CN102628426B - Hydraulic driving-based wind turbine and control method thereof - Google Patents
Hydraulic driving-based wind turbine and control method thereof Download PDFInfo
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a hydraulic driving-based wind turbine and control method thereof. The control method of the wind turbine comprises the following steps of: realizing the transmission from an impeller to a generator by adopting a hydraulic driving mode; before synchronization, controlling the adjustment of the displacement of a variable hydraulic motor by a controller through detecting the rotating speed of a permanent magnet synchronous generator to realize the constant frequency control of the permanent magnet synchronous generator and enabling the output frequency of the permanent magnet synchronous generator to meet the synchronization requirement; and after synchronization, controlling the adjustment of the displacement of the variable hydraulic motor by the controller through detecting the rotating speed and the output power of the impeller to realize the variable speed control of the impeller and enabling the impeller to capture maximum wind energy. According to the hydraulic driving-based wind turbine disclosed by the invention, the stepless speed change can be realized by adopting the hydraulic driving mode; an energy accumulator can absorb energy fluctuation caused by transient wind speed, so that rigid impact on the wind turbine due to the fluctuation of wind speed can be avoided to a certain degree. On the basis of realizing the constant frequency control, the utilization rate of energy can be increased and the cost is saved.
Description
Technical field
The invention belongs to wind power generation field, be specifically related to a kind of based on hydraulicdriven wind energy conversion system and controlling method thereof.
Background technique
Wind energy conversion system is capturing wind energy the device that is converted into electric energy.Because wind energy is the energy that a kind of transient change is very large, when wind energy conversion system is connected to the grid, the frequency of the electricity that requires wind energy conversion system to send is consistent with the frequency of electrical network.For the contradiction between the transient change that solves wind energy and constant mains frequency, a kind of method of extensive use at present is that the wind energy conversion system variable speed constant frequency is controlled.Variable speed constant frequency refers in the wind energy conversion system running, controls the rotating speed of generator and catches maximal wind-energy with the wind speed variation, by other control modes output constant frequency electric energy.
At present, existing wind energy conversion system usually adopts the gearbox drive mode or directly drives the kind of drive.The gearbox drive mode is that impeller is rotation under the blowing of wind, because wheel speed is usually lower, need, through the gear-box speedup, by gear-box, transfer energy to generator end.Directly driving the kind of drive is, impeller directly is connected with the low-speed permanent-magnet synchronous generator.
Adopt the wind energy conversion system of gearbox drive mode, usually adopt double-fed asynchronous generator, amplitude, frequency, the phase sequence of the field current by regulating double-fed asynchronous generator, guarantee the electromotive power output constant frequency and constant voltage.Adopt the vector control technique simultaneously, regulate wheel speed by regulating double-fed asynchronous generator active power, and then realize the Tracing Control of maximal wind-energy capture.The shortcoming of this controlling method is the increase that the buffeting that occurs in speed Control can cause mechanical stress, because the fluctuation of wind speed is larger, gear-box can be subject to larger impact, cause gearbox fault, the maintenance cost generally occurred due to gearbox fault has just accounted for more than 60% of wind energy conversion system maintenance cost.
Adopt the wind energy conversion system that directly drives the kind of drive, usually adopt the low-speed permanent-magnet synchronous generator.It between the rotating speed of low-speed permanent-magnet synchronous generator and mains frequency, is the rigidity coupling, the energy that the wind speed that constantly fluctuation changes will change to the input of low-speed permanent-magnet synchronous generator, this not only brings high load and impact force to wind energy conversion system, and can not move with optimal way.Can solve the coupled problem between rotating speed and mains frequency at proportion transducer between low-speed permanent-magnet synchronous generator and electrical network, but power electronic devices is usually comparatively complicated, and cost costliness, due between low-speed permanent-magnet synchronous generator and electrical network by having adopted intermediate equipment, also can cause the transmission loss of energy.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of based on hydraulicdriven wind energy conