CN212341358U - Multifunctional power frequency synchronous signal generator for partial discharge detection - Google Patents
Multifunctional power frequency synchronous signal generator for partial discharge detection Download PDFInfo
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- CN212341358U CN212341358U CN202020962308.5U CN202020962308U CN212341358U CN 212341358 U CN212341358 U CN 212341358U CN 202020962308 U CN202020962308 U CN 202020962308U CN 212341358 U CN212341358 U CN 212341358U
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Abstract
The application discloses a multi-functional power frequency synchronizing signal generator for partial discharge detection. The multifunctional power frequency synchronous signal generator for partial discharge detection comprises: the power supply module is connected with the power frequency voltage input device; the wired signal transmission device is connected with the power supply module; and the wireless signal transmission device is respectively connected with the power supply module and the wired signal transmission device. The utility model provides a multi-functional power frequency synchronizing signal generator for partial discharge detects can generate wired synchronizing signal or generate wireless synchronizing signal to go to put detecting instrument with corresponding office according to user's needs and be connected, thereby put the detector for office and provide wired synchronizing signal or wireless synchronizing signal.
Description
Technical Field
The application relates to the technical field of partial discharge detection, in particular to a multifunctional power frequency synchronous signal generator for partial discharge detection.
Background
When the partial discharge detector tests partial discharge faults of electrical equipment on site, the collected partial discharge signals need to be compared with zero crossing points of a power grid, so that whether the partial discharge faults occur or not can be judged according to the phase position when the partial discharge occurs, and the type of the partial discharge can be judged.
The device for acquiring the zero crossing point of the power grid in the partial discharge detection instrument is called a multifunctional power frequency synchronous signal generator for partial discharge detection, and in the prior art, the multifunctional power frequency synchronous signal generator for partial discharge detection generally adopts a wired synchronous or wireless synchronous mode. The advantages of wired synchronization are that the delay time is short, the signal is stable and reliable, but a long synchronous signal line is needed between the partial discharge detector and the wired synchronization module, and the wiring is troublesome. The wireless synchronization has the advantages that the wiring is simple and convenient, only the wireless synchronization module needs to be inserted into the power supply wiring board, other wiring is not needed between the partial discharge detector and the wireless synchronization module, and the wiring is simple. However, the wireless synchronization signal is easily affected by the field environment, and the reliability is inferior to that of the wired synchronization method.
The prior art does not have a multi-functional power frequency synchronizing signal generator for partial discharge detection that can be applicable to wired synchronization and wireless synchronization simultaneously.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
It is an object of the present application to provide a multi-functional power frequency synchronization signal generator for partial discharge detection that overcomes or at least alleviates at least one of the above-mentioned deficiencies of the prior art.
In order to achieve the above object, the present application provides a multifunctional power frequency synchronizing signal generator for partial discharge detection, the multifunctional power frequency synchronizing signal generator for partial discharge detection comprising: the power supply module is connected with the power frequency voltage input device; the wired signal transmission device is connected with the power supply module;
the wireless signal transmission device is respectively connected with the power supply module and the wired signal transmission device; wherein the content of the first and second substances,
the power module is configured to power the wired signal transfer device and the wireless signal transfer device and to provide electrical signals to the wired signal transfer device;
the wired signal transfer device is configured to process the obtained power supply signal so as to generate a wired synchronization signal;
the wireless signal transfer device is configured to receive the wired synchronization signal and generate a wireless synchronization signal from the wired synchronization signal.
Optionally, the wired synchronization signal comprises a wired synchronization pulse signal;
the wired signal transmission device comprises a synchronous pulse generation module, the synchronous pulse generation module is connected with the power supply module, and the synchronous pulse generation module is used for processing the obtained power supply signal so as to generate the wired synchronous pulse signal.
Optionally, the wired synchronization signal further comprises an alternating voltage synchronization signal;
the wired signal transmission device further comprises an alternating voltage synchronous generation module, and the alternating voltage synchronous generation module is used for processing the obtained power supply signal so as to generate the alternating voltage synchronous signal.
