The rectifying unit 111 rectifies the power supplied from the power module 15 and supplies the rectified power voltage to the multistage series-connected lightning wave generating unit 112. The multiple stages of lightning wave generating units 112 are connected in series so that the voltages of the lightning impulse waves of the respective stages are superposed to obtain the required lightning impulse waves. For example, the voltage of the lightning surge generated by the primary lightning wave generating unit 112 is U0The voltage provided by the lightning wave generating unit 112 with N stages connected in series is NU0。
In some embodiments, referring to fig. 3, the lightning wave generating unit 112 includes: the charging circuit comprises a first charging resistor R1, a second charging resistor R2, a first capacitor C1, a first capacitor C2, a wave head resistor Rf, a wave tail resistor Rt and a first discharging ball gap X1.
A second end of the first charging resistor R1 is connected with a first end of the first capacitor C1, a second end of the first capacitor C1 is connected with a first end of the tail resistor Rt, a second end of the tail resistor Rt is connected with a first end of the first capacitor C2, and a second end of the first capacitor C2 is connected with a first end of the second charging resistor R2; a first end of the first discharge ball gap X1 is connected with a first end of the first capacitor C1, and a second end of the first discharge ball gap X1 is connected with a second end of the first capacitor C2; a first terminal of the ripple head resistor Rf is connected to a second terminal of the first capacitor C1.
When the lightning wave generating unit 112 serves as a first stage, a first end of the first charging resistor R1 is connected to the positive output terminal of the rectifying unit 111; the second end of the wave head resistor Rf is grounded; a second terminal of the second charging resistor R2 is connected to the negative output terminal of the rectifying unit 111.
When the lightning wave generating unit 112 is at the intermediate stage, the first end of the first charging resistor R1 is connected to the second end of the first charging resistor R1 of the lightning wave generating unit 112 at the previous stage; a second end of the wave head resistor Rf is connected to a second end of the wave tail resistor Rt of the previous-stage lightning wave generation unit 112; a second end of the second charging resistor R2 is connected to a first end of the second charging resistor R2 of the previous-stage lightning wave generating unit 112.
When the lightning wave generating unit 112 is the last stage, the first end of the first charging resistor R1 is connected to the second end of the first charging resistor R1 of the lightning wave generating unit 112 of the previous stage; a second end of the wave head resistor Rf is connected to a second end of the wave tail resistor Rt of the previous-stage lightning wave generation unit 112; a second end of the second charging resistor R2 is connected to a first end of the second charging resistor R2 of the previous-stage lightning wave generating unit 112; and the second end of the wave tail resistor Rt is respectively connected with the voltage divider 13, the wave chopper 12 and the tested object.
The case where the lightning wave generating unit 112 is the first stage means the case where the lightning wave generating unit 112 is the first stage lightning wave generating unit (i.e., the first stage lightning wave generating unit in fig. 2) of the above-mentioned multistage series-connected lightning wave generating units; when the lightning wave generating unit 112 is the last stage, it means when the lightning wave generating unit is the last stage lightning wave generating unit (i.e., the last stage lightning wave generating unit in fig. 2) of the above-mentioned multistage series-connected lightning wave generating units; the case where the lightning wave generating unit 112 is an intermediate stage means a case where the lightning wave generating unit is any one stage of the lightning wave generating units other than the first stage and the last stage of the lightning wave generating units among the plurality of stages of the lightning wave generating units connected in series.
The capacitors in the lightning wave generating units 112 of each stage are connected in parallel and charged through the rectifying unit 111, the first discharging spherical gaps X1 are broken down one by one after reaching a certain voltage value, and when all the first discharging spherical gaps X1 are broken down, the first capacitor C1 and the second capacitor C2 are connected in series through the wave head resistors Rf of each stage, so that voltage superposition is realized, and high-voltage lightning shock waves are formed to act on a tested product. The first charging resistor R1 and the second charging resistor R2 function as interstage isolation. The wave head resistor Rf and the wave tail resistor Rt can be used for adjusting the waveform of the lightning shock wave, the wave head resistor Rf determines the time from zero to the wave crest of the lightning shock wave voltage, namely the wave head time Tf, the wave head time Tf can be adjusted by adjusting the resistance value of the wave head resistor Rf, and the national standard Tf is 1.2 muS +/-20%. If the wave head time Tf is larger, the resistance of the wave head resistor Rf is decreased, and vice versa. The wave tail resistance Rt determines the time of the lightning impulse wave voltage from the wave crest to 50% of the peak value, namely the wave tail time Tt, and the wave tail time Tt can be adjusted by adjusting the resistance value of the wave tail resistance Rt, wherein the national standard Tt is 50 muS +/-20%. If the wave tail time Tt is larger, the resistance value of the wave tail resistor Rt is reduced, and vice versa. The voltage of the lightning impulse wave can be adjusted by adjusting the power supply voltage of the lightning wave generation module 11 by the power supply module 15.
