CN115480133A - Cable partial discharge detection device - Google Patents
Cable partial discharge detection device Download PDFInfo
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- CN115480133A CN115480133A CN202210932788.4A CN202210932788A CN115480133A CN 115480133 A CN115480133 A CN 115480133A CN 202210932788 A CN202210932788 A CN 202210932788A CN 115480133 A CN115480133 A CN 115480133A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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Abstract
The application relates to the field of electric power, concretely relates to cable partial discharge detection device. The cable partial discharge detection device comprises a signal acquisition module, a synchronous phasor measurement device and a data processing module. The signal acquisition module is electrically connected with the cable and is used for acquiring an initial electric signal on the cable; the synchronous phasor measuring device is electrically connected with the signal acquisition module and is used for receiving the initial electric signal and generating a processed electric signal after processing the initial electric signal; the data processing module is electrically connected with the synchronous phasor measuring device and is used for processing the electric signal and converting the processed electric signal into a digital signal; the digital signal includes detection information indicative of a partial discharge of the cable. The device can detect the partial discharge of the cable line on line, and ensure the reliability of power supply of a power grid; the existing synchronous phasor measuring devices at the two ends of the cable can be used for judging the partial discharge defect of the cable without installing other equipment, and the detection cost is low.
Description
Technical Field
The application relates to the field of electric power, concretely relates to cable partial discharge detection device.
Background
The cable mainly comprises a copper core, an insulating layer and a protective layer, and the copper core is used for conducting electric energy to transmit power to users. The insulating layer mainly isolates high voltage from the ground, and can electrically isolate the wire cores from the ground and the wire cores of different phases, so that the relative ground or interphase breakdown short circuit is avoided when electric energy is transmitted, and the insulating layer is also an indispensable component in a cable structure and can prevent short circuit accidents. Normally operating cables do not have current on the insulation, but the insulation layer can suffer from mechanical damage and damage caused by various environmental factors such as water, sunlight, biology, fire and the like during the cable laying and operation process, and high-frequency current can be generated on the insulation.
The urban power transmission and distribution line mainly utilizes cables to transmit power, large-scale cables enter the ground in 2000, the service life of the cables exceeds 15 years and exceeds 20 years at present, the cable insulation layer gradually enters an aging stage due to the fact that the cables are affected by external force, insulated and damped, chemically corroded, subjected to overload operation and the like, the insulation layer generates current in the operation process after the cable insulation layer is aged, and high-frequency components are mainly used in the current.
The common cable partial discharge detection method in the prior art often needs to quit the operation of the cable, namely an off-line detection mode, so that the cable quits the operation of a power grid to cause power failure of a user, and the power supply reliability is poor. However, some online detection methods are relatively affected by environmental interference factors, and all require additional experimental equipment to detect the partial discharge of the cable, so that the equipment cost is relatively high, and the circuit wiring is complex during detection.
Disclosure of Invention
In view of this, the application provides a cable partial discharge detection device, which solves or improves the problem that a common cable partial discharge detection method in the prior art often needs to quit the operation of a cable, that is, an offline detection mode, so that the cable quitting the operation of a power grid causes power failure of a user, and the power supply reliability is poor. However, some online detection methods are relatively affected by environmental interference factors, and all require additional experimental equipment to detect the partial discharge of the cable, so that the equipment cost is relatively high, and the circuit wiring is complex during detection.
According to an aspect of the present application, an embodiment of the present application provides a cable partial discharge detection apparatus, including: the signal acquisition module is electrically connected with the cable and is used for acquiring an initial electric signal on the cable; the synchronous phasor measuring device is electrically connected with the signal acquisition module and is used for receiving the initial electric signal and processing the initial electric signal to generate a processed electric signal; the data processing module is electrically connected with the synchronous phasor measuring device and is used for processing the processed electric signal and converting the processed electric signal into a digital signal; wherein the digital signal includes detection information indicative of partial discharge of the cable.
