CN103543305A - Low damping alternating-current high-voltage generator for detecting power equipment local discharge - Google Patents

Low damping alternating-current high-voltage generator for detecting power equipment local discharge Download PDF

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Publication number
CN103543305A
CN103543305A CN201310476684.8A CN201310476684A CN103543305A CN 103543305 A CN103543305 A CN 103543305A CN 201310476684 A CN201310476684 A CN 201310476684A CN 103543305 A CN103543305 A CN 103543305A
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China
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voltage
power
capacitor
generator
power equipment
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CN201310476684.8A
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CN103543305B (en
Inventor
张伟
侯喆
李洪杰
黄志伟
薛荣
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Xian Jiaotong University
Shenzhen Power Supply Bureau Co Ltd
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Xian Jiaotong University
Shenzhen Power Supply Bureau Co Ltd
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Abstract

The invention discloses a low damping alternating-current high-voltage generator for detecting power equipment local discharge. The low damping alternating-current high-voltage generator comprises a high-power direct-current power supply connected with an alternating-current power supply, a high-voltage semiconductor switch connected with the direct-current power supply, an electric reactor unit connected with the high-voltage semiconductor switch, a resistance-capacitance divider parallelly connected with the electric reactor unit, and a capacitor unit parallelly connected with the resistance-capacitance divider. The low damping alternating-current high-voltage generator has the advantages that inductance equipment such as transformers and electric reactors can replace the electric reactor unit directly, or capacitors of large-capacity testing objects such as power cables can replace the capacitor unit, and local discharge detection can be performed on various power equipment by adjusting the inductor and capacitor elements in the main LC resonance circuit of the generator; the whole generator belonging to lossless local discharge low damping alternating-current high-voltage detecting devices is light, reliable in operation, high in safety, and the like; the generator is applicable to local discharge detection of various capacitance and inductance equipment, and suitable for field detection of various power equipment such as transformers, electric reactors, capacitors and cables.

Description

A kind of power equipment Partial Discharge Detection underdamping ac high voltage generator
Technical field
The present invention relates to Electric Power Equipment Insulation state inspection and application thereof, particularly relate to a kind of high pressure underdamping alternating-voltage generator of using for power equipment Partial Discharge Detection.
Background technology
Partial Discharge Detection and assignment test belong to the important content of on-the-spot commissioning test and the repair based on condition of component work of power cable.For the power equipment with high capacitance, the volume and weight of the frequency high voltage power supply that its site test is required is conventionally all very large, and transportation difficulty, is difficult to meet on-the-spot test demand.In the last few years, a kind of advanced person's dfamped alternating current voltage tester technology had obtained application more and more widely at electric power enterprise.This type of portable devices type is strong, easy to operate, has good equivalence with power frequency ac voltage, is applicable to the site test of all kinds of high capacitance power equipments.
Yet, current dfamped alternating current voltage tester technology also exists some technical matterss to wait to solve in actual applications: 1) the critical component high-voltage semi-conductor switch of dfamped alternating current voltage generator is among LC series resonant tank, and the through-current capability of semiconductor switch has restricted further applying of wave of oscillation measuring technology.The performance of Simultaneous Switching and accessory circuit thereof also can exert an influence to waveform and test effect; 2) traditional dfamped alternating current voltage testing system need to be used high-voltage DC power supply to major loop electric capacity and Devices to test charging when test, this makes Devices to test first must bear the high direct voltage of long period standing damped oscillation wavefront, has affected the equivalence of damped oscillation wave voltage and power frequency ac voltage shelf depreciation test result.3) traditional topological structure requires dfamped alternating current voltage testing system must have high-voltage DC power supply, and the two ends of air reactor all need higher insulating Design, these factors have also increased the volume and weight of existing testing apparatus, have reduced the portability of equipment.4) traditional dfamped alternating current voltage testing system is only applicable to have the power equipment of high capacitance, for low-voltage capacity or induction equipment, cannot carry out shelf depreciation test job.Therefore, a kind of safe, portable, efficient novel underdamping ac high voltage generator of designing and making how, solve the realistic problem that the power equipment partial discharge monitoring system based on dfamped alternating current Voltage Technique faces at present, one of real important subject that belongs to current industry.
