CN104377911B - The dehumidifying method of wind-driven generator, apparatus and system - Google Patents
The dehumidifying method of wind-driven generator, apparatus and system Download PDFInfo
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- CN104377911B CN104377911B CN201410659032.2A CN201410659032A CN104377911B CN 104377911 B CN104377911 B CN 104377911B CN 201410659032 A CN201410659032 A CN 201410659032A CN 104377911 B CN104377911 B CN 104377911B
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Abstract
A kind of dehumidifying method of wind-driven generator that the present invention is provided, apparatus and system, the method include：Winding in the three-phase windings unit of direction wind-driven generator applies DC current, and obtains winding temperature, carries out current control to DC current according to winding temperature, and current control includes：If winding temperature is more than the first preset temperature and is less than the second preset temperature, then according to the winding temperature adjustment DC current for getting, incrementally increase DC current, winding temperature is closer to the second preset temperature, the amplitude of DC current increase is less, if winding temperature is equal to the second preset temperature, keep DC current constant.The dehumidifying method and device of the wind-driven generator of the present invention, apply DC current to carry out heating dehumidifying by the winding of direction wind-driven generator, and the amplitude of variation of DC current is adjusted according to the degree of closeness between winding temperature and default temperature, so as to realize safe and reliable dehumidifying.
Description
Technical field
The present invention relates to wind power generation field, more particularly to a kind of dehumidifying method of wind-driven generator, apparatus and system.
Background technology
Modern large-scale wind driven generator runs into plum rain season, air humidity in transport, storage and field-mounted process
Greatly, or at the scene after installing because some reason down times it is long when, all easily there is stator and rotor windings surface wetting, cause
Insulating properties is reduced.If now put into operation rashly, it is possible to cause insulating motor coil to puncture, cause the accident.At present, mainly
The methods such as external heat source heating, stator iron loss seasoning, short circuit current seasoning and A.C. welder seasoning are taken to use
In wind-driven generator dehumidifying, but, as said method is in the limitation of the aspects such as application scenario, the suitability and safety, no
Suitable for modern large-scale wind driven generator.
For example, external heat source heating needs first to disassemble motor, is put into motor intracavity pair with powerful incandescent lamp bulb
Which is toasted, or motor is put in drying room is dried, and the method is only applicable to easily-disassembled micro-machine.Iron loss is done
Dry method is also required to disassemble the rotor of motor and stator, on stator on magnet exciting coil, be passed through low-voltage AC produce magnetic flux,
Heating unshakable in one's determination is made using the stator iron loss of sensing, so as to be dried coil, the method is also suitable only for easily-disassembled motor.And it is short
Road drying by internal heat is generally used for the in-situ processing of electromotor, and short dot is located at stator outlet, and stator need to be stable low
Speed is lower to be run, and has adjustable exciting current, controls baking temperature by adjusting exciting current when being dried, but straight for large-scale
Magneto alternator is driven, the excitation of rotor is provided by permanent magnet, not with regulating power, therefore, the method is in the machine
There is modulability difference during type application and there is the defect of certain risk.Additionally, A.C. welder seasoning can be fixed by motor
Rotor is disassembled, and only need to be passed through alternating current to machine winding, is dried using winding resistance heating, but due to A.C. welder work
As when the electric current that is added on electric welder transformer it is larger, it is impossible to use for a long time, may otherwise burn out electric welding machine, the method is only fitted
For low-power machine, and can not use for a long time.
The content of the invention
Embodiments of the invention provide a kind of dehumidifying method of wind-driven generator, apparatus and system, to realize utilizing wind-force
The winding of electromotor itself carries out safe and reliable dehumidifying.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
A kind of dehumidifying method of wind-driven generator, including：
The winding of direction wind-driven generator applies DC current, and obtains winding temperature, according to the winding temperature to described
DC current carries out current control, and the current control includes：
If the winding temperature is more than first preset temperature and is less than the second preset temperature, according to what is got
The winding temperature adjusts the DC current, incrementally increases the DC current, and the winding temperature is closer to described the
Two preset temperatures, the amplitude of the DC current increase are less, if the winding temperature is equal to second preset temperature,
Keep the DC current constant.
