CN108333485A - A kind of partial discharge of switchgear monitoring system - Google Patents
A kind of partial discharge of switchgear monitoring system Download PDFInfo
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- CN108333485A CN108333485A CN201810071659.4A CN201810071659A CN108333485A CN 108333485 A CN108333485 A CN 108333485A CN 201810071659 A CN201810071659 A CN 201810071659A CN 108333485 A CN108333485 A CN 108333485A
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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
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Abstract
The present invention relates to a kind of partial discharge of switchgear to monitor system comprising：Several Site Detection modules, monitoring center module and several remote terminals, Site Detection module includes ultrasonic measuring unit, transient state ground wave measuring unit, microprocessor and field data server, ultrasonic measuring unit, transient state wave measuring unit and field data server connect with microprocessor, monitoring center module includes database server and WEB server, database server is connect with WEB server, database server is connect with field data server communication, and WEB server is communicated to connect with several remote terminals.The present invention realizes the partial discharge detection of switchgear by ultrasonic with involving transient state electric wave principle principle, since measuring unit is positioned over inside switch cabinet, and sensor is small by external disturbance, the abnormal conditions in cabinet can really be reacted, secondly monitoring display, unified management of analysis and early warning and equipment are realized, staff is facilitated to find in time and process problem.
Description
Technical field
The present invention relates to a kind of switchgear detection technique, specifically a kind of partial discharge of switchgear monitors system.
Background technology
High-tension switch cabinet is using extremely wide and most quantity switchgears.Due in design, manufacture, installation and operation dimension
The problem of shield etc. various degrees, thus accident rate is relatively high, in the switchgear accident of many properties, insulate thing
Therefore mostly occur in 10 kilovolts and above, caused by consequence it is also very serious.Especially trolley type switch cabinet, insulation fault
Rate higher, and the phenomenon that often one accident occurs, brings disaster to adjacent cabinet, is more prominent.Therefore, there is an urgent need to carry out switchgear
Repair based on condition of component carries out real time on-line monitoring, according to the degradation of the operating status of equipment and insulation, really to equipment operation condition
Determine repair time and measure, reduce the generation of power off time and accident, improves the security reliability of Operation of Electric Systems and automatic
Change degree.
The insulation fault of high-tension switch cabinet is mainly shown as external insulation flashover breakdown over the ground, interior insulation flashover breakdown over the ground,
Phase insulation flashover breakdown, lightning surge flashover breakdown, porcelain bottle sleeve, pollution flashover, hit sudden strain of a muscle, are breakdown, quick-fried capacitance graded bushing flashover
It is fried, lift lever flashover, CT flashovers, breakdown, explosion, porcelain insulator breaking etc..All kinds of insulation defects develop to final breakdown, lead to a disaster
Before, the shelf depreciation stage is often first passed through, the power of shelf depreciation can reflect state of insulation in time, therefore by supervising online
Shelf depreciation is surveyed to judge that state of insulation is the effective means for realizing switchgear insulated on-line monitoring and diagnosis.
The detection of partial discharge of switchgear at present is mainly with the electric pulse principle of power failure pressing type and unusual contact
Ultrasonic wave, transient state based on electric wave principle, switch cabinet electrified detection determines that traditional pulsed principle is unable to reach efficient inspection
The purpose of survey, and the problem of very contact principle also faces detection efficiency and reliability, secondly because switchgear enormous amount,
Widely distributed, how to carry out unified management to switchgear is always a problem.
Invention content
The purpose of the present invention is being directed to above-mentioned present situation, a kind of partial discharge of switchgear monitoring system is provided.
The technical solution adopted by the present invention is：A kind of partial discharge of switchgear monitoring system, including：Several Site Detection moulds
Block, a monitoring center module and several remote terminals, the Site Detection module include ultrasonic measuring unit, transient state ground electric wave
Measuring unit, microprocessor and field data server, the ultrasonic measuring unit, the transient state wave measuring unit and
The field data server is connect with the microprocessor, and the monitoring center module includes a database server and one
WEB server, the database server are connect with the WEB server, the database server and the field data
Server communication connects, and the WEB server is communicated to connect with several remote terminals.
