CN110173396A - A kind of electrical servo-control system of umbrella shape wind energy conversion system - Google Patents
A kind of electrical servo-control system of umbrella shape wind energy conversion system Download PDFInfo
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- CN110173396A CN110173396A CN201910575553.2A CN201910575553A CN110173396A CN 110173396 A CN110173396 A CN 110173396A CN 201910575553 A CN201910575553 A CN 201910575553A CN 110173396 A CN110173396 A CN 110173396A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 37
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 4
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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
- 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
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
-
- 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
- F03D7/0224—Adjusting blade pitch
-
- 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
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
- F03D7/0284—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power in relation to the state of the electric grid
-
- 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
- F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
- F03D7/044—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic with PID control
-
- 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 invention discloses a kind of electrical servo-control systems of umbrella shape wind energy conversion system, relate generally to technical field of wind power generation.Output numerical value is obtained for being monitored to the power output of umbrella shape wind energy conversion system in the process of running including monitoring unit；Negative-feedback measuring unit, connects and awards output numerical value, obtains the first feedback signal by signal processing；The driving signal for acquiring driving unit obtains the second feedback signal by signal processing；Control unit connects and awards the first feedback signal and the second feedback signal, resolves to control signal；Driving unit connects and awards control signal, and is converted to driving signal；Power unit connects and awards driving signal, exports mechanical energy corresponding with driving signal；Execution unit executes mechanical energy for the change to wind wheel leaf angle.The beneficial effects of the present invention are: the control method based on classic control algorithm meets a kind of power monitoring requirement of Wind turbines with umbrella shape regulating mechanism, has achieved the purpose that active power controls.
Description
Technical field
The present invention relates to technical field of wind power generation, the electrical servo-control system of specifically a kind of umbrella shape wind energy conversion system.
Background technique
Wind power generating set can be divided into active control and passive control according to control mode at present.
(1) active control: pitch-variable system is exactly to belong to active power control system, and wind power generating set has completely
Power output detection system, can be monitored in real time output power and compared with rated power, change blade pitch angle, to reach
Stablize the purpose of output power.But middle-size and small-size engine rooms of wind power generators is small in size, is not easy to installation unified variable propeller pitch system, so
Pitch-variable system is not suitable for middle-size and small-size wind-driven generator.Variable Eccentricity formula wind energy conversion system also belongs to active power control wind turbine
Group, it is that unit eccentricity is actively adjusted by servo-system, to change swept area of rotor, to reach control output power
Purpose.
(2) passive control: passive control refer mainly to by return type mechanical structure or using blade aerodynamic characteristic from
And control the control mode of output power.Mainly there is a backstroke power control on wind wheel, wind wheel lateral-deviation type power control and passive
Stall control.
From Wind turbines controller design level, control algolithm can be totally divided into two classes: classic control algorithm
And modern control algorithms.
(1) classic control algorithm: PID controller principle is simple and a variety of industrial PLC controllers (such as Siemens S7-300)
Integrated PID functional module, it is convenient to realize, is widely adopted in control field.PI or PID control are mostly used in Wind turbines
Device realizes wind speed, revolving speed, electrical power feedback control, become slowly suitable for working environment, uncertain and anti-interference it is weaker
Wind power system control.
(2) modern control algorithms: the modern control method of Wind turbines includes optimum control, robust control, sliding formwork change knot
Structure control, nonlinear autoregressive and intelligent control etc..
It solves the problems, such as that wind power system models uncertain and wind disturbance using Robust Control Algorithm, obtains good robustness
And stability.Consider load state, Multivariable Linear time-varying control device is devised based on LMI method, realizes full blast speed region
Pitch control.Method of geometry is combined with sliding-mode method, devises the multiple-input and multiple-output disturbance rejection control device of wind power system, together
Shi Shixian direct torque and the control target for maximizing wind energy utilization.
Nonlinear Intelligent control algolithm is the one kind received significant attention in modern control algorithms.Such algorithm directly against
The complexity of wind-powered electricity generation is fast to become nonlinear kinetics, overcomes system parameter uncertain using structure changes, from functions such as optimizing, dynamic compensation
The problem of property and nonlinear time-varying.
