CN113295976A - Frequency-adjustable monopulse high-voltage signal generating device - Google Patents
Frequency-adjustable monopulse high-voltage signal generating device Download PDFInfo
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- CN113295976A CN113295976A CN202110573440.6A CN202110573440A CN113295976A CN 113295976 A CN113295976 A CN 113295976A CN 202110573440 A CN202110573440 A CN 202110573440A CN 113295976 A CN113295976 A CN 113295976A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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Abstract
The embodiment of the application discloses but frequency modulation monopulse high voltage signal generating device includes: the high-voltage pulse signal generating circuit comprises a shell and a high-voltage pulse signal generating circuit arranged in the shell; the shell is provided with a pulse voltage control button, a pulse generation frequency control button and a pulse signal output port; the pulse voltage control button, the pulse generation frequency control button and the pulse signal output port are electrically connected with the high-voltage pulse signal generation circuit; the high-voltage pulse signal generating circuit comprises a boosting module, a voltage regulating module, an output modulation module, an oscillation control module and an output module; the voltage boosting module is electrically connected with the voltage regulating module; the voltage regulation module is electrically connected with the output modulation module; the output modulation module is respectively and electrically connected with the oscillation control module and the output module. The invention can be convenient for carrying out on-line monitoring and verification on partial discharge on a practical longer cable line and can accurately position the position of a partial discharge source.
Description
Technical Field
The application relates to the technical field of cable line partial discharge on-line monitoring devices, in particular to a frequency-adjustable single-pulse high-voltage signal generating device.
Background
At present, with the improvement of cable manufacturing technology and laying technology, cable lines are laid longer and longer, the number of intermediate joints is correspondingly increased, partial discharge on-line monitoring equipment installed on cable lines with more joints and lengths of thousands of meters or even tens of kilometers needs related personnel to inject signals to positions, close to the equipment, of the joints for verification, so that the workload is very large, manpower and material resources are wasted, and the efficiency is also very low.
In addition, the partial discharge signal generated by the cable needs to be accurately positioned, and corresponding processing measures can be taken after the position of the partial discharge source is determined. At present, the cable partial discharge source is positioned in the whole industry by a waveform time difference method, namely the position of the partial discharge source can be calculated by the partial discharge waveform and reflected waveform time difference or the time difference between two waveform signals, but the partial discharge source positioned on cable lines with the length of more than thousands of meters cannot accurately measure the time difference after the partial discharge signals are propagated and attenuated for a long distance due to small signal values or too long lines, cannot function on a conventional pulse generator, and cannot accurately position the partial discharge source under the condition. Therefore, the invention provides a frequency-adjustable monopulse high-voltage signal generating device.
Disclosure of Invention
The embodiment of the application provides a frequency-adjustable monopulse high-voltage signal generating device, which can be used for conveniently carrying out partial discharge on-line monitoring and verification on actual longer cable lines and accurately positioning the position of a partial discharge source.
In view of the above, the present application provides an adjustable frequency monopulse high voltage signal generating device, comprising: the high-voltage pulse signal generating circuit comprises a shell and a high-voltage pulse signal generating circuit arranged in the shell;
the shell is provided with a pulse voltage control button, a pulse generation frequency control button and a pulse signal output port;
the pulse voltage control button, the pulse generation frequency control button and the pulse signal output port are all electrically connected with the high-voltage pulse signal generation circuit;
the high-voltage pulse signal generating circuit comprises a boosting module, a voltage regulating module, an output modulation module, an oscillation control module and an output module;
the voltage boosting module is electrically connected with the voltage regulating module;
the voltage regulating module is electrically connected with the output modulation module;
the output modulation module is electrically connected with the oscillation control module and the output module respectively.
Optionally, the high-voltage pulse signal generating circuit further comprises a battery module;
the battery module is electrically connected with the boosting module.
Optionally, a rechargeable battery is disposed within the housing;
the rechargeable battery is electrically connected with the battery module.
Optionally, the high-voltage pulse signal generating circuit further includes a charging module;
the charging module is electrically connected with the battery module and the boosting module respectively.
Optionally, a charging port is provided on the housing;
the charging port is electrically connected with the charging module.
Optionally, a main switch is arranged on the housing;
the main switch is electrically connected with the high-voltage pulse signal generating circuit.
Optionally, a pulse generation indicator lamp is arranged on the housing;
the pulse generation indicator lamp is electrically connected with the high-voltage pulse signal generation circuit.
Optionally, the number of the pulse signal output ports is two.
According to the technical scheme, the embodiment of the application has the following advantages: the device is characterized in that after the voltage is boosted to a certain voltage through the boosting module, the boosted voltage is regulated by utilizing the pulse voltage control button to control the voltage regulation module, so that pulse signals with different voltage grades are generated; the voltage regulation module generates a certain grade of voltage pulse signal and then is connected with the output modulation module and the oscillation control module, so that the pulse signal generated by the previous stage is modulated, pulse signals with different frequencies can be generated, and the generation frequency of the pulse signal can be regulated by the pulse generation frequency control button; the device can generate high-voltage pulse signals with different voltages and different generation frequencies by the whole signal control loop, and the signals are output from the pulse signal output port through the output module. The device can adjust the occurrence frequency of pulse signals and generate high-voltage high-energy pulse signals according to the requirements of on-site partial discharge monitoring and verification and partial discharge source positioning, can play a very large role in actual longer cable line partial discharge monitoring application, provides an effective tool for on-site application verification and partial discharge source positioning of equipment, improves the working efficiency, reduces the cost in the application of a state monitoring system, and has good popularization significance.
Drawings
FIG. 1 is a block diagram of a high voltage pulse signal generating circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of an adjustable-frequency monopulse high-voltage signal generating device according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another angle of the tunable single-pulse high-voltage signal generator according to the embodiment of the present application;
FIG. 4 is a schematic circuit diagram of an adjustable frequency monopulse high voltage signal generator according to an embodiment of the present application;
wherein the reference numerals are:
the device comprises a battery module 1, a charging module 2, a boosting module 3, a voltage regulating module 4, an output modulation module 5, an oscillation control module 6, an output module 7, a shell 8, a pulse generation frequency control button 9, a pulse generation indicator lamp 10, a pulse voltage control button 11, a main switch 12, a charging port 13 and a pulse signal output port 14.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The present application provides an embodiment of a frequency-adjustable monopulse high-voltage signal generator, which is specifically shown in fig. 1 to 3.
The frequency-adjustable monopulse high-voltage signal generating device in the embodiment comprises: casing 8 and the high-voltage pulse signal generating circuit who sets up in casing 8 inside, be provided with pulse voltage control button 11 on casing 8, pulse frequency control button 9 and pulse signal output port 14, pulse voltage control button 11, pulse frequency control button 9 and pulse signal output port 14 all are connected with high-voltage pulse signal generating circuit electricity, high-voltage pulse signal generating circuit includes boost module 3, voltage regulation module 4, output modulation module 5, oscillation control module 6 and output module 7, boost module 3 is connected with voltage regulation module 4 electricity, voltage regulation module 4 is connected with output modulation module 5 electricity, output modulation module 5 is connected with oscillation control module 6 and output module 7 electricity respectively. Specifically, the pulse voltage control button 11 is electrically connected with the voltage regulating module 4 and is used for regulating the output voltage value; the pulse generation frequency control button 9 is electrically connected with the oscillation control module 6 and is used for adjusting the generation frequency (period) of a pulse signal, such as the frequency of 50Hz of a power frequency synchronous signal of a running cable; the output module 7 is electrically connected with the pulse signal output port 14 and is used for outputting a pulse signal.
It should be noted that: the device is characterized in that after the voltage is boosted to a certain voltage through the boosting module 3, the boosted voltage is regulated by the voltage regulating module 4 controlled by the pulse voltage control button 11, so that pulse signals with different voltage grades are generated; the voltage regulating module 4 generates a certain grade of voltage pulse signal and then is connected with the output modulating module 5 and the oscillation control module 6, so that the pulse signal generated by the previous stage is modulated to generate pulse signals with different frequencies, and the generation frequency of the pulse signal can be regulated by the pulse generation frequency control button 9; in the whole signal control loop, the device can generate high-voltage pulse signals with different voltages and different generation frequencies, and the signals are output from the pulse signal output port 14 through the output module 7. The device can adjust the occurrence frequency of pulse signals and generate high-voltage high-energy pulse signals according to the requirements of on-site partial discharge monitoring and verification and partial discharge source positioning, can play a very large role in actual longer cable line partial discharge monitoring application, provides an effective tool for on-site application verification and partial discharge source positioning of equipment, improves the working efficiency, reduces the cost in the application of a state monitoring system, and has good popularization significance.
The above is a first embodiment of the frequency-adjustable single-pulse high-voltage signal generating device provided in the present application, and the following is a second embodiment of the frequency-adjustable single-pulse high-voltage signal generating device provided in the present application, specifically referring to fig. 1 to 4.
The frequency-adjustable monopulse high-voltage signal generating device in the embodiment comprises: the device comprises a shell 8 and a high-voltage pulse signal generating circuit arranged in the shell 8, wherein a pulse voltage control button 11, a pulse generation frequency control button 9 and a pulse signal output port 14 are arranged on the shell 8, the pulse voltage control button 11, the pulse generation frequency control button 9 and the pulse signal output port 14 are all electrically connected with the high-voltage pulse signal generating circuit, the high-voltage pulse signal generating circuit comprises a boosting module 3, a voltage regulating module 4, an output modulation module 5, an oscillation control module 6 and an output module 7, the boosting module 3 is electrically connected with the voltage regulating module 4, the voltage regulating module 4 is electrically connected with the output modulation module 5, the output modulation module 5 is respectively electrically connected with the oscillation control module 6 and the output module 7, the voltage regulating module 4 mainly modulates the 50Hz signal and the pulse signals with different frequencies generated by the oscillation control module 6; the oscillation control module 6 generates a low-frequency synchronous trigger signal, the adjusting range is 20-300Hz, the adjustment is carried out according to actual requirements, if 50Hz synchronous trigger is needed, after the adjustment, the oscillation control module 6 can generate a frequency of 50Hz, a peak value of 5V and a duty ratio of 1: 1, thereby generating the required high-voltage pulse signal, and then outputting and applying the signal through an output module 7.
It can be understood that: in the process of monitoring partial discharge of high-voltage and low-voltage cable lines on line, the device can inject any frequency-modulated pulse signal with voltage up to 100V and periodicity into one position, can inject single pulse, and can also adjust the pulse generation frequency (period) at will. The device is characterized in that the pulse voltage amplitude is much larger than that of a conventional generator, the frequency of a single pulse signal wave is very high, the rising edge time of the signal wave can reach 10ns (namely the pulse frequency is as high as 100MHz), the pulse generation frequency is adjustable, and the device can play a great role in checking a long cable line partial discharge online monitoring system and positioning a signal source.
The high-voltage pulse signal generating circuit further comprises a battery module 1, and the battery module 1 is electrically connected with the boosting module 3. Specifically, a rechargeable battery is provided in the case 8, and the rechargeable battery is electrically connected to the battery module 1.
The high-voltage pulse signal generating circuit further comprises a charging module 2, the charging module 2 is electrically connected with the battery module 1 and the boosting module 3 respectively, and not only can the rechargeable battery be charged, but also an external charging power supply can be directly adopted to supply power for the boosting module 3.
As shown in fig. 4, it shows the circuit principle connection mode generated by the pulse of the present device, wherein the input port of the charging module 2 is connected only to the corresponding port of the battery module 1, and it mainly functions to charge the battery module 1, the output port of the boosting module 3 is connected to the voltage regulating module 4 composed of C3 parallel connected with R1-R4, R10, etc., the module is connected to the oscillation control module 6 and the output modulation module 5 composed of the frequency generator, the signal amplifier, the relay, the capacitor, the resistor after being filtered by the partial capacitor resistor, and then the modulated pulse signal is output through the output module 7.
Specifically, as shown in fig. 3, the housing 8 is provided with a charging port 13, and the charging port 13 is electrically connected to the charging module 2.
The shell 8 is provided with a main switch 12, and the main switch 12 is electrically connected with the high-voltage pulse signal generating circuit.
The shell 8 is provided with a pulse generation indicator lamp 10, and the pulse generation indicator lamp 10 is electrically connected with the high-voltage pulse signal generation circuit.
As shown in fig. 2, the number of the pulse signal output ports 14 may be two, and specifically, the strength of the output signal of the port may be adjusted by the pulse voltage control button 11 on the housing 8, and the maximum value of the output voltage may be 100V.
As shown in fig. 2 and 3, in the present embodiment, the pulse signal output port 14 is provided on the front side of the housing 8; the pulse generation indicator lamp 10 and the pulse generation frequency control button 9 are arranged on the top of the shell 8; a main switch 12, a pulse voltage control button 11, and a charging port 13 are provided on the rear side of the housing 8.
During specific implementation, an output signal firstly raises the voltage of the rechargeable battery DC12V to DC100V through the voltage boosting module 3, then a high voltage DC500V is regulated to output voltages required by different gears through the voltage regulating module 4, the oscillation control module 6 generates a low-frequency synchronous trigger signal of 20-300Hz, the output modulation module 5 modulates the high-voltage direct current voltage regulated through the voltage regulating module 4 and the low-frequency synchronous trigger signal generated by the oscillation control module 6 together, and the output module 7 outputs the signal modulated by the output modulation module 5 to the pulse signal output port 14.
