CN104569745A - Partial discharge live detection device and method - Google Patents
Partial discharge live detection device and method Download PDFInfo
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Abstract
The invention discloses a partial discharge live detection device and method. The partial discharge live detection device comprises a high frequency sensor, an ultrahigh frequency sensor and an ultrasonic sensor which are used for detecting partial discharge signals of power equipment. The partial discharge live detection device further comprises an oscilloscope, and the oscilloscope is connected with the high frequency sensor, the ultrahigh frequency sensor and the ultrasonic sensor respectively and used for processing the partial discharge signals to obtain and display the phase distribution maps of the partial discharge signals. The partial discharge live detection device solves the problem that the partial discharge live detection device is limited to the power equipment in the prior art, and then the effect of improving the applicability of the partial discharge live detection device is achieved.
Description
Technical field
The present invention relates to field of electrical equipment, in particular to a kind of live testing apparatus for local discharge and method.
Background technology
It is the effective means that discovering device latency runs hidden danger that charged electric power apparatus detects, it is the important leverage of power equipment safety, stable operation, at present, available live testing apparatus for local discharge mainly comprises supersonic detection device, superfrequency pick-up unit and high-frequency detection device, is corresponding in turn to and adopts ultrasonic method, superfrequency method and high-frequency method to carry out Partial Discharge Detection.
Above-mentioned several pick-up unit can adopt the mode of non-intrusion type to detect equipment, but for dissimilar power equipment, validity and the scope of application of several pick-up unit exist difference, have respective advantage and limitation.In actual concrete operations, merely adopt the way of above-mentioned several pick-up unit also to there is many problems: 1) with high costs, economy has problems, and assorts this three kinds of pick-up units simultaneously, by the current market price, needs about 3,000,000 simultaneously; 2) carry inconvenience, execute-in-place is complicated, considerably increases the working strength of testing staff; 3) require very high to the professional standards of testing staff, the use of three kinds of checkout equipments all needs height technical professional.
Be limited to the problem of power equipment for live testing apparatus for local discharge in correlation technique, not yet propose effective solution at present.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of live testing apparatus for local discharge and method, to solve the problem that live testing apparatus for local discharge in prior art is limited to power equipment.
To achieve these goals, according to an aspect of the present invention, provide a kind of live testing apparatus for local discharge, comprising: high frequency sensors, superfrequency sensor and ultrasonic sensor, all for detecting the local discharge signal of power equipment; And oscillograph, be all connected with ultrasonic sensor with high frequency sensors, superfrequency sensor, for the treatment of local discharge signal, obtain and show the phase resolved plot of local discharge signal.
Further, oscillograph comprises: the first acquisition channel, is connected with high frequency sensors, for receiving the high-frequency signal of the expression local discharge signal from high frequency sensors; Second acquisition channel, is connected with superfrequency sensor, for receiving the ultrahigh-frequency signal of the expression local discharge signal from superfrequency sensor; 3rd acquisition channel, is connected with ultrasonic sensor, for receiving the ultrasonic signal of the expression local discharge signal from ultrasonic sensor; Controlling of sampling unit, is all connected with the 3rd acquisition channel with the first acquisition channel, the second acquisition channel, for controlling the sampling pattern of the first acquisition channel, the second acquisition channel and the 3rd acquisition channel; Processing unit, all be connected with the 3rd acquisition channel with the first acquisition channel, the second acquisition channel, for receiving high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, respectively from the extraction characteristic parameter high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, and search the phase resolved plot mated with characteristic parameter in presetting database, obtain the phase resolved plot of local discharge signal; And display unit, be all connected with processing unit with the first acquisition channel, the second acquisition channel, the 3rd acquisition channel, for showing the phase resolved plot of high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and local discharge signal.
Further, processing unit comprises: receiver module, is all connected, for receiving high-frequency signal, ultrahigh-frequency signal and ultrasonic signal with the first acquisition channel, the second acquisition channel with the 3rd acquisition channel; Noise reduction module, is connected with receiver module, for carrying out anti-interference process respectively to high-frequency signal, ultrahigh-frequency signal and ultrasonic signal; Extraction module, is connected with noise reduction module, for extracting the characteristic parameter in the high-frequency signal after anti-interference process, ultrahigh-frequency signal and ultrasonic signal respectively; And search module, being connected with extraction module, for searching the phase resolved plot mated with characteristic parameter in presetting database, obtaining the phase resolved plot of local discharge signal.