Optionally, the wireless signal transfer apparatus includes:
the master controller is connected with the synchronous pulse generation module;
the wireless transmitting module is connected with the master controller; wherein the content of the first and second substances,
the master controller is configured to receive the wired synchronization pulse signal, convert the wired synchronization pulse signal into a wireless synchronization signal and transmit the wireless synchronization signal to the wireless transmitting module.
Optionally, the alternating voltage synchronization generating module includes an operational amplifier unit, and the operational amplifier unit is configured to perform operational amplifier processing on the obtained power supply signal to generate the alternating voltage synchronization signal.
Optionally, the ac voltage synchronization generating module further includes an amplitude adjusting unit, the amplitude adjusting unit is connected to the master controller and the operational amplifier unit, and the amplitude adjusting unit is configured to be controlled by the master controller to provide a feedback resistance signal for the operational amplifier unit, so that the operational amplifier unit changes an amplitude of the ac voltage synchronization signal generated by the operational amplifier unit according to the feedback resistance signal.
Optionally, the power module comprises a step-down transformer, and the step-down transformer is respectively connected with the power frequency voltage input device, the synchronous pulse generation module, the alternating voltage synchronous generation module and the wireless signal transmission device, wherein,
the step-down transformer is configured to supply power to the synchronous pulse generation module, the alternating voltage synchronous generation module and the wireless signal transmission device after the voltage provided by the power frequency voltage input device is reduced, and supply power signals to the synchronous pulse generation module and the alternating voltage synchronous generation module.
Optionally, the power module further includes a filtering module, the filtering module is respectively connected to the step-down transformer, the synchronous pulse generation module and the ac voltage synchronous generation module, and the filtering module is configured to filter the power supply signal and then respectively transmit the filtered power supply signal to the synchronous pulse generation module and the ac voltage synchronous generation module.
Optionally, the synchronization pulse generating module includes:
the half-wave shaping module is connected with the filtering module;
the comparator is connected with the half-wave shaping module; wherein the content of the first and second substances,
the half-wave shaping module is used for performing half-wave shaping on the filtered power supply signal and transmitting the filtered power supply signal to the comparator;
and the comparator processes the half-wave shaped power supply signal so as to generate the wired synchronous pulse signal.
The utility model provides a multi-functional power frequency synchronizing signal generator for partial discharge detects can generate wired synchronizing signal or generate wireless synchronizing signal to go to put detecting instrument with corresponding office according to user's needs and be connected, thereby put the detector for office and provide wired synchronizing signal or wireless synchronizing signal.
Drawings
Fig. 1 is a system diagram of a multifunctional power frequency synchronization signal generator for partial discharge detection according to an embodiment of the present application.
Reference numerals
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. 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. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner and are not to be considered limiting of the scope of the present application.
Fig. 1 is a system diagram of a multifunctional power frequency synchronization signal generator for partial discharge detection according to an embodiment of the present application.
The multifunctional power frequency synchronous signal generator for partial discharge detection shown in fig. 1 comprises a power module 1, a wired signal transmission device 3 and a wireless signal transmission device 4, wherein the power module 1 is connected with a power frequency voltage input device 2; the wired signal transmission device 3 is connected with the power module 1; the wireless signal transmission device 4 is respectively connected with the power module 1 and the wired signal transmission device 3; wherein the power module 1 is configured to supply power to the wired signal transfer device, the wireless signal transfer device and provide an electrical signal to the wired signal transfer device; the wired signal transfer device 3 is configured to process the obtained power supply signal so as to generate a wired synchronization signal; the wireless signal transfer apparatus 4 is configured to receive the wired synchronization signal and generate a wireless synchronization signal from the wired synchronization signal.
The utility model provides a multi-functional power frequency synchronizing signal generator for partial discharge detects can generate wired synchronizing signal or generate wireless synchronizing signal to go to put detecting instrument with corresponding office according to user's needs and be connected, thereby put the detector for office and provide wired synchronizing signal or wireless synchronizing signal.
Referring to fig. 1, in the present embodiment, the wired synchronization signal includes a wired synchronization pulse signal;
the wired signal transmission device 3 includes a synchronization pulse generation module 31, the synchronization pulse generation module 31 is connected to the power supply module 1, and the synchronization pulse generation module 31 is configured to process the obtained power supply signal to generate a wired synchronization pulse signal.
In this way, the method can be applied to the partial discharge detector capable of receiving the wired synchronous pulse signal.
Referring to fig. 1, in the present embodiment, the wired synchronization signal further includes an alternating voltage synchronization signal; the wired signal transmission device 3 further includes an alternating voltage synchronization generating module 32, and the alternating voltage synchronization generating module 32 is configured to process the obtained power supply signal to generate an alternating voltage synchronization signal.
In this way, the partial discharge detector can be applied to a partial discharge detector capable of receiving alternating voltage synchronous signals.
Referring to fig. 1, in the present embodiment, the wireless signal transmission apparatus includes a master controller 41 and a wireless transmission module 42, the master controller 41 is connected to the synchronization pulse generation module 31; the wireless transmitting module 42 is connected with the master controller 41; the master controller 41 is configured to receive the wired synchronization pulse signal, convert the wired synchronization pulse signal into a wireless synchronization signal, and transmit the wireless synchronization signal to the wireless transmitting module 42.
In this way, the method can be applied to the partial discharge detector capable of receiving the wireless synchronous signal.
Referring to fig. 1, in the present embodiment, the ac voltage synchronization generating module 32 includes an operational amplifier unit 321, and the operational amplifier unit 321 is configured to perform an operational amplifier process on the obtained power supply signal so as to generate an ac voltage synchronization signal.
Referring to fig. 1, in the present embodiment, the ac voltage synchronization generating module 32 further includes an amplitude adjusting unit 322, the amplitude adjusting unit 322 is respectively connected to the master controller 41 and the operational amplifier unit 321, and the amplitude adjusting unit 322 is configured to be controlled by the master controller 41 to provide a feedback resistance signal for the operational amplifier unit, so that the operational amplifier unit 321 changes an amplitude of the ac voltage synchronization signal generated by the operational amplifier unit according to the feedback resistance signal.
In this way, the amplitude value can be adjusted to be suitable for different partial discharge detection instruments.
Referring to fig. 1, in the present embodiment, the power module includes a step-down transformer 11, and the step-down transformer 11 is respectively connected to the power frequency voltage input device 2, the synchronous pulse generating module 31, the alternating voltage synchronous generating module 32, and the wireless signal transmitting device 4, wherein,
the step-down transformer is configured to step down the voltage provided by the power frequency voltage input device and then supply power to the synchronization pulse generation module, the alternating voltage synchronization generation module and the wireless signal transmission device, and supply power signals to the synchronization pulse generation module and the alternating voltage synchronization generation module.
Referring to fig. 1, in this embodiment, the power module further includes a filtering module 12, the filtering module 12 is respectively connected to the step-down transformer 11, the synchronization pulse generating module 31, and the alternating voltage synchronization generating module 32, and the filtering module 12 is configured to filter the power supply signal and then respectively transmit the filtered power supply signal to the synchronization pulse generating module and the alternating voltage synchronization generating module.
Referring to fig. 1, in the present embodiment, the synchronization pulse generation module includes a half-wave shaping module 311 and a comparator 312, where the half-wave shaping module 311 is connected to the filtering module 12; the comparator 312 is connected to the half-wave shaping module 311; the half-wave shaping module 311 is configured to perform half-wave shaping on the filtered power supply signal and transmit the filtered power supply signal to the comparator; the comparator 312 processes the half-wave shaped power supply signal to generate a wired synchronization pulse signal.