A kind of damp-eliminating apparatus of wind-driven generator, including DC source, winding temperature acquisition module and current control mould
Block,
The DC source is used for the winding of direction wind-driven generator and applies DC current；
The winding temperature acquisition module is used to obtain winding temperature；
The current control module for current control being carried out to the DC current according to the winding temperature,
The current control module includes the first current control unit：For pre- more than described first in the winding temperature
If temperature and less than in the case of the second preset temperature, the DC current is adjusted according to the winding temperature for getting, is made
The DC current is incrementally increased, and the winding temperature is closer to second preset temperature, the width of the DC current increase
Degree is less, if the winding temperature is equal to second preset temperature, keeps the DC current constant.
A kind of dehumidifying system of wind-driven generator, including the stator or rotor of above-mentioned damp-eliminating apparatus and wind-driven generator
A three-phase windings unit or multiple three-phase windings units.
Dehumidifying method, device and system in the wind-driven generator of the present invention, is applied by the winding of direction wind-driven generator
Plus DC current is carrying out heating dehumidifying, and according to the degree of closeness between winding temperature and default temperature adjusting direct current
The amplitude of variation of electric current, so as to realize safe and reliable dehumidifying, and as the winding using itself carries out heating dehumidifying, because
This, is not limited by site conditions, can directly be applied using scene in wind-driven generator, it is not necessary to disassemble motor.
Description of the drawings
Structural representations of the Fig. 1 for the damp-eliminating apparatus of the embodiment of the present invention three；
Fig. 2 is one of structural representation of dehumidifying system of the embodiment of the present invention four；
Fig. 3 for the structural representation of the dehumidifying system of the embodiment of the present invention four two；
Fig. 4 for the structural representation of the dehumidifying system of the embodiment of the present invention four three；
Fig. 5 for the structural representation of the dehumidifying system of the embodiment of the present invention four four；
Fig. 6 for the structural representation of the dehumidifying system of the embodiment of the present invention four five；
Fig. 7 for the structural representation of the dehumidifying system of the embodiment of the present invention four six.
Drawing reference numeral explanation
11- DC sources；12- winding temperature acquisition modules；13- current control modules；The first current control units of 131-；
The second current control units of 132-；The 3rd current control units of 133-；The 4th current control units of 134-；14- three-phase windings lists
Unit；141- windings access switch controller；K1- alternating-current switch；K2- windings access switch；K3- windings access switch；R- is adjustable
Resistance；1st, 2,3,4,5 is terminal label.
Specific embodiment
Below in conjunction with the accompanying drawings the embodiment of the present invention is described in detail.
Embodiment one
Winding in three-phase windings unit of the dehumidifying method of the embodiment of the present invention by direction wind-driven generator applies direct current
Electric current, and winding temperature is obtained, current control is carried out to DC current according to winding temperature, realizes removing wind-driven generator
Tide.
Current control main policies can include：If winding temperature is more than the first preset temperature and less than the second default temperature
Degree, then adjust flowed electric current according to the winding temperature for getting, incrementally increase DC current, and winding temperature is pre- closer to second
If temperature, the amplitude of DC current increase is less, if winding temperature is equal to the second preset temperature, keeps DC current not
Become.Wherein, the second preset temperature is the target heating temperature of winding, that is, wish to incrementally increase electric current most by feedback control
Winding temperature is stable on target heating temperature at last, so as to the winding temperature with constant is removed to wind-driven generator
Tide.First preset temperature is the starting point for performing above-mentioned control strategy, and it zero can also be less than the second preset temperature that can be
Any value, first preset temperature can rule of thumb or test is setting.
In above-mentioned control strategy, increase electric current step by step and can reduce the damage to winding, and the trend of electric current increase
Reduce with the degree for being close to the second preset temperature, in such manner, it is possible to more accurately control to heat in target by winding temperature
In temperature such that it is able to realize safely and steadly dehumidifying.
Further, winding temperature less than in the case of the first preset temperature, can adopt direction wind-driven generator around
Group applies fixed DC current to carry out winding heating, it would however also be possible to employ the DC current of change is heating to winding.