Middle-size and small-size wind power generating set generallys use fixed pitch structure, and the power control target of unit mainly realizes low wind
Can be issued under speed maximum power and high wind speed area can speed-limiting protection, and power control mode is concentrated mainly on passive control,
Output power is controlled by return type mechanical structure or using the aerodynamic characteristic of blade and protects unit in high wind speed area
It operates normally.
But power control mode existing at present mainly has low-response, the disadvantages of inaccurate is acted, especially in strong wind, battle array
When wind, even if passive control mechanism movement, the stabilization of output power and the operational safety of unit, fitful wind frequency cannot guarantee that
The area of hair also greatly increases the fatigue loss of mechanical structure, is less useful for the safe operation of unit.
Summary of the invention
The purpose of the present invention is to provide a kind of electrical servo-control systems of umbrella shape wind energy conversion system, it is calculated based on classic control
The control method of method meets a kind of power monitoring requirement of Wind turbines with umbrella shape regulating mechanism, has reached active function
The purpose of rate control.
The present invention to achieve the above object, is achieved through the following technical solutions:
A kind of electrical servo-control system of umbrella shape wind energy conversion system, comprising:
Monitoring unit obtains output numerical value for being monitored to the power output of umbrella shape wind energy conversion system in the process of running；
Negative-feedback measuring unit, connects and awards output numerical value, obtains the first feedback signal by signal processing；Acquire driving unit
Driving signal, pass through signal processing obtain the second feedback signal；
Control unit connects and awards the first feedback signal and the second feedback signal, resolves to control signal；
Driving unit connects and awards control signal, and is converted to driving signal；
Power unit connects and awards driving signal, exports mechanical energy corresponding with driving signal；
Execution unit executes mechanical energy for the change to wind wheel leaf angle.
Further, the output numerical value includes the output current value and/or voltage value of the generator of umbrella shape wind energy conversion system.
Further, described resolve includes:
First feedback signal is compared with the voltage threshold that the generator of setting works, when voltage value exceeds voltage threshold
When value, the driving signal that umbrella shape regulating mechanism can be made to adjust from 0 ° of position to 60 ° of positions is obtained；
When voltage value is not more than voltage threshold, the driving signal remained unchanged is obtained；
When the corresponding voltage value of the first feedback signal is 0, acquisition makes wind wheel angle of throat to the driving signal of home.
Further, the declared working condition range that setting umbrella shape wind energy conversion system works is 4.8V -5.2V, when the monitoring unit
When the operating condition voltage of the umbrella shape wind energy conversion system of acquisition is not within the scope of declared working condition, monitoring unit interval repetition in 3 seconds is to umbrella shape
The power output of wind energy conversion system in the process of running is monitored, when the operating condition voltage for the umbrella shape wind energy conversion system that the monitoring modular obtains
When twice in succession not within the scope of declared working condition, transmission output numerical value to negative-feedback measuring unit.
Further, after described control unit issues control signal 1 second, it is anti-that first is obtained from negative-feedback measuring unit again
Feedback signal.
Further, the monitoring unit uses current transformer and voltage transformer to umbrella shape wind energy conversion system in operational process
In power output be monitored；
Described control unit resolves control algolithm using PLC programmable logic controller,
The driving unit is motor driver, is connect with the output end of PLC programmable logic controller,
The power unit be servo motor, connect with the output end of electric machine controller, by motor driver control into
Row positive and negative rotation movement；
The positive and negative rotation of servo motor is acted, is executed to change to wind wheel leaf angle by machine driving by the execution unit
Become, impeller front face area is made to reduce to reduce power output.
The prior art is compared, the beneficial effects of the present invention are:
The present invention is further provided by the research of the Poewr control method of centering small-sized horizontal shaft wind-driven group
Make the Poewr control method of the wind power generating set of umbrella shape folding and unfolding movement suitable for blade.Pass through the research to power control scheme
The novel umbrella shape wind power generating set is set to can satisfy following demand:
(1) meet middle-size and small-size wind power generating set safe operation to require, real-time monitoring output power.
(2) meet variability weather, real-time monitoring, movement is accurately.