The device is mainly used for positioning a field partial discharge source, partial discharge monitoring equipment is used for carrying out partial discharge monitoring at one joint of cable lines, wherein the joint can monitor partial discharge signals, a frequency pulse signal synchronous with a cable operation power frequency signal is injected into the joint by the device, the voltage of the injected pulse signal is based on the pulse signal reflected wave which can be monitored by the monitoring equipment, and the injection voltage of the pulse signal is generally more than 100V for longer cable lines. The monitoring equipment calculates and positions the position of the partial discharge source by monitoring the comparison and analysis of the injected pulse signal and the actually monitored partial discharge signal, such as amplitude change, reflected wave time and the like.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (8)
1. A frequency-adjustable monopulse high-voltage signal generating device is characterized by comprising: the high-voltage pulse signal generating circuit comprises a shell and a high-voltage pulse signal generating circuit arranged in the shell;
the shell is provided with a pulse voltage control button, a pulse generation frequency control button and a pulse signal output port;
the pulse voltage control button, the pulse generation frequency control button and the pulse signal output port are all electrically connected with the high-voltage pulse signal generation circuit;
the high-voltage pulse signal generating circuit comprises a boosting module, a voltage regulating module, an output modulation module, an oscillation control module and an output module;
the voltage boosting module is electrically connected with the voltage regulating module;
the voltage regulating module is electrically connected with the output modulation module;
the output modulation module is electrically connected with the oscillation control module and the output module respectively.
2. The tunable single-pulse high-voltage signal generating device according to claim 1, wherein the high-voltage pulse signal generating circuit further comprises a battery module;
the battery module is electrically connected with the boosting module.
3. The device according to claim 2, wherein a rechargeable battery is disposed in the housing;
the rechargeable battery is electrically connected with the battery module.
4. The tunable single-pulse high-voltage signal generator according to claim 2, wherein the high-voltage pulse signal generator further comprises a charging module;
the charging module is electrically connected with the battery module and the boosting module respectively.
5. The device according to claim 4, wherein the housing is provided with a charging port;
the charging port is electrically connected with the charging module.
6. The device for generating a single pulse high voltage signal with adjustable frequency according to claim 1, wherein a main switch is disposed on the housing;
the main switch is electrically connected with the high-voltage pulse signal generating circuit.
7. The frequency-adjustable monopulse high-voltage signal generating device according to claim 1, wherein a pulse generation indicator lamp is arranged on the housing;
the pulse generation indicator lamp is electrically connected with the high-voltage pulse signal generation circuit.
8. The apparatus according to claim 1, wherein the number of the pulse signal output ports is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110573440.6A CN113295976A (en) | 2021-05-25 | 2021-05-25 | Frequency-adjustable monopulse high-voltage signal generating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110573440.6A CN113295976A (en) | 2021-05-25 | 2021-05-25 | Frequency-adjustable monopulse high-voltage signal generating device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202351374U (en) * | 2011-12-01 | 2012-07-25 | 厦门红相电力设备股份有限公司 | Accurate locating device of local discharge point of power cable |
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method used for checking partial discharge signals of cable |
| CN204065177U (en) * | 2014-04-04 | 2014-12-31 | 广州友智电气技术有限公司 | Analog pulse generating means |
| CN204758743U (en) * | 2015-06-29 | 2015-11-11 | 国家电网公司 | Low tension cable recognition device |
| CN209342896U (en) * | 2018-12-14 | 2019-09-03 | 西安远测电力科技有限公司 | Standard discharge capacity signal generation apparatus for oscillation wave partial discharge test |
-
2021
- 2021-05-25 CN CN202110573440.6A patent/CN113295976A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202351374U (en) * | 2011-12-01 | 2012-07-25 | 厦门红相电力设备股份有限公司 | Accurate locating device of local discharge point of power cable |
| CN204065177U (en) * | 2014-04-04 | 2014-12-31 | 广州友智电气技术有限公司 | Analog pulse generating means |
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method used for checking partial discharge signals of cable |
| CN204758743U (en) * | 2015-06-29 | 2015-11-11 | 国家电网公司 | Low tension cable recognition device |
| CN209342896U (en) * | 2018-12-14 | 2019-09-03 | 西安远测电力科技有限公司 | Standard discharge capacity signal generation apparatus for oscillation wave partial discharge test |
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Application publication date: 20210824 |