CN108131250B - A kind of auxiliary drive device and its control method of pitch-controlled system - Google Patents
A kind of auxiliary drive device and its control method of pitch-controlled system Download PDFInfo
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- CN108131250B CN108131250B CN201711395708.1A CN201711395708A CN108131250B CN 108131250 B CN108131250 B CN 108131250B CN 201711395708 A CN201711395708 A CN 201711395708A CN 108131250 B CN108131250 B CN 108131250B
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Classifications
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- 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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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- 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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
-
- 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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/047—Automatic control; Regulation by means of an electrical or electronic controller characterised by the controller architecture, e.g. multiple processors or data communications
-
- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- 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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of assistant drive systems of pitch-controlled system, driver is connect with control module, the output end of auxiliary drive device is in parallel by the input terminal of switching device with the output end of driver, the output end of switching device is connect with pitch motor, auxiliary drive device and switching device respectively with control module communication connection.When driver breaks down, the power supply of pitch motor will be switched to the output end of auxiliary drive device, guarantee that pitch-controlled system still is able to that blade is made to return to zero energy angle when driver itself breaks down, the deficiency that pitch-controlled system is completely dependent on driver to the drive control of pitch motor is compensated for, the safety of pitch-controlled system or even entire unit can be improved.Meanwhile using phase controlling is carried out on auxiliary drive device, the course changing control to pitch motor may be implemented, thus do not need additional accessory power supply when wind power plant carries out blade installation, check and correction, reduce installation equipment and simplify installation process.
Description
Technical field
The present invention relates to the auxiliary drive devices and its control of technical field of wind power generation more particularly to a kind of pitch-controlled system
Method.
Background technique
Wind energy is a kind of novel, reproducible eco-friendly power source, and wind-power electricity generation project is national industrial policies active support
Key project.In recent years, wind-power electricity generation obtains fast development in China.Wind power generating set experienced fixed pitch stall
Type, full blade displacement type, the variable speed model based on variable speed constant frequency technology and intelligent rapid development, in this development process,
The development of control technology on wind electricity generation unit has played decisive action, and the development of blade control technology plays the development of overall technology
Important impetus is arrived.Variable blade control system is the important component of modern large fan.It can be with the big of wind speed
The small vanepiston angle to wind power generating set automatically adjusts.When low wind speed starts, blade pitch can be gone to properly
Angle, make wind wheel have maximum starting torque；When wind speed is excessively high, by adjusting blade pitch, change air-flow to blade
The angle of attack, thus change wind power generating set acquisition aerodynamic torque, make generator power output keep stablize.
There are mainly two types of main products for the pitch control device in the wind power plant in China or even the whole world at present: a kind of
It is traditional DC servo drive control device using direct current generator as execution unit, battery as backup power supply, the
Two kinds are using AC-servo control device of the alternating current generator as execution unit, super capacitor as backup power supply.The
It is a kind of to use DC servo drive technology, in system jam, storage battery power supply is automatically switched to, driving blade returns to peace
All positon.But service lifetime of accumulator is short and maintenance period is short and resistance to low temperature difference becomes the fatal of its development is hindered to lack
It falls into.Second of product, as backup power supply, preferably solves the problems, such as service life and cryogenic property, but this using super capacitor
The operation control of kind product, the execution of system failure processing result, manually and automatically all place one's entire reliance upon servo-driver, and one
Denier servo-driver itself breaks down, then blade cannot return to zero energy Angle Position, so that entire Wind turbines be made to be in
Unsafe condition.Once repeatedly occurred making blower fall because backup power source failure causes blade that can not return to home in wind power plant
The crushing event of tower.In addition, both products require additionally to make a set of pair of storage when wind power plant installs blade
The power-supply device of electric accessory power supply or directly drive actuating motor that battery or super capacitor are filled, which increase blade installations
The fussy degree of process.
Therefore, how to guarantee that pitch-controlled system still is able to that blade is made to return to zero energy angle when servo-driver itself breaks down
The installation process of position and simplified wind power plant blade becomes those skilled in the art's urgent problem.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problem to be solved by the present invention is how to guarantee servo-drive
Pitch-controlled system still is able to make blade return to zero energy Angle Position and simplify the installation of wind power plant blade when device itself breaks down
Journey.
