CN203287445U - DC insulator ionic migration test equipment - Google Patents
DC insulator ionic migration test equipment Download PDFInfo
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- CN203287445U CN203287445U CN2013200034085U CN201320003408U CN203287445U CN 203287445 U CN203287445 U CN 203287445U CN 2013200034085 U CN2013200034085 U CN 2013200034085U CN 201320003408 U CN201320003408 U CN 201320003408U CN 203287445 U CN203287445 U CN 203287445U
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- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 239000012212 insulator Substances 0.000 title claims abstract description 56
- 238000009791 electrochemical migration reaction Methods 0.000 title abstract 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000013508 migration Methods 0.000 claims description 44
- 230000005012 migration Effects 0.000 claims description 44
- 238000002955 isolation Methods 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model relates to DC insulator ionic migration test equipment which comprises a power-driven voltage regulator, a high-voltage transformer, a rectification filter, a calorstat, an industrial computer and a measuring instrument. The DC insulator ionic migration test equipment is characterized in that power is supplied to test insulators through the power-driven voltage regulator, the high-voltage transformer and the rectification filter; the calorstat guarantees that a test is conducted with constant temperatures; the industrial computer controls data collecting of a measuring circuit and heating information; and a 5.5-digit digital multimeter is adopted as the measuring instrument and measures voltage and current signals. The DC insulator ionic migration test equipment has the advantages of being high in current accuracy, protection effect, temperature uniformity, and temperature measuring reliability, being convenient in insulator installation and the like.
Description
Technical field
The utility model belongs to the insulator testing equipment, relates to a kind of D.C. isolation daughter ion migration test equipment.
Background technology
Electric power is a kind of energy of being convenient to carry of cleaning, China is just greatly developing the electric power conveying at present, extra-high voltage engineering particularly, direct current transportation is compared with ac transmission, have that the circuit cost is low, energy loss is little, little to Communication Jamming, need not reactive-load compensation, do not need the factor such as synchronous, easily stable control, therefore rapidly, China has the above DC power transmission line of many ± 500kV at present in development at present.Therefore the DC Insulator that is used on DC power transmission line is exactly very important parts, studies its stability, by test, judges its serviceable life, and deterioration condition, just seem very important.
Under DC voltage, direction of an electric field immobilizes, will cause like this ion in insulator to move to a direction always, namely our the common ion of saying moves, this migration electric charge can produce certain bad effect to insulating material, GB GB/T 19443-2004 and IEC61325:2008 stipulated the insulator ion migration life-span greater than 50 years at present, and this just need to verify that insulator can move the quantity of electric charge of 50 years by the mode of test.According to the characteristic of porcelain insulator and glass insulator, temperature is higher, and the ion migration velocity is faster,, so need to find a temperature and voltage, makes the migration quantity of electric charge of 50 years under normal operation to complete in several days, so just has the possibility of test.At present the standard code trial voltage be+65kV-+75kV, test temperature is 90 ℃-120 ℃, chooses the test parameters of optimum in this scope.
At present, the ion migration test of DC Insulator is mainly by adopting under high voltage, the ion migration amount (migration electric charge) of DC Insulator to be tested, the ion migration under 50 years physical environments of analog insulation.Existing testing apparatus is mainly manual switching, manually calculates electric current and electric charge.What the equipment of Japan insulator (NGK) Co., Ltd. ion migration adopted is the combined type registering instrument, and current measurement adopts external resistor to convert voltage system (I/V) mode to.Its size of current does not adopt different resistance simultaneously, and resistance precision (affected by the factors such as temperature) affects measuring accuracy.More domestic universities and scientific research institution adopt megger or microampere meter to measure so faint current signal, are difficult to guarantee precision and the accuracy of its measurement.While in addition, adopting these equipment for measurement data read the record and analyzing and processing all need manually to carry out.So introduce unavoidably some artificial measuring error.Adopt the combined type registering instrument to measure, though can realize that the artificial intervention of the automatic printing of data is less, equipment itself is also relatively backward.
For temperature survey in chamber, at present all adopt wired mode to measure insulator cap head temperature, although the insulator cap head is connected to the ground in theory, there do not is high voltage etc., but in fact still can introduce high voltage interference, not only can damage equipment, simultaneously survey crew is formed certain threat, extremely dangerous.
In view of this, the utility model provides a kind of D.C. isolation daughter ion migration test equipment, to meet the commercial Application needs.
Summary of the invention
The purpose of this utility model is to provide a kind of D.C. isolation daughter ion migration test equipment, and it has the characteristics such as high current precision, high protection effect, high-temperature homogeneity, high-temperature are measured reliability and insulator is easy for installation.
For overcoming the above problems, the utility model provides a kind of D.C. isolation daughter ion migration test equipment, comprise electric voltage regulator, high-tension transformer, rectifying and wave-filtering, constant temperature oven, industrial computer and surveying instrument, it is characterized in that, come to the power supply of test insulator by electric voltage regulator, high-tension transformer, rectifying and wave-filtering, guarantee to test by constant temperature oven and carry out in constant temperature, data acquisition by the Industrial Computer Control measuring circuit and add thermal information, surveying instrument adopts 5 Semi-digital multimeters, measuring voltage and current signals.
D.C. isolation daughter ion migration test equipment as above, is characterized in that, adopts the high-accuracy desk-top digital watch of 5 half, its testing current precision high sensitivity is 1nA, the voltage tester precision is accurate to 1 μ V, and measuring current reaches 10A, and test voltage reaches 1000V.
D.C. isolation daughter ion migration test equipment as above, it is characterized in that, adopt biswitch switched design in parallel, under normal ion transition state, the test loop switch opens, the migration circuit switching is closed, when needs are tested this road, first close the test loop switch, then open the migration circuit switching, guarantee like this in whole test handoff procedure without the ground connection disconnection, guarantee that test loop is not subjected to the impact of high voltage floating potential.
D.C. isolation daughter ion migration test equipment as above, is characterized in that, design series multistage high-tension resistive adds the holding circuit of TVS pipe, and in each road access port series connection one quick fuse pipe mode, protect.
D.C. isolation daughter ion migration test equipment as above, it is characterized in that, adopt the dual-surface stereo body structure, two fan clamshell doors are respectively arranged before and after casing, there are four layers of insulator rack on two sides, can place 28 insulators, in actual tests, two box body combinations, can place 56 insulators.
D.C. isolation daughter ion migration test equipment as above, it is characterized in that, insulator is placed horizontally on the insulation subrack of casing, this insulation subrack is divided into the cap headstock and steel foot rest, utilize the insulator deadweight to be fixed on the insulation subrack, need not any fixing operation, this insulation subrack can be stretched simultaneously, assurance can be positioned on this insulation subrack from the insulator of 70kN to 550kN, has guaranteed that test can cover all insulators.
D.C. isolation daughter ion migration test equipment as above, it is characterized in that, adopt the mode of two air channels convective heating, the casing low side has two air outlets, the wind direction of air outlet can be regulated by louver, two air draught wind-tunnel are arranged at casing top, the casing heating tube is positioned at the casing both sides, hot gas blows out from bottom half like this, the casing upper air blows out from bottom half after being sucked into heating furnace again, the casing both sides respectively form the air circuit of a heating, two heating circuits exist cross-ventilation to exchange in casing simultaneously, guaranteed like this temperature homogeneity in casing.
D.C. isolation daughter ion migration test equipment as above, it is characterized in that, use the wireless temperature survey sensor, this sensor internal has permanent magnet, can be adsorbed onto on insulator cap, and its temperature value is convenient for measuring the temperature of each insulator cap for being wirelessly transmitted to the casing outside, and can, with outside case inner high voltage outlet box, not increase security.
The utility model has the advantage of: 1) this equipment can be completed Q/D prediction experiment, bulk resistor test, stored charge test, heat damage test automatically; Can automatically generate test report; Process of the test computing machine Automatic Control, need not manual intervention.While 2) using this equipment to test, the measuring accuracy of electric current can reach 0.001 μ A, faint difference between different insulative.While 3) flashover occurring, the system testing circuit is without damage, and holding circuit has played due effect.4) 52 test insulators are installed and are only taken up an area 7.28 square metres.Floor area is little.
Description of drawings
Fig. 1 is the design frame chart of ion migration test equipment of the present utility model.
Fig. 2 is the measure portion design frame chart of ion migration test equipment of the present utility model.
Fig. 3 is the holding circuit figure of ion migration test equipment of the present utility model.
Fig. 4 is that the insulator of ion migration test equipment of the present utility model is arranged and the support Design block diagram.
Fig. 5 is the constant temperature oven design frame chart of ion migration test equipment of the present utility model.
Embodiment
, in order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Description of symbols in accompanying drawing:
The grounding switch in the loop of Fig. 2: Kd representative, the measuring switch in a Kc representative minute loop, master switch is measured in the Ki representative, each loop, by one group of grounding switch Kd and measuring switch Kc, guarantee that measuring circuit is complete loop to high-voltage safety ground at any time, guarantee the security of testing;
Fig. 3: R is protective resistance, and TVS is transient voltage suppressor diode, and GDT is ceramic gas discharge tube, and Re is voltage dependent resistor (VDR);
Fig. 4: 7-support insulator, 8-support, 9-guarded electrode, 10-measuring-signal, 11-shielded cable, 12-insulating sleeve, 13-hook;
Fig. 5: 1, the upper inlet scoop of 2-, 3, air outlet under 4-, 5, the 6-heating tube.
The utility model general system set-up as shown in Figure 1, a kind of D.C. isolation daughter ion migration test equipment, comprise electric voltage regulator, high-tension transformer, rectifying and wave-filtering, constant temperature oven, industrial computer and surveying instrument, it is characterized in that, come to the power supply of test insulator by electric voltage regulator, high-tension transformer, rectifying and wave-filtering, guarantee to test by constant temperature oven and carry out in constant temperature, data acquisition by the Industrial Computer Control measuring circuit and add thermal information, surveying instrument adopts 5 Semi-digital multimeters, measuring voltage and current signals.
Adopt the high-accuracy desk-top digital watch of 5 half, its testing current precision high sensitivity is 1 nA, and the voltage tester precision is accurate to 1 μ V(1000:1 voltage divider realistic accuracy and reaches 0.001V).Testing range can automatically switch, and measuring current is up to 10A, and test voltage, up to 1000V, can meet the test needs fully.
Adopt biswitch switched design in parallel, under normal ion transition state, the test loop switch opens, the migration circuit switching is closed, when needs are tested this road, first close the test loop switch, then open the migration circuit switching, guarantee like this in whole test handoff procedure without the ground connection disconnection, guarantee that test loop is not subjected to the impact of high voltage floating potential.
Design series multistage high-tension resistive adds the holding circuit of TVS pipe, and in each road access port series connection one quick fuse pipe mode, protects.After preventing that DC Insulator from puncturing; at first TVS pipe in the two poles of the earth, front is protected circuit; strive for before the TVS pyrolytic damage; at first the primary side overcurrent protection moves; the cutoff high input power, if primary side does not move front TVS and damages, large electric current is when entering circuit board; quick fuse pipe meeting fuse protection, prevent that electric current from further entering rear one-level circuit and instrument results in greater loss.But after fuse tube fusing, for preventing that under suspended state, input end is to other equipment discharges, design is input end to be covered copper-clad ground process.Allow the fuse input terminal discharge to the high pressure ground that coats.Prevent its damage to other circuit.
Adopt the dual-surface stereo body structure, two fan clamshell doors are respectively arranged before and after casing, there are four layers of insulator rack on two sides, can place 28 insulators.In actual tests, two box body combinations, can do 56 insulators.
Insulator is placed horizontally on the insulation subrack of casing, this insulation subrack is divided into the cap headstock and steel foot rest, utilize the insulator deadweight to be fixed on the insulation subrack, need not any fixing operation, the subrack that should insulate simultaneously is all scalable, assurance can be positioned on this insulation subrack from the insulator of 70kN-550kN, has guaranteed that test can cover all insulators.
Adopt the mode of two air channels convective heating, the casing low side has two air outlets, the wind direction of air outlet can be regulated by louver, two air draught wind-tunnel are arranged at casing top, and the casing heating tube is positioned at the casing both sides, and hot gas blows out from bottom half like this, the casing upper air blows out from bottom half after being sucked into heating furnace again, the casing both sides respectively form the air circuit of a heating, and two heating circuits exist cross-ventilation to exchange in casing simultaneously, have guaranteed like this temperature homogeneity in casing.
Used the wireless temperature survey sensor, this sensor internal has permanent magnet, can be adsorbed onto on insulator cap, and its temperature value is for being wirelessly transmitted to the casing outside, be convenient for measuring the temperature of each insulator cap, and can, with outside case inner high voltage outlet box, do not increased security.
Fig. 2 is the measure portion design frame chart, and wherein two switches of Kd and Kc are guaranteed insulator ground connection all the time in test, warranty test safety.
Fig. 3 is the holding circuit of design.
Fig. 4 is that insulator is arranged and the support Design block diagram.
Fig. 5 is the constant temperature oven principle schematic, utilizes air outlet and inlet scoop to guarantee temperature uniformity.
In concrete enforcement, by computing machine, control temperature constant and automatically measure insulator leakage current and institute's making alive, the computation migration quantity of electric charge, when the migration quantity of electric charge reached setting value, the automatic-prompting migration finished.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (8)
1. D.C. isolation daughter ion migration test equipment, comprise electric voltage regulator, high-tension transformer, rectifying and wave-filtering, constant temperature oven, industrial computer and surveying instrument, it is characterized in that, come to the power supply of test insulator by electric voltage regulator, high-tension transformer, rectifying and wave-filtering, guarantee to test by constant temperature oven and carry out in constant temperature, data acquisition by the Industrial Computer Control measuring circuit and add thermal information, surveying instrument adopts 5 Semi-digital multimeters, measuring voltage and current signals.
2. D.C. isolation daughter ion migration test equipment according to claim 1, is characterized in that, adopts the high-accuracy desk-top digital watch of 5 half, its testing current precision high sensitivity is 1nA, the voltage tester precision is accurate to 1 μ V, and measuring current reaches 10A, and test voltage reaches 1000V.
3. D.C. isolation daughter ion migration test equipment according to claim 1, it is characterized in that, adopt biswitch switched design in parallel, under normal ion transition state, the test loop switch opens, the migration circuit switching is closed, when needs are tested this road, first close the test loop switch, then open the migration circuit switching, guarantee like this in whole test handoff procedure without the ground connection disconnection, guarantee that test loop is not subjected to the impact of high voltage floating potential.
4. D.C. isolation daughter ion migration test equipment according to claim 1, is characterized in that, design series multistage high-tension resistive adds the holding circuit of TVS pipe, and in each road access port series connection one quick fuse pipe mode, protect.
5. D.C. isolation daughter ion migration test equipment according to claim 1, it is characterized in that, adopt the dual-surface stereo body structure, two fan clamshell doors are respectively arranged before and after casing, there are four layers of insulator rack on two sides, can place 28 insulators, in actual tests, two box body combinations, can place 56 insulators.
6. D.C. isolation daughter ion migration test equipment according to claim 1, it is characterized in that, insulator is placed horizontally on the insulation subrack of casing, this insulation subrack is divided into the cap headstock and steel foot rest, utilize the insulator deadweight to be fixed on the insulation subrack, need not any fixing operation, this insulation subrack can be stretched simultaneously, assurance can be positioned on this insulation subrack from the insulator of 70kN to 550kN, has guaranteed that test can cover all insulators.
7. D.C. isolation daughter ion migration test equipment according to claim 1, it is characterized in that, adopt the mode of two air channels convective heating, the casing low side has two air outlets, the wind direction of air outlet can be regulated by louver, two air draught wind-tunnel are arranged at casing top, the casing heating tube is positioned at the casing both sides, hot gas blows out from bottom half like this, the casing upper air blows out from bottom half after being sucked into heating furnace again, the casing both sides respectively form the air circuit of a heating, two heating circuits exist cross-ventilation to exchange in casing simultaneously, guaranteed like this temperature homogeneity in casing.
8. D.C. isolation daughter ion migration test equipment according to claim 1, it is characterized in that, use the wireless temperature survey sensor, this sensor internal has permanent magnet, can be adsorbed onto on insulator cap, and its temperature value is convenient for measuring the temperature of each insulator cap for being wirelessly transmitted to the casing outside, and can, with outside case inner high voltage outlet box, not increase security.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200034085U CN203287445U (en) | 2013-01-06 | 2013-01-06 | DC insulator ionic migration test equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200034085U CN203287445U (en) | 2013-01-06 | 2013-01-06 | DC insulator ionic migration test equipment |
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| CN203287445U true CN203287445U (en) | 2013-11-13 |
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| CN2013200034085U Expired - Lifetime CN203287445U (en) | 2013-01-06 | 2013-01-06 | DC insulator ionic migration test equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091577A (en) * | 2013-01-06 | 2013-05-08 | 中国电力科学研究院 | Direct current insulator ionic migration test equipment |
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2013
- 2013-01-06 CN CN2013200034085U patent/CN203287445U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091577A (en) * | 2013-01-06 | 2013-05-08 | 中国电力科学研究院 | Direct current insulator ionic migration test equipment |
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Granted publication date: 20131113 |
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| CX01 | Expiry of patent term |