CN210923870U - Detection system for equipment fault discharge on distribution network column - Google Patents
Detection system for equipment fault discharge on distribution network column Download PDFInfo
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- CN210923870U CN210923870U CN201921299482.XU CN201921299482U CN210923870U CN 210923870 U CN210923870 U CN 210923870U CN 201921299482 U CN201921299482 U CN 201921299482U CN 210923870 U CN210923870 U CN 210923870U
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Abstract
The utility model belongs to the technical field of power system equipment state detection, in particular to a detection system for equipment fault discharge on a distribution network column, which comprises an acquisition module, a detection module and a control module, wherein the acquisition module is used for acquiring power frequency periodic signals, ultrahigh frequency signals and ultraviolet photon signals of equipment on the distribution network column; the multi-channel AD continuous conversion module is used for converting the analog signals output by the acquisition module into digital signals; the MCU module is used for acquiring the digital signals output by the multi-path AD continuous conversion module and extracting the amplitude and the time of the ultrahigh frequency signals, the phase relation between the ultrahigh frequency signals and the power frequency period and the number of ultraviolet photons; and the control terminal is connected with the MCU module through the communication module, and is used for drawing a PRPD map, displaying the number of ultraviolet photons, identifying the fault discharge type and displaying the result. The utility model discloses use superfrequency method and ultraviolet detection method to realize the non-contact detection of joining in marriage equipment on the net post.
Description
Technical Field
The utility model belongs to the technical field of power system equipment state detects, especially relate to a join in marriage discharged detecting system of equipment trouble on net post.
Background
The power network mainly comprises a main network and a distribution network, and compared with the main network, the distribution network is more complex in structure and larger in equipment quantity. At present, various fault discharge detection methods for main network equipment are available, and mainly include a high-frequency pulse current method, an ultrasonic wave method, an ultrahigh frequency method, an ultraviolet detection method and a chemical analysis method. Each method has its own advantages and corresponding application scenarios, and relevant detection guidelines or criteria have been developed in the detection of a faulty discharge of a primary network device. For the fault discharge detection of the power distribution network equipment, a corresponding method is lacked, and currently, in practical application, the method and the equipment for detecting the fault discharge of the main network equipment are often directly used for the fault discharge detection of the distribution network equipment. The main network equipment is mostly concentrated in the substation, and the distribution network equipment is distributed quite dispersedly according to the load distribution characteristics. Taking the device on the distribution net post as an example, the main devices are as follows: the device comprises a transformer, a circuit breaker, a voltage transformer, a current transformer, a lightning arrester, an insulator and the like, wherein the devices are placed in an open mode, and various types of fault discharge can be inevitably generated after the devices are operated for a long time. The types of the fault discharge may be classified into an internal discharge and an external discharge according to a position where the discharge occurs. The internal discharge is mostly insulation fault discharge, and the external discharge is mainly of corona discharge, creeping discharge and the like. The current method is used for detecting the fault discharge of equipment on a distribution network column by using live detection equipment in a main network transformer substation, and has the problems of huge workload, low detection efficiency, complex data fusion process of various detection methods, difficult discharge type identification and the like. Therefore, although the live detection work of the distribution network equipment is carried out at present, due to the problems, the efficiency of equipment state detection on the distribution network column and the accuracy of fault identification are severely limited.
Disclosure of Invention
In order to overcome the defect that exists among the prior art, the utility model aims at providing a join in marriage detection system that equipment trouble discharged on net post uses superfrequency method and ultraviolet detection method realization to join in marriage the non-contact detection of net post equipment.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a join in marriage detection system that net post upper apparatus fault discharged contains:
the acquisition module is used for acquiring a power frequency periodic signal, an ultrahigh frequency signal and an ultraviolet photon signal of equipment on the distribution network column;
the multi-channel AD continuous conversion module is used for converting the analog signals output by the acquisition module into digital signals;
the MCU module is used for acquiring the digital signals output by the multi-path AD continuous conversion module and extracting the amplitude and the time of the ultrahigh frequency signals, the phase relation between the ultrahigh frequency signals and the power frequency period and the number of ultraviolet photons; and
and the control terminal is connected with the MCU module through the communication module, and is used for drawing a PRPD map, displaying the number of ultraviolet photons, identifying the fault discharge type and displaying the result.
Furthermore, the acquisition module comprises a power frequency electric field sensor module, a directional ultrahigh frequency sensor module and an ultraviolet sensor module;
the power frequency electric field sensor module is used for acquiring a power frequency periodic signal;
the directional ultrahigh frequency sensor module is used for detecting ultrahigh frequency signals generated by discharge;
the ultraviolet sensor module is used for detecting the number of photons generated by external discharge.