It should be noted that, for convenience of description, in fig. 2 and 3, the lightning wave generating units of each stage are denoted by 112, and components having the same function included in the lightning wave generating units of each stage are given the same names and numbers. For example, a resistor having the same function as the first charging resistor R1 of the first-stage lightning-wave generating unit, which is included in the last-stage lightning-wave generating unit, is also named as a first charging resistor R1, and so on.
In some embodiments, referring to fig. 3, the rectifying unit 111 includes: the transformer T, the first unidirectional conducting device D1, the second unidirectional conducting device D2, the first grounding switch K1 and the second grounding switch K2.
The primary side of the transformer T is connected with the power supply module 15; the dotted terminal of the secondary side of the transformer T is connected to the positive terminal of the first unidirectional conducting element D1, the negative terminal of the first unidirectional conducting element D1 is connected to the first terminal of the first grounding switch K1, the second terminal of the first grounding switch K1 is grounded, and the control terminal of the first grounding switch K1 is connected to the measurement and control module 16; the dotted terminal of the secondary side of the transformer T is also connected to the negative terminal of the second unidirectional conducting element D2, the positive terminal of the second unidirectional conducting element D2 is connected to the first terminal of the second grounding switch K2, the second terminal of the second grounding switch K2 is grounded, and the control terminal of the second grounding switch K2 is connected to the measurement and control module 16; the negative electrode of the first one-way conductive element D1 and the positive electrode of the second one-way conductive element D2 are both connected to the first-stage lightning wave generating unit 112. In some embodiments, the first unidirectional conducting element D1 and the second unidirectional conducting element D2 may be diodes.
The power source is an alternating current, and when a positive half-wave of the alternating current is turned on through the first one-way conduction element D1, the rectifying unit 111 outputs a positive pulse direct current to charge a capacitor in the lightning wave generating unit 112 positively, and when a negative half-wave is turned on through the second one-way conduction element D2, the rectifying unit 111 outputs a negative pulse direct current to charge a capacitor in the lightning wave generating unit 112 negatively. The first unidirectional flux element D1 and the second unidirectional flux element D2 are exchanged to meet the requirement of polarity. The output voltage of the rectifying unit 111 should match the capacitance in the lightning wave generating unit 112.
In some embodiments, referring to fig. 4, the lightning impulse testing apparatus may further include: and a wave modulation module 17.
The lightning wave generating module 11 is connected with the tested object through the wave modulating module 17. The wave modulation module 17 is used for reducing loop inductance, reducing wave head time T and suppressing high-frequency oscillation.
In some embodiments, referring to fig. 5, the wave modulation module 17 includes: a third capacitor C3, a third resistor R3, a fourth capacitor C4 and a second discharge ball gap X2.
The fourth capacitor C4 is connected in parallel with the lightning wave generation module 11, the fourth capacitor C4, the third resistor R3, the second discharge ball gap X2 and the object to be measured are connected in series, and the third capacitor C3 is connected in parallel with the third resistor R3.
The lightning impulse wave generated by the lightning wave generating module 11 firstly acts on the wave modulating module 17 to charge the fourth capacitor C4, and the second discharging sphere gap X2 is broken down after the C4 is saturated, so that the adjusted lightning impulse wave acts on the tested object. The wave front time of the adjusted lightning impulse wave is determined by the wave modulating module 17 instead of the lightning wave generating module 11, and the wave front time Tf can be adjusted by adjusting the third resistor R3. Meanwhile, the lead inductance of the wave modulation module 17 is small, so that the oscillation or overshoot of the loop is effectively reduced.
In some embodiments, chopper 12 may be a multi-stage chopper.
In some embodiments, referring to fig. 6, the lightning impulse testing apparatus may further include: a delay module 18. The chopper 12 is connected to the lightning wave generation module 11 through the delay module 18. The truncation time may be adjusted by adjusting delay module 18. In some embodiments, delay module 18 may include: an electronic delay unit or a delay cable.
