CN102842411B - Transformer with temperature measurement winding and method for on-line measuring temperature rise of transformer - Google Patents
Transformer with temperature measurement winding and method for on-line measuring temperature rise of transformer Download PDFInfo
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- CN102842411B CN102842411B CN201110172393.0A CN201110172393A CN102842411B CN 102842411 B CN102842411 B CN 102842411B CN 201110172393 A CN201110172393 A CN 201110172393A CN 102842411 B CN102842411 B CN 102842411B
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- 238000004804 winding Methods 0.000 title claims abstract description 269
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005259 measurement Methods 0.000 claims description 16
- 238000012216 screening Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 25
- 230000004907 flux Effects 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract description 3
- 230000005415 magnetization Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000011889 copper foil Substances 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
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Abstract
The invention relates to a transformer with a temperature measurement winding and a method for on-line measuring temperature rise of the transformer. The temperature measurement winding is arranged between a primary winding and a secondary winding of the transformer and is formed by arranging two windings with same number of turns in one according to a bifilar winding structure. A temperature measurement circuit is electrically connected with the temperature measurement winding, and a millivoltmeter is connected onto two terminals of the temperature measurement winding in parallel. The transformer is started to enter a working status, the voltage drop numerical values of the temperature measurement winding in multiple working statuses of the transformer are collected. According to formula operation, the temperature numerical value of the temperature measurement winding is obtained, and then the temperature rise numerical value of the transformer is led out. According to the method, the online temperature measurement for the transformer can be realized. The bias magnetization of an iron core can be prevented, and the working of the transformer cannot be influenced. The temperature measurement winding is not interfered by main flux induction voltage, and the accuracy and the reliability of the temperature measurement circuit can be increased.
Description
Technical field
The present invention relates to a kind of method of transformer with thermometric winding and transformer temperature rise on-line measurement, thermometric winding is set between the armature winding of transformer of the present invention and secondary winding; The present invention can realize transformer temperature measurement on-line, and the present invention can prevent iron core magnetic bias, does not produce any impact to transformer work.
Background technology
Chinese patent 201020274704.5 discloses a kind of electronic transformer temperature controller, comprise the power module be arranged in meter case, acquisition module, temperature adjustment module, communication module, main control module, display module, control output module and thermal resistance, acquisition module, temperature adjustment module, communication module, main control module, display module, control output module are connected with power module respectively, main control module connects acquisition module, display module, control output module respectively, and acquisition module draws meter case line connection thermal resistor.The transformer temperature controller of this patent, having the technical characterstics such as numeral intuitively shows, certainty of measurement is high, easy to adjust, working temperature is wide, is a kind of desirable power transformer temperature survey, control device.During but this patent is unsuitable for, wattage transformer, at present, in, the temperature of wattage transformer Working winding adopts indirect measure, namely after power-off, repetitive measurement winding resistance changes in time, the temperature of the front winding of power-off is derived with this, and can not on-line monitoring.For the problems referred to above, need a kind of method proposing transformer with thermometric winding and transformer temperature rise on-line measurement.
Summary of the invention
The object of the present invention is to provide a kind of transformer with thermometric winding, transformer of the present invention is between armature winding and secondary winding, arrange thermometric winding; Described thermometric winding is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical.The present invention can realize transformer temperature measurement on-line, the present invention can prevent transformer iron core magnetic bias, do not produce any impact to transformer work, the interference of thermometric winding of the present invention not acceptor's flux of magnetic induction voltage, can improve accuracy and the reliability of temperature measurement circuit.
The object of the present invention is achieved like this: a kind of transformer with thermometric winding, and cored, armature winding, secondary winding, arrange thermometric winding between described armature winding and secondary winding; Described thermometric winding is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings.
Another object of the present invention is a kind of method providing transformer temperature rise on-line measurement, and the method is the temperature of being reacted thermometric winding by the resistance change of thermometric winding, thus obtains the real time temperature of transformer.The present invention can the working temperature of Real-Time Monitoring transformer, and does not produce any impact to transformer work.
Second object of the present invention is achieved in that a kind of method of transformer temperature rise on-line measurement, arranges thermometric winding between the armature winding of described transformer and secondary winding; Described thermometric winding is by the identical winding of two numbers of turn by Double-wire parallel wound vibrational power flow together, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings; Measuring process is as follows:
A, be electrically connected with a terminal of the thermometric winding on described transformer by the constant current output of a temperature measurement circuit, another terminal of described thermometric winding is electrically connected with the earth terminal of described temperature measurement circuit;
B, a millivoltmeter is connected in parallel in the two-terminal of described thermometric winding;
C, start described in temperature measurement circuit, at room temperature t
scurrent values I and the voltage drop numerical value U of described thermometric winding is gathered under condition
s, by formula R
s=U
s/ I and R
0=R
s/ (1+At
s+ Bt
s 2+ Ct
s 3) derive 0 DEG C time described thermometric winding resistance value R
0;
D, start described transformer and enter operating state, the voltage drop numerical value U of described thermometric winding when gathering the multiple operating state of described transformer
t; According to formula R
t=R
0(1+At+Bt
2+ Ct
3) and formula R
t=U
t/ I computing obtains the Temperature numerical t of described thermometric winding;
E, derive transformer temperature numerical value according to the Temperature numerical of described thermometric winding;
Described temperature measurement circuit comprises transistor switching circuit and constant-current circuit.
The present invention compared with prior art tool has the following advantages:
1, transformer of the present invention can realize temperature measurement on-line.
2, transformer device structure of the present invention is simple, and production technology is easy, can mechanization batch production.
3, by Double-wire parallel wound vibrational power flow together, the magnetic potential that two windings that the direct current accessed during thermometric flows through anti-series produce cancels each other the winding that the thermometric winding in the present invention adopts two numbers of turn identical, thus can prevent transformer iron core magnetic bias.
4, by Double-wire parallel wound vibrational power flow together, the interchange electromotive force of two windings inductions of anti-series cancels each other the winding that the thermometric winding in the present invention adopts two numbers of turn identical, thus induced potential can be prevented the interference in thermometric loop.
5, the thermometric winding in the present invention adopts the coiling of transformer tradition wire winding, contacts closely, accurately can reflect the actual temperature of tested Transformer Winding with measured armature winding with secondary winding.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1, transformer device structure schematic diagram of the present invention;
The electrical schematic diagram of Fig. 2, thermometric winding of the present invention;
The electrical schematic diagram of Fig. 3, two thermometric windings of the present invention;
The transformer device structure schematic diagram of Fig. 4, the embodiment of the present invention two;
Screening arrangement structural representation in Fig. 5, the present invention;
The electrical schematic diagram of the thermometric winding in Fig. 6, the embodiment of the present invention two;
The electrical schematic diagram of the thermometric winding in Fig. 7, the embodiment of the present invention three;
The electrical schematic diagram of the temperature measurement circuit in Fig. 8, the embodiment of the present invention five;
The electrical schematic diagram of the temperature measurement circuit in Fig. 9, the embodiment of the present invention six;
The electrical schematic diagram of the temperature measurement circuit in Figure 10, the embodiment of the present invention seven;
The electrical schematic diagram of Figure 11, single chip circuit;
The electrical schematic diagram of Figure 12, LCD liquid crystal display circuit;
The electrical schematic diagram of Figure 13, usb circuit;
The electrical schematic diagram of Figure 14, USB output port.
Embodiment
Embodiment one:
See Fig. 1, the transformer with thermometric winding of the present invention, cored 1, armature winding 2, secondary winding 3, arrange thermometric winding 4 between described armature winding and secondary winding; Described thermometric winding is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings.Fig. 2 is the electrical schematic diagram of thermometric winding, shows the electrical structure of thermometric winding.Two other terminal 4a, 4b of described thermometric winding can be electrically connected with a temperature measurement circuit.
In the present embodiment, the capacity of transformer is 400VA, and described iron core is E shaped iron core, and (E shaped iron core is the structure of routine techniques, is not described in detail) center pillar of described E shaped iron core is arranged described armature winding, thermometric winding, secondary winding.Armature winding is set to internal layer winding, and armature winding is 315 circles, and secondary winding is set to outer winding, and secondary winding is 173 circles, and thermometric winding is 76 circles.Described secondary winding can also be set up in parallel the secondary winding of multiple different electrical parameters by prior art mode.
In the present embodiment, armature winding, secondary winding and thermometric winding are by prior art coiling; The coiling employing copper core diameter of described thermometric winding is the QZ type high strength enamelled wire of φ 0.05mm, its resistance is 8.949-10.848 Ω/m (temperature conditions is 20 DEG C-75 DEG C), the length of run of thermometric winding is 5.6 ± 0.05m, i.e. 50 ± 0.5 Ω (also can adopt other wire diameter, more high value).Described thermometric winding is by the identical winding of two numbers of turn by Double-wire parallel wound vibrational power flow together, described Double-wire parallel wound structure, be Double-wire parallel wound helical structure, the electrical quantity of the winding that two numbers of turn are identical is also identical, and the electrical quantity of winding comprises resistance value, inductance value.The Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings.This set of described two windings also can be called that anti-series is arranged; When implementing the operation of transformer thermometric, anti-series is arranged the magnetic potential that direct current thermometric electric current can be made to be produced by two windings of this thermometric winding and cancels each other, thus can prevent iron core magnetic bias; The alternating voltage that simultaneously the work main flux in iron core can be made to respond in two windings of thermometric winding cancels each other, thus them can be prevented the interference in thermometric loop.
See Fig. 3, when transformer adopts CD shaped iron core or adopt R shaped iron core, thermometric winding is by the situation of employing two thermometric windings.The left side post of described CD shaped iron core is arranged described armature winding, thermometric winding, secondary winding; The right post of described CD shaped iron core is arranged described armature winding, thermometric winding, secondary winding; The armature winding number of turn on the post of the described left side and the armature winding equal turn numbers on the post of the right, and two primary windings connected in series are together; Secondary winding turns on the post of the described left side is equal with the secondary winding turns on the post of the right, and two secondary winding are cascaded or are connected in parallel (two secondary winding maintenance capacity are identical); Thermometric winding on the post of the described left side is together with the thermometric windings in series on the post of the right.Two other terminal 4c, 4d of described thermometric winding can be electrically connected with a temperature measurement circuit.Described secondary winding can also be set up in parallel the secondary winding of multiple different electrical parameters by prior art mode.
Embodiment two:
Transformer in the present embodiment is the improvement on embodiment one basis, and technology contents not repeated description disclosed in embodiment one, disclosed in embodiment one, content also belongs to content disclosed in the present embodiment.
See Fig. 4, Fig. 5, the transformer of the present embodiment, cored 10, armature winding 20, secondary winding 30, arrange thermometric winding 40 between described armature winding and secondary winding; Described thermometric winding is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings.Between described thermometric winding and described armature winding, screening arrangement 50 is set.Fig. 6 is the electrical schematic diagram of thermometric winding, shows the electrical structure of thermometric winding.Two other terminal 40a, 40b of described thermometric winding can be electrically connected with a temperature measurement circuit.Described secondary winding can also be set up in parallel the secondary winding of multiple different electrical parameters by prior art mode.
In the present embodiment, described transformer core is E shaped iron core, the center pillar of described E shaped iron core is arranged described armature winding, screening arrangement, thermometric winding, secondary winding.The similar drum of screening arrangement in the present embodiment, adopt the Copper Foil of 0.05 mm of thickness to make, Copper Foil is rolled into Copper Foil cylinder, and the lap-joint on two limits of Copper Foil cylinder arranges insulation strip 51, and the length of insulation strip is highly equal with Copper Foil cylinder; Copper Foil tube wall surface welds lead-out wire, and this lead-out wire is electrically connected with using the protection ground wire of transformer place of the present invention system.Electrical network is eliminated the electrostatic interference that thermometric winding produces by screening arrangement completely.Screening arrangement can also adopt goldleaf, silver foil, aluminium foil, tinfoil paper to make.
Embodiment three:
Transformer in the present embodiment is the improvement on embodiment one basis, and technology contents not repeated description disclosed in embodiment one, disclosed in embodiment one, content also belongs to content disclosed in the present embodiment.
In the present embodiment, described transformer core is CD shaped iron core (CD shaped iron core belongs to the structure of prior art), the left side post of described CD shaped iron core is arranged described armature winding, screening arrangement, thermometric winding, secondary winding; The right post of described CD shaped iron core is arranged described armature winding, screening arrangement, thermometric winding, secondary winding; The armature winding number of turn on the post of the described left side and the armature winding equal turn numbers on the post of the right, and two primary windings connected in series are together; Secondary winding turns on the post of the described left side is equal with the secondary winding turns on the post of the right, and two secondary winding are cascaded; Or two secondary winding are connected in parallel (two secondary winding maintenance capacity are substantially identical); Thermometric winding on the post of the described left side is together with the thermometric windings in series on the post of the right.Fig. 7 is the electrical schematic diagram of thermometric winding, shows the electrical structure of thermometric winding.Thermometric winding on the post of the described left side is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings.Thermometric winding on the post of described the right is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings, the electrical quantity of the winding that two numbers of turn are identical is also identical.Two other terminal 40c, 40d of described thermometric winding can be electrically connected with a temperature measurement circuit.Described secondary winding can also be set up in parallel the secondary winding of multiple different electrical parameters by prior art mode.
Embodiment four:
Transformer in the present embodiment is the improvement on embodiment one basis, and technology contents not repeated description disclosed in embodiment one, disclosed in embodiment one, content also belongs to content disclosed in the present embodiment.
Described iron core is R shaped iron core (R shaped iron core belongs to the structure of prior art), the left side post of described R shaped iron core is arranged described armature winding, screening arrangement, thermometric winding, secondary winding; The right post of described R shaped iron core is arranged described armature winding, screening arrangement, thermometric winding, secondary winding; The armature winding number of turn on the post of the described left side and the armature winding equal turn numbers on the post of the right, and two primary windings connected in series are together; Secondary winding turns on the post of the described left side is equal with the secondary winding turns on the post of the right, and two secondary winding are cascaded; Thermometric winding on the post of the described left side is together with the thermometric windings in series on the post of the right.Fig. 7 is the electrical schematic diagram of thermometric winding, shows the electrical structure of thermometric winding.Thermometric winding on the post of the described left side is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings, the electrical quantity of the winding that two numbers of turn are identical is also identical.Thermometric winding on the post of described the right is integral by Double-wire parallel wound vibrational power flow by the winding that two numbers of turn are identical, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings.Two other terminal 40c, 40d of described thermometric winding can be electrically connected with a temperature measurement circuit.Described secondary winding can also be set up in parallel the secondary winding of multiple different electrical parameters by prior art mode.
Embodiment five:
See Fig. 8, the method for transformer temperature rise on-line measurement of the present invention, has a transformer, arranges thermometric winding between the armature winding of described transformer and secondary winding; Described thermometric winding is by the identical winding of two numbers of turn by Double-wire parallel wound vibrational power flow together, the Same Name of Ends electrical connection of described two windings or the non-same polarity electrical connection of described two windings; Measuring process is as follows:
A, be electrically connected with a terminal 4a of the thermometric winding on described transformer by the constant current output of a temperature measurement circuit, another terminal 4b of described thermometric winding is electrically connected with the earth terminal of described temperature measurement circuit;
B, a millivoltmeter is connected in parallel in the two-terminal of described thermometric winding;
C, start described in temperature measurement circuit, at room temperature t
sunder condition, (20 DEG C-25 DEG C) gather current values I and the voltage drop numerical value U of described thermometric winding
s, by formula R
s=U
s/ I and R
0=R
s/ (1+At
s+ Bt
s 2+ Ct
s 3) derive 0 DEG C time described thermometric winding resistance value R
0; This step is only suitable for the initiating switchup of temperature measurement circuit, now, and transformer Working winding no power; When obtaining the resistance value R of thermometric winding
0after, during transformer temperature rise on-line measurement, skip this step;
D, start described transformer and enter operating state, the voltage drop numerical value U of described thermometric winding when gathering the multiple operating state of described transformer
t; According to formula R
t=R
0(1+At+Bt
2+ Ct
3) and formula R
t=U
t/ I computing obtains the Temperature numerical t of described thermometric winding; In this step, setting electric current I is identical with the numerical value of the electric current I in previous step, and the numerical value of electric current I is that temperature measurement circuit presets, and is usually set as 10mA(milliampere);
E, derive transformer temperature numerical value according to the Temperature numerical of described thermometric winding; Due to the Working winding close contact of thermometric winding and transformer, can assert that transformer temperature numerical value equals the Temperature numerical of thermometric winding thus;
Described temperature measurement circuit comprises transistor switching circuit and constant-current circuit.
In the present embodiment, formula R
s=U
sr in/I
sthe resistance value of thermometric winding during expression room temperature condition, unit is ohm (Ω).Formula R
0=R
s/ (1+At
s+ Bt
s 2+ Ct
s 3) in t
srepresent ambient temperature numerical value, unit is degree Celsius (DEG C);
A=4.28899 × 10
-3dEG C
-1; (namely 4.28899 × 10
-3every degree Celsius)
B=-2.133×10
-7℃
-2；
C=1.233×10
-9℃
-3
R
0the DC resistance of thermometric winding when representing 0 DEG C, unit is ohm (Ω).
The technology contents of the transformer in the present embodiment can see content disclosed in embodiment one to embodiment four.The method of transformer temperature rise on-line measurement disclosed in the present embodiment can implement online temperature survey to transformer disclosed in embodiment one to embodiment four.
See Fig. 8, in the present embodiment, a NPN type triode Tr1 and one PNP type triode Tr2 is had in the transistor switching circuit of described temperature measurement circuit, the emitter of described triode Tr2 is electrically connected with positive source (+8V), the base stage of described triode Tr2 is electrically connected with the collector electrode of triode Tr1 by current-limiting resistance R2, the base stage of described triode Tr1 is electrically connected with positive source (+8V) by current-limiting resistance R1, hand switch K, and the emitter of described triode Tr1 is electrically connected with earth polar (GND); Constant-current circuit in described temperature measurement circuit comprises an integrated regulator VR (model 7805L) and a build-out resistor R3, and the collector electrode of described triode Tr2 is electrically connected with the input Vin of described integrated regulator.(other symbol in integrated regulator belongs to prior art, does not describe one by one)
Embodiment six:
The method of the transformer temperature rise on-line measurement in the present embodiment is the improvement on embodiment five basis, and technology contents not repeated description disclosed in embodiment five, disclosed in embodiment five, content also belongs to content disclosed in the present embodiment.
See Fig. 9, a NPN type triode Tr1 and one PNP type triode Tr2 is had in the transistor switching circuit of described temperature measurement circuit, the emitter of described triode Tr2 is electrically connected with positive source (+8V), the base stage of described triode Tr2 is electrically connected with the collector electrode of triode Tr1 by current-limiting resistance R2, the base stage of described triode Tr1 is electrically connected with positive source (+8V) by current-limiting resistance R1, hand switch K, and the emitter of described triode Tr1 is electrically connected with earth polar (GND); Constant-current circuit in described temperature measurement circuit comprises a barretter, and the collector electrode of described triode Tr2 is electrically connected with the input of described barretter, and the output of barretter is electrically connected with thermometric winding one end.
Embodiment seven:
The method of the transformer temperature rise on-line measurement in the present embodiment is the improvement on embodiment five basis, and technology contents not repeated description disclosed in embodiment five, disclosed in embodiment five, content also belongs to content disclosed in the present embodiment.
See Figure 10, in the present embodiment, a NPN type triode Tr1 and one PNP type triode Tr2 is had in described transistor switching circuit, the emitter of described triode Tr2 is electrically connected with positive source, the base stage of described triode Tr2 is electrically connected by the collector electrode of current-limiting resistance with triode Tr1, the emitter of described triode Tr1 is electrically connected with earth polar, and the base stage of described triode Tr1 is electrically connected with control signal input CW by current-limiting resistance; Described constant-current circuit comprises an integrated regulator and a build-out resistor, and the collector electrode of described triode Tr2 is electrically connected with the input of described integrated regulator; Have a single chip circuit CPU, the control signal input in described transistor switching circuit is electrically connected with the TXD port of described single chip circuit; The output GZ of described constant-current circuit is electrically connected with the mould of described single-chip microcomputer/number arrival end P10.Described single-chip microcomputer self-timing controls the power supply break-make of temperature measurement circuit, is only energized to thermometric winding when thermometric, avoids long-time continuous to be energized and makes thermometric winding self-heating, affect temperature measurement accuracy.In the present embodiment, by constant current numerical value I(10mA), 0 DEG C time thermometric winding DC resistance R
0write direct single chip circuit.
See Figure 11, 12, 13, 14, in the present embodiment, described single chip circuit is conventional STC12C5A48AD type single-chip microcomputer, described single chip circuit is connected with LCD liquid crystal display circuit (model 12864H-1), the port one of described LCD display circuit, port 20 be electrically connected, port 2, port one 5 is electrically connected with+5V, port 3 is electrically connected with the sliding end of potentiometer RP1, port one 8 is electrically connected with the upper end of potentiometer RP1, the lower end of potentiometer RP1 be electrically connected, port 4, port 5, the P33 of port 6 and single-chip microcomputer, P34, P35 holds electrical connection, port 7, port 8, port 9, port one 0, port one 1, port one 2, port one 3, port one 4 respectively with the D0 of single-chip microcomputer, D1, D2, D3, D4, D5, D6, D7 holds electrical connection, port one 6, port one 7 is vacant.
In the present embodiment, described single chip circuit can also be connected with usb circuit, described usb circuit is connected with a USB output port, the port INT0 of described single chip circuit, port WR, port RD, port A8, port D0, port D1, port D2, port D3, port D4, port D5, port D6, port D7 respectively with the pin 1 of usb circuit, pin 3, pin 4, pin 8, pin 15 ~ 22 connects, the port UD+ of described usb circuit, port UD-, port GND respectively with the UD+ of USB output port, UD-, GND connects, the pin 5 of described usb circuit, pin 12, pin 23 ground connection, pin 2 meets+5V through C6, pin 9 is through C7 ground connection, pin 13, pin 14 connects the two ends of crystal (simultaneously respectively through C4, C5 ground connection), pin 24 is through light-emitting diode D5, R6 meets+5V, pin 27 meets the Y3 of decoding circuit U2, pin 28 meets+5V, pin 6, pin 7, pin 25, pin 26 is vacant.1,2,3,6 of decoding circuit meet A12, A13, A14 of single-chip microcomputer, 4,5,8 ground connection, 16 meet+5V.(other symbol do not mentioned in single chip circuit, LCD liquid crystal display circuit, usb circuit belongs to prior art, does not describe one by one).
Claims (5)
1. the transformer with thermometric winding, cored, armature winding, secondary winding, it is characterized in that: thermometric winding is set between described armature winding and secondary winding, described thermometric winding is by the identical winding of two numbers of turn by Double-wire parallel wound vibrational power flow together, the non-same polarity electrical connection of the Same Name of Ends electrical connection of the winding that described two numbers of turn are identical or the identical winding of described two numbers of turn; The resistance value of the winding that two numbers of turn in described thermometric winding are identical, inductance value are identical; Between described thermometric winding and armature winding, cartridge type screening arrangement is set; Described cartridge type screening arrangement is electrically connected with protection ground wire.
2. the method for a transformer temperature rise on-line measurement, it is characterized in that: thermometric winding is set between the armature winding of described transformer and secondary winding, described thermometric winding is by the identical winding of two numbers of turn by Double-wire parallel wound vibrational power flow together, the non-same polarity electrical connection of the Same Name of Ends electrical connection of the winding that described two numbers of turn are identical or the identical winding of described two numbers of turn; The resistance value of the winding that two numbers of turn in described thermometric winding are identical, inductance value are identical; Between described thermometric winding and armature winding, cartridge type screening arrangement is set; Described cartridge type screening arrangement is electrically connected with protection ground wire; Measuring process is as follows:
A, be electrically connected with a terminal of the thermometric winding on described transformer by the Constant current output end of a temperature measurement circuit, another terminal of described thermometric winding is electrically connected with the earth terminal of temperature measurement circuit;
B, a millivoltmeter is connected in the two-terminal of described thermometric winding;
C, start described in temperature measurement circuit, at room temperature t
scurrent values I and the voltage drop numerical value U of described thermometric winding is gathered under condition
s, by formula R
s=U
s/ I and R
0=R
s/ (1+At
s+ Bt
s 2+ Ct
s 3) derive 0 DEG C time described thermometric winding resistance value R
0;
D, start described transformer and enter operating state, the voltage drop numerical value U of described thermometric winding when gathering the multiple operating state of described transformer
t; According to formula R
t=R
0(1+At+Bt
2+ Ct
3) and formula R
t=U
t/ I computing obtains the Temperature numerical of described thermometric winding;
E, derive transformer temperature numerical value according to the Temperature numerical of described thermometric winding;
Described temperature measurement circuit comprises transistor switching circuit and constant-current circuit.
3. the method for transformer temperature rise on-line measurement according to claim 2, it is characterized in that: in described transistor switching circuit, have a NPN type triode Tr1 and PNP type triode Tr2, the emitter of described triode Tr2 is electrically connected with positive source, the base stage of described triode Tr2 is electrically connected by the collector electrode of current-limiting resistance with triode Tr1, the base stage of described triode Tr1 is electrically connected with positive source by current-limiting resistance, hand switch, and the emitter of described triode Tr1 is electrically connected with earth polar; Constant-current circuit in described temperature measurement circuit comprises an integrated regulator and a build-out resistor, and the collector electrode of described triode Tr2 is electrically connected with the input of described integrated regulator.
4. the method for transformer temperature rise on-line measurement according to claim 2, it is characterized in that: in the transistor switching circuit of described temperature measurement circuit, have a NPN type triode Tr1 and PNP type triode Tr2, the emitter of described triode Tr2 is electrically connected with positive source, the base stage of described triode Tr2 is electrically connected by the collector electrode of current-limiting resistance with triode Tr1, the base stage of described triode Tr1 is electrically connected with positive source by current-limiting resistance, hand switch, and the emitter of described triode Tr1 is electrically connected with earth polar; The constant-current circuit of described temperature measurement circuit comprises a barretter, and the collector electrode of described triode Tr2 is electrically connected with the input of described barretter, and the output of barretter is electrically connected with thermometric winding one end.
5. the method for transformer temperature rise on-line measurement according to claim 2, it is characterized in that: in described transistor switching circuit, have a NPN type triode Tr1 and PNP type triode Tr2, the emitter of described triode Tr2 is electrically connected with positive source, the base stage of described triode Tr2 is electrically connected by the collector electrode of current-limiting resistance with triode Tr1, and the emitter of described triode Tr1 is electrically connected with earth polar; The base stage of described triode Tr1 is electrically connected with control signal output CW by current-limiting resistance; Described constant-current circuit comprises an integrated regulator and a build-out resistor, and the collector electrode of described triode Tr2 is electrically connected with the input of described integrated regulator; Have a single chip circuit, the control signal input in described transistor switching circuit is electrically connected with the TXD port of described single chip circuit, and the output GZ of described constant-current circuit is electrically connected with the mould of described single-chip microcomputer/number arrival end P10.
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| US9640315B2 (en) * | 2013-05-13 | 2017-05-02 | General Electric Company | Low stray-loss transformers and methods of assembling the same |
| CN103292920B (en) * | 2013-05-14 | 2017-02-08 | 国家电网公司 | Matcher for winding thermometer |
| CN103954872B (en) * | 2014-05-20 | 2017-04-26 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| FR3028087B1 (en) * | 2014-11-05 | 2016-12-23 | Labinal Power Systems | COIL ELEMENTS HAVING A TEMPERATURE MEASURING DEVICE |
| CN104977490A (en) * | 2015-07-03 | 2015-10-14 | 巢湖市金辉自控设备有限公司 | Temperature-rise test method for transformer |
| CN109827679B (en) * | 2019-03-11 | 2020-08-04 | 山东理工大学 | Distribution transformer winding temperature rise online monitoring system and online monitoring method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567252A (en) * | 2009-02-12 | 2009-10-28 | 陈钦裕 | Novel winding method for high-frequency transformer coils |
| CN101969290A (en) * | 2010-09-30 | 2011-02-09 | 中国矿业大学 | Speed sensor-free speed regulation device and method for DC motor |
| CN102054559A (en) * | 2009-10-29 | 2011-05-11 | 乾坤科技股份有限公司 | Multiplex output choke |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01296605A (en) * | 1988-05-25 | 1989-11-30 | Toshiba Corp | Device for detecting temperature of transformer |
| JP3023740B2 (en) * | 1993-03-29 | 2000-03-21 | スタンレー電気株式会社 | Transformer temperature detector |
| JP2001148312A (en) * | 1999-11-22 | 2001-05-29 | Seiko Epson Corp | Temperature detecting circuit and temperature detecting method |
| JP2005150581A (en) * | 2003-11-19 | 2005-06-09 | Toyota Industries Corp | Circuit for detecting temperature of winding component or transformer |
-
2011
- 2011-06-24 CN CN201110172393.0A patent/CN102842411B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567252A (en) * | 2009-02-12 | 2009-10-28 | 陈钦裕 | Novel winding method for high-frequency transformer coils |
| CN102054559A (en) * | 2009-10-29 | 2011-05-11 | 乾坤科技股份有限公司 | Multiplex output choke |
| CN101969290A (en) * | 2010-09-30 | 2011-02-09 | 中国矿业大学 | Speed sensor-free speed regulation device and method for DC motor |
Non-Patent Citations (1)
| Title |
|---|
| 杨平,李志斌.常用热电阻的温度-阻值变换的解析计算.《传感器技术》.2002,第21卷(第1期),第38页. * |
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