CN216848010U - Cable partial discharge online monitoring device for edge calculation - Google Patents
Cable partial discharge online monitoring device for edge calculation Download PDFInfo
- Publication number
- CN216848010U CN216848010U CN202220076934.3U CN202220076934U CN216848010U CN 216848010 U CN216848010 U CN 216848010U CN 202220076934 U CN202220076934 U CN 202220076934U CN 216848010 U CN216848010 U CN 216848010U
- Authority
- CN
- China
- Prior art keywords
- discharge
- signal
- module
- data
- monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to the technical field of cable partial discharge monitoring, and discloses an edge-computed cable partial discharge online monitoring device, which comprises a signal acquisition module, a signal conditioning module, an AD conversion module, an FPGA module, a singlechip and a power module, wherein the signal conditioning module is used for filtering and amplifying a discharge signal acquired by the signal acquisition module; the AD conversion module is used for receiving the output signal of the signal conditioning module and performing AD conversion on the output signal to generate a discharge pulse signal; the FPGA module is used for sampling the discharge pulse signal and performing FFT (fast Fourier transform) spectrum calculation on the discharge pulse signal to obtain discharge pulse data; the single chip microcomputer is used for processing the discharge pulse data and transmitting a processing result to the data processing monitoring background. The utility model discloses put data processing, categorised calculation with the office and put IED data acquisition equipment, improve the ability that the data was put in the processing office of IED data acquisition equipment.
Description
Technical Field
The utility model relates to a cable partial discharge monitoring technology field, concretely relates to cable partial discharge on-line monitoring device of edge calculation.
Background
The cable comprises a sensor, an IED data acquisition device and a data processing monitoring background, wherein the IED data acquisition device is mainly responsible for partial discharge signal acquisition, and the data processing monitoring background is responsible for partial discharge logic judgment, partial discharge type identification and partial discharge map display. In the existing scheme, the front-end IED data acquisition device is mainly responsible for sampling and filtering partial discharge data, and processes such as partial discharge data processing, map generation, alarm logic determination, partial discharge type classification and the like are processed by the main monitoring host of the data processing monitoring background, and as the number of the IED data acquisition devices increases, the calculation and storage pressure of the main monitoring host is too high, so that partial discharge data processing is not timely.
SUMMERY OF THE UTILITY MODEL
The utility model provides an online monitoring device is put in cable office of edge calculation improves the ability that the data were put in the processing office of IED data acquisition equipment, puts data processing, categorised calculation with the office and puts IED data acquisition equipment, reduces the data processing pressure of central node host computer (main supervisory computer).
The utility model discloses a following technical scheme realizes:
an edge-computing cable partial discharge online monitoring device is arranged in IED data acquisition equipment and comprises a signal acquisition module, a signal conditioning module, an AD conversion module, an FPGA module, a singlechip and a power supply module, wherein,
the power supply module supplies power to the signal conditioning module, the AD conversion module, the FPGA module and the singlechip;
the signal acquisition module is used for acquiring partial discharge signals of the cable;
the signal conditioning module is used for filtering and amplifying the discharge signal acquired by the signal acquisition module;
the AD conversion module is used for receiving the output signal of the signal conditioning module and performing AD conversion on the output signal to generate a discharge pulse signal;
the FPGA module is used for sampling the discharge pulse signal and performing FFT (fast Fourier transform) spectrum calculation on the discharge pulse signal to obtain discharge pulse data;
the single chip microcomputer is used for processing the discharge pulse data and transmitting a processing result to the data processing monitoring background.
Preferably, the signal acquisition module is a current sensor.
And as optimization, the FPGA module comprises a sampling signal preprocessing unit, the sampling rate of the sampling signal preprocessing unit is 100MS/s, and the pulse duration is 10.24 us.