In order to solve the above technical problems, present invention employs the following technical solutions:
A kind of assistant drive system of pitch-controlled system, including pitch motor, driver and control module, the driver with
The control module connection, further includes auxiliary drive device and switching device, in which:
The input terminal that the output end of the output end of the auxiliary drive device and the driver passes through the switching device
Parallel connection, the output end of the switching device are connect with the pitch motor, the auxiliary drive device and the switching device point
Not with the control module communication connection；
When the control module detects that the driver works normally, the control module is sent to the driver
Speed, direction instruction, the driver drive the pitch motor to operate according to the speed, direction instruction and oneself state,
When the control module detects the driver no power or is powered in malfunction, the control module is cut to described
Changing device sends a high level fault signal, and the power supply of the pitch motor is switched to the auxiliary and driven by the switching device
Dynamic device.
Preferably, the auxiliary drive device includes contactor, two-way inverter and ac voltage regulator, in which:
Pass through the contactor and three-phase electricity after the two-way inverter is in parallel with the input terminal of the ac voltage regulator
Source connection, output end of the output end of the ac voltage regulator as the auxiliary drive device；
The contactor and the control module communication connection；
The two-way inverter and the ac voltage regulator communication connection.
Preferably, the auxiliary drive device further includes accumulation power supply, in which:
The accumulation power supply is connect by DC bus with the two-way inverter；
The accumulation power supply and the control module communication connection.
A kind of control method of the assistant drive system of pitch-controlled system, uses pitch-controlled system as described in claim 1
Assistant drive system carries out auxiliary drive to the pitch motor, includes the following steps:
When the driver works normally, the control module control the switching device make the driver with it is described
Pitch motor connection, the driver drive the pitch motor work；
When the driver no power or when breaking down, the control module, which controls the switching device, makes the auxiliary
Driving device is connected to the pitch motor, and the control module controls the auxiliary drive device and drives the pitch motor work
Make.
Preferably, the auxiliary drive device includes contactor, two-way inverter and ac voltage regulator, described two-way inverse
Become device to connect by the contactor with three phase mains with after the parallel connection of the input terminal of the ac voltage regulator, the AC voltage adjusting
Output end of the output end of power supply as the auxiliary drive device, the contactor and the control module communication connection, institute
Two-way inverter and the ac voltage regulator communication connection are stated, the control module controls the auxiliary drive device and drives institute
Stating pitch motor work includes:
The control module controls the contactor contact, distinguishes the two-way inverter and the ac voltage regulator
It is connected to the three phase mains, the two-way inverter controls the ac voltage regulator using Realization of pulse width modulation based on voltage space vector
The frequency and phase of the alternating current of output, and then control steering and the revolving speed of the pitch motor.
Preferably, the auxiliary drive device further includes accumulation power supply, the accumulation power supply by DC bus with it is described
Two-way inverter connection, the accumulation power supply and the control module communication connection, the control method of the assistant drive system
Further include:
When the voltage of the accumulation power supply is lower than predeterminated voltage, the control module controls the contactor contact, institute
Two-way inverter is stated to charge to the accumulation power supply；
When needing the auxiliary drive device to drive the pitch motor and the three phase mains power down, the energy storage electricity
Source is ac voltage regulator power supply.
Preferably, the predeterminated voltage is 75 volts.
In conclusion the invention discloses a kind of assistant drive system of pitch-controlled system, including pitch motor, driver and
Control module, driver are connect with control module, further include auxiliary drive device and switching device, the output of auxiliary drive device
End is in parallel by the input terminal of switching device with the output end of driver, and the output end of switching device is connect with pitch motor, auxiliary
Help driving device and switching device respectively with control module communication connection.When driver breaks down, the power supply of pitch motor
It will be switched to the output end of auxiliary drive device, guarantee that pitch-controlled system still is able to return to blade when driver itself breaks down
Zero energy angle compensates for the deficiency that pitch-controlled system is completely dependent on driver to the drive control of pitch motor, variable pitch can be improved
The safety of system or even entire unit.Meanwhile using phase controlling is carried out on auxiliary drive device, may be implemented to variable pitch electricity
The course changing control of machine, thus additional accessory power supply is not needed when wind power plant carries out blade installation, check and correction, reduce installation and sets
It is standby to simplify installation process.
