CN117092456A - Power cable partial discharge detection device and power failure detection system - Google Patents
Power cable partial discharge detection device and power failure detection system Download PDFInfo
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- CN117092456A CN117092456A CN202310041775.2A CN202310041775A CN117092456A CN 117092456 A CN117092456 A CN 117092456A CN 202310041775 A CN202310041775 A CN 202310041775A CN 117092456 A CN117092456 A CN 117092456A
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
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- 230000008602 contraction Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
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Classifications
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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
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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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
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Computer Networks & Wireless Communication (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a power cable partial discharge detection device, which comprises a partial discharge detection sensor, a power frequency phase detection sensor, a shell, a printed circuit board and a wireless communication module, wherein the partial discharge detection sensor, the power frequency phase detection sensor, the printed circuit board and the wireless communication module are all contained in the shell and are hung on a cable to be detected by the shell; the partial discharge detection sensor and the power frequency phase detection sensor are electrically connected with the printed circuit board and are used for sending signals measured from the cable to be measured to the printed circuit board for processing; the printed circuit board is electrically connected with the wireless communication module and is used for sending the partial discharge information obtained through processing to a terminal for processing the partial discharge information through the wireless communication module. The power cable partial discharge detection device is reasonable in layout, convenient to operate and capable of improving safety, and the power fault detection system is further provided.
Description
Technical Field
The invention belongs to the technical field of electrical engineering, and particularly relates to a power cable partial discharge detection device and a power failure detection system.
Background
The insulation fault is an important cause for causing the faults and damage of the power cable, and the power cable is subjected to periodic partial discharge inspection and long-term partial discharge on-line monitoring, so that the cable fault can be effectively discovered and intervened in advance, and the electricity safety is ensured.
In the existing partial discharge detection device, a sensor and a processing module are separated, and after the sensor is installed on a cable to be detected, on-site wiring treatment is further carried out, so that the operation process is very complicated, the operation process is limited by lines, the working range of workers is limited, the workers are close to the cable to be detected, and the safety is difficult to guarantee.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a power cable partial discharge detection device which is reasonable in layout, convenient to operate and capable of improving safety.
The invention provides a power cable partial discharge detection device, which comprises a partial discharge detection sensor, a power frequency phase detection sensor, a shell, a printed circuit board and a wireless communication module, wherein the partial discharge detection sensor, the power frequency phase detection sensor, the printed circuit board and the wireless communication module are all contained in the shell and are hung on a cable to be detected by the shell; the partial discharge detection sensor and the power frequency phase detection sensor are electrically connected with the printed circuit board, the partial discharge detection sensor is used for acquiring a first electromagnetic wave signal in the cable to be detected, the power frequency phase detection sensor is used for acquiring a second electromagnetic wave signal in the cable to be detected, and the first electromagnetic wave signal and the second electromagnetic wave signal are respectively sent to the printed circuit board to be processed to obtain partial discharge information; the printed circuit board is electrically connected with the wireless communication module and is used for sending the partial discharge information obtained through processing to a terminal for processing the partial discharge information through the wireless communication module.
Preferably, the partial discharge detection sensor and the power frequency phase detection sensor are arranged on a detachable annular structure which is arranged around the cable to be detected, the power frequency phase detection sensor is attached to one side of the cable to be detected, and the second electromagnetic wave signal inside the cable to be detected is received through space electromagnetic coupling; the partial discharge detection sensor is attached to the other side of the cable to be detected, and receives a first electromagnetic wave signal inside the cable to be detected through space electromagnetic coupling.
Preferably, the partial discharge detection sensor comprises a flexible circuit board, a copper sheet and a plastic sealing layer, wherein the copper sheet is paved on the surface of the flexible circuit board, and the plastic sealing layer is hermetically coated on the outer part of the flexible circuit board paved with the copper sheet.
Preferably, the power frequency phase detection sensor is connected to an inner wall of one side of the casing, the casing is provided with a strip-shaped hole and a connecting portion, the strip-shaped hole and the connecting portion are respectively arranged at two side edges of the side wall where the power frequency phase detection sensor is located, the partial discharge detection sensor is contained in the casing in a extractable manner, the extraction end of the partial discharge detection sensor is extracted from the strip-shaped hole and is detachably connected to the connecting portion, and thus the partial discharge detection sensor and the power frequency phase detection sensor form a detachable annular structure which is arranged around a cable to be detected together.
