CN102879199B - Full-condition wind turbine simulator - Google Patents
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- CN102879199B CN102879199B CN201210324748.8A CN201210324748A CN102879199B CN 102879199 B CN102879199 B CN 102879199B CN 201210324748 A CN201210324748 A CN 201210324748A CN 102879199 B CN102879199 B CN 102879199B
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Abstract
The invention relates to a full-condition wind turbine simulator comprising an upper computer monitor system for the wind turbine simulator, a characteristic simulating control system for a full-condition wind turbine and an electromechanical servo system for the wind turbine simulator. The upper computer monitor system for the wind turbine simulator sets operating parameters; the characteristic simulating control system for the full-condition wind turbine reads required data in each control cycle, operates simulation algorithms, and outputs torque commands to the drag converter of the electromechanical servo system for the wind turbine simulator; the drag converter controls a drag motor to output torques, and the operating characteristics of the wind turbine are simulated. The full-condition wind turbine simulator provided by the invention can simulate the dynamic and static characteristics of the full-condition operation of the wind turbine in a laboratory without wind field environment, and the full-condition wind turbine simulator is suitable for developing and researching wind power technique.
Description
Technical field
The present invention relates to a kind of Wind Turbine Simulator, be particularly applicable to the full operating mode Wind Turbine Simulator of double-fed type or direct driving speed-changing constant frequency wind-powered electricity generation simulation experiment platform.
Background technology
Wind energy is subject to the extensive attention of countries in the world day by day as a kind of regenerative resource; develop wind energy; greatly develop wind generating technology; for solving global energy crisis and environmental pollution, have great importance; at present in the world in topmost wind generating technology; variable-speed constant-frequency wind power generation technology is optimized technology, has become the developing direction of wind generating technology.
The checking of exploring in advance, study in laboratory plays important impetus to the development of wind generating technology.But due to the restriction of condition, most of laboratories do not have wind field environment or wind energy conversion system, and this is unfavorable for the checking of some new theories and new technology very much.In order to strengthen the research and development ability of wind generating technology, must carry out the research of wind energy conversion system analogue technique.Wind generator system is to be mechanical energy by wind energy transformation, then mechanical energy is converted into the Conversion of Energy system of electric energy.And the wind energy conversion system role that just to play the part of wind energy transformation in this system be mechanical energy is exactly the simulation of energy or torque therefore the simulation of wind energy conversion system is said in essence.By taking suitable control strategy, make the realistic feature of wind machine of whole wind energy conversion system simulation system, with it, drive aerogenerator, reach the effect of Reality simulation occurring in nature wind generator system work.Wind Turbine Simulator can, in the characteristic that does not rely on the situation Imitating wind energy conversion system of environment and wind energy conversion system, facilitate the research and development test of laboratory to wind generator system and parts thereof.
The most of mentality of designing that adopts transducer drive dragging motor of existing Wind Turbine Simulator, as shown in Figure 1, master system calculates the suitable torque instruction of output, by controlling frequency converter, export the operation characteristic that wind energy conversion system is simulated in different torques, but focus mostly on the research aspect qualitative in the simulation of feature of wind machine curve, maximal wind-energy capture experiment etc., the high-power unit output of actual wind field torque characteristics can not be accurately simulated, the full operating mode operation characteristic of wind energy conversion system can not be simulated; In addition, the most of wind speed inputs of existing Wind Turbine Simulator all come from anemoscope and measure, and the simulation of not integrated Variable Pitch system, this has equally also caused the accuracy inconvenient and simulation of experiment poor, this just can not the full operating mode operation characteristic of the actual wind-powered electricity generation unit of real simulation, thereby has affected experiment effect.
