CN106194603B - A kind of device and method of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency - Google Patents
A kind of device and method of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency Download PDFInfo
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- CN106194603B CN106194603B CN201610781702.7A CN201610781702A CN106194603B CN 106194603 B CN106194603 B CN 106194603B CN 201610781702 A CN201610781702 A CN 201610781702A CN 106194603 B CN106194603 B CN 106194603B
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Abstract
A kind of device and method of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency, the pedestal of device is fixed in test chamber, generator and torque rotational speed meters are packed on pedestal, torque rotational speed meters one end is connected with the first transmission shaft, wind wheel is packed on the first transmission shaft, and wind wheel is located at the upstream of test chamber direction of flow；The torque rotational speed meters other end is connected with second driving shaft, and the motor shaft of second driving shaft and generator is fixedly connected with；Power meter is connected with generator；The data output end of torque rotational speed meters and power meter is connected with computer；Slide rheostat is connected between power meter and generator, generator, power meter and slide rheostat constitute closed circuit, load of the slide rheostat as generator.Method is：It is rotated using incoming driving wind wheel under wind speed setting；Measure rotor shaft torque, rotating speed and generated output power；Data measured is transferred to be calculated in computer wind wheel pneumatic efficiency, wind energy conversion system complete machine and generator generating efficiency.
Description
Technical field
The invention belongs to wind energy conversion system aerodynamic characteristic and power characteristic technical field of measurement and test, more particularly to a kind of synchronism detection
The device and method of wind energy conversion system pneumatic efficiency and generating efficiency.
Background technology
Wind energy has become development and has applied most fast one of new energy, utilized as a kind of reproducible clean energy resource
The main equipment of wind energy is exactly wind energy conversion system, and wind wheel and generator are two important components of wind energy conversion system again, and wind wheel
The generating efficiency of pneumatic efficiency and generator directly determines the wind energy utilization efficiency of wind energy conversion system again, it is therefore desirable to the gas of wind wheel
The generating efficiency of efficiency of movement and generator is accurately tested, and is mainly realized at present by wind tunnel experiment.
Above-mentioned wind tunnel experiment can be divided into two kinds, the first is the wind-tunnel reality tested for the pneumatic efficiency of wind wheel
It tests, second is the wind tunnel experiment tested for the generating efficiency of wind energy conversion system complete machine, and two kinds of wind tunnel experiments are completely solely
Vertical progress.
For the wind tunnel experiment that the first is tested for the pneumatic efficiency of wind wheel, it is intended merely to assessment wind wheel
Design scheme quality degree；For the wind tunnel experiment tested for the generating efficiency of wind energy conversion system complete machine for second,
It can only measure the generating efficiency of wind energy conversion system complete machine, and can not measure the pneumatic efficiency of wind wheel and the generating efficiency of generator,
Therefore the generating efficiency of the pneumatic efficiency and generator of accurate evaluation wind wheel can not be also used for；Since the power generation of wind energy conversion system complete machine is imitated
Rate be by the pneumatic efficiency of wind wheel and the generating efficiency of generator match as a result, therefore also difficult by second of wind tunnel experiment
To solve generator matching problem.
Currently, the generating efficiency of generator can only be calculated by the data acquired in independent two kinds of wind tunnel experiments,
Since experimental facilities used by two kinds of wind tunnel experiments is different, will inevitably there is equipment error；Further more, even if two kinds of wind
The wind tunnel speed set in the experiment of hole is identical, but the adjusting of the wind tunnel speed in actual experiment can also have random error；Therefore,
Under the influence of many data errors, it is difficult to ensure that the accuracy of the generating efficiency of generator.Since wind tunnel experiment must be divided to two
Secondary independent progress, causes experimentation time-consuming and laborious, and conventional efficient is not high.