In some embodiments, the power module 15 may include: a mains Supply unit 151 and a UPS (Uninterruptible Power Supply) Supply unit 152.
The utility power supply unit 151 is configured to supply power to the measurement and control module 16, the lightning wave generation module 11, and the chopper 12, and charge the UPS power supply unit 152. The UPS power supply unit 152 is configured to supply power to the measurement and control module 16 when the utility power supply unit 151 fails.
When the commercial power supply unit 151 works normally, the commercial power supply unit 151 supplies power to the measurement and control module 16, the lightning wave generation module 11 and the chopper 12. When the utility power supply unit 151 fails or the utility power is cut off, the UPS power supply unit 152 is started, and the UPS power supply unit 152 is used for supplying power to the measurement and control module 16, so as to prevent loss of test data and results caused by sudden power failure.
In some embodiments, the power supply module 15 supplies 380V ac power to the lightning wave generation module 11 and the chopper, and the power supply supplies 220V ac power to the measurement and control module 16.
In some embodiments, the voltage divider 13 is a capacitive voltage divider. The capacitive voltage divider is resistant to voltage and not easy to break down, and is suitable for measuring alternating-current impact voltage.
In some embodiments, attenuators are respectively disposed between the voltage divider 13 and the measurement and control module 16 and between the shunt 14 and the measurement and control module 16, and are used to adjust the signal magnitude and match the impedance.
In some embodiments, instrumentation module 16 may include: a PLC (Programmable Logic Controller) control unit 161, a measurement and control terminal 162, and an oscilloscope 163.
The PLC control unit 161 is connected to the power module 15 and the lightning wave generation module 11, the oscilloscope 163 has two channels, which are connected to the voltage divider 13 and the shunt 14, respectively, and the measurement and control terminal 162 is connected to the PLC control unit 161 and the oscilloscope 163, respectively; the measurement and control terminal 162 is used for controlling the PLC control unit 161, and analyzing and processing the voltage signal of the voltage divider 13 and the voltage signal of the shunt 14 acquired by the oscilloscope 163 to obtain a lightning impulse test result. In this embodiment, the measurement and control terminal 162 is embedded with a computer program for controlling the testing device, expanding the system function, storing data, analyzing and processing data.
The measurement and control terminal 162 sends a control instruction to the PLC control unit 161, and the PLC control unit 161 controls the power supply of the power module 15 according to the control instruction. For example, when a full-wave test is performed on the object to be tested, the power supply module 15 supplies power to the lightning wave generation module 11 and the measurement and control terminal 162, and cuts off the power supply to the chopper 12, so that the lightning wave generation module 11 generates a full-wave to test the object to be tested. The measurement and control module 16 obtains voltage signals of the voltage divider 13 and the shunt 14, and analyzes the signals to obtain a test result. When the wave chopping test is performed on the tested object, the measurement and control terminal 162 sends a control instruction to the PLC control unit 161, and the PLC control unit 161 controls the power supply module 15 to simultaneously supply power to the measurement and control module 16, the lightning wave generation module 11, and the wave chopper 12 according to the control instruction, so as to generate a wave chopping impact voltage. The measurement and control module 16 can also send a control command to the PLC control unit 161 to control the lightning wave generating module 11 to be grounded. For example, referring to fig. 3, the lightning wave generating module 11 includes a first grounding switch K1 and a second grounding switch K2, control ends of the two grounding switches are respectively connected to the PLC control unit 161, and the measurement and control module 16 controls the first grounding switch K1 and the second grounding switch K2 to be turned on and off through the PLC control unit 161, so as to control the grounding of the lightning wave generating module 11. The oscilloscope 163 acquires the voltage signal of the voltage divider 13 and the voltage signal of the shunt 14 and sends the voltage signals to the measurement and control terminal 162, and the measurement and control terminal 162 stores, analyzes, calculates and displays the data of the voltage signal of the voltage divider 13 and the voltage signal of the shunt 14.
In some embodiments, the PLC control unit 161 may further include: and a manual control subunit. When the control of the measurement and control terminal 162 to the PLC control unit 161 fails, the PLC control unit 161 can be manually operated and controlled through the manual control subunit.
In some embodiments, the test control terminal 162 may include a touch screen. The touch screen is used for displaying waveforms and analysis results, can realize man-machine interaction, and is convenient to operate and not easy to make mistakes.