The present invention effect be：A kind of partial discharge of switchgear of the present invention monitors system, is involved temporarily by ultrasound
State electric wave principle principle realize switchgear partial discharge detection, since measuring unit is positioned over inside switch cabinet, and sensor
It is small by external disturbance, the abnormal conditions in cabinet can be really reacted, secondly realize data mass memory, monitoring display, analysis
Early warning, data mining and the unified management of equipment facilitate staff to find in time and process problem.
Description of the drawings
Fig. 1 show a kind of structural schematic diagram of partial discharge of switchgear monitoring system provided by the invention；
Fig. 2 show the structural schematic diagram of ultrasonic measuring unit in Fig. 1；
The structural schematic diagram of Fig. 3 with showing transient state in Fig. 1 wave measuring units；
Fig. 4 show the circuit structure diagram of the first bandwidth-limited circuit in Fig. 2；
It is the circuit structure diagram of the first biasing circuit in Fig. 2 described in Fig. 5；
Fig. 6 show the circuit structure diagram of the second bandwidth-limited circuit in Fig. 3；
It is the circuit structure diagram of the second biasing circuit in Fig. 3 described in Fig. 7.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
The partial discharge of switchgear monitoring system of the present invention is introduced below in conjunction with the accompanying drawings：
It please refers to Fig.1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, for a kind of partial discharge of switchgear prison provided by the invention
Examining system, including：Several Site Detection modules 1, a monitoring center module 2 and several remote terminals 3, several Site Detections
Module 1 is connect with the monitoring center module 2, and several remote terminals 3 are connect with the monitoring center module 2.
The Site Detection module 1 includes a ultrasonic measuring unit 11, a transient state ground wave measuring unit 12, a micro- place
Manage device 13 and a field data server 14, the ultrasonic measuring unit 11, the transient state ground wave measuring unit 12 and institute
Field data server 14 is stated to connect with the microprocessor 13.
The ultrasonic measuring unit 11 includes ultrasonic sensor 111, the first amplifying circuit 112, the first bandpass filtering
Circuit 113, the first biasing circuit 114, the first FPGA data collector 115, the first system power supply 116, the first display device 117
And first warning device 118.The ultrasonic sensor 111 is electrically connected with first amplifying circuit 112, and described first puts
Big circuit 112 is electrically connected with first bandwidth-limited circuit 113 and the first system power supply 116, first biasing
Circuit 114 is electrically connected with the first FPGA data collector 115 and the first system power supply 116, the first FPGA
Data collector 115 electrically connects with first display device 117, first warning device 118 and the microprocessor 13
It connects.
First bandwidth-limited circuit 113 includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4, the 5th resistance R5, the 6th resistance R6, the first capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the 5th capacitance
C5, the 6th capacitance C6, the first operational amplifier U1, second operational amplifier U2 and third operational amplifier U3, first electricity
Resistance one end R1 is connect with first amplifying circuit 112, one end of the first resistor R1 other ends and the second resistance R2
And one end connection of the first capacitance C1, the one end of the first capacitance C1 far from the first resistor R1 is transported with described first
The one end for calculating the reverse input end of amplifier U1, the output end of the first operational amplifier U1 and the third capacitance C3 connects
Connect, the positive input of the one end of the second resistance R2 far from the first resistor R1 and the first operational amplifier U1 and
One end of the second capacitance C2 connects, the other end ground connection of the second capacitance C2, and the third capacitance C3 is far from described the
One end of one operational amplifier U1 is connect with one end of one end of the 3rd resistor R3 and the 4th capacitance C4, and the described 4th
The other end of capacitance C4 is connect with the positive input of one end of the 4th resistance R4 and the second operational amplifier U2, institute
State the other end ground connection of the 4th resistance R4, the one end of the 3rd resistor R3 far from the third capacitance C3 and second operation
One end of amplifier U2 output ends, the reverse input end of the second operational amplifier U2 and the 5th capacitance C5 connects, institute
The other end for stating the 5th capacitance C5 is connect with one end of one end of the 5th resistance R5 and the 6th capacitance C6, and the described 6th
The other end of capacitance C6 is connect with one end of the positive input of the third operational amplifier U3 and the 6th resistance R6, institute
State the other end ground connection of the 6th resistance R6, the one end of the 5th resistance R5 far from the 5th capacitance C5 and the third operation
The reverse input end of amplifier U3, the output end of third operational amplifier U3 and first biasing circuit 114 connection.