Due to being just to have started to heat machine winding, to avoid the impact injury to winding insulation, too fast heating is difficult, that is, is difficult
Using super-high-current, and it is difficult to make heating-up temperature rising too fast, it is therefore preferred that above-mentioned current control can also include：Will
DC current rises to initial DC electric current less than winding rated current according to predetermined climbing speed from zero, and keeps this first
Beginning DC current.Wherein, initial DC electric current can be less than or equal to winding rated current 30%.
When further, having exceeded the second preset temperature for winding temperature, needs are taken and lower DC current
Measure, enables winding temperature to return on the second preset temperature, therefore, current control can also include：If winding temperature
More than the second preset temperature and less than the 3rd preset temperature, then according to the winding temperature adjustment DC current for getting, direct current is made
Electric current progressively reduces, and, closer to the second preset temperature, the amplitude that DC current reduces is less for winding temperature.
Further, winding temperature can not increase unlimitedly, when more than the 3rd above-mentioned preset temperature is increased to,
Need to take safety control strategy, stopping to heat winding, i.e., current control can also include：If winding temperature is more than
Or be equal to the 3rd preset temperature, then stop applying DC current to winding.
In the present embodiment, winding temperature four temperature range sections have been divided into into and have been controlled using different control strategies
System, so as to realize safe and reliable dehumidifying, and as the winding using wind-driven generator itself carries out heating dehumidifying, therefore,
Do not limited by site conditions, can directly be applied using scene in wind-driven generator, it is not necessary to disassemble motor.
Embodiment two
Control strategy to each temperature range in embodiment one is further described in more detail by the present embodiment.Its
In, the concrete mode for obtaining winding temperature can be to obtain winding temperature at predetermined intervals, it is preferable that will be arranged at wind
Multiple first winding temperature detectors in power generator (it is not shown, for example, can for arrange per phase winding 3 first around
Group temperature detector, so, in each three-phase windings unit, is provided with 9 the first winding temperature detectors) temperature that measures
Meansigma methodss as the winding temperature for getting.
Specifically, each temperature range and control strategy can be：
1) as t≤T1When, I ＜ Ia, wherein t is current winding temperature, T1(can for example be 70 for the first preset temperature
DEG C), I is the current DC current for applying, IaFor winding rated current, in the temperature range, it is preferable that I can be set as
Winding rated current IaLess than 30% constant current.
2) work as T1＜ t≤T2When, T2For the second preset temperature (such as can be 100 DEG C), can adopt in temperature range
Equation below adjusts DC current：
In+1=In×K1... ... ... ... ... ... ... ... ... ... formula (1)
K1=A1-B1×(t-T1)-C1× dt ... ... ... ... ... ... ... formulas (2)
Wherein, InRepresent the DC current at current time, In+1Represent the DC current of the subsequent time after adjustment, K1For electricity
Stream regulation coefficient, t are the winding temperature that current time obtains, and dt is that the winding temperature for obtaining at current time is obtained with previous moment
Winding temperature difference, T1For the first preset temperature, A1、B1、C1For winding temperature rise gradient parameter set in advance, its value can
Flexibly to be set according to actual blower fan type and environmental factorss etc., if can realize incrementally increasing DC current and
Winding temperature is closer to the second preset temperature, the less control targe of the amplitude that DC current increases.For example, A1Value
May range from 1 to 1.5, B1Span can be 0.001 to 0.005, C1Span can be 0.01 to 0.05.
T is close in t2When, above-mentioned K11 will be leveled off to, i.e., in t=T2When, realize keeping the current DC current for applying constant.
3) work as T2＜ t≤T3When, T3For the 3rd preset temperature (such as can be 130 DEG C), can adopt in temperature range
Equation below adjusts DC current：
In+1=In×K2... ... ... ... ... ... ... ... ... ... formula (3)
K2=A2-B2×(t-T2)-C2× dt ... ... ... ... ... ... ... formulas (4)
Wherein, InRepresent the DC current at current time, In+1Represent the DC current of the subsequent time after adjustment, K2For electricity
Stream regulation coefficient, t are the winding temperature that current time obtains, and dt is that the winding temperature for obtaining at current time is obtained with previous moment
Winding temperature difference, T2For the second preset temperature, A2、B2、C2For winding temperature rise gradient parameter set in advance, its value can
Flexibly to be set according to actual blower fan type and environmental factorss etc., if can realize making DC current progressively reduce and
Winding temperature is closer to the second preset temperature, the less control targe of the amplitude that DC current reduces.For example, A2Value
Scope can be with 0.5 times of A1, B1Span can be 10 times of B1, C2Span can be with C1It is identical.T is close in t2
When, above-mentioned K11 will be leveled off to, i.e., in t=T2When, realize keeping the current DC current for applying constant.