In some embodiments, the measurement and control module 16 may further include a console, and the PLC control unit 161, the measurement and control terminal 162, and the oscilloscope 163 may be disposed on the console, so as to facilitate operation and unified control.
In some embodiments, the lightning impulse testing device is grounded by using a copper sheet, so as to reduce the grounding inductance.
In some embodiments, the embodiment of the utility model provides a measurement and control terminal 162 of lightning impulse testing device is embedded to have the ATS software, and concrete operating procedure is as follows:
(1) the software interface is opened, the experimental setting is selected, CH1 (full wave or chopped wave) and CH2 (other current waveforms) are selected from the waveforms, the polarities are all selected from "-" (or +), and the horizontal axis position, the vertical scale and the bandwidth limitation are not set.
(2) The time base is set to be 20 mu S/div (2 mu S/div is selected when the wave is intercepted), attention is paid to that the synthesis experiment does not need to be selected, and the filter is automatically set to be hooked after the synthesis experiment is selected.
(3) STEP2 triggers selection of either CH1 or CH 2. Note that: and clicking a setting key after all the settings are finished. And checking whether the 'yellow' at the lower right corner of the computer screen displays the IP address or not, and otherwise, clicking a 'setting' key to report an error by the system.
(4) And setting click parameters. The parameters for CH1 were taken from the nameplate identification of the voltage divider and CH2 were taken from the nameplate identification of the diverter in the scale factor setting, where the channel unit of CH2 is in ohms.
(5) Click on other parameter settings. The positions of the horizontal axes of the waveforms of CH1 and CH2 are mainly set, the middle is 0, the upper is 1, the lower is 2, the lower is-1, -2, -3, the saving path and the color of the printed picture are set.
(6) And (4) lightning impulse operation. The ball distance of the discharge ball gap is pulled to be minimum, and the discharge ball gap can be at the lower limit or near the lower limit, wherein the discharge ball gap is optimally adjusted near the lower limit. The impulse voltage grade is selected to be 1 grade, the impulse voltage is twice of the ball distance of the discharging ball gap, the closing button is clicked, whether the grounding switch is opened or not is observed, and then the starting button is clicked to start charging.
(7) All charges are discharged through the ground circuit in the charging process. The fault status bar turns yellow and can be reset by clicking a reset button. If the voltage returns to zero, the state is safe.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A lightning impulse testing device, comprising: the device comprises a lightning wave generation module, a wave chopper, a voltage divider, a current divider, a power supply module and a measurement and control module;
the voltage divider and the wave chopper are respectively connected with the lightning wave generation module, the current divider is connected with the lightning wave generation module through a tested object, and the measurement and control module is connected with the lightning wave generation module;
the power supply module is used for supplying power to the measurement and control module, receiving a control instruction sent by the measurement and control module and supplying power to the lightning wave generation module and the wave chopper according to the control instruction;
the measurement and control module is used for receiving the voltage signal of the voltage divider and the voltage signal of the shunt, and analyzing and processing the voltage signal of the voltage divider and the voltage signal of the shunt to obtain a lightning impulse test result.
2. The lightning impulse testing device of claim 1, wherein said lightning wave generating module comprises: a rectifying unit and a lightning wave generating unit connected in series in multiple stages;
the input end of the rectifying unit is connected with the power supply module, the first stage lightning wave generating unit is connected with the output end of the rectifying unit, and the last stage lightning wave generating unit is respectively connected with the tested object, the voltage divider and the wave chopper.