Summary of the invention
The object of the invention is to overcome existing Wind Turbine Simulator and only can carry out the research of qualitative aspect, shortcoming that can not the full operating mode operation characteristic of the actual physical environment apoplexy of real simulation group of motors, provides a kind of full operating mode Wind Turbine Simulator that is applicable to variable-speed constant-frequency wind power generation simulation experiment platform.The present invention can realize complete natural wind regime wind speed simulation, comprises fitful wind, basic wind, gradual change wind, turbulent flow etc., wind energy turbine set parameter also can be set simultaneously, reproduces the true wind regime of the actual wind field of nature completely.The present invention is based on parameter conversion, by torque modification, realized the characteristic of small scale Wind Turbine Simulator simulation high-power wind mill.The full operating mode Wind Turbine Simulator of the present invention is applied in wind-powered electricity generation unit simulation experiment platform, is an important component part in this experiment porch.In this experiment porch, except the full operating mode Wind Turbine Simulator of the present invention, also comprise wind-powered electricity generation unit master control system, current transformer, generator etc.On this experiment porch, can carry out the experimental verification of the exploitation of wind-powered electricity generation new industrial research and wind-powered electricity generation unit function.
The present invention is complete, and operating mode Wind Turbine Simulator mainly comprises three parts: Wind Turbine Simulator Monitor Computer Control System, full operating mode feature of wind machine analog control system and Wind Turbine Simulator electromechanical follow-up system.
Wind Turbine Simulator Monitor Computer Control System arranges operation initial parameter, by RS-232 serial ports, be transferred to full operating mode feature of wind machine analog control system, through full operating mode feature of wind machine analog control system computing, obtain real-time torque reference instruction, described real-time torque reference instruction is transferred to the frequency converter that drags in Wind Turbine Simulator electromechanical follow-up system by RS-485 communication interface, the described frequency converter that drags is controlled dragging motor output torque according to this real-time torque reference instruction, simulation wind energy conversion system operation characteristic.
Described Wind Turbine Simulator Monitor Computer Control System is comprised of industrial control computer, supervisory system and communication module, practical function mainly comprises full operating mode Wind Turbine Simulator system Control and Schedule, Wind Turbine Simulator parameter arranges, the conventional natural wind speed simulation of Wind Turbine Simulator etc.Described full operating mode feature of wind machine analog control system comprises PLC(Programmable Logic Controller) unit, signals collecting converter, Variable Pitch system simulation module and system protection functional module.Signals collecting converter Real-time Collection tach signal and dtc signal, change and be input to described PLC unit, through PLC cell processing, obtains exporting torque reference instruction.Variable Pitch system simulation module and system protection functional simulation module are carried out respectively propeller pitch angle output order and the system protection signal instruction of the wind-powered electricity generation unit master control system transmission of wind-powered electricity generation unit simulation experiment platform.Described Wind Turbine Simulator electromechanical follow-up system forms by dragging frequency converter, dragging motor, shaft coupling and torque rotary speed sensor, drag frequency converter and dragging motor electrical connection, dragging motor and shaft coupling mechanical connection, shaft coupling is arranged in dragging motor rotating shaft, and torque rotary speed sensor is arranged on shaft coupling.Drag after the torque reference instruction that frequency converter receives the output of full operating mode feature of wind machine analog control system, control dragging motor output torque.
The operation of the full operating mode Wind Turbine Simulator simulation of the present invention feature of wind machine comprises the following steps:
Step 1: first Wind Turbine Simulator Monitor Computer Control System carries out parameter setting, described parameter mainly comprises wind energy turbine set atmospheric density, wind turbine set type to be measured, wind-powered electricity generation unit rated power, wind-powered machine unit hub height, impeller of wind turbine set radius and simulated time yardstick, reads in the rated power curve that aerogenerator producer provides.Wind Turbine Simulator Monitor Computer Control System generates conventional natural wind speed curve automatically according to wind-powered electricity generation unit to be measured and environmental parameter, for reading in real time PLC unit.
Step 2: Wind Turbine Simulator Monitor Computer Control System carries out System self-test; check after errorless and send instructions in PLC unit; start Variable Pitch system simulation module, system protection functional simulation module in full operating mode feature of wind machine analog control system, in described PLC unit, start operation feature of wind machine modeling algorithm simultaneously.