Summary of the invention
Technical matters to be solved by this invention is, a kind of underdamping ac high voltage generator with novel topological structure is provided, and there is the features such as safe, portability is strong, be widely used, to overcome the monitoring system of the prior art deficiency that technical elements exists in the application practice of electric power enterprise and difficult.
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator, and this high pressure generator mainly comprises following unit:
High-power DC power supply S11, is connected with power frequency AC, for giving whole generator power supply;
High-voltage semi-conductor K switch 11, is connected with direct supply, for the charge circuit to generator, controls;
Reactor unit L11, its one end is connected with high-voltage semi-conductor K switch 11, and other end ground connection is energy storage and the oscillating unit of whole generator;
RC divider V11, L11 is in parallel with reactor unit, for measuring high pressure damped oscillation waveform and the corresponding local discharge signal at Devices to test two ends;
Capacitor cell C11, V11 is in parallel with RC divider, participates in major loop and vibrates and regulate oscillation frequency.
Preferably, described high-power DC power supply further comprises:
Large current commutates bridge B21, two input end is connected with alternating current 220V, one end ground connection of output terminal;
The first capacitor C 21, its two ends are in parallel with two output terminals of rectifier bridge respectively;
High speed electronic switch K21, its one end is connected with the first capacitor C 21, and the other end is connected with the second capacitor C 22;
The second capacitor C 22, its one end is connected with described electronic switch K21's, other end ground connection;
Inductance L 21, its one end is connected with described the second capacitor C 22, and the other end is connected with the 3rd capacitor C 23;
The 3rd capacitor C 23, the output terminal that its one end is direct supply, is connected with described inductance L 21, other end ground connection.
Preferably, when scene is during without power frequency AC, the high-power DC power supply S11 in generator can be replaced by jumbo rechargeable battery.
Preferably, described reactor unit L11 is in parallel with Devices to test, and has the low internal resistance value of the slow-decay that guarantees dfamped alternating current voltage waveform.
Preferably, described reactor unit L11 winding is wound on epoxy skeleton by enamel covered wire segmentation, and between adjacent two sections of windings, uses insulation barrier isolation fixing, has good withstand voltage properties.
Preferably, described high-voltage semi-conductor K switch 11 is in series by the module of a plurality of low-voltage-grades, and each unit module is connected and composed successively by high voltage isolating transformer, IGBT drive plate, IGBT module and corresponding buffer protection circuit respectively.
Preferably, the input end of described high-voltage semi-conductor K switch 11 exchanges with 220V and is connected, and the drive plate of IGBT is by optical fiber transfer control signal.
Preferably, described high-voltage semi-conductor K switch 11 is only worked in charge circuit, does not participate in the vibration of major loop.
The present invention compares with device in the past, high-voltage semi-conductor switch does not participate in the oscillatory process of major loop, and charge circuit is without high-voltage DC power supply, the initial time of the dfamped alternating current HT waveform producing is close to earth potential, make whole system have that device is light, reliable operation, the advantages such as security height, belong to harmless shelf depreciation underdamping ac high-voltage proving installation.By inductance and capacitor cell in adjusting gear main oscillations loop, this generator can carry out shelf depreciation test to various capacitives and induction equipment, is applicable to the on-the-spot test of the multiple power equipments such as transformer, reactor, capacitor and cable simultaneously.