Further, the power frequency electric field sensor module comprises a power frequency electric field sensor, a low-pass filter, a DC blocking device and an amplifier, wherein the power frequency electric field sensor is sequentially connected with the low-pass filter, the DC blocking device and the amplifier.
Furthermore, the directional ultrahigh frequency sensor module comprises a directional ultrahigh frequency sensor, a radio frequency amplifier, a band elimination filter and an envelope detector, wherein the directional ultrahigh frequency sensor is sequentially connected with the radio frequency amplifier, the band elimination filter and the envelope detector.
Further, the ultraviolet sensor module comprises an ultraviolet sensor, a photoelectric converter and a voltage follower, and the ultraviolet sensor is sequentially connected with the photoelectric converter and the voltage follower.
Furthermore, the system also comprises a video acquisition module which comprises a camera and is used for aiming the detection target of the detection personnel on the ground.
Further, still include programme-controlled cloud platform, be connected with the MCU module, directional superfrequency sensor module, ultraviolet sensor module and video acquisition module are all installed on programme-controlled cloud platform, video acquisition module's camera lens direction, directional superfrequency sensor module dominant direction and ultraviolet sensor module's detection direction are unanimous.
Furthermore, the device also comprises a mobile inspection device, wherein the power frequency electric field sensor module, the directional ultrahigh frequency sensor module, the ultraviolet sensor module, the video acquisition module, the program control holder, the multi-path AD continuous conversion module, the MCU module and the communication module are all arranged above the mobile inspection device.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses an adopt the superfrequency method to combine ultraviolet detection method to discharge to joining in marriage equipment trouble on the net post and detect, promoted the accuracy that the trouble discharged and detected to can realize the discernment of the type of discharging effectively. The utility model discloses a remove the detection that inspection device joined in marriage net post and go up equipment, overcome and joined in marriage net post and gone up the equipment distribution and extensively bring the difficulty for traditional detection method, promote the efficiency of joining in marriage net equipment trouble discharge detection by a wide margin. The utility model discloses expand the field of joining in marriage net equipment state parameter intelligence perception, guaranteed to join in marriage net safety and stability operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are 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 creative efforts.
Fig. 1 is a schematic block diagram of a system for detecting a device fault discharge on a distribution network column according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a system for detecting a fault discharge of a device on a distribution network column;
FIG. 3 is a discriminant graph showing that the discharge pulse phase in the PRPD map of the mobile phone signal is irrelevant to the power frequency period;
FIG. 4 is a discriminant graph of the radar signal in which the phase of the discharge pulse is irrelevant to the power frequency cycle in the PRPD map;
FIG. 5 is a distinguishing diagram of the correlation between the phase of the discharge pulse and the power frequency cycle in the PRPD map of the discharge of the floating potential body;
FIG. 6 is a discriminant graph of correlation between discharge pulse phase and power frequency cycle in PRPD map of creeping discharge;
FIG. 7 is a circuit diagram of a low pass filter;
FIG. 8 is a circuit diagram of an amplifier;
FIG. 9 is a circuit diagram of a radio frequency amplifier;
FIG. 10 is a circuit diagram of an envelope detector;
FIG. 11 is a circuit diagram of a voltage follower;
fig. 12 is a circuit diagram of a multi-channel AD continuous conversion module.
The reference numbers in the figures denote: 1. the system comprises a power frequency electric field sensor module, a directional ultrahigh frequency sensor module, an ultraviolet sensor module, a program-controlled holder, a multi-path AD continuous conversion module, a MCU module, a communication module, a video acquisition module, a control terminal and a mobile inspection device, wherein the directional ultrahigh frequency sensor module is 2, the ultraviolet sensor module is 3, the program-controlled holder is 4, the multi-path AD continuous conversion module is 5, the MCU module is 6, the communication module is 7, the video.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the system for detecting device fault discharge on a distribution network column of the present embodiment includes a power frequency electric field sensor module 1, a directional ultrahigh frequency sensor module 2, an ultraviolet sensor module 3, a video acquisition module 8, a program control cradle head 4, a multi-channel AD continuous conversion module 5, an MCU module 6, a communication module 7, a control terminal 9, and a mobile inspection device 10.
The power frequency electric field sensor module 1 is used for obtaining a power frequency periodic signal and comprises a power frequency electric field sensor, a low-pass filter, a DC blocking device and an amplifier. As shown in FIG. 7, the cut-off frequency of the low-pass filter is < 130 Hz. The power frequency electric field sensor is connected with the low-pass filter, the DC blocking device and the amplifier in sequence, as shown in FIG. 8, the output of the amplifier is connected to the input end of the multi-channel AD continuous conversion module 5.
The directional ultrahigh frequency sensor module 2 is used for detecting an ultrahigh frequency signal generated by discharge and comprises a directional ultrahigh frequency sensor, a radio frequency amplifier, a band elimination filter and an envelope detector. The frequency band range of the directional ultrahigh frequency sensor is 300 MHz-3 GHz or a certain sub-frequency band thereof. The azimuth angle of the directional uhf sensor should be less than 120 degrees. As shown in fig. 9, the bandwidth of the rf amplifier is consistent with the frequency band of the directional uhf sensor. The band of the band elimination filter is 800 MHz-1 GHz and 1.8 GHz-2 GHz. The bandwidth of the envelope detector coincides with the frequency band of the directional uhf sensor. The directional ultrahigh frequency sensor is connected with the radio frequency amplifier, the band elimination filter and the envelope detector in sequence, as shown in fig. 10, the output of the envelope detector is connected to the input end of the multi-channel AD continuous conversion module 5.
The ultraviolet sensor module 3 is configured to detect a photon number generated by external discharge, and includes an ultraviolet sensor, a photoelectric converter, and a voltage follower, as shown in fig. 11, where an output of the voltage follower is connected to an input end of the multiple AD continuous conversion module 5.
And the video acquisition module 8 is used for aiming detection of the on-column equipment on the ground by an operator in the detection process and comprises a camera, a video acquisition card and a related communication interface.
The program control holder 4 is connected with the MCU module 6 through interfaces such as USB, serial port, Bluetooth and network, receives instructions such as rotation and stop of the MCU module 6, and performs corresponding actions according to the instructions. The directional ultrahigh frequency sensor module 2, the ultraviolet sensor module 3 and the video acquisition module 8 are all installed on the program control holder 4, wherein the lens direction of the video acquisition module 8, the main direction of the directional ultrahigh frequency sensor module 2 and the detection direction of the ultraviolet sensor module 3 are consistent.
As shown in fig. 12, the multi-channel AD continuous conversion module 5 includes a multi-channel AD conversion chip, a single chip, and a memory. The multi-channel AD conversion chip at least has three independent synchronous adopted channels, and converts analog signals output by the power frequency electric field sensor module 1, the directional ultrahigh frequency sensor module 2 and the ultraviolet sensor module 3 into digital signals. The sampling rate of each sampling channel of the multi-channel AD conversion chip is 5MS/s or more, the sampling bit number is 8bit or more, and the model of the multi-channel AD conversion chip in the embodiment is LTC 2325. The single chip microcomputer controls the acquisition time sequence of the multi-path AD conversion chip and temporarily stores the conversion result in the memory, the memory is provided with two paths of reading and writing channels, one path of the channel is used for data writing, the other path of the channel is used for data reading, and the data reading interface is connected with the data reading and writing interface of the MCU module 6.
The MCU module 6 is used for acquiring three types of signals output by the multi-path AD continuous conversion module 5, extracting the amplitude and the time of the ultrahigh frequency signal and the phase relation between the ultrahigh frequency signal and the power frequency period, and processing the data converted by the ultraviolet sensor module 3 to acquire the number of ultraviolet photons; and the control terminal 9 can also monitor the instruction analysis and program control of the cradle head 4.
The communication module 7, including but not limited to a USB, a serial port, a bluetooth, a WiFI, and other wired or wireless communication interfaces, realizes communication between the MCU module 6 and the control terminal 9 and communication between the video capture module 8 and the control terminal 9, and realizes transmission of a detection result, a pan/tilt control command, a video signal, and the like.
The control terminal 9 can be a mobile phone, a tablet personal computer, a notebook computer and the like, the control terminal 9 is operated by a detection person, and has the functions of real-time display output by the video acquisition module 8, control instruction issuing of the program control holder 4, drawing of a PRPD map, display of ultraviolet photon number, identification and result display of fault discharge types, control of the mobile inspection device 10 and the like.
Remove inspection device 10, can be for patrolling and examining vehicle, unmanned aerial vehicle etc.. As shown in fig. 2, a power frequency electric field sensor module 1, a directional ultrahigh frequency sensor module 2, an ultraviolet sensor module 3, a video acquisition module 8, a program control cradle head 4, a multi-channel AD continuous conversion module 5, an MCU module 6 and a communication module 7 are all arranged above the mobile inspection device 10. If the mobile inspection device 10 is an inspection vehicle, the control terminal 9 and the mobile inspection device 10 are not directly controlled any more, the inspection vehicle is driven by a full-time driver, and a detector detects the fault discharge of equipment on the distribution network column through the control terminal 9. If remove inspection device 10 and be unmanned aerial vehicle, control terminal 9 can control unmanned aerial vehicle.
The detection method of the detection system for the fault discharge of the equipment on the distribution network column comprises the following steps:
And 3, starting the control terminal 9 to judge the discharge type in real time and storing the detection result.
And 4, driving the mobile inspection device 10 to the next detection position.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a join in marriage detection system that net post went up equipment trouble and discharged which characterized in that contains:
the acquisition module is used for acquiring a power frequency periodic signal, an ultrahigh frequency signal and an ultraviolet photon signal of equipment on the distribution network column;
the multi-channel AD continuous conversion module is used for converting the analog signals output by the acquisition module into digital signals;
the MCU module is used for acquiring the digital signals output by the multi-path AD continuous conversion module and extracting the amplitude and the time of the ultrahigh frequency signals, the phase relation between the ultrahigh frequency signals and the power frequency period and the number of ultraviolet photons; and
and the control terminal is connected with the MCU module through the communication module and is used for drawing a PRPD map, displaying the number of ultraviolet photons, identifying the fault discharge type and displaying the identification result.
2. The system for detecting the fault discharge of the equipment on the distribution network column according to claim 1, wherein the acquisition module comprises a power frequency electric field sensor module, a directional ultrahigh frequency sensor module and an ultraviolet sensor module;
the power frequency electric field sensor module is used for acquiring a power frequency periodic signal;
the directional ultrahigh frequency sensor module is used for detecting ultrahigh frequency signals generated by discharge;
the ultraviolet sensor module is used for detecting the number of photons generated by external discharge.
3. The system for detecting the fault discharge of the equipment on the distribution network column as recited in claim 2, wherein the power frequency electric field sensor module comprises a power frequency electric field sensor, a low pass filter, a dc blocking device and an amplifier, and the power frequency electric field sensor is sequentially connected with the low pass filter, the dc blocking device and the amplifier.
4. The system for detecting the device fault discharge on the distribution network column according to claim 2, wherein the directional ultrahigh frequency sensor module comprises a directional ultrahigh frequency sensor, a radio frequency amplifier, a band elimination filter and an envelope detector, and the directional ultrahigh frequency sensor is sequentially connected with the radio frequency amplifier, the band elimination filter and the envelope detector.
5. The system for detecting the device fault discharge on the distribution network column according to claim 2, wherein the ultraviolet sensor module comprises an ultraviolet sensor, a photoelectric converter and a voltage follower, and the ultraviolet sensor is sequentially connected with the photoelectric converter and the voltage follower.
6. The system for detecting the device fault discharge on the distribution network column as recited in claim 2, further comprising a video acquisition module including a camera for aiming a detection target by a detection person on the ground.
7. The system for detecting the device fault discharge on the distribution network column according to claim 6, further comprising a program-controlled cradle head connected to the MCU module, wherein the directional UHF sensor module, the ultraviolet sensor module and the video acquisition module are all installed on the program-controlled cradle head, and a lens direction of the video acquisition module, a main direction of the directional UHF sensor module and a detection direction of the ultraviolet sensor module are consistent.
8. The system for detecting the equipment fault discharge on the distribution network column according to claim 7, further comprising a mobile inspection device, wherein the power frequency electric field sensor module, the directional ultrahigh frequency sensor module, the ultraviolet sensor module, the video acquisition module, the program control holder, the multi-path AD continuous conversion module, the MCU module and the communication module are all arranged above the mobile inspection device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921299482.XU CN210923870U (en) | 2019-08-12 | 2019-08-12 | Detection system for equipment fault discharge on distribution network column |
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| CN201921299482.XU CN210923870U (en) | 2019-08-12 | 2019-08-12 | Detection system for equipment fault discharge on distribution network column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389284A (en) * | 2019-08-12 | 2019-10-29 | 平顶山学院 | The detection system and detection method discharged with equipment fault on net post |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389284A (en) * | 2019-08-12 | 2019-10-29 | 平顶山学院 | The detection system and detection method discharged with equipment fault on net post |
| CN110389284B (en) * | 2019-08-12 | 2024-04-26 | 平顶山学院 | Detection system and detection method for equipment fault discharge on distribution network column |
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