Preferably, the power cable partial discharge detection device further comprises a shrinkage control mechanism, the shrinkage control mechanism comprises a coil spring and a brake button, the coil spring is accommodated in the shell, one end of the partial discharge detection sensor is wound on the coil spring, automatic winding is achieved through the coil spring, the other end of the partial discharge detection sensor is arranged at the strip-shaped hole as a drawing-out end, and the brake button penetrates through the shell and compresses the partial discharge detection sensor wound on the coil spring, and is used for braking the position of the partial discharge detection sensor after drawing out.
Preferably, the extraction end of the partial discharge detection sensor is provided with a hook-shaped buckle, the connecting part is a rod piece, two ends of the connecting part are connected to the outer wall of the shell, and a gap is reserved between the connecting part and the outer wall of the shell and used for hanging the hook-shaped buckle.
Preferably, the power cable partial discharge detection device further comprises a battery, the battery and the power frequency phase detection sensor are connected to the same side inner wall of the shell, the printed circuit board is connected to the other side inner wall of the shell opposite to the battery and the power frequency phase detection sensor, and the battery is electrically connected with the printed circuit board and used for supplying power to the printed circuit board.
Preferably, the printed circuit board is provided with a partial discharge detection acquisition circuit, a cache FIFO circuit and a processor unit circuit, the partial discharge detection acquisition circuit, the cache FIFO circuit and the partial discharge detection sensor form a partial discharge detection channel circuit together and are used for acquiring and storing a first electromagnetic wave signal, the partial discharge detection acquisition circuit comprises a first signal conditioning circuit, a first gain amplification circuit and a first analog-to-digital conversion circuit, and the first gain amplification circuit is provided with a multi-gear amplification gear and is controlled by the processor unit circuit to switch the gear.
Preferably, the printed circuit board is provided with a power frequency synchronous detection acquisition circuit and a processor unit circuit, and the power frequency synchronous detection acquisition circuit and the power frequency phase detection sensor jointly form a power frequency phase detection channel circuit for synchronously acquiring the second electromagnetic wave signal with the first electromagnetic wave signal.
The invention provides a power failure detection system, which comprises a terminal and the power cable partial discharge detection device, wherein the power cable partial discharge detection device is in wireless communication connection with the terminal and is used for sending detected partial discharge information of a power cable to the terminal for processing.
The power cable partial discharge detection device provided by the invention has the advantages that the partial discharge detection sensor, the power frequency phase detection sensor, the printed circuit board and the wireless communication module are all accommodated in the shell and are hung on the cable to be detected by the shell. That is, each sensor and the printed circuit board serving as a processing module part are integrated in the same shell, and when in use, only the cable to be tested is needed to be hung on site.
And the printed circuit board is in wireless communication connection with the terminal through the wireless communication module, so that the position relationship between the device and the terminal is not limited by a circuit any more, and workers and the terminal can be processed at any safe positions, thereby effectively guaranteeing the personal safety of the workers.
Drawings
Fig. 1 is a schematic diagram of a partial discharge detection device for a power cable in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram showing the installation of a partial discharge detection device for a power cable in embodiment 1 of the present invention;
fig. 3 is a schematic circuit layout of a partial discharge detection device for a power cable according to embodiment 1 of the present invention.
In the figure: 1. a housing; 11. a bar-shaped hole; 12. a connection part; 2. a partial discharge detection sensor; 21. hook-type buckle; 3. a power frequency phase detection sensor; 4. a printed circuit board; 41. a partial discharge detection acquisition circuit; 42. a cache FIFO circuit; 43. a processor unit circuit; 44. the power frequency synchronous detection acquisition circuit; 45. toggling the key; 46. an indicator light; 47. a key display circuit; 5. a cable to be tested; 6. a contraction control mechanism; 61. a coil spring; 62. a brake button; 7. a battery; 71. a power supply conversion circuit; 8. a wireless communication module; 9. and (5) a terminal.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent, and the embodiments described in detail, but not necessarily all, in connection with the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that, the terms "upper," "lower," and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, and are merely for convenience and simplicity of description, and do not indicate or imply that the apparatus or element in question must be provided with a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "configured," "mounted," "secured," and the like are to be construed broadly and may be either fixedly connected or detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Example 1
As shown in fig. 1 and 2, the power cable partial discharge detection device of the present embodiment includes a partial discharge detection sensor 2 and a power frequency phase detection sensor 3, and further includes a housing 1, a printed circuit board 4 and a wireless communication module 8, where the partial discharge detection sensor 2, the power frequency phase detection sensor 3, the printed circuit board 4 and the wireless communication module 8 are all accommodated in the housing 1 and are hung on a cable 5 to be detected by the housing 1. That is, each sensor and the printed circuit board 4 serving as a processing module part are integrated in the same shell 1, when in field use, only the cable 5 to be tested is needed to be hung, field wiring between each internal part is not needed, each sensor is not needed to be installed independently, the reasonable layout mode simplifies the operation process, and the installation and disassembly efficiency is improved.