Invention content
In view of the problems of the existing technology, a kind of synchronism detection wind energy conversion system pneumatic efficiency of present invention offer and generating efficiency
Device and method, only by an experimentation can obtain simultaneously wind wheel pneumatic efficiency and wind energy conversion system complete machine power generation imitate
Rate effectively prevents using independent experiment twice and existing every error, not only ensure that the standard of the generating efficiency of generator
Exactness, and effectively increase conventional efficient.
To achieve the goals above, the present invention adopts the following technical scheme that：A kind of synchronism detection wind energy conversion system pneumatic efficiency and
The device of generating efficiency, including pedestal, wind wheel, generator, torque rotational speed meters and power meter；The pedestal is fixed at wind-tunnel
In test section, the generator and torque rotational speed meters are fixedly mounted on pedestal, and torque rotational speed meters one end is connected with the first transmission
Axis, the wind wheel are fixedly mounted on the first transmission shaft, and wind wheel is located at the upstream of test chamber direction of flow；The torque
The rotational speed meters other end is connected with second driving shaft, and the motor shaft of second driving shaft and generator is fixedly connected with by shaft coupling；It is described
Power meter is connected with generator；The data output end of the torque rotational speed meters and power meter is connected with computer.
Slide rheostat, the generator, power meter and sliding variable resistance are connected between the power meter and generator
Device constitutes closed circuit, load of the slide rheostat as generator.
It is mounted on bearing support block between first transmission shaft, second driving shaft and pedestal, by the way that bearing is arranged
Support base is preventing the malformation of the first transmission shaft, second driving shaft when rotated.
The longitudinal center line phase of first transmission shaft, second driving shaft, torque rotational speed meters, generator and test chamber
It overlaps.
A kind of method of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency uses the synchronism detection wind energy conversion system
The device of pneumatic efficiency and generating efficiency, includes the following steps：
Step 1：Wind speed in test chamber is set, and is turned using incoming driving wind wheel under wind speed setting
It is dynamic；
Step 2：The axis torque and rotating speed that wind wheel is measured by torque rotational speed meters, pass through the defeated of power meter measures generator
Go out power, it will be in the output power data transmission to computer of the axis torque and rotary speed data of wind wheel and generator；
Step 3：The pneumatic efficiency of wind wheel, the generating efficiency of wind energy conversion system complete machine and power generation is calculated using computer
The generating efficiency of machine.
Change the load of generator by changing the resistance of slide rheostat, and then changes turn of generator and wind wheel
Speed realizes the test of the wind energy conversion system pneumatic efficiency and generating efficiency under same wind speed and different rotating speeds.
The pneumatic efficiency of the wind wheel is evaluated by power coefficient with the change curve of tip-speed ratio, wind energy profit
Calculation formula with coefficient and tip-speed ratio is
Cp=2PM/ρAV3
λ=wR/V
Wherein, PM=2 π nM/60, in formula, PMFor wind wheel mechanical output, n is wind speed round, and M is rotor shaft torque, CPFor
Power coefficient, ρ are atmospheric density, and A is swept area of rotor, and V is arrives stream wind speed, and λ is tip-speed ratio, and w is wind wheel rotation angle
Degree speed, R are wind wheel radius of turn.
The calculation formula of the generating efficiency of the wind energy conversion system complete machine is
ηt=2PG/ρAV3
In formula, ηtFor wind energy conversion system complete machine generating efficiency, PGFor generated output power, ρ is atmospheric density, and A is rotor swept
Area, V are arrives stream wind speed.
The calculation formula of the generating efficiency of the generator is
ηg=ηt/Cp
In formula, ηgFor electrical power generators efficiency, ηtFor wind energy conversion system complete machine generating efficiency, CPFor power coefficient.
Beneficial effects of the present invention：
Compared with prior art, the present invention can only obtain the pneumatic efficiency and wind of wind wheel simultaneously by an experimentation
The generating efficiency of power machine complete machine effectively prevents using independent experiment twice and existing every error, not only ensure that power generation
The accuracy of the generating efficiency of machine, and effectively increase conventional efficient.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of a kind of the synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency of the present invention；
In figure, 1-pedestal, 2-wind wheels, 3-generators, 4-torque rotational speed meters, 5-power meters, 6-slide rheostats,
7-test chambers, the 8-the first transmission shaft, 9-second driving shafts, 10-shaft couplings, 11-bearing support blocks, 12-calculate
Machine.
