CN203201721U - Wind driven generator optimizing control system based on PI adjustment - Google Patents
Wind driven generator optimizing control system based on PI adjustment Download PDFInfo
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- CN203201721U CN203201721U CN2013201093324U CN201320109332U CN203201721U CN 203201721 U CN203201721 U CN 203201721U CN 2013201093324 U CN2013201093324 U CN 2013201093324U CN 201320109332 U CN201320109332 U CN 201320109332U CN 203201721 U CN203201721 U CN 203201721U
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- 230000007246 mechanism Effects 0.000 claims description 17
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- 238000000034 method Methods 0.000 abstract description 13
- 230000005611 electricity Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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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
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Abstract
The utility model discloses a wind driven generator optimizing control system based on PI adjustment. A wind driven generator yaw system is combined with a variable pitch control system, and a unified control method is adopted. When the wind speed is low, the yaw system automatically adjusts the windward direction of a fan to enable the fan to obtain the maximum wind energy. When the wind speed exceeds the rated wind speed, the variable pitch control system is started to adjust the pitch angle of a fan blade to enable the fan blade to operate in a position with the maximum power all the time.
Description
Technical field
The utility model belongs to the generation of electricity by new energy field, relates to wind generating technology, developmental technology of new energy resources in the intelligent grid, relates in particular to a kind of wind-driven generator optimization control system that regulates based on PI.
Background technique
Wind-power electricity generation shared proportion in electric power system increases day by day, and the abundant area of China's wind resource is distributed in the weak Midwest of electrical network relative thin more, and being incorporated into the power networks of a large amount of wind-powered electricity generation units brings great challenge to the normal operation that has electric power system now.
Yaw system is the distinctive control system of wind power generating set; mainly formed by driftage measurement, driftage driving drive part, knob cable protection device three parts; two functions of main realization; the one, make the cabin follow the tracks of the wind direction of vary stable, the 2nd, owing to causing the engine room inside cable to take place to twine, the effect of going off course automatically terminates winding.
The change oar operation of blower fan can be divided into two kinds of operating modes, the continuous change oar when namely normally moving and the all-cis oar under the halted state.When blower fan begins to start blade by 90 ° to 0 ° of direction rotate and when generating electricity by way of merging two or more grid systems near the adjusting of blade 0 ° all belong to continuous change oar.The continuous change oar process of hydraulic variable propeller system is to carry out position and speed control by the flow size of hydraulic proportion valve control hydraulic oil.When blower fan is shut down or during urgency, in order to stop blower fan rapidly, blade is quick rotation to 90 °, and the one, make wind direction parallel with blade, make blade lose the windward side; The 2nd, utilize blade laterally to pat air and brake, to reach the purpose of rapid shutdown, this process is called all-cis oar.
As operation power, hydraulic oil is as transmitting medium by electric hydraulic pump for hydraulic variable propeller system, and solenoid valve is as control unit, and the circular movement that becomes blade by the radial motion with the oil cylinder piston bar is realized the feather of blade.
Because characteristics such as the energy density of wind energy is low, random and unstability bring difficulty for the control technique problem of Large-scale Wind Turbines.
The model utility content
Problems such as the wind energy energy density is low in order to solve in the wind-power electricity generation process for the utility model, random and unstability provide a kind of yaw system and variable-pitch control system of adopting in wind-driven generator to realize the control system of blower fan jointly.
To achieve these goals, the utility model adopts following technological scheme.
A kind of wind-driven generator optimization control system that regulates based on PI comprises controller, latch, RAM, EPROM, wind vane, sensor, yaw system and pulp distance varying mechanism, and controller is connected with RAM by latch, and controller also directly is connected with RAM; Controller is connected with EPROM by latch, and controller also directly is connected with EPROM; Controller is connected with wind vane, wind vane measuring wind and wind direction; Controller is connected with two sensors, and two sensors are respectively applied to measure wind wheel angle and blade rotational speed; Controller is connected with pulp distance varying mechanism with yaw system respectively; Described controller adopts the PI controller.
A kind of wind-driven generator optimal control method of regulating based on PI, this method is controlled blower fan according to wind direction and wind speed size, and (1) only starts yaw system when wind speed during less than rated wind speed, yaw system is adjusted the blower fan direction of facining the wind automatically, makes blower fan obtain maximal wind-energy; (2) when wind speed during greater than rated wind speed, start yaw system and pulp distance varying mechanism simultaneously, pulp distance varying mechanism is adjusted the propeller pitch angle of fan blade, makes it maintain the operation of peak output place all the time; (3) excessive or when being in an emergency, emergency shutdown makes fan blade parallel with the wind direction direction when wind speed, with the protection blower fan.Under described (2) the kind situation, the PI controlling method is adopted in the control of pulp distance varying mechanism, carries out closed loop control.Be input as the generator power error value epsilon; Controller adopts pi regulator, is defined as: α=K
pε+K
tε, wherein K
pBe proportional component, K
tBe integral element, ε=P
Specified-P, P
SpecifiedBe generator rating power, P is the power of blower fan, and α ' is the real-time propeller pitch angle of wind wheel.
Under described (1) the kind situation, the yaw system controlling method is: the reference direction θ that wind wheel windward side normal direction at first is set
0(being set to 0 °), wind wheel windward side normal direction is θ
1, wind direction is θ
2(θ
1, θ
2Be on the clockwise direction differential seat angle with reference direction), threshold value Δ θ.Wind wheel windward side normal direction inceptive direction θ
1=θ
0, work as θ
2-θ
1During 〉=Δ θ, yaw system drives wind wheel and turns clockwise | θ
2-θ
1|; Work as θ
2-θ
1During≤-Δ θ, yaw system drives wind wheel and is rotated counterclockwise | θ
2-θ
1|.After rotation finishes, revise θ
1Value makes θ
1=θ
2
The utility model adopts wind vane to obtain wind direction and wind speed, and real-time information is passed to controller, and controller is controlled yaw system and the propeller pitch angle mechanism of system accordingly.It is consistent with wind direction that yaw system control motor remains the wind wheel direction.
The yaw system power source adopts threephase asynchronous, and actuator adopts gear structure, and transmission device is designed to hydraulic system.
When wind direction and angle of wind wheel axis runout, control system is after confirming after a while, and control driftage motor is adjusted to the orientation consistent with wind direction with wind wheel.
When wind speed surpasses the rated wind speed (being that power of fan surpasses rated power) that arranges, start pulp distance varying mechanism, pulp distance varying mechanism can adopt hydraulic pressure installation.
When wind speed excessive (generally surpass 50m/s) or when being in an emergency, the rapid rotating blading of pulp distance varying mechanism makes fan blade parallel with wind direction, and blower fan quits work, to protect blower fan.
The beneficial effects of the utility model: the utility model has not only been realized the maximum utilization of wind energy, has also improved the stability of output electric energy, has guaranteed the quality of power supply that distributed power source is incorporated into the power networks, and control procedure is simple, transition is mild, has a good application prospect.
Description of drawings
Fig. 1 is system architecture schematic diagram of the present utility model.
Fig. 2 is the control flow chart of the utility model wind speed when changing from small to big.
Fig. 3 is yaw system control flow chart of the present utility model.
Fig. 4 is feather control flow chart of the present utility model.
Wherein, 1, PI controller; 2, first latch; 3, RAM; 4, second latch; 5, EPROM; 6, wind vane; 7, first sensor; 8, second sensor; 9, yaw system; 10, pulp distance varying mechanism.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, a kind of wind-driven generator optimization control system that regulates based on PI comprises PI controller 1, first latch 2, RAM3, second latch 4, EPROM5, wind vane 6, first sensor 7, second sensor 8, yaw system 9 and pulp distance varying mechanism 10.
As PI controller 1, PI controller 1 input comprises wind speed, wind direction, wind wheel angle, blade rotational speed etc. to present embodiment based on the 80C592 chip, output comprise yaw motor angle of swing, need the propeller pitch angle of conversion etc.
As shown in Figure 2, when wind speed changed from small to big, the control flow of wind-driven generator was, when wind speed during less than rated wind speed, only started yaw system 9; When wind speed during greater than rated wind speed, start yaw system 9 and pulp distance varying mechanism 10 simultaneously; When wind speed is excessive, adopt the emergency shutdown strategy, make fan blade parallel with the wind direction direction, with the protection blower fan.
As shown in Figure 3, yaw system control algorithm flow process is that the reference direction θ of wind wheel windward side normal direction at first is set
0(being set to 0 °), wind wheel windward side normal direction is θ
1, wind direction is θ
2(θ
1, θ
2Be on the clockwise direction differential seat angle with reference direction), threshold value Δ θ.Wind wheel windward side normal direction inceptive direction θ
1=θ
0, work as θ
2-θ
1During 〉=Δ θ, yaw system 9 drives wind wheel and turns clockwise | θ
2-θ
1|; Work as θ
2-θ
1During≤-Δ θ, yaw system 9 drives wind wheel and is rotated counterclockwise | θ
2-θ
1|.After rotation finishes, revise θ
1Value makes θ
1=θ
2
If the power of blower fan is P, then
Wherein ρ is air density, and S is the inswept area of fan blade, C
p(λ α) is power coefficient, and λ is tip speed ratio, and α is propeller pitch angle, and v is wind speed, and as can be seen from the above equation, in the fan operation process, the factor that influences power of fan has two, power coefficient C
pWith wind speed v, wherein C
pRelevant with propeller pitch angle α with tip speed ratio λ, at this C is set
pWith the pass of λ, α be
E is the nature truth of a matter,
Accordingly as can be known, power P is only relevant with wind speed v with propeller pitch angle α.