Further, oscillograph also comprises: storage unit, is connected with processing unit, for the phase resolved plot of local discharge signal storing high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and find.
Further, live testing apparatus for local discharge also comprises: high frequency filter; Ultrahigh frequency filter; High-frequency preamplifier, is connected with high frequency sensors, and is connected to oscillograph by high frequency filter;
UHF preamplifier stage, is connected with superfrequency sensor, and is connected to oscillograph by ultrahigh frequency filter;
Ultrasound wave prime amplifier, is connected between ultrasonic sensor and oscillograph; And conditioning and power supply unit, there is the supply module being connected to high-frequency adapter mouth between high-frequency preamplifier and high frequency filter, being connected to superfrequency converting interface between UHF preamplifier stage and ultrahigh frequency filter, being connected to the ultrasound wave converting interface between ultrasound wave prime amplifier and oscillograph and being all connected with ultrasound wave converting interface with high-frequency adapter mouth, superfrequency converting interface.
Further, high-frequency adapter mouth is connected with high-frequency preamplifier by the first coaxial wire, superfrequency converting interface is connected with UHF preamplifier stage by the second coaxial wire, and ultrasound wave converting interface is connected with ultrasound wave prime amplifier by triaxial cable line.
Further, high frequency sensors is arranged on the ground wire of power equipment, and superfrequency sensor setting is on the predeterminated position taking power equipment as reference point, and ultrasonic sensor is arranged in the metal outer wall of power equipment.
To achieve these goals, according to a further aspect in the invention, provide a kind of shelf depreciation live detection method, comprising: the local discharge signal receiving the power equipment detected from high frequency sensors, superfrequency sensor and ultrasonic sensor; And process local discharge signal, obtain and show the phase resolved plot of local discharge signal.
Further, the local discharge signal receiving the power equipment detected from high frequency sensors, superfrequency sensor and ultrasonic sensor comprises: the high-frequency signal receiving the expression local discharge signal from high frequency sensors; Receive the ultrahigh-frequency signal from the expression local discharge signal of superfrequency sensor; And the ultrasonic signal received from the expression local discharge signal of ultrasonic sensor, process local discharge signal, obtains and the phase resolved plot showing local discharge signal comprises: respectively from the extraction characteristic parameter high-frequency signal, ultrahigh-frequency signal and ultrasonic signal; Search the phase resolved plot mated with characteristic parameter in presetting database, obtain the phase resolved plot of local discharge signal; And the phase resolved plot of display high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and local discharge signal.
Further, before extracting the characteristic parameter in high-frequency signal, ultrahigh-frequency signal and ultrasonic signal respectively, shelf depreciation live detection method also comprises: carry out anti-interference process respectively to high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, wherein, the characteristic parameter extracted respectively in high-frequency signal, ultrahigh-frequency signal and ultrasonic signal comprises: extract the characteristic parameter in the high-frequency signal after anti-interference process, ultrahigh-frequency signal and ultrasonic signal respectively.
Further, shelf depreciation live detection method also comprises: the phase resolved plot of local discharge signal storing high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and find.
The present invention adopts the live testing apparatus for local discharge of following structure: high frequency sensors, superfrequency sensor and ultrasonic sensor, all for detecting the local discharge signal of power equipment; And oscillograph, be all connected with ultrasonic sensor with high frequency sensors, superfrequency sensor, for the treatment of local discharge signal, obtain and show the phase resolved plot of local discharge signal.By arranging video sensor, superfrequency sensor and ultrasonic sensor in live testing apparatus for local discharge, and utilize oscillograph process local discharge signal, obtain and show the phase resolved plot of local discharge signal, achieve and can carry out local discharge signal detection to dissimilar power equipment, solve the problem that live testing apparatus for local discharge in prior art is limited to power equipment, and then reach the effect of the usability improving live testing apparatus for local discharge.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the live testing apparatus for local discharge according to the embodiment of the present invention;
Fig. 2 is the concrete schematic diagram of the live testing apparatus for local discharge according to the embodiment of the present invention;
Fig. 3 is the location device schematic diagram of sensor on power equipment in the live testing apparatus for local discharge according to the embodiment of the present invention; And
Fig. 4 is the process flow diagram of the shelf depreciation live detection method according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiments provide a kind of live testing apparatus for local discharge, below the live testing apparatus for local discharge that the embodiment of the present invention provides be specifically introduced:
Fig. 1 is the schematic diagram of the live testing apparatus for local discharge according to the embodiment of the present invention, and as shown in Figure 1, the live testing apparatus for local discharge of this embodiment mainly comprises high frequency sensors, superfrequency sensor, ultrasonic sensor and oscillograph, wherein:
High frequency sensors, superfrequency sensor and ultrasonic sensor, all for detecting the local discharge signal of power equipment.