First biasing circuit 114 include the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10,
Eleventh resistor R11, four-operational amplifier U4, the first diode D1 and the second diode D2, the one of the 7th resistance R7
End is connect with first bandwidth-limited circuit 113, the other end of the 7th resistance R7 and one end of the 8th resistance R8,
One end of the tenth resistance R10 and the positive input connection of the four-operational amplifier U4, the 8th resistance R8's
The other end is grounded, one end and the described 11st of the reverse input end and the 9th resistance R9 of the four-operational amplifier U4
One end of resistance R11 connects, the other end ground connection of the 9th resistance R9, the other end of the eleventh resistor R11 with it is described
The anode connection of the output end of four-operational amplifier U4, the cathode of the first diode D1 and the second diode D2,
The first diode D1 anode with the described one end of tenth resistance R10 far from the 7th resistance R7 altogether, described second
The cathode of diode D2 is grounded.
The ultrasonic sensor 111 is used to receive the low frequency signal in local discharge signal, and frequency is：20~
200kHz, due to weak output signal, output amplitude is too small, it is therefore desirable to the amplifying circuit 112 be added, may amplify the signal to data
The signal that acquisition system can identify commonly reaches 80~90dB since gain is higher, therefore can amplify useless high frequency letter
Number, need that first bandwidth-limited circuit 113 filters out useless high-frequency signal and first biasing circuit 114 is to institute
The output for stating the first bandwidth-limited circuit 113 is biased adjusting, and the signal handled well will be directed into the first FPGA
Data collector 115, the first FPGA data collector 115 are responsible for the behaviour such as data high-speed samples and numerical value shows or alarms
The microprocessor 13 made, while connected then is responsible for the control to FPGA data collector.
The transient state wave measuring unit 12 include TEV sensors 121, the second amplifying circuit 122, the second bandpass filtering
Circuit 123, the second biasing circuit 124, the second FPGA data collector 125, second system power supply 126, the second display device 127
And second warning device 128.The TEV sensors 121 are electrically connected with second amplifying circuit 122, second amplification
Circuit 122 is electrically connected with second bandwidth-limited circuit 123 and the second system power supply 126, second biased electrical
Road 124 is electrically connected with the second FPGA data collector 125 and the second system power supply 126, the 2nd FPGA numbers
It is electrically connected according to collector 125 and second display device 127, the second warning device 128 and microprocessor 13.
Second bandwidth-limited circuit 123 include twelfth resistor R12, thirteenth resistor R13, the 14th resistance R14,
15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 7th capacitance C7, the 8th capacitance C8, the 9th capacitance C9,
Ten capacitance C10, the 11st capacitance C11, the 12nd capacitance C12, the 5th operational amplifier U5, the 6th operational amplifier U6 and the 7th
Operational amplifier U7, the one end the twelfth resistor R12 are connect with first amplifying circuit 112, the twelfth resistor R12
The other end is connect with one end of one end of the thirteenth resistor R13 and the 7th capacitance C7, and the 7th capacitance C7 is separate
The reverse input end, the 5th operational amplifier of one end of the twelfth resistor R12 and the 5th operational amplifier U5
One end of the output end of U5 and the 9th capacitance C9 connect, and the thirteenth resistor R13 is far from the twelfth resistor R12's
One end is connect with one end of the positive input of the 5th operational amplifier U5 and the 8th capacitance C8, the 8th capacitance
The other end of C8 is grounded, the one end of the 9th capacitance C9 far from the 5th operational amplifier U5 and the 14th resistance
One end of R14 and the connection of one end of the tenth capacitance C10, the other end and the 15th resistance of the tenth capacitance C10
The positive input of one end of R15 and the 6th operational amplifier U6 connect, another termination of the 15th resistance R15
Ground, it is the one end of the 14th resistance R14 far from the 9th capacitance C9 and the 6th operational amplifier U6 output ends, described
One end of the reverse input end of 6th operational amplifier U6 and the 11st capacitance C11 connect, the 11st capacitance C11's
The other end is connect with one end of one end of the 16th resistance R16 and the 12nd capacitance C12, the 12nd capacitance
The other end of C12 is connect with one end of the positive input of the 7th operational amplifier U7 and the 17th resistance R17, institute
State the other end ground connection of the 17th resistance R17, the 16th resistance R16 one end and institute far from the 11st capacitance C11
State the reverse input end of the 7th operational amplifier U7, the output end of the 7th operational amplifier U7 and second biasing circuit 124
Connection.