In one possible implementation manner of the present application, the synchrophasor measurement apparatus includes: the Beidou time service module receives the initial electric signal; the time synchronization device is connected with the Beidou time service module and is used for carrying out time synchronization on the initial electric signals; the signal power amplification module is connected with the time synchronization device and is used for performing power amplification processing on the initial electric signal; and the signal processing module is used for processing the initial electric signal processed by the signal power amplification module and generating the processed electric signal.
In a possible implementation manner of the present application, the signal power amplifier module includes: a signal filtering circuit for signal filtering the initial electrical signal.
In a possible implementation manner of the present application, the signal power amplifier module further includes: and the signal amplifying circuit is connected with the signal filtering circuit and is used for amplifying the initial electric signal.
In one possible implementation manner of the present application, the data processing module includes: the analog-to-digital conversion module is connected with the output end of the synchronous phasor measurement unit, and is used for converting the processed electric signal into the digital signal: and the central processing unit is connected with the analog-to-digital conversion module and used for calculating and processing the digital signal and generating the detection information.
In one possible implementation manner of the present application, the central processing unit includes: the partial discharge identification module is used for generating detection information according to the digital signal; and the data storage module is used for storing data.
In one possible implementation manner of the present application, the signal acquisition module includes: the first current transformer is connected with the first end of the cable and is used for detecting a first current signal of the first end of the cable; the second current transformer is connected with the second end of the cable and is used for acquiring a second current signal of the second end of the cable; wherein the initial electrical signal comprises the first current signal and the second current signal.
In one possible implementation manner of the present application, the cable partial discharge detection apparatus further includes: the PC end is in communication connection with the data processing module and receives the digital signal; wherein, the PC end includes: and the display module is used for processing and displaying the digital signal.
In one possible implementation manner of the present application, the cable partial discharge detection apparatus further includes: and the communication module is electrically connected with the data processing module and is in communication connection with the PC terminal, and the communication module is used for transmitting the digital signals.
In one possible implementation manner of the present application, the PC side includes a display module.
Compared with the prior art, the cable partial discharge detection device provided by the application has the advantages that:
this kind of cable partial discharge detection device includes: the device comprises a signal acquisition module, a synchronous phasor measurement device and a data processing module. The signal acquisition module is electrically connected with the cable and is used for acquiring an initial electric signal on the cable; the synchronous phasor measuring device is electrically connected with the signal acquisition module and is used for receiving the initial electric signal and processing the initial electric signal to generate a processed electric signal; the data processing module is electrically connected with the synchronous phasor measuring device and is used for processing the electric signal and converting the processed electric signal into a digital signal; wherein the digital signal includes detection information indicative of a partial discharge of the cable. The device utilizes the signal acquisition module to acquire the electric signal at the local position in the cable, if the cable has a partial discharge phenomenon, the position can generate a high-frequency partial discharge current signal, the signal acquisition module outputs the electric signal to the synchronous phasor measurement device after acquiring the initial electric signal, the synchronous phasor measurement device and the data processing module process and analyze the electric signal, and the data processing module outputs detection information which is used for indicating whether the cable to be detected has a leakage phenomenon or not, and the method can realize the identification of the partial discharge defect of the cable. In addition, the detection device can detect partial discharge of the cable line in operation on line without the cable exiting operation, and can ensure the reliability of power supply of a power grid; extra equipment does not need to be installed on the cable, the local discharge defect of the cable can be judged by using the synchronous phasor measuring devices installed at the two ends of the cable, and the detection cost is reduced.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, and are not intended to limit the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to an embodiment of the present application.
Fig. 2 is a schematic diagram illustrating a working principle of a signal acquisition module in a cable partial discharge detection apparatus according to another embodiment of the present disclosure.
Fig. 3 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present disclosure.
Fig. 4 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present application.
Fig. 5 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present application.
Fig. 6 is a schematic diagram illustrating an operation of a central processing unit of a cable partial discharge detection apparatus according to another embodiment of the present application.
Fig. 7 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present application.