The partial discharge detection sensor 2 and the power frequency phase detection sensor 3 are electrically connected with the printed circuit board 4, the partial discharge detection sensor 2 is used for acquiring a first electromagnetic wave signal in the cable 5 to be detected, the power frequency phase detection sensor 3 is used for acquiring a second electromagnetic wave signal in the cable 5 to be detected, and the first electromagnetic wave signal and the second electromagnetic wave signal are respectively sent to the printed circuit board 4 to be processed to obtain partial discharge information; the printed circuit board 4 is electrically connected to the wireless communication module 8 for transmitting the processed partial discharge information to the terminal 9 for processing the partial discharge information through the wireless communication module 8. In the connection mode, the position relationship between the device and the terminal 9 is not limited by the circuit any more, and the staff and the terminal can be processed at any safe position, so that the personal safety of the staff is effectively ensured.
In the use process, the partial discharge detection sensor 2 and the power frequency phase detection sensor 3 send a first electromagnetic wave signal and a second electromagnetic wave signal to the printed circuit board 4, the first electromagnetic wave signal is used for calculating the discharge capacity of partial discharge, the second electromagnetic wave signal is used for calculating the power frequency period and the synchronous phase, and the printed circuit board 4 integrates and synchronously sends two paths of signals to the terminal 9 by taking time as a reference.
The terminal 9 may be loaded with partial discharge detection software, and when the terminal 9 performs processing, the frequency of the conventional power frequency phase detection sensor 3 is 50Hz, that is, the period is 20ms, and when the processing in this embodiment uses the phase 360 ° to replace 20ms, the second electromagnetic wave signal is used as a phase map, the first electromagnetic wave signal is placed into the phase map according to a timestamp, and whether the discharge signal of the first electromagnetic wave signal belongs to interference and the type of the discharge signal is determined by analyzing the phase correlation. Through the processing procedure, the primarily acquired first electromagnetic wave signal can be subjected to the processing equivalent to denoising, so that more accurate and effective partial discharge information is obtained. The process of eliminating the interference to the partial discharge by the power frequency phase is a mature process at present, so that specific details thereof are known to those skilled in the art and are not described herein.
In this embodiment, the partial discharge detection sensor 2 and the power frequency phase detection sensor 3 are arranged on a detachable annular structure that is disposed around the cable 5 to be tested, the power frequency phase detection sensor 3 is attached to one side of the cable 5 to be tested, and receives the second electromagnetic wave signal inside the cable 5 to be tested through space electromagnetic coupling; the partial discharge detection sensor 2 is attached to the other side of the cable 5 to be detected, and receives a first electromagnetic wave signal inside the cable 5 to be detected through space electromagnetic coupling. Namely, the two are detected on the same axial position of the cable to be detected, so that errors caused by the installation position are eliminated, and the detection precision is further improved.
In this embodiment, the partial discharge detection sensor 2 includes a flexible circuit board, a copper sheet and a plastic layer, the flexible circuit board is a single-layer flexible circuit board with a length of 280mm, a width of 38mm and an FPC material, the copper sheet is laid on the surface of the flexible circuit board, and the plastic layer is sealed and coated on the outside of the flexible circuit board on which the copper sheet is laid. The arrangement mode enables the partial discharge detection sensor 2 to be of a flexible structure, can be conveniently rolled and unfolded, reduces the size of the sensor, and simultaneously helps to miniaturize the device. The thickness of the plastic sealing layer is 0.2mm, and the external dimensions of the partial discharge detection sensor 2 after plastic sealing are about 300mm in length, 40mm in width and 1.5mm in thickness. Namely, the area of the plastic sealing layer exceeds the area of the flexible circuit board, and the exceeding part can be connected with the shrinkage control mechanism 6 and the hook-shaped buckle 21, so that the influence on the circuit board body is avoided.
