CN203259586U - Current on-line monitoring integrated system of on-load tap-changer - Google Patents
Current on-line monitoring integrated system of on-load tap-changer Download PDFInfo
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- CN203259586U CN203259586U CN 201320168107 CN201320168107U CN203259586U CN 203259586 U CN203259586 U CN 203259586U CN 201320168107 CN201320168107 CN 201320168107 CN 201320168107 U CN201320168107 U CN 201320168107U CN 203259586 U CN203259586 U CN 203259586U
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Abstract
The utility model relates to a current on-line monitoring integrated system of an on-load tap-changer. The current on-line monitoring integrated system comprises a current acquisition device, a receiving device and a terminal machine. The current on-line monitoring integrated system is characterized in that the current acquisition device is fixed beside the on-load tap-changer, the receiving device is arranged beside a control room, the current acquisition device is connected with the receiving device through an optical fiber, and the receiving device is connected with the terminal machine through a converting station network; and the current acquisition device carries out an insulation process at the electrical high and low voltage sides through the optical fiber and transmits optical digital signals to the receiving device, the received primary current waveform data is framed to be sent to the converting station network by the receiving device, and analogue signals for output are provided by the receiving device. The primary current work waveform of the on-load tap changer is monitored in an on-line and real-time manner, so that the running state of the on-load tap changer can be effectively monitored, and electrical failures and mechanical failures of the on-load tap changer are diagnosed in real time; and the system sends out an alarm if the on-load tap changer breaks down.
Description
Technical field
The utility model relates to a kind of on-load tap changers of transformers monitoring device, and the load ratio bridging switch switch current is carried out on-line monitoring.Belong to the electric device technical field.
Background technology
ULTC, it is very important equipment for power transmission and distribution in the power system transformer substation, it is by on-load tap changer (On-load Tap Changer, OLTC) step by step action, in the situation that does not have outage, carry out the voltage adjustment, realization makes the system voltage of industrial power supply and resident power supply keep stable to the on-load voltage regulation of high pressure power transmission and distribution electrical network.This adjusting pressure measure, range of regulation is large, small investment is effective, range of regulation be generally 15% and more than.Pressure regulation speed is fast, and simultaneously adjustable at any time again, shunting switch can manually be controlled, and also can control by remote auto, convenient realization robotization.ULTC has been brought into play the contact electrical network, has been regulated vital role meritorious and reactive power flow and steady load center voltage in electric system, in electrical network, obtained using further widely, usually all carried out on-load voltage regulation on the high voltage power transmission transformer and on the substation transformer of important load.
Load ratio bridging switch is movable member unique in the ULTC, also is one of critical component.The workmanship of load ratio bridging switch and operation, service technique level are directly connected to the security of operation of ULTC.Along with ULTC the increasing of power grid application, the fault of load ratio bridging switch is also increasing.Therefore, in view of having, load ratio bridging switch acts frequently and the high characteristics of failure rate, the Condition Monitoring Technology of research OLTC is to realize rationalization, the standardization, scientific of maintenance of equipment, adapt to the national economic development to the new situations of electric power high-quality, high reliability request, be of great practical significance.
For the operating maintenance technology of OLTC, still mainly adopt at present the periodic maintenance mode of off-line both at home and abroad, the application in production reality of on-line monitoring and diagnostic system is also very rare.In the academic research field, the on-line monitoring and fault diagonosing technical research of OLTC is started in the nineties in 20th century, and is existing still in the middle of development.Up to now, adopt integrated design to be installed on the achievement in research of the on-line monitoring system of OLTC inside, not yet be seen in bibliographical information.
