CN107781104B - Control method and control circuit for propeller retracting - Google Patents
Control method and control circuit for propeller retracting Download PDFInfo
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- CN107781104B CN107781104B CN201610779589.9A CN201610779589A CN107781104B CN 107781104 B CN107781104 B CN 107781104B CN 201610779589 A CN201610779589 A CN 201610779589A CN 107781104 B CN107781104 B CN 107781104B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 80
- 238000004088 simulation Methods 0.000 claims description 75
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 8
- 238000012512 characterization method Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The embodiment of the invention provides a control method and a control circuit for oar collection, which comprise the following steps: monitoring whether the encoder fails; when the encoder is determined to be in fault, the encoder is controlled to stop outputting a first incremental signal to a variable pitch driver, and the analog incremental signal generating circuit is controlled to output a second incremental signal to the variable pitch driver, so that the variable pitch driver sends a pitch receiving control signal to a variable pitch motor according to the second incremental signal. After the encoder fails, the incremental signals cannot be output as the reference signals of the variable pitch driver, the analog incremental signal generating circuit is controlled to output the incremental signals as the reference signals of the variable pitch driver, the normal work of the variable pitch driver is ensured, and the variable pitch motor is driven to take up the pitch.
Description
Technical field
The present invention relates to technical field of wind power, more particularly to a kind of control method and control circuit put away the oars.
Background technique
Wind-driven generator is to convert wind energy into mechanical energy, then equipment for converting mechanical energy into electric energy.Work as wind-power electricity generation
When machine failure, for safety guarantee, need to put away the oars to the blade of wind power generating set, i.e., by the blade of wind power generating set
Feathering is to 90 degree.Each blade of wind power generating set has independent variable pitch driver, which can control variable pitch
The running speed and rotation direction of motor, pitch motor are linked by the interior tooth engagement of gear and pitch variable bearings, control blade
The variation of propeller pitch angle.
Currently, when the blade of wind power generating set is put away the oars, the operating condition of encoders monitor pitch motor, to variable pitch
Driver sends incremental signal.The incremental signal that variable pitch driver is sent according to encoder, confirmation pitch motor are actual
Running speed and rotation direction, and then the operating condition of pitch motor is controlled, form the feedback control to pitch motor.
But when encoder fault, encoder sends incremental signal without normal direction variable pitch driver, leads to pitch drive
Device disorderly closedown, is unable to control pitch motor operating, and pitch motor shutdown can make the blade of wind power generating set card paddle occur, lead
Cause is put away the oars unsuccessfully.
Summary of the invention
Present invention solves the technical problem that being to provide a kind of control method and control circuit put away the oars, so as to compile
When code device failure, incremental signal is generated by simulation increment signal generation circuit, so that variable pitch driver normal driving variable pitch electricity
Machine is put away the oars.
For this purpose, the technical solution that the present invention solves technical problem is:
A kind of control method put away the oars, which comprises
Whether monitoring encoder breaks down；
When determining that the encoder breaks down, controls the encoder and stop exporting the first increment to variable pitch driver
Formula signal, and control the simulation increment signal generation circuit and export the second incremental signal to variable pitch driver, so that
The variable pitch driver puts away the oars to pitch motor transmission according to second incremental signal and controls signal.
Optionally, whether the monitoring encoder, which breaks down, includes:
Monitor whether the absolute value signal acquired from the encoder is abnormal, when the absolute value letter acquired from the encoder
When number exception, determine that the encoder breaks down.
Optionally, whether failure includes: the monitoring encoder
Monitor whether to receive the error code that the variable pitch driver is sent, when receiving what the variable pitch driver was sent
When error code, determine that the encoder breaks down, the error code is for characterizing the encoder fault.
Optionally, the control encoder stops exporting the first incremental signal to variable pitch driver, described in control
Simulation increment signal generation circuit exports the second incremental signal to variable pitch driver
It controls first switch to disconnect, control second switch closure, the encoder is via the first switch and the change
Pitch driver is connected, and the analog signal generation circuit is connected via the second switch with the variable pitch driver；
Connect the simulation increment signal generation circuit, the simulation increment signal generation circuit is to the variable pitch driver
Export the second incremental signal.