Step 3: the unit parameter to be measured arranging according to step 1 carries out computing in the PLC unit of full operating mode feature of wind machine analog control system.The PLC unit of full operating mode feature of wind machine analog control system is at each control cycle T
sin, calculate in real time the equivalent wind speed disturbance v causing due to tower shadow effect and pneumatic shear effect
ed, by equivalent wind speed disturbance v
edthis control cycle T is added to
sin the described step 1 inside reading, on the routine nature wind speed curve data that Wind Turbine Simulator Monitor Computer Control System generates.
Step 4: the PLC unit of full operating mode feature of wind machine analog control system is theoretical according to pattra leaves thatch, calculates wind energy and the pneumatic torque of output that wind energy conversion system to be measured absorbs in real time, the mechanical output P that wind energy conversion system absorbs
mcan use following formula to represent:
In formula, C
pfor power coefficient, R is impeller radius, and v is wind speed, and ρ is atmospheric density.Power coefficient C
pfor the function of tip speed ratio λ and propeller pitch angle β, tip speed ratio λ is tip speed and wind speed v
windratio, expression formula is:
λ＝Rω/v
wind
Wherein, ω is wind mill wind wheel angular velocity of rotation, and further, wind energy conversion system is exported pneumatic torque T
mcan be drawn by following formula:
Use above-mentioned formula just can calculate in certain wind speed, the mechanical output that propeller pitch angle and wind speed round apparatus for lower wind machine absorb and export pneumatic torque.The periodic disturbance causing due to tower shadow effect and pneumatic shear effect has been converted to equivalent wind speed v
edbe superimposed upon in real time in step 1 in the routine nature wind speed curve generating, so the pneumatic torque of output must comprise the torque cycle pulsation that tower shadow effect and pneumatic shear effect cause, also realized the simulation of torque pulsation.
Step 5: consider that the moment of inertia of Wind Turbine Simulator, friction factor are different from actual blower fan, need to revise the torque of dragging motor output.After torque modification, the moment of inertia of compensation Wind Turbine Simulator, finally send revised real-time torque instruction to the frequency converter that drags of Wind Turbine Simulator electromechanical follow-up system, control dragging motor operation, enable real simulation high-power wind turbine machine unit characteristic.In each control cycle, the PLC unit of full operating mode feature of wind machine analog control system is by signals collecting converter Real-time Collection rotating speed, dtc signal simultaneously, and the correctness of torque is exported in checking.
Step 6: in a simulation cycle, Variable Pitch system simulation module and the circular flow always of system protection functional simulation module in full operating mode feature of wind machine analog control system, Variable Pitch system simulation module is carried out output propeller pitch angle according to propeller pitch angle instruction; Once it is output protection signal that simultaneity factor defencive function analog module detects any fault; Variable Pitch system simulation module starts to carry out emergency feathering; protection wind energy conversion system; avoid driving; and other functional modules of Wind Turbine Simulator continue operation; dynamic operational behaviour when this function also can be simulated wind energy conversion system fault and occurs, has reflected the characteristic of actual wind energy conversion system more really.
Beneficial effect of the present invention:
1) static and dynamic performance that the full operating mode Wind Turbine Simulator of variable speed constant frequency of the present invention can move in the full operating mode that does not rely on the situation Imitating wind energy conversion system of physical environment and wind energy conversion system;
2) wind speed simulation of the present invention adopts wind speed model synthetic method to realize, synthetic by basic wind, fitful wind, gradual change wind and turbulent flow according to the characteristic of natural wind, the periodic perturbation being caused by tower shadow effect and pneumatic shear effect is converted to equivalent wind speed disturbance and is superimposed upon on synthetic natural wind, has reproduced the true wind regime of the actual wind field of nature completely;
3) by simulator Monitor Computer Control System of the present invention, can set the actual operation parameters of the different blower fans of different wind fields, also the change curve of wind speed setting arbitrarily, greatly facilitates the research of laboratory to wind generator system;
4) simulation to Variable Pitch system that the full operating mode Wind Turbine Simulator of the present invention is simultaneously integrated, can be according to actual wind energy turbine set Variable Pitch system moving law action, when receiving fault-signal, can emergency feathering, prevent that wind energy conversion system from hypervelocity driving phenomenon occurring, can reflect really the characteristic of actual wind energy conversion system when full operating mode operation.
