A kind of wind-power electricity generation independent feathering control system based on TMS320F2812
Technical field
The present invention relates to a kind of wind-driven power generation control systems, send out more particularly to a kind of wind-force based on TMS320F2812
Electrically independent variable blade control system.
Background technique
In recent years, as becoming increasingly conspicuous for environmental problem is becoming tight with the day of energy supply, renewable energy increasingly by
People are paid attention to, and in the case where country greatly develops the guilding principle of new energy, wind generating technology is rapidly developed, still
Along with more and more running of wind generating set, problem also increases therewith, so how to ensure aerogenerator unit safe, reliable, height
The operation of effect is the direction of current wind-powered electricity generation industry primary study.Most important composition portion of the variable blade control system as wind-driven generator
One of part, system it is safe and reliable whether, directly affect security performance, the generating efficiency, power generating quality of entire blower
Etc., it suffices to say that variable blade control system occupies very important status in entire blower.
According to the function classification of variable blade control system, be mainly made of three parts: pitch control device, variable pitch driver,
Backup power source.Wherein pitch control device is as most important control unit, all logic controls, safeguard protection, backup power source
Switching, control algolithm etc. are by its completion.Country's variable blade control system is logical by Profibus only with a PLC at present
The mode of news bus extension I/O completes three all controls of blade, when main PLC has found any blade in the event of failure, it will disconnect
Theft-resistant link chain, all blades are performed both by emergency propeller retraction movement.But if main PLC once breaks down, such as theft-resistant link chain does not break
Open or power loss in the case where backup power source do not start etc., can all lead to the catastrophic failures such as driving.
It is respectively to synchronize variable pitch to become with independent there are mainly two types of control strategy in the algorithm design of current pitch-controlled system
Paddle.Synchronous variable pitch is that the propeller pitch angle of three blades synchronizes adjustment, has been generally used since its algorithm is simply easy to accomplish,
But under the conditions of certain wind regime, blade external force suffered by different positions is also different, will lead to three blade force unbalances, turns
The difference of square can reach 25% or so, to generate blower axial oscillation, not only influence service life of fan, while seriously affecting it
Generating efficiency.Therefore independent feathering control strategy causes the research of numerous researchers at present, but during independent pitch,
It needs individually to be controlled according to the Analysis of Dynamic Characteristics of each blade, control algolithm is slightly complicated, and propeller pitch angle is in paddle
Change in leaf rotary course very frequently, the requirement to response speed is relatively high, otherwise can in pitch process system it is steady
Property and validity cause significantly more influence.No matter which kind of control strategy is used, is provided to guarantee reasonably to control pitch
Angle is to reduce the balance of load between the oscillation of pylon and blade, to reduce the fatigue strength of wind energy conversion system, improves its generating efficiency.
With the research that the country deepens continuously to pitch-controlled system, function becomes increasingly complex, and safeguard protection is also more and more completeer
Kind, the demand to acquisition data is increasing, and increases considerably so as to cause control device and sensor, has in pitch control cabinet
How to realize that all safety protection functions, stable control are a problem to be solved in the space of limit.
For the above-mentioned existing variable blade control system practical application institute problem, a kind of high integration of researching and designing, height
Stability, the pitch control device of high scalability, thus meet pitch-controlled system deepen continuously development the needs of be very necessary.
Summary of the invention
The wind-power electricity generation independent feathering control system based on TMS320F2812 that the purpose of the present invention is to provide a kind of, this
The propeller pitch angle that invention reasonably controls blade can reduce the oscillation of pylon and the load of blade, to reduce the tired of wind energy conversion system
Lao Du extends the service life of wind energy conversion system.Electric pitch-changing control system obtains propeller pitch angle instruction by award setting device,
And then propeller pitch angle instruction is converted to the control signal of servo motor, the control to blade position is realized with this.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, the system comprises master control systems, alternating current electricity
Source, safety system, pitch control device, variable pitch driver, backup power source and motor;Wherein, variable blade control system passes through
Master control system, mains supply, safety system connection in the mode and cabin of electric slip ring, using CAN communication mode and master
The connection of control system;Pitch control device, variable pitch driver and backup power source are located in the pitch control cabinet in wheel hub;The variable pitch of blade
Controller one end is communicated by CAN and is connect with master control system, and the pitch control device of blade is communicated in real time, when any paddle
There is any failure in leaf, and another two blade is carried out and carries out mode of putting away the oars;The pitch control device other end of each blade passes through CAN
Communication is connect with variable pitch driver, reads blade physical location and practical variable pitch speed, and be sent to master control system;It supervises simultaneously
Control variable pitch driver slave station, redundancy angle encoder slave station and the communication state with master control system main website;If there is event in communication
Barrier, into emergency feathering mode;The digital quantity input/output module master control of pitch control device manually controls and the hand of variable pitch cabinet
Dynamic control, wherein manually controlling for variable pitch cabinet rotates blade arbitrarily, realizes zeroising function;Blade upper and lower limit is connected simultaneously
Position position switch signal guarantees that blade is run in safe range;The Analog input mModule of pitch control device is to propeller shank
Load transducer numerical value acquisition and analyze, the root load of three blades is compared, using the original of inside decoupling
Reason controls the propeller pitch angle of each blade;Wherein REDUNDANCY ENCODER, safety stop limit switch and safety limit switch are located at paddle
On the gear of leaf, load transducer is located at the root of blade;When safety limit switch triggering, blade is by emergency feathering;Work as peace
When full cut-off stops limit switch triggering, blade is by emergent stopping.
