CN106249065A - A kind of analogue measurement device - Google Patents

A kind of analogue measurement device Download PDF

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Publication number
CN106249065A
CN106249065A CN201610621926.1A CN201610621926A CN106249065A CN 106249065 A CN106249065 A CN 106249065A CN 201610621926 A CN201610621926 A CN 201610621926A CN 106249065 A CN106249065 A CN 106249065A
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China
Prior art keywords
fuel tank
analogue measurement
oil stream
transformer
measurement device
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CN201610621926.1A
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Chinese (zh)
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CN106249065B (en
Inventor
刘道生
王仕会
刘飞飞
林飞
刘宁
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Jiangxi University of Science and Technology
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Jiangxi University of Science and Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/24Arrangements for measuring quantities of charge

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

The present invention provides a kind of analogue measurement device, for analogue measurement oil flow electrified degree of transformer.Described analogue measurement device includes the analog of the running environment for simulating described transformator, and for measuring the detection device of the oil flow electrified degree of transformer in described running environment.Described analog includes the first fuel tank, the second fuel tank and connects described first fuel tank and the first connecting tube of the second fuel tank and the second connecting tube, and described first fuel tank, the first connecting tube, the second fuel tank and the second connecting tube form a closed path.It is provided with insulating cylinder and copper cash described in insulating cylinder, copper cash and described transformer oil stream in described first fuel tank and is soaked in described transformer oil stream.Described detection device includes the pico-ampere table tested electrode and be electrically connected with described test electrode, and described pico-ampere table is for measuring the oil flow electrified degree of transformer in described running environment to obtain current signal.

Description

A kind of analogue measurement device
Technical field
The present invention relates to signal detection field, for body, relate to a kind of analogue measurement device.
Background technology
At present, domestic and international power transformer manufacturing firm, for saving manufacturing cost, generally uses and improves transformer oil stream stream The mode of speed accelerates distributing of transformator heat, to reduce the area of radiator.But the increase of transformer oil stream flow velocity causes Friction stree between transformer oil stream and insulating board increases, thus causes transformer oil stream and insulating board bipolar electrode layer Electric charge produces and separates so that transformer oil flows out existing positive charge, has had a strong impact on the operation of transformator.Transformer oil stream to be reduced The impact that transformator is run by electrified degree, it is necessary to first measure operating transformer oil stream, to identify different oil stream stream The electrified degree of the lower transformer oil stream of speed.But in the various on-Line Monitor Device of existing transformator, not to transformer oil stream band The device that electric degree is monitored.The real time execution work of analogue transformer is not had when existing transformer monitoring device is monitored yet Condition so that the data detected and the data deviation in actual motion.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of analogue measurement device, it is possible in the feelings of transformator not power-off The electrified degree of described transformer oil stream is monitored under condition.
To achieve these goals, the embodiment of the present invention adopts the following technical scheme that
A kind of analogue measurement device, for analogue measurement oil flow electrified degree of transformer, described analogue measurement device includes using In the analog of the running environment simulating described transformator, and for measuring the transformer oil stream band in described running environment The detection device of electric degree;
Described analog includes the first fuel tank, the second fuel tank and connects described first fuel tank and the first of the second fuel tank Connecting tube and the second connecting tube, so that described first fuel tank, the first connecting tube, the second fuel tank and the second connecting tube form a circulation System;Being provided with insulating cylinder, copper cash and described transformer oil stream in described first fuel tank, described insulating cylinder and copper cash are soaked in institute State transformer oil stream;Described detection device includes the pico-ampere table tested electrode and be electrically connected with described test electrode, described skin Peace table is for measuring the oil flow electrified degree of transformer in described running environment to obtain current signal.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described first fuel tank is additionally provided with Temperature-detecting device and heater, described temperature-detecting device for detecting the temperature of described transformer oil, described in add hot charging Put for described transformer oil is heated.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described temperature-detecting device is arranged In the sidewall of described first fuel tank, described heater is arranged at described first tank bottoms.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the bottom of described heater and The bottom of the second fuel tank is respectively arranged with insulation spacer.