4) as t ＞ T3When, need to perform power safety protection, stop applying DC current to winding.
Embodiment three
As shown in figure 1, which is the damp-eliminating apparatus structural representation of the embodiment of the present invention three, the damp-eliminating apparatus include unidirectional current
Source 11, winding temperature acquisition module 12 and current control module 13, wherein, DC source 11 be used for direction wind-driven generator around
Group applies DC current；Winding temperature acquisition module 12 is used to obtain winding temperature；Current control module 13 is for according to winding
Temperature carries out current control to DC current, and current control module 13 includes the first current control unit 131：For in winding temperature
Degree adjusts unidirectional current according to the winding temperature for getting more than the first preset temperature and less than in the case of the second preset temperature
Stream, incrementally increases DC current, and, closer to the second preset temperature, the amplitude of DC current increase is less for winding temperature, if
Winding temperature is equal to the second preset temperature, then keep DC current constant.
In above-mentioned damp-eliminating apparatus, control of the current control module 13 to DC current increases electric current step by step, so as to
The damage to winding can be reduced, and the trend of electric current increase reduces, Neng Gougeng with the degree for being close to the second preset temperature
Plus accurately winding temperature is controlled on target heating temperature such that it is able to realize safely and steadly dehumidifying.
Further, damp-eliminating apparatus can also include the second current control unit 132, for being less than or waiting in winding temperature
In the case of the first preset temperature, DC current is made to rise to less than winding rated current from zero according to predetermined climbing speed
Initial DC electric current, and keep the initial DC electric current.Wherein, initial DC electric current is less than or equal to winding rated current
30%.
Further, damp-eliminating apparatus can also include the 3rd current control unit 133, for being more than second in winding temperature
Preset temperature and less than in the case of the 3rd preset temperature, according to the winding temperature adjustment DC current for getting, makes unidirectional current
Stream progressively reduces, and, closer to the second preset temperature, the amplitude that DC current reduces is less for winding temperature.
Further, damp-eliminating apparatus also include the 4th current control unit 134, in winding temperature more than or equal to the
In the case of three preset temperatures, stop applying DC current to winding.
Further, damp-eliminating apparatus also include the multiple first winding temperature detectors being arranged in wind-driven generator (not
Diagram), wherein, winding temperature is the meansigma methodss of the temperature that the plurality of first winding temperature detector is measured.
Additionally, can adopt in the control strategy of each current control unit corresponding to each above-mentioned temperature range
The various concrete control strategy described in embodiment two is stated, be will not be described here.
Example IV
As shown in Figures 2 to 7, the present embodiment is related to the dehumidifying system of wind-driven generator, and which mainly includes three institute of embodiment
One three-phase windings unit 14 or multiple three-phase windings lists of the stator or rotor of the damp-eliminating apparatus and wind-driven generator of introduction
Unit 14.The generator windings that damp-eliminating apparatus or dehumidifying system i.e. of the invention are related to can be stator winding, or turn
Sub- winding, and the number of three-phase windings unit 14 do not limit.Each three-phase windings unit 14 includes U, V, W three-phase windings, three-phase
Winding can also adopt wye connection using delta connection.
Three-phase windings unit 14 shown in Fig. 2 uses delta connection, the three-phase in three-phase windings unit 14 around
Group forms series loop with the outfan (terminal 2 and terminal 3 in figure) of DC source 11.Delta connection winding externally has 6
Three-phase windings very easily can be connected by joint so that the DC current that three-phase flows through is identical, so as to motor is heated evenly.