Description of reference numerals: 100. a signal acquisition module; 101. a first current transformer; 102. a second current transformer; 200. a synchronized phasor measurement device; 201. a Beidou time service module; 202. a time synchronization device; 203. a signal power amplifier module; 2031. a signal filtering circuit; 2032. a signal amplification circuit; 204. a signal processing module; 300. a data processing module; 301. an analog-to-digital conversion module; 302. a central processing unit; 3021. a partial discharge identification module; 3022. a data storage module; 400. a PC terminal; 401. a display module; 500. and a communication module.
Detailed Description
In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. In the embodiment of the present application, all directional indicators (such as up, down, left, right, front, rear, top, bottom \8230;) are used only to explain the relative positional relationship between the components, the motion, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Summary of the application
For a common cable partial discharge detection method, the applicant often needs to quit the operation of the cable, namely an offline detection mode, so that the cable quitting the operation of the power grid can cause the power failure of a user, and the power supply reliability is poor. However, some online detection methods are relatively large in environmental interference factors, and all require additional experimental equipment to detect the partial discharge of the cable, so that the cost of the equipment is relatively high, and the reasons for complex circuit wiring during detection are further analyzed, and the following results are obtained:
the cable mainly comprises a copper core, an insulation layer and a protection layer, and the copper core is used for conducting electric energy to transmit power to users. The insulating layer is mainly used for isolating high voltage from the ground, and can electrically isolate the wire cores from the ground and the wire cores of different phases, so that the relative ground or interphase breakdown short circuit is avoided when electric energy is transmitted, and the insulating layer is also an indispensable component in a cable structure and can prevent short circuit accidents. In a normally operated cable, no current exists on the insulation, but the insulation layer can be damaged by mechanical damage and various environmental factors such as water, sunlight, organisms, fire disasters and the like during the process of laying and operating the cable, and high-frequency current can be generated on the insulation.
The urban power transmission and distribution line mainly utilizes cables to transmit power, large-scale cables enter the ground in 2000, the service life of the cables exceeds 15 years and exceeds 20 years at present, the cable insulation layer gradually enters an aging stage due to the fact that the cables are affected by external force, insulated and damped, chemically corroded, subjected to overload operation and the like, the insulation layer generates current in the operation process after the cable insulation layer is aged, and high-frequency components are mainly used in the current.
The currently common partial discharge detection methods include the following methods:
1. the pulse current method is internationally recognized as the most basic method for detecting partial discharge of most insulating equipment, but has higher requirements on a test power supply and the environment;
2. the oscillatory wave test method is an advanced offline cable partial discharge detection technology at present;
3. the ultrasonic detection method is to measure the size and position of partial discharge by detecting ultrasonic signals generated by partial discharge of power equipment, and the monitoring frequency band for online monitoring of the partial discharge is generally between 20kHz and 230 kHz;
4. the Ultra High Frequency (UHF) method is a new method for detecting partial discharge at present.
The two methods or the off-line method for detecting the insulation state of the cable can cause power failure of a large number of users after the cable exits from operation; or additional detection equipment is required to be added in the online detection process, and the influence of environmental factors is large.
Accordingly, the present application provides a cable partial discharge detection apparatus, comprising: a signal acquisition module 100, a synchrophasor measurement apparatus 200, and a data processing module 300. The signal acquisition module 100 is electrically connected with the cable, and the signal acquisition module 100 is used for acquiring an initial electric signal on the cable; the synchronous phasor measurement device 200 is electrically connected with the signal acquisition module 100, and the synchronous phasor measurement device 200 is used for receiving an initial electrical signal, processing the initial electrical signal and generating a processed electrical signal; the data processing module 300 is electrically connected to the synchrophasor measurement apparatus 200, and the data processing module 300 is configured to process the electrical signal and convert the processed electrical signal into a digital signal; wherein the digital signal includes detection information indicative of a partial discharge of the cable.