In this embodiment, the power frequency phase detection sensor 3 is connected to an inner wall of one side of the housing 1, the housing 1 is provided with a strip hole 11 and a connecting portion 12, the strip hole 11 and the connecting portion 12 are respectively disposed at two side edges on the side wall where the power frequency phase detection sensor 3 is located, the partial discharge detection sensor 2 is contained in the housing 1 in a extractable manner, and an extraction end of the partial discharge detection sensor is extracted from the strip hole 11 and detachably connected to the connecting portion 12, so that a detachable annular structure surrounding the cable 5 to be tested is formed together with the power frequency phase detection sensor 3.
When detection is needed, the side wall of the shell 1 with the power frequency phase detection sensor 3 is attached to the cable 5 to be detected, and then the partial discharge detection sensor 2 is pulled out to wrap the cable 5 to be detected and then connected to the connecting part 12. After the detection is completed, the partial discharge detection sensor 2 is detached from the connection portion 12, and then the apparatus body can be removed. Through this operation process, can see that this device structural arrangement is reasonable, can conveniently quick carry out the device installation and detach, do not need to attach each sensor in proper order, connecting wire, demolish the circuit, demolish loaded down with trivial details operations such as each sensor, improved on-the-spot staff's efficiency.
In this embodiment, the power cable partial discharge detection apparatus further includes a shrinkage control mechanism 6, the shrinkage control mechanism 6 includes a coil spring 61 and a brake button 62, the coil spring 61 is accommodated in the housing 1, one end of the partial discharge detection sensor 2 is wound on the coil spring 61, automatic winding is achieved by the coil spring 61, the other end is provided as a drawing-out end at the bar-shaped hole 11, and the brake button 62 penetrates the housing 1 and presses the partial discharge detection sensor 2 wound on the coil spring 61 for braking a position after the partial discharge detection sensor 2 is drawn out.
The partial discharge detection sensor 2 is reeled and pulled out by utilizing the structural principle of the tape measure, and the structural arrangement ensures that the partial discharge detection sensor 2 is very fast and convenient to be reeled and released, so that the device can carry out efficient loading and unloading operation.
In this embodiment, the extraction end of the partial discharge detection sensor 2 is provided with a hook-shaped buckle 21, the connection portion 12 is a rod, two ends of the rod are connected to the outer wall of the housing 1, and a gap is left between the connection portion 12 and the outer wall of the housing 1 for hanging the hook-shaped buckle 21. The hook-shaped buckle 21 arranged at the extraction end plays a role of hooking the connecting part 12 and can serve as a limiting piece to prevent the partial discharge detection sensor 2 from wholly entering the strip-shaped hole 11, so that the partial discharge detection sensor is convenient to extract.
In this embodiment, the power cable partial discharge detection device further includes a battery 7, the power frequency phase detection sensor 3 is a rectangular copper sheet electrode plate with a length of 40mm, a width of 40mm and a thickness of 1mm, and the printed circuit board 4 is a circuit board with an FR-4 length of 41mm, a width of 40mm and a thickness of 1.6 mm.
In this embodiment, the battery 7 and the power frequency phase detection sensor 3 are connected to the same side inner wall of the housing 1, and the printed circuit board 4 is connected to the other side inner wall of the housing 1 opposite to the battery 7. The layout fully utilizes the internal space of the shell 1, so that the shell 1 can adopt a cuboid plastic shell with the length of 60mm, the width of 45mm and the height of 30mm, and the wall thickness is 1.5mm.
A toggle button 45 and an indicator lamp 46 can be arranged on the printed circuit board 4, and the toggle button 45 is used for switching on and switching off the whole device; the indicator lamp 46 may be provided with a plurality of lamps for indicating different conditions, in this embodiment, the indicator lamp comprises two LED indicator lamps, wherein a red lamp represents an alarm indicator lamp, a green lamp represents an operation indicator lamp, and if the device is self-checked to be normal and works normally after being started, the red lamp is turned off, and the green lamp flashes once every 5 seconds; if the equipment is abnormal, if the battery quantity is too low, the red lamp flashes once every 1 second; if the device is abnormal, if Bluetooth is not connected with the tablet personal computer, the red lamp flashes once every 5 seconds; when the power of the equipment is too low to start, all lamps are extinguished. The flashing, the on/off of the lamp are only illustrative examples, and may be realized by a conventional key display control circuit in the market, or the key display circuit 47 may be disposed on the printed circuit board 4, and the specific structure and the implementation principle thereof will not be described herein.