Alternatively, the three-phase windings unit 14 shown in Fig. 3 uses wye connection, due to the winding inconvenience of wye connection
It is connected in series in three-phase windings are carried out, therefore, also switch K2 and K3 is accessed including two windings in the three-phase windings unit 14
And the phase winding in winding access switch controller 141, and the three-phase windings of three-phase windings unit 14 is (such as shown in Fig. 3
For winding W) free end be connected with an outfan (terminal 3) of DC source 11, other two phase windings are (such as shown in Fig. 3
For winding U and V) free end access switch K2 and K3 another outfan respectively with DC source 11 by two windings
(terminal 2) connects, and winding accesses switch controller 141 carries out on-off control for two windings are accessed with switch K2 and K3, makes
Other two phase windings alternately access another outfan (terminal 2) of DC source 11, so as to ensure that it is biphase that any time has
Winding has electric current to flow through.With the lengthening and the switching of different phase windings of wind-driven generator dehumidifying time, wind-force can be finally made
The winding and core portion of electromotor becomes the hot equipotentiality body of thermally equivalent.
Further, three-phase windings unit 14 can also include measure respectively other two phase windings (such as Fig. 3 show around
Group U and V) the second winding temperature detector of winding temperature (not shown, the second winding temperature detector can also be above-mentioned
A part in multiple first winding temperature detectors, for example, using the first winding temperature detector corresponding to winding U and V
Serve as the second winding temperature detector), winding accesses switch controller 141 according to the second winding temperature detector (not shown)
The winding temperature of other two phase windings for measuring, calculates the temperature difference between other two phase windings, if the temperature difference exceedes in advance
If threshold value (for example, the predetermined threshold value can between 10K to 20K value, K be kelvin degree unit, the predetermined threshold value according to
Concrete electromotor type and application scenarios specifically set), then accessing switch to described two windings carries out on-off control, makes described
Other two phase windings alternatings access another outfan of the DC source 11.For example, when front winding accesses the state of switch
Close for K2, K3 disconnects, after heating a period of time, the temperature of winding U is raised, when the temperature difference height between winding U and winding V
When predetermined threshold value, then K2 closure K3 are disconnected, winding V is linked on DC source 11, is started to heat winding V, such as
This is repeatedly so that winding U is roughly the same with the temperature of winding V.
Additionally, it will be appreciated by persons skilled in the art that the number of its three-phase windings of the wind-driven generator of different type of machines
Meeting difference is measured, that is, the wind-driven generator having there may be multiple three-phase windings units 14, and with reference to Fig. 4, which is that triangle connects
The extension of the system structure of method, system after expansion include n three-phase windings unit 14 and 3n phase windings, wherein, n three
Mode connects phase winding unit 14 in parallel, for each three-phase windings unit 14, the control mode of its winding temperature
With it is consistent in Fig. 2, will not be described here.
As shown in figure 5, its be the wye connection shown in Fig. 3 system structure expand, it is the same with Fig. 4, after expansion be
System includes that damp-eliminating apparatus shown in a set of Fig. 1, n three-phase windings unit 14, n winding access switch controller 141,2n
Winding accesses switch (K2 and K3) and 3n phase windings, wherein, mode connects in parallel for n three-phase windings unit 14, for every
For individual three-phase windings unit 14, the control mode of its winding temperature and winding are accessed in the control mode and Fig. 3 of switch
Unanimously, will not be described here.
Additionally, three-phase windings unit 14 can also be connected by series system, as shown in Figures 6 and 7.
As shown in fig. 6, another kind of system structure which is the delta connection shown in Fig. 2 is expanded, and it is the same with Fig. 4, expanding
System after exhibition includes n three-phase windings unit 14 and 3n phase windings, wherein, n three-phase windings unit 14 passes through series connection side
(in figure, being connected in series as an example with two three-phase windings units 14, in actual applications, can adopt as in figure for formula connection
Multiple three-phase windings units 14 are connected in series by shown series system), for each three-phase windings unit 14, its
The control mode of winding temperature with it is consistent in Fig. 2, will not be described here.
As shown in fig. 7, the system structure which is the wye connection shown in Fig. 3 is expanded, the system after expansion includes one
Damp-eliminating apparatus, n three-phase windings unit 14, n winding shown in set Fig. 1 access switch controller 141,2n winding and access and open
Close (K2 and K3) and 3n phase windings, wherein, n three-phase windings unit 14 by series system connection (in figure with two three-phases around
Group unit 14 is connected in series as an example, in actual applications, can be using series system as illustrated in the drawing by multiple three
Phase winding unit 14 is connected in series), for each three-phase windings unit 14, the control mode of its winding temperature and
Winding access switch control mode with it is consistent in Fig. 3, will not be described here.
