CN204347165U - Deformation of transformer winding failure simulation device - Google Patents
Deformation of transformer winding failure simulation device Download PDFInfo
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- CN204347165U CN204347165U CN201520027805.5U CN201520027805U CN204347165U CN 204347165 U CN204347165 U CN 204347165U CN 201520027805 U CN201520027805 U CN 201520027805U CN 204347165 U CN204347165 U CN 204347165U
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Abstract
Deformation of transformer winding failure simulation device, its distortion fault simulation module comprises at least 3 sub-modules connected successively, each sub-module comprises two electric capacity, an inductance, one of them electric capacity is connected the input end of place load module with one end after inductance in parallel, and the other end connects the output terminal of place module; Another electric capacity one end ground connection, the other end connect the input end of place sub-module; 2 sub-modules are had at least also to comprise the first control capacittance and first gauge tap of series connection, Capacitance parallel connection that is rear and ground connection of connecting; 2 sub-modules are had at least also to comprise the second control capacittance and second gauge tap of series connection, with unearthed Capacitance parallel connection after series connection; Have at least 2 sub-modules also to comprise to regulate inductance and regulating and controlling inductance whether with the 3rd gauge tap of inductance series connection entry loop.This analogue means can be used in the test of deformation of transformer winding frequency sound test instrument, is convenient to the test exception that the fault of on-the-spot fast and easy eliminating instrument own causes.
Description
Technical field
The utility model relates to electrical equipment technical field, particularly, relates to a kind of deformation of transformer winding failure simulation device.
Background technology
Transformer is the nucleus equipment of electrical network, transformer have an accident in transportation collision and impact, the dash current born under malfunction that is in operation all can make the winding of transformer and physical construction be subject to the impact of mechanical stress, cause winding to have distortion to a certain degree, cause transformer to be in operation being easy to safety having an accident.Winding deformation is one of modal internal fault of power transformer, very harmful to power transformer.
Because winding deformation fault has serious harmfulness to transformer and Operation of Electric Systems, and test method in the past effectively can not find this kind of defect, can only by hanging inspection to verify.This not only will spend a large amount of manpower and materials, and also has certain harmfulness to transformer itself.Moreover in existing Operation of Electric Systems situation, it is also very difficult that high-power transformer has a power failure for a long time.National grid 2011 editions 18 counter arrange regulation in also preventing the short circuit of transformer near region and winding deformation to be placed on very important position.Instantly many countries are had even this detection to be placed on the top priority of transformer preventive trial project.What therefore can not hang Quick Measurement winding internal modification in cover situation at the scene is the emphasis that deformation of transformer winding detects.At present, the method for test winding deformation conventional both at home and abroad has " frequency response analysis " and " short circuit impedance method ", and wherein " frequency response analysis " is China's the most frequently used, the most effective one of means detecting winding deformation at present.The frequency accuracy of the signal source sine wave output signal of " frequency response analysis " should be less than 0.01%, sensitiveer relative to short circuit impedance method, more accurate.
Frequency response ratio juris is the equivalent circuit based on transformer, can regard the two-port network on common ground as.The frequency characteristic at this Two-port netwerk networking can describe with transfer function H (j ω)=Uo (j ω)/Ui (j ω).The method that this transport function describes network characterization is called frequency response analysis.Because every platform transformer is all to there being oneself resonse characteristic, so after winding deformation, the change of its inner parameter will cause transport function to change.The frequency response characteristic of analysis and comparison transformer, just can find whether Transformer Winding there occurs change.
In addition, deformation of transformer winding frequency sound test instrument is related to the detection accuracy of deformation of transformer winding, but present stage not yet has relevant mechanism accurately to examine and determine winding deformation tester, therefore the test that causes of the fault of on-the-spot deformation of transformer winding frequency sound test instrument own is abnormal is very difficultly found.