The device utilizes the signal acquisition module 100 to acquire the electric signal at the local position in the cable, if the cable has a partial discharge phenomenon, the position can generate a high-frequency partial discharge current signal, after the signal acquisition module 100 acquires the initial electric signal, the electric signal is output to the synchronous phasor measurement device 200, after the synchronous phasor measurement device 200 and the data processing module 300 are used for processing and analyzing, the data processing module 300 outputs detection information, the detection information is used for indicating whether the cable to be detected has a leakage phenomenon, and the identification of the partial discharge defect of the cable can be realized by utilizing the mode. In addition, the detection device can detect partial discharge of the cable line in operation on line without the cable exiting operation, and can ensure the reliability of power supply of a power grid; the method has the advantages that extra equipment does not need to be installed on the cable, the partial discharge defects of the cable can be judged by using the synchronous phasor measurement device 200 installed at the two ends of the cable, and the detection cost is reduced.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a cable partial discharge detection apparatus according to an embodiment of the present application, and as shown in fig. 1, the cable partial discharge detection apparatus provided by the present application may specifically include: a signal acquisition module 100, a synchrophasor measurement apparatus 200, and a data processing module 300.
The signal acquisition module 100 is electrically connected to the cable, and the signal acquisition module 100 is used for acquiring an initial electrical signal on the cable to be tested.
Specifically, fig. 2 is a schematic diagram of a signal acquisition module in a cable partial discharge detection apparatus according to another embodiment of the present disclosure. As shown in fig. 2, the specific working principle of the signal acquisition module 100 is as follows:
first, the input end of the signal acquisition module 100 is electrically connected to a point to be measured of the cable to be measured. Because one end of a high-voltage power supply connected with a cable is grounded, the other end of the high-voltage power supply is connected with a power supply equivalent resistor, and then the high-voltage power supply is connected with the cable to transmit electric energy by using the cable. The cable mainly comprises three layers: the cable comprises a copper core, an insulating layer and a protective layer, wherein when the insulating layer is in a normal state, the current I3=0 on the insulating layer, and the current on two sides of the cable is equal, namely I1= I2.
When partial discharge occurs at the cable insulation layer, a high-frequency partial discharge current I3 is generated at the cable insulation layer, at the moment, I3 is not equal to 0 and contains a high-frequency component, I1 is not equal to I2 because I2= I1+ I3, and I2 also contains the high-frequency component, the more serious the partial discharge is, the more high-frequency components are contained in I2, the acquisition of a cable partial discharge electric signal can be realized by using the method, and further the identification of the cable partial discharge defect is carried out.
Secondly, the input end of the synchrophasor measurement apparatus 200 is electrically connected to the output end of the signal acquisition module 100, and the synchrophasor measurement apparatus 200 is configured to receive the initial electrical signal acquired by the signal acquisition module 100, and process the initial electrical signal to generate a processed electrical signal. The processed electrical signal is an electrical signal that the data processing module 300 can convert between an electrical signal and a digital signal.
The input end of the data processing module 300 is electrically connected to the output end of the synchronous phasor measurement apparatus 200, and the data processing module 300 is configured to further process the processed electrical signal and convert the processed electrical signal into a digital signal; wherein, the digital signal includes the detection information used for expressing the partial discharge of cable.
The device utilizes the signal acquisition module 100 to acquire the electric signal at the local position in the cable, if the cable has a partial discharge phenomenon, the position can generate a high-frequency partial discharge current signal, after the signal acquisition module 100 acquires the initial electric signal, the electric signal is output to the synchronous phasor measurement device 200, after the synchronous phasor measurement device 200 and the data processing module 300 are used for processing and analyzing, the data processing module 300 outputs detection information, the detection information is used for indicating whether the cable to be detected has a leakage phenomenon, and the identification of the partial discharge defect of the cable can be realized by utilizing the mode. In addition, the detection device can detect partial discharge of the cable line in operation on line without the cable exiting operation, and can ensure the reliability of power supply of a power grid; the method has the advantages that extra equipment does not need to be installed on the cable, the partial discharge defects of the cable can be judged by using the synchronous phasor measurement device 200 installed at the two ends of the cable, and the detection cost is reduced.
In a possible implementation manner, fig. 3 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present application. As shown in fig. 3, the synchrophasor measurement apparatus 200 may further include: the Beidou time service module 201, the time synchronization device 202, the signal power amplification module 203 and the signal processing module 204.