Accompanying drawing explanation
Fig. 1 is existing Wind Turbine Simulator structural drawing;
Fig. 2 is overall formation block diagram of the present invention;
Fig. 3 is wind speed simulation algorithm block diagram;
Fig. 4 is moment of inertia correction block diagram;
Fig. 5 is full operating mode wind energy conversion system simulation control block diagram;
Fig. 6 is the full operating mode Wind Turbine Simulator of the present invention operational flow diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 2, the full operating mode Wind Turbine Simulator of the present invention mainly comprises three parts: Wind Turbine Simulator Monitor Computer Control System, full operating mode feature of wind machine analog control system and Wind Turbine Simulator electromechanical follow-up system.Wind Turbine Simulator Monitor Computer Control System arranges operation initial parameter, by RS-232 serial ports, be transferred to full operating mode feature of wind machine analog control system, through full operating mode feature of wind machine analog control system computing, obtain real-time torque reference instruction, described real-time torque reference instruction is transferred to the frequency converter that drags in Wind Turbine Simulator electromechanical follow-up system by RS-485 communication interface, the described frequency converter that drags is controlled dragging motor output torque according to this real-time torque reference instruction, simulation wind energy conversion system operation characteristic, while torque and speed sensors output signal passes back to PLC unit by signals collecting converter and carries out instruction correction checking.
Described Wind Turbine Simulator Monitor Computer Control System is comprised of industrial control computer, supervisory system and communication module, practical function mainly comprises full operating mode Wind Turbine Simulator system Control and Schedule, Wind Turbine Simulator parameter arranges, the conventional natural wind speed simulation of Wind Turbine Simulator etc.Described full operating mode feature of wind machine analog control system comprises PLC(Programmable Logic Controller) unit and signals collecting converter, signals collecting converter Real-time Collection rotating speed, dtc signal, change and be input to PLC unit, in PLC unit, move feature of wind machine modeling algorithm, obtain exporting torque reference instruction.In described full operating mode feature of wind machine analog control system, comprise Variable Pitch system simulation module and system protection functional simulation module simultaneously; described Variable Pitch system simulation module and system protection functional simulation module are carried out respectively propeller pitch angle output order and the system protection signal instruction of the wind-powered electricity generation unit master control system transmission of wind-powered electricity generation unit simulation experiment platform, more real simulation feature of wind machine.Described Wind Turbine Simulator electromechanical follow-up system forms by dragging frequency converter, dragging motor, shaft coupling and torque rotary speed sensor, drag frequency converter and dragging motor electrical connection, dragging motor and shaft coupling mechanical connection, shaft coupling is arranged in dragging motor rotating shaft, torque rotary speed sensor is arranged on shaft coupling, drag after the torque reference instruction that frequency converter receives the output of full operating mode feature of wind machine analog control system, control dragging motor output torque.
Figure 3 shows that wind speed simulation algorithm block diagram.As shown in Figure 3, first Monitor Computer Control System carries out parameter setting, described parameter mainly comprises wind energy turbine set atmospheric density, wind turbine set type to be measured (double-fed or permanent magnetism), wind-powered electricity generation unit rated power, wind-powered machine unit hub height, impeller of wind turbine set radius and simulated time yardstick, read in the rated power curve that aerogenerator producer provides, supervisory system generates conventional natural wind speed curve automatically according to wind-powered electricity generation unit to be measured and environmental parameter, for full operating mode feature of wind machine analog control system, reads in real time.
