CN104535928A - Simulator stand and state monitoring device for direct-driven wind turbine generator - Google Patents
Simulator stand and state monitoring device for direct-driven wind turbine generator Download PDFInfo
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- CN104535928A CN104535928A CN201510050436.6A CN201510050436A CN104535928A CN 104535928 A CN104535928 A CN 104535928A CN 201510050436 A CN201510050436 A CN 201510050436A CN 104535928 A CN104535928 A CN 104535928A
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Abstract
The invention belongs to the field of state monitoring and fault diagnosis of renewable energy equipment, in particular relates to a simulator stand and a state monitoring device for a direct-driven wind turbine generator, and aims to research operation characteristics and failure mechanism of the direct-driven wind turbine generator and analyze a representation relation between a vibration signal as well as an electric signal and an operation fault of the wind turbine generator. The speed of an asynchronous motor is reduced by virtue of a gearbox and the asynchronous motor is used as a power input of the direct-driven wind turbine generator; the power is transmitted to the direct-driven wind turbine generator through a connecting flange so as to drive a permanent-magnet type external rotor to rotate; a coil mounted on a central shaft of the generator is used as a stator to be fixed and immovable, and the electric energy is transmitted to grid. The direct-driven wind turbine generator adopts a cantilever structure, piezoelectricity acceleration sensors are mounted on a front bearing and a rear bearing of the cantilever structure so as to monitor the state of the bearings; a torquemeter for simultaneously monitoring torque and rotation speed of a transmission chain is arranged on the power input part; a three-phase voltage and current inductor is mounted on a grid combining side of the generator. By analyzing the signals, the operation characteristics and failure mechanism of the direct-driven wind turbine generator can be researched, and a theoretical foundation is provided for operation and maintenance of a real unit.
Description
Technical field
The invention belongs to resource equipment condition monitoring and fault diagnosis field, be specifically related to a kind of direct-drive aerogenerator simulator stand and state monitoring apparatus.
Background technology
Horizontal axis wind-driven generator mainly comprises two kinds of types: the band double-fed asynchronous generator of gear case and the direct-drive aerogenerator of non-gear box.At present, direct-drive aerogenerator accounts for 1/4 of installed capacity of wind-driven power, along with the increase gradually of wind-powered electricity generation single-machine capacity, direct-drive type unit will become the mainstream model of large-scale wind electricity unit because of features such as its driving-chain is simple, compact conformations, owing to not having epicyclic gearbox as increasing transmission, direct-drive type unit is considered to the lower a kind of type of failure rate.But in actual motion, the complete forward end bearing of blade gravity of direct-drive aerogenerator supports, the impact of RANDOM WIND load is also direct to be born by generator, whole unit is cantilever design, once spring bearing breaks down, will directly cause power generator air gap eccentric, affect generating efficiency, cause generator unit stator and rotor grazing time serious, destroy whole unit, its economic loss is larger than the loss of double-fed type set gear box induced fault.
Aerogenerator be often arranged on field far from ground tens of rice even height of up to a hundred meters aerial, experience extreme difference in temperature, random load, running environment is severe.On-the-spot duty personnel carries out the pattern that the maintenance of unit is is mainly patrolled and examined by regular climbing tower, to the running status of unit, possible breakdown mechanism is known little about it, although some Wind turbines has installed on-line condition monitoring and fault diagnosis system at present, on-the-spot vibration data can be sent to remote diagnostic center by network, remote analysis and process is carried out by expert, but the control of this kind of pattern shortage to unit excitation load, be difficult to determine fault degree by vibration signal, lack the effective tracking to physical fault and feedback, easily cause the unfavorable phenomenon that wind energy turbine set running status and analysis result disconnect mutually.
In view of above-mentioned consideration, the development of direct wind-driven generator simulator stand and state monitoring apparatus is most important.Reason is: test bed testing can provide as far as possible close to the running environment of actual direct-drive aerogenerator, by simulating various operation troubles, comprise the Internal and external cycle of spring bearing, rolling body, retainer fault, the imbalance of wind wheel, the phase fault of generator, bias etc., analyze vibration signal and the parameter such as voltage, electric current, set up accurate characterization of relation between fault degree and monitor signal, for the status monitoring of actual direct-drive aerogenerator, Precise Diagnosis and operation maintenance provide theoretical foundation.