The beidou Time service module 201 is a module that transmits a standard Time signal transmitted by a national Time service center, that is, universal Time Coordinated (UTC), which is currently Universal standard Time. The Beidou time service module 201 enables the cable partial discharge detection device to obtain an accurate and unified time reference, and various automatic processes tend to be synchronous, so that accidents can be further reduced.
The time synchronization device 202 is connected with the Beidou time service module 201, and the time synchronization device 202 is used for performing time synchronization of an initial electric signal on the initial electric signal in cooperation with the Beidou time service module 201.
The input end of the signal power amplifier module 203 is connected with the output end of the time synchronizer 202, and the signal power amplifier module 203 is used for performing power amplifier processing on the initial electric signal, including but not limited to filtering, amplifying, denoising and the like on the initial electric signal, so that a subsequent device can acquire a more accurate electric signal, and therefore judgment of a partial discharge result is performed.
The input end of the signal processing module 204 is connected to the output end of the signal power amplifier module 203, and the signal processing module 204 is configured to process the initial electrical signal processed by the signal power amplifier module 203 and generate a processed electrical signal. The processed electrical signal is an electrical signal that can be received by the subsequent data processing module 300 and can be converted into a digital signal.
Through the cooperation between big dipper time service module 201, time synchronizer 202, signal power amplifier module 203 and the signal processing module 204, carry out the transmission and the processing of initial signal of telecommunication for initial signal of telecommunication can be converted into and handle the signal of telecommunication, conversion effect and conversion accuracy between the follow-up signal of telecommunication and digital signal help.
Specifically, in an embodiment of the present application, fig. 4 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present application. As shown in fig. 4, the signal power amplifier module 203 may specifically include: the signal filtering circuit 2031.
The signal filtering circuit 2031 receives the synchronized initial electrical signal at first, and performs signal filtering on the initial electrical signal to filter out interference signals, thereby improving the reliability of the initial electrical signal and facilitating accurate determination of whether a discharge result occurs locally in a subsequent cable.
Specifically, in another embodiment of the present application, as shown in fig. 4, the signal power amplifier module 203 may further include: the signal amplification circuit 2032.
The input end of the signal amplifying circuit 2032 is connected to the output end of the signal filtering circuit 2031, and the signal amplifying circuit 2032 amplifies the initial electrical signal after receiving the filtered initial electrical signal, which is more favorable for the effective conversion of the electrical signal into a digital signal.
In addition, the signal power amplifier module 203 may further include a signal noise reduction circuit, and the signal noise reduction circuit performs noise reduction processing on the initial electrical signal.
In another possible implementation manner of the present application, fig. 5 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of the present application. As shown in fig. 5, the data processing module 300 may further include: an analog-to-digital conversion module 301 and a central processing unit 302 (CPU for short).
The input end of the analog-to-digital conversion module 301 is connected to the output end of the synchronous phasor measurement apparatus 200, and the analog-to-digital conversion module 301 is configured to convert the processed electrical signal into a digital signal.
The input end of the central processing unit 302 is connected to the output end of the analog-to-digital conversion module 301, so that the central processing unit 302 can further calculate and process the digital signal and generate the detection information.
Through the cooperation of the analog-to-digital conversion module 301 and the central processing unit 302, the processed electrical signal is converted into a digital signal which can be identified and calculated by an algorithm, and then the detection information is effectively and accurately generated.
Optionally, fig. 6 is a schematic diagram illustrating an operation of a central processing unit of a cable partial discharge detection apparatus according to another embodiment of the present application. As shown in fig. 6, the central processor 302 may further include: a partial discharge recognition module 3021 and a data storage module 3022.
The partial discharge recognition module 3021 is pre-programmed with a partial discharge recognition algorithm, and the algorithm may generate detection information according to the digital signal output by the analog-to-digital conversion module 301.
The data storage module 3022 is used to store the current data in the digital signal and the detection information data generated by the cigarette processor, so that the staff member can call the data when necessary.