Detailed description of the invention
In order to keep the purposes, technical schemes and advantages of invention clearer, the present invention is made into one below in conjunction with attached drawing
The detailed description of step, in which:
Fig. 1 is a kind of structural schematic diagram of the assistant drive system of pitch-controlled system disclosed by the invention；
Fig. 2 is the structural schematic diagram of auxiliary drive device disclosed by the invention；
Fig. 3 be include assistant drive system disclosed by the invention pitch-controlled system structural schematic diagram
Fig. 4 is the control block diagram of two-way inverter；
Fig. 5 is space voltage vector, sector schematic diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, the invention discloses a kind of assistant drive system of pitch-controlled system, including pitch motor, driver
And control module, driver are connect with control module, further include auxiliary drive device and switching device, in which:
The output end of auxiliary drive device and the output end of driver are in parallel by the input terminal of switching device, switching device
Output end connect with pitch motor, auxiliary drive device and switching device respectively with control module communication connection；
When control module detects that driver works normally, control module is instructed to driver transmission speed, direction, is driven
Dynamic device is according to speed, direction instruction and oneself state driving pitch motor operating, when control module detects driver no power
Or when being powered in malfunction, control module sends a high level fault signal to switching device, and switching device is by variable pitch
The power supply of motor is switched to auxiliary drive device.
AC 400V indicates that 400 volts of three phase mains, solid line indication circuit cable, dotted line indicate communication connection in Fig. 1
Line, the invention discloses a kind of assistant drive system of pitch-controlled system, when driver works normally, control module is to driver
Transmission speed, direction instruction, variable pitch driver are operated according to instruction and oneself state driving pitch motor.When driver no power
Or when being powered in malfunction, control module issues a high level fault signal, and switching device is by the power supply of pitch motor
It is switched to auxiliary drive device.The present invention guarantees that pitch-controlled system still is able to that blade is made to return to zero power when driver itself breaks down
Rate angle compensates for the deficiency that pitch-controlled system is completely dependent on driver to the drive control of pitch motor, pitch-controlled system can be improved
Or even the safety of entire unit.Meanwhile using phase controlling is carried out on auxiliary drive device, may be implemented to pitch motor
Course changing control, thus additional accessory power supply is not needed when wind power plant carries out blade installation, check and correction, reduce installation equipment letter
Installation process is changed.
As shown in Figure 3 in the present invention, pitch-controlled system system includes three relatively independent control units and a set of auxiliary
Drive system is helped to form.Each control unit includes a control cabinet, and each control cabinet includes control module, DC/DC power supply, fills
Power supply, theft-resistant link chain, driver and supercapacitor group.
Three control units control three pitch motors respectively to three blades of control, and pass through Profibus bus
(Process FieldbusROFIBUS) and slip ring and cabin master control, become three independent Profibus slave stations of cabin master control, i.e. cabin master
Control can respectively control three control units.Associated part is the theft-resistant link chain of wheel hub between three control units, i.e.,
Three control units provide a passive node respectively, and three nodes connect to form wheel hub theft-resistant link chain.
When wind power generating set automatic running, cabin master control sends angle to three control modules by Profibus bus
The instruction such as degree, speed, acceleration, control module will instruct and be sent to corresponding driving by CAN bus after resolving is handled
Device, driver, to drive blade to run to specified angle, simultaneously will with specified speed driving motor driving pitch motor
The speed of service of pitch motor, the information such as oneself state of driver are sent to control module.Control module is by pitch-controlled system
Operation conditions, fault message etc. are sent to cabin master control.In normal operation mode, blade angle is controlled from 0 ° to approximate 30 °
Power processed, wind speed is about 3 to 25m/s.It is constant by adjusting blade angle control spinner velocity.Normal operation mode includes machine
Cabin master control is needed according to unit and the orderly closedown of progress, i.e., by blade feathering to 89 ° in the trouble-free situation of pitch-controlled system
Position.If encountering extreme climate or emergency, cause pitch-controlled system can not normal feathering, then can switch to auxiliary drive dress
It sets and blade is retracted into home, guarantee entire Wind turbine safety, avoid serious accident.
As shown in Fig. 2, when it is implemented, auxiliary drive device includes contactor, two-way inverter and ac voltage regulator,
Wherein:
It is connect by contactor with three phase mains after two-way inverter is in parallel with the input terminal of ac voltage regulator, exchange is adjusted
Output end of the output end of voltage source as auxiliary drive device；
Contactor and control module communication connection；
Two-way inverter and ac voltage regulator communication connection.
