CN102508135A - Cable oscillation wave local discharge measuring and positioning system based on cloud computing - Google Patents
Cable oscillation wave local discharge measuring and positioning system based on cloud computing Download PDFInfo
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- CN102508135A CN102508135A CN2011103743924A CN201110374392A CN102508135A CN 102508135 A CN102508135 A CN 102508135A CN 2011103743924 A CN2011103743924 A CN 2011103743924A CN 201110374392 A CN201110374392 A CN 201110374392A CN 102508135 A CN102508135 A CN 102508135A
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Abstract
The invention discloses a cable oscillation wave local discharge measuring and positioning system based on cloud computing, which comprises a cloud computing platform and a cloud computing access module, wherein the cloud computing platform comprises a local discharge signal analyzing and positioning system, a local discharge fault feature library, a local discharge mode recognizing system and a cable insulating state evaluating system; the cloud computing access module comprises a signal acquiring system, an oscillation wave generating device, a test cable and a local discharge calibrating instrument; the cloud computing access module has a network communication capability, and can generate a damping oscillation wave to discharge at an insulation defect position, further acquire a wave shape and a data measuring value, and transmit the wave shape and the data measuring value to a cloud computing platform; and the cloud computing platform analyzes and judges local discharge, and evaluates the cable insulating state and predicts a discharge trend so as to detect the local discharge of the cable and evaluate the cable insulating state. By virtue of the cloud computing, the local discharge data processing capability is greatly enhanced and the local discharge recognizing and positioning speed is greatly increased.
Description
Technical field
The present invention relates to power cable Partial Discharge Detection field, be specifically related to a kind ofly based on cloud computing, the method that adopts the wave of oscillation to detect shelf depreciation is carried out the system of measurement of partial discharge and location to cable.
Background technology
Cloud computing is a kind of of distributed computing technology, and it transfers to huge arithmetic system that the multi-section server formed through searching, result being returned to the user after the computational analysis through network with mass data.Can in the several seconds, handle the data of magnanimity through this technological cloud computing platform, reach network service with the same powerful arithmetic capability of supercomputer.That cloud computing has is ultra-large, virtual, high reliability, versatility, high scalability and extremely cheap characteristics.
Shelf depreciation relates to the discharge of electrical system insulator, because the development of shelf depreciation is subject to the defective of insulation system, the partial discharge quantity of cable and its insulation status are closely related, and the variation of partial discharge quantity can be investigated the defective that cable insulation possibly exist.Therefore; Cable detection technology based on Partial Discharge Detection is to carry out the best approach that power cable fault detects and the cable insulation status is assessed, and as the important means of in time finding cable fault hidden danger, prediction cable operation life, guarantee cable security reliability service.At present, use wave of oscillation cable local discharge detection more widely and location technology in the world, the position and the detection itself that can effectively detect and locate cable local discharge do not damage cable.
The wave of oscillation partial discharge test system of present domestic use all is to use unit software to carry out data processing, and does not have its communication ability.Because the one-of-a-kind system data-handling capacity is limited, can only carries out simple office to cable and put analysis and location, when the data message amount that collects is big; Systematic analysis software processes speed is slower; Analysis result is comparatively single, can't carry out putting type identification such as office, and application such as development trend are put in office.When unit office puts analysis software and will carry out the cable insulation state estimation, need the operator to have considerable experience, and the state of insulation that provides assessment is relatively more subjective.One-of-a-kind system is played a game and is put data and analyze in test and accomplish laggard row in addition, can't be in test process enforcement office put and analyze and the location.The unit software release upgrade is inconvenient in addition, and data storage loss of data may take place in one-of-a-kind system and is unfavorable for concentrating preservation.
Based on above defective, the present invention proposes cable wave of oscillation measurement of partial discharge and the positioning system based on cloud computing, is used for local discharge signal collection, on-site real-time data analysis processing.Shelf depreciation data with each unit collects are incorporated into a unified high in the clouds system platform through the definition uniform data format and are used, and this is the advantage that one-of-a-kind system can't provide.For the mass data that one-of-a-kind system collects, cloud computing platform is brought into play the data-handling capacity of total system better through ultra-large and high fault-tolerant ability, thereby realizes that the office carry out cable fast, in real time puts identification, localization of fault.And cloud computing platform can integrated expert system, and the insulation status of cable is carried out more scientific and effective assessment objectively.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of existing measurement of partial discharge and positioning system; A kind of system that is used to measure the power cable shelf depreciation is provided; Can be so that local discharge signal can be by intactly measurement; A kind of data handling system based on cloud computing also is provided simultaneously, realizes the intelligence of mass data in the Partial Discharge Detection, calculation process fast.This system can not only measure cable and whether shelf depreciation take place and carry out office to put source location, and can play a game and put type and discern, and the insulation status of cable is carried out total evaluation, also can put trend to the office of cable, and cable operation life is predicted.