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, the variable pitch manually control,
The hand-held box that single-blade leaf is connected for DI unit, manually controls for completing variable pitch.
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, the load value of the blade
And the acquisition of variable pitch cabinet, backup power source cabinet, wheel hub temperature is the completion of AI unit;DO unit is used for the temperature acquired by AI unit
The calculating of angle value carries out the control of respective temperature, controls the logical of theft-resistant link chain by the judgement of master control system state and variable pitch state
It is disconnected, guarantee the safety of system.
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, the CAN main station unit with
Variable pitch driver is connected with the CAN of redundancy angle encoder.
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, the CAN slave station unit with
The CAN connection of master control system.
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, in the pitch control device
Increase loading analysis unit;The load target value and carry that loading analysis unit is transmitted by master control system (CAN communication)
The load value that lotus sensor is fed back constitutes a closed loop PID control circuit.
The advantages and effects of the present invention are:
The present invention solves the problems such as service life and safe operation of the existing influence unit of currently available technology, and structure is set
Rationally, pitch control is accurate for meter, and real time monitoring propeller pitch angle is adjusted, and while guaranteeing that blower stablizes output power, eliminates wind-powered electricity generation
The axial vibrations of unit wind wheel operation increase the link of protection of unit safety chain, effective to promote Wind turbines protective capability, make
The operation of Wind turbines is relatively reliable, stablizes.
Due to being located in the very narrow wheel hub in blower highest point, space, the quantity of design electric elements and volume by
In the case where limitation, by the pitch control device of independent research, under the premise of completing all pitch control required functions,
System is set to have the characteristics that high reliablity, maintainable high, integrated level height, failure rate are low.
Present invention employs each blades a pitch control device, changes current 3 blades and shares a PLC's
Control model optimizes system structure more, and operation is more flexible, while pitch control device is independently grinding using DSP as core
Send out controller, Function Extension is more abundant, and backup power source management, loading analysis etc. are effectively integrated, be system more
Add and stablizes, is safe.
Detailed description of the invention
Fig. 1 is the structural block diagram of wind-driven generator independent feathering control system of the invention;
Fig. 2 is single paddle control principle drawing of the invention;
Fig. 3 is variable pitch loading analysis cell schematics of the invention.
Specific embodiment
The following describes the present invention in detail with reference to examples.
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, including master control system, mains supply,
Safety system, pitch control device, variable pitch driver, backup power source and motor etc..Wherein, variable blade control system passes through electricity
Master control system, mains supply, safety system connection in the mode and cabin of slip ring, using CAN communication mode and master control
System connection.Pitch control device, variable pitch driver and backup power source are located in the pitch control cabinet in wheel hub.
The rate-determining steps of system are as follows:
1, pitch control device one end of each blade is communicated by CAN and is connect with master control system, for receiving the instruction of master control variable pitch
And the information of the current pitch-controlled system of feedback.The pitch control device of three blades is communicated in real time, when any blade is incumbent out
When why hindering, other two blade is carried out and carries out mode of putting away the oars, it is ensured that the safety of system;
2, the pitch control device other end of each blade is communicated by CAN and is connect with variable pitch driver, reads blade physical location
And practical variable pitch speed, and it is sent to master control system.Simultaneously monitor variable pitch driver slave station, redundancy angle encoder slave station with
And the communication state with master control system main website.If communication is broken down, into emergency feathering mode;
3, the digital quantity input/output module of pitch control device manually controls for realizing master control and variable pitch cabinet manually controls,
Wherein manually controlling for variable pitch cabinet can be such that blade arbitrarily rotates, and realize zeroising function.Blade upper and lower limits position is connected simultaneously
Switching signal is set, guarantees that blade is run in safe range;
4, the Analog input mModule of pitch control device carries out numerical value acquisition to the load transducer of propeller shank and analyzes, by 3
The root load of a blade is compared, and the propeller pitch angle of each blade is controlled using the principle of inside decoupling.Wherein redundancy encoding
Device, safety stop limit switch and safety limit switch are located on the gear of blade, and load transducer is located at the root of blade.