As shown in Figure 4, wind speed reaches rated wind speed when above, and closed loop control is adopted in the control of pulp distance varying mechanism.Be input as the generator power error value epsilon; Because controller adopts pi regulator 1, is defined as: α=K
pε+K
tε, wherein K
pBe proportional component, K
tBe integral element, ε=P
Specified-P, P
SpecifiedBe generator rating power, P is the power of blower fan, and α ' is the real-time propeller pitch angle of wind wheel.
Though above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (3)
1. wind-driven generator optimization control system that regulates based on PI, it is characterized in that, comprise controller, latch, RAM, EPROM, wind vane, sensor, yaw system and pulp distance varying mechanism, controller is connected with RAM by latch, and controller also directly is connected with RAM; Controller is connected with EPROM by latch, and controller also directly is connected with EPROM; Controller is connected with wind vane, wind vane measuring wind and wind direction; Controller is connected with two sensors, and two sensors are respectively applied to measure wind wheel angle and blade rotational speed; Controller is connected with pulp distance varying mechanism with yaw system respectively; Described controller adopts the PI controller.
2. the wind-driven generator optimization control system that regulates based on PI as claimed in claim 1 is characterized in that, in the yaw system, power source adopts threephase asynchronous, and actuator adopts gear structure, and transmission device is designed to hydraulic system.
3. the wind-driven generator optimization control system that regulates based on PI as claimed in claim 1 is characterized in that, pulp distance varying mechanism adopts hydraulic pressure installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201093324U CN203201721U (en) | 2013-03-11 | 2013-03-11 | Wind driven generator optimizing control system based on PI adjustment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201093324U CN203201721U (en) | 2013-03-11 | 2013-03-11 | Wind driven generator optimizing control system based on PI adjustment |
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| Publication Number | Publication Date |
|---|---|
| CN203201721U true CN203201721U (en) | 2013-09-18 |
Family
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|---|---|---|---|
| CN2013201093324U Expired - Fee Related CN203201721U (en) | 2013-03-11 | 2013-03-11 | Wind driven generator optimizing control system based on PI adjustment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195651A (en) * | 2013-03-11 | 2013-07-10 | 山东电力集团公司济宁供电公司 | Wind power generator optimizing control system and control method based on PI (proportion integral) regulation |
| CN107131099A (en) * | 2017-05-27 | 2017-09-05 | 中国大唐集团科学技术研究院有限公司 | A kind of wind energy conversion system self-adaptation control method, device and wind energy conversion system |
| CN115199471A (en) * | 2022-06-24 | 2022-10-18 | 兰州理工大学 | Power control method and system based on yaw variable pitch linkage control load shedding |
-
2013
- 2013-03-11 CN CN2013201093324U patent/CN203201721U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195651A (en) * | 2013-03-11 | 2013-07-10 | 山东电力集团公司济宁供电公司 | Wind power generator optimizing control system and control method based on PI (proportion integral) regulation |
| CN103195651B (en) * | 2013-03-11 | 2015-09-23 | 山东电力集团公司济宁供电公司 | A kind of wind-driven generator Optimal Control System based on PI adjustment and controlling method |
| CN107131099A (en) * | 2017-05-27 | 2017-09-05 | 中国大唐集团科学技术研究院有限公司 | A kind of wind energy conversion system self-adaptation control method, device and wind energy conversion system |
| CN107131099B (en) * | 2017-05-27 | 2019-11-08 | 中国大唐集团科学技术研究院有限公司 | A kind of wind energy conversion system self-adaptation control method, device and wind energy conversion system |
| CN115199471A (en) * | 2022-06-24 | 2022-10-18 | 兰州理工大学 | Power control method and system based on yaw variable pitch linkage control load shedding |
| CN115199471B (en) * | 2022-06-24 | 2024-05-31 | 兰州理工大学 | Power control method and system for controlling load reduction based on yaw variable pitch linkage |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20160311 |
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| CF01 | Termination of patent right due to non-payment of annual fee |