In Fig. 2, AC 400V indicates that 400 volts of three phase mains, solid line indication circuit cable, dotted line indicate communication connection
Line.The output end of ac voltage regulator is connected by switching device with pitch motor.When needing using auxiliary drive device, control
The contact of molding block control contactor, ac voltage regulator export alternating current to pitch motor.Its rotation direction of pitch motor and
Speed depends on the frequency and phase of the ac voltage regulator of two-way inverter control, limit of the slewing area of blade by blade
Bit switch control.
As shown in Fig. 2, when it is implemented, auxiliary drive device further includes accumulation power supply, in which:
Accumulation power supply is connect by DC bus with two-way inverter；
Accumulation power supply and control module communication connection.
When accumulation power supply voltage drops to predeterminated voltage or less, two-way inverter charges to it.If electric network power-fail, i.e.,
When three phase mains is unable to normal power supply, accumulation power supply can guarantee variable pitch to ac voltage regulator by two-way inverter reverse power supply
System feathering.
The invention also discloses a kind of control methods of the assistant drive system of pitch-controlled system, use above-mentioned pitch-controlled system
Assistant drive system to pitch motor carry out auxiliary drive, include the following steps:
When driver works normally, control module control switching device is connected to driver with pitch motor, driver
Drive pitch motor work；
When driver no power or when breaking down, control module control switching device makes auxiliary drive device and variable pitch electricity
Machine connection, control module control auxiliary drive device driving pitch motor work.
When driver works normally, control module is instructed to driver transmission speed, direction, and variable pitch driver is according to finger
It enables and oneself state driving pitch motor operates.When driver no power or energization are in malfunction, control module is issued
The power supply of pitch motor is switched to auxiliary drive device by one high level fault signal, switching device.The present invention guarantees driving
Pitch-controlled system still is able to that blade is made to return to zero energy angle when device itself breaks down, and compensates for drive of the pitch-controlled system to pitch motor
It is dynamic to control the deficiency for being completely dependent on driver, the safety of pitch-controlled system or even entire unit can be improved.Meanwhile utilizing auxiliary
Carry out phase controlling in driving device, may be implemented the course changing control to pitch motor, thus wind power plant carry out blade installation,
Additional accessory power supply is not needed when check and correction, is reduced installation equipment and is simplified installation process.
When it is implemented, auxiliary drive device includes contactor, two-way inverter and ac voltage regulator, two-way inverter
It is connect by contactor with three phase mains after in parallel with the input terminal of ac voltage regulator, the output end conduct of ac voltage regulator
The output end of auxiliary drive device, contactor and control module communication connection, two-way inverter and ac voltage regulator communication connect
It connects, control module control auxiliary drive device driving pitch motor work includes:
The contact of control module control contactor, is connected to two-way inverter and ac voltage regulator with three phase mains respectively,
The frequency and phase for the alternating current that two-way inverter is exported using Realization of pulse width modulation based on voltage space vector control ac voltage regulator, into
And control steering and the revolving speed of pitch motor.
In the present invention, two-way inverter uses Realization of pulse width modulation based on voltage space vector (SVPWM, Space Vector
Pulse Width Modulation), control block diagram is as shown in Figure 4.What two-way inverter need to control is ac voltage regulator
Frequency and phase, to guarantee that ac voltage regulator remains to stablize output in electric network power-fail.If the three-phase of three phase mains input
Voltage is respectively ua、ub、ucAfter 3/2 coordinate transform, obtained ud、uq, ud、uqThe respectively coordinate of space rotating magnetic field
Value, for determining rotating excitation field phase angle, then with reference valueIt makes comparisons, obtained error is through voltage PI regulator tune
Section, then through Park inverse transformation, finally make PWM (Pulse Width Modulation, the pulse width tune of space voltage vector
System) output.