Summary of the invention
The present invention is based on above-mentioned situation, a kind of simulator stand for direct-drive aerogenerator and state monitoring apparatus thereof are provided.
The present invention includes following content:
(1) in Fig. 1, threephase asynchronous 1, planetary reduction gear 3, torque gauge (velocity gauge) 4 are connected by shaft coupling 2, torque gauge 4 and permanent-magnetic outer rotor generator are connected by connecting flange 5, common composition direct-drive aerogenerator simulator stand;
(2) direct-drive aerogenerator adopts permanent-magnetic outer rotor structure, cantilever support, to improve the magnetic energy of unit volume;
(3) rotor sleeve 7, rotor 8 and permanent magnet 9 form rotor, and stator axis 18, stator core 10 and stator coil 11 form stator, and direct drive permanent magnetic outer rotor generator is made up of rotor, stator and spring bearing 15 (16);
(4) threephase asynchronous adopts frequency converter timing, and the power after planetary reduction gear slows down can simulate the external drive of actual variable speed, variable load.Planetary reduction gear compact conformation, can provide larger reduction gear ratio, to adapt to the low speed input of direct wind-driven generator;
(5) input end of permanent-magnetic outer rotor generator can increase and decrease counterweight 6, to simulate heavy duty and the non-equilibrium state of actual wind electricity blade;
(6) synchronous pickup is from the status signal of vibration transducer 17, torque gauge 4 (rotating speed, moment of torsion), voltage transformer (VT) 13 summation current transformer 14, and the analysis and treament of various types of signal can provide fast diagnosis method for the bearing fault of direct-drive aerogenerator, electric fault.
Beneficial effect of the present invention is:
(1) the invention provides the design feature for direct-drive aerogenerator, reduced scale testing table is provided, can the operating condition of the actual aerogenerator of comprehensive simulated: 1. by the method that asynchronous motor is combined with planetary reduction gear, provide the outside input of low speed, heavy duty; 2. the mode of counterweight is installed, the heavy duty of simulation wind electricity blade and non-equilibrium state by input end; 3. pilot channel generator is substantially identical with actual direct-drive aerogenerator structure, and test result is close to actual.
(2) for direct wind-driven generator provides the support in comprehensive condition monitoring and fault diagnosis method.By simulating various machinery or electric fault on testing table, easily set up the characterization of relation of unit failure degree and vibration signal, electric signal, multiple advanced fault signature can be carried out simultaneously and extract the checking with diagnostic method, for the Precise Diagnosis of actual set provides foundation.
Accompanying drawing explanation
Fig. 1 is direct wind-driven generator simulator stand and state monitoring apparatus schematic diagram;
Fig. 2 is signal under bearing normal condition and malfunction and Characteristic Contrast.Left a: normal condition vibration signal, left b: malfunction vibration signal, right a: the cepstrum of normal condition, right b: the cepstrum of malfunction;
Fig. 3 is left for there being the Characteristic Contrast extracted during non-fault under different operating condition; Fig. 3 right side is retainer fault picture.
Embodiment
The invention provides a kind of direct wind-driven generator simulator stand and state monitoring apparatus, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
(1) artificial certain fault of manufacture on generator main bearing, is retainer burn in this example, because testing table is modular construction, is convenient to dismounting, respectively normal bearing and retainer faulty bearings is arranged on test platform and tests;
(2) gather acceleration vibration signal to analyze, the left a of Fig. 2 is the acceleration signal of normal condition, acceleration signal when the left b of Fig. 2 is retainer burn;
(3) original acceleration signal is processed, as Fig. 2 right side is depicted as corresponding cepstrum signal (the right a of Fig. 2 is the cepstrum of normal signal, the cepstrum of signal when the right b of Fig. 2 is retainer burn).Amplitude during extraction 0.358s is as fault signature;
(4) operation characteristic that aerogenerator one is important is variable working condition, the nine kind different running statuses of further simulation under same malfunction, change input speed and load mainly through frequency control, under nine kinds of states, normal contrast with fault signature sees Fig. 3 left side.Can find that fault and normal characteristics difference fluctuate not quite, illustrate that cepstrum technology is extracted fault signature and substantially do not affected by operating condition, respond well;
(5) the dynamo bearing retainer burn fault simulated is as shown in Fig. 3 right side.
