CN205091430U - Transformer internal discharge failure diagnosis device - Google Patents
Transformer internal discharge failure diagnosis device Download PDFInfo
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- CN205091430U CN205091430U CN201520842932.0U CN201520842932U CN205091430U CN 205091430 U CN205091430 U CN 205091430U CN 201520842932 U CN201520842932 U CN 201520842932U CN 205091430 U CN205091430 U CN 205091430U
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Abstract
The utility model provides a transformer internal discharge failure diagnosis device comprises with a plurality of real -time supervision working cell 1 fault data collector unit, 1 server, only through the internet access between the three, effectively reduces the interference through the electric isolation, and 1 fault data collector unit comprises 1 sound signal characteristics data acquisition terminal and 1 PC host computer, adopts radio communication between the two, and install on the transformer at signal characteristics data acquisition terminal, per 1 needs main change of monitoring to correspond 1 real -time supervision working cell, and 1 real -time supervision working cell comprises 1 discharge detection terminal and 1 PC host computer, adopts radio communication between the two, and discharge detection installs at the terminal on the transformer, all PC host computers pass through the network and are connected with the server. The utility model discloses can accurate carry out the discernment of internal discharge mode, carry out analysis processes according to the monitoring acoustical signal and accessible time discover the trouble.
Description
Technical field
The utility model relates to a kind of inside transformer discharge fault diagnostic device, belongs to transformer and controls servicing unit technical field.
Background technology
Power transformer plays the part of extremely important role in the continual and steady transmission of electric energy, and its reliability service and insulation status have direct relation.Inside transformer electric discharge is for transformer most common failure, and inside transformer electric discharge can cause insulation degradation, and internals work is not normal, and then causes transformer and depart from normal operating condition, even threatens to around power equipment, causes a series of a chain of accident.
Inside transformer discharge fault leaded joint scorification generation electric arc, go between to fuel tank or folder electric discharge, lead-in wire between or lead-in wire to multiple discharge modes such as other current potential body arc discharges, turn-to-turn electric discharge, interlayer electric discharge, phase fault electric discharge, spark discharge, solid insulation bubble-discharge, creeping discharge, floating potential discharges.Online accurately identify inside transformer discharge mode to Timeliness coverage power transformer interior fault hidden danger, to improve on-the-spot O&M overhaul efficiency significant.
Traditional inside transformer discharge test device is difficult to real-time and the monitoring result accuracy of taking into account observation process simultaneously, and, be difficult to the quick identification realizing inside transformer discharge mode.
Utility model content
The purpose of this utility model is to provide a kind of inside transformer discharge fault diagnostic device, by accurate, stability monitoring inside transformer discharging sound signal, accurately carry out the identification of internal discharge pattern, carrying out analyzing and processing according to monitoring acoustical signal can Timeliness coverage fault, effectively avoids the interference in electric field in external environment, magnetic field simultaneously.
The utility model is realized by following technical proposals.A kind of inside transformer discharge fault diagnostic device, be made up of 1 fault data collection unit, 1 station server and several Real-Time Monitoring working cells, connect by means of only network between three, effectively reduce interference by electrical isolation, wherein Real-Time Monitoring working cell quantity is equal with monitored main transformer quantity.1 fault data collection unit is made up of 1 acoustical signal characteristic acquisition terminal and 1 PC host computer, and adopt radio communication between the two, acoustical signal characteristic acquisition terminal is installed on transformer, and PC host computer is arranged in communication effective range; Number of servers is 1, is arranged in the arbitrary site of equipment O&M department; Corresponding 1 the Real-Time Monitoring working cell of main transformer need be monitored for every 1,1 Real-Time Monitoring working cell is made up of 1 discharge examination terminal and 1 PC host computer, adopt radio communication between the two, discharge examination terminal is installed on transformer, and PC host computer is arranged in communication effective range; All PC host computers are connected with server by network; Described server, has two input ends and an output terminal; First input end receives the information that fault collector unit is uploaded; Second input end then receives the singularity exponents of the discharging sound signal of Real-Time Monitoring unit input; Server output terminal connects Real-Time Monitoring unit.