According to present application experience and experimental studies results, the physical quantity that is used for sign OTLC running status comprises that voltage waveform, electromagnetic radio-frequency, oil chromatography are analyzed etc. between the mechanical vibration of switch motion generation, the drive motor anglec of rotation, drive motor electric current, motor drive mechanism load torque, Switch main body thermonoise, switching contact.Common are the on-load shunting switch fault detection method has:
1, vibration event detects:
Be accompanied by a series of vibration event in the OTLC blocked operation process, wherein contain abundant machine performance information and vibration fingerprint, therefore be the important means of OTLC condition monitoring and fault diagnosis to analysis and the processing of vibration signal, such as patent " 201210285730.1 1 kinds of load ratio bridging switch viberation detectors " and " Vibration-Measuring Systems of 201120071054.9 1 kinds of on-load tap changers of transformers " but vibration signal can roll in the air, reflex, and its velocity of propagation of the vibration signal of different frequency is also different, so the vibration signal that actual monitoring arrives may be own through distorted.Different field ambient vibration situation is different, and there is larger difference in its detection, is not easy to statistical law and research algorithm.
2, contact temperature detects:
The many faults of OLTC show as the local overheating phenomenon, as switch close close not in place or contact bad, contact resistance is increased, contact temperature sharply raises, and forms vicious cycle so that causes catastrophic failure.Directly measure for contact temperature, utilize the fiber-optical grating temperature sensor thermometric, the employing light signal is measured and is transmitted, and finishes the measurement to temperature, also realizes the electrical isolation that detects.Monitor the electric shock temperature such as patent " the 200920230767.8 load tap changer contact trouble-shooter based on the optical fiber grating temperature measurement " with grating technology.This scheme is monitor temperature directly, but generally is that contact is out of order, and fever phenomenon could judge accurately that its fault detect is not very timely when obvious.
3, mechanical property monitoring:
Gather load ratio bridging switch mechanical oscillation signal, rotating speed of transmission shaft signal, drive motor current signal etc., comprehensively judge according to image data, thereby judge the mechanical fault of load ratio bridging switch, such as patent " 201110286384.4 power transformer load tap changer mechanical property on-Line Monitor Device ".This mode can be found the load ratio bridging switch mechanical fault more in time, but only limits to the mechanical fault of load ratio bridging switch characteristics is monitored, can not the detection contact contact etc. electric fault.This mode can not be carried out comprehensive monitoring to analyze the load ratio bridging switch running status.
4, generalized variable monitoring:
To comprehensive monitoring data analysis such as the mechanical property of load ratio bridging switch, vibrant characteristic, control motor working current waveforms, such as patent " 201120228933.8 on-load tap changers of transformers intelligent online monitoring device ".But the monitoring of each above-mentioned variable all is the external monitoring of transformer, adopts the non-invasi measurement technology, for the difficult judgement of failure ratio of the electric aspect of load ratio bridging switch.
In the actual moving process, the fault of load ratio bridging switch is more, and failure cause is complicated.As the movable member that moves under the high-voltage large current unique in the ULTC, change-over switch contact duty is directly reacted load ratio bridging switch ruuning situation.When contact resistance increases, in the switching over process since switch current be several times of running current to decades of times, can cause local overheating, cause scaling loss.And in the above-mentioned failure detection schemes, directly do not detect for change-over switch contact duty, detection method 2 can not directly reflect the duty of contact for the measurement of contact temperature.The mode of detection method 1,3,4 measurement belongs to indirect measurement, can only diagnose for specific mechanical fault state, can not promptly and accurately identify the contact abnormal operating state of load ratio bridging switch.
Summary of the invention
The purpose of this utility model is in order to overcome accurately and effectively Real-Time Monitoring load ratio bridging switch dynamic process electric current of existing monitoring scheme, and the defective of carrying out fault diagnosis and accurate early warning, provide a kind of load ratio bridging switch online current monitoring integral system, current collecting device is installed in load ratio bridging switch inside, can monitor its switch current waveform by direct-on-line, and record to diagnose working condition and the mechanical part duty of load tap changer contact by current waveform, the source of trouble in the failure judgement situation is for its maintenance provides on-the-spot service data with improvement.