Optionally, the control first switch disconnects, and control second switch closure includes:
The first switch disconnection is controlled by connecting D.C. contactor, controls the second switch closure.
Optionally, the connection simulation increment signal generation circuit includes:
After connecting the D.C. contactor, be delayed prefixed time interval, connects relay and is closed the switch with controlling third, institute
It states third and closes the switch the characterization connection simulation increment signal generation circuit.
Optionally, the method also includes:
Reset signal is sent to the variable pitch driver, the reset signal is answered for triggering the variable pitch driver
Position.
Optionally, the method also includes:
Monitor whether triggering limit switch；
When triggering the limit switch, controls the variable pitch driver and stop working.
A kind of control circuit put away the oars, the circuit include:
Pitch control device, encoder, variable pitch driver, and simulation increment signal generation circuit；
The pitch control device is electrically connected with the simulation increment signal generation circuit, and the encoder and the variable pitch drive
Dynamic device electrical connection, the simulation increment signal generation circuit are electrically connected with the variable pitch driver；
Whether the pitch control device monitoring encoder breaks down, when determining that the encoder breaks down, control
The encoder stops exporting the first incremental signal to the variable pitch driver, and controls the simulation increment signal and generate
Circuit exports the second incremental signal to the variable pitch driver.
Optionally, the circuit further include:
First switch and second switch；
The encoder is electrically connected via the first switch with the variable pitch driver, and the simulation increment signal generates
Circuit is electrically connected via the second switch with the variable pitch driver；
The pitch control device controls the first switch and disconnects, so that the encoder stops to the pitch drive
Device exports the first incremental signal；The pitch control device controls the second switch closure, so that the simulation increment is believed
Number generation circuit exports the second incremental signal to the variable pitch driver.
Optionally, the circuit further include:
D.C. contactor, the D.C. contactor are electrically connected with the pitch control device；
The D.C. contactor disconnects for when connecting, controlling the first switch, and controls the second switch and close
It closes.
Optionally, the circuit further include:
Third switch and relay, the relay are electrically connected with the pitch control device, the pitch control device warp
It is switched by the third and is electrically connected with the simulation increment signal generation circuit；
After the pitch control device connects the D.C. contactor, be delayed prefixed time interval, connects the relay；
The relay, for controlling the third and closing the switch when connecting, the third closes the switch characterization and connects
The working power of the simulation increment signal generation circuit.
According to the above-mentioned technical solution, the method have the advantages that:
Include: whether monitoring encoder breaks down the embodiment of the invention provides the control method put away the oars；When determining
When stating encoder and breaking down, controls the encoder and stop exporting the first incremental signal to variable pitch driver, and control
The simulation increment signal generation circuit exports the second incremental signal to variable pitch driver, so that the variable pitch driver root
It puts away the oars according to second incremental signal to pitch motor transmission and controls signal.After encoder fault, it is unable to output increment formula letter
Reference signal number as variable pitch driver, control simulation increment signal generation circuit output increment formula signal is as pitch drive
The reference signal of device guarantees that variable pitch driver works normally, and driving pitch motor is put away the oars.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the incremental signal schematic diagram of encoder output；
Fig. 2 is control circuit one exemplary construction schematic diagram provided in an embodiment of the present invention of putting away the oars；
Fig. 3 is another exemplary construction schematic diagram of control circuit provided in an embodiment of the present invention of putting away the oars；
Fig. 4 is control circuit yet another embodiment structural schematic diagram provided in an embodiment of the present invention of putting away the oars；
Fig. 5 is the electrical block diagram that encoder provided in an embodiment of the present invention works normally；
Fig. 6 is control method flow chart provided in an embodiment of the present invention of putting away the oars.
Specific embodiment
The implementation smoothly put away the oars when in order to be given at encoder fault is put away the oars the embodiment of the invention provides a kind of
Control method and control circuit, below in conjunction with Figure of description, preferred embodiment of the present invention will be described.
The operating condition of encoders monitor pitch motor, to variable pitch driver output increment formula signal, the incremental signal
The operating condition of current pitch motor can be characterized.Incremental signal schematic diagram as shown in Figure 1, the incremental signal include logical
Road A, channel B and channel N.Channel A differs 90 ° with the phase difference of channel B.Variable pitch driver compares in incremental signal and leads to
The front and back of the pulse signal of the pulse signal and channel B of road A, it is known that the rotation direction of pitch motor；According to channel A or channel
The pulse signal of B, it is known that the running speed of pitch motor；According to the zero reference pulse of channel N, it is known that pitch motor operating
Enclose number.Variable pitch driver is using the incremental signal of encoder output as reference signal, to know the operating shape of pitch motor
State, and then by the way of closed loop feedback, control the running speed and rotation direction of pitch motor.But work as encoder fault
When, variable pitch driver can not receive incremental signal as reference signal, then variable pitch driver understands failure, can not normal driving
Pitch motor realization is put away the oars.
Fig. 2 is control circuit structural representation provided in an embodiment of the present invention of putting away the oars, comprising:
Pitch control device 201, encoder 202, variable pitch driver 203, and simulation increment signal generation circuit 204.
Pitch control device 201 is electrically connected with simulation increment signal generation circuit 204, encoder 202 and variable pitch driver 203
Electrical connection, simulation increment signal generation circuit 204 are electrically connected with variable pitch driver 203.
Pitch control device 201 monitors encoder 202, and whether failure controls encoder 202 and stops when 202 failure of encoder
The first incremental signal only is exported to variable pitch driver 203, control simulation increment signal generation circuit 204 is defeated to variable pitch driver
Second incremental signal out.
As shown in Fig. 2, encoder 202 is electrically connected with variable pitch driver 203, works as encoder when encoder 202 works normally
When 202 failure, pitch control device 201 controls encoder 202 and disconnects with variable pitch driver 203, i.e. control encoder 202 stops
Only the first incremental signal is exported to variable pitch driver 203；And simulation increment signal generation circuit 204 is controlled to variable pitch driver
Export the second incremental signal.
What needs to be explained here is that the pitch control device 201 control encoder 202 stop it is defeated to variable pitch driver 203
First incremental signal out can use a variety of possible implementations.The first possible implementation, pitch control device
Switch between 201 control encoders 202 and variable pitch driver 203 disconnects, so that encoder 202 drives without normal direction variable pitch
Dynamic device 203 exports the first incremental signal；Second of possible implementation, pitch control device 201 are cut off encoder 202 and are supplied
Electrical connection between power supply can not export the first incremental signal so that encoder 202 stops working.Certainly, variable pitch control
Device 201 processed can also stop exporting the first increasing to variable pitch driver 203 using other possible implementation control encoders 202
Amount formula signal, which is not described herein again.
In one example, as shown in figure 3, pitch control device 201 passes through switch break encoder 202 and variable pitch driver
Electrical connection between 203, the control circuit put away the oars include:
First switch 301 and second switch 302.
Encoder 202 is electrically connected via first switch 301 with variable pitch driver 203, simulates increment signal generation circuit 204
It is electrically connected via second switch 302 with variable pitch driver 203.
Pitch control device 201 control first switch 301 disconnect so that encoder 202 stop it is defeated to variable pitch driver 203
First incremental signal out；Pitch control device 201 controls the second switch 302 and is closed, so that the simulation increment signal
Generation circuit exports the second incremental signal to the variable pitch driver.
Then pitch control device 201 controls encoder 202 and stops exporting the first incremental signal to variable pitch driver 203, i.e.,
Pitch control device 201 controls first switch 301 and disconnects；The control of pitch control device 201 simulates increment signal generation circuit 204 to change
Pitch driver 203 exports the second incremental signal, i.e. pitch control device 201 controls second switch 302 and is closed.
In one example, as shown in figure 4, circuit further include:
D.C. contactor 401, D.C. contactor 401 are electrically connected with pitch control device 201；
D.C. contactor 401, for when connecting, the control disconnection of first switch 301, control second switch 302 to be closed.
Pitch control device 201 indirectly controls first switch 301 and second switch 302 by D.C. contactor 401.Direct current connects
When tentaculum 401 is not switched on, first switch 301 is closed, and second switch 302 disconnects；After D.C. contactor 401 is connected, first is opened
It closes 301 to disconnect, second switch 302 is closed.Then the control of pitch control device 201 control encoder 202 stops to variable pitch driver 203
The first incremental signal is exported, control simulation increment signal generation circuit 204 exports the second incremental signal to variable pitch driver,
Connect the D.C. contactor 401.