Particularly, described server, has two input ends and an output terminal.First input end receives the information such as singularity exponents, discharge mode, discharge time of the discharging sound signal that fault collector unit is uploaded, and sets up acoustical signal property data base according to this; Second input end then receives the singularity exponents of the discharging sound signal of Real-Time Monitoring unit input, and the data in itself and database is contrasted, and judges whether singularity exponents is fault discharge, and discharge fault pattern; Differentiation situation is fed back to Real-Time Monitoring unit via output terminal by server.
Fault data collection unit is collected generation internal discharge failure transformer discharging sound signal, extract the signal waveform singularity exponents under different discharge patterns, and transmission is stored into server; Set up acoustic signal property data base in server, the discharging sound signal singularity sex index extract fault data collection unit and Real-Time Monitoring unit and discharge mode, discharge parameter carries out recording, classifies, retrieves, compares; Real-Time Monitoring working cell is then monitored operating transformer, real-time testing analyzes discharging sound signal waveform, and the singularity exponents of extraction is sent to acoustic signal property data base in server and contrasts, display feedback result, and localization of fault is carried out to the fault discharge judged and starts sound and light alarm.
Further, described fault data collection unit is made up of sensor, analog filter, ADC converter, read-write memory, communication port circuit, PC host computer, power circuit.The external power supply of input is converted to the voltage for different brackets needed for parts such as sensor, read-write memory, display screens by power circuit, and sensor, analog filter, ADC converter, read-write memory, communication port circuit are powered; Sensor input is connected with known fault transformer, and detect inside transformer discharging sound signal, output terminal is connected with analog filter input end; Analog filter input end is connected with sensor output, and by the discharging sound signal elimination ground unrest detected, its output terminal is connected with ADC switch input; It is digital signal that filtered discharging sound signal is carried out AD conversion by ADC converter, and its output terminal is connected with read-write memory input end; Digital signal is carried out wireless telecommunications via communication port and PC host computer by read-write memory, numerical information is uploaded to PC host computer and carries out waveform processing, extracts the singularity exponents of fault waveform; PC host computer is connected with server, and is uploaded onto the server by the singularity exponents of dissimilar internal discharge acoustical signal.
Further, described Real-Time Monitoring unit, is made up of discharge examination terminal and PC host computer.Real-Time Monitoring unit is monitored in real time, online to waveform and is extracted the singularity exponents of acoustical signal, singularity exponents is uploaded onto the server and carries out contrast and discharge mode differentiates, after being judged to be internal discharge, discharge fault positioned and shows in discharge examination terminal, starting sound and light alarm simultaneously.Its composition is as follows with specific features:
(1) discharge examination terminal is made up of 3 groups of sounding modules, 4 groups of sensors, analog filter, ADC converter, read-write memory, communication port circuit, data interpretation circuitry, display screen, power circuit, battery, charging inlets.Often organize sounding module and respectively place same position with 1 group of sensor.
Further, discharge examination terminal can adopt powered battery and external power source two kinds of powering modes for the length of monitoring time needed for monitoring transformer reality.For the transformer needing long-term on-line monitoring, discharge examination terminal is fixed on the transformer for a long time, adopts external power supply to power, by the direct input power circuit of external power supply; For situations such as monitoring, walkaround inspection, diagnostic tests in short-term, adopt powered battery, discharge examination terminal abuts in and transformer case carries out discharging sound signal monitoring and discharge mode differentiates by technician in short-term.Charging port charges to battery by external power source access, battery output access power circuit.Power circuit is changed voltage, exports as the voltage for the different brackets needed for the parts such as sensor, read-write memory, display screen after conversion.