The partial discharge detection sensor 2 is connected to the printed circuit board 4 through a copper wire, and the center of the power frequency phase detection sensor 3 is welded with the copper wire and connected to the printed circuit board 4. The battery 7 is a 9V dry cell which is electrically connected to the printed circuit board 4 for supplying power to the printed circuit board 4
Because the battery 7 is also integrated in the device body, the device does not need an external power supply when in use, not only further simplifies the installation operation, but also can not be limited by the external power supply, and has wider application range.
When the device is used, the partial discharge detection sensor 2 is pulled out from the strip-shaped hole 11, the hook-shaped buckle 21 is fixed on the connecting part 12 after the cable 5 to be detected is wound, after the device is started, a detector holds the terminal provided with the partial discharge detection measurement software, a detection test is carried out at a safe distance of about 5 meters from the test point, and the safety of field personnel is effectively ensured by transmitting signals in a wireless mode.
In this embodiment, the wireless communication module 8 may be a bluetooth antenna, and the terminal 9 may be a tablet computer or other device loaded with partial discharge detection software, and performs data communication with the printed circuit board 4 in a bluetooth manner.
In this embodiment, as shown in fig. 3, the printed circuit board 4 is provided with a partial discharge detection acquisition circuit 41, a cache FIFO circuit 42 and a processor unit circuit 43, where the partial discharge detection acquisition circuit 41, the cache FIFO circuit 42 and the partial discharge detection sensor 2 together form a partial discharge detection channel circuit for acquiring and storing the first electromagnetic wave signal. The cache FIFO circuit 42 comprises a first-in first-out cache chip.
The partial discharge detection acquisition circuit 41 includes a first signal conditioning circuit, a first gain amplification circuit, and a first analog-to-digital conversion circuit. The first signal conditioning circuit comprises a current-to-voltage conversion circuit and a band-pass filter circuit, and the bandwidth of the band-pass filter circuit is 100 kHz-2 MHz. The gain amplification gear of the first gain amplification circuit is three gear, respectively 10 times, 100 times and 200 times, and the gear switching is controlled by the processor unit circuit 43. The first analog-to-digital conversion circuit is an ADC acquisition circuit with a sampling rate of 5 Msps. The processor unit circuit 43 is an STM32 series single chip microcomputer circuit.
In this embodiment, the printed circuit board 4 is further provided with a power frequency synchronous detection and acquisition circuit 44, and the power frequency synchronous detection and acquisition circuit 44 and the power frequency phase detection sensor 3 jointly form a power frequency phase detection channel circuit for synchronously acquiring the second electromagnetic wave signal with the first electromagnetic wave signal.
The power frequency synchronous detection and acquisition circuit 44 comprises a second signal conditioning circuit, a second gain amplifying circuit and a second analog-to-digital conversion circuit. The second signal conditioning circuit is a low-pass filter circuit, and the bandwidth of the low-pass filter circuit is 0 Hz-300 Hz; the second gain amplifying circuit is a signal amplifying circuit of 10 times; the second analog-to-digital conversion circuit is an ADC acquisition circuit with a sampling rate of 200 ksps.
In this embodiment, the battery 7 is further provided with a power conversion circuit 71, the power conversion circuit 71 is disposed on the printed circuit board 4, and the power conversion circuit 71 controls the battery 7 to supply power to all the above circuits.
Example 2
The power failure detection system disclosed in this embodiment includes a terminal 9 and the power cable partial discharge detection device in embodiment 1, where the power cable partial discharge detection device is connected to the terminal 9 in a wireless communication manner, and is configured to send detected partial discharge information of the power cable to the terminal 9 for processing.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a power cable partial discharge detection device, includes partial discharge detection sensor (2) and power frequency phase detection sensor (3), its characterized in that: also comprises a shell (1), a printed circuit board (4) and a wireless communication module (8),
the partial discharge detection sensor (2), the power frequency phase detection sensor (3), the printed circuit board (4) and the wireless communication module (8) are all contained in the shell (1) and are hung on the cable (5) to be detected by the shell (1);
the partial discharge detection sensor (2) and the power frequency phase detection sensor (3) are electrically connected with the printed circuit board (4), the partial discharge detection sensor (2) is used for acquiring a first electromagnetic wave signal inside the cable (5) to be detected, the power frequency phase detection sensor (3) is used for acquiring a second electromagnetic wave signal inside the cable (5) to be detected, and the first electromagnetic wave signal and the second electromagnetic wave signal are respectively sent to the printed circuit board (4) to be processed to obtain partial discharge information;
the printed circuit board (4) is electrically connected with the wireless communication module (8) and is used for sending the partial discharge information obtained through processing to the terminal (9) for processing the partial discharge information through the wireless communication module (8).