What needs to be explained here is that can also be arranged according to actual needs, when D.C. contactor 401 is connected, first switch
Closure, second switch disconnect；When D.C. contactor 401 is not switched on, first switch is disconnected, second switch closure.At this point, variable pitch
The connection of driver disconnection D.C. contactor 401.
In one example, as shown in figure 4, the control circuit circuit put away the oars can also include:
Third switch 402 and relay 403；
Pitch control device 201 is electrically connected via third switch 402 with simulation increment signal generation circuit 204, pitch control
After device 201 connects D.C. contactor 401, be delayed prefixed time interval, connects relay 403.
Relay 403, for when connecting, control third switch 402 to be closed, and third switch 402 is closed characterization and connects mould
Quasi- increment signal generation circuit 204.
Pitch control device 201 connects simulation increment signal generation circuit with the control of relay 403 by third switch 402
204.Simulation increment signal generation circuit 204 is connected via the third switch 402 with pitch control device 201, and third switch 402 closes
It closes, pitch control device 201 is powered on to simulation increment signal generation circuit 204, at this point, simulation 204 energy of increment signal generation circuit
Enough export the second incremental signal.
After pitch control device 201 connects D.C. contactor 401, relay 403 is not connected directly, but it is default to be delayed
Then time interval connects relay 403 again, at this point, third switch 402 is closed, pitch control device 201 connects simulation increment letter
Number generation circuit 204.Simulation increment signal generation circuit 204 is connected in delay, avoids encoder 202 defeated to variable pitch driver 203
The second increment type that the first incremental signal and simulation increment signal generation circuit 204 out is exported to variable pitch driver 203 is believed
Number conflict.
After 202 troubleshooting of encoder, as shown in figure 5, pitch control device 201 can control the closure of first switch 301,
Second switch 302 disconnects, and third switch 402 also disconnects, and then controls encoder 202 and increase to the output of variable pitch driver 203 first
Amount formula signal, control simulation increment signal generation circuit 204 stop exporting the second incremental signal to variable pitch driver 203, become
Pitch driver 203 is using the first incremental signal as reference signal.
As shown in the above, the method have the advantages that:
(1) after encoder fault, encoder sends the first increment signal without normal direction variable pitch driver, at this point, pitch control
Device cuts off the connection between encoder and variable pitch driver, and control encoder stops sending the first increment letter to variable pitch driver
Number, pitch control device connects being electrically connected between simulation increment signal generation circuit and variable pitch driver, by simulation increment signal
Generation circuit exports the second increment signal as reference signal to variable pitch driver.To make variable pitch driver not report failure or event
Barrier can be reset, and to realize, pitch motor can be put away the oars with driving blade to home after encoder fault, ensure wind-power electricity generation
The safety of machine；
(2) power supply for simulating increment signal generation circuit is switched on or switched off by pitch control device control, to prevent electricity
When net voltage fluctuates, simulation increment signal generation circuit is burnt, further ensure that the realization for function of putting away the oars；
(3) D.C. contactor is controlled by pitch control device, for controlling the first of encoder output after encoder fault
The switching of increment signal and the second increment signal of simulation increment signal generation circuit output, it is ensured that increase in circuit with first
The priority signal that signal is variable pitch driver is measured to input.
(4) control circuit provided by the invention of putting away the oars is easily achieved, and control method is safe and reliable；It can be real using DSP
The generation of existing second increment signal, circuit cost are low；In addition, the input signal route to variable pitch driver switches over, meanwhile,
The purpose that relay is connected in delay is to prevent the first increment signal from clashing with the second increment information.
Fig. 6 is a kind of control method flow chart put away the oars provided in an embodiment of the present invention, comprising:
601: whether monitoring encoder breaks down.
602: when determining that the encoder breaks down, control encoder stops exporting the first increment to variable pitch driver
Formula signal, and control simulation increment signal generation circuit and export the second incremental signal to variable pitch driver, so that variable pitch
Driver puts away the oars to pitch motor transmission according to the second incremental signal and controls signal.
Pitch control device real-time monitoring encoder whether failure, have at least two possible implementations, pitch control device
Can directly monitor encoder whether failure, can also know indirectly by variable pitch driver encoder whether failure.