3. The lightning impulse test device of claim 2, wherein said lightning wave generating unit includes: the first charging resistor, the second charging resistor, the first capacitor, the second capacitor, the wave head resistor, the wave tail resistor and the first discharging ball gap;
the second end of the first charging resistor is connected with the first end of the first capacitor, the second end of the first capacitor is connected with the first end of the wave tail resistor, the second end of the wave tail resistor is connected with the first end of the second capacitor, and the second end of the second capacitor is connected with the first end of the second charging resistor; the first end of the first discharging spherical gap is connected with the first end of the first capacitor, and the second end of the first discharging spherical gap is connected with the second end of the second capacitor; the first end of the wave head resistor is connected with the second end of the first capacitor;
when the lightning wave generation unit is used as a first stage, a first end of the first charging resistor is connected with a positive output end of the rectification unit; the second end of the wave head resistor is grounded; the second end of the second charging resistor is connected with the negative output end of the rectifying unit;
when the lightning wave generation unit is used as an intermediate stage, the first end of the first charging resistor is connected with the second end of the first charging resistor of the lightning wave generation unit of the previous stage; the second end of the wave head resistor is connected with the second end of the wave tail resistor of the upper-stage lightning wave generation unit; a second end of the second charging resistor is connected with a first end of a second charging resistor of the upper stage lightning wave generation unit;
when the lightning wave generation unit is used as the last stage, the first end of the first charging resistor is connected with the second end of the first charging resistor of the lightning wave generation unit of the previous stage; the second end of the wave head resistor is connected with the second end of the wave tail resistor of the upper-stage lightning wave generation unit; a second end of the second charging resistor is connected with a first end of a second charging resistor of the upper stage lightning wave generation unit; and the second end of the wave tail resistor is respectively connected with the voltage divider, the wave chopper and the tested object.
4. The lightning impulse testing device of claim 2, wherein said rectifying unit comprises: the transformer, the first unidirectional conducting element, the second unidirectional conducting element, the first grounding switch and the second grounding switch;
the primary side of the transformer is connected with the power supply module;
the dotted terminal of the secondary side of the transformer is connected with the anode of the first unidirectional conduction element, the cathode of the first unidirectional conduction element is connected with the first terminal of the first grounding switch, the second terminal of the first grounding switch is grounded, and the control terminal of the first grounding switch is connected with the measurement and control module;
the dotted terminal of the secondary side of the transformer is also connected with the negative electrode of the second unidirectional conduction element, the positive electrode of the second unidirectional conduction element is connected with the first end of the second grounding switch, the second end of the second grounding switch is grounded, and the control end of the second grounding switch is connected with the measurement and control module;
and the cathode of the first unidirectional conduction element and the anode of the second unidirectional conduction element are both connected with the first-stage lightning wave generation unit.
5. The lightning strike testing device of claim 1, further comprising: a wave modulation module;
the lightning wave generation module is connected with the tested object through the wave modulation module.
6. The lightning impulse testing device of claim 5, wherein said wave modulating module comprises: a third capacitor, a third resistor, a fourth capacitor and a second discharge ball gap;
the fourth capacitor is connected in parallel with the lightning wave generation module, the fourth capacitor, the third resistor, the second discharge ball gap and the tested object are connected in series, and the third capacitor is connected in parallel with the third resistor.
7. The lightning strike testing device of claim 1, further comprising: a delay module;
the wave chopper is connected with the lightning wave generation module through the time delay module.
8. The lightning impulse testing device of claim 1, characterized in that said instrumentation module comprises: the PLC control unit, the measurement and control terminal and the oscilloscope are connected;
the PLC control unit is respectively connected with the power supply module and the lightning wave generation module, the oscilloscope is respectively connected with the voltage divider and the current divider, and the measurement and control terminal is respectively connected with the PLC control unit and the oscilloscope;
and the measurement and control terminal is used for controlling the PLC control unit and analyzing and processing the voltage signal of the voltage divider and the voltage signal of the current divider acquired by the oscilloscope to obtain a lightning impulse test result.
9. The lightning strike testing device of claim 8, wherein the power module comprises: the system comprises a commercial power supply unit and a UPS power supply unit;
the commercial power supply unit is used for supplying power to the measurement and control module, the lightning wave generation module and the wave chopper and charging the UPS power supply unit;
the UPS power supply unit is used for supplying power for the measurement and control module when the commercial power supply unit fails.
10. The lightning impulse testing device of any one of claims 1 to 9, characterized in that said chopper is a multistage chopper.
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| CN201921360718.6U CN210626600U (en) | 2019-08-20 | 2019-08-20 | Lightning impulse testing device |
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| CN201921360718.6U CN210626600U (en) | 2019-08-20 | 2019-08-20 | Lightning impulse testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320456A (en) * | 2019-08-20 | 2019-10-11 | 安徽南瑞继远电网技术有限公司 | Lightning impulse test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320456A (en) * | 2019-08-20 | 2019-10-11 | 安徽南瑞继远电网技术有限公司 | Lightning impulse test device |
| CN110320456B (en) * | 2019-08-20 | 2024-08-27 | 安徽南瑞继远电网技术有限公司 | Lightning impulse testing device |
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