The technical solution of the utility model is:
Load ratio bridging switch electric current on-line monitoring integral system, comprise current collecting device, receiving trap, terminating machine, it is characterized in that: current collecting device is fixed in the load ratio bridging switch side, receiving trap is installed on the pulpit side, current collecting device links to each other with receiving trap by optical fiber, and receiving trap links to each other with terminating machine by transformer station's network; Described current collecting device carries out electric high and low pressure side insulation by optical fiber, and the transmission light digital signal is to receiving trap simultaneously, and described receiving trap sends to transformer station's network with the primary current Wave data framing that receives, and analog signal output is provided simultaneously.
Described current collecting device forms by primary module with from module, primary module comprise get can circuit, getting can CT, current detecting CT, signal processing circuit, electro-optical conversion circuit, comprises from module that get can CT, current detecting CT; Getting of primary module can CT and can link to each other by circuit with getting of primary module respectively by CT from getting of module, the current detecting CT of primary module with after current detecting CT from module links to each other with the signal processing circuit of primary module respectively by electro-optical conversion circuit output, cooperate primary module to get to guarantee the continuity of powering from module; Deliver to primary module from the current measurement signal of module and process, primary module carries out serial code to current signal data, the self check data of circuit 1 and circuit 2, sends to receiving trap by an optical fiber.
The getting of described current collecting device can adopt circuit primary module, from module CT complementation get can mode as the harvester power supply, wherein get and to adopt ferromagnetic formula CT by CT, the getting of design can circuit obtain simultaneously change-over switch circuit A1 get can CT1 and circuit A2 get can the CT2 signal, can the output of CT secondary carry out conversion to getting, obtain DC voltage; Simultaneously, get and be designed with energy-storage units in can circuit and carry out energy storage.
The input CT1 of described current collecting device and input CT2 all adopt hollow coil current transformer, and signal processing circuit is with integrator, and integration is carried out in output to the air core coil mutual inductor, reduction primary current waveform.
Described receiving trap comprises photoelectric switching circuit, microprocessor, multichannel D/A translation circuit, network interface chip, the photoelectric switching circuit input end links to each other with the electro-optical conversion circuit output terminal of current collecting device by optical fiber, the photoelectric switching circuit output terminal links to each other with microprocessor, microprocessor links to each other with multichannel D/A translation circuit, network interface chip respectively, microprocessor carries out framing with each road current waveform data of Real-Time Monitoring according to the IEC61850 communications protocol and sends, and is connected to transformer station's network by Ethernet; Simultaneously, the microprocessor of receiving trap to each road Wave data carry out D the A conversion, analog output is provided.
The described terminating machine factually change-over switch current waveform of time monitoring carries out fault diagnosis and early warning to load ratio bridging switch; The messaging software of terminating machine installation comprises running current waveform and fail operation waveform database, judges duty, timely fault diagnosis and the processing of reporting to the police of system according to corresponding data fitting algorithm.Set up simultaneously load ratio bridging switch switching waveform data database, record each switch current waveform.
Current collecting device directly gathers the real-time dynamic current waveform of change-over switch contact in the load ratio bridging switch, monitoring according to the change-over switch current waveform, can on-line real time monitoring change-over switch duty, and diagnose change-over switch contact situation and mechanical part ruuning situation according to current waveform, electric fault and the mechanical fault of timely early warning load ratio bridging switch, the source of trouble in the failure judgement situation is for reasonable maintenance and the follow-up improvement of load ratio bridging switch provides real-time on-the-spot service data.
Terminating machine receives the IEC61850 packet, restores Wave data, carries out corresponding data and processes.Its function that mainly realizes has:
● fault diagnosis: software is analyzed the storehouse with the switch current comparison of wave shape, according to relevant mathematics fitting algorithm, the current waveform of Real-Time Monitoring is carried out intellectual analysis and calculating, judges the load ratio bridging switch duty, prediction latency fault, and pre-alarm is notified.