Second biasing circuit 124 includes the 18th resistance R18, the 19th resistance R19, the 20th resistance R20, second
11 resistance R21, the 22nd resistance R22, the 8th operational amplifier U8, third diode D3 and the 4th diode D4, it is described
One end of 18th resistance R18 is connect with second bandwidth-limited circuit 123, the other end of the 18th resistance R18 with
One end, one end of the 21st resistance R21 and the forward direction of the 8th operational amplifier U8 of the 19th resistance R19
Input terminal connects, the other end ground connection of the 19th resistance R19, the reverse input end of the 8th operational amplifier U8 and institute
One end of the 20th resistance R20 and one end connection of the 22nd resistance R22 are stated, the 20th resistance R20's is another
End ground connection, the other end of the 22nd resistance R22 and the output end of the 8th operational amplifier U8, the three or two pole
The anode connection of the cathode of pipe D3 and the 4th diode D4, the anode of the third diode D3 and the 21st electricity
Hinder the one end of R21 far from the 18th resistance R18 altogether, the cathode of the 4th diode D4 is grounded.
The TEV wave sensors 121 are used to receive the low frequency signal in local discharge signal, and frequency is：20~200kHz,
Due to weak output signal, output amplitude is too small, it is therefore desirable to second amplifying circuit 122 be added, may amplify the signal to data and adopt
The signal that collecting system can identify commonly reaches 80~90dB, therefore can amplify useless high-frequency signal since gain is higher,
Need that second bandwidth-limited circuit 123 filters out useless high-frequency signal and second biasing circuit 124 is to described
The output of second bandwidth-limited circuit 123 is biased adjusting, and the signal handled well will be directed into the 2nd FPGA numbers
According to collector 125, the second FPGA data collector 125 is responsible for the operations such as data high-speed samples and numerical value shows or alarms,
The microprocessor 13 of connection is then responsible for the control to FPGA data collector 125 simultaneously.
The monitoring center module 2 includes a database server 21 and a WEB server 22, the database server
21 connect with the WEB server 22, and the database server 21 is communicated to connect with the field data server 14, described
WEB server 22 is communicated to connect with several remote terminals 3.
Working principle of the present invention is as follows：
TEV sensors are for receiving the transient state voltage-to-ground signal that shelf depreciation is generated in switch cabinet wall；Ultrasonic wave passes
Sensor is for receiving the ultrasonic signal that shelf depreciation generates in space；Monitor the continuous reality that terminal is used for two-way sensor signal
When acquisition, digitized processing, onsite alarming etc., and with on-site data gathering server communication, complete data upload；Field data
Data are packaged, encryption by acquisition server for continuous acquisition, the data that are uploaded of storage monitoring terminal, and with positioned at supervision
The database server at center communicates, and completes data and uploads.
Database server is used to receive the data of on-site data gathering server upload, realizes data mass memory, prison
It surveys display, analysis and early warning, data mining, equipment unified management, generate the functions such as various types report；WEB server is mainly real
Existing monitoring data and data analysis, the WEB publications of Result.
Remote terminal can understand switch cabinet of converting station state of insulation, at data in time by accessing WEB server
Reason result judges in time, adopts an effective measure.