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described first connecting tube and described Second connecting tube is provided with flow control valve, and described first connecting tube is additionally provided with the stream for detecting described transformer oil stream The effusion meter measured and the variable pump being used for regulating the flow velocity of described transformer oil stream.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described insulating cylinder is exhausted by high density Edge cardboard is made, and described insulating cylinder includes insulate inner core and insulation urceolus, and described insulation inner core is provided with electrode in Copper Foil, described Insulation urceolus is provided with Copper Foil external electrode.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described insulating cylinder, copper cash and transformation The part by weight of device oil is respectively 5%, 35% and 60%.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described detection device includes two Described test electrode, the end of two described test electrodes is respectively arranged with current sensor probe, and described current sensor is visited Head is apart from described transformer oil stream 1 millimeter to 3 millimeters;Described pico-ampere table ground connection, and be electrically connected with two described test electrodes.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, described first fuel tank, the second fuel tank It is respectively equipped with electrostatic screen layer with pico-ampere off-balancesheet.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the measurement scope of described pico-ampere table For: 20aA~20mA, internal resistance is less than or equal to 1G Ω, and response speed is that every 1kV is less than 3 milliseconds.
The analogue measurement device that the present invention provides includes analog and detection device, and wherein, described analog passes through First fuel tank, the second fuel tank, connect the first fuel tank and the first connecting tube of the second fuel tank and the second connecting tube, transformer oil stream with And it being soaked in the insulating cylinder of described transformer oil stream and copper cash simulates the running environment of described transformator, described detection device passes through Oil flow electrified degree of transformer is measured by pico-ampere table and test electrode.By above-mentioned setting, described analogue measurement device can Situation in transformator not power-off measures described oil flow electrified degree of transformer.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this A little accompanying drawings obtain other relevant accompanying drawings.
The structural representation of a kind of analog that Fig. 1 provides for the embodiment of the present invention.
The structural representation of a kind of insulating cylinder that Fig. 2 provides for the embodiment of the present invention.
A kind of connection block diagram detecting device that Fig. 3 provides for the embodiment of the present invention.
A kind of structural representation detecting device that Fig. 4 provides for the embodiment of the present invention.
Reference:
100-analog;
110-the first fuel tank;
111-insulating cylinder, 1111-insulate inner core, and 1112-insulate urceolus, electrode in 1113-Copper Foil, 1114-Copper Foil dispatch from foreign news agency Pole;
112-temperature-detecting device, 113-heater;
120-the second fuel tank;
130-the first connecting tube, 131-effusion meter, 132-variable pump;
140 second connecting tubes, 150-insulation spacer, 160-flow control valve;
200-detects device, 210-pico-ampere table, and 220-tests electrode, 230-current sensor probe.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention rather than whole embodiments.Generally implement with the present invention illustrated described in accompanying drawing herein The assembly of example can be arranged with various different configurations and design.
Therefore, detailed description to the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed below The scope of the present invention, but be merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, this area is common The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the model of present invention protection Enclose.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.
The embodiment of the present invention provides a kind of analogue measurement device, for analogue measurement oil flow electrified degree of transformer.According to reality Border demand, described transformator can be forced oil stream circulating air cooling transformator, because the oil stream stream of forced oil stream air-cooled transformer Speed is bigger, it is easier to cause electrostatic occur in oil stream.Wherein, described analogue measurement device includes for simulating described transformator The analog of running environment, and for measuring the detection device of the oil flow electrified degree of transformer in described running environment.
The analog 100 that Fig. 1 provides for the embodiment of the present invention.As it is shown in figure 1, described analog 100 includes first Fuel tank the 110, second fuel tank 120 and connect described first fuel tank 110 and the first connecting tube 130 and second of the second fuel tank 120 Connecting tube 140.Insulating cylinder 111, copper cash and described transformer oil stream, described insulating cylinder 111 it is provided with in described first fuel tank 110 It is soaked in described transformer oil stream with copper cash.Described insulating cylinder 111 for analogue transformer high pressure winding and low pressure winding it Between main leakage sky road, described copper cash be used for analogue transformer coil.Described transformer oil stream can be through vacuum drying, at mark Under quasi-gap, its pressure voltage can be more than or equal to 65kV.