When safety limit switch triggering, blade is by emergency feathering;When the triggering of safety stop limit switch, blade is by emergent stopping.
Embodiment
A kind of wind-power electricity generation independent feathering control system based on TMS320F2812, mainly for wind-driven generator independence
Variable blade control system structure, pitch control device are designed.
The structural block diagram of variable blade control system is shown in Fig. 1, and variable blade control system of the invention is by way of electric slip ring and machine
Master control system, mains supply, safety system connection in cabin, are connect using CAN communication mode with master control system.Variable pitch control
Device, variable pitch driver and backup power source processed are located in the pitch control cabinet in wheel hub, wherein pitch control device, variable pitch driver,
Redundancy angle encoder is all made of CAN communication mode.
Pitch control device chief component in the present invention includes: using TI company's T MS320F2812 dsp chip as core
The control unit of the heart, the input of DI digital quantity, DO digital output, AI analog input, CAN slave station, CAN main website, power management
Module and load control unit etc., control principle is shown in Fig. 2.The wherein hand-held box of DI unit connection single-blade leaf, is used for
Variable pitch manually controls;AI unit is for the acquisition to blade aerodynamic load value and variable pitch cabinet, backup power source cabinet, wheel hub temperature;DO is mono-
The calculating of temperature value of the member for being acquired by AI unit carries out the control of respective temperature, by master control system state and variable pitch
The on-off of the judgement control theft-resistant link chain of state, guarantees the safety of system;CAN main station unit is used for and variable pitch driver and redundancy angle
Spend the CAN connection of encoder;CAN slave station unit with the CAN of master control system for connecting.
Fig. 3 is shown in the design of variable pitch loading analysis unit in the present invention.Since blower is in operational process, with the rotation of wheel hub
And the variation of propeller pitch angle, wind speed, the load that blade is born are also continually changing, such as when blade is located at wheel hub rotation water
The normal position of plane, blade is in when opening paddle state for 0 degree, and blade aerodynamic load is maximum value at this time, similarly, when blade is located at wheel
Hub rotate horizontal plane directly vertically below, blade be in 90 degree put away the oars state when, at this time blade aerodynamic load be minimum value, simultaneously because
The top of blade Plane of rotation and the lowermost wind speed are also different, and thus be will lead to the oscillation of pylon, are increased blower
The output power of degree of fatigue and blower is based on this, loading analysis unit is increased in pitch control device.Loading analysis list
The load value that the load target value and load transducer that member is transmitted by master control system (CAN communication) are fed back constitutes one
Closed loop PID control circuit, while the blade fed back according to current hub positions, the revolving speed of wheel hub and redundancy angle encoder
Angle value compensates operation, to calculate the load compensation propeller pitch angle of corresponding blade, then with master control
The pitch Angle Position that system is sentIt is superimposed, by the compensated blade set angle angle value of operationIt is sent respectively in corresponding pitch drive unit, is completed by respective executing agency
The compensation of propeller pitch angle reduces the oscillation in operational process, improves the whole of blower to ensure that the stress balance of entire blower
Body performance.
When operation:
1, system energization, pitch control device are communicated by CAN mode with master control system, and pitch control device receives respective paddle
Elongation, the control command of master control system and various breakdown judges, and current operating state information is fed back into master control system;
2, variable pitch driver is communicated by CAN mode with pitch control device, receives blade angle, variable pitch that pitch control device is sent
Velocity information executes variable pitch operational order, executes corresponding movement by pitch motor, and blade physical location and reality are become
Paddle velocity information is fed back to master control system;
3, realize that master control system manually controls, variable pitch cabinet manually controls using the digital quantity input/output module of pitch control device
With zeroising function;
4, the load transducer of propeller shank detects load value, and the analog quantity of numerical value income to pitch control device is defeated
Enter in modules A I, decoupling of the variable pitch load control unit through control algolithm is finely adjusted propeller pitch angle, is transmitted by CAN communication
To variable pitch driver, the control to blower is realized, and then adjust the propeller pitch angle of each blade.