For achieving the above object, the technical scheme that the present invention adopts is: a kind of cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing comprise cloud computing platform and cloud computing AM access module.Said cloud computing AM access module is used to gather the information of cable local discharge, and information of obtaining and said cloud computing platform are carried out alternately; Said cloud computing platform uses local discharge signal analysis and positioning system to carry out operational analysis according to the data of uploading; Extract the characteristic parameter of out discharge signal; With the pattern-recognition of making the shelf depreciation type after the comparison of partial discharges fault feature database; Provide whether have shelf depreciation to take place and office high-volume size, the results such as position of shelf depreciation take place, and select whether to carry out cable insulation situation total evaluation, and application such as trend prediction are put in office according to the user.
Said cloud computing platform comprises local discharge signal analysis and positioning system, partial discharges fault feature database, PD Pattern Recognition system and cable insulation status assessing system; Cloud computing AM access module is the wave of oscillation partial discharge detecting system that band cloud calculates access function, comprises wave of oscillation generating means, signal acquiring system.Be used for shelf depreciation express-analysis and location, identification shelf depreciation type, and carry out the cable insulation state estimation.
Said cloud computing AM access module comprises signal acquiring system, wave of oscillation generating means, test product cable and shelf depreciation prover; Said wave of oscillation generating means is made up of the program control high-voltage DC power supply of 30KV, high-pressure electronic switch, air core inductor; Said signal acquiring system is made up of high pressure bleeder mechanism, coupling device, industrial computer, signal pickup assembly.Said wave of oscillation generating means is used to produce damp oscillatory wave, and said data acquisition system (DAS) is gathered the wave of oscillation signal that contains shelf depreciation information of outside input, and in signal acquisition stage signal is carried out pre-service.
Said cloud computing AM access module also comprises wireless network, is used to insert cloud computing platform and carries out data communication, and said data communication comprises reception, browses judgement, state estimation result after said cloud computing platform is handled local discharge signal.Said wireless network comprises WIFI or 3G network.
Said high-pressure electronic switch realizes that through the thyristor serial connection technology voltage of 28KV tolerates grade, has all pressures measure of optimization; Said high-pressure electronic switch is open-minded fast through the order that industrial computer sends, and the time is less than 1 μ S; Said high-pressure electronic switch adopts the Optical Fiber Transmission control signal, realizes separating of high pressure and low pressure with the photoelectricity isolation method, guarantees the safety of detection system low pressure layer circuit.
Said air core inductor and test product cable are formed the LC resonant circuit, and the program control high-voltage DC power supply of 30KV is after charging is accomplished to cable, by the industrial computer control high-pressure electronic switch closure of data acquisition system (DAS), are discharged over the ground in the LC loop and produce the wave of oscillation.The value of air core inductor is according to the wave of oscillation frequency of wave of oscillation design and the scope of cable under test, and preferred value is 0.75H.
The program control high-voltage DC power supply of described 30KV can produce the DC voltage of 0～30KV/12mA, directly adopts mains-supplied, is connected communication with industrial computer with simulating signal, carries out program control control.
Said signal pickup assembly; The partial discharge pulse's simulating signal that is used for measuring is carried out digitizing and storage; The input signal of its collection is the simulating signal of the one or more discharge pulses of shelf depreciation that will measure, and can the analog waveform (complete waveform) of described discharge pulse be converted to digital form and represent and store.Said digitized signal Processing comprises that the processing digital signal of extracting partial discharge pulse's waveform relevant feature parameters value, will comprising said parameter value data uploads to cloud computing platform.The digitizer that uses has the high-speed sampling ability of 100MS/s, the limiting bandwidth of 20MHz, the buffer memory ability of 16MB.A plurality of acquisition channels are arranged handling corresponding signal concurrently, and able to programmely be worth digital signal processing application such as adjustings, filtering, can use programmable algorithms to suppress noise.
Said coupling device is can be with the equipment of discharge signal from being extracted the acquired signal; It is a passive two-port network; Can convert the shelf depreciation current signal that collects to voltage signal; Frequency band meets the requirement of IEC60270, samples to be fit to signal pickup assembly, but filtering power-frequency voltage and low-frequency harmonics thereof.。
Said office puts prover and is used to produce the signal characteristic parameter along the calibration pulse signal that meets the IEC60270 standard-required, carries out Long-distance Control through communication interface and computing machine communication, correspondingly produces the calibration pulse signal according to range and the frequency selected.