In prior art, in order to realize insulation and withstand voltage, transformer coil is generally all designed to cake formula structure, simultaneously for ease of heat radiation, have gap between each cake, therefore each coil cake over the ground, other phase, other electric pressure coil have one to close on electric capacity, also has inductance between coil.Bushing shell for transformer also has ground capacitance in addition, lead-in wire and joint also have electric capacity over the ground, all these are by the position of its place structure, there are the structural parameters representated by it, so by its structure, the equivalent circuit of coil when testing of a transformer can be formed, equivalent circuit as shown in Figure 1, in Fig. 1, Vs is sine wave exciting signal source voltage, Rs is swept-frequency signal output resistance, Vi is frequency sweep input signal, its value representative excitation terminal voltage, Cg is winding-to-earth capacity, Cs is electric capacity between cake, Ls is coil inductance, Cb is sleeve pipe ground capacitance, R is build-out resistor, Vo is response output signal, its value is responder voltage, in fact it reacted the electric current flowing through R, then the ratio of Vo/Vi just represents a kind of change of reactance.
When frequency is more than 1kHz, the iron core of transformer is substantially inoperative, and each winding of transformer all can be considered a passive linear two-port network be made up of resistance, electric capacity, inductance equal distribution parameter, and can ignore the resistance of winding.The bulk properties of each winding of transformer can be passed through transfer function H (j ω) and describe.
If winding there occurs the metaboly such as axis, radial dimension change, Ls, Cs, Cg equal distribution parameter of network will certainly be changed, cause the zeros and poles of its transfer function H (j ω) to distribute to change, the frequency response characteristic of network is changed.Adopting " frequency response analysis " to detect deformation of transformer winding is exactly frequency response characteristic by detecting transformer each winding, and longitudinal direction or lateral comparison are carried out to testing result, according to the difference of Swing frequency response, judge the contingent winding change of transformer.And the Swing frequency response characteristic of Transformer Winding adopts frequency sweep mode to obtain.Continuously change the outer frequency f (angular frequency=2f) executing sine-wave excitation source Vs, measure the ratio of the signal amplitude of responder voltage Vo at different frequencies and excitation terminal voltage Vi, obtain the Swing frequency response curve formulating winding in excitation end and responder situation.The frequency response curve that " frequency response analysis " records is represented by common logarithm formula, to the process of voltage magnitude such as formula (1):
H(f)＝20Log[Vo(f)/Vi(f)] (1)
In formula: Vo (f) is the mould of transport function when frequency is f | H (jw) |; The peak value that Vo (f) is responder voltage when frequency is f or effective value | Vo (jw) |, Vi (f) is for encouraging peak value or the effective value of terminal voltage when frequency is f | Vi (jw) |, Vo (f) and Vi (f) adopts peak value or effective value simultaneously, can not adopt effective value by an employing peak value one.Adopting deformation of transformer winding frequency sound test instrument to record frequency response curve is a kind of method be in daily use, and repeats no more its method in the present embodiment.
As long as therefore by changing parameter Ls, Cs, Cg equal distribution parameter in mathematical model, can common alteration type in analogue transformer winding, based on this, in the present embodiment, propose following deformation of transformer winding failure simulation device.
As shown in Figure 2, deformation of transformer winding failure simulation device, comprise signal input part, signal output part, distortion fault simulation module, described distortion fault simulation module comprises at least 3 sub-modules connected successively, the input end of a rear sub-module connects the output terminal of previous sub-module, the input end connection signal input end of first sub-module, the output terminal connection signal output terminal of last sub-module;
Each sub-module comprises two electric capacity, an inductance, and one of them electric capacity is connected the input end of place sub-module with one end after inductance in parallel, and the other end connects the output terminal of place sub-module; Another electric capacity one end ground connection, the other end connect the input end of place sub-module;
Have at least 2 sub-modules also to comprise the first control capacittance and the first gauge tap, this first control capacittance and the first gauge tap are connected afterwards and the Capacitance parallel connection of the ground connection of place sub-module;
Have at least 2 sub-modules also to comprise the second control capacittance and the second gauge tap, this second control capacittance and the second gauge tap are connected afterwards and the unearthed Capacitance parallel connection of place sub-module;
Have at least 2 sub-modules also to comprise to regulate inductance and regulating and controlling inductance whether with the 3rd gauge tap of inductance series connection entry loop, regulate inductance, inductance and the 3rd gauge tap to have two kinds of connected modes herein:
(1) described inductance is connected on the output terminal of place sub-module and regulates between inductance, described 3rd gauge tap has an input contact and two output contacts, the input end of its input connection place, contact sub-module, two output contacts are connected to and regulate inductance two ends.In practical application, herein the 3rd gauge tap can but be limited to employing single-pole double-throw switch (SPDT), also the switch that two independent can be adopted, a switch is connected to the input end of place sub-module and regulates between inductance, between the input end that another switch is connected to place sub-module and inductance, namely adopt two switches to achieve the function of the 3rd gauge tap, its object is also whether adjustment inductance is accessed loop by the mode realizing whether connecting with inductance.