As optimization, the single chip microcomputer comprises a logic processing unit, a synchronization unit and a communication unit;
the logic processing unit is used for judging discharge alarm, generating a PRPD map and PRPS information, classifying discharge types, storing the corresponding PRPD map and PRPS information only when discharge pulse data are determined to be discharge alarm, and calculating equivalent time and equivalent frequency to generate a TF map and a pulse waveform frequency spectrum;
the synchronization unit is used for generating an internal synchronization signal of the singlechip or processing a pulse synchronization signal obtained by a power frequency power supply;
and the communication unit is used for transmitting a processing result obtained after the processing of the logic processing unit to the data processing monitoring background.
As an optimization, the discharge alarm judgment performed by the logic processing unit specifically comprises: and receiving the discharge pulse data and judging whether the discharge pulse data exceeds a set threshold, and if the discharge pulse data exceeds the set threshold, determining the discharge pulse data as discharge alarm data.
As optimization, an NNOM library is arranged in the logic processing unit, and classified data of cable discharge information is stored in the NNOM library.
And as optimization, the communication unit is in communication connection with the data processing monitoring background through Ethernet or optical fiber.
As optimization, the system also comprises a display, and the display is electrically connected with the single chip microcomputer.
And as optimization, the processing result comprises a TF (TransFlash) map, a pulse waveform frequency spectrum, discharge pulse data judged to be a discharge alarm, a discharge type corresponding to the discharge pulse data and the accuracy rate of judging the discharge type.
As optimization, the single chip microcomputer adopts SMT32F429 ZETx.
For optimization, the FPGA module adopts EP4CE15F23I 7N.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses put data processing, categorised calculation with the office and put IED data acquisition equipment, improve the ability that the data were put in the processing office of IED data acquisition equipment, alleviate the data processing pressure of central node host computer (main supervisory computer).
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of an edge-computed cable partial discharge online monitoring device according to the present invention;
FIG. 2 is a circuit diagram of a signal conditioning module;
FIG. 3 is a circuit diagram of the AD conversion module;
FIG. 4 is a block diagram of an FPGA connected to an AD conversion module;
fig. 5 is a pin diagram of the single chip microcomputer and a block diagram of the FPGA connected to the single chip microcomputer.
Reference numbers and corresponding part names in the drawings:
the system comprises a signal acquisition module, a signal conditioning module 2, a 3-AD conversion module, a 4-FPGA module and a 5-single chip microcomputer.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
The embodiment provides an edge-computing cable partial discharge online monitoring device, which is arranged in IED data acquisition equipment as shown in fig. 1, and includes a signal acquisition module 1, a signal conditioning module 2, an AD conversion module 3, an FPGA module 4, a single chip 5, and a power supply module 6, wherein,
the power module 1 supplies power for the signal conditioning module 2, the AD conversion module 3, the FPGA module 4 and the singlechip 5.
The power module is composed of an ACDC power supply, a power management chip and a peripheral circuit, (the power module is in the prior art, and can be set by a person skilled in the art according to actual conditions, and is not described herein) to provide power for each chip of the whole device. The Power Management chip (Power Management Integrated Circuits) is a chip which plays roles of conversion, distribution, detection and other electric energy Management on electric energy in an electronic equipment system and is mainly responsible for identifying the Power supply amplitude of a CPU (Central processing Unit), generating corresponding short moment waves and pushing a rear-stage circuit to output Power. The commonly used power management chip comprises LMG3410R050, UCC12050, BQ25790, HIP6301, IS6537, RT9237, ADP3168, KA7500, TL494 and the like.
The signal acquisition module 2 is used for acquiring a partial discharge signal of the cable, and specifically, the signal acquisition module acquires a signal of a partial discharge sensor arranged on the cable; in this embodiment, the signal acquisition module is a current sensor, and particularly, a high-frequency current sensor.
As shown in fig. 2, is a signal conditioning module 3. The signal conditioning module 3 is used for filtering and amplifying the discharge signal acquired by the signal acquisition module; the signal conditioning module comprises a chip (LB7, LB6 and U21), a transformer (T2 and T3) and a peripheral filter circuit. The discharging signal collected by the signal collecting module is input through an IN pin of a chip LB7, and is filtered and amplified through a filter circuit and a transformer (T2, T3) of the signal conditioning module, and is input to VIN-VIN + pins of the AD conversion module at the output end of the signal conditioning module IN the form of differential signals.