A kind of partial discharge of switchgear of the present invention monitors system, passes through ultrasound with involving transient state electric wave principle principle
Realize the partial discharge detection of switchgear, since measuring unit is positioned over inside switch cabinet, and sensor is small by external disturbance, can
Secondly abnormal conditions in true reaction cabinet are realized data mass memory, monitoring display, analysis and early warning, data mining and are set
Standby unified management facilitates staff to find in time and process problem.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of partial discharge of switchgear monitors system, which is characterized in that including：Several Site Detection modules, a monitoring center
Module and several remote terminals, the Site Detection module include ultrasonic measuring unit, transient state ground wave measuring unit, Wei Chu
Manage device and field data server, the ultrasonic measuring unit, the transient state ground wave measuring unit and the field data
Server is connect with the microprocessor, and the monitoring center module includes a database server and a WEB server, described
Database server is connect with the WEB server, and the database server is connect with the field data server communication,
The WEB server is communicated to connect with several remote terminals.
2. partial discharge of switchgear as described in claim 1 monitors system, which is characterized in that the ultrasonic measuring unit packet
Include ultrasonic sensor, the first amplifying circuit, the first bandwidth-limited circuit, the first biasing circuit, the first FPGA data collector,
The first system power supply, the first display device and the first warning device, the ultrasonic sensor and first amplifying circuit electricity
Property connection, first amplifying circuit and first bandwidth-limited circuit and the first system power supply are electrically connected, described
First biasing circuit is electrically connected with the first FPGA data collector and the first system power supply, the first FPGA numbers
It is electrically connected according to collector and first display device, the first warning device and microprocessor.
3. partial discharge of switchgear as claimed in claim 2 monitors system, which is characterized in that the transient state electrical wave measurement it is single
Member includes TEV sensors, the second amplifying circuit, the second bandwidth-limited circuit, the second biasing circuit, the acquisition of the second FPGA data
Device, second system power supply, the second display device and the second warning device, the TEV sensors and second amplifying circuit electricity
Property connection, second amplifying circuit and second bandwidth-limited circuit and the second system power supply are electrically connected, described
Second biasing circuit is electrically connected with the second FPGA data collector and the second system power supply, the 2nd FPGA numbers
It is electrically connected according to collector and second display device, the second warning device and microprocessor.
4. partial discharge of switchgear as claimed in claim 3 monitors system, which is characterized in that first bandwidth-limited circuit
Including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first capacitance, the second capacitance,
Third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the first operational amplifier, second operational amplifier and third operation are put
Big device, described first resistor one end are connect with first amplifying circuit, the first resistor other end and the second resistance
One end and first capacitance one end connection, the one end of first capacitance far from the first resistor with it is described first transport
One end connection of the reverse input end of amplifier, the output end of first operational amplifier and the third capacitance is calculated, it is described
Positive input and second capacitance of the one end of second resistance far from the first resistor with first operational amplifier
One end connection, second capacitance the other end ground connection, the one end of the third capacitance far from first operation amplifier with
One end of the 3rd resistor and the connection of one end of the 4th capacitance, the other end and the 4th resistance of the 4th capacitance
One end and the second operational amplifier positive input connection, the 4th resistance the other end ground connection, the third
The one end of resistance far from the third capacitance and the second operational amplifier output end, the second operational amplifier it is reversed
One end of input terminal and the 5th capacitance connects, the other end of the 5th capacitance and one end of the 5th resistance and described
One end of 6th capacitance connects, the other end of the 6th capacitance and the positive input of the third operational amplifier and described
One end of 6th resistance connects, the other end ground connection of the 6th resistance, the 5th resistance far from the 5th capacitance one
End connects with the reverse input end of the third operational amplifier, the output end of third operational amplifier and first biasing circuit
It connects.
5. partial discharge of switchgear as claimed in claim 4 monitors system, which is characterized in that first biasing circuit includes
7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, four-operational amplifier, the first diode and
One end of two diodes, the 7th resistance is connect with first bandwidth-limited circuit, the other end of the 7th resistance with
The positive input of one end of the 8th resistance, one end of the tenth resistance and the four-operational amplifier connects, institute
State the other end ground connection of the 8th resistance, the one end and institute of the reverse input end of the four-operational amplifier with the 9th resistance
State eleventh resistor one end connection, the 9th resistance the other end ground connection, the other end of the eleventh resistor with it is described
The anode connection of the output end of four-operational amplifier, the cathode of first diode and second diode, described the
Altogether with the described one end of tenth resistance far from the 7th resistance, the cathode of second diode connects the anode of one diode
Ground.