Said high pressure bleeder mechanism has adopted the capacitance-resistance voltage divider principle, and circuit voltage is reduced to the safe voltage scope, filtering power frequency component and low-order harmonic thereof, and the wave of oscillation of low frequency and the local discharge signal of high frequency carried out Signal Separation.
Relatively prior art the present invention has following advantage and beneficial effect: this device can use the unit analysis software to carry out simple office to put positioning analysis; Also can use high in the clouds to carry out express-analysis processing office and put data; Can realize the generation of damp oscillatory wave, gather wave of oscillation office discharge signal and preserve automatically, but the test figure real-time Transmission carries out express-analysis, pattern-recognition and state estimation for the local discharge signal analysis and the positioning system in high in the clouds.Adopt wireless network to carry out data transmission; The shelf depreciation operation of data is handled, is analyzed and undertaken by the high in the clouds computing platform; Can overcome the not enough shortcoming of one-of-a-kind system data-handling capacity thus, the use cloud detection method of optic can carry out the analyzing and processing of various complicacies, expanding system function to data.
Description of drawings
Fig. 1 is based on the cable wave of oscillation measurement of partial discharge of cloud computing and the structured flowchart of positioning system.
Fig. 2 is the structured flowchart of cloud computing AM access module.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done further explain, but enforcement of the present invention is not limited thereto.
As shown in Figure 1; It is one-piece construction block diagram of the present invention; This system comprises cloud computing platform and cloud computing AM access module, and cloud computing platform comprises local discharge signal analysis and positioning system, partial discharges fault feature database, PD Pattern Recognition system and cable insulation status assessing system.Cloud computing AM access module is the wave of oscillation cable local discharge detection system that the band cloud termination is gone into function, and a plurality of AM access modules can insert cloud computing platform simultaneously and obtain calculation services, and carries out data sharing.When carrying out Partial Discharge Detection; The generation and the data acquisition of the wave of oscillation carried out in cloud computing AM access module; Give cloud computing platform data that collect and measured value through wireless network transmissions then; Cloud computing platform is with data storage and carry out a series of processing, obtain shelf depreciation court verdict and insulation status assessment result after analyzing computing, and the high in the clouds platform sends operation result to corresponding cloud computing AM access module.
Like Fig. 2 is the structured flowchart of cloud computing AM access module, and cloud computing AM access module comprises test product cable, signal acquiring system, wave of oscillation generating means, shelf depreciation prover.Said wave of oscillation generating means is made up of the program control high-voltage DC power supply of 30KV, high-pressure electronic switch, air core inductor.Said signal acquiring system is made up of high pressure bleeder mechanism, coupling device, industrial computer, signal pickup assembly.Circuit is connected to during system works: air core inductor and test product cable connect to form lc circuit; The program control high-voltage DC power supply of 30KV is connected with the air core inductor of lc circuit; In the experimental stage high-voltage power supply test product cable of lc circuit is charged to the predeterminated voltage value; The high-pressure electronic switch is connected with the air core inductor of lc circuit, and the controlled closure of high-pressure electronic switch makes lc circuit discharge generation damp oscillatory wave over the ground.The high pressure bleeder mechanism obtains wave of oscillation signal from the connection of lc circuit mid point; And be connected with coupling device; Coupling device is connected with signal pickup assembly, and signal pickup assembly is installed in the industrial computer, and industrial computer is connected with high in the clouds through WIFI or 3G network and carries out data transmission; The shelf depreciation prover calibration phase be connected on test product cable and cable shield () between, need break off being electrically connected of prover during test.
Can realize through following proposal based on the cable wave of oscillation measurement of partial discharge of cloud computing and positioning system, test macro at first to connecting, use office puts prover test macro is calibrated, and preserves the measurement of correlation parameter.After system calibration is accomplished, cable under test is charged by the program control high-voltage DC power supply of 30KV, reach predeterminated voltage after, control high-pressure electronic switch closure makes circuit produce damped oscillation.The wave of oscillation that contains shelf depreciation information carries out the collection and the processing of signal by signal pickup assembly behind high pressure bleeder mechanism and coupling device, send the data to the cloud computing platform analysis then.After the local discharge signal analysis of cloud computing platform and positioning system draw the various features parameter of signal to data analysis, draw and have or not shelf depreciation to take place and office's analysis results such as position of size and shelf depreciation high-volume.And combine partial discharges fault feature database and local discharge mode recognition system, the insulation status of cable is made judgement.
The present invention can carry out the shelf depreciation test to power cable, in test process, needs signal is gathered and handled.The processing of data is generally carried out at cloud computing platform; Adopt cloud computing that reliable, safe data storage center is provided; The user needn't worry the shelf depreciation loss of data that collects; And a large amount of shelf depreciation operation of data handle lowly to the equipment requirements of cloud computing AM access module, use more conveniently, can realize sharing of insulation fault database.