The first possible implementation, whether monitoring encoder, which breaks down, includes:
Whether abnormal the absolute value signal acquired from encoder is monitored, when the absolute value signal acquired from encoder is abnormal
When, determine that the encoder breaks down.
Pitch control device receives the absolute value signal that encoder is sent, if encoder fault, encoder is to pitch control
The absolute value signal that device is sent is wrong, and what is more, encoder can not send absolute value signal to pitch control device at all.Work as variable pitch
The absolute value that controller is acquired from encoder is wrong, or when can not collect absolute value signal from encoder, pitch control device
It can monitor the encoder fault.
Second of possible implementation, whether monitoring encoder, which breaks down, includes:
It monitors whether to receive the error code that variable pitch driver is sent, when the error code for receiving variable pitch driver transmission
When, determine that the encoder breaks down, error code is for characterizing encoder fault.
Variable pitch driver receives the incremental signal that encoder is sent, when variable pitch driver receives the increasing of encoder transmission
When amount formula signal is wrong or variable pitch driver can not receive the incremental signal of encoder transmission, variable pitch driver is determined
Encoder fault.Communication connection is established between pitch control device and variable pitch driver, variable pitch driver determines encoder fault
Afterwards, error code is sent to pitch control device using the communication connection between pitch control device, which can characterize the volume
Code device failure.
After pitch control device receives the error code of variable pitch driver transmission, encoder event is determined according to the error code
Barrier.After encoder fault, variable pitch driver can not be given to send the first incremental signal, then in order to guarantee the normal work of variable pitch driver
Make, pitch control device control simulation increment signal generation circuit exports the second incremental signal, pitch drive to variable pitch driver
Device puts away the oars to pitch motor transmission using the second incremental signal as reference signal and controls signal, realization is put away the oars.
The second incremental signal that increment signal generation circuit generates is simulated, is the fixed pulse signal of a cycle, with
First incremental signal of encoder output shown in FIG. 1 is similar.The running speed that second incremental signal is characterized is certain, fortune
It is also certain to turn direction.The rotation direction is the rotation direction of required pitch motor of putting away the oars.Also, during putting away the oars, variable pitch
The running speed needs of motor are kept constant.
In one example, as shown in figure 3, control encoder 202 stops exporting the first increment type to variable pitch driver 203
Signal, control simulation increment signal generation circuit 204 export the second incremental signal to variable pitch driver 203 and include:
It controls first switch 301 to disconnect, control second switch 302 is closed, and encoder 202 is via first switch 301 and becomes
Pitch driver is connected, and model signals generation circuit 204 is connected via second switch 302 with variable pitch driver 203；
Simulation increment signal generation circuit 204 is connected, simulation increment signal generation circuit 204 is defeated to variable pitch driver 203
Second incremental signal out.
Encoder 202 is electrically connected via first switch 301 with variable pitch driver 203, simulates increment signal generation circuit 204
It is electrically connected via second switch 302 with variable pitch driver 203.
Control encoder 202 stops exporting the first incremental signal to variable pitch driver 203, then pitch control device 203 is controlled
First switch 301 processed disconnects.First switch 301 disconnects, then encoder 202 is disconnected with variable pitch driver 203, then is compiled
Code device 202 exports the first incremental signal without normal direction variable pitch driver 203.
Control simulation increment signal generation circuit 204 exports the second incremental signal, then variable pitch control to variable pitch driver 203
Device 201 processed controls second switch 302 and is closed.Second switch 302 is closed, then simulates increment signal generation circuit 204 and become
Pitch driver 203 is electrically connected, and the second incremental signal that simulation increment signal generation circuit 204 generates is exported to variable pitch driver
203。
Optionally, as shown in figure 4, control first switch 301 disconnects, the control closure of second switch 302 includes:
The disconnection of first switch 301 is controlled by connecting D.C. contactor 401, control second switch 302 is closed.
Pitch control device 201 connects D.C. contactor 401, i.e., powers on to the D.C. contactor 401, then the D.C. contactor
After 401 power on, first switch 301 is disconnected, and second switch 302 is closed.
Optionally, as shown in figure 4, connection simulation increment signal generation circuit 204 includes:
After connecting D.C. contactor 401, be delayed prefixed time interval, connects relay 403 and is closed with controlling third switch 402
It closes, the closure characterization of third switch 402 connects simulation increment signal generation circuit 204.