The unit parameter to be measured completing according to setting carries out computing, at each control cycle T in the PLC unit of full operating mode feature of wind machine analog control system
sin, calculate in real time the equivalent wind speed disturbance v causing due to tower shadow effect and pneumatic shear effect
ed, this control cycle T is added to
sthe routine nature wind speed v inside reading
windon obtain the input wind speed v of torque simulation, that is:
v＝v
ed+v
wind
Obtain can in described PLC unit, calculating wind energy and the pneumatic torque of output that wind energy conversion system to be measured absorbs in real time according to pattra leaves thatch theory after real-time wind speed, the mechanical output of wind energy conversion system absorption can be used following formula to represent:
In formula, C
pfor Wind Power Utilization usage factor, R is impeller radius, and v is wind speed, and ρ is atmospheric density.Power coefficient C
pfor the function of tip speed ratio λ and propeller pitch angle β, power coefficient C
pexpression be:
λ wherein
ifor intermediate variable, its expression formula is:
Tip speed ratio λ is the ratio of tip speed and wind speed, and expression formula is:
λ＝Rω/v
Wherein, ω is wind mill wind wheel angular velocity of rotation, and further, wind energy conversion system is exported pneumatic torque T
mcan be drawn by following formula:
Use above-mentioned formula just can calculate in certain wind speed, the mechanical output that propeller pitch angle and wind speed round apparatus for lower wind machine absorb and export pneumatic torque.The periodic disturbance causing due to tower shadow effect and pneumatic shear effect has been converted to equivalent wind speed v
edbe superimposed upon in real time the routine nature wind speed v of generation
windupper, so the machine torque of output must comprise the torque cycle pulsation that tower shadow effect and pneumatic shear effect cause, also realized the simulation of torque pulsation.
Figure 4 shows that moment of inertia correction block diagram, moment of inertia, the friction factor of considering Wind Turbine Simulator are different from actual blower fan, actual wind energy conversion system moment of inertia is generally much larger than Wind Turbine Simulator system, for making Wind Turbine Simulator can accurately simulate the dynamic perfromance of wind energy conversion system, need to drag torque correction to simulator; Simultaneously at each control cycle T
sin, described PLC unit is by the correctness of signals collecting converter Real-time Collection rotating speed, dtc signal checking output torque.That is:
T
ref＝T
m+T
com
In formula, T
reffor the torque reference instruction of the final output of Wind Turbine Simulator, T
mfor the pneumatic torque calculating, T
comrepresent moment of inertia compensating torque.After torque modification, the moment of inertia of compensation Wind Turbine Simulator, finally send revised real-time torque instruction to the frequency converter that drags of Wind Turbine Simulator electromechanical follow-up system, control dragging motor operation, enable real simulation high-power wind turbine machine unit characteristic.
Figure 5 shows that full operating mode wind energy conversion system simulation control block diagram.By Wind Turbine Simulator Monitor Computer Control System, systematic parameter is set, comprise wind energy turbine set atmospheric density, wind turbine set type to be measured (double-fed or permanent magnetism), wind-powered electricity generation unit rated power, wind-powered machine unit hub height, impeller of wind turbine set radius and simulated time yardstick, read in the rated power curve that aerogenerator producer provides, supervisory system generates conventional natural wind speed curve automatically according to wind-powered electricity generation unit to be measured and environmental parameter, supplies the PLC unit of full operating mode feature of wind machine analog control system to read in real time.
In described PLC unit, move real time modelling algorithm.Each control cycle T
sin, by tower shadow/pneumatic shear effect equivalence modular converter, calculate in real time the equivalent wind speed disturbance v causing due to tower shadow effect and pneumatic shear effect
ed, this control cycle T is added to
sthe routine the having generated nature air speed data v inside reading
windupper, obtain resultant wind velocity v and be input in wind energy conversion system model.
Variable Pitch system simulation module in full operating mode feature of wind machine analog control system receives master control instruction and carries out propeller pitch angle β, then in conjunction with other wind energy conversion system parameters, by wind energy conversion system model, calculates current pneumatic torque T
m, consider that the moment of inertia of Wind Turbine Simulator, friction factor are different from actual blower fan, this pneumatic torque T
malso need to carry out correction-compensation, by large rotating inertia correction-compensation module, obtain correction-compensation torque T
com, finally obtain the given output torque reference instruction T that drags frequency converter
ref.