SVPWM algorithm, which refers to, is sweared in each sector by two adjacent zero voltage space vectors and non-zero voltage space
The length of the turn-on time of switching and each vector between amount adjusts, to approach the voltage reference vector of rotation.Such as Fig. 5
It is shown, 360 degree of voltage space is divided into 60 degree of sectors, totally six sectors, and it is I, II that a sector will be stayed, which to number respectively,
III, IV, V, VI.Two zero voltage space vectors are respectively V0(000) and V7(111), six non-zero voltage space vector difference
For V1(001)、V2(010)、V3(011)、V4(100)、V5(101) and V6(110)。
Eight kinds of switching modes of inverter are corresponding with the space vector of eight voltage, i.e., each operating mode is exactly to export
An above-mentioned space vector.Here space vector of voltage is derived using 3/2 coordinate transform, it can transform to three-phase voltage
(α, β), such as formula (1) under coordinate:
The direction of α and β is as shown in figure 5, whereinV(SaSbSc) indicate space vector of voltage,
SaSbScIt is switch function, indicates that the output state of each phase bridge arm, U, V, W respectively indicate the U phase, V phase and W phase of three-phase electricity, j table
It gives instructions in reply several imaginary parts.
The different switching modes for substituting into inverter, pass through above-mentioned 3/2 coordinate transform, so that it may obtain space vector of voltage
Value.For generating vector V (110), when switch state is 110, refer to the triggering of circuit bridge, 1 represents upper bridge arm conducting, 0 table
Show that lower bridge arm is connected: U=udc/ 2, V=udc/ 2, W=-udc/ 2, UdcIndicate the voltage of DC bus.
Wherein there are six kinds of switching modes to correspond to non-zero voltage space, i.e. space vector of voltage, amplitude is
Realize that the step of SVPWM control is realized is as follows
A. judge sector locating for vector, sector N=A+2B+4C, in which:
If Uβ> 0, then A=1；Otherwise A=0.
IfThen B=1；Otherwise B=0.
IfThen C=1；Otherwise C=0.
Uα,UβIt is that component of the space vector of voltage value in reference frame (α, β) is obtained by above-mentioned 3/2 transformation.
B. according to sector allocation vector action time TXAnd TY, X, Y, Z are interlude variables, are convenient for assignment.TXAnd TYTable
Show adjacent two basic voltage vectors action time.
T in each sectorXAnd TYValue be shown in Table 1.
Table 1 action time parameter assignment table
The time of the adjacent two vectors effect in each sector, to follow the least principle of on-off times.
C. vectors switching point T is calculatedcm1、Tcm2And Tcm3
Definition:
Then in different sectors, each vectors switching point Tcm1、Tcm2And Tcm3Assignment selection be shown in Table 2:
The assignment table of 2 vectors switching point of table
The switching point time of each vector can be calculated according to table 2 and formula 4.
Purpose herein: it is to carry out three-phase output according to the control instruction that voltage vector is modulated, triangular carrier is by vector
Control system provides, and purpose seeks to control rotating excitation field with a certain angular frequency rotation needed, to realize control motor rotation；
In the natural sampling method of SPWM, common carrier signal is triangular carrier, which is ready-made power electronic technique.
By the three phase sine alternating current wave that SVPWM modulation can be such that ac voltage regulator output needs, complete to variable pitch
The control of motor.
When it is implemented, auxiliary drive device further includes accumulation power supply, accumulation power supply passes through DC bus and two-way inversion
Device connection, accumulation power supply and control module communication connection, the control method of assistant drive system further include:
When the voltage of accumulation power supply is lower than predeterminated voltage, the contact of control module control contactor, two-way inverter is to storage
It can power source charges；
When needing auxiliary drive device driving pitch motor and three phase mains power down, accumulation power supply is ac voltage regulator
Power supply.
When it is implemented, predeterminated voltage is 75 volts.
Default 75 volts are can be convenient and are connected thereto when needing to keep consistent with pitch-controlled system DC bus-bar voltage.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although passing through ginseng
According to the preferred embodiment of the present invention, invention has been described, it should be appreciated by those of ordinary skill in the art that can
To make various changes to it in the form and details, without departing from the present invention defined by the appended claims
Spirit and scope.