Oscillograph is all connected with ultrasonic sensor with high frequency sensors, superfrequency sensor, for the treatment of local discharge signal, obtains and shows the phase resolved plot of local discharge signal.In embodiments of the present invention, oscillograph is high-speed figure memory-scope.
The live testing apparatus for local discharge of the embodiment of the present invention, by arranging high frequency sensors, superfrequency sensor and ultrasonic sensor in live testing apparatus for local discharge, and utilize oscillograph process local discharge signal, obtain and show the phase resolved plot of local discharge signal, achieve and can carry out local discharge signal detection to dissimilar power equipment, solve the problem that live testing apparatus for local discharge in prior art is limited to power equipment, and then reach the effect of the usability improving live testing apparatus for local discharge.
Particularly, above-mentioned oscillograph mainly comprises three acquisition channels, controlling of sampling unit and processing unit:
Each acquisition channel is connected respectively a sensor, wherein, first acquisition channel is connected with high frequency sensors, for receiving the high-frequency signal of the expression local discharge signal from high frequency sensors, second acquisition channel is connected with superfrequency sensor, for receiving the ultrahigh-frequency signal of the expression local discharge signal from superfrequency sensor, the 3rd acquisition channel is connected with ultrasonic sensor, for receiving the ultrasonic signal of the expression local discharge signal from ultrasonic sensor.
Controlling of sampling unit is all connected with the 3rd acquisition channel with the first acquisition channel, the second acquisition channel, for controlling the sampling pattern of the first acquisition channel, the second acquisition channel and the 3rd acquisition channel, wherein, controlling of sampling unit can switch sampling pattern according to the operational order of user.In embodiments of the present invention, mainly be divided into real-time sampling pattern and continuous sampling pattern, real-time sampling pattern refers to according to specifying the data-signal transmitted in sampling number Real-time Collection passage, and the data collected are transferred to processing unit process, reach after specifying sampling number and stop sampling.Continuous sampling pattern refers to the data-signal of the interior transmission of the Real-time Collection passage not limiting number of times, and the data collected directly is transferred to display unit display.
Processing unit is all connected with the 3rd acquisition channel with the first acquisition channel, the second acquisition channel equally, for receiving high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, respectively from the extraction characteristic parameter high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, and search the phase resolved plot mated with characteristic parameter in presetting database, obtain the phase resolved plot of local discharge signal.
Display unit is used for the phase resolved plot of local discharge signal that display processing unit process obtains, and from the high-frequency signal of acquisition channel, ultrahigh-frequency signal and ultrasonic signal.
More specifically, processing unit mainly comprises receiver module, noise reduction module, extraction module and searches module, wherein:
Receiver module is all connected with the 3rd acquisition channel with the first acquisition channel, the second acquisition channel, for receiving high-frequency signal, ultrahigh-frequency signal and ultrasonic signal.
Noise reduction module is connected with receiver module, for carrying out anti-interference process respectively to high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, in the Site Detection of the local discharge signal of power equipment, the interference affecting shelf depreciation roughly can be divided into arrowband interference, white noise interference and impulse type interference.For the interference of this three types, noise reduction module mainly adopts the Suppression of narrow band interference algorithm based on FFT, the denoising algorithm based on small echo and the filtering algorithm based on neural network (NN) to carry out anti-interference process to corresponding signal respectively.Carry out anti-interference process to the received signal by noise reduction module, avoid interference the impact of signal on actual detection signal, improve the degree of accuracy that local discharge signal is detected.
Extraction module is connected with noise reduction module, for extracting the characteristic parameter in the high-frequency signal after anti-interference process, ultrahigh-frequency signal and ultrasonic signal respectively, the essential characteristic parameter of shelf depreciation mainly contains maximum pd quantity MaxQ, mean discharge magnitude AvgQ, average discharge current I, all square rate DNQ etc. more than 10 plant.