● the online monitoring data storehouse: set up current waveform database and Fault Diagnosis Database, the later stage can enquiry of historical data, so that the fault later stage is analyzed the load ratio bridging switch Trouble cause better.
● online self diagnosis: by to harvester self check data, receiving trap self check data analysis, realize the online self-diagnostic function of harvester and receiving trap, guarantee the reliability of system.
● reporting system: can be according to the automatic information generated form of default mode, the user can easily edit form.
● telecommunication: by public communication network regularly or receive in real time, check the load ratio bridging switch online monitoring data.
● information sharing: a plurality of user terminals can obtain corresponding information according to its authority.
Load ratio bridging switch on-line monitoring integral system of the present utility model has self-checking function, harvester sends to receiving trap with self check information, receiving trap sends to transformer station's Ethernet with self self check information and harvester self check information framing, the terminating machine messaging software is analyzed according to self check information, automatically identifies load ratio bridging switch electric current on-line monitoring integral system faults itself and sends warning.
Description of drawings
Fig. 1 is load ratio bridging switch current collecting device installation site synoptic diagram, wherein among the figure: the 1-transformer tapping, 2-change-over switch electric current on-line monitoring point 1,3-change-over switch electric current on-line monitoring point 2,4-load ratio bridging switch change-over switch, select part on the 5-selector switch, select part under the 6-selector switch.
Fig. 2 is load ratio bridging switch switching instant change-over switch A1, A2 line current oscillogram
Fig. 3 is load ratio bridging switch electric current on-line monitoring integral system schematic diagram, wherein among the figure: 7-change-over switch circuit A1,8-input CT1,9-gets energy CT1,10-change-over switch circuit A2,11-input CT2,12-gets energy CT2,13-gets energy circuit, 14-signal processing circuit, 15-electro-optical conversion circuit, 16-remote transmission optical fiber, the 17-photoelectric switching circuit, the 18-microprocessor, 19-multichannel D the A conversion, the proportional current waveform signal output of 20-, 21-Ethernet interface conversion chip, the output of 22-Ethernet, 23-transformer station Ethernet, the 24-terminating machine, 25-A phase acquisition device primary module, 26-A phase acquisition device be from module, the 27-receiving trap.
Fig. 4 is load ratio bridging switch electric current on-line monitoring integral system block diagram, wherein among the figure: 28-A phase selectors, 29-B phase selectors, 30-C phase selectors, 31-B phase acquisition device be from module, 32-B phase acquisition device primary module, 33-C phase acquisition device is from module, 34-C phase acquisition device primary module.
Fig. 5 is that loaded tap-off is opened electric current on-line monitoring receiving trap schematic block circuit diagram.
Embodiment
The utility model will be further described by reference to the accompanying drawings.
Load ratio bridging switch electric current on-line monitoring integral system is mainly used in the monitoring of change-over switch electric current in the shunting switch.The current monitoring synoptic diagram as shown in Figure 1, select to select under part 5, the selector switch part 6 in the no current situation, to select the connection of transformer tapping on the selector switch, change-over switch 4 has current switching, is connected the connection of A, B, the output of C three-phase line and the transformer tapping of being connected with change-over switch by selector switch.Mutually as example, circuit A1 connects selection part 6 under change-over switch contact and the selector switch take A, and circuit A2 connects selection part 5 on change-over switch contact and the selector switch.Because change-over switch is to carry out change action under high-voltage large current, failure rate is higher comparatively speaking, therefore by the electric current of monitoring change-over switch circuit A1 and A2, can reflect change-over switch contact connection status and selector switch duty.The current monitoring waveform is analyzed and is processed and calculate by circuit A1, A2 dynamic current shape information as shown in Figure 2, judges the load ratio bridging switch failure condition, and makes subsequent treatment.