Pitch control device 201 connects simulation increment signal generation circuit 204, that is, gives simulation increment signal generation circuit 204
It powers on.Pitch control device 201 can connect D.C. contactor 401 simultaneously, power on to simulation increment signal generation circuit 204,
The second incremental signal that control simulation increment signal generation circuit 204 generates is exported to variable pitch driver 203.
Pitch control device 201 can also be after connecting D.C. contactor 401, and be delayed prefixed time interval, then connects relay
Device 403, which controls third switch 402 and is closed, to connect the simulation increment signal generation circuit 204.I.e. disconnected
After opening the connection between encoder 202 and variable pitch driver 203, simulation increment signal generation circuit 204 and variable pitch are connected in delay
Connection between driver 203.Simulation increment signal generation circuit 204 is connected in delay, avoids encoder 202 to variable pitch driver
The second increment that the first incremental signal and simulation increment signal generation circuit 204 of 203 outputs are exported to variable pitch driver 203
Formula signal conflict.
What needs to be explained here is that according to actual needs, which connects simulation increment signal generation circuit
After 204, the operating voltage of 24V is provided to the simulation increment signal generation circuit 204.
In one example, method further include:
Reset signal is sent to variable pitch driver, reset signal is resetted for triggering variable pitch driver.
Under normal circumstances, after 202 failure of encoder, variable pitch driver 203 also can failure, and then pitch motor can not be driven
It works normally, pitch motor can also be shut down.After simulating increment signal generation circuit 204 and the connection of variable pitch driver 203, variable pitch control
Device 201 processed sends reset signal to variable pitch driver 203, triggers the variable pitch driver 203 reset, repairs due to encoder 202
Failure and 203 failure of variable pitch driver generated, so that variable pitch driver 203 receives simulation increment signal generation circuit
It is worked normally after second incremental signal of 204 outputs.
If it is unsuccessful that pitch control device 201 monitors that variable pitch driver 203 once resets, variable pitch driver is repeated
203 operations resetted, until variable pitch driver 203 resets successfully.After variable pitch driver 203 resets successfully, simulation increment is received
The second incremental signal that signal generating circuit 204 exports is sent out using second incremental signal as reference signal to pitch motor
It send to put away the oars and controls signal, put away the oars via pitch motor control blade.
What needs to be explained here is that pitch control device 201 will also judge to become before resetting to variable pitch driver 203
Whether the number that pitch driver 203 is resetted is more than preset times, if the number that variable pitch driver 203 is resetted is more than pre-
If number, then reset operation no longer is carried out to variable pitch driver 203, to protect pitch motor.If variable pitch driver 203 carries out
The number of reset is not above preset times, then executes the operation that reset signal is sent to variable pitch driver.
In one example, method further include:
Monitor whether triggering limit switch；
When triggering limit switch, control variable pitch driver stops working.
Since the control method of putting away the oars provided by the present invention given is increased by the output of simulation increment signal generation circuit 204 second
Reference signal of the amount formula signal as variable pitch driver 203, switch control are put away the oars, then variable pitch driver 203 can not be known and put away the oars
Propeller pitch angle, i.e., variable pitch driver 203 can not know when terminate put away the oars.One limit switch, the limit switch energy are then set
It is enough to characterize end of putting away the oars.
When not having to trigger limit switch, limit switch exports high level to pitch control device 201；When triggering limit switch
When, indicate end of putting away the oars, limit switch exports low level to pitch control device 201 at this time.Pitch control device 201 receives limit
After the low level for switching output, triggering limit switch is monitored, pitch control device 201 controls variable pitch driver 203 and stops working.
Pitch control device 201 stops working, and pitch motor 203 also stops working, and terminates to put away the oars.
Certainly, in practical applications, after 202 troubleshooting of encoder, pitch control device 201 controls encoder 202 to change
Pitch driver 203 exports the first incremental signal, and control simulation increment signal generation circuit 204 stops to variable pitch driver 203
Export the second incremental signal.