It should be noted that it will be appreciated by those skilled in the art that above-mentioned winding accesses the function of switch controller 141
Computer heating control is carried out to concentrate during current control module 13 can also be incorporated into, the on-off control in different three-phase windings units 14
Device 141 can also be integrated into a control module to perform each control module or unit in control function, and the present invention
Can also be incorporated in blower fan control system to exercise its control function.
Introduce again below in actual applications, the concrete composition example of above-mentioned damp-eliminating apparatus part.If Fig. 2 is to figure
Shown in 7, the DC source 11 in above-mentioned damp-eliminating apparatus can be by alternating-current switch K1, ac power input end (terminal 1), many
Individual low pressure parallel connection direct power supply 11 (the AC/DC modules in figure), DC fuse (being arranged at terminal 2 and 3) and diesel oil are sent out
Motor is constituted.Terminal 1 can pass through cable and be connected with the case change of blower fan system, introduce the device power supply (DPS) of wind-driven generator as electricity
Power is originated, or diesel-driven generator may also be employed is powered, and can also save terminal 1 and external electricity in this case
Cable.Terminal 2 and terminal 3 apply DC circuit to winding by cable connection to wind-driven generator winding.Additionally, to avoid out
The moment induced voltage that shut-off is produced punctures the insulation protection of winding coil, and having connected in generator windings link circuit can
Adjust resistance R.
DC source 11 belongs to offline firing equipment, and which moves and easy for installation, and can configure movable trailer is used for different machines
The dehumidifying work of position electromotor.During dehumidifying, DC source 11 is placed on outside tower, one terminates case low pressure side or electromotor,
The other end is accessed and is connected with generator windings in tower.
In actual applications, the current control module 13 in Fig. 2 shown in dotted line inframe, except including above-described embodiment three
Outside each current control unit, communication interface and power interface can also be included.Communication interface is by the connection control electricity of terminal 4
Cable, realizes that (winding temperature acquisition module 12 is may be embodied in blower fan control system, i.e., using existing wind with blower fan control system
Winding temperature monitoring modular in machine system is realizing the acquisition to winding temperature) communication, specifically can be including in terms of two：One
Aspect, current control module 13 send instructions to blower fan control system by terminal 4, it is desirable to into winding heating mode, then wind
Machine control system will switch K1 closures, and the winding temperature of feedback is obtained from blower fan control system；On the other hand, current control
Module 13 generates current control instruction according to control strategy, to DC source 11 according to the generator windings temperature for feeding back
It is controlled.Power interface introduces DC source 11 from blower fan system by No. 5 terminals, used as the power supply of control module.
In sum, the dehumidifying method of wind-driven generator provided in an embodiment of the present invention, device and system, by aweather
The winding of power generator applies DC current to carry out heating dehumidifying, and according to connecing between winding temperature and default temperature
Short range degree adjusting the amplitude of variation of DC current, so as to realize safe and reliable dehumidifying, and due to the winding using itself
Heating dehumidifying is carried out, therefore, do not limited by site conditions, can directly be applied using scene in wind-driven generator, it is not necessary to disassemble
Motor.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (19)
1. a kind of dehumidifying method of wind-driven generator, it is characterised in that include：
Winding in the three-phase windings unit of direction wind-driven generator applies DC current, and obtains winding temperature, according to it is described around
Group temperature carries out current control to the DC current, and the current control includes：
If the winding temperature is more than the first preset temperature and is less than the second preset temperature, according to the winding for getting
Temperature adjusts the DC current, incrementally increases the DC current, and the winding temperature is closer to the described second default temperature
Degree, the amplitude of the DC current increase are less, if the winding temperature is equal to second preset temperature, keep described
DC current is constant；
Wherein, the acquisition winding temperature is to obtain the winding temperature at predetermined intervals, then according to the institute for getting
State the winding temperature adjustment DC current to be specially：The DC current is adjusted using equation below,
In+1=In×K1；
K1=A1-B1×(t-T1)-C1× dt,
Wherein, InRepresent the DC current at current time, In+1Represent the DC current of the subsequent time after adjustment, K1Adjust for electric current
Integral coefficient, t is the winding temperature that current time obtains, dt be winding temperature and the previous moment for obtaining at current time obtain around
Group temperature difference, T1For the first preset temperature, A1、B1、C1For winding temperature rise gradient parameter set in advance.