6. partial discharge of switchgear as claimed in claim 5 monitors system, which is characterized in that second bandwidth-limited circuit
Including twelfth resistor, thirteenth resistor, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 7th electricity
Appearance, the 8th capacitance, the 9th capacitance, the tenth capacitance, the 11st capacitance, the 12nd capacitance, the 5th operational amplifier, the 6th operation are put
Big device and the 7th operational amplifier, described twelfth resistor one end are connect with second amplifying circuit, the twelfth resistor
The other end is connect with one end of one end of the thirteenth resistor and the 7th capacitance, and the 7th capacitance is far from the described tenth
One end of two resistance and the reverse input end of the 5th operational amplifier, the output end of the 5th operational amplifier and described
One end of 9th capacitance connects, the one end of the thirteenth resistor far from the twelfth resistor and the 5th operational amplifier
Positive input and the 8th capacitance one end connection, the other end ground connection of the 8th capacitance, the 9th capacitance is remote
One end from the 5th operational amplifier is connect with one end of one end of the 14th resistance and the tenth capacitance, described
The other end of tenth capacitance is connect with the positive input of one end of the 15th resistance and the 6th operational amplifier, institute
The other end ground connection of the 15th resistance is stated, the one end of the 14th resistance far from the 9th capacitance is put with the 6th operation
One end connection of big device output end, the reverse input end of the 6th operational amplifier and the 11st capacitance, the described tenth
The other end of one capacitance is connect with one end of one end of the 16th resistance and the 12nd capacitance, the 12nd capacitance
The other end connect with one end of the positive input of the 7th operational amplifier and the 17th resistance, the described 17th
The other end of resistance is grounded, the one end of the 16th resistance far from the 11st capacitance and the 7th operational amplifier
Reverse input end, the output end of the 7th operational amplifier and second biasing circuit connection.
7. partial discharge of switchgear as claimed in claim 6 monitors system, which is characterized in that second biasing circuit includes
18th resistance, the 19th resistance, the 20th resistance, the 21st resistance, the 22nd resistance, the 8th operational amplifier,
One end of three diodes and the 4th diode, the 18th resistance is connect with first bandwidth-limited circuit, and the described tenth
The other end of eight resistance and one end of the 19th resistance, one end of the 21st resistance and the 8th operation amplifier
The positive input of device connects, the other end ground connection of the 19th resistance, the reverse input end of the 8th operational amplifier
It is connect with one end of one end of the 20th resistance and the 22nd resistance, another termination of the 20th resistance
Ground, the other end of the 22nd resistance and the output end of the 8th operational amplifier, the cathode of the third diode
And the anode connection of the 4th diode, the anode of the third diode and the 21st resistance are far from the described tenth
Altogether, the cathode of the 4th diode is grounded for one end of eight resistance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810071659.4A CN108333485A (en) | 2018-01-25 | 2018-01-25 | A kind of partial discharge of switchgear monitoring system |
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| CN201810071659.4A CN108333485A (en) | 2018-01-25 | 2018-01-25 | A kind of partial discharge of switchgear monitoring system |
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Cited By (4)
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| CN109787095A (en) * | 2019-03-06 | 2019-05-21 | 四川赛康智能科技股份有限公司 | One kind being based on various dimensions characteristic parameter power switch cabinet state on_line monitoring device |
| CN109975761A (en) * | 2019-05-09 | 2019-07-05 | 国网湖北省电力有限公司黄石供电公司 | A kind of power equipment abnormal sound positioning device |
| CN110554285A (en) * | 2019-09-02 | 2019-12-10 | 中铁工程设计咨询集团有限公司 | self-adaptive environmental noise suppression partial discharge monitoring method |
| CN110763959A (en) * | 2019-09-24 | 2020-02-07 | 武汉汉源既济电力有限公司 | High-voltage switch cabinet partial discharge detection circuit and detection method thereof |
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| CN205193215U (en) * | 2015-12-01 | 2016-04-27 | 上海莫克电子技术有限公司 | Multi -functional partial discharge detector |
| CN106932690A (en) * | 2015-12-29 | 2017-07-07 | 吴文革 | Partial discharge of switchgear on-Line Monitor Device |
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