Implement embodiments of the invention, there is following beneficial effect:
1, the underdamping ac high voltage generator in the present invention adopts novel main circuit topological structure, and whole device reliable operation is easy to operate, portable strong, is applicable to the Partial Discharge Testing on Site of all kinds of power equipments;
2, high-voltage semi-conductor switch of the present invention, only in current supply circuit, does not participate in the oscillatory process of high pressure dfamped alternating current voltage major loop, is conducive to extend the serviceable life of switch, has promoted system testing capacity simultaneously yet and has improved test effect;
3, the air reactor in this test macro is in parallel with Devices to test, the direct ground connection in one end, and the High-Voltage Insulation that does not need two ends all to meet system requirements designs, and has greatly simplified design and the using method of reactor;
4, the underdamping ac high voltage generator of the embodiment of the present invention is when carrying out on-the-spot partial discharge monitoring, there is scene in a lot of situations not have AC power to use, now only need the lithium battery direct supply of access 30V/10A can carry out test job, use-pattern is flexible;
5, the underdamping ac high voltage generator of the embodiment of the present invention is when carrying out on-the-spot partial discharge monitoring, and operating personnel only need control charge circuit in low-pressure side can produce required dfamped alternating current high pressure.Compare with existing proving installation: in the energy storage charging stage of major loop, be applied to the DC voltage at Devices to test two ends close to earth potential, can better equivalent power frequency ac voltage, especially the test product that is not suitable for carrying out HVDC TEST for some (for example, twisted polyethylene cable), there is obvious advantage.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the main circuit structure schematic diagram of an embodiment of underdamping ac high voltage generator for a kind of power equipment Partial Discharge Detection of the present invention.
Fig. 2 is the electrical block diagram of high-power DC power supply in an embodiment of underdamping ac high voltage generator for a kind of power equipment Partial Discharge Detection of the present invention.
Fig. 3 is an embodiment hollow core reactor winding construction schematic diagram of underdamping ac high voltage generator for a kind of power equipment Partial Discharge Detection of the present invention.
Fig. 4 is that a kind of power equipment Partial Discharge Detection of the present invention forms block diagram with an embodiment mesohigh semiconductor switch of underdamping ac high voltage generator.
Fig. 5 is the high-voltage signal oscillogram at Devices to test two ends in an embodiment of underdamping ac high voltage generator for a kind of power equipment Partial Discharge Detection of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, be described in further detail.
As shown in Figure 1, be an embodiment of underdamping ac high voltage generator for a kind of power equipment Partial Discharge Detection of the present invention.This generator mainly comprises: high-power DC power supply S11, high-voltage semi-conductor K switch 11, reactor unit L11, RC divider V11 and capacitor cell C11.
Wherein, high-power DC power supply S11 is connected with power frequency AC, and for powering to whole system, its highest output dc voltage is less than 500V in one embodiment, and output current is less than 50A.
High-voltage semi-conductor K switch 11, its two ends are connected with the non-ground-end of DC source and air reactor respectively, for the charge circuit to whole device, control, and protect the low-pressure side elements such as direct supply when major loop produces dfamped alternating current high pressure simultaneously.In one embodiment, switching speed is less than 1 μ s, the withstand voltage 25kV that is greater than, and rated current is greater than the semiconductor switch module of 80A.
Reactor unit L11 adopts air reactor, and its one end is connected with high-voltage semi-conductor K switch 11, and other end ground connection is energy storage and the oscillating unit of whole device.When high-voltage semi-conductor K switch 11 is closed, flow through certain DC current in reactor, size of current is determined by the internal resistance of charging voltage, the internal resistance of source and reactor; After high-voltage semi-conductor K switch 11 disconnects, reactor, by the capacitor resonance in parallel with it, produces dfamped alternating current high pressure.Can to select internal resistance be 2 Ω to air reactor in one embodiment, and inductance value is 600mH, and instantaneous through-current capability is greater than the fine rule air reactor of 50A.