As shown in fig. 3, an AD conversion module. The AD conversion module is used for receiving the output signal of the signal conditioning module and performing AD conversion on the output signal to generate a discharge pulse signal. The AD conversion module comprises a chip U6, a peripheral circuit of the chip U6 and an AD clock input module, wherein the AD clock input module comprises a chip T1, a crystal oscillator D3 and a peripheral circuit of the crystal oscillator D3 as a right (rotated on the picture 3) side circuit in the picture 3, the output end of the AD clock input module is connected with a CLK + pin and a CLK-pin of the chip U6, the AD clock input module is used for providing frequency for a discharging pulse signal, and the discharging pulse signal of the AD conversion module is transmitted to the FPGA module through an FDI pin group (D0-D11) of the chip U6.
The FPGA module is used for sampling the discharge pulse signals and performing FFT frequency spectrum calculation on the discharge pulse signals to obtain discharge pulse data. In this embodiment, the FPGA module includes a sampling signal preprocessing unit, the sampling signal preprocessing unit uses a programmable logic device, the sampling rate is 100MS/s, the pulse duration is 10.24us, and mainly performs AD sampling, pulse acquisition of the discharge pulse signal, and pulse FFT processing of the discharge pulse signal: and performing an adding (Hanning) window and FFT to obtain the pulse frequency distribution.
The FPGA module collects the pulse signal and performs FFT processing on the pulse signal, which is the prior art, and refer to "CN 202010206723.2 an electrical spectrum monitoring device and method" in which: the FPGA module carries out the technique of FFT operation to the voltage and current data of gathering, consequently, above-mentioned technical scheme does not relate to the improvement of computer program, is utility model's protection scope.
As shown in fig. 4, a picture of a portion where the FPGA module is connected to the AD conversion module is shown. The FDI pin group (D0-D11) of the chip U6 is connected with the FDI pin group of the FPGA module, wherein the FDI pin group of the FPGA module is provided with 3 groups, namely an FDIA pin group, an FDIB pin group and an FDIC pin group, and the FDI pin group of the chip U6 is connected with one FDI pin group of the FPGA module.
As shown in fig. 5, the connection pins refer to fig. 5 for the connection part of the FPGA module and the single chip microcomputer and the picture of the single chip microcomputer.
The single chip microcomputer is used for processing the discharge pulse data and transmitting a processing result to the data processing monitoring background.
In this embodiment, the single chip microcomputer includes a logic processing unit, a synchronization unit, and a communication unit;
the logic processing unit is used for judging discharge alarm, generating a PRPD map and PRPS information, classifying discharge types, storing the corresponding PRPD map and PRPS information only when discharge pulse data are determined to be discharge alarm, and calculating equivalent time and equivalent frequency to generate a TF map and a pulse waveform frequency spectrum;
in this embodiment, the discharge alarm determination performed by the logic processing unit specifically includes: and receiving the discharge pulse data and judging whether the discharge pulse data exceeds a set threshold, and if the discharge pulse data exceeds the set threshold, determining the discharge pulse data as discharge alarm data. Here, whether the discharge pulse data is the discharge alarm data is determined by comparing the actual value of the collected discharge pulse data with the set threshold, for the prior art, reference may be made to the technology in "alarm method, device and system for on-line monitoring of partial discharge of CN201410659791.9 high-voltage cable", and this patent discloses "an alarm method for on-line monitoring of partial discharge of high-voltage cable, which is characterized by including: when the sampling time is up, acquiring monitoring data of the on-line monitoring of the partial discharge of the monitored high-voltage cable; judging whether the deviation between the monitoring data and a set alarm threshold value is larger than a set deviation value or not, and if so, marking the monitoring data as alarm data; therefore, the above technical solution does not relate to the improvement of a computer program, and is a protection scope of the utility model.