Searching module to be connected with extraction module, for searching the phase resolved plot mated with characteristic parameter in presetting database, obtaining the phase resolved plot of local discharge signal.Wherein, store the phase resolved plot corresponding with different characteristic parameter in presetting database, these phase resolved plots prestored can room simulation test be set up by experiment.Power equipment has partial discharge phenomenon to deposit in case, and the characteristic parameter in the discharge signal corresponding to shelf depreciation type difference is also different, and characteristic parameter can embody in the phase resolved plot of local discharge signal.Dissimilar local discharge signal, its phase resolved plot is different, therefore, by searching the phase resolved plot mated with characteristic parameter, and show the collection of illustrative plates found, the accurate index characterizing power equipment discharge type can be provided, to facilitate personnel to the analysis of testing and diagnosing result to tester.In embodiments of the present invention, the phase resolved plot of local discharge signal mainly contains maximum pd quantity PHASE DISTRIBUTION H
qmax(φ), mean discharge magnitude PHASE DISTRIBUTION H
qn(φ), discharge time PHASE DISTRIBUTION H
n(φ), shelf depreciation amplitude distribution H
f(p) and local discharge energy distribution H (p) totally five kinds of Two-Dimensional Discharge spectrograms, and a kind of three-dimensional discharge spectrum H
n(φ, q).
Further, oscillograph can also comprise storage unit, and this storage unit is connected with processing unit, for the phase resolved plot of local discharge signal storing high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and find.
By high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and the phase resolved plot of local discharge signal that finds being stored, be convenient to later analysis and the generation of test report.Achieve the effective management to Site Detection information, for the labor of sampled data provides help.
Further, as shown in Figure 2, the live testing apparatus for local discharge of the embodiment of the present invention also comprises high frequency filter, ultrahigh frequency filter, high-frequency preamplifier, UHF preamplifier stage, ultrasound wave prime amplifier and conditioning and power supply unit, wherein:
High-frequency preamplifier is connected with high frequency sensors, and is connected to oscillograph by high frequency filter, and high-frequency preamplifier working band is 500kHz ~ 40MHz, and gain is 40dB.
UHF preamplifier stage is connected with superfrequency sensor, and is connected to oscillograph by ultrahigh frequency filter, and UHF preamplifier stage working band is 500MHz ~ 1.5GHz, and gain is 40dB.
Ultrasound wave prime amplifier is connected with ultrasonic sensor, and ultrasonic amplifier operation frequency band is 20kHz ~ 180kHz, and gain is 60dB.
The supply module that conditioning and power supply unit comprise high-frequency adapter mouth, ultrasonic converting interface, superfrequency converting interface are all connected with ultrasound wave converting interface with high-frequency adapter mouth, superfrequency converting interface.Wherein, high-frequency adapter mouth is connected between high-frequency preamplifier and high frequency filter, is delivered to high frequency filter for the signal exported by high-frequency preamplifier.Superfrequency converting interface is connected between UHF preamplifier stage and ultrahigh frequency filter, is delivered to ultrahigh frequency filter for the signal exported by UHF preamplifier stage.Ultrasound wave converting interface is connected between ultrasound wave prime amplifier and oscillograph, is delivered to oscillograph for the signal exported by ultrasound wave prime amplifier.Supply module is then for powering to high-frequency preamplifier, UHF preamplifier stage and ultrasound wave prime amplifier.
Further, high-frequency adapter mouth is connected with high-frequency preamplifier by the first coaxial wire, superfrequency converting interface is connected with UHF preamplifier stage by the second coaxial wire, and ultrasound wave converting interface is connected with ultrasound wave prime amplifier by triaxial cable line.
By the connecting circuit between each converting interface and each prime amplifier being set to the form of concentric cable, achieve the signal that supply module and each prime amplifier export and share a signal line, transmit to the back-end after the signal that each prime amplifier exports is separated from the conversion mouth of correspondence.
High-frequency adapter mouth is that high-frequency signal directly exports via conditioning and power supply unit, and ultrasonic converting interface is that ultrasonic signal directly exports via conditioning and power supply unit, and superfrequency converting interface is that ultrahigh-frequency signal directly exports via conditioning and power supply unit.Conditioning and power supply unit are also powered for each prime amplifier above-mentioned.