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of device of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency, including pedestal 1, wind wheel 2,
Generator 3, torque rotational speed meters 4 and power meter 5；The pedestal 1 is fixed in test chamber 7, the generator 3 and torsion
Square rotational speed meters 4 are fixedly mounted on pedestal 1, and 4 one end of torque rotational speed meters is connected with the first transmission shaft 8, and the wind wheel 2 is fixedly mounted
On the first transmission shaft 8, and wind wheel 2 is located at the upstream of 7 direction of flow of test chamber；4 other end of torque rotational speed meters connects
It is connected to second driving shaft 9, second driving shaft 9 and the motor shaft of generator 3 are fixedly connected with by shaft coupling 10；The power meter 5 with
Generator 3 is connected；The data output end of the torque rotational speed meters 4 and power meter 5 is connected with computer 12.
Slide rheostat 6, the generator 3, power meter 5 and sliding are connected between the power meter 5 and generator 3
Rheostat 6 constitutes closed circuit, load of the slide rheostat 6 as generator 3.
It is mounted on bearing support block 11 between first transmission shaft 8, second driving shaft 9 and pedestal 1, passes through setting
Bearing support block 11 is preventing the first transmission shaft 8, the malformation of second driving shaft 9 when rotated.
First transmission shaft 8, second driving shaft 9, torque rotational speed meters 4, generator 3 and test chamber 7 axial direction in
Heart line coincides.
A kind of method of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency uses the synchronism detection wind energy conversion system
The device of pneumatic efficiency and generating efficiency, includes the following steps：
Step 1：Wind speed in test chamber 7 is set, and wind wheel 2 is driven using incoming under wind speed setting
Rotation；
Step 2：The axis torque and rotating speed that wind wheel 2 is measured by torque rotational speed meters 4 measure generator 3 by power meter 5
Output power, by the output power data transmission of the axis torque and rotary speed data of wind wheel 2 and generator 3 to computer 12
In；
Step 3：The pneumatic efficiency of wind wheel 2, the generating efficiency and hair of wind energy conversion system complete machine is calculated using computer 12
The generating efficiency of motor 3.
Change the load of generator 3 by changing the resistance of slide rheostat 6, and then changes generator 3 and wind wheel 2
Rotating speed realizes the test of the wind energy conversion system pneumatic efficiency and generating efficiency under same wind speed and different rotating speeds.
The pneumatic efficiency of the wind wheel 2 is evaluated by power coefficient with the change curve of tip-speed ratio, wind energy
The calculation formula of usage factor and tip-speed ratio is
Cp=2PM/ρAV3
λ=wR/V
Wherein, PM=2 π nM/60, in formula, PMFor wind wheel mechanical output, n is wind speed round, and M is rotor shaft torque, CPFor
Power coefficient, ρ are atmospheric density, and A is swept area of rotor, and V is arrives stream wind speed, and λ is tip-speed ratio, and w is wind wheel rotation angle
Degree speed, R are wind wheel radius of turn.
The calculation formula of the generating efficiency of the wind energy conversion system complete machine is
ηt=2PG/ρAV3
In formula, ηtFor wind energy conversion system complete machine generating efficiency, PGFor generated output power, ρ is atmospheric density, and A is rotor swept
Area, V are arrives stream wind speed.
The calculation formula of the generating efficiency of the generator 3 is
ηg=ηt/Cp
In formula, ηgFor electrical power generators efficiency, ηtFor wind energy conversion system complete machine generating efficiency, CPFor power coefficient.
Scheme in embodiment be not to limit the scope of patent protection of the present invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the claims of this case.