The logic processing unit generates corresponding PRPD map and PRPS information after receiving the discharge pulse data, carries out discharge alarm judgment, only when discharge alarm exists, stores the PRPD map and the PRPS information, carries out equivalent time and equivalent frequency calculation to generate TF map and pulse waveform frequency spectrum, obtains TF map through PRPD map, judges the discharge pulse data through TF map as the prior art, and can refer to ' CN202011611022.3 a partial discharge classification and identification method ', the patent discloses ' extracting pulse signals in the original partial discharge data and obtaining the original PRPD map; performing time-frequency analysis on each pulse signal in the original partial discharge data to obtain a TF (Transflash) map of the data; clustering and separating the TF maps; separating and classifying the original PRPD map according to the clustering result of the TF map; the PRPD atlas of each group classification is respectively subjected to discharge recognition, so the technical scheme does not relate to the improvement of a computer program and is a protection range of the utility model.
The classification of discharging adopts the NNOM storehouse that is fit for the singlechip, and neural network model passes through the sample storehouse training study by the host computer when developing, behind the generative model, leading-in NNOM storehouse, has put the classification data of cable discharge information in the NNOM storehouse, MCU only need carry on classification calculation can, this technique also is prior art, does not relate to the improvement of computer program, is utility model's protection scope.
Meanwhile, discharge alarm judgment is carried out, only when discharge alarm exists, the PRPD map and the PRPS information are stored, equivalent time and equivalent frequency are calculated to generate a TF map and a pulse waveform spectrum, the prior art is also referred to, and "CN 202010622742.3 cable online monitoring device and method capable of positioning insulation defects" can be referred to, the patent discloses a cable online monitoring method capable of positioning insulation defects, and the method is characterized by comprising the following steps: step 1, obtaining A, B, C three-phase discharge pulse current signals under the trigger of A, B, C three-phase any one-phase pulse; step 2, acquiring the current amplitude and the corresponding phase of the discharge pulse current signal; step 3, judging whether the current amplitude of the discharging pulse current signal of a certain phase is obviously larger than that of other two phases, if so, judging that partial discharge exists; if not, determining as an interference signal; step 4, when the judgment result is partial discharge, obtaining a related map for determining the defect type through data analysis and processing, comparing the related map with a defect discharge typical map, judging whether the discharge signal is a real discharge signal or not through measurement of a partial discharge signal, discharge signal feature extraction, classification and feature fingerprint library comparison analysis, and determining the defect type; the relevant atlas that detection device obtained includes PRPD spectrogram, TF time-frequency diagram ", above-mentioned patent discloses" carry out discharge alarm and judge in this application, only when there is discharge alarm, keeps PRPD atlas and PRPS information, and carries out equivalent time and equivalent frequency calculation and generates TF atlas and pulse waveform frequency spectrum ", consequently, above-mentioned technical scheme does not relate to the improvement of computer program, is utility model's protection scope.
And finally, transmitting the TF spectrum, the pulse waveform spectrum, the discharge pulse data judged to be discharge alarm, the discharge type corresponding to the discharge pulse data and the accuracy rate of judging the discharge type to a main monitoring host.
The calculation of the accuracy of the discharge type determination is also the prior art, and reference may be made to patents such as "a method and a system for identifying a signal type of a cable partial discharge signal in CN 201810858700.2", "a method and a system for identifying a partial discharge mode in CN 202011637543.6", and so on, which are not described herein again. Therefore, the technical scheme does not relate to the improvement of a computer program, and is the protection range of the utility model.
The synchronization unit is used for generating an internal synchronization signal of the singlechip or processing a pulse synchronization signal obtained by a power frequency power supply;
the communication unit is configured to transmit a processing result obtained after the processing by the logic processing unit to a data processing monitoring background.
In this embodiment, still include the display, the display with the singlechip electricity is connected. The display is used for displaying the collected current value of the partial discharge of the cable.
In this embodiment, the single chip microcomputer adopts SMT32F429 zerox.
In this embodiment, the FPGA module uses EP4CE15F23I 7N.