As shown in the above, the method have the advantages that:
(1) after encoder fault, it is unable to reference signal of the output increment formula signal as variable pitch driver, control simulation increases
Reference signal of the signal generating circuit output increment formula signal as variable pitch driver is measured, guarantees that variable pitch driver works normally,
Driving pitch motor is put away the oars.To make variable pitch driver not report failure or failure that can be reset, to realize encoder fault
Pitch motor can be put away the oars with driving blade to home afterwards, ensure the safety of wind-driven generator；
(2) power supply of incremental analog signals generation circuit is switched on or switched off by pitch control device control, to prevent electricity
When net voltage fluctuates, incremental analog signals generation circuit is burnt, further ensure that the realization for function of putting away the oars；
(3) D.C. contactor is controlled by pitch control device, for controlling the first of encoder output after encoder fault
The switching of increment signal and the second increment signal of simulation increment signal generation circuit output, it is ensured that increase in circuit with first
The priority signal that signal is variable pitch driver is measured to input.
(4) control method provided by the present invention of putting away the oars is that open loop is put away the oars control method, i.e., after triggering limit switch, variable pitch
Controller control stops the operation of variable pitch driver and pitch motor, so not needing to calibrate the second increment signal；
(5) second increment signals are easy to adjust, can guarantee to simulate by changing the tandem of channel A, channel B phase
The second increment signal and the blade that increment signal generation circuit generates direction of putting away the oars are consistent.
The control method shown in fig. 6 put away the oars is and method corresponding to Fig. 2 to control circuit shown in Fig. 4 of putting away the oars tool
Body implementation method is similar to circuit shown in Fig. 4 with Fig. 2, and referring to figs. 2 to the description of circuit shown in Fig. 4, which is not described herein again.
The above is only the preferred embodiment of the present invention, it is noted that those skilled in the art are come
It says, without departing from the principle of the present invention, can also make several improvements and retouch, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (12)
1. a kind of control method put away the oars, which is characterized in that the described method includes:
Whether monitoring encoder breaks down；The encoder, for monitoring the operating condition of pitch motor, to variable pitch driver
The first incremental signal is exported, which can characterize the operating condition of current pitch motor；
When determining that the encoder breaks down, controls the encoder and stop exporting the first increment type letter to variable pitch driver
Number, and control simulation increment signal generation circuit and export the second incremental signal to variable pitch driver, so that the variable pitch
Driver puts away the oars to pitch motor transmission according to second incremental signal and controls signal；First incremental signal and
Two incremental signals are following triple channel signal: channel A, channel B and channel N；The phase phase difference of the channel A and channel B
90 degree, the front and back of the pulse signal of the channel A and channel B obtains the rotation direction of the pitch motor, and according to logical
The pulse signal of road A or channel B obtain the running speed of the pitch motor；According to the zero reference pulse of the channel N, obtain
Obtain the circle number of the pitch motor operating.
2. the method according to claim 1, wherein whether the monitoring encoder breaks down and includes:
Whether abnormal the absolute value signal acquired from the encoder is monitored, when the absolute value signal acquired from the encoder is different
Chang Shi determines that the encoder breaks down.
3. the method according to claim 1, wherein whether failure includes: the monitoring encoder
It monitors whether to receive the error code that the variable pitch driver is sent, when the failure for receiving the variable pitch driver transmission
When code, determine that the encoder breaks down, the error code is for characterizing the encoder fault.
4. the method according to claim 1, wherein the control encoder stop it is defeated to variable pitch driver
First incremental signal out, control simulation increment signal generation circuit export the second incremental signal to variable pitch driver and include:
It controls first switch to disconnect, control second switch closure, the encoder drives via the first switch and the variable pitch
Dynamic device is connected, and the analog signal generation circuit is connected via the second switch with the variable pitch driver；
The simulation increment signal generation circuit is connected, the simulation increment signal generation circuit is exported to the variable pitch driver
Second incremental signal.
5. according to the method described in claim 4, control second switch closes it is characterized in that, the control first switch disconnects
Conjunction includes:
The first switch disconnection is controlled by connecting D.C. contactor, controls the second switch closure.
6. according to the method described in claim 5, it is characterized in that, described connect the simulation increment signal generation circuit packet
It includes:
After connecting the D.C. contactor, be delayed prefixed time interval, connects relay and is closed the switch with controlling third, and described the
Three, which close the switch characterization, connects the simulation increment signal generation circuit.