The concrete setting position of each sensor relative power device A above-mentioned is diagrammatically illustrated in Fig. 3, as shown in Figure 3:
Be applied in Site Detection, high frequency sensors is arranged on the ground wire of power equipment, high-frequency current signal during power equipment generation shelf depreciation can be obtained, originally putting in inventive embodiments, high frequency sensors adopts Rogowski coil, for external clamp type structure, transport function 5.0 Ω, measurement bandwidth is 500kHz ~ 40MHz.
Superfrequency sensor is arranged near power equipment, specifically be arranged on power equipment be reference point predeterminated position on, electromagnetic wave signal during power equipment internal leakage shelf depreciation out can be detected, originally putting in inventive embodiments, superfrequency sensor adopts external microstrip antenna structure, measurement bandwidth is 500MHz ~ 1.5GHz, is applied in Site Detection.
Sonac is pasted onto in the metal outer wall of power equipment ground connection, the ultrasonic signal that power equipment inside produces when there is shelf depreciation can be detected, originally putting in inventive embodiments, sonac adopts the calibrate AE sensor of piezoelectric ceramic type, detection bandwidth is 20kHz ~ 180kHz, is applied in Site Detection.
Based on the live testing apparatus for local discharge of the embodiment of the present invention shown in Fig. 2, illustrate the principle of work of the live testing apparatus for local discharge of the embodiment of the present invention:
When shelf depreciation occurs in power equipment inside, have high-frequency pulse current and propagate to earth terminal from discharge source along the metal outer wall of equipment, outwards inspire superfrequency electromagnetic wave and ultrasonic signal from discharge source simultaneously.When there is shelf depreciation in tested power equipment inside, three kinds of signals that electric discharge produces can be installed in the high frequency sensors on power equipment ground wire, be placed in the superfrequency sensor of the position being easy to leakage electromagnetic wave near power equipment, the sonac be pasted onto in the metal outer wall of power equipment detects, after prime amplifier pre-service, be sent to conditioning and power supply unit, local discharge signal is transferred to oscillograph analytic system again and samples, analyzes, diagnoses after corresponding comprehensively regulating.By oscillograph analytic system, the sampling of discharge signal, data characteristics Parameter analysis, data are stored, data display, the content such as inquiry and data diagnosis, provide the testing result of power equipment.
The embodiment of the present invention additionally provides a kind of shelf depreciation live detection method, any one live testing apparatus for local discharge that this shelf depreciation live detection method provides mainly through embodiment of the present invention foregoing performs, and is specifically introduced below to the shelf depreciation live detection method that the embodiment of the present invention provides:
Fig. 4 is the process flow diagram of the shelf depreciation live detection method according to the embodiment of the present invention, and as shown in Figure 4, the shelf depreciation live detection method of this embodiment mainly comprises the steps S402 and S404:
S402: the local discharge signal receiving the power equipment detected from high frequency sensors, superfrequency sensor and ultrasonic sensor.
S404: process local discharge signal, obtains and shows the phase resolved plot of local discharge signal.
The shelf depreciation live detection method of the embodiment of the present invention, detect by utilizing high frequency sensors, superfrequency sensor and the local discharge signal of ultrasonic sensor to power equipment, and the local discharge signal that three detects is processed, obtain and show the phase resolved plot of local discharge signal, achieve and can carry out local discharge signal detection to dissimilar power equipment, solve in prior art and carry out the problem that Partial Discharge Detection is limited to power equipment, and then reach the effect improving Partial Discharge Detection usability.
Particularly, the local discharge signal receiving the power equipment detected from high frequency sensors, superfrequency sensor and ultrasonic sensor comprises: the high-frequency signal receiving the expression local discharge signal from high frequency sensors; Receive the ultrahigh-frequency signal from the expression local discharge signal of superfrequency sensor; And the ultrasonic signal received from the expression local discharge signal of ultrasonic sensor.
Process local discharge signal, obtains and the phase resolved plot showing local discharge signal comprises:
Respectively from the extraction characteristic parameter high-frequency signal, ultrahigh-frequency signal and ultrasonic signal; Search the phase resolved plot mated with characteristic parameter in presetting database, obtain the phase resolved plot of local discharge signal; And the phase resolved plot of display high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and local discharge signal.