2. method according to claim 1, it is characterised in that the current control also includes：If the winding temperature
Less than or equal to first preset temperature, then make the DC current from zero according to predetermined climbing speed rise to less than around
The initial DC electric current of group rated current, and keep the initial DC electric current.
3. method according to claim 2, it is characterised in that the initial DC electric current is less than or equal to the specified electricity of winding
Stream 30%.
4. method according to claim 1, it is characterised in that the current control also includes：If the winding temperature
More than second preset temperature and less than the 3rd preset temperature, then the direct current is adjusted according to the winding temperature for getting
Electric current, makes the DC current progressively reduce, and the winding temperature subtracts closer to second preset temperature, the DC current
Little amplitude is less.
5. method according to claim 4, it is characterised in that the current control also includes：If the winding temperature
More than or equal to the 3rd preset temperature, then stop applying the DC current to winding.
6. method according to claim 4, it is characterised in that the acquisition winding temperature is to obtain at predetermined intervals
The winding temperature is taken, then the DC current is adjusted according to the winding temperature for getting and is specially：Using equation below
The DC current is adjusted,
In+1=In×K2；
K2=A2-B2×(t-T2)-C2× dt,
Wherein, InRepresent the DC current at current time, In+1Represent the DC current of the subsequent time after adjustment, K2Adjust for electric current
Integral coefficient, t is the winding temperature that current time obtains, dt be winding temperature and the previous moment for obtaining at current time obtain around
Group temperature difference, T2For the second preset temperature, A2、B2、C2For winding temperature rise gradient parameter set in advance.
7. method according to claim 1, it is characterised in that the winding temperature is to be arranged in the wind-driven generator
The meansigma methodss of temperature that measure of multiple first winding temperature detectors.
8. a kind of damp-eliminating apparatus of wind-driven generator, it is characterised in that including DC source, winding temperature acquisition module and electricity
Flow control module,
The DC source is used for the winding of direction wind-driven generator and applies DC current；
The winding temperature acquisition module is used to obtain winding temperature；
The current control module for current control being carried out to the DC current according to the winding temperature,
The current control module includes the first current control unit：For the winding temperature be more than the first preset temperature and
In the case of less than the second preset temperature, the DC current is adjusted according to the winding temperature for getting, the direct current is made
Electric current is incrementally increased, and, closer to second preset temperature, the amplitude of the DC current increase is less, such as the winding temperature
Really described winding temperature is equal to second preset temperature, then keep the DC current constant；
Wherein, the acquisition winding temperature is to obtain the winding temperature at predetermined intervals, then according to the institute for getting
State the winding temperature adjustment DC current to be specially：The DC current is adjusted using equation below,
In+1=In×K1；
K1=A1-B1×(t-T1)-C1× dt, wherein, InRepresent the DC current at current time, In+1Represent next after adjustment
The DC current at moment, K1For electric current regulation coefficient, t is the winding temperature that current time obtains, and dt is what current time obtained
The difference of the winding temperature that winding temperature is obtained with previous moment, T1For the first preset temperature, A1、B1、C1For winding set in advance
Temperature gradient parameter.
9. device according to claim 8, it is characterised in that the damp-eliminating apparatus also include the second current control unit,
In the case of in the winding temperature less than or equal to first preset temperature, make the DC current from zero according to pre-
Determine climbing speed and rise to initial DC electric current less than winding rated current, and keep the initial DC electric current.
10. device according to claim 9, it is characterised in that the initial DC electric current is specified less than or equal to winding
Electric current 30%.
11. devices according to claim 8, it is characterised in that the damp-eliminating apparatus also include the 3rd current control unit,
For being more than second preset temperature and less than in the case of the 3rd preset temperature in the winding temperature, according to what is got
The winding temperature adjusts the DC current, the DC current is progressively reduced, and the winding temperature is closer to described the
Two preset temperatures, the amplitude that the DC current reduces are less.