The current monitoring system theory diagram as shown in Figure 3, load ratio bridging switch electric current on-line monitoring integral system, comprise current collecting device, receiving trap 27, terminating machine 24, current collecting device is fixed in the load ratio bridging switch side, receiving trap 27 is installed on the pulpit side, current collecting device links to each other with receiving trap 27 by optical fiber, and receiving trap 27 links to each other with terminating machine 24 by transformer station's network; Described current collecting device carries out electric high and low pressure side insulation by optical fiber, and the transmission light digital signal is to receiving trap simultaneously, and described receiving trap sends to transformer station's network with the primary current Wave data framing that receives, and analog signal output is provided simultaneously.Described current collecting device forms by primary module 25 with from module 26, primary module comprise get can circuit, getting can CT, current detecting CT, signal processing circuit, electro-optical conversion circuit, comprises from module that get can CT, current detecting CT; Getting of primary module 25 can CT and can link to each other by circuit with getting of primary module respectively by CT from getting of module 26, the current detecting CT of primary module 25 with after current detecting CT from module 26 links to each other with the signal processing circuit of primary module 25 respectively by electro-optical conversion circuit output, cooperate primary modules 25 to get to guarantee the continuity of powering from module 26; Deliver to primary module 25 from the current measurement signal of module 26 and process, current signal data, the self check data of 25 pairs of circuits 1 of primary module and circuit 2 are carried out serial code, send to receiving trap 27 by an optical fiber.Adopt air core coil induction primary current, signal processing circuit 14 arrives OK range with output 8,10 conditionings of air core coil, and through the laggard row digital signal processing of analog to digital conversion, the digital signal after then will processing by electro-optical conversion circuit 15 is converted to light signal; Load ratio bridging switch high pressure side-draw can be got energy from primary current by CT (9,12), can be converted to direct-flow voltage regulation source by circuit 13 by getting, and gives signal processing circuit 14 and electro-optical conversion circuit 15 power supplies.Optical fiber 16 is connected with on-load shunting switch side and pulpit side, because its good insulation resistance and optical signal transmission characteristics, optical signal transmission to the pulpit side, is guaranteed the electricity isolation that high-pressure side load ratio bridging switch collecting part and pulpit receiving unit are good simultaneously; Pulpit side, photoelectric switching circuit 17 convert light signal to digital signal, and microprocessor 18 with the real-time current waveform demodulation that receives out and is converted to analog signals by multichannel D A 19.Simultaneously, demodulation waveform out sends to transformer station's network 23 according to the IEC61850 agreement and carries out networking.
Terminating machine 24 receives the load ratio bridging switch network packet, its switching waveform is carried out real-time analysis, according to factors such as the amplitude of waveform, phase place, frequency analyses, judge the ruuning situation of load ratio bridging switch, when doubtful when electric fault or mechanical fault are arranged, and alarm, carrying out in case of necessity interruption maintenance, Accident prevention enlarges.The messaging software that terminating machine is installed can bank switching current waveform data and correlation analysis data constantly, and set up corresponding switch current waveform database, for late time data analysis and verification backup.
Load ratio bridging switch electric current on-line monitoring integral system, include on-load shunting switch internal high pressure side three-phase signal harvester, receiving trap and terminating machine three parts, system chart as shown in Figure 4, collecting part 25,26,31,32,33,34 gather respectively change-over switch A1 in the load ratio bridging switch, A2, B1, B2, C1, C2 working current waveform, after the signal processing, also decode to receiving trap 27 by Optical Fiber Transmission, all demodulation is out with three-phase change-over switch current waveform, corresponding analog signal output 20 is provided, and packs according to the IEC61850 agreement and to send to transformer station's network 23.Terminating machine 24 is processed and record according to each road Wave data.