Claims (10)
1. cable wave of oscillation measurement of partial discharge and positioning system based on a cloud computing is characterized in that comprising cloud computing platform and cloud computing AM access module; Said cloud computing AM access module is used to gather the information of cable local discharge, and information of obtaining and said cloud computing platform are carried out alternately; Said cloud computing platform is a specific cloud, is used to store and handle the shelf depreciation information that cloud computing AM access module is uploaded.
2. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 1 is characterized in that said cloud computing platform comprises local discharge signal analysis and positioning system, partial discharges fault feature database, PD Pattern Recognition system and cable insulation status assessing system.
3. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 1 is characterized in that said cloud computing AM access module comprises signal acquiring system, wave of oscillation generating means, test product cable and shelf depreciation prover; Said wave of oscillation generating means is made up of the program control high-voltage DC power supply of 30KV, high-pressure electronic switch, air core inductor; Said signal acquiring system is made up of high pressure bleeder mechanism, coupling device, industrial computer, signal pickup assembly.
4. according to claim 1 or 3 described cable wave of oscillation measurement of partial discharge and positioning systems based on cloud computing; It is characterized in that said cloud computing AM access module also comprises wireless network; Be used to insert cloud computing platform and carry out data communication, said data communication comprises reception, browses judgement, state estimation result after said cloud computing platform is handled local discharge signal; Said wireless network comprises WIFI or 3G network.
5. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 3 is characterized in that the voltage tolerance grade of said high-pressure electronic switch through thyristor serial connection technology realization 28KV; Said high-pressure electronic switch is open-minded fast through the order that industrial computer sends, and the time is less than 1 μ S; Said high-pressure electronic switch adopts the Optical Fiber Transmission control signal, realizes separating of high pressure and low pressure with the photoelectricity isolation method.
6. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 3; It is characterized in that said air core inductor and test product cable composition LC resonant circuit; The program control high-voltage DC power supply of 30KV charges to cable after the completion; By industrial computer control high-pressure electronic switch closure,, the LC loop produces the wave of oscillation thereby being discharged over the ground.
7. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 3 is characterized in that partial discharge pulse's simulating signal that said signal pickup assembly is used for measuring carries out digitizing and storage; Said digitized signal Processing comprises that the processing digital signal of extracting partial discharge pulse's waveform relevant feature parameters value, will comprising said parameter value data uploads to cloud computing platform.
8. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 8 is characterized in that said digitizer has the high-speed sampling ability of 100MS/s, the limiting bandwidth of 20MHz, the buffer memory ability of 16MB.
9. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 3; It is characterized in that said signal pickup assembly has a plurality of acquisition channels with the parallel processing signal, and can be worth adjusting, filtering and suppress noise through programming.
10. cable wave of oscillation measurement of partial discharge and positioning system based on cloud computing according to claim 3; It is characterized in that said coupling device is a two-port network; Be used for converting input current signal to voltage signal; From being extracted discharge signal, filtering power-frequency voltage and low-frequency harmonics thereof the acquired signal.
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| CN109613407B (en) * | 2019-01-08 | 2024-03-08 | 国网江苏省电力有限公司电力科学研究院 | Power cable partial discharge positioning system and detection method |
| CN109655726B (en) * | 2019-01-08 | 2024-03-08 | 国网江苏省电力有限公司电力科学研究院 | Power cable partial discharge positioning system and detection method based on solenoid high-voltage line |
| CN110261746A (en) * | 2019-07-08 | 2019-09-20 | 清华大学深圳研究生院 | Electric cable stoppage detection method based on oscillating wave voltage periodic attenuation characteristic |
| CN110261746B (en) * | 2019-07-08 | 2021-08-24 | 清华大学深圳研究生院 | Cable defect detection method based on periodic attenuation characteristics of oscillating wave voltage |
| CN113341277A (en) * | 2021-04-19 | 2021-09-03 | 云南电网有限责任公司临沧供电局 | Insulator fault assessment method based on multi-frequency ultrasonic waves and experimental platform thereof |
| CN113588452A (en) * | 2021-07-30 | 2021-11-02 | 国网青海省电力公司信息通信公司 | Cable life prediction method and device, processor and storage medium |
| CN113588452B (en) * | 2021-07-30 | 2023-10-27 | 国网青海省电力公司信息通信公司 | Cable life prediction method and device, processor and storage medium |
| CN114034990A (en) * | 2021-10-22 | 2022-02-11 | 中核核电运行管理有限公司 | High-voltage electrical equipment online diagnosis system and method |
| CN114089136A (en) * | 2021-12-01 | 2022-02-25 | 国网河南省电力公司南阳供电公司 | High-voltage cable partial discharge detection and defect diagnosis system based on artificial intelligence |
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