When running by monitoring transformer, 4 groups of sensor input are connected with by monitoring transformer, and detect inside transformer discharging sound signal, output terminal is connected with analog filter input end; Analog filter input end is connected with sensor output, and by the discharging sound signal of detection according to required frequency range filtering, its output terminal is connected with ADC switch input; It is digital signal that filtered discharging sound signal is carried out AD conversion by ADC converter, and its output terminal is connected with read-write memory first input end; Read-write memory first input end is connected with ADC converter output end, its second input end, the first output terminal are connected with communication port respectively, for carrying out wireless telecommunications with host computer, its second output terminal is connected with 3 groups of sounding modules, 3rd output terminal is connected with sound light alarming circuit, and the 4th output terminal is connected with data interpretation circuitry; PC host computer processes the shape information that communication port is uploaded, extract the singularity exponents of waveform and record the different initial time that 4 groups of sensors detect acoustical signal, afterwards second input end of the singularity exponents of acquisition by server is uploaded onto the server, and the data in itself and database are contrasted, judge whether singularity exponents is fault discharge; The output terminal feedback result of PC host computer reception server, and perform different instructions according to feedback result.
When the singularity exponents obtained is not fault discharge, PC host computer instruction discharge examination terminal continues to detect follow-up waveform; When the singularity exponents obtained is fault discharge, then PC host computer continues to be connected with server, identification record discharge mode, and sends instruction via communication port circuit to read-write memory, and read-write memory second output terminal outputs signal 3 groups of sounding modules; Often organize sounding module and respectively place same position with 1 group of sensor, each group sounding module sends acoustic signals, and 4 groups of sensors will record waveform initial time parameter respectively and transfer to PC host computer, and PC host computer calculates the relative position of acquisition 4 groups of sensors; PC host computer calculates relative position between fault discharge o'clock to 4 groups of sensors according to the mistiming initially recording internal fault discharging sound signal and arrive 4 groups of sensors afterwards, completes localization of fault; Fault discharge pattern and localization of fault information are sent to read-write memory via communication port circuit by PC host computer; Read-write memory sends a signal to sound light alarming circuit via the 3rd output terminal, and sound light alarming circuit starts, and prompting exists internal discharge; Read while write storer, via data interpretation circuitry, discharge mode information and localization of fault information are sent to display screen.
The utility model has the advantages that:
(1) differentiate it is carry out based on the singularity exponents of discharging sound signal to inside transformer discharge mode, judge to have uniqueness to discharge mode, discrimination precision is high; Differentiate according to acoustical signal, effectively avoid the interference in electric field in external environment, magnetic field.
(2) inside transformer discharge fault diagnostic device is made up of fault data collection unit, server, Real-Time Monitoring working cell, connects, effectively realize electrical isolation, can reduce interference between three by means of only network.
(3) in Real-Time Monitoring working cell, discharge examination terminal is provided with external power supply pattern and battery powered mode, can for long-term on-line monitoring or the different working modes selection powering mode of patrolling and examining test in short-term, and test mode is flexible.
(4) be determined by sounding module to the location of the initial relative position of 4 sensors, do not need to use electric signal, effectively avoid the electrical Interference that in running, transformer produces.
(5) owing to there being sounding module to position sensor initial position, in equipment routing inspection or electric discharge terminal installation in, can arrange the position of sensor by demand, the flexibility ratio of significant increase equipment use, installation, ensures the accuracy of localization of fault simultaneously.
(6) after the localization of fault of internal discharge via 4 sensors, related position information can show on a display screen by two-dimensional/three-dimensional figure after PC process, makes the locus display of internal fault more directly perceived, is convenient to operation maintenance personnel specific aim and carries out maintenance.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is hardware unit schematic diagram of the present utility model.
Name corresponding to Reference numeral is called:
1-fault data collection unit, 2-server, 3-Real-Time Monitoring working cell, 101-acoustical signal characteristic acquisition terminal, 102-PC host computer 1(fault data collection unit), 301-discharge examination terminal, 302-PC host computer 2(Real-Time Monitoring working cell), 110-sensor 1, 111-analog filter 1, 112-ADC converter 1, 113-read-write memory 1, 114-communication port circuit 1, 115-power circuit 1, 310-sounding module 1, 311-sounding module 2, 326-sounding module 3, 312-sensor 2, 313-sensor 3, 314-sensor 4, 325-sensor 3, 315-analog filter 2, 316-ADC converter 2, 317-read-write memory 2, 318-communication port circuit 2, 319-power circuit 2, 320-sound light alarming circuit, 321-data interpretation circuitry, 322-display screen, 323-battery, 324-charging port.
Embodiment
As shown in Figure 1, a kind of inside transformer discharge fault diagnostic device, is made up of a fault data collection unit 1, station server 2 and several Real-Time Monitoring working cells 3.Wherein require need arrange a Real-Time Monitoring working cell at each main transformer to be monitored, namely cover N platform main transformer to be monitored and need configure the above equipment in N number of Real-Time Monitoring working cell and can form an inside transformer discharge fault diagnostic device.Device is specifically composed as follows:
1, fault data collection unit 1 is made up of acoustical signal characteristic acquisition terminal 101 and PC host computer-1102, and acoustical signal characteristic acquisition terminal 101 is installed on transformer, and host computer-1102 is arranged in communication effective range.Both exchange information by wireless telecommunications.
PC host computer-1102 requires that basic configuration is for being provided with wireless communication module, is provided with Matlab software and has the program calculating singularity exponents.
Acoustical signal characteristic acquisition terminal 101 is by sensor-1110, and analog filter-1111, ADC converter-1112, read-write memory-1113, communication port circuit-1114, power circuit-1115 forms.Wherein sensor-1110 is arranged on known fault transformer, input end is close to transformer surface, output terminal is connected with analog filter-1111 input end, sensor can select the ULT2000 series of Lancetec company and the PD series sensor of POWER company, for ULT2019(V), sensitivity 500Mv/g, frequency range 0.7-10000HZ, there is Low ESR export, anti-interference, moisture resistant, anti-harmful gas, can the advantage such as long cable transmission; Analog filter-1111 output terminal is connected with ADC converter-1112 input end, because inside transformer electric discharge audio signal is generally less than 1000HZ, analog filter-1111 is for the signal of elimination high band, analog filter-1111 can select Bessel filter, there is less time delay characteristic, be applicable to transmit impulse type waveform signal; ADC converter-1112 output terminal is connected with read-write memory-1113, ADC converter-1112 inputs to read-write memory process for simulating signal being converted to digital quantity, ADC converter-1112 can select 12 ADC574 parallel converters or 8 ADC0832 serial convertors, for ADC574, its slewing rate is 25 μ s, conversion accuracy 0.05%, can be widely used in data collector.Read-write memory-1113, for storing and reading data, its output terminal is connected with communication port circuit-1114 input end, and read-write memory has multiple choices, the RAM storer of the μ PD41256 that the MCM6264 that MOTOROLA company such as can be selected to produce or NEC Corporation produce.The mode of data in read-write memory-1113 by wireless transmission is connected with PC host computer-1102 by communication port circuit-1114, wherein communication port circuit-1114 built-in communication interface and wireless transport module, such as, RS232 communication interface and remote RS232 wireless serial module (POP2033) can be selected, emissive power 1W, sighting distance transmitting distance can reach 1000-4000 rice, can meet the communication need between acoustical signal characteristic acquisition terminal 101 and PC host computer-1102.Power circuit-1115 input end is connected with external power source, built-in rectification circuit and DC/DC modular converter, generally can select the DC/DC series modular converter of WISPOWER, its output terminal respectively with sensor-1110, analog filter-1111, ADC converter-1112, read-write memory-1113, communication port circuit-1114 is connected and provides the operating voltage of its needs.