Harvester is divided into A, B, C three-phase, and every phase acquisition device is divided into primary module and from module, installs separately, gathers respectively A1, A2, B1, B2, C1, C2 current signal.Take A phase acquisition device as example, as shown in Figure 4, the primary module of A phase acquisition device is installed on the A1 loop, is installed on A2 loop (vice versa) from module.As shown in Figure 3, primary module 25 comprise get can CT 9, getting can circuit 13, current measurement CT 8, signal processing circuit 14, electro-optical conversion circuit 15; Comprise from module 26 that get can CT 12, current measurement CT 11.
As shown in Figure 3, signal processing circuit 14 is nursed one's health OK range with primary module current measurement CT 8 with from the output of blocks current measurement CT 11, through the laggard row digital signal processing of analog to digital conversion, the digital signal after then will processing by electro-optical conversion circuit 15 is converted to light signal.Get can circuit 13 receive that primary modules get can CT 9 and get from module that can CT 12 get can signal, be converted to direct-flow voltage regulation source, give signal processing circuit 14 and electro-optical conversion circuit 15 power supplies.Optical fiber 16 is connected with on-load shunting switch side and pulpit side, and optical signal transmission is arrived the pulpit side.
The getting of harvester can adopt circuit primary module and from the module complementation get can mode as the harvester power supply, guarantee power supply reliability and long-time stability.By the load ratio bridging switch principle of work as can be known, when change-over switch switching during to A1, circuit A1 7 has electric current, and during to A2, circuit A2 10 has electric current, so A1 in the switching circuit to the change-over switch switching, and the A2 synchronization only only has wherein one the tunnel to have electric current to flow through.Because circuit A1 and circuit A2 only have one the tunnel to have electric current to flow through, therefore this circuit design for get simultaneously the A1 circuit get can CT1 9 and the A2 circuit get and can get energy by CT2 12, then have at least one to get and can provide electric energy by CT, getting in primary module can provide direct supply after circuit 13 conversion.And get and can circuit possess energy-storage function, guarantee change-over switch when switching, though circuit 17 and circuit 2 10 all can not normally get can, get and can circuit also can keep a period of time and continue to power to harvester.
The current signal that needs measurement is the dynamic current waveform in the load ratio bridging switch handoff procedure, judges the working condition of load ratio bridging switch according to the dynamic waveform of switching instant.Because the dynamic current in the handoff procedure is very large, can reach several times to tens times of the normal rating working current, and may contain DC component.Therefore, if current measurement CT adopts general current sensor unshakable in one's determination, volume is very large, and it is saturated easily to contain in the DC component situation iron core at primary current, and causing can not Measurement accuracy.Therefore the utility model adopts hollow coil current-sensing device, because this sensor does not contain ferromagnetic material, can accurately detect the dynamic current signal, and not be subjected to DC component influence, is fit to the detection of dynamic waveform.Volume is little, lightweight simultaneously, is fit to install.
The signal that current measurement CT1 8 and CT2 11 pick up out all is transferred to the signal processing circuit 14 in the primary module 25, after signal condition and high-precision high-speed A D sampling data is encoded.Coding adopts the high-speed serial data coding, and this serial digital amount signal comprises A1, A2 loop current signals, the A phase acquisition apparatus system self check data of A phase.And through electro-optical conversion circuit this serial digital amount signal is become light signal, by the receiving trap of an Optical Fiber Transmission to the pulpit side.
B phase, C phase acquisition device are with the A phase.
The receiving trap schematic diagram as shown in Figure 5, its core adopts microprocessor, receives the light signal that A, B, C three-phase harvester send, and carries out the data decoding after transferring light signal to electric signal.Microprocessor carries out framing with each road Wave data, harvester self check data, receiving trap self check data according to the IEC61850 communications protocol and sends triphasic wave graphic data, self check data decode and synchronous.The output of receiving trap employing Ethernet is connected to transformer station's network and carries out the data networking, and other equipment also can use this packet to carry out relevant treatment in the network, guarantee extendability and the dirigibility of system.Simultaneously, receiving trap to each road Wave data carry out D the A conversion, analog output is provided, guarantee that other harvesters can gather analog quantity and come proportional reduction change-over switch current waveform.