(2) described inductance is connected on the input end of place sub-module and regulates between inductance, described 3rd gauge tap has an output contact and two input contacts, its output contact connects the output terminal of place sub-module, and two input contacts are connected to and regulate inductance two ends.In practical application, herein the 3rd gauge tap also can but be limited to employing single-pole double-throw switch (SPDT), also can adopt the switch that two independent, a switch is connected to the output terminal of place sub-module and regulates between inductance, between the output terminal that another switch is connected to place sub-module and inductance.Adopt two switches to achieve the function of the 3rd gauge tap, its object is also whether adjustment inductance is accessed loop by the mode realizing whether connecting with inductance.
Common alteration type in Transformer Winding and Ls, Cs, Cg equal distribution Parameters variation of correspondence thereof and the tuning-points frequency finally obtained and situation of change corresponding to tuning-points peak value as shown in the table:
Table 1 deformation of transformer winding Parameters variation table
In upper table, " all " represents whole harmonic peak; " 1 " represents the 1st harmonic peak; " L ", " M ", " H " represent respectively: low-frequency range, Mid Frequency, high band.
The inductance of the distortion fault simulation module of the deformation of transformer winding failure simulation device of the present embodiment, inductance and the 3rd gauge tap is regulated to be used for former-wound coil inductance L s, the electric capacity of ground connection, the first control capacittance and the first gauge tap are for simulating winding-to-earth capacity Cg, and unearthed electric capacity, the second control capacittance and the second gauge tap are for simulating electric capacity Cs between cake.3rd gauge tap can regulating and controlling inductance whether series connection entry loop, thus changes the size of Ls; First gauge tap controls the first control capacittance and whether accesses loop with the Capacitance parallel connection of ground connection, thus regulates the size of Cg; Second gauge tap controls the second control capacittance and whether accesses loop with unearthed Capacitance parallel connection, thus regulates the electric capacity of Cs.Thus the present embodiment can realize the large and adjustment that diminishes of the change of Ls, Cs, Cg, thus simulate all kinds of faults listed in table 1, after simulating this fault, the tuning-points frequency that the frequency response curve recorded finally obtains and situation of change corresponding to tuning-points peak value also should be corresponding with table 1, therefore, also instead from the frequency response curve obtained transformer fault can be pushed away.Therefore, the deformation of transformer winding failure simulation device of the present embodiment, both may be used for the teaching of deformation of transformer winding method of frequency response method, the test of deformation of transformer winding frequency sound test instrument can also be used for, be convenient to the test exception that the fault of on-the-spot fast and easy eliminating instrument own causes.
To sum up, because each winding of transformer all can be considered as a passive linear two-port network be made up of linear resistance, inductance (mutual inductance), electric capacity equal distribution parameter.Forming by resistance, inductance, electric capacity the actual conditions that Transformer Winding equivalent circuit just can simulate Transformer Winding work normally by building in the present embodiment, simulating the different fault type of the winding deformation run in the middle of reality by the parameter value of the inductance (mutual inductance) in change equivalent circuit, electric capacity.Then utilize deformation of transformer winding testing apparatus to this analogue means input sweep signal, by gathering the signal of its output terminal, draw out distortion waveform judge and confirm the kind of winding deformation fault, can be used for the teaching of deformation of transformer winding method of frequency response method and the test of deformation of transformer winding frequency sound test instrument.
Utility model content
The purpose of this utility model is just to provide a kind of deformation of transformer winding failure simulation device, and this device may be used for the test of deformation of transformer winding frequency sound test instrument, is convenient to the test exception that the fault of on-the-spot fast and easy eliminating instrument own causes.
The technical scheme in the invention for solving the above technical problem is:
Deformation of transformer winding failure simulation device, comprise signal input part, signal output part, distortion fault simulation module, described distortion fault simulation module comprises at least 3 sub-modules connected successively, the input end of a rear sub-module connects the output terminal of previous sub-module, the input end connection signal input end of first sub-module, the output terminal connection signal output terminal of last sub-module;
Each sub-module comprises two electric capacity, an inductance, and one of them electric capacity is connected the input end of place sub-module with one end after inductance in parallel, and the other end connects the output terminal of place sub-module; Another electric capacity one end ground connection, the other end connect the input end of place sub-module;
Have at least 2 sub-modules also to comprise the first control capacittance and the first gauge tap, this first control capacittance and the first gauge tap are connected afterwards and the Capacitance parallel connection of the ground connection of place sub-module;
Have at least 2 sub-modules also to comprise the second control capacittance and the second gauge tap, this second control capacittance and the second gauge tap are connected afterwards and the unearthed Capacitance parallel connection of place sub-module;
Have at least 2 sub-modules also to comprise to regulate inductance and regulating and controlling inductance whether with the 3rd gauge tap of inductance series connection entry loop.
As further improvement of the utility model, have and regulate the inductance of the sub-module of inductance be connected on the output terminal of place sub-module and regulate between inductance, described 3rd gauge tap has an input contact and two output contacts, the input end of its input connection place, contact sub-module, two output contacts are connected to and regulate inductance two ends.
Further, have and regulate the inductance of the sub-module of inductance be connected on the input end of place sub-module and regulate between inductance, described 3rd gauge tap has an output contact and two input contacts, its output contact connects the output terminal of place sub-module, and two input contacts are connected to and regulate inductance two ends.
Further, above-mentioned deformation of transformer winding failure simulation device also comprises the supply module be connected with distortion fault simulation module.
Further, above-mentioned deformation of transformer winding failure simulation device also comprises control module and Keysheet module, and described Keysheet module is all connected with control module with distortion fault simulation module.
Further, above-mentioned deformation of transformer winding failure simulation device also comprises connection network interface on the control unit and USB interface.
Further, described control module is also connected with LCD MODULE.
Further, described distortion fault simulation module comprises 3 sub-modules connected successively, wherein: the input end connection signal input end of the first sub-module, the output terminal connection signal output terminal of the 3rd sub-module, the input end that input end connects the output terminal of the first sub-module, output terminal connects the 3rd sub-module of the second sub-module;
First sub-module comprises inductance L 2, regulates inductance L 1, the 3rd gauge tap K1, electric capacity C1, electric capacity C2, the second control capacittance C3, the second gauge tap K2; Electric capacity C1 one end ground connection, other end connection signal input end; Electric capacity C2 one end connection signal input end, the other end connect the input end of the second sub-module; Second control capacittance C3 is connected in parallel on electric capacity C2 two ends after connecting with the second gauge tap K2; Inductance L 2 is connected on and regulates between inductance L 1 and the second sub-module, and one end that inductance L 2 is connected with electric capacity C2 is the output terminal of the first sub-module; 3rd gauge tap K1 has an input contact and two output contacts, its input contact connection signal input end, and two output contact is connected to and regulates inductance L 1 two ends;
Second sub-module comprises electric capacity C4, the first control capacittance C5, the first gauge tap K4, inductance L 4, regulates inductance L 3, the 3rd gauge tap K3, electric capacity C6; Electric capacity C4 one end ground connection, the other end connect the first sub-module output terminal; First control capacittance C5 is connected in parallel on electric capacity C4 two ends after connecting with the first gauge tap K4; The input end that electric capacity C6 one end connects the first sub-module output terminal, the other end connects the 3rd sub-module; Inductance L 4 is connected on and regulates between inductance L 3 and the 3rd sub-module, and one end that inductance L 4 is connected with electric capacity C6 is the output terminal of the second sub-module; 3rd gauge tap K3 has an input contact and two output contacts, and its input contact connects the first sub-module output terminal, and two output contact is connected to and regulates inductance L 3 two ends;
3rd sub-module comprises electric capacity C7, the first control capacittance C8, the first gauge tap K5, inductance L 5, electric capacity C9, the second control capacittance C10, the second gauge tap K6; Wherein electric capacity C7 one end ground connection, the other end connect the output terminal of the second sub-module, and the first control capacittance C8 is connected in parallel on electric capacity C7 two ends after connecting with the first gauge tap K5; Inductance L 5 one end connects the output terminal of the second sub-module, other end connection signal output terminal; Electric capacity C9 is in parallel with inductance L 5, and the second control capacittance C10 is connected in parallel on electric capacity C9 two ends after connecting with the second gauge tap K6.
Preferably, described first gauge tap K4, the first gauge tap K5, the second gauge tap K2, the second gauge tap K6, the 3rd gauge tap K1, the 3rd gauge tap K3 are relay.
To sum up, the beneficial effects of the utility model are:
1, the utility model according to the Mathematical Models of Transformer Winding a kind of deformation of transformer winding failure simulation device, this analogue means may be used for the test of deformation of transformer winding frequency sound test instrument, be convenient to the test exception that the fault of on-the-spot fast and easy eliminating instrument own causes, solve the problem cannot getting rid of the test exception that the fault of instrument own causes in prior art fast;
2, analogue means of the present utility model can also be used for the teaching of deformation of transformer winding method of frequency response method, provides a kind of simple and easy, teaching means intuitively;
3, structure of the present utility model is simple, control is convenient.
Accompanying drawing explanation
Fig. 1 is the equivalent circuit of Transformer Winding in prior art;
Fig. 2 is distortion fault simulation modular structure schematic diagram of the present utility model;
Fig. 3 is the structural representation of analogue means;
Fig. 4 is the oscillogram under analogue means default conditions;
Fig. 5 is the comparison of wave shape figure under analogue means simulates " Local Contraction " fault and default conditions;
Fig. 6 is the oscillogram of analogue means simulation " coil break stock " fault.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but embodiment of the present utility model is not limited thereto.
Embodiment 1:
Embodiment 2:
On the basis of embodiment 1, the present embodiment provides a kind of preferred structure being out of shape fault simulation module, be made up of three rank inductance (mutual inductance), condenser network, the value being switched electric capacity Cs, coil inductance Ls between winding-to-earth capacity Cg, cake by 6 gauge tap reaches the effect of simulating different faults type.
As shown in Figure 2, described distortion fault simulation module in the present embodiment comprises 3 sub-modules connected successively, wherein: the input end connection signal input end of the first sub-module, the output terminal connection signal output terminal of the 3rd sub-module, the input end that input end connects the output terminal of the first sub-module, output terminal connects the 3rd sub-module of the second sub-module;
First sub-module comprises inductance L 2, regulates inductance L 1, the 3rd gauge tap K1, electric capacity C1, electric capacity C2, the second control capacittance C3, the second gauge tap K2; Electric capacity C1 one end ground connection, other end connection signal input end; Electric capacity C2 one end connection signal input end, the other end connect the input end of the second sub-module; Second control capacittance C3 is connected in parallel on electric capacity C2 two ends after connecting with the second gauge tap K2; Inductance L 2 is connected on and regulates between inductance L 1 and the second sub-module, and one end that inductance L 2 is connected with electric capacity C2 is the output terminal of the first sub-module; 3rd gauge tap K1 has an input contact and two output contacts, its input contact connection signal input end, and two output contact is connected to and regulates inductance L 1 two ends;
Second sub-module comprises electric capacity C4, the first control capacittance C5, the first gauge tap K4, inductance L 4, regulates inductance L 3, the 3rd gauge tap K3, electric capacity C6; Electric capacity C4 one end ground connection, the other end connect the first sub-module output terminal; First control capacittance C5 is connected in parallel on electric capacity C4 two ends after connecting with the first gauge tap K4; The input end that electric capacity C6 one end connects the first sub-module output terminal, the other end connects the 3rd sub-module; Inductance L 4 is connected on and regulates between inductance L 3 and the 3rd sub-module, and one end that inductance L 4 is connected with electric capacity C6 is the output terminal of the second sub-module; 3rd gauge tap K3 has an input contact and two output contacts, and its input contact connects the first sub-module output terminal, and two output contact is connected to and regulates inductance L 3 two ends;
3rd sub-module comprises electric capacity C7, the first control capacittance C8, the first gauge tap K5, inductance L 5, electric capacity C9, the second control capacittance C10, the second gauge tap K6; Wherein electric capacity C7 one end ground connection, the other end connect the output terminal of the second sub-module, and the first control capacittance C8 is connected in parallel on electric capacity C7 two ends after connecting with the first gauge tap K5; Inductance L 5 one end connects the output terminal of the second sub-module, other end connection signal output terminal; Electric capacity C9 is in parallel with inductance L 5, and the second control capacittance C10 is connected in parallel on electric capacity C9 two ends after connecting with the second gauge tap K6.
Described first gauge tap K4, the first gauge tap K5, the second gauge tap K2, the second gauge tap K6, the 3rd gauge tap K1, the 3rd gauge tap K3 are relay.Connect C5, C5 place in circuit when first gauge tap K4 opens, during closedown, C5 disconnects; Connect C8, C8 place in circuit when first gauge tap K5 opens, during closedown, C8 disconnects; Connect C3, C3 place in circuit when second gauge tap K2 opens, during closedown, C3 disconnects; Connect C10, C10 place in circuit when second gauge tap K6 opens, during closedown, C10 disconnects; 3rd gauge tap K1 is connected between L1 and L2 when closing, and L1 is place in circuit not, only connects L1 when opening, and L1 place in circuit is connected with L2; 3rd gauge tap K3 is connected between L3 and L4 when closing, and L3 is place in circuit not, only connects L3 when opening, and L3 place in circuit is connected with L4.6 relay default conditions are that K1 closes, and L1 does not have place in circuit; K2 closes, and C3 does not have place in circuit; K3 opens, L3 place in circuit; K4 closes, and C5 does not have place in circuit; K5 opens, C8 place in circuit; K6 opens, C10 place in circuit.When distortion fault simulation module is not simulated or simulation terminate after adjust to this default conditions.
In table 1 realization of various fault large mainly through the change of Ls, Cs, Cg, to diminish and the combination of constant three kinds of states realizes, therefore only need the change realizing separately each parameter large, to diminish and constant:
Ls becomes large only need open K1, and Ls diminishes only need close K3, constant, keeps default conditions;
Cs becomes large only need open K2, and Cs diminishes only need close K6, constant, keeps default conditions;
Cg becomes large only need open K5, and Cg diminishes only need close K8, constant, keeps default conditions.
And the parameter adjustment of Ls, Cs, Cg is independent of each other, a parameter can be adjusted separately in once simulation, can also adjust 2 wherein or 3 simultaneously.
Verify choosing several fault below:
The waveform that deformation of transformer winding failure simulation device acquiescence normal condition is scanned by frequency response winding analytical instrument as shown in Figure 4.In Fig. 4, horizontal ordinate is frequency, unit kHz; Ordinate is amplitude, unit dB.Horizontal stroke, the ordinate of Fig. 5 with Fig. 6 are identical with Fig. 4.
(1) " Local Contraction " fault simulation
According to table 1, Ls and Cg is constant, and Cs becomes large:
Open K2, C3 is connected with circuit, add electric capacity between mimic channel Cs cake, comparison of wave shape under the waveform scanned by frequency response winding analytical instrument and default conditions as shown in Figure 5, an oscillogram identical with Fig. 4 in Fig. 5 is the oscillogram of default conditions, and a newly-increased oscillogram is " Local Contraction " fault simulation oscillogram.
Can find out in Fig. 5 that the waveform its " tuning-points frequency " that " Local Contraction " deformation state scans has been moved to the left clearly, its tuning-points frequency diminishes, and tuning-points peak value is also corresponding to be reduced.
(2) " coil break stock " fault simulation
According to table 1, Ls becomes large, Cs and Cg is constant:
Relay 1 is opened, and L1 place in circuit, increases coil inductance Ls, and the waveform scanned by frequency response winding analytical instrument as shown in Figure 6.
Can find out that its tuning-points frequency of waveform that " coil break stock " deformation state scans is to moving to left, tuning-points number reduces, and tuning-points peak value does not change substantially.Also the waveform distortions on coincidence theory.
The simulation of other faults is similar, does not enumerate and verify in the present embodiment.
To sum up, the distortion fault simulation module of the analogue means of the present embodiment is by the increase of 6 these three parameters of Control Cg, Cs, Ls and reduce and simulate various faults pattern and test, the change seeing tuning-points frequency and tuning-points peak value can be easy to by the waveform of scanning, may be used for calibrating winding deformation frequency sound test instrument, determine whether winding deformation frequency sound test instrument itself normally works, to the real work detecting deformation of transformer winding, there is very large effect and actual value.By analogue means simulation distortion fault, then sweep waveform can increase further and carry out deep understanding and study to multiple winding deformation fault, also can play good help for the teaching of deformation test of transformer winding.
In the present embodiment, the parameter of each inductance, electric capacity is as follows:
Inductance L 2 is 200 μ H, regulates inductance L 1 to be that 100 μ H, electric capacity C1 are 100pf, electric capacity C2 is 50pf, the second control capacittance C3 is 100pf;
Electric capacity C4 is 100pf, the first control capacittance C5 is 50pf, inductance L 4 is 200 μ H, regulate inductance L 3 to be 100 μ H, electric capacity C6 is 100pf;
Electric capacity C7 is 100pf, the first control capacittance C8 is 50pf, inductance L 5 be 200 μ H, electric capacity C9 be 10 μ f, the second control capacittance C10 is 10 μ f.
More than just a kind of preferred parameter, in practical application, those of ordinary skill in the art can according in using for impart knowledge to students or needing of simulating adjusts above-mentioned parameter.
Embodiment 3:
On the basis of embodiment 1 or embodiment 2, deformation of transformer winding failure simulation device in the present embodiment also comprises supply module, LCD MODULE, control module, Keysheet module, network interface and USB interface, as shown in Figure 3, wherein supply module is connected with distortion fault simulation module, and described LCD MODULE, network interface, USB interface, Keysheet module are all connected with control module with distortion fault simulation module.Described network interface can be, but not limited to adopt Ethernet interface or mobile communication module.
Adopt control module to control several gauge tap in the present embodiment, fault simulation is controlled convenient.This control module can be undertaken controlling also can to receive steering order by keyboard by built-in program and control, remote control commands can also be received by USB or network interface to control, this control module can be, but not limited to adopt PLC, CPLD, PFGA, receive instruction with these programmable logic controller (PLC) parts or adopt existing conventional control software design according to closed only needs of plug-in gauge tap, not needing to improve separately program.Aforesaid supply module, LCD MODULE, control module, Keysheet module, network interface and USB interface all can adopt equipment conventional in prior art or module to realize, and do not need to carry out any improvement newly to software.
Below be only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, not departing from the some improvements and modifications under the utility model principle prerequisite, protection domain of the present utility model should be considered as.
Claims (9)
1. deformation of transformer winding failure simulation device, it is characterized in that, comprise signal input part, signal output part, distortion fault simulation module, described distortion fault simulation module comprises at least 3 sub-modules connected successively, the input end of a rear sub-module connects the output terminal of previous sub-module, the input end connection signal input end of first sub-module, the output terminal connection signal output terminal of last sub-module;
Each sub-module comprises two electric capacity, an inductance, and one of them electric capacity is connected the input end of place sub-module with one end after inductance in parallel, and the other end connects the output terminal of place sub-module; Another electric capacity one end ground connection, the other end connect the input end of place sub-module;
Have at least 2 sub-modules also to comprise the first control capacittance and the first gauge tap, this first control capacittance and the first gauge tap are connected afterwards and the Capacitance parallel connection of the ground connection of place sub-module;
Have at least 2 sub-modules also to comprise the second control capacittance and the second gauge tap, this second control capacittance and the second gauge tap are connected afterwards and the unearthed Capacitance parallel connection of place sub-module;
Have at least 2 sub-modules also to comprise to regulate inductance and regulating and controlling inductance whether with the 3rd gauge tap of inductance series connection entry loop.
2. deformation of transformer winding failure simulation device according to claim 1, it is characterized in that, have and regulate the inductance of the sub-module of inductance be connected on the output terminal of place sub-module and regulate between inductance, described 3rd gauge tap has an input contact and two output contacts, the input end of its input connection place, contact sub-module, two output contacts are connected to and regulate inductance two ends.
3. deformation of transformer winding failure simulation device according to claim 1, it is characterized in that, have and regulate the inductance of the sub-module of inductance be connected on the input end of place sub-module and regulate between inductance, described 3rd gauge tap has an output contact and two input contacts, its output contact connects the output terminal of place sub-module, and two input contacts are connected to and regulate inductance two ends.
4. according to the arbitrary described deformation of transformer winding failure simulation device of claims 1 to 3, it is characterized in that, also comprise the supply module be connected with distortion fault simulation module.
5. according to the arbitrary described deformation of transformer winding failure simulation device of claims 1 to 3, it is characterized in that, also comprise control module and Keysheet module, described Keysheet module is all connected with control module with distortion fault simulation module.
6. deformation of transformer winding failure simulation device according to claim 5, is characterized in that, also comprises connection network interface on the control unit and USB interface.
7. deformation of transformer winding failure simulation device according to claim 5, is characterized in that, described control module is also connected with LCD MODULE.
8. according to the arbitrary described deformation of transformer winding failure simulation device of claims 1 to 3, it is characterized in that, described distortion fault simulation module comprises 3 sub-modules connected successively, wherein: the input end connection signal input end of the first sub-module, the output terminal connection signal output terminal of the 3rd sub-module, the input end that input end connects the output terminal of the first sub-module, output terminal connects the 3rd sub-module of the second sub-module;
First sub-module comprises inductance L 2, regulates inductance L 1, the 3rd gauge tap K1, electric capacity C1, electric capacity C2, the second control capacittance C3, the second gauge tap K2; Electric capacity C1 one end ground connection, other end connection signal input end; Electric capacity C2 one end connection signal input end, the other end connect the input end of the second sub-module; Second control capacittance C3 is connected in parallel on electric capacity C2 two ends after connecting with the second gauge tap K2; Inductance L 2 is connected on and regulates between inductance L 1 and the second sub-module, and one end that inductance L 2 is connected with electric capacity C2 is the output terminal of the first sub-module; 3rd gauge tap K1 has an input contact and two output contacts, its input contact connection signal input end, and two output contact is connected to and regulates inductance L 1 two ends;
Second sub-module comprises electric capacity C4, the first control capacittance C5, the first gauge tap K4, inductance L 4, regulates inductance L 3, the 3rd gauge tap K3, electric capacity C6; Electric capacity C4 one end ground connection, the other end connect the first sub-module output terminal; First control capacittance C5 is connected in parallel on electric capacity C4 two ends after connecting with the first gauge tap K4; The input end that electric capacity C6 one end connects the first sub-module output terminal, the other end connects the 3rd sub-module; Inductance L 4 is connected on and regulates between inductance L 3 and the 3rd sub-module, and one end that inductance L 4 is connected with electric capacity C6 is the output terminal of the second sub-module; 3rd gauge tap K3 has an input contact and two output contacts, and its input contact connects the first sub-module output terminal, and two output contact is connected to and regulates inductance L 3 two ends;
3rd sub-module comprises electric capacity C7, the first control capacittance C8, the first gauge tap K5, inductance L 5, electric capacity C9, the second control capacittance C10, the second gauge tap K6; Wherein electric capacity C7 one end ground connection, the other end connect the output terminal of the second sub-module, and the first control capacittance C8 is connected in parallel on electric capacity C7 two ends after connecting with the first gauge tap K5; Inductance L 5 one end connects the output terminal of the second sub-module, other end connection signal output terminal; Electric capacity C9 is in parallel with inductance L 5, and the second control capacittance C10 is connected in parallel on electric capacity C9 two ends after connecting with the second gauge tap K6.
9. deformation of transformer winding failure simulation device according to claim 8, it is characterized in that, described first gauge tap K4, the first gauge tap K5, the second gauge tap K2, the second gauge tap K6, the 3rd gauge tap K1, the 3rd gauge tap K3 are relay.
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| CN105526835A (en) * | 2015-10-08 | 2016-04-27 | 华北电力大学 | Simulated test platform for radial winding deformation of transformer |
| CN105527510A (en) * | 2015-10-08 | 2016-04-27 | 华北电力大学 | Simulated test platform for axial winding deformation of transformer |
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