2, server 2 receives the singularity exponents of the internal fault discharge waveform that fault data collection unit 1 is uploaded, discharge mode and other information, server 2 receives the waveform signal singularity exponents that Real-Time Monitoring working cell 3 inputs simultaneously, and carry out with the database on server 2 contrasting, retrieving, and feedback information is to Real-Time Monitoring working cell 3.Server 2 all adopts cable network to be connected with the PC host computer-1 in fault data collection unit 1, the PC host computer-2 in Real-Time Monitoring working cell 3, therefore server 2 can be arranged on according to situation the arbitrary site that intra-company has network connection.
Server 2, be to provide the equipment of calculation services, its formation comprises processor, hard disk, internal memory, device bus etc., and general computer architecture is similar, but requires higher in processing power, stability, reliability, security, extensibility, manageability etc.In the present invention, IBMSystemx3800 database server can be selected in server 2 hardware configuration aspect; The softwares such as software merit rating aspect need be provided with MySQL database, Linux operating means, apache web server, PHP server side scripts interpreter.
3, Real-Time Monitoring working cell 3, is made up of discharge examination terminal 301 and PC host computer-2302.Real-Time Monitoring unit is monitored in real time, online to waveform and is extracted the singularity exponents of acoustical signal, singularity exponents is uploaded onto the server and carries out contrast and discharge mode differentiates, after being judged to be internal discharge, discharge fault positioned and shows in discharge examination terminal, starting sound and light alarm simultaneously.Be implemented as follows:
PC host computer-1102 requires that basic configuration is for being provided with wireless communication module, is provided with Matlab software and has to calculate the program of singularity exponents and the calculation procedure of localization of fault.
Discharge examination terminal 3 by sounding module-1310, sounding module-2311, sounding module-3326, sensor-2312, sensor-3313, sensor-4314, sensor-5325, analog filter-2315, ADC converter-2316, read-write memory-2317, communication port circuit-2318, power circuit-2319, sound light alarming circuit 320, data interpretation circuitry 321, display screen 322, battery 323, charging port 324 forms.
When running by monitoring transformer, sensor-2312, sensor-3313, sensor-4314, sensor-5325 are installed in by monitoring transformer, input end is close to transformer surface, output terminal is all connected with the input end of analog filter-2315, and sensor can select the ULT2000 series of Lancetec company and the PD series of POWER company equally, simultaneously, transformer is provided with two groups of sounding modules, wherein sounding module-1311 and sensor-2312 are arranged in same position, sounding module-2310 and sensor-3313 are arranged in same position, sounding module-2326 and sensor-3325 are arranged in same position, localization of fault after determining for fault, sounding module-1311, sounding module-2310, sounding module-3326 output terminal is close to transformer surface, input end is connected with the second output terminal of read-write memory-2, the built-in sounding control element of sounding module, loudspeaker, generally can choose MSP430G2533 and control audible frequency as control element, MSP430G2533 has the feature of ultralow Power supply and super low-power consumption.Sensor output is all connected with analog filter-2315 input end, analog filter-2315 carries out filtering according to required frequency range, can the Bessel filter of time delay characteristic of selection of small, analog filter-2315 output terminal is connected with ADC converter-2316 input end.Simulating signal is converted to digital signal by ADC converter-2316, and its output terminal is connected with read-write memory-2317 first input end, can select 12 ADC574 parallel converters.Its first input end of read-write memory-2317 is connected with ADC converter-2316 output terminal, its second input end, the first output terminal are connected with communication port circuit-2318 respectively, for carrying out wireless telecommunications with host computer, its second output terminal is connected with 3 groups of sounding modules, 3rd output terminal is connected with sound light alarming circuit 320,4th output terminal is connected with data interpretation circuitry 321, the MCM6264 that read-write memory-2317 can select MOTOROLA company to produce; Communication port circuit-2318 built-in communication interface and wireless transport module, can select RS232 communication interface and remote RS232 wireless serial module (POP2033).