Such as Fig. 4, the installation of system comprises load ratio bridging switch side A phase acquisition device primary module 25, from module 26, B phase acquisition device primary module 32, from module 31; C phase acquisition device primary module 34, the installation from module 33, the installation of optical fiber 16, the installation that the pulpit side joint is received module 27 and terminating machine 24 and related software etc.
(1) installation of load ratio bridging switch internal high pressure side harvester
As shown in Figure 4, A phase A1 loop harvester primary module 25 is installed on the change-over switch circuit A1 of load ratio bridging switch, A phase A2 loop harvester is contained on the change-over switch circuit A2 of load ratio bridging switch from module 26, directly is enclosed within on the through-flow wire of A1, A2 to get final product.From module get can and current measurement signal all deliver to primary module and process, the output of primary module is sent to receiving trap 27 by optical fibre channel 16 with Wave data.The B phase is mutually identical with A with C phase acquisition device mounting means.
(2) installation of receiving trap
Receiving trap 27 power leads and optical fiber 16 are connected by the corresponding interface, receiving trap receives the light signal of A, B, C three- phase harvester 25,32,34, and behind photoelectric switching circuit 17, microprocessor 18 is decoded, with the Wave data demodulation out, it is synchronous to carry out data according to system clock.The output of receiving trap data has analog quantity A1, A2, B1, B2, C1, C2 current waveform output 20 and Ethernet output 22.Ethernet output data be according to the IEC61850 agreement to A1, A2, B1, B2, C1, C2 current waveform data, harvester self check data, receiving trap self check data are carried out the form of framing, are connected to transformer station's Ethernet 23 by netting twine.Panel indicated number receiving trap duty.
(3) installation of terminating machine
Terminating machine 24 adopts Windows system industrial computer, and its Ethernet interface receives transformer station's network 23 load ratio bridging switch switch current Wave data bags, also can directly receive the packet that receiving trap sends.Load ratio bridging switch electric current on-line monitoring integral system software is processed and is calculated according to the correlation function demand, and the load ratio bridging switch machine operation is diagnosed and fault pre-alarming.
Claims (6)
1. load ratio bridging switch electric current on-line monitoring integral system, comprise current collecting device, receiving trap, terminating machine, it is characterized in that: current collecting device is fixed in the load ratio bridging switch side, receiving trap is installed on the pulpit side, current collecting device links to each other with receiving trap by optical fiber, and receiving trap links to each other with terminating machine by transformer station's network; Described current collecting device carries out electric high and low pressure side insulation by optical fiber, and the transmission light digital signal is to receiving trap simultaneously, and described receiving trap sends to transformer station's network with the primary current Wave data framing that receives, and analog signal output is provided simultaneously.
2. load ratio bridging switch electric current on-line monitoring integral system according to claim 1, it is characterized in that: described current collecting device forms by primary module with from module, primary module comprise get can circuit, getting can CT, current detecting CT, signal processing circuit, electro-optical conversion circuit, comprises from module that get can CT, current detecting CT; Getting of primary module can CT and can link to each other by circuit with getting of primary module respectively by CT from getting of module, the current detecting CT of primary module with after current detecting CT from module links to each other with the signal processing circuit of primary module respectively by electro-optical conversion circuit output, cooperate primary module to get to guarantee the continuity of powering from module; Deliver to primary module from the current measurement signal of module and process, primary module carries out serial code to current signal data, the self check data of circuit 1 and circuit 2, sends to receiving trap by an optical fiber.
3. load ratio bridging switch electric current on-line monitoring integral system according to claim 1, it is characterized in that: the getting of described current collecting device can adopt circuit primary module, from module CT complementation get can mode as the harvester power supply, wherein get and to adopt ferromagnetic formula CT by CT, the getting of design can circuit obtain simultaneously change-over switch circuit A1 get can CT1 and circuit A2 get can the CT2 signal, can the output of CT secondary carry out conversion to getting, obtain DC voltage; Simultaneously, get and be designed with energy-storage units in can circuit and carry out energy storage.