In actual use, on-site partial discharge detection equipment needs to receive power frequency synchronous signals, on-site test conditions are various, a proper synchronous mode is selected according to the distance of a power socket, whether object shielding exists on the site or not, and the multifunctional power frequency synchronous signal generator for partial discharge detection can provide a wired synchronous mode or a wireless synchronous mode for the on-site partial discharge detection equipment according to needs.
To wired synchronization mode, the synchronous signal's that different office put check out test set needs to insert wave form and amplitude requirement diverse, some need insert alternating voltage wave form, some need insert pulse voltage wave form, can selectively provide through this application.
For example, a multifunctional power frequency synchronous signal generator for partial discharge detection is connected with a power frequency voltage signal, the power frequency voltage is converted into an alternating current voltage with a 5V effective value through a step-down transformer on a power module, the 5V voltage is converted into a direct current voltage signal with about 7V through an internal rectifying and filtering circuit, the direct current voltage is converted into a direct current voltage with +3.3V and a direct current voltage with +/-15V through a DC/DC chip, the direct current voltage with +3.3V supplies power for a CPU and other related circuits on the module, and the direct current voltage with +/-15V supplies power for an operational amplifier.
The working principle of the wired synchronous pulse circuit is as follows:
the 5V alternating voltage signal output by the step-down transformer is converted into a positive half-wave signal through a half-wave shaping circuit, the half-wave signal is connected into a comparator (zero-crossing comparator), a square wave signal with the amplitude of 3.3V is output, the rising edge of the square wave signal is the alternating voltage zero-crossing pulse time, and the square wave provides a wired synchronous signal for a partial discharge detector through a multifunctional power frequency synchronous signal generator for partial discharge detection.
The working principle of the alternating-current adjustable synchronous voltage is as follows:
the ac small signal output by the step-down transformer is connected to the input end of the operational amplifier (operational amplifier unit 321), and the master controller controls the feedback resistance of the operational amplifier through the optical coupler, so as to adjust the output multiple of the operational amplifier. The effective values of the output voltage are 1V, 3V, 5V and 10V respectively, and the total number of the gears is 4.
The working principle of the wireless synchronization pulse circuit is as follows:
the master controller detects 3.3V synchronous pulse rising edge arrival time through an IO interruption mode, when the synchronous pulse rising edge arrival time is detected, a synchronous mark is written into the wireless sending module through a serial port, only one character is sent in order to reduce the time interval between the pulse arrival time and the time when a wireless signal is sent, and the character can be set through a dial switch on the master controller.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present application, and are not limited thereto. 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 (9)
1. A multi-functional power frequency synchronizing signal generator for partial discharge detection, characterized in that, a multi-functional power frequency synchronizing signal generator for partial discharge detection includes:
the power supply module (1), the said power supply module (1) is connected with power frequency voltage input device (2);
the wired signal transmission device (3), the wired signal transmission device (3) is connected with the power supply module (1);
the wireless signal transmission device (4), the wireless signal transmission device (4) is respectively connected with the power supply module (1) and the wired signal transmission device (3); wherein the content of the first and second substances,
the power supply module (1) is configured to supply power to the wired signal transfer device and the wireless signal transfer device and to provide an electrical signal to the wired signal transfer device;
the wired signal transfer device (3) is configured to process the obtained power supply signal so as to generate a wired synchronization signal;
the wireless signal transfer device (4) is configured to receive the wired synchronization signal and generate a wireless synchronization signal from the wired synchronization signal.
2. The multi-functional power frequency synchronization signal generator for partial discharge detection of claim 1,
the wired synchronization signal comprises a wired synchronization pulse signal;
the wired signal transmission device (3) comprises a synchronization pulse generation module (31), the synchronization pulse generation module (31) is connected with the power supply module (1), and the synchronization pulse generation module (31) is used for processing the obtained power supply signal so as to generate the wired synchronization pulse signal.
3. The multi-functional power frequency synchronization signal generator for partial discharge detection of claim 2, wherein said wired synchronization signal further comprises an ac voltage synchronization signal;
the wired signal transmission device (3) further comprises an alternating voltage synchronization generation module (32), and the alternating voltage synchronization generation module (32) is used for processing the obtained power supply signal so as to generate the alternating voltage synchronization signal.