Preferably, before extracting the characteristic parameter in high-frequency signal, ultrahigh-frequency signal and ultrasonic signal respectively, the shelf depreciation live detection method of the embodiment of the present invention also comprises: carry out anti-interference process respectively to high-frequency signal, ultrahigh-frequency signal and ultrasonic signal, wherein, characteristic parameter in high-frequency signal, ultrahigh-frequency signal and ultrasonic signal is extracted respectively then: extract the characteristic parameter in the high-frequency signal after anti-interference process, ultrahigh-frequency signal and ultrasonic signal respectively.
Carry out anti-interference process to the received signal by noise reduction module, avoid interference the impact of signal on actual detection signal, improve the degree of accuracy that local discharge signal is detected.
Further, the shelf depreciation live detection method of the embodiment of the present invention also comprises: the phase resolved plot of local discharge signal storing high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and find.
By high-frequency signal, ultrahigh-frequency signal, ultrasonic signal and the phase resolved plot of local discharge signal that finds being stored, be convenient to later analysis and the generation of test report.Achieve the effective management to Site Detection information, for the labor of sampled data provides help.
As can be seen from the above description, present invention achieves and can carry out local discharge signal detection to dissimilar power equipment, and be not limited to the particular type of power equipment, reach the effect improving shelf depreciation live detection usability.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a live testing apparatus for local discharge, is characterized in that, comprising:
High frequency sensors, superfrequency sensor and ultrasonic sensor, all for detecting the local discharge signal of power equipment; And
Oscillograph, is all connected with described ultrasonic sensor with described high frequency sensors, described superfrequency sensor, for the treatment of described local discharge signal, obtains and shows the phase resolved plot of described local discharge signal.
2. live testing apparatus for local discharge according to claim 1, is characterized in that, described oscillograph comprises:
First acquisition channel, is connected with described high frequency sensors, for receiving the high-frequency signal of the described local discharge signal of expression from described high frequency sensors;
Second acquisition channel, is connected with described superfrequency sensor, for receiving the ultrahigh-frequency signal of the described local discharge signal of expression from described superfrequency sensor;
3rd acquisition channel, is connected with described ultrasonic sensor, for receiving the ultrasonic signal of the described local discharge signal of expression from described ultrasonic sensor;
Controlling of sampling unit, is all connected with described 3rd acquisition channel with described first acquisition channel, described second acquisition channel, for controlling the sampling pattern of described first acquisition channel, described second acquisition channel and described 3rd acquisition channel;
Processing unit, all be connected with described 3rd acquisition channel with described first acquisition channel, described second acquisition channel, for receiving described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal, respectively from the extraction characteristic parameter described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal, and search the phase resolved plot mated with described characteristic parameter in presetting database, obtain the phase resolved plot of described local discharge signal; And
Display unit, all be connected with described processing unit with described first acquisition channel, described second acquisition channel, described 3rd acquisition channel, for showing the phase resolved plot of described high-frequency signal, described ultrahigh-frequency signal, described ultrasonic signal and described local discharge signal.
3. live testing apparatus for local discharge according to claim 2, is characterized in that, described processing unit comprises:
Receiver module, is all connected with described 3rd acquisition channel with described first acquisition channel, described second acquisition channel, for receiving described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal;
Noise reduction module, is connected with described receiver module, for carrying out anti-interference process respectively to described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal;
Extraction module, is connected with described noise reduction module, for extracting the described characteristic parameter in the described high-frequency signal after anti-interference process, described ultrahigh-frequency signal and described ultrasonic signal respectively; And
Searching module, be connected with described extraction module, for searching the phase resolved plot mated with described characteristic parameter in described presetting database, obtaining the phase resolved plot of described local discharge signal.
4. live testing apparatus for local discharge according to claim 2, is characterized in that, described oscillograph also comprises:
Storage unit, is connected with described processing unit, for the phase resolved plot of described local discharge signal storing described high-frequency signal, described ultrahigh-frequency signal, described ultrasonic signal and find.
5. live testing apparatus for local discharge according to claim 1, is characterized in that, described live testing apparatus for local discharge also comprises:
High frequency filter;
Ultrahigh frequency filter;
High-frequency preamplifier, is connected with described high frequency sensors, and is connected to described oscillograph by described high frequency filter;
UHF preamplifier stage, is connected with described superfrequency sensor, and is connected to described oscillograph by described ultrahigh frequency filter;
Ultrasound wave prime amplifier, is connected between described ultrasonic sensor and described oscillograph; And
Conditioning and power supply unit, have the supply module being connected to high-frequency adapter mouth between described high-frequency preamplifier and described high frequency filter, being connected to superfrequency converting interface between described UHF preamplifier stage and described ultrahigh frequency filter, being connected to the ultrasound wave converting interface between described ultrasound wave prime amplifier and described oscillograph and being all connected with described ultrasound wave converting interface with described high-frequency adapter mouth, described superfrequency converting interface.