4. load ratio bridging switch electric current on-line monitoring integral system according to claim 1, it is characterized in that: the input CT1 of described current collecting device and input CT2 all adopt hollow coil current transformer, signal processing circuit is with integrator, integration is carried out in output to the air core coil mutual inductor, reduction primary current waveform.
5. load ratio bridging switch electric current on-line monitoring integral system according to claim 1, it is characterized in that: described receiving trap comprises photoelectric switching circuit, microprocessor, multichannel D/A translation circuit, the network interface chip, the photoelectric switching circuit input end links to each other with the electro-optical conversion circuit output terminal of current collecting device by optical fiber, the photoelectric switching circuit output terminal links to each other with microprocessor, microprocessor respectively with multichannel D/A translation circuit, the network interface chip links to each other, microprocessor carries out framing with each road current waveform data of Real-Time Monitoring according to the IEC61850 communications protocol and sends, and is connected to transformer station's network by Ethernet; Simultaneously, the microprocessor of receiving trap to each road Wave data carry out D the A conversion, analog output is provided.
6. load ratio bridging switch electric current on-line monitoring integral system according to claim 1, it is characterized in that: described terminating machine carries out fault diagnosis and early warning according to the change-over switch current waveform of Real-Time Monitoring to load ratio bridging switch.
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| CN 201320168107 CN203259586U (en) | 2013-04-07 | 2013-04-07 | Current on-line monitoring integrated system of on-load tap-changer |
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| CN 201320168107 CN203259586U (en) | 2013-04-07 | 2013-04-07 | Current on-line monitoring integrated system of on-load tap-changer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217566A (en) * | 2013-04-07 | 2013-07-24 | 武汉格蓝若光电互感器有限公司 | Current online monitoring integrated system of on-load tap changer |
| CN104280153A (en) * | 2014-10-07 | 2015-01-14 | 国家电网公司 | Temperature measurement device of oil-immersed transformer on-load tap-changer oil chamber |
| CN110785671A (en) * | 2017-06-23 | 2020-02-11 | 法雷奥开关和传感器有限责任公司 | Circuit arrangement for evaluating at least two switching states of an actuating element, method for operating a circuit arrangement and switching device |
| CN112630644A (en) * | 2020-12-15 | 2021-04-09 | 中国电力科学研究院有限公司 | Method and system for on-line monitoring on-load tap-changer switching program based on photoelectric signal |
-
2013
- 2013-04-07 CN CN 201320168107 patent/CN203259586U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217566A (en) * | 2013-04-07 | 2013-07-24 | 武汉格蓝若光电互感器有限公司 | Current online monitoring integrated system of on-load tap changer |
| CN104280153A (en) * | 2014-10-07 | 2015-01-14 | 国家电网公司 | Temperature measurement device of oil-immersed transformer on-load tap-changer oil chamber |
| CN110785671A (en) * | 2017-06-23 | 2020-02-11 | 法雷奥开关和传感器有限责任公司 | Circuit arrangement for evaluating at least two switching states of an actuating element, method for operating a circuit arrangement and switching device |
| CN110785671B (en) * | 2017-06-23 | 2022-02-18 | 法雷奥开关和传感器有限责任公司 | Circuit arrangement, method for operating a circuit arrangement and switching device |
| CN112630644A (en) * | 2020-12-15 | 2021-04-09 | 中国电力科学研究院有限公司 | Method and system for on-line monitoring on-load tap-changer switching program based on photoelectric signal |
| CN112630644B (en) * | 2020-12-15 | 2023-03-14 | 中国电力科学研究院有限公司 | Method and system for on-line monitoring on-load tap-changer switching program based on photoelectric signal |
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