Wherein, the first connecting tube 130 is connected to described first fuel tank 110 and the upper end of the second fuel tank 120, the second connecting tube 140 are connected on the sidewall that described first fuel tank 110 is relative with the second fuel tank 120 near described first fuel tank 110 and the second oil The position of case 120 bottom.Above-mentioned setting makes described first fuel tank the 110, first connecting tube the 130, second fuel tank 120 and second connect Adapter 140 forms a closed path, and described transformer oil stream can circulate in described closed path.Alternatively, first It is provided with insulation spacer 150 so that described first fuel tank 110 and the second fuel tank 120 are exhausted bottom fuel tank 110 and the second fuel tank 120 Edge.Alternatively, described insulation spacer 150 can be made up of politef.
Alternatively, described first connecting tube 130 and the second connecting tube 140 are provided with flow control valve 160, implement Time, described flow control valve 160 is opened and can make to connect between described first fuel tank 110 and the second fuel tank 120 to be formed Described closed path.According to the actual requirements, described first connecting tube 130 is also provided with effusion meter 131 and variable pump 132. Described effusion meter 131 is for measuring the flow of described transformer oil stream, and described variable pump 132 is used for regulating described transformer oil stream Flow velocity.Wherein, the flow rate regulation of described variable pump 132 may range from 0~7m/s or 0~150L/min, and caliber can be 20 millimeters.
It should be noted that the flow value that the current flow of described transformer oil stream can record according to described effusion meter 131 Calculate, during enforcement, according to the current flow calculated, described analog 100 can be monitored, adjust transformation at any time Device oil stream flow velocity is so that it levels off to the flow velocity of the transformer oil stream under actual motion environment.
Alternatively, described first fuel tank 110 is also provided with temperature-detecting device 112 and heater 113.According to reality Border demand, described temperature-detecting device 112 can be arranged at the sidewall of described first fuel tank 110, in order to measure described first oil The temperature of the transformer oil stream in case 110, to realize the real-time monitoring to described transformer oil stream temperature.Described heater Between 113 bottom and the described insulation spacers 150 being arranged at described first fuel tank 110, the most described insulation spacer 150 is arranged at institute State the bottom of heater 113.When described temperature-detecting device 112 shows that described transformer oil stream temperature is too low, described in add Thermal 113 is for heating the transformer oil stream in described first fuel tank 110.Transformator after heating, in the first fuel tank 110 Oil stream and the transformer oil in the second fuel tank 120 flow out existing temperature gap, so that described transformer oil stream is along described closed path Circulate.The real running environment of described transformator can be simulated by above-mentioned setting.
The generalized section of a kind of insulating cylinder 111 that Fig. 2 provides for the embodiment of the present invention.As in figure 2 it is shown, alternatively, institute State insulating cylinder 111 and include insulate inner core 1111 and insulation urceolus 1112.Described insulation inner core 1111 is provided with electrode in Copper Foil 1113, described insulation urceolus 1112 is provided with Copper Foil external electrode 1114.It should be noted that electrode 1113 and copper in described Copper Foil The position that specifically arranges of paper tinsel external electrode 1114 does not limits, if not with the ends contact of described insulating cylinder 111.Preferably Ground, in described Copper Foil, electrode 1113 and Copper Foil external electrode 1114 can be pasted on the centre position of described insulating cylinder 111.
Alternatively, described insulating cylinder 111 is made up of high density insulating board, and described high density insulating board is resistivity The paper insulating material high, conductive capability is low, described high density insulating board can be through the vacuum drying of more than 48 hours.Institute State insulating cylinder 111 to match with transformer oil stream and check insulation system as described strong circulation of oil flow air-cooled transformer.Insulation The part by weight of cardboard, copper cash and transformer oil stream also has certain impact to the oil flow electrified degree of transformer in running status, excellent Selection of land, the part by weight of above-mentioned insulating cylinder 111 i.e. high density insulating board, copper cash and transformer oil stream can be respectively 5%, 35% and 60%, but it is not limited to this.
As shown in Figure 3, Figure 4, described detection device 200 includes pico-ampere table 210, test electrode 220 and is arranged at described survey The current sensor probe 230230 of examination electrode 220, described pico-ampere table 210 is used for measuring described oil flow electrified degree of transformer.Institute State current sensor probe 230 to be electrically connected with described test electrode 220, described test electrode 220 and described pico-ampere table 210 electricity Property connect.Alternatively, described test electrode 220 can be electrically connected with described pico-ampere table 210 by coaxial cable.Described electric current Sensor probe 230 can be non-contact optical probe, and during enforcement, described current sensor probe 230 is apart from described transformer oil Flow 1 millimeter and can sense current signal to 3 millimeters.Specifically, described current sensor probe 230 can include Hall element And iron core, described Hall element is arranged at the gap of described iron core as field sensing component.Alternatively, described current sensor The tolerable temperature of probe 230 can be 0~40 DEG C, and humidity range can be 90%.
During enforcement, pico-ampere table 210 is by being arranged at current sensor probe 230 and the transformator of described test electrode 220 Oil stream is electrically connected with.After described transformer oil stream is stable, the oil in described first fuel tank 110 and the second fuel tank 120 is equipotentiality body, Producing potential difference with the earth, described potential difference acts on formation one small current signal in the big internal resistance of described pico-ampere table 210.
Alternatively, the noise of described pico-ampere table 210 can be less than 1fA, measures and may range from 20aA~20mA, its internal resistance Can be more than or equal to 1G Ω, response speed can be that every 1kV is less than 3 milliseconds.According to foregoing, described pico-ampere table 210 can To select The Model 6514.It should be noted that described pico-ampere table 210 can be electrically connected with host computer, in order to examining The described current signal transfer measured carries out data analysis to host computer, obtains different oil stream flow velocity and oil flow electrified degree of transformer Between relation, and according to described relation, transformator is improved.
According to the actual requirements, alternatively, described first fuel tank the 110, second fuel tank 120, pico-ampere table 210 and coaxial cable Electrostatic screen layer can also be respectively arranged with outward, extraneous to tiny current measurement generation interference to prevent.
The operation principle of the analogue measurement device that the embodiment of the present invention provides is: simulate transformation by analog 100 The running environment of device, detects the oil flow electrified degree of transformer in described running environment by detection device 200.Wherein, insulation The cylinder 111 main leakage sky road between high pressure winding and the low pressure winding of analogue transformer.Temperature-detecting device 112 and heating Device 113 is for the temperature of the described transformer oil stream of monitoring and control in real time, so that the temperature of described transformer oil stream reaches true Temperature under real running environment.Effusion meter 131 and variable pump 132 are used for monitoring in real time and regulating the stream of described transformer oil stream Speed, the flow velocity of the transformer oil stream to be close under true running status.Under the constantly flowing of transformer oil stream, described change Depressor oil stream rubs with the i.e. high density insulating board of insulating cylinder 111 so that form the wooden of described high density insulating board Electron cloud in element offsets so that the anion in described transformer oil stream is adsorbed in insulating cylinder 111, remaining positive charge Flow with described transformer oil stream.Described detection device 200 passes through pico-ampere table 210, is electrically connected at the survey of described pico-ampere table 210 Try electrode 220 and be arranged at the current sensor probe 230 of described test electrode 220 to detect described transformator oil flow electrification Degree is to obtain current signal.Wherein, pico-ampere table 210 one end ground connection, the other end is by test electrode 220 and current sensor probe 230 are electrically connected with described transformer oil stream, and described transformer oil stream is equipotentiality body, forms a potential difference, institute between the earth State potential difference to act on the big internal resistance of pico-ampere table 210 and form a small current signal.
In sum, the analogue measurement device that the embodiment of the present invention provides is real by the real running environment of analogue transformer Show test oil flow electrified degree of transformer in the case of transformator not power-off.Measurement data by described analogue measurement device The different in flow rate impact on its electrified degree of transformer oil stream can be analyzed, thus optimize the insulation of transformator targetedly Structure.Can also measure on the basis of above-mentioned analog 100 other oil index data with the research and development of auxiliary transformer and Manufacture.
In describing the invention, it should be noted that term " on ", D score, " interior ", the orientation of the instruction such as " outward " or position Relation of putting is for based on orientation shown in the drawings or position relationship, or the orientation usually put when this invention product uses or position Put relation, be for only for ease of the description present invention and simplify description rather than instruction or imply that the device of indication or element are necessary There is specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In describing the invention, in addition it is also necessary to explanation, term " is arranged ", " being connected ", " connection " should be interpreted broadly, Connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected;Can be to be mechanically connected, it is also possible to be electricity Connect;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For For those of ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. an analogue measurement device, for analogue measurement oil flow electrified degree of transformer, it is characterised in that described analogue measurement fills Put the analog including the running environment for simulating described transformator, and for measuring the transformation in described running environment The detection device of device oil flow electrification degree;
Described analog includes the first fuel tank, the second fuel tank and connects the first connection of described first fuel tank and the second fuel tank Pipe and the second connecting tube, described first fuel tank, the first connecting tube, the second fuel tank and the second connecting tube form a closed path;Institute Being provided with insulating cylinder, copper cash and described transformer oil stream in stating the first fuel tank, described insulating cylinder and copper cash are soaked in described transformation Device oil stream;Described detection device includes the pico-ampere table tested electrode and be electrically connected with described test electrode, and described pico-ampere table is used Oil flow electrified degree of transformer in measuring described running environment is to obtain current signal.
Analogue measurement device the most according to claim 1, it is characterised in that described first fuel tank is additionally provided with temperature detection Device and heater, described temperature-detecting device is for detecting the temperature of the transformer oil stream in described first fuel tank, described Heater is for heating the transformer oil stream in described first fuel tank, so that the change in described first fuel tank and the second fuel tank Depressor circulation of oil flow flows.
Analogue measurement device the most according to claim 2, it is characterised in that described temperature-detecting device is arranged at described The sidewall of one fuel tank, described heater is arranged at described first tank bottoms.
Analogue measurement device the most according to claim 3, it is characterised in that the bottom of described heater and the second fuel tank Bottom be respectively arranged with insulation spacer.
Analogue measurement device the most according to claim 1, it is characterised in that described first connecting tube and described second connects Pipe is provided with flow control valve, and described first connecting tube is additionally provided with the flow of the flow for measuring described transformer oil stream Count and for regulating the variable pump of the flow velocity of described transformer oil stream.
Analogue measurement device the most according to claim 1, it is characterised in that described insulating cylinder is by high density insulating board system Becoming, described insulating cylinder includes insulate inner core and insulation urceolus, and described insulation inner core is provided with electrode in Copper Foil, described insulation urceolus It is provided with Copper Foil external electrode.
Analogue measurement device the most according to claim 6, it is characterised in that described insulating cylinder, copper cash and transformer oil stream Part by weight be respectively 5%, 35% and 60%.
Analogue measurement device the most according to claim 1, it is characterised in that the end of described test electrode is provided with electric current Sensor probe, described current sensor probe is apart from described transformer oil stream 1 millimeter to 3 millimeters;Described pico-ampere table one terminates Ground, the other end is electrically connected with described test electrode.
Analogue measurement device the most according to claim 1, it is characterised in that described first fuel tank, the second fuel tank and pico-ampere Off-balancesheet is respectively equipped with electrostatic screen layer.
Analogue measurement device the most according to claim 1, it is characterised in that the measurement scope of described pico-ampere table is: 20aA ~20mA, internal resistance is less than or equal to 1G Ω, and response speed is that every 1kV is less than 3 milliseconds.
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