12. devices according to claim 9, it is characterised in that the damp-eliminating apparatus also include the 4th current control unit,
In the case of in the winding temperature more than or equal to the 3rd preset temperature, stop applying the unidirectional current to the winding
Stream.
13. devices according to claim 11, it is characterised in that the winding temperature acquisition module is between the predetermined time
Every the winding temperature is obtained, then in the 3rd current control unit, according to the winding temperature adjustment institute for getting
State DC current to be specially：Using equation below to adjusting the DC current,
In+1=In×K2；
K2=A2-B2×(t-T2)-C2× dt,
Wherein, InRepresent the DC current at current time, In+1Represent the DC current of the subsequent time after adjustment, K2Adjust for electric current
Integral coefficient, t is the winding temperature that current time obtains, dt be winding temperature and the previous moment for obtaining at current time obtain around
Group temperature difference, T2For the second preset temperature, A2、B2、C2For winding temperature rise gradient parameter set in advance.
14. devices according to claim 8, it is characterised in that described device also includes being arranged at the wind-driven generator
In multiple first winding temperature detectors, the winding temperature is the temperature that the plurality of first winding temperature detector is measured
Meansigma methodss.
The dehumidifying system of 15. a kind of wind-driven generators, it is characterised in that include the dehumidifying as described in claim 8 to 14 is arbitrary
One three-phase windings unit or multiple three-phase windings units of the stator or rotor of device and wind-driven generator.
16. systems according to claim 15, it is characterised in that the three-phase windings unit adopts delta connection, institute
The three-phase windings stated in three-phase windings unit form series loop with the outfan of the DC source.
17. systems according to claim 15, it is characterised in that the three-phase windings unit adopts wye connection, in institute
Also switch is accessed including two windings in stating three-phase windings unit and winding accesses switch controller, the three-phase windings unit
Three-phase windings in the free end of a phase winding be connected with an outfan of the DC source, other two phase windings from
Switch is accessed by described two windings by end to be connected with another outfan of the DC source respectively, the winding is accessed
Switch controller carries out on-off control for accessing switch to two windings, makes described other two phase windings alternately access institute
State another outfan of DC source.
18. systems according to claim 17, it is characterised in that the three-phase windings unit also includes measuring described respectively
Second winding temperature detector of the winding temperature of other two phase windings, the winding access switch controller according to described second
The winding temperature of other two phase windings that winding temperature detector is measured, calculates the temperature between described other two phase windings
Difference, if the temperature difference exceedes predetermined threshold value, accessing switch to described two windings carries out on-off control, make it is described other two
Phase winding alternating accesses another outfan of the DC source.
19. according to the arbitrary described systems of claim 15 to 18, it is characterised in that the plurality of three-phase windings unit it is in parallel or
Between the outfan of the DC source for being connected on the damp-eliminating apparatus.
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| CN107528433B (en) * | 2016-06-20 | 2019-07-26 | 新疆金风科技股份有限公司 | Monitor drying control method, the system of permanent magnet motor magnetic pole temperature |
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| CN107478348B (en) * | 2017-08-09 | 2024-05-07 | 中国标准化研究院 | Winding temperature rise detection equipment |
| CN108390493A (en) * | 2018-01-24 | 2018-08-10 | 广西投资集团方元电力股份有限公司桥巩水电站分公司 | A kind of hydrogenerator dampproof method and equipment |
| CN108712037A (en) * | 2018-06-01 | 2018-10-26 | 安徽晋煤中能化工股份有限公司 | A kind of 6kV stator of synchronous motor winding drying means |
| CN109687666B (en) * | 2019-01-26 | 2020-03-24 | 浙江朝舜机电有限公司 | Three-phase asynchronous motor for explosion-proof fan |
| CN112751467B (en) * | 2020-12-29 | 2022-04-15 | 精进电动科技股份有限公司 | Self-heating method and water inlet maintenance method for driving motor |
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| CN101478202A (en) * | 2008-01-02 | 2009-07-08 | 新疆金风科技股份有限公司 | Heating and dehumidifying method and apparatus for motor |
| CN202872700U (en) * | 2012-08-29 | 2013-04-10 | 中国一冶集团有限公司 | Motor control circuit having insulation automatic maintenance and drying function |
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