Described Variable Pitch system simulation module receives the propeller pitch angle instruction β of the wind-powered electricity generation unit master control system transmission of wind-powered electricity generation unit simulation experiment platform, when wind speed approaches incision and turns wind speed (being 3m/s) herein by instruction unpack blade, assisting wind generating set grid-connection, along with increasing, wind speed changes gradually propeller pitch angle, when wind speed surpasses wind rating (being 12m/s) herein, control propeller pitch angle and stablize wind energy conversion system rotating speed, now the present invention is complete, and operating mode Wind Turbine Simulator enters output-constant operation interval, when wind speed increases over cut-out wind speed (being 25m/s) herein, emergency feathering prevents driving, realize over-speed protection function.
Wind Turbine Simulator operation in a simulation cycle; Variable Pitch system simulation module and the circular flow always of system protection functional simulation module in full operating mode feature of wind machine analog control system; carry out respectively given propeller pitch angle output order and system protection signal instruction; once any fault be detected, start emergency feathering; protection wind energy conversion system; avoid driving; and other functional modules of Wind Turbine Simulator continue operation; dynamic operational behaviour when this function also can be simulated wind energy conversion system fault and occurs, has reflected the characteristic of actual wind energy conversion system more really.
Figure 6 shows that the full operating mode Wind Turbine Simulator of the present invention operational flow diagram, start after full operating mode Wind Turbine Simulator, first by Wind Turbine Simulator Monitor Computer Control System, simulator operational factor is set, comprise simulated wind energy turbine set and the parameter of wind energy conversion system, the operational factor having arranged arrives full operating mode feature of wind machine analog control system by communication transfer.Receive and move modeling algorithm after the signals such as Wind Turbine Simulator Monitor Computer Control System transmission information, propeller pitch angle signal and rotational speed and torque and calculate wind energy conversion system and export pneumatic torque T
m, through large rotating inertia correction-compensation T
comobtain torque reference instruction T
refsend to and drag frequency converter, drag Frequency Converter Control dragging motor output torque simulation wind energy conversion system operation characteristic.
In sum, the full operating mode Wind Turbine Simulator of the present invention can not rely on the dynamic and static characteristic of situation Imitating wind energy conversion system of physical environment and wind energy conversion system, can simulate the wind energy conversion system of different qualities simultaneously, and the change curve of any wind speed setting of energy; Wind speed simulation adopts wind speed model synthetic method to realize, synthetic by basic wind, fitful wind, gradual change wind and turbulent flow according to the characteristic of natural wind, the periodic perturbation being caused by tower shadow effect and pneumatic shear effect is converted to equivalent wind speed disturbance and is superimposed upon on synthetic natural wind, has reproduced the true wind regime of the actual wind field of nature completely; Specific wind energy turbine set environmental parameter and wind energy conversion system parameter can be set, the simultaneously integrated simulation to Variable Pitch system, can be according to actual wind energy turbine set wind-powered electricity generation unit Variable Pitch system moving law action, when receiving fault starting signal, can emergency feathering, prevent that wind energy conversion system from hypervelocity driving phenomenon occurring, can reflect really the characteristic of actual wind energy conversion system when full operating mode operation, simulate more accurately feature of wind machine.The research cycle of wind generating technology has greatly been shortened in the application of wind energy conversion system analogue technique, the full operating mode Wind Turbine Simulator of the present invention has facilitated the research of laboratory to wind generator system, for the research and development of wind-power electricity generation new technology, checking, maximal wind-energy Tracing Control and the control algolithm of improving have been created favourable condition.