(3) meet safe operation of wind turbine standard requirements from far-off regions, movement frequency response is fast, and overload performance is excellent, has
Position limitation protection.
(4) meet power grid or user for power dispatching demand, i.e., the electrical power that issues of blower change with power load and
Become.
(5) full closed loop control is used, feedback is more timely, reduces machine driving back clearance, keeps system more stable, guarantees output work
Rate operates near rated power.
Detailed description of the invention
Attached drawing 1 is control logic block diagram of the invention.
Attached drawing 2 is servo-control system functional block diagram of the invention.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
A kind of embodiment 1: the electrical servo-control system of umbrella shape wind energy conversion system, comprising:
Monitoring unit, for being monitored to the power output of umbrella shape wind energy conversion system in the process of running, acquisition output numerical value,
The output numerical value includes the output current value and/or voltage value of the generator of umbrella shape wind energy conversion system.Specifically power detection device,
The power output of umbrella shape wind energy conversion system in the process of running is monitored using current transformer and voltage transformer.
When monitoring device detects that power signal exceeds or is less than setting value, second of detection can be carried out again after 3s, if
Power signal is still above or too small after 3s, and monitoring device, which issues signal to servo-system by negative-feedback measuring unit, makes screw thread
Mandril forward or after move, vanes retract angle increases or reduces.Influence this prevents fitful wind to whole system is guaranteeing
While wind energy conversion system is effectively run, the safe operating life of wind energy conversion system is extended.
Negative-feedback measuring unit, on the one hand connect with power detection device, anti-for providing signal for electric servo control
Feedback.On the one hand it is connect with servo controller, for providing signal feedback for electric servo control；
Control unit resolves control algolithm, outputs a control signal to electric-motor drive unit, is for servo controller
PLC programmable logic controller is connect with the output end of negative-feedback unit, is obtained by negative-feedback unit real-time come self generator
The corresponding signal feedback of the current value and voltage value of operating condition, realizes PID control, can carry out redundancy control to umbrella shape wind energy conversion system
System.Also, the signal from motor driver is obtained by negative-feedback unit to feed back, realize half-closed loop control, reduce error and improve
Control accuracy.
When voltage sensor is issued to PLC controller is more than the voltage signal of rated power, servo controller driving is watched
Motor action is taken, the angle of throat of wind wheel is adjusted, after rotor position is stablized (time delay, 1 second), PLC controller detects again
The voltage signal of sensor, determines whether umbrella shape regulating mechanism needs to continue to act.
Driving unit, specifically motor driver are connect with the output end of PLC programmable logic controller, are connect and are awarded control
Signal processed, and be converted to driving signal；For driving servo motor to carry out positive and negative rotation movement；
Power unit, specifically servo motor, connect with motor driver, control positive and negative rotation by motor driver
Make；
Execution unit acts on wind wheel fan blade, and the execution unit is by machine driving, when servo motor is by controller
When the signal of sending realizes positive and negative rotation, electric pushrod generates electronic thrust to threaded mandrel by the push-and-pull disk on guide rail, thus
Strut is driven, achievees the purpose that change leaf angle, impeller front face area is made to reduce to reduce power output.
The specific control method of above system is:
In umbrella shape wind energy conversion system operational process, wind energy conversion system power output monitoring device will be collected by negative-feedback measuring unit
Voltage value and current value be transferred to PLC editable controller, after the calculating and processing of editable controller, to motor drive
Dynamic device issues signal, device control servo motor rotation is driven by motor, so that the threaded mandrel of umbrella shape regulating mechanism be pushed to act.
Servo-control system acquires the parameter of various states in umbrella shape wind energy conversion system operation overall process, by editable controller to collecting
Signal calculated, analyzed, adjust the motion state of electric pushrod, be completed at the same time the adjustment to umbrella shape regulating mechanism.PLC is also
Energy detecting and controlling system makes accurate judgement to failure, improves the safety of umbrella shape turbine control system.
Specific setting voltage sensor operating voltage range is 0-5V, and the voltage signal of rated power point is 5V.Setting one
A declared working condition range 4.8V -5.2V, umbrella shape regulating mechanism is not required to act within the scope of this, when voltage signal is more than
When 5.2V, umbrella shape regulating mechanism starts to act from 0 ° of position to 60 ° of positions；
When negative-feedback measuring unit can't detect voltage signal, wind wheel angle of throat to home；
When motor drive module and servo motor power-off are powered again, umbrella shape regulating mechanism is moved to by final position
Initial position remembers initial position, while verifying umbrella shape regulating mechanism to work normally.
This exemplary servo-control system has following features:
(1) full closed loop control is used, fast, high reliablity is responded, there is very strong environmental suitability；
(2) to adjust mechanism action during stress condition analyze on the basis of, to electrical drive system into
It has gone simplified design, in conjunction with the servo control algorithm proposed, electrical drive system has been made not only to meet performance requirement, but also realize
Lightweight and miniaturization have certain reality in terms of using the small-sized wind power generator power control of umbrella shape regulating mechanism
Dissemination；
(3) movement of umbrella shape mechanism is the power signal by acquiring blower, and issues what instruction was realized by operation, function
Mechanism is failure to actuate when rate is lower than rated value.Compared with other power control modes, wind-driven generator is can be improved in this control mode
Working efficiency.
Claims (6)
1. a kind of electrical servo-control system of umbrella shape wind energy conversion system characterized by comprising
Monitoring unit obtains output numerical value for being monitored to the power output of umbrella shape wind energy conversion system in the process of running；
Negative-feedback measuring unit, connects and awards output numerical value, obtains the first feedback signal by signal processing；Acquire the drive of driving unit
Dynamic signal obtains the second feedback signal by signal processing；
Control unit connects and awards the first feedback signal and the second feedback signal, resolves to control signal；
Driving unit connects and awards control signal, and is converted to driving signal；
Power unit connects and awards driving signal, exports mechanical energy corresponding with driving signal；
Execution unit executes mechanical energy for the change to wind wheel leaf angle.
2. the electrical servo-control system of a kind of umbrella shape wind energy conversion system according to claim 1, which is characterized in that the output number
Value includes the output current value and/or voltage value of the generator of umbrella shape wind energy conversion system.
3. the electrical servo-control system of a kind of umbrella shape wind energy conversion system according to claim 1, which is characterized in that the resolving packet
It includes:
First feedback signal is compared with the voltage threshold that the generator of setting works, when voltage value exceeds voltage threshold
When, obtain the driving signal that umbrella shape regulating mechanism can be made to adjust from 0 ° of position to 60 ° of positions；
When voltage value is not more than voltage threshold, the driving signal remained unchanged is obtained；
When the corresponding voltage value of the first feedback signal is 0, acquisition makes wind wheel angle of throat to the driving signal of home.
4. the electrical servo-control system of a kind of umbrella shape wind energy conversion system according to claim 1, which is characterized in that setting umbrella shape wind
Power machine work declared working condition range be 4.8V -5.2V, when the monitoring unit obtain umbrella shape wind energy conversion system operating condition voltage not
When within the scope of declared working condition, power output of the monitoring unit interval repetition in 3 seconds to umbrella shape wind energy conversion system in the process of running
It is monitored, when the operating condition voltage for the umbrella shape wind energy conversion system that the monitoring modular obtains is not twice in succession within the scope of declared working condition
When, transmission output numerical value to negative-feedback measuring unit.
5. the electrical servo-control system of a kind of umbrella shape wind energy conversion system according to claim 1, which is characterized in that the control is single
After member issues control signal 1 second, the first feedback signal is obtained from negative-feedback measuring unit again.
6. the electrical servo-control system of a kind of umbrella shape wind energy conversion system according to claim 1, which is characterized in that the monitoring is single
Member is monitored the power output of umbrella shape wind energy conversion system in the process of running using current transformer and voltage transformer；
Described control unit resolves control algolithm using PLC programmable logic controller,
The driving unit is motor driver, is connect with the output end of PLC programmable logic controller,
The power unit is servo motor, is connect with the output end of electric machine controller, is carried out just by motor driver control
Reversion movement；
The execution unit is acted the positive and negative rotation of servo motor by machine driving, is executed as the change to wind wheel leaf angle, is made
Impeller front face area reduces to reduce power output.
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