7. method described in -6 any one according to claim 1, which is characterized in that the method also includes:
Reset signal is sent to the variable pitch driver, the reset signal is resetted for triggering the variable pitch driver.
8. method described in -6 any one according to claim 1, which is characterized in that the method also includes:
Monitor whether triggering limit switch；
When triggering the limit switch, controls the variable pitch driver and stop working.
9. a kind of control circuit put away the oars, which is characterized in that the circuit includes:
Pitch control device, encoder, variable pitch driver, and simulation increment signal generation circuit；
The pitch control device is electrically connected with the simulation increment signal generation circuit, the encoder and the variable pitch driver
Electrical connection, the simulation increment signal generation circuit are electrically connected with the variable pitch driver；
Whether the pitch control device monitoring encoder breaks down；The encoder, for monitoring the operating shape of pitch motor
State exports the first incremental signal to variable pitch driver, which can characterize the operating of current pitch motor
State；
When determining that the encoder breaks down, controls the encoder and stop exporting the first increment to the variable pitch driver
Formula signal, and control the simulation increment signal generation circuit and export the second incremental signal to the variable pitch driver；Institute
It states the first incremental signal and the second incremental signal is following triple channel signal: channel A, channel B and channel N；It is described logical
The front and back of the pulse signal of 90 degree of the phase phase difference of road A and channel B, the channel A and channel B obtains the pitch motor
Rotation direction, and obtain according to the pulse signal of channel A or channel B the running speed of the pitch motor；According to described logical
The zero reference pulse of road N obtains the circle number of the pitch motor operating.
10. circuit according to claim 9, which is characterized in that the circuit further include:
First switch and second switch；
The encoder is electrically connected via the first switch with the variable pitch driver, the simulation increment signal generation circuit
It is electrically connected via the second switch with the variable pitch driver；
The pitch control device controls the first switch and disconnects so that the encoder stop it is defeated to the variable pitch driver
First incremental signal out；The pitch control device controls the second switch closure, so that the simulation increment signal produces
Raw circuit exports the second incremental signal to the variable pitch driver.
11. circuit according to claim 10, which is characterized in that the circuit further include:
D.C. contactor, the D.C. contactor are electrically connected with the pitch control device；
The D.C. contactor is disconnected for when connecting, controlling the first switch, and controls the second switch closure.
12. circuit according to claim 11, which is characterized in that the circuit further include:
Third switch and relay, the relay are electrically connected with the pitch control device, and the pitch control device is via institute
Third switch is stated to be electrically connected with the simulation increment signal generation circuit；
After the pitch control device connects the D.C. contactor, be delayed prefixed time interval, connects the relay；
The relay, for controlling the third and closing the switch when connecting, the third is closed the switch described in characterization connection
Simulate the working power of increment signal generation circuit.
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| CN201610779589.9A CN107781104B (en) | 2016-08-30 | 2016-08-30 | Control method and control circuit for propeller retracting |
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| CN107781104B true CN107781104B (en) | 2019-01-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109340048B (en) * | 2018-09-14 | 2020-03-10 | 北京金风科创风电设备有限公司 | Wind generating set operation control method and device and storage medium |
| CN113090452B (en) * | 2019-12-23 | 2022-07-05 | 新疆金风科技股份有限公司 | Wind generating set and blade feathering control method and device thereof |
| CN113357097B (en) * | 2020-03-02 | 2024-01-26 | 北京金风科创风电设备有限公司 | Blade clamping detection method and device for wind generating set |
| CN113446155B (en) * | 2020-03-27 | 2022-07-05 | 北京金风科创风电设备有限公司 | Wind generating set operation control method, variable pitch controller and variable pitch driver |
| CN113586354A (en) * | 2020-04-30 | 2021-11-02 | 新疆金风科技股份有限公司 | Method and device for identifying blade clamping fault of wind generating set |
| CN112145349B (en) * | 2020-09-28 | 2021-08-03 | 中国船舶重工集团海装风电股份有限公司 | Wind turbine generator pitch system limit switch trigger identification and control method |
| CN113721552B (en) * | 2021-06-07 | 2023-12-05 | 北京自动化控制设备研究所 | Zero-finding control algorithm for variable-pitch servo mechanism |
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