Claims (9)
1. a kind of device of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency, it is characterised in that：Including pedestal, wind wheel, hair
Motor, torque rotational speed meters and power meter；The pedestal is fixed in test chamber, the generator and torque rotational speed meters
It is fixedly mounted on pedestal, torque rotational speed meters one end is connected with the first transmission shaft, and the wind wheel is fixedly mounted on the first transmission shaft
On, and wind wheel is located at the upstream of test chamber direction of flow；The torque rotational speed meters other end is connected with second driving shaft, the
The motor shaft of two transmission shafts and generator is fixedly connected with by shaft coupling；The power meter is connected with generator；The torque axis
The data output end of fast instrument and power meter is connected with computer.
2. the device of a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 1, feature exist
In：Slide rheostat is connected between the power meter and generator, the generator, power meter and slide rheostat are constituted
Closed circuit, load of the slide rheostat as generator.
3. the device of a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 1 or 2, feature
It is：It is mounted on bearing support block between first transmission shaft, second driving shaft and pedestal, by the way that bearing support is arranged
Seat is preventing the malformation of the first transmission shaft, second driving shaft when rotated.
4. the device of a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 3, feature exist
In：First transmission shaft, second driving shaft, torque rotational speed meters, generator and test chamber longitudinal center line coincide.
5. a kind of method of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency, uses the same pacing described in claim 4
Try the device of wind energy conversion system pneumatic efficiency and generating efficiency, it is characterised in that include the following steps：
Step 1：Wind speed in test chamber is set, and is rotated using incoming driving wind wheel under wind speed setting；
Step 2：The axis torque and rotating speed that wind wheel is measured by torque rotational speed meters, pass through the output work of power meter measures generator
Rate, will be in the output power data transmission to computer of the axis torque and rotary speed data of wind wheel and generator；
Step 3：The pneumatic efficiency of wind wheel, the generating efficiency of wind energy conversion system complete machine and generator is calculated using computer
Generating efficiency.
6. the method for a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 5, feature exist
In：Change the load of generator by changing the resistance of slide rheostat, and then change the rotating speed of generator and wind wheel, realizes
The test of wind energy conversion system pneumatic efficiency and generating efficiency under same wind speed and different rotating speeds.
7. the method for a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 6, feature exist
In：The pneumatic efficiency of the wind wheel is evaluated by power coefficient with the change curve of tip-speed ratio, wind energy utilization system
It counts and the calculation formula of tip-speed ratio is
Cp=2PM/ρAV3
λ=wR/V
Wherein, PM=2 π nM/60, in formula, PMFor wind wheel mechanical output, n is wind speed round, and M is rotor shaft torque, CPFor wind energy
Usage factor, ρ are atmospheric density, and A is swept area of rotor, and V is arrives stream wind speed, and λ is tip-speed ratio, and w is wind wheel rotation angle speed,
R is wind wheel radius of turn.
8. the method for a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 7, feature exist
In：The calculation formula of the generating efficiency of the wind energy conversion system complete machine is
ηt=2PG/ρAV3
In formula, ηtFor wind energy conversion system complete machine generating efficiency, PGFor generated output power, ρ is atmospheric density, and A is rotor swept face
Product, V is arrives stream wind speed.
9. the method for a kind of synchronism detection wind energy conversion system pneumatic efficiency and generating efficiency according to claim 8, feature exist
In：The calculation formula of the generating efficiency of the generator is
ηg=ηt/Cp
In formula, ηgFor electrical power generators efficiency, ηtFor wind energy conversion system complete machine generating efficiency, CPFor power coefficient.
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Effective date of registration: 20210105 Address after: No.1667 Heping Street, Changchun City, Jilin Province, 130000 Patentee after: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID JILIN ELECTRIC POWER Co.,Ltd. Address before: 110136, Liaoning, Shenyang moral and Economic Development Zone, No. 37 South Avenue moral Patentee before: SHENYANG AEROSPACE University |