In the utility model, the calculation is mainly shared by the FPGA module and the single chip Microcomputer (MCU), and is mainly used for the FFT spectrum calculation of the discharge pulse due to the characteristics and resource limitation of the FPGA module, the pulse data and the FFT data are transmitted rapidly through an FSMC local bus of a single chip Microcomputer (MCU) and a DMA controller, the single chip Microcomputer (MCU) generates a PRPD map and PRPS information after receiving the pulse data, and discharge alarm judgment is carried out, only when discharge alarm exists, the PRPD map and the PRPS information, calculating equivalent time and equivalent frequency to generate TF atlas and pulse waveform frequency spectrum, adopting NNOM library suitable for single-chip microcomputer for discharge classification, training and learning neural network model by host through sample library during development, generating model, and (4) importing the NNOM, wherein the MCU only needs to perform classification calculation, and finally, the graph file, the alarm data, the classification result and the probability are sent to the monitoring host. Through the utility model discloses, to single IED data acquisition equipment, the data that send and handle on the data obviously reduce, only show at ordinary times discharge value can, to entire system, the calculated amount of network communication data volume and main supervisory control host computer also reduces by a wide margin, and the data volume is big when only sending alert map data simultaneously on a plurality of IED data acquisition equipment, but the load of main supervisory control host computer obviously reduces.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An edge-computing cable partial discharge online monitoring device is arranged in IED data acquisition equipment and is characterized by comprising a signal acquisition module, a signal conditioning module, an AD conversion module, an FPGA module, a single chip microcomputer and a power supply module, wherein,
the power supply module supplies power to the signal conditioning module, the AD conversion module, the FPGA module and the singlechip;
the signal acquisition module is used for acquiring partial discharge signals of the cable;
the signal conditioning module is used for filtering and amplifying the discharge signal acquired by the signal acquisition module;
the AD conversion module is used for receiving the output signal of the signal conditioning module and performing AD conversion on the output signal to generate a discharge pulse signal;
the FPGA module is used for sampling the discharge pulse signal and performing FFT (fast Fourier transform) spectrum calculation on the discharge pulse signal to obtain discharge pulse data;
the single chip microcomputer is used for processing the discharge pulse data and transmitting a processing result to the data processing monitoring background.
2. The device for monitoring the partial discharge of the cable based on the edge calculation according to claim 1, wherein the signal acquisition module is a current sensor.
3. The device for monitoring the partial discharge of the cable in the edge computing according to claim 1, wherein the FPGA module comprises a sampling signal preprocessing unit, the sampling rate of the sampling signal preprocessing unit is 100MS/s, and the pulse duration is 10.24 us.
4. The device for monitoring the partial discharge of the cable in the edge computing according to claim 1, wherein the single chip microcomputer comprises a logic processing unit, a synchronization unit and a communication unit;
the logic processing unit is used for judging discharge alarm, generating a PRPD map and PRPS information, classifying discharge types, storing the corresponding PRPD map and PRPS information only when discharge pulse data are determined to be discharge alarm, and calculating equivalent time and equivalent frequency to generate a TF map and a pulse waveform frequency spectrum;
the synchronization unit is used for generating an internal synchronization signal of the singlechip or processing a pulse synchronization signal obtained by a power frequency power supply;
and the communication unit is used for transmitting a processing result obtained after the processing of the logic processing unit to the data processing monitoring background.
5. The device for monitoring the partial discharge of the cable according to claim 4, wherein the logic processing unit performs the discharge alarm determination specifically as follows: and receiving the discharge pulse data and judging whether the discharge pulse data exceeds a set threshold, and if the discharge pulse data exceeds the set threshold, determining the discharge pulse data as discharge alarm data.
6. The device for monitoring the partial discharge of the cable according to claim 4, further comprising a display electrically connected to the single chip microcomputer.
7. The device for monitoring the partial discharge of the cable according to claim 4, wherein the communication unit is communicatively connected to the data processing monitoring background via ethernet or optical fiber.
8. The device for monitoring the partial discharge of the cable according to claim 1, further comprising a display, wherein the display is electrically connected to the single chip.
9. The device for monitoring the partial discharge of the cable on the line for the edge calculation according to claim 1, wherein the single chip microcomputer adopts SMT32F429 ZETx.