Claims (1)
1. a full operating mode Wind Turbine Simulator, described Wind Turbine Simulator comprises three parts: Wind Turbine Simulator Monitor Computer Control System, full operating mode feature of wind machine analog control system and Wind Turbine Simulator electromechanical follow-up system; Described Wind Turbine Simulator Monitor Computer Control System is comprised of industrial control computer, supervisory system and communication module, be used for realizing full operating mode Wind Turbine Simulator system Control and Schedule, Wind Turbine Simulator parameter arranges, the conventional natural wind speed analog functuion of Wind Turbine Simulator; Described full operating mode feature of wind machine analog control system comprises PLC unit, signals collecting converter, Variable Pitch system simulation module and system protection functional simulation module; Signals collecting converter Real-time Collection is also changed tach signal and dtc signal, is transferred in PLC unit, through PLC cell processing, obtains exporting torque reference instruction; Variable Pitch system simulation module and system protection functional simulation module are carried out respectively propeller pitch angle instruction and the system protection signal instruction of the wind-powered electricity generation unit master control system transmission of wind-powered electricity generation unit simulation experiment platform; Described Wind Turbine Simulator electromechanical follow-up system forms by dragging frequency converter, dragging motor, shaft coupling and torque rotary speed sensor, drag frequency converter and dragging motor electrical connection, dragging motor and shaft coupling mechanical connection, shaft coupling is arranged in dragging motor rotating shaft, torque rotary speed sensor is arranged on shaft coupling, described dragging after the torque reference instruction that frequency converter receives full operating mode feature of wind machine analog control system output, control dragging motor output torque, simulation wind energy conversion system operation characteristic
Wind Turbine Simulator described in it is characterized in that is simulated feature of wind machine operation according to the following steps:
Step 1: first described Wind Turbine Simulator Monitor Computer Control System carries out parameter setting, and described parameter comprises wind energy turbine set atmospheric density, wind turbine set type to be measured, wind-powered electricity generation unit rated power, wind-powered machine unit hub height, impeller of wind turbine set radius and simulated time yardstick; Described Wind Turbine Simulator Monitor Computer Control System reads in the rated power curve that aerogenerator producer provides, described Wind Turbine Simulator Monitor Computer Control System generates conventional natural wind speed curve automatically according to wind-powered electricity generation unit to be measured and environmental parameter, for reading in real time described PLC unit;
Step 2: described Wind Turbine Simulator Monitor Computer Control System carries out System self-test, check after errorless and send instructions in described PLC unit, start described Variable Pitch system simulation module and system protection functional simulation module, in described PLC unit, move feature of wind machine modeling algorithm simultaneously;
Step 3: the wind-powered electricity generation unit parameter to be measured that described PLC unit arranges according to step 1, at each control cycle T
sin, calculate in real time the equivalent wind speed disturbance v causing due to tower shadow effect and pneumatic shear effect
ed, by equivalent wind speed disturbance v
edthis control cycle T is added to
son the routine nature wind speed curve data generating in the step 1 inside reading;
Step 4: described PLC unit is theoretical according to pattra leaves thatch, calculates wind energy and the pneumatic torque of output that wind energy conversion system to be measured absorbs in real time, the mechanical output P that wind energy conversion system absorbs
muse following formula to represent:
C wherein
pfor power coefficient, R is wind turbine impeller radius, and v is wind speed, and ρ is atmospheric density; Power coefficient C
pfor the function of tip speed ratio λ and propeller pitch angle β, tip speed ratio λ is the ratio of tip speed and wind speed, and expression formula is:
λ＝Rω/v
wind
Wherein, ω is wind mill wind wheel angular velocity of rotation, and further, wind energy conversion system is exported pneumatic torque T
mby following formula, drawn:
Step 5: the torque to dragging motor output is revised, after torque modification, the moment of inertia of compensation Wind Turbine Simulator, finally sends revised real-time torque instruction to the described frequency converter that drags, and controls dragging motor operation, simulation feature of wind machine; Meanwhile, in each control cycle, described PLC unit is by signals collecting converter Real-time Collection rotating speed, dtc signal, and the correctness of torque is exported in checking;
Step 6: in a simulation cycle; described Variable Pitch system simulation module and the circular flow of system protection functional simulation module; carry out respectively given propeller pitch angle output order and system protection signal instruction; once any fault be detected, start emergency feathering; protection wind energy conversion system, avoids driving.
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| CN103226365B (en) * | 2013-03-06 | 2015-02-18 | 浙江运达风电股份有限公司 | Control method and device of wind turbine simulation system and wind turbine simulation system |
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