Acoustical signal by monitoring transformer is wirelessly transmitted to PC host computer-2 with analog to digital conversion by communication port circuit-2318 after filtering, the calculating of singularity exponents is carried out via the program in PC host computer-2, acoustical signal property data base result uploaded onto the server after having calculated in 2 is compared, according to comparison result, PC host computer-2 pairs of discharge examination terminals assign different instructions.
If calculate singularity exponents and acoustical signal property data base in whole singularity exponents all unequal, comparing result feeds back to PC host computer-2, judge there is not internal discharge fault by monitoring transformer, PC host computer-2 sends instruction to read-write memory-2317, continues to monitor inside transformer acoustical signal.
Claims (2)
1. an inside transformer discharge fault diagnostic device, it is characterized in that: be made up of 1 fault data collection unit, 1 station server and several Real-Time Monitoring working cells, connect by means of only network between three, and electrical isolation, wherein Real-Time Monitoring working cell quantity is equal with monitored main transformer quantity; 1 fault data collection unit is made up of 1 acoustical signal characteristic acquisition terminal and 1 PC host computer, and adopt radio communication between the two, acoustical signal characteristic acquisition terminal is installed on transformer, and PC host computer is arranged in communication effective range; Number of servers is 1, is arranged in the arbitrary site of equipment O&M department; Corresponding 1 the Real-Time Monitoring working cell of main transformer need be monitored for every 1,1 Real-Time Monitoring working cell is made up of 1 discharge examination terminal and 1 PC host computer, adopt radio communication between the two, discharge examination terminal is installed on transformer, and PC host computer is arranged in communication effective range; All PC host computers are connected with server by network; Described server, has two input ends and an output terminal; First input end receives the information that fault collector unit is uploaded; Second input end then receives the singularity exponents of the discharging sound signal of Real-Time Monitoring unit input; Server output terminal connects Real-Time Monitoring unit.
2. inside transformer discharge fault diagnostic device according to claim 1, it is characterized in that: described fault data collection unit is made up of sensor, analog filter, ADC converter, read-write memory, communication port circuit, PC host computer, power circuit, power circuit is sensor, analog filter, ADC converter, read-write memory, communication port circuit are powered; Sensor input is connected with known fault transformer, and output terminal is connected with analog filter input end; Analog filter input end is connected with sensor output, and its output terminal is connected with ADC switch input; The output terminal of ADC converter is connected with read-write memory input end; Digital signal is carried out wireless telecommunications via communication port and PC host computer by read-write memory, and PC host computer is connected with server.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841877A (en) * | 2017-03-28 | 2017-06-13 | 海南电网有限责任公司 | Transformer hidden danger on-line monitoring method based on travelling wave current |
| CN108919065A (en) * | 2018-05-16 | 2018-11-30 | 国网浙江省电力有限公司电力科学研究院 | GIS ultrahigh frequency partial discharge monitoring management system |
| CN110888030A (en) * | 2019-11-26 | 2020-03-17 | 深圳供电局有限公司 | Short air gap discharge identification circuit, method and system of transformer |
| CN112131035A (en) * | 2020-09-29 | 2020-12-25 | 河北科技师范学院 | Self-service computer troubleshooting system |
-
2015
- 2015-10-28 CN CN201520842932.0U patent/CN205091430U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841877A (en) * | 2017-03-28 | 2017-06-13 | 海南电网有限责任公司 | Transformer hidden danger on-line monitoring method based on travelling wave current |
| CN108919065A (en) * | 2018-05-16 | 2018-11-30 | 国网浙江省电力有限公司电力科学研究院 | GIS ultrahigh frequency partial discharge monitoring management system |
| CN110888030A (en) * | 2019-11-26 | 2020-03-17 | 深圳供电局有限公司 | Short air gap discharge identification circuit, method and system of transformer |
| CN112131035A (en) * | 2020-09-29 | 2020-12-25 | 河北科技师范学院 | Self-service computer troubleshooting system |
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