In a possible implementation manner of this application, fig. 7 is a schematic diagram illustrating an operation of a cable partial discharge detection apparatus according to another embodiment of this application. As shown in fig. 7, the signal acquisition module 100 may further include: a first current transformer 101 and a second current transformer 102.
The first current transformer 101 is connected to a first end of the cable, and the first current transformer 101 is configured to detect a first current signal at the first end of the cable; the second current transformer 102 is connected to the second end of the cable, and the second current transformer 102 is configured to collect a second current signal at the second end of the cable. In addition, the initial current signal includes the first current signal and the second current signal.
The first current transformer 101 and the second current transformer 102 collect and transmit the current and the electric signal generated on the cable, so that the cable partial discharge detection device can perform discharge detection.
Specifically, in another embodiment of the present application, as shown in fig. 7, the cable partial discharge detection apparatus may further include a PC terminal 400, where the PC terminal 400 is communicatively connected to the data processing module 300 and receives the digital signal transmitted by the data processing module 300.
In addition, the PC terminal 400 further includes: a display module 401.
This display module 401 is used for handling and showing digital signal and detected information, so make the staff can learn the cable partial discharge condition more directly perceivedly, in time the maintenance is handled, reduces the probability that the incident takes place, guarantees cable operation safety.
The display module 401 may be a display or a control interface of a control system. In addition, except that showing detection information, when taking place cable partial discharge, detection device can also carry out the warning of other forms, like reminding through mode such as reputation suggestion or bee calling organ, so that the staff can learn the cable trouble the very first time, further ensures the operation safety of cable.
Optionally, as shown in the figure, the cable partial discharge detection apparatus may further include: a communication module 500.
The communication module 500 is electrically connected to the data processing module 300 and is communicatively connected to the PC terminal 400, and the communication module 500 is used for transmitting digital signals.
The specific working principle of the cable partial discharge detection device provided by the application is as follows:
firstly, the cable partial discharge detection device specifically includes: the system comprises a signal acquisition module 100, a synchrophasor measurement apparatus 200, a data processing module 300 and the like. The signal acquisition module 100 is electrically connected with the cable, and the signal acquisition module 100 is used for acquiring an initial electric signal on the cable; the synchronous phasor measurement device 200 is electrically connected with the signal acquisition module 100, and the synchronous phasor measurement device 200 is used for receiving an initial electrical signal, processing the initial electrical signal and generating a processed electrical signal; the data processing module 300 is electrically connected to the synchrophasor measurement apparatus 200, and the data processing module 300 is configured to process the electrical signal and convert the processed electrical signal into a digital signal; wherein the digital signal includes detection information indicative of a partial discharge of the cable.
The output end of the signal acquisition module 100 is connected with the input end of the synchronized phasor measurement device 200, the output end of the big dipper time service module 201 in the synchronized phasor measurement device 200 is connected with the input end of the time synchronization device 202, the output end of the time synchronization device 202 is connected with the input end of the signal synchronization circuit in the signal power amplification module 203, the output end of the signal power amplification module 203 is connected with the input end of the signal processing module 204, the output end of the signal processing module 204 is connected with the input end of the analog-to-digital conversion module 301, the output end of the analog-to-digital conversion module 301 is connected with the central processing unit 302 (CPU), the CPU is connected with the data storage module 3022, the algorithm related to the partial discharge recognition module 3021 is programmed into the CPU, the output end of the CPU is connected with the communication module 500, the communication module 500 is connected with the PC end 400, and the display module 401 in the PC end 400 displays the cable partial discharge defect state.
The block diagrams of devices, apparatuses, systems referred to in this application are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should also be noted that in the devices, apparatuses, and methods of the present application, each component or step can be decomposed and/or re-combined. These decompositions and/or recombinations should be considered as equivalents of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A cable partial discharge detection apparatus, comprising:
the signal acquisition module (100), the signal acquisition module (100) is electrically connected with a cable, and the signal acquisition module (100) is used for acquiring an initial electric signal on the cable;
the synchronous phasor measurement device (200), the synchronous phasor measurement device (200) is electrically connected with the signal acquisition module (100), and the synchronous phasor measurement device (200) is used for receiving the initial electric signal and processing the initial electric signal to generate a processed electric signal; and
a data processing module (300), wherein the data processing module (300) is electrically connected with the synchrophasor measurement device (200), and the data processing module (300) is used for processing the processed electric signal and converting the processed electric signal into a digital signal; wherein the digital signal includes detection information indicative of partial discharge of the cable.