In actual enforcement, various faults such as comprising bearing, generator unit stator, rotor, coil can be simulated, and can vibration, voltage, current signal parallel parsing be passed through.
Claims (6)
1. direct wind-driven generator simulator stand and state monitoring apparatus, it is characterized in that: threephase asynchronous 1, planetary reduction gear 3, torque gauge (velocity gauge) 4 are connected by shaft coupling 2, torque gauge 4 and permanent-magnetic outer rotor generator are connected by connecting flange 5, common composition direct-drive aerogenerator simulator stand.
2. direct wind-driven generator simulator stand and state monitoring apparatus according to claim 1, is characterized in that direct-drive aerogenerator adopts permanent-magnetic outer rotor structure, cantilever support, to improve the magnetic energy of unit volume.
3. direct wind-driven generator simulator stand and state monitoring apparatus according to claim 1, it is characterized in that rotor sleeve 7, rotor 8 and permanent magnet 9 form rotor, stator axis 18, stator core 10 and stator coil 11 form stator, and direct drive generator is made up of rotor, stator and spring bearing 15 (16).
4. direct wind-driven generator simulator stand and state monitoring apparatus according to claim 1, it is characterized in that threephase asynchronous adopts frequency converter timing, the power after planetary reduction gear slows down can simulate the external drive of actual variable speed, variable load; Planetary reduction gear compact conformation, can provide larger reduction gear ratio, to adapt to the low speed input of direct wind-driven generator.
5. direct wind-driven generator simulator stand and state monitoring apparatus according to claim 1, is characterized in that the input end of direct drive generator can increase and decrease counterweight 6, to simulate heavy duty and the non-equilibrium state of actual wind electricity blade.
6. direct wind-driven generator simulator stand and state monitoring apparatus according to claim 1, it is characterized in that can synchronously picking up multi-signal from vibration transducer 17, torque gauge 4 (rotating speed, moment of torsion), voltage transformer (VT) 13 summation current transformer 14 etc., the analysis and treament of various types of signal can provide fast diagnosis method for the bearing fault of direct-drive aerogenerator, electric fault.
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| CN201510050436.6A CN104535928B (en) | 2015-02-02 | 2015-02-02 | Direct wind-driven generator simulator stand and state monitoring apparatus |
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| CN201510050436.6A CN104535928B (en) | 2015-02-02 | 2015-02-02 | Direct wind-driven generator simulator stand and state monitoring apparatus |
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| CN105866614A (en) * | 2016-06-06 | 2016-08-17 | 哈尔滨电机厂有限责任公司 | Device for detecting three-phase sudden shorting of turbine generator |
| CN108132192A (en) * | 2017-12-29 | 2018-06-08 | 北京金风科创风电设备有限公司 | Generator rotor magnetic pole simulation testing device |
| CN109342946A (en) * | 2018-11-30 | 2019-02-15 | 冶金自动化研究设计院 | A kind of universal open type outer-rotor permanent magnet motor experimental rig |
| CN110596504A (en) * | 2019-10-24 | 2019-12-20 | 中铁十局集团电务工程有限公司 | Indoor simulation test device for hump signal speed reducer |
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| CN108132192A (en) * | 2017-12-29 | 2018-06-08 | 北京金风科创风电设备有限公司 | Generator rotor magnetic pole simulation testing device |
| CN108132192B (en) * | 2017-12-29 | 2020-05-12 | 北京金风科创风电设备有限公司 | Generator rotor magnetic pole simulation testing device |
| CN109342946A (en) * | 2018-11-30 | 2019-02-15 | 冶金自动化研究设计院 | A kind of universal open type outer-rotor permanent magnet motor experimental rig |
| CN110596504A (en) * | 2019-10-24 | 2019-12-20 | 中铁十局集团电务工程有限公司 | Indoor simulation test device for hump signal speed reducer |
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