6. live testing apparatus for local discharge according to claim 1, is characterized in that,
Described high-frequency adapter mouth is connected with described high-frequency preamplifier by the first coaxial wire,
Described superfrequency converting interface is connected with described UHF preamplifier stage by the second coaxial wire,
Described ultrasound wave converting interface is connected with described ultrasound wave prime amplifier by triaxial cable line.
7. live testing apparatus for local discharge according to claim 1, is characterized in that,
Described high frequency sensors is arranged on the ground wire of described power equipment,
Described superfrequency sensor setting on the predeterminated position being reference point with described power equipment,
Described ultrasonic sensor is arranged in the metal outer wall of described power equipment.
8. a shelf depreciation live detection method, is characterized in that, comprising:
Receive the local discharge signal of the power equipment detected from high frequency sensors, superfrequency sensor and ultrasonic sensor; And
Process described local discharge signal, obtain and show the phase resolved plot of described local discharge signal.
9. shelf depreciation live detection method according to claim 8, is characterized in that,
The local discharge signal receiving the power equipment detected from high frequency sensors, superfrequency sensor and ultrasonic sensor comprises:
Receive the high-frequency signal from the described local discharge signal of expression of described high frequency sensors;
Receive the ultrahigh-frequency signal from the described local discharge signal of expression of described superfrequency sensor; And
Receive the ultrasonic signal from the described local discharge signal of expression of described ultrasonic sensor,
Process described local discharge signal, to obtain and the phase resolved plot showing described local discharge signal comprises:
Respectively from the extraction characteristic parameter described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal;
Search the phase resolved plot mated with described characteristic parameter in presetting database, obtain the phase resolved plot of described local discharge signal; And
Show the phase resolved plot of described high-frequency signal, described ultrahigh-frequency signal, described ultrasonic signal and described local discharge signal.
10. shelf depreciation live detection method according to claim 9, is characterized in that, before extracting the characteristic parameter in described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal respectively, described shelf depreciation live detection method also comprises:
Respectively anti-interference process is carried out to described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal,
Wherein, the characteristic parameter extracted respectively in described high-frequency signal, described ultrahigh-frequency signal and described ultrasonic signal comprises: extract the described characteristic parameter in the described high-frequency signal after anti-interference process, described ultrahigh-frequency signal and described ultrasonic signal respectively.
11. shelf depreciation live detection methods according to claim 9, is characterized in that, described shelf depreciation live detection method also comprises:
The phase resolved plot of described local discharge signal storing described high-frequency signal, described ultrahigh-frequency signal, described ultrasonic signal and find.
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| CN105548846A (en) * | 2016-02-01 | 2016-05-04 | 广州智丰电气科技有限公司 | Signal frequency conversion preposition module of portable intelligent four-channel partial discharge detector |
| CN105929310A (en) * | 2016-04-27 | 2016-09-07 | 支磊 | Device for detecting GIS partial discharge fault and detection method thereof |
| CN106249054A (en) * | 2016-09-18 | 2016-12-21 | 广州供电局有限公司 | Capacitance type potential transformer and integration detection sensor thereof |
| CN108132427A (en) * | 2016-12-01 | 2018-06-08 | 成浩科电股份有限公司 | Partial discharge detection device and partial discharge detection method |
| CN108414900A (en) * | 2018-03-08 | 2018-08-17 | 云南电网有限责任公司电力科学研究院 | A kind of method and system of detection partial discharge of transformer |
| CN108459244A (en) * | 2018-01-31 | 2018-08-28 | 天津大学 | Based on UHF and the united power cable partial discharge detecting systems of HFCT |
| CN110412431A (en) * | 2019-08-05 | 2019-11-05 | 国网湖南省电力有限公司 | A kind of diagnostic method and diagnostic system of the shelf depreciation defect type of power equipment |
| CN111157864A (en) * | 2020-03-12 | 2020-05-15 | 广东电网有限责任公司 | Partial discharge ultrasonic signal and map recognition system and method |
| CN112014691A (en) * | 2020-07-10 | 2020-12-01 | 国网安徽省电力有限公司电力科学研究院 | Multi-information fusion partial discharge detection terminal and method under power internet of things |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216145A (en) * | 2007-03-06 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Partial discharge detection method |
| CN101408579A (en) * | 2008-11-21 | 2009-04-15 | 重庆大学 | Oil paper insulated electrothermic aging test and local discharge integrated detection device of transformer |
| CN102353877A (en) * | 2011-06-10 | 2012-02-15 | 河南电力试验研究院 | Partial discharge detection method for realizing phase resolved partial discharge (PRPD) pattern and time resolved partial discharge (TRPD) pattern |
| CN102435922A (en) * | 2011-10-26 | 2012-05-02 | 上海交通大学 | Acoustic-electric combined detection system and positioning method for GIS (Gas Insulated Switchgear) local discharge |
| KR20130047441A (en) * | 2011-10-31 | 2013-05-08 | 주식회사 효성 | Partial discharge diagnostic system of power apparatus using contactless phase measurement sensor |
| CN203502550U (en) * | 2013-10-24 | 2014-03-26 | 国家电网公司 | Partial discharge live detection device |
-
2013
- 2013-10-24 CN CN201310508713.4A patent/CN104569745B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216145A (en) * | 2007-03-06 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Partial discharge detection method |
| CN101408579A (en) * | 2008-11-21 | 2009-04-15 | 重庆大学 | Oil paper insulated electrothermic aging test and local discharge integrated detection device of transformer |
| CN102353877A (en) * | 2011-06-10 | 2012-02-15 | 河南电力试验研究院 | Partial discharge detection method for realizing phase resolved partial discharge (PRPD) pattern and time resolved partial discharge (TRPD) pattern |
| CN102435922A (en) * | 2011-10-26 | 2012-05-02 | 上海交通大学 | Acoustic-electric combined detection system and positioning method for GIS (Gas Insulated Switchgear) local discharge |
| KR20130047441A (en) * | 2011-10-31 | 2013-05-08 | 주식회사 효성 | Partial discharge diagnostic system of power apparatus using contactless phase measurement sensor |
| CN203502550U (en) * | 2013-10-24 | 2014-03-26 | 国家电网公司 | Partial discharge live detection device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548846A (en) * | 2016-02-01 | 2016-05-04 | 广州智丰电气科技有限公司 | Signal frequency conversion preposition module of portable intelligent four-channel partial discharge detector |
| CN105929310A (en) * | 2016-04-27 | 2016-09-07 | 支磊 | Device for detecting GIS partial discharge fault and detection method thereof |
| CN105929310B (en) * | 2016-04-27 | 2019-01-22 | 支磊 | A kind of device and its detection method detecting GIS partial discharge failure |
| CN106249054A (en) * | 2016-09-18 | 2016-12-21 | 广州供电局有限公司 | Capacitance type potential transformer and integration detection sensor thereof |
| CN106249054B (en) * | 2016-09-18 | 2019-12-10 | 广州供电局有限公司 | Capacitance type voltage transformer and integrated detection sensor thereof |
| CN108132427A (en) * | 2016-12-01 | 2018-06-08 | 成浩科电股份有限公司 | Partial discharge detection device and partial discharge detection method |
| CN108459244A (en) * | 2018-01-31 | 2018-08-28 | 天津大学 | Based on UHF and the united power cable partial discharge detecting systems of HFCT |
| CN108414900A (en) * | 2018-03-08 | 2018-08-17 | 云南电网有限责任公司电力科学研究院 | A kind of method and system of detection partial discharge of transformer |
| CN110412431A (en) * | 2019-08-05 | 2019-11-05 | 国网湖南省电力有限公司 | A kind of diagnostic method and diagnostic system of the shelf depreciation defect type of power equipment |
| CN111157864A (en) * | 2020-03-12 | 2020-05-15 | 广东电网有限责任公司 | Partial discharge ultrasonic signal and map recognition system and method |
| CN111157864B (en) * | 2020-03-12 | 2022-06-14 | 广东电网有限责任公司 | Partial discharge ultrasonic signal and map recognition system and method |
| CN112014691A (en) * | 2020-07-10 | 2020-12-01 | 国网安徽省电力有限公司电力科学研究院 | Multi-information fusion partial discharge detection terminal and method under power internet of things |
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