2. The power cable partial discharge detection apparatus according to claim 1, wherein: the partial discharge detection sensor (2) and the power frequency phase detection sensor (3) are arranged on a detachable annular structure which is arranged around the cable (5) to be tested,
the power frequency phase detection sensor (3) is attached to one side of the cable (5) to be detected, and receives a second electromagnetic wave signal inside the cable (5) to be detected through space electromagnetic coupling; the partial discharge detection sensor (2) is attached to the other side of the cable (5) to be detected, and receives a first electromagnetic wave signal inside the cable (5) to be detected through space electromagnetic coupling.
3. The power cable partial discharge detection apparatus according to claim 2, wherein: the partial discharge detection sensor (2) comprises a flexible circuit board, a copper sheet and a plastic sealing layer,
the copper sheet is paved on the surface of the flexible circuit board, and the plastic sealing layer is coated on the outer part of the flexible circuit board paved with the copper sheet in a sealing way.
4. A power cable partial discharge detection apparatus according to claim 2 or 3, characterized in that: the power frequency phase detection sensor (3) is connected to the inner wall of one side of the shell (1),
the shell (1) is provided with a strip-shaped hole (11) and a connecting part (12), the strip-shaped hole (11) and the connecting part (12) are respectively arranged at the edges of two sides of the side wall where the power frequency phase detection sensor (3) is arranged,
the partial discharge detection sensor (2) is contained in the shell (1) in a extractable mode, the extraction end of the partial discharge detection sensor is extracted from the strip-shaped hole (11) and is detachably connected to the connecting portion (12), and therefore a detachable annular structure which is arranged around the cable (5) to be detected is formed together with the power frequency phase detection sensor (3).
5. The power cable partial discharge detection apparatus according to claim 4, wherein: also comprises a contraction control mechanism (6), wherein the contraction control mechanism (6) comprises a coil spring (61) and a brake button (62),
the coil spring (61) is accommodated in the shell (1), one end of the partial discharge detection sensor (2) is wound on the coil spring (61), automatic winding is realized through the coil spring (61), the other end is used as a drawing-out end and is arranged at the strip-shaped hole (11),
the brake button (62) penetrates through the shell (1) and presses the partial discharge detection sensor (2) wound on the coil spring (61) to brake the position of the partial discharge detection sensor (2) after being pulled out.
6. The power cable partial discharge detection apparatus according to claim 5, wherein: the extraction end of the partial discharge detection sensor (2) is provided with a hook-shaped buckle (21),
the connecting part (12) is a rod piece, two ends of the rod piece are connected to the outer wall of the shell (1), a gap is reserved between the connecting part (12) and the outer wall of the shell (1), and the rod piece is used for hanging a hook-shaped buckle (21).
7. The power cable partial discharge detection apparatus according to claim 4, wherein: also comprises a battery (7),
the battery (7) and the power frequency phase detection sensor (3) are connected on the inner wall of the same side of the shell (1), the printed circuit board (4) is connected on the inner wall of the other side of the shell (1) opposite to the battery and the power frequency phase detection sensor,
the battery (7) is electrically connected with the printed circuit board (4) and is used for supplying power to the printed circuit board (4).
8. The power cable partial discharge detection apparatus according to claim 2, wherein: the printed circuit board (4) is provided with a partial discharge detection acquisition circuit (41), a cache FIFO circuit (42) and a processor unit circuit (43), the partial discharge detection acquisition circuit (41), the cache FIFO circuit (42) and the partial discharge detection sensor (2) form a partial discharge detection channel circuit together for acquiring and storing a first electromagnetic wave signal,
the partial discharge detection acquisition circuit (41) comprises a first signal conditioning circuit, a first gain amplification circuit and a first analog-to-digital conversion circuit, wherein the first gain amplification circuit is provided with a plurality of amplifying gears, and the processor unit circuit (43) controls gear switching.