RC divider V11, L11 is in parallel with air reactor, for measuring the dfamped alternating current voltage waveform at Devices to test two ends.In one embodiment, can select withstand voltage 50kV, the high-pressure resistance-capacitance voltage divider that intrinsic standoff ratio is 1:10000, total series capacitance of electric capacity arm is less than 1nF, and total resistance in series of resistive arm is 50M Ω.
Capacitor cell C11 selects the large electric capacity of low-loss high pressure, V11 is in parallel with RC divider, its one end is the output terminal of device, participate in oscillation circuit and also regulate oscillation frequency, C11 choose by the equivalent electric of power equipment to be measured perhaps the frequency of inductance and test voltage determined.In one embodiment, C11 can select 1uF, the noninductive polypropylene screen of low-loss (CBB) electric capacity of withstand voltage 30kV.
Its specific works process is: closed high semiconductor switch K11 first, increase gradually the output voltage of high-power DC power supply S11, when the electric current in reactor unit L11 reaches preset value, disconnect high-voltage semi-conductor K switch 11, reactor unit L11 and capacitor cell C11 will form LC resonant tank.When reactor unit L11 and the internal resistance of LC resonant tank hour, Devices to test or RC divider V11 two ends will produce underdamping ac high-voltage.By inductance and capacity cell in main LC resonant tank in regulating device, this generator can carry out measurement of partial discharge to multiple power equipment.Particularly, for induction equipments such as transformer and reactors, Devices to test directly can be replaced to the reactor unit L11 in generator, then according to oscillation frequency requirement, select suitable capacitor cell C11; When the Devices to test large capacity test product such as be power cable, the electric capacity of available test product self replaces the capacitor cell C11 in generator, reactor unit is selected the air reactor of low internal resistance value, and when the electric capacity of test product hour, can and engage suitable building-out capacitor and regulate oscillation frequency.
As shown in Figure 2, be the electrical block diagram of high-power DC power supply in one embodiment of the invention.Preferably, high-power DC power supply further comprises: large current commutates bridge B21, and its input end is connected with alternating current 220V, one end ground connection of output terminal; The first capacitor C 21, its two ends are in parallel with two output terminals of rectifier bridge respectively; High speed electronic switch K21, its one end is connected with the first capacitor C 21, and the other end is connected with the second capacitor C 22; The second capacitor C 22, its one end is connected with described electronic switch K21's, other end ground connection; Inductance L 21, its one end is connected with described the second capacitor C 22, and the other end is connected with the 3rd capacitor C 23; The 3rd capacitor C 23, the output terminal that its one end is direct supply, is connected with described inductance L 21, other end ground connection.
In one embodiment, the parameter value of above-mentioned each element is chosen as: B21 is the withstand voltage 500V(AC of being not less than), the through-flow high-voltage rectifier bridge that is not less than 50A; Capacitor C 21=C22=C23=100uF, and the withstand voltage 500V that is greater than; Inductance L 21=100uH, the through-flow 50A that is not less than; High speed electronic switch K21 wherein adopts MOSFET power electronic devices, the withstand voltage 500V that is not less than, and electric current is not less than 100A, and its control signal is provided by corresponding pulse-length modulation (PWM) circuit.
When test site is during without power frequency AC, the high-power DC power supply S11 in generator is replaced by jumbo rechargeable battery.
As shown in Figure 3, be one embodiment of the invention hollow core reactor winding construction schematic diagram.In figure, 1 is reactor winding, and 2 is graded insulation baffle plate.Preferably, described air reactor adopts on enamel covered wire segmentation coiling and epoxy skeleton, uses insulation barrier isolation fixing between adjacent two sections of windings, and this kind of winding construction can make reactor have less volume under the prerequisite that guarantees electric property.
In one embodiment, the winding of reactor adopts the enamel covered wire of diameter 2mm, divides 4 sections and carries out coiling, and winding overall height is 30cm, and total number of turns is 1500 circles.Between each sectional wind, adopting thickness is that the polyfluortetraethylene plate of 10mm is isolated.
Reactor is withstand voltage, and the 30kV(of reaching partial discharge quantity is less than 10pC).
Reactor unit L11 is in parallel with Devices to test, and has the low internal resistance value of the slow-decay that guarantees dfamped alternating current voltage waveform.
As shown in Figure 4, be that one embodiment of the invention mesohigh semiconductor switch forms block diagram.Preferably, described high-voltage semi-conductor K switch 11 is only worked in charge circuit, does not participate in the vibration of major loop.Its concrete structure is in series by the module of a plurality of low-voltage-grades, and each module is connected and composed successively by high voltage isolating transformer, IGBT drive plate, IGBT module and corresponding buffer protection circuit respectively.The input end of high voltage isolating transformer exchanges with 220V and is connected, and the drive plate of IGBT is by optical fiber transfer control signal.
In one embodiment, can use 10 low-grade switch modules to connect, the withstand voltage 3.3kV of IGBT that each unit module is selected, electric current is not less than the module of 100A; High voltage isolating transformer is selected isolation voltage 30kV, power 20w; For guaranteeing the consistance ,Ge road of switch, select the optical fiber transfer control signal of equal length (2m); Buffer protection circuit can select RCD type circuit to protect, and design parameter is: R=10 Ω, C=1nF(is withstand voltage is not less than 4kV), D selects the fast recovery schottky diode series connection of 3 1.2kV.
As shown in Figure 5, be the output waveform of the underdamping ac high-voltage of (specifically referring to Fig. 1 introduction) in one embodiment of the invention.As can be seen from this figure, after choosing by the parameter of embodiment described in Fig. 1, generator of the present invention can produce the high pressure damp oscillatory wave that amplitude reaches 20kV, and this waveform initial time initial value is close to earth potential, be ms level oscillation period, can equivalent industrial frequency AC high pressure.
Above disclosed is only preferred embodiment of the present invention; so can not limit interest field of the present invention with this; those skilled in the art utilize the technology contents of above-mentioned exposure to make a little simple modification, equivalent variations or modification, within still belonging to protection scope of the present invention.

Claims (8)

1. a power equipment Partial Discharge Detection underdamping ac high voltage generator, is characterized in that, this high pressure generator mainly comprises following unit:
High-power DC power supply S11, is connected with power frequency AC, for giving whole generator power supply;
High-voltage semi-conductor K switch 11, is connected with direct supply, for the charge circuit to generator, controls;
Reactor unit L11, its one end is connected with high-voltage semi-conductor K switch 11, and other end ground connection is energy storage and the oscillating unit of whole generator;
RC divider V11, L11 is in parallel with reactor unit, for measuring high pressure damped oscillation waveform and the corresponding local discharge signal at Devices to test two ends;
Capacitor cell C11, V11 is in parallel with RC divider, participates in major loop and vibrates and regulate oscillation frequency.
2. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator as claimed in claim 1, is characterized in that, described high-power DC power supply S11 further comprises:
Large current commutates bridge B21, two input end is connected with alternating current 220V, one end ground connection of output terminal;
The first capacitor C 21, its two ends are in parallel with two output terminals of large current commutates bridge B21 respectively;
High speed electronic switch K21, its one end is connected with the first capacitor C 21, and the other end is connected with the second capacitor C 22;
The second capacitor C 22, its one end is connected with described electronic switch K21's, other end ground connection;
Inductance L 21, its one end is connected with described the second capacitor C 22, and the other end is connected with the 3rd capacitor C 23;
The 3rd capacitor C 23, the output terminal that its one end is direct supply, is connected with described inductance L 21, other end ground connection.
3. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator as claimed in claim 2, is characterized in that, when test site is during without power frequency AC, the high-power DC power supply S11 in generator is replaced by jumbo rechargeable battery.
4. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator according to claim 1, is characterized in that, described reactor unit L11 is in parallel with Devices to test, and has the low internal resistance value of the slow-decay that guarantees dfamped alternating current voltage waveform.
5. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator according to claim 4, is characterized in that, described reactor unit L11 section of winding is wound on epoxy skeleton, and fixing with insulation barrier isolation between adjacent two sections of windings.
6. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator according to claim 1; it is characterized in that; described high-voltage semi-conductor K switch 11 is in series by the module of a plurality of low-voltage-grades, and each unit module is connected and composed successively by high voltage isolating transformer, IGBT drive plate, IGBT module and corresponding buffer protection circuit respectively.
7. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator according to claim 6, is characterized in that, the input end of described high-voltage semi-conductor K switch 11 exchanges with 220V and is connected, and the drive plate of IGBT is by optical fiber transfer control signal.
8. a kind of power equipment Partial Discharge Detection underdamping ac high voltage generator according to claim 6, is characterized in that, described high-voltage semi-conductor K switch 11 is only worked in charge circuit, does not participate in the oscillatory process of major loop.
CN201310476684.8A 2013-10-12 2013-10-12 A kind of power equipment Partial Discharge Detection underdamping ac high voltage generator Active CN103543305B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104965160A (en) * 2015-05-29 2015-10-07 广西电网有限责任公司电力科学研究院 Cable partial discharge detection method and detection apparatus
CN106018894A (en) * 2016-05-03 2016-10-12 苏州泰思特电子科技有限公司 Damped oscillation wave voltage generator applied to electromagnetic compatibility test
CN106018893A (en) * 2016-05-03 2016-10-12 苏州泰思特电子科技有限公司 Oscillatory wave high voltage generator applied to electrical test
CN109581161A (en) * 2018-12-18 2019-04-05 西安交通大学 A kind of 10kV transformer Portable PD On-Line detection system based on oscillation wave

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781667A (en) * 1972-03-17 1973-12-25 Gen Electric High voltage resonant testing circuit
CN101349734A (en) * 2008-09-02 2009-01-21 薛建仁 Apparatus for generating oscillating wave for electrical apparatus test
CN102412739A (en) * 2011-12-08 2012-04-11 大连理工大学 Ultra low frequency high-voltage power supply
CN202693739U (en) * 2012-06-19 2013-01-23 扬州市双宝电力设备有限公司 Series resonance voltage withstand test device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781667A (en) * 1972-03-17 1973-12-25 Gen Electric High voltage resonant testing circuit
CN101349734A (en) * 2008-09-02 2009-01-21 薛建仁 Apparatus for generating oscillating wave for electrical apparatus test
CN102412739A (en) * 2011-12-08 2012-04-11 大连理工大学 Ultra low frequency high-voltage power supply
CN202693739U (en) * 2012-06-19 2013-01-23 扬州市双宝电力设备有限公司 Series resonance voltage withstand test device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104965160A (en) * 2015-05-29 2015-10-07 广西电网有限责任公司电力科学研究院 Cable partial discharge detection method and detection apparatus
CN104965160B (en) * 2015-05-29 2018-01-23 广西电网有限责任公司电力科学研究院 A kind of cable local discharge detection method and detection means
CN106018894A (en) * 2016-05-03 2016-10-12 苏州泰思特电子科技有限公司 Damped oscillation wave voltage generator applied to electromagnetic compatibility test
CN106018893A (en) * 2016-05-03 2016-10-12 苏州泰思特电子科技有限公司 Oscillatory wave high voltage generator applied to electrical test
CN106018894B (en) * 2016-05-03 2019-01-11 苏州泰思特电子科技有限公司 EMC test attenuation oscillasion impulse voltage generator
CN106018893B (en) * 2016-05-03 2019-04-05 苏州泰思特电子科技有限公司 Oscillation wave high-voltage generator for electrical test
CN109581161A (en) * 2018-12-18 2019-04-05 西安交通大学 A kind of 10kV transformer Portable PD On-Line detection system based on oscillation wave

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