2. The cable partial discharge detection device according to claim 1, wherein the synchrophasor measurement device (200) comprises:
the Beidou time service module (201), wherein the Beidou time service module (201) receives the initial electric signal;
the time synchronization device (202), the time synchronization device (202) is connected with the Beidou time service module (201), and the time synchronization device (202) is used for performing time synchronization on the initial electric signal;
the signal power amplifier module (203), the signal power amplifier module (203) is connected with the time synchronizer (202), and the signal power amplifier module (203) is used for performing power amplifier processing on the initial electric signal;
the signal processing module (204), the signal processing module (204) is used for processing the initial electric signal processed by the signal power amplification module (203) and generating the processed electric signal.
3. The cable partial discharge detection device of claim 2, wherein the signal power amplifier module (203) comprises:
a signal filtering circuit (2031) for signal filtering the initial electrical signal.
4. The cable partial discharge detection device of claim 3, wherein the signal power amplifier module (203) further comprises:
a signal amplification circuit (2032), wherein the signal amplification circuit (2032) is connected to the signal filtering circuit (2031), and the signal amplification circuit (2032) is used for signal amplification of the initial electric signal.
5. The cable partial discharge detection device according to claim 1, wherein the data processing module (300) comprises:
an analog-to-digital conversion module (301), the analog-to-digital conversion module (301) being connected to an output of the synchronized phasor measurement device (200), the analog-to-digital conversion module (301) being configured to convert the processed electrical signal into the digital signal:
the central processing unit (302), the central processing unit (302) is connected with the analog-to-digital conversion module (301), and the central processing unit (302) is used for calculating and processing the digital signal and generating the detection information.
6. The cable partial discharge detection device of claim 5, wherein the central processor (302) comprises:
a partial discharge recognition module (3021), the partial discharge recognition module (3021) being configured to generate detection information from the digital signal;
a data storage module (3022), said data storage module (3022) being configured to store data.
7. The cable partial discharge detection device according to claim 1, wherein the signal acquisition module (100) comprises:
a first current transformer (101), wherein the first current transformer (101) is connected with the first end of the cable, and the first current transformer (101) is used for detecting a first current signal of the first end of the cable;
a second current transformer (102), wherein the second current transformer (102) is connected with the second end of the cable, and the second current transformer (102) is used for acquiring a second current signal of the second end of the cable;
wherein the initial electrical signal comprises the first current signal and the second current signal.
8. The cable partial discharge detection device of claim 1, further comprising:
the PC terminal (400), the PC terminal (400) is connected with the data processing module (300) in a communication mode, and the PC terminal (400) receives the digital signals;
wherein the PC side (400) comprises:
a display module (401), wherein the display module (401) is used for processing and displaying the digital signal.
9. The cable partial discharge detection device of claim 8, further comprising:
the communication module (500), the communication module (500) is electrically connected with the data processing module (300) and is in communication connection with the PC terminal (400), and the communication module (500) is used for transmitting the digital signals.
10. The cable partial discharge detection device according to claim 8, wherein the PC terminal (400) includes a display module (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210932788.4A CN115480133A (en) | 2022-08-04 | 2022-08-04 | Cable partial discharge detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210932788.4A CN115480133A (en) | 2022-08-04 | 2022-08-04 | Cable partial discharge detection device |
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| Publication Number | Publication Date |
|---|---|
| CN115480133A true CN115480133A (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210932788.4A Pending CN115480133A (en) | 2022-08-04 | 2022-08-04 | Cable partial discharge detection device |
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| Country | Link |
|---|---|
| CN (1) | CN115480133A (en) |
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2022
- 2022-08-04 CN CN202210932788.4A patent/CN115480133A/en active Pending
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