9. The power cable partial discharge detection apparatus according to claim 2, wherein: the printed circuit board (4) is provided with a power frequency synchronous detection acquisition circuit (44) and a processor unit circuit (43), and the power frequency synchronous detection acquisition circuit (44) and the power frequency phase detection sensor (3) jointly form a power frequency phase detection channel circuit for synchronously acquiring a second electromagnetic wave signal with the first electromagnetic wave signal.
10. A power failure detection system, characterized by: comprising a terminal (9) and a power cable partial discharge detection device according to any one of claims 1 to 9, which is in wireless communication with the terminal (9) for transmitting detected power cable partial discharge information to the terminal (9) for processing.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204287402U (en) * | 2014-12-31 | 2015-04-22 | 国家电网公司 | A kind of overground cable shelf depreciation live detection sensor |
| WO2016016199A1 (en) * | 2014-07-28 | 2016-02-04 | Alstom Technology Ltd | Device for detecting a partial discharge from gas-insulated high-voltage equipment, and associated high-voltage electrical substation |
| CN105606975A (en) * | 2016-03-09 | 2016-05-25 | 武汉华威众科电力有限公司 | Localizable ultrahigh-frequency cable partial discharge detection method and device |
| CN110687404A (en) * | 2019-08-27 | 2020-01-14 | 西安电子科技大学 | Portable partial discharge detection equipment |
| CN114019333A (en) * | 2021-11-12 | 2022-02-08 | 国网辽宁省电力有限公司电力科学研究院 | Composite sensor for detecting partial discharge ultrahigh frequency electromagnetic signal |
| CN114509651A (en) * | 2022-04-15 | 2022-05-17 | 湖北工业大学 | GIS partial discharge external ultrasonic and ultrahigh frequency integrated sensor and detection method |
| CN114609484A (en) * | 2022-01-25 | 2022-06-10 | 盐城电力设计院有限公司 | Partial discharge on-line detection system for power transmission and transformation equipment |
| CN114689998A (en) * | 2022-02-22 | 2022-07-01 | 上海格鲁布科技有限公司 | Portable dial partial discharge detection device, system and method |
| KR20220131704A (en) * | 2021-03-22 | 2022-09-29 | 한국전력공사 | Apparatus for detecting partial discharge and method thereof |
-
2023
- 2023-01-12 CN CN202310041775.2A patent/CN117092456B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016016199A1 (en) * | 2014-07-28 | 2016-02-04 | Alstom Technology Ltd | Device for detecting a partial discharge from gas-insulated high-voltage equipment, and associated high-voltage electrical substation |
| CN204287402U (en) * | 2014-12-31 | 2015-04-22 | 国家电网公司 | A kind of overground cable shelf depreciation live detection sensor |
| CN105606975A (en) * | 2016-03-09 | 2016-05-25 | 武汉华威众科电力有限公司 | Localizable ultrahigh-frequency cable partial discharge detection method and device |
| CN110687404A (en) * | 2019-08-27 | 2020-01-14 | 西安电子科技大学 | Portable partial discharge detection equipment |
| KR20220131704A (en) * | 2021-03-22 | 2022-09-29 | 한국전력공사 | Apparatus for detecting partial discharge and method thereof |
| CN114019333A (en) * | 2021-11-12 | 2022-02-08 | 国网辽宁省电力有限公司电力科学研究院 | Composite sensor for detecting partial discharge ultrahigh frequency electromagnetic signal |
| CN114609484A (en) * | 2022-01-25 | 2022-06-10 | 盐城电力设计院有限公司 | Partial discharge on-line detection system for power transmission and transformation equipment |
| CN114689998A (en) * | 2022-02-22 | 2022-07-01 | 上海格鲁布科技有限公司 | Portable dial partial discharge detection device, system and method |
| CN114509651A (en) * | 2022-04-15 | 2022-05-17 | 湖北工业大学 | GIS partial discharge external ultrasonic and ultrahigh frequency integrated sensor and detection method |
Non-Patent Citations (2)
| Title |
|---|
| MM YAACOB 等: "Review on Partial Discharge Detection Techniques Related to High Voltage Power Equipment Using Different Sensors", OHOTONIC SENSORS, vol. 4, no. 4, 31 December 2014 (2014-12-31), pages 325 - 337, XP055691222, DOI: 10.1007/s13320-014-0146-7 * |
| 邵先军;何文林;石华军;周兴杨;刘浩军;徐华;: "UHF传感器GIS局部放电检测特性的实验研究", 高压电器, no. 01, 16 January 2015 (2015-01-16), pages 46 - 55 * |
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