Claims (5)
1. a kind of assistant drive system of pitch-controlled system, including pitch motor, driver and control module, the driver and institute
State control module connection, which is characterized in that further include auxiliary drive device and switching device, in which:
The output end of the auxiliary drive device is in parallel by the input terminal of the switching device with the output end of the driver,
The output end of the switching device is connect with the pitch motor, the auxiliary drive device and the switching device respectively with institute
State control module communication connection；
When the control module detects that the driver works normally, the control module sends speed to the driver
Degree, direction instruction, the driver drive the pitch motor to operate according to the speed, direction instruction and oneself state, when
When the control module detects the driver no power or is powered in malfunction, the control module is to the switching
Device sends a high level fault signal, and the power supply of the pitch motor is switched to the auxiliary drive by the switching device
Device；
The auxiliary drive device includes contactor, two-way inverter and ac voltage regulator, in which:
Connected after the two-way inverter is in parallel with the input terminal of the ac voltage regulator by the contactor and three phase mains
It connects, output end of the output end of the ac voltage regulator as the auxiliary drive device；
The contactor and the control module communication connection；
The two-way inverter and the ac voltage regulator communication connection.
2. assistant drive system as described in claim 1, which is characterized in that the auxiliary drive device further includes energy storage electricity
Source, in which:
The accumulation power supply is connect by DC bus with the two-way inverter；
The accumulation power supply and the control module communication connection.
3. a kind of control method of the assistant drive system of pitch-controlled system, which is characterized in that become using as described in claim 1
The assistant drive system of oar system carries out auxiliary drive to the pitch motor, includes the following steps:
When the driver works normally, the control module, which controls the switching device, makes the driver and the variable pitch
Motor connection, the driver drive the pitch motor work；
When the driver no power or when breaking down, the control module, which controls the switching device, makes the auxiliary drive
Device is connected to the pitch motor, and the control module controls the auxiliary drive device and drives the pitch motor work；
The auxiliary drive device includes contactor, two-way inverter and ac voltage regulator, the two-way inverter with it is described
It is connect by the contactor with three phase mains after the input terminal of ac voltage regulator is in parallel, the output of the ac voltage regulator
Hold the output end as the auxiliary drive device, the contactor and the control module communication connection, the two-way inversion
Device and the ac voltage regulator communication connection, the control module control the auxiliary drive device and drive the pitch motor
Work includes:
The control module controls the contactor contact, make the two-way inverter and the ac voltage regulator respectively with institute
Three phase mains connection is stated, the two-way inverter controls the ac voltage regulator output using Realization of pulse width modulation based on voltage space vector
Alternating current frequency and phase, and then control steering and the revolving speed of the pitch motor.
4. the control method of assistant drive system as claimed in claim 3, which is characterized in that the auxiliary drive device also wraps
Accumulation power supply is included, the accumulation power supply is connect by DC bus with the two-way inverter, the accumulation power supply and the control
Molding block communication connection, the control method of the assistant drive system further include:
When the voltage of the accumulation power supply is lower than predeterminated voltage, the control module controls the contactor contact, described double
It charges to inverter to the accumulation power supply；
When needing the auxiliary drive device to drive the pitch motor and the three phase mains power down, the accumulation power supply is
The ac voltage regulator power supply.
5. the control method of assistant drive system as claimed in claim 4, which is characterized in that the predeterminated voltage is 75 volts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711395708.1A CN108131250B (en) | 2017-12-21 | 2017-12-21 | A kind of auxiliary drive device and its control method of pitch-controlled system |
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| CN201711395708.1A CN108131250B (en) | 2017-12-21 | 2017-12-21 | A kind of auxiliary drive device and its control method of pitch-controlled system |
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| CN108131250B true CN108131250B (en) | 2019-05-14 |
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| CN109826750B (en) * | 2019-01-25 | 2020-02-11 | 漳州科华技术有限责任公司 | Wind power variable pitch system and power supply method, power supply device and control module thereof |
| CN113586364B (en) * | 2021-08-27 | 2023-03-21 | 西安热工研究院有限公司 | Device, method and system for detecting yaw speed fault of fan yaw system |
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| US20110142634A1 (en) * | 2010-06-23 | 2011-06-16 | Detlef Menke | Overspeed protection system and method |
| DE102010060380B3 (en) * | 2010-11-05 | 2012-02-02 | Lti Drives Gmbh | Emergency-operated pitch motor drive circuit |
| CN102338032A (en) * | 2011-09-08 | 2012-02-01 | 江苏金风风电设备制造有限公司 | Electric blade-changing system of wind generating set |
| CN104295443A (en) * | 2013-07-16 | 2015-01-21 | 上海电气集团股份有限公司 | Wind power variable-pitch control system |
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