10. The device for monitoring the partial discharge of the cable on the line for the edge calculation according to claim 1, wherein the FPGA module employs EP4CE15F23I 7N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220076934.3U CN216848010U (en) | 2022-01-12 | 2022-01-12 | Cable partial discharge online monitoring device for edge calculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220076934.3U CN216848010U (en) | 2022-01-12 | 2022-01-12 | Cable partial discharge online monitoring device for edge calculation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216848010U true CN216848010U (en) | 2022-06-28 |
Family
ID=82084099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220076934.3U Active CN216848010U (en) | 2022-01-12 | 2022-01-12 | Cable partial discharge online monitoring device for edge calculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216848010U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115754416A (en) * | 2022-11-16 | 2023-03-07 | 国能大渡河瀑布沟发电有限公司 | Edge calculation-based partial discharge analysis system and method for hydraulic generator |
| CN116400180A (en) * | 2023-05-17 | 2023-07-07 | 国网北京市电力公司检修分公司 | Partial discharge recognition system and method |
-
2022
- 2022-01-12 CN CN202220076934.3U patent/CN216848010U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115754416A (en) * | 2022-11-16 | 2023-03-07 | 国能大渡河瀑布沟发电有限公司 | Edge calculation-based partial discharge analysis system and method for hydraulic generator |
| CN116400180A (en) * | 2023-05-17 | 2023-07-07 | 国网北京市电力公司检修分公司 | Partial discharge recognition system and method |
| CN116400180B (en) * | 2023-05-17 | 2023-11-14 | 国网北京市电力公司检修分公司 | Partial discharge recognition system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216848010U (en) | Cable partial discharge online monitoring device for edge calculation | |
| CN103197218B (en) | A kind of high-voltage cable insulation defect partial discharge electrification detection diagnostic method | |
| CN102841297B (en) | Self-adaptive partial-discharge monitoring method and device for sampling frequency | |
| CN103323755A (en) | Method and system for recognition of GIS ultrahigh frequency partial discharge signal | |
| CN104569694B (en) | Electric signal feature extraction and recognition system oriented to aircraft flying process | |
| CN108693448B (en) | Partial discharge mode recognition system applied to power equipment | |
| CN104198898A (en) | Local discharge development process diagnosis method based on pulse-train analysis | |
| CN115170000A (en) | Remote monitoring method and system based on electric energy meter communication module | |
| CN103558519A (en) | GIS partial discharge ultrasonic signal identification method | |
| CN109615273B (en) | Method and system for evaluating state of electric vehicle charging facility | |
| CN110261746B (en) | Cable defect detection method based on periodic attenuation characteristics of oscillating wave voltage | |
| CN114325256A (en) | Power equipment partial discharge identification method, system, equipment and storage medium | |
| CN110850244A (en) | Local discharge defect time domain map diagnosis method, system and medium based on deep learning | |
| CN113805018A (en) | Intelligent identification method for partial discharge fault type of 10kV cable of power distribution network | |
| CN113655348A (en) | Power equipment partial discharge fault diagnosis method based on deep twin network, system terminal and readable storage medium | |
| CN112986870A (en) | Distributed power transformer winding state monitoring method and system based on vibration method | |
| CN114113943B (en) | Transformer partial discharge detection system, method and equipment based on current and ultrasonic signals | |
| CN112285494A (en) | Power cable partial discharge mode recognition analysis system | |
| CN115617784A (en) | Data processing system and processing method for informationized power distribution | |
| WO2024119983A1 (en) | Anomality detection method and apparatus for cable terminal of rail vehicle | |
| CN117169639B (en) | Product detection method and system for power adapter production | |
| CN104125050A (en) | Ultrahigh-frequency RFID (radio frequency identification) reader protocol conformance testing method | |
| CN104865508A (en) | Partial discharge recognition method based on data grouping quantification | |
| CN117110794A (en) | Intelligent diagnosis system and method for cable faults | |
| CN117033887A (en) | Self-discharge rate calculation method and system for lithium ion battery pack module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |