CN204065330U - Transformer oil paper insulation test macro - Google Patents
Transformer oil paper insulation test macro Download PDFInfo
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- CN204065330U CN204065330U CN201420373243.5U CN201420373243U CN204065330U CN 204065330 U CN204065330 U CN 204065330U CN 201420373243 U CN201420373243 U CN 201420373243U CN 204065330 U CN204065330 U CN 204065330U
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Abstract
The utility model discloses a kind of transformer oil paper insulation test macro, comprises at least one test fuel tank, and the control and measure device be connected with described test fuel tank; Described test fuel tank comprises tubular casing, fills and be provided with transformer oil in described casing; Described casing one end is provided with housing plate, and its other end is provided with box bottom; The pole cup be connected with AC power is provided with, DC power supplier, transformer, air transporting arrangement in described casing, and well heater; Described pole cup, DC power supplier, transformer, air transporting arrangement and well heater are all connected with control and measure device.The working environment such as aerobic, temperature, electric field, metal, insulating material of simulation practical power transformer, particularly high-voltage dc environment, on-line continuous can be measured by transformer oil dielectric loss factor, whole process of the test automaticity is high, measuring process can realize automatically measuring and automatic data collection, and test figure is very accurate.
Description
Technical field
The utility model relates to power industry transformer maintenance technology field, particularly a kind of transformer oil paper insulation test macro.
Background technology
In electrical network conveying technology and engineering, power transformer and converter power transformer are the nucleus equipments of AC and DC transmission system, the safety and stability of the direct influential system of its running status.The safe reliability of transformer depends primarily on its insulating property, converter power transformer and power transformer are all adopt paper oil insulation structure, all to bear the effect of alternating voltage, lightning impulse voltage and switching overvoltage, and valve winding in converter transformer also bears the effect of direct current, DC stacked interchange and reversal of poles voltage, therefore as the transformer oil of predominating insulation in power transformer and converter power transformer, except requiring to possess except good electric property, the oxidation stability exchanged preferably or under DC electric field also should be possessed.
China is in early days in order to investigate the feasibility of Homemade Transformers oil commercial Application, manufacture and design transformer oil platform test device first, this test unit is made up of switch board and testing table two parts, this equipment is the bench test evaluating transformer oil anti-oxidative stability under AC field condition, vital role has been played in ultrahigh voltage transformer oil development process, but, have the following disadvantages with regard to current state of development: the antioxygenic property 1. can only evaluating transformer oil under AC field, can not evaluate under DC electric field; 2. electric field intensity is fixing can not adjust and electric field intensity is less; 3. the oxygen passed into, without distributing pipe, causes oxygen skewness in test oil sample, can not realize the uniform alumina of total Test oil sample; When 4. the acid number of transformer oil after oxidation being reached set quota, required time is as " oxidation life ", be not inconsistent with the operating condition of transformer oil as insulating oil, adopt this project not science, directly can not embody downtrending and the degree of transformer oil insulating property; Limited by technical merit at that time, automatic control level is low, and measuring process can not realize automatically measuring and automatic data collection.
Summary of the invention
Based on this, cannot carry out for above-mentioned the problem that in continuous and automatic measurement and oil sample, gas distribution inequality and electric field intensity cannot regulate under DC electric field environment, the utility model proposes a kind of transformer oil paper insulation test macro.
Its technical scheme is as follows:
A kind of transformer oil paper insulation test macro, comprises at least one test fuel tank, and the control and measure device be connected with described test fuel tank; Described test fuel tank comprises tubular casing, fills and be provided with transformer oil in described casing; Described casing one end is provided with housing plate, and its other end is provided with box bottom; Be provided with the pole cup be connected with AC power in described casing, described pole cup is fixed on housing plate; Be provided with DC power supplier in described casing, described DC power supplier is connected with AC power; Be provided with transformer in described casing, described transformer is connected with AC power, and described transformer is also connected with capacitor; Be provided with high voltage direct current field generator in described casing, described high voltage direct current field generator is connected with transformer and DC power supplier; The air transporting arrangement be connected with source of the gas is provided with in described casing, comprise the equal stringing of the annular gas be arranged on box bottom, the draft tube be connected with the equal stringing of described annular gas, described draft tube is fixed on described housing plate and is connected with source of the gas, and the equal stringing of described annular gas is provided with gas orifice; Also comprise the well heater contacting with casing and arrange, under this well heater is arranged on box bottom or be arranged in casing; Described pole cup, DC power supplier, transformer, air transporting arrangement and well heater are all connected with control and measure device.
By arranging the transformer of property parameter that is exposed, that have load in transformer oil, transformer oil is fully contacted with transformer, on the applied environment basis of the aerobic existed in the real work of analogue transformer oil, temperature, electric field, metal, insulating material, by technological means intensive test conditions, transformer oilpaper accelerated oxidation is reacted and rapid degradation, carry out the duty of simulated field transformer equipment, the experimental analysis undertaken by period measurement continuously and the dielectric dissipation factor Reliable Evaluating Methods of Their Performance recording each oil sample.The transformer that control and measure device controls to be positioned at test fuel tank has worked in the state of carrying, and realizes low voltage electric field.Transformer is the technological requirement by Large Oil immersion power transformer, the single transformer adopting cold-reduced silicon sheet and insulating material to make, and realizes the foundation of metal, insulating material environment in test fuel tank; DC electric field environment is realized by the DC power supplier in Control experiment fuel tank; By the equal stringing of the annular gas in Control experiment fuel tank, realize oxygen being uniformly distributed in test fuel tank, namely set up uniform aerobic environment; By controlling the well heater contacted with test fuel tank, realize the control of test ambient temperature in test fuel tank; Control and measure device continuously gathers the signal of the pole cup being positioned at test fuel tank by controlling electric bridge, realize the measurement of the dielectric dissipation factor to each aging oil sample, file.
Below its further technical scheme is described:
Preferably, described DC power supplier comprises cylindrical shell, is arranged at upper press cover and the lower cover at described cylindrical shell two ends respectively, and is arranged at the multiple silicon stack diodes in described cylindrical shell; Described lower cover is equipped with connection lambda line, described connection lambda line one end is connected with power supply and the other end is in parallel with the positive pole of multiple silicon stack diode; Be provided with electric capacity in described cylindrical shell, described electric capacity one end is connected with the negative pole of multiple silicon stack diode; The described electric capacity other end is connected with connection outlet, and described connection outlet is connected with high voltage direct current field generator through upper press cover; Described inner barrel is packaged with insulator, and described insulator is by multiple silicon stack diode and Capacitor apart.The DC power supplier be made up of high voltage silicon rectifier stack, high-voltage capacitance and outer insulator provides DC electric field environment for fuel tank, and high voltage silicon rectifier stack is in parallel forms semibridge system current rectifying and wave filtering circuit with high-voltage capacitance, is direct current signal the AC signal rectifying and wave-filtering inputted.
Preferably, described high voltage direct current field generator comprises electrode in high pressure external electrode and high pressure, and in described high pressure, electrode sleeve is located in high pressure external electrode, and described high pressure external electrode is connected with transformer, and in described high pressure, electrode is connected outlet connects with described; Fill between electrode in described high pressure external electrode and high pressure and establish transformer oil.By the high voltage direct current that DC power supplier produces, through this high voltage direct current field generator, in transformer oil, produce high-voltage dc, with simulated high-pressure DC electric field environment.
Preferably, described pole cup comprises interior electrode and external electrode, and described interior electrode sleeve is located in described external electrode, is formed with the electric gap of mistake holding transformer oil between described interior electrode and external electrode; Described external electrode one end is provided with insulation gland, and described insulation gland is provided with oil-in, and the other end of described external electrode is provided with oil-out, and the electric gap of described mistake is communicated with oil-out with described oil-in; Described interior electrode one end is provided with interior electrode extension, is provided with outstanding intracellular signaling termination in described interior electrode extension; Described insulation gland is provided with Signal connector, and described Signal connector is connected with intracellular signaling termination.AC signal is applied to external electrode, interior electrode exports measuring-signal by intracellular signaling termination, namely by measuring the difference of the interior AC signal of electrode and the phase place of standard signal, calculate the active power of different material and the ratio of reactive power between internal and external electrode, transformer oil dielectric loss factor can be drawn.And transformer oil constantly flows in the electric gap of mistake, continuously can realize measuring process.
Preferably, described external electrode inside is provided with inner sleeve, and described inner sleeve is connected with described interior electrode and the gland that insulate, and described oil-in is through described inner sleeve; Be provided with external electrode insulation sleeve between described external electrode and inner sleeve, described external electrode insulation sleeve abuts with the end face of described insulation gland; Be provided with interior electrode locating sleeve between described inner sleeve and interior electrode, described interior electrode extension is through described interior electrode locating sleeve.Carry out good insulated enclosure by the electrode locating sleeve of various insulation to pole cup, make measuring process accurate smoothly, also signal is isolated to external world simultaneously, avoids the interference of outer signals, makes Output rusults accurately and reliably.
Preferably, described transformer comprises signal input connector and signal output connector, described housing plate is provided with transformer input adapter and transformer out splice going splice, described signal input connector is connected with transformer input adapter, described transformer out splice going splice is connected with signal output connector, and described transformer input adapter is connected with AC power, transformer out splice going splice is connected with high-voltage capacitance.To transformer input exchange signal, the real use state of analogue transformer, makes test more accurately and reliably.
Preferably, be provided with the rectangular box be connected with housing plate in described casing, described transformer is installed in described rectangular box; Described rectangular box has relative bearing end and compresses end, and described bearing end is provided with two pieces of loading plates, and described compression end is provided with two pieces of pressure strips be connected with housing plate, and described transformer is arranged between described loading plate and pressure strip.Utilize rectangular box structure to carry out installation location to transformer, conveniently test.
Preferably, described control device comprises main control equipment, the PLC be connected with described main control equipment; The pressure regulator be connected with described PLC respectively, mass flow controller, well heater, fluid level controller, Dielectric Posts electric bridge controller; The high voltage ac/dc generator be connected with described pressure regulator, the flow sensor be connected with described mass flow controller, the temperature sensor be connected with described disc type heater, the liquid level sensor be connected with described fluid level controller, the Dielectric Posts electric bridge be connected with described medium consumption factor measuring bridge controller.Utilize various control instrument equipment, control each apparatus structure that test is measured, realize the robotization of process of the test, without the need to too much manual intervention, the accuracy of test findings is higher, and efficiency is also higher.
Preferably, described Dielectric Posts electric bridge is wirelessly connected with institute main control equipment.Utilize wireless mode to transmit test figure, without the need to line, make apparatus structure simple, test platform is built convenient.
The utility model has following outstanding advantage: can carry out accurate simulation to the applied environment of the aerobic existed in transformer oil real work, temperature, electric field, metal, insulating material, on-line automatic continuous coverage analysis can be realized, accuracy is high, and work efficiency is high; Particularly introduce DC electric field, because along with the development of technology, direct current electric transmission and transformation becomes trend, after introducing direct current, the otherness of insulating oil under DC electric field can better be distinguished.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of transformer oil paper insulation test macro in the utility model embodiment;
Fig. 2 is the schematic front view of the test fuel tank of transformer oil paper insulation test macro in the utility model embodiment;
Fig. 3 is the test fuel tank three-dimensional state schematic diagram for the moment of transformer oil paper insulation test macro in the utility model embodiment;
Schematic diagram when Fig. 4 is the test fuel tank three-dimensional state two of transformer oil paper insulation test macro in the utility model embodiment;
Fig. 5 is the test fuel tank decomposing state schematic diagram for the moment of transformer oil paper insulation test macro in the utility model embodiment;
Schematic diagram when Fig. 6 is the test fuel tank decomposing state two of transformer oil paper insulation test macro in the utility model embodiment;
Schematic diagram when Fig. 7 is the test fuel tank decomposing state three of transformer oil paper insulation test macro in the utility model embodiment;
Fig. 8 is the housing plate schematic diagram of the test fuel tank of transformer oil paper insulation test macro in the utility model embodiment;
Fig. 9 is the DC power supplier three-dimensional state schematic diagram for the moment of transformer oil paper insulation test macro in the utility model embodiment;
Schematic diagram when Figure 10 is the DC power supplier three-dimensional state two of transformer oil paper insulation test macro in the utility model embodiment;
Figure 11 is the cross-sectional schematic of the DC power supplier of transformer oil paper insulation test macro in the utility model embodiment;
Figure 12 is the three-dimensional perspective state schematic diagram for the moment of the DC power supplier of transformer oil paper insulation test macro in the utility model embodiment;
Schematic diagram when Figure 13 is the three-dimensional perspective state two of the DC power supplier of transformer oil paper insulation test macro in the utility model embodiment;
Figure 14 is the schematic front view of the pole cup of transformer oil paper insulation test macro in the utility model embodiment;
Figure 15 is the pole cup three-dimensional state schematic diagram for the moment of transformer oil paper insulation test macro in the utility model embodiment;
Schematic diagram when Figure 16 is the pole cup three-dimensional state two of transformer oil paper insulation test macro in the utility model embodiment;
Figure 17 is the cross-sectional schematic of the pole cup of transformer oil paper insulation test macro in the utility model embodiment;
Figure 18 is the decomposing schematic representation of the pole cup of transformer oil paper insulation test macro in the utility model embodiment;
Figure 19 is the schematic diagram of transformer oil paper insulation test macro control and measure device in the utility model embodiment.
Description of reference numerals:
100-tests fuel tank, 110-housing plate, 111-High-voltage electrode body, 112-oil pump, 113-gas source interface, 114-hanger, 115-oil filling orifice of fuel tank, 116-Signal connector, 117-variable-frequency power sources joint, 118a-transformer input adapter, 118b-transformer out splice going splice, 119a-temperature sensor, 119b-liquid level sensor, 120-casing, 130-box bottom, 132-earth stud, 200-transformer, 210-rectangular box, 212-pressure strip, 214-loading plate, 216-connecting link, 300-DC power supplier, 310-upper press cover, 312-joint pin, 320-cylindrical shell, 322-silicon stack diode, 324-electric capacity, 326-insulator, 327-cylindrical shell axis hole, 328-connects lambda line, 329-connects outlet, 330-lower cover, 332-lower cover axis hole, 400-pole cup, 410-external electrode, 412-oil-out, 414-external electrode insulation sleeve, 416-inner sleeve, electrode in 420-, electrode end cap in 421-, electrode locating sleeve in 422-, electrode extension in 424-, 426-intracellular signaling termination, 430-insulate gland, 432-oil-in, 440-radome, 442-contact, 444-power spring, 446-spring locating sleeve, 448-set nut, 450-crosses electric gap, 500-air transporting arrangement, the equal stringing of 510-annular gas, 520-draft tube, 600-control and measure device, 610-IPC computing machine, 612-high-tension electricity Measurement and analysis module, 614-gas flow measurement analysis module, 616-oil temperature Measurement and analysis module, 618-oil liquid level Measurement and analysis module, 619-Dielectric Posts analysis module, 620-PLC controller, 630-control module, 632-pressure regulator, 634-mass flow controller, 636-fluid level controller, 638-Dielectric Posts electric bridge controller, 642-high-voltage alternating generator, 644-Dielectric Posts electric bridge, 646-flow sensor, 700-well heater, 800-capacitor.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
As shown in Figures 1 to 8, a kind of transformer oil paper insulation test macro, comprises one or more test fuel tank 100 be set up in parallel, and the control and measure device 600 be all connected with all test fuel tanks 100.Be provided with transformer 200, pole cup 400, DC power supplier 300 and air transporting arrangement 500 in each test fuel tank 100, well heater 700 is also set at test tank bottoms, and these setting devices be all connected with control and measure device 600.In addition, also fill in test fuel tank 100 and be provided with transformer oil, these test units arranged in test fuel tank are soaked.
By arranging the transformer 200 of property parameter that is exposed, that have load in transformer oil, transformer oil is fully contacted with transformer 200, on the applied environment basis of the aerobic existed in the real work of analogue transformer oil, temperature, electric field, metal, insulating material, by technological means intensive test conditions, transformer oilpaper accelerated oxidation is reacted and rapid degradation, carry out the duty of simulated field transformer equipment, the experimental analysis undertaken by period measurement continuously and the dielectric dissipation factor Reliable Evaluating Methods of Their Performance recording each oil sample.The transformer 200 that control and measure device 600 controls to be positioned at test fuel tank has worked in the state of carrying, and realizes low voltage electric field.Transformer 200 is the technological requirements by Large Oil immersion power transformer, and the single transformer adopting cold-reduced silicon sheet and insulating material to make, realizes the foundation of metal in fuel tank, insulating material environment; DC electric field environment is realized by the DC power supplier 300 in Control experiment fuel tank; By the equal stringing 510 of the annular gas in Control experiment fuel tank, realize oxygen being uniformly distributed in fuel tank, namely set up uniform aerobic environment; By controlling the well heater 700 contacted with test fuel tank, realize the control of test ambient temperature in test fuel tank; Control and measure device 600 continuously gathers the signal of pole cup 400 output being positioned at test fuel tank by control medium loss factor measuring bridge 644, realize the measurement of the dielectric dissipation factor to each aging oil sample, file.
The test fuel tank 100 of this test macro, hold testing transformer 200 and transformer oil, the working environment such as aerobic, temperature, electric field, metal, insulating material of the experimental enviroment simulation practical power transformer 200 meeting testing requirements is provided, and provides hardware interface for the control of test parameters.This test fuel tank 100 comprises casing 120, and it is arranged to columniform tubular, also can be arranged to square cylinder or the irregular cylindrical shell of other polygons in addition, fill and be provided with transformer oil in casing 120.This casing 120 one end is provided with housing plate 110, and its other end is provided with box bottom 130.Be provided with rectangular box 210 in casing 120, transformer 200 is installed in this rectangular box 210.And this rectangular box 210 has relative bearing end and compresses end, its bearing end is provided with two pieces of loading plates 214, it compresses end and is provided with two pieces of pressure strips 212 be connected with housing plate 110, and transformer 200 is fixed between loading plate 214 and pressure strip 212.Use rectangular box to be fixed and clamped by transformer 200, transformer is reliably fixed, is convenient to test.
And casing 120 inside is provided with many connecting links 216, many connecting link 216 one end are connected with pressure strip 212, and its other end is connected with housing plate 110, for carrying out installation location to transformer 200.By connecting link 216, rectangular box is connected on housing plate 110, transformer 200 is fixed to casing locate near bottom, make it be immersed in the depths of transformer oil, test effect is better, carries out connecting the layout that can not affect miscellaneous part in addition with connecting link 216.
In addition, this box bottom 130 is also provided with the equal stringing 510 of annular gas that air transporting arrangement 500 is connected with source of the gas, the equal stringing of this annular gas 510 is evenly provided with numerous gas orifice (not shown)s, the draft tube 520 of housing plate 110 is provided through in casing, this draft tube 520 one end is connected with the equal stringing 510 of annular gas, the other end be arranged on test fuel tank 100 housing plate 110 on gas source interface 113 be connected, this gas source interface 113 is connected with source of the gas, also be connected with control and measure device 600 simultaneously, thus in casing, form air transporting arrangement 500, in the transformer oil in test tank body of oil tank 120, oxygen or air is inputted by this device, test oil is in aerobic environment.By the annular gas of bottom equal stringing 510, gas is discharged from bottom like this, then realize the Quick Oxidation to transformer oil from top to bottom.
In addition, the outward flange of housing plate 110 protrudes from the outward flange of casing 120, and the one side that can coordinate with casing 120 at housing plate 110 arranges annular protrusion, installs sealing both convenient.Housing plate 110 is provided with the variable-frequency power sources joint 117 be connected with AC power, this variable-frequency power sources joint 117 is connected with pole cup 400, this variable-frequency power sources joint 117 is also connected with control and measure device 600 simultaneously, make the AC signal that is applied on pole cup 400 adjustable by variable-frequency power sources joint 117, namely the simulate electric field applied is adjustable, more can press close to actual environment.Housing plate 110 is also provided with oil filling orifice of fuel tank 115, for refueling in test fuel tank 100; Also be provided with liquid level sensor 119b, for the oil mass in detection experiment fuel tank; Also be provided with temperature sensor 119a, for the temperature in Survey control test fuel tank, to meet testing requirements.And, housing plate 110 is also arranged symmetrically with two hangers 114, conveniently it has been lifted, also facilitate and test parts is set in casing 120.The outward flange of box bottom 130 also protrudes from the outward flange of casing 120, can arrange multiple earth stud 132, for ground connection in the surrounding of box bottom 130.
The transformer 200 arranged in casing 120, except the transformer body that siliconized plate and insulating material are formed, also comprise signal input connector and signal output connector (not shown), and on housing plate 110, be provided with transformer input adapter 118a and transformer out splice going splice 118b, this signal input connector is connected with transformer input adapter 118a, transformer out splice going splice 118b is connected with signal output connector, and transformer input adapter 118a is connected with 380V power supply, and transformer out splice going splice 118b is connected with capacitor 800, service condition that is virtually reality like reality is tested.To transformer 200 input exchange signal, simulation is actual uses situation, is convenient to test, and test is more accurately more tallied with the actual situation.
As shown in Fig. 9 to Figure 13, DC electric field evaluates indispensable factor in the oxidation characteristic of different transformer oil under DC electric field effect, utilizes the DC power supplier 300 arranged in test fuel tank 100 to produce DC electric field environment here.The DC power supplier 300 arranged in casing 120 comprises cylindrical shell 320, is arranged at upper press cover 310 and the lower cover 330 at cylindrical shell 320 two ends respectively, and is arranged at the multiple silicon stack diodes 322 in cylindrical shell 320.This lower cover 330 is provided with lower cover axis hole 332, in cylindrical shell 320, cylindrical shell axis hole 327 is also provided with by this lower cover axis hole 332, be equipped with in this cylindrical shell axis hole 327 and connect lambda line 328, this connection lambda line 328 one end is connected with power supply and the other end is connected with silicon stack diode 322 positive pole of multiple parallel connection.And, the electric capacity 324 of multiple series connection is also provided with in cylindrical shell 320, multiple electric capacity 324 one end is connected with the negative pole of multiple silicon stack diode 322, multiple electric capacity 324 other end is connected with and connects outlet 329, connects outlet 329 and is connected with high voltage direct current field generator (not shown) through upper press cover 310.Cylindrical shell 320 enclosed inside has insulator 326, and the material of this insulator 326 is teflon, and multiple silicon stack diode 322 and electric capacity 324 are isolated by insulator 326.
In one case, this DC power supplier 300 comprises three silicon stack diodes, 322, three silicon stack diodes 322 and is evenly arranged around the center line annular of described cylindrical shell 320.Multiple silicon stack diode is arranged ringwise, make each other evenly, influence each other little, little on the impact of insulator 326.In another case, this DC power supplier 300 comprises three silicon stack diodes, 322, three silicon stack diodes 322 and arranges around the center line of described cylindrical shell 320, and the rectangular triangle of the line of three silicon stack diodes 322.Rectangular triangle arranged by diode, and wiring connects easier, conveniently arranges electric capacity in centre.Preferred latter event, arranges convenient and simple herein, and these three silicon stack diodes in parallels.In addition, be provided with two in cylindrical shell 320 and connect with electric capacity 324, two electric capacity 324 of silicon stack Diode series, can electric capacity be expanded, avoid breakdown.
And upper press cover 310 is equipped with joint pin 312, joint pin one end is connected with electric capacity, and its other end is provided with the column cap that top is taper, this column cap end ground connection.Cylindrical shell 320 lower end is provided through the lower cover axis hole 332 of lower cover 330, this lower cover axis hole 332 forms drum shaft hole 327 along the axial direction indent of cylindrical shell, connect lambda line 328 and be arranged on this cylindrical shell axis hole 327 inside top, further reduced volume also under gravity, makes connection lambda line 328 and power supply be in the state contacted always.
Housing plate 110 is provided with High-voltage electrode body 111, and the joint pin 312 of DC power supplier 300 is connected with High-voltage electrode body 111, thus forms DC electric field in test fuel tank 100.Apply High AC voltage to DC power supplier 300 by High-voltage electrode body 111, and by DC power supplier 300, High Level AC Voltage is converted to high voltage direct current, thus apply high-voltage dc environment in test fuel tank 100.The connection lambda line 328 of this DC power supplier 300 is connected with the high-voltage alternating generator 642 be arranged on outside casing 120 by High-voltage electrode body 111, and high-voltage alternating generator 642 is connected with power supply, High Level AC Voltage is inputted to DC power supplier 300, passing through this DC power supplier 300 rectification is again direct current, convenient and simple.And this high-voltage alternating generator 642 is also connected with control and measure device 600, regulating and controlling can be carried out to input voltage.
This DC power supplier 300 mainly comprises cylindrical shell 320, and cylindrical shell 320 is used for carrying all elements, and cylindrical shell 320 has effective insulation function, can increase volume voltage breakdown and surface breakdown voltage; Connect with electric capacity 324 after being provided with 322, three silicon stack diode 322 parallel connections of three silicon stack diodes in cylindrical shell 320, like this, AC power forms direct supply after silicon stack diode 322 and electric capacity 324 again.In the whole remaining space of cylindrical shell 320, seal megohmite insulant up for safekeeping, after sealing up for safekeeping, significantly can improve the performance of insulation, make total reduce a lot, present 20cm can be shortened to by long for original 60cm, easy to use.
And be provided with high voltage direct current field generator (not shown) in casing 120, this high voltage direct current field generator is connected with transformer and DC power supplier 300.High voltage direct current field generator comprises electrode in high pressure external electrode and high pressure, and in high pressure, electrode sleeve is located in high pressure external electrode, and high pressure external electrode is connected with transformer, and high pressure external electrode is directly fixed on transformer 200, and the iron core of transformer 200 connects the earth; In addition, in high pressure electrode be connected outlet 329 and connect; Fill between electrode in high pressure external electrode and high pressure and establish transformer oil.By the high voltage direct current that DC power supplier 300 produces, then pass through this high voltage direct current field generator, in transformer oil, produce high-voltage dc, with simulated high-pressure DC electric field environment.
As shown in Figure 14 to Figure 18, measuring transformer oil dielectric loss factor is the important indicator detecting transformer oil quality, needs to carry out continuous automatic measurement with Dielectric Posts pole cup 400 herein.This pole cup 400 is arranged in casing 120, and comprise interior electrode 420 and the external electrode 410 of tubular, interior electrode 420 is sheathed in external electrode 410, and forms electric gap 450 between interior electrode 420 and external electrode 410, and this is crossed in electric gap 450 to fill and establishes transformer oil; This external electrode 410 one end is provided with insulation gland 430, and this insulation gland 430 is provided with oil-in 432, and the other end of external electrode 410 is provided with outstanding oil-out 412, crosses electric gap 450 and is communicated with oil-out 412 with oil-in 432; Interior electrode 420 one end has interior electrode end cap 421, this interior electrode tip covers the interior electrode extension 424 being provided with hollow cylindrical, intracellular signaling termination 426 is provided with in interior electrode extension 424, and Signal connector 116 is connected to insulation gland 430, Signal connector 116 is connected with intracellular signaling termination 426, and Signal connector 116 is connected with control and measure device 600, thus send the information on interior electrode 420 to control and measure device 600 by intracellular signaling termination 426, the automatic collection analysis of signal can be realized.
This external electrode 410 inside is provided with inner sleeve 416, and this inner sleeve 416 is connected with interior electrode 410 and the gland 430 that insulate, and oil-in 432 is through inner sleeve; Be provided with external electrode insulation sleeve 414 between external electrode 410 and inner sleeve 416, this external electrode insulation sleeve 414 abuts with the end face of insulation gland 430; Be provided with interior electrode locating sleeve 422 between inner sleeve 416 and interior electrode 420, interior electrode extension 424 is through interior electrode locating sleeve 422.Carry out good insulated enclosure by the electrode locating sleeve of various insulation to pole cup 400, also signal is isolated to external world simultaneously, avoids the interference of outer signals, makes Output rusults accurately and reliably, make measuring process accurate smoothly.And the middle part of inner sleeve 416 is provided with a stepped hole, intracellular signaling termination 426 is through stepped hole, and stepped hole lower end abuts with interior electrode locating sleeve 422.Arrange stepped hole, seal better to internal and external electrode, inner electrode extension 424 and interior electrode locating sleeve 422 position sealing.Interior electrode extension 424 is outer is also provided with set nut 448, and it is inner and contact with stepped hole that this set nut 448 is positioned at radome 440, installs set nut 448 in stepped hole upper end, is used for tractive fixed signal to conduct termination 426.
Interior electrode extension 424 upper end is also provided with power spring 444, and the contact 442 to be connected with power spring 444 one end, power spring 444 other end is connected with intracellular signaling termination 426, contact 442 is connected with Signal connector 116, and be also arranged with a spring locating sleeve 446 in the outside of power spring 444 and contact 442, one end that contact 442 is connected with power spring 444 is fastened in this spring locating sleeve 446, one end that contact 442 is connected with Signal connector 116 is stretched out outside this locating sleeve, this locating sleeve is used for positioning power spring 444 and contact 442, also shielding action can be played to signal.Press Signal connector 116 during work, can be oppressed it move downward along spring locating sleeve 446 internal direction with contact close contact, contact more closely with power spring 444, power spring 444 is contacted with intracellular signaling termination 426, facilitates the output of signal.Be arranged with tubular radome 440 outside interior electrode extension 424, this radome 440 is arranged in insulation gland 430, can prevent the interference of outer signals; One end of Signal connector 116 is connected in one end of radome 440, and radome 440 other end abuts with inner sleeve 416.Utilize radome 440 pairs of signal deferent segments to shield, avoid outer signals to the interference of measuring output signal, ensure that the accuracy of measurement.
And oil pump 112 is connected with on housing plate 110, oil pump 112 one end is immersed in the transformer oil of casing 120 inside, and this oil pump 112 submerged end is provided with inlet port and oil drain out (not shown), its inlet port is connected by the oil-out 412 of oil pipe with interior electrode 420, and, this oil pump 112 is connected with motor, and motor carries out connection control by control and measure device 600 again.By oil pump 112 from the oil-out 412 of pole cup 400 constantly aspirate test oil and discharge from oil pump 112 oil drain out, oil in casing 120 is just continuous to be entered the electric gap 450 of mistake of pole cup 400 from oil-in 432, oil is constantly circulated in pole cup 400, thus can realize carrying out Automatic continuous measurement to oil, and need not ceaselessly change oil to pole cup and extract oil sample.
Pole cup 400 is made up of external electrode 410, interior electrode 420 etc., and this interior electrode 420 and external electrode 410 are configured to two pole plates of cylinder electric capacity, has various test oil between internal and external electrode; AC signal is applied to external electrode 410, the difference of the AC signal of electrode 420 and the phase place of standard signal in measuring, draw the active power of material and the ratio of reactive power between internal and external electrode by Computing, thus correctly test out transformer oil dielectric loss factor.
As shown in figure 19, above-mentioned various devices all need control and measure device to carry out control monitoring analysis, and this control and measure device 600 comprises main control equipment, and this main control equipment comprises IPC formula computing machine 610, and the PLC 620 be connected with main control equipment 610.The control module 630 be connected with PLC 620 respectively.This control module 630 comprises pressure regulator 632, the high-voltage alternating generator 642 be connected with pressure regulator 632, for regulation voltage, high-voltage alternating generator 642 is connected with aforesaid High-voltage electrode body 111, High-voltage electrode body 111 is connected with DC power supplier 300, the intensity of DC electric field finally can be regulated, to adapt to different electric field conditions by pressure regulator 632; Also comprise the mass flow controller 634 be arranged on outside housing plate 110, and to flow sensor 646 (not shown) tested the draft tube 520 of ventilating in fuel tank and be connected, for the air inflow in Control experiment fuel tank; Also comprise well heater 700, the temperature sensor 119a be connected with well heater 700, this well heater 700 can be the disc type heater below the box bottom 130 being arranged on test fuel tank 100, also can be the well heater being arranged on casing 120 inside of other types, for the temperature in regulating and controlling casing 120; Also comprising fluid level controller 636, the liquid level sensor 119b be connected with fluid level controller 636, namely controlling the number of the transformer oil added for controlling liquid level in casing 120; Also comprise Dielectric Posts electric bridge controller 638, the Dielectric Posts electric bridge 644 be connected with medium consumption factor measuring bridge controller 638, this electric bridge is connected with the Signal connector 116 of pole cup 400, carries out Measurement and analysis to the signal that pole cup 400 exports.By main control equipment and PLC, control each subordinate's control module, each subordinate control module controls concrete measuring equipment equipment, can the status information of apparatus accordingly regulate, the status information of each apparatus can feed back to PLC 620 and main control equipment simultaneously, regulate further, with Pass Test demand.Whole test adjustment process is automatically carried out under the effect of this control and measure device, can realize data automatic measuring and automatic data collection.
And, be arranged on temperature sensor 119a, the liquid level sensor 119b tested on fuel tank, flow sensor 646 is connected with computer radio.Use radio connection to carry out transmission test data, make the wiring of device simple.Dielectric Posts electric bridge 644 herein is also wirelessly connected with main control equipment, and namely electric bridge adopts wireless mode to be analyzed to main control equipment by signal transmission.In addition, test fuel tank 100 is also provided with liquid-filling valve (not shown), and liquid-filling valve is connected with PLC 620, by controlling the aperture of liquid-filling valve, can control the speed of fluid injection in test fuel tank 100.Main control equipment has high-tension electricity and controls analysis module 612, gas flow control analysis module 614, oil temperature control analysis module 616, oil liquid level control analysis module 618, and Dielectric Posts module 619, corresponding with above-mentioned appliance arrangement.By computing machine, control device is controlled, there is the advantage that automaticity is high, control well; Measuring process can realize automatically measuring and automatic data collection, and test figure is very accurate.
The above embodiment only have expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (9)
1. a transformer oil paper insulation test macro, is characterized in that, comprises at least one test fuel tank, and the control and measure device be connected with described test fuel tank;
Described test fuel tank comprises tubular casing, fills and be provided with transformer oil in described casing; Described casing one end is provided with housing plate, and its other end is provided with box bottom;
Be provided with the pole cup be connected with AC power in described casing, described pole cup is fixed on housing plate; Be provided with DC power supplier in described casing, described DC power supplier is connected with AC power; Be provided with transformer in described casing, described transformer is connected with AC power, and described transformer is also connected with capacitor; Be provided with high voltage direct current field generator in described casing, described high voltage direct current field generator is connected with transformer and DC power supplier;
The air transporting arrangement be connected with source of the gas is provided with in described casing, comprise the equal stringing of the annular gas be arranged on box bottom, the draft tube be connected with the equal stringing of described annular gas, described draft tube is fixed on described housing plate and is connected with source of the gas, and the equal stringing of described annular gas is provided with gas orifice;
Also comprise the well heater contacting with casing and arrange, under this well heater is arranged on box bottom or be arranged in casing;
Described pole cup, DC power supplier, transformer, air transporting arrangement and well heater are all connected with control and measure device.
2. transformer oil paper insulation test macro according to claim 1, it is characterized in that, described DC power supplier comprises cylindrical shell, is arranged at upper press cover and the lower cover at described cylindrical shell two ends respectively, and is arranged at the multiple silicon stack diodes in described cylindrical shell;
Described lower cover is equipped with connection lambda line, described connection lambda line one end is connected with power supply and the other end is in parallel with the positive pole of multiple silicon stack diode;
Be provided with electric capacity in described cylindrical shell, described electric capacity one end is connected with the negative pole of multiple silicon stack diode; The described electric capacity other end is connected with connection outlet, and described connection outlet is connected with high voltage direct current field generator through upper press cover;
Described inner barrel is packaged with insulator, and described insulator is by multiple silicon stack diode and Capacitor apart.
3. transformer oil paper insulation test macro according to claim 2, it is characterized in that, described high voltage direct current field generator comprises electrode in high pressure external electrode and high pressure, in described high pressure, electrode sleeve is located in high pressure external electrode, described high pressure external electrode is connected with transformer, and in described high pressure, electrode is connected outlet connects with described; Fill between electrode in described high pressure external electrode and high pressure and establish transformer oil.
4. transformer oil paper insulation test macro according to claim 1, it is characterized in that, described pole cup comprises interior electrode and external electrode, and described interior electrode sleeve is located in described external electrode, is formed with the electric gap of mistake holding transformer oil between described interior electrode and external electrode;
Described external electrode one end is provided with insulation gland, and described insulation gland is provided with oil-in, and the other end of described external electrode is provided with oil-out, and the electric gap of described mistake is communicated with oil-out with described oil-in; Described interior electrode one end is provided with interior electrode extension, is provided with intracellular signaling termination in described interior electrode extension;
Described insulation gland is provided with Signal connector, and described Signal connector is connected with intracellular signaling termination.
5. transformer oil paper insulation test macro according to claim 4, is characterized in that, described external electrode inside is provided with inner sleeve, and described inner sleeve is connected with described interior electrode and the gland that insulate, and described oil-in is through described inner sleeve;
Be provided with external electrode insulation sleeve between described external electrode and inner sleeve, described external electrode insulation sleeve abuts with the end face of described insulation gland; Be provided with interior electrode locating sleeve between described inner sleeve and interior electrode, described interior electrode extension is through described interior electrode locating sleeve.
6. transformer oil paper insulation test macro according to claim 1, it is characterized in that, described transformer comprises signal input connector and signal output connector, described housing plate is provided with transformer input adapter and transformer out splice going splice, described signal input connector is connected with transformer input adapter, described transformer out splice going splice is connected with signal output connector, and described transformer input adapter is connected with AC power, and transformer out splice going splice is connected with high-voltage capacitance.
7. transformer oil paper insulation test macro according to claim 1, is characterized in that, be provided with the rectangular box be connected with housing plate in described casing, and described transformer is installed in described rectangular box;
Described rectangular box has relative bearing end and compresses end, and described bearing end is provided with two pieces of loading plates, and described compression end is provided with two pieces of pressure strips be connected with housing plate, and described transformer is arranged between described loading plate and pressure strip.
8. the transformer oil paper insulation test macro according to claim 1-7 any one, it is characterized in that, described control and measure device comprises main control equipment, the PLC be connected with described main control equipment;
The pressure regulator be connected with described PLC respectively, mass flow controller, well heater, fluid level controller, Dielectric Posts electric bridge controller;
The high voltage ac/dc generator be connected with described pressure regulator, the flow sensor be connected with described mass flow controller, the temperature sensor be connected with described well heater, the liquid level sensor be connected with described fluid level controller, the Dielectric Posts electric bridge be connected with described medium consumption factor measuring bridge controller.
9. transformer oil paper insulation test macro according to claim 8, is characterized in that, described Dielectric Posts electric bridge is wirelessly connected with institute main control equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373243.5U CN204065330U (en) | 2014-07-07 | 2014-07-07 | Transformer oil paper insulation test macro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373243.5U CN204065330U (en) | 2014-07-07 | 2014-07-07 | Transformer oil paper insulation test macro |
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| Publication Number | Publication Date |
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| CN204065330U true CN204065330U (en) | 2014-12-31 |
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| CN201420373243.5U Withdrawn - After Issue CN204065330U (en) | 2014-07-07 | 2014-07-07 | Transformer oil paper insulation test macro |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133165B (en) * | 2014-07-07 | 2017-05-31 | 广东电网有限责任公司电力科学研究院 | Transformer oil paper insulation test system |
| CN109375075A (en) * | 2018-11-22 | 2019-02-22 | 西南交通大学 | A kind of High-Voltage Experimentation bracket of for transformer paper oil insulation test |
| CN112578242A (en) * | 2020-12-07 | 2021-03-30 | 国网北京市电力公司 | Method and system for determining breakdown voltage of transformer oil paper insulation system |
-
2014
- 2014-07-07 CN CN201420373243.5U patent/CN204065330U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133165B (en) * | 2014-07-07 | 2017-05-31 | 广东电网有限责任公司电力科学研究院 | Transformer oil paper insulation test system |
| CN109375075A (en) * | 2018-11-22 | 2019-02-22 | 西南交通大学 | A kind of High-Voltage Experimentation bracket of for transformer paper oil insulation test |
| CN112578242A (en) * | 2020-12-07 | 2021-03-30 | 国网北京市电力公司 | Method and system for determining breakdown voltage of transformer oil paper insulation system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |
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| CP01 | Change in the name or title of a patent holder | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20170531 |
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| AV01 | Patent right actively abandoned |