4. The multi-functional power frequency synchronization signal generator for partial discharge detection as claimed in claim 3, wherein said wireless signal transmission means comprises:
the master controller (41), the master controller (41) is connected with the synchronous pulse generating module (31);
a wireless transmitting module (42), wherein the wireless transmitting module (42) is connected with the master controller (41); wherein the content of the first and second substances,
the general controller (41) is configured to receive the wired synchronization pulse signal and convert the wired synchronization pulse signal into a wireless synchronization signal to be transmitted to the wireless transmitting module (42).
5. The multifunctional power frequency synchronization signal generator for partial discharge detection as claimed in claim 4, wherein the AC voltage synchronization generation module (32) comprises an operational amplifier unit (321), and the operational amplifier unit (321) is configured to perform an operational amplifier process on the obtained power supply signal to generate the AC voltage synchronization signal.
6. The multifunctional power frequency synchronization signal generator for partial discharge detection as claimed in claim 5, wherein the ac voltage synchronization generation module (32) further comprises an amplitude adjustment unit (322), the amplitude adjustment unit (322) is respectively connected to the master controller (41) and the operational amplifier unit (321), the amplitude adjustment unit (322) is configured to be controlled by the master controller (41) to provide a feedback resistance signal to the operational amplifier unit, so that the operational amplifier unit (321) changes the amplitude of the ac voltage synchronization signal generated by the operational amplifier unit according to the feedback resistance signal.
7. The multi-functional industrial frequency synchronous signal generator for partial discharge detection according to claim 6, wherein the power supply module comprises a step-down transformer (11), the step-down transformer (11) is respectively connected with the industrial frequency voltage input device (2), the synchronous pulse generation module (31), the alternating voltage synchronous generation module (32) and the wireless signal transmission device (4), wherein,
the step-down transformer is configured to step down the voltage provided by the power frequency voltage input device and then supply power to the synchronization pulse generation module, the alternating voltage synchronization generation module and the wireless signal transmission device, and supply power signals to the synchronization pulse generation module and the alternating voltage synchronization generation module.
8. The multifunctional power frequency synchronous signal generator for partial discharge detection as claimed in claim 7, wherein the power supply module further comprises a filtering module (12), the filtering module (12) is respectively connected to the step-down transformer (11), the synchronous pulse generating module (31) and the alternating voltage synchronous generating module (32), and the filtering module (12) is configured to filter the power supply signal and then respectively transmit the filtered power supply signal to the synchronous pulse generating module and the alternating voltage synchronous generating module.
9. The multi-functional power frequency synchronization signal generator for partial discharge detection of claim 8, wherein said synchronization pulse generation module comprises:
a half-wave shaping module (311), the half-wave shaping module (311) being connected with the filtering module (12);
a comparator (312), the comparator (312) being connected to the half-wave shaping module (311); wherein the content of the first and second substances,
the half-wave shaping module (311) is used for performing half-wave shaping on the filtered power supply signal and then transmitting the filtered power supply signal to the comparator;
the comparator (312) processes the half-wave shaped power supply signal to generate the wired synchronization pulse signal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933663A (en) * | 2021-09-28 | 2022-01-14 | 广东电网有限责任公司广州供电局 | Active integrated built-in GIS partial discharge ultrahigh frequency detection device and GIS equipment |
| CN114280429A (en) * | 2021-11-12 | 2022-04-05 | 国网河北能源技术服务有限公司 | GIS partial discharge detection device |
-
2020
- 2020-05-30 CN CN202020962308.5U patent/CN212341358U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933663A (en) * | 2021-09-28 | 2022-01-14 | 广东电网有限责任公司广州供电局 | Active integrated built-in GIS partial discharge ultrahigh frequency detection device and GIS equipment |
| CN114280429A (en) * | 2021-11-12 | 2022-04-05 | 国网河北能源技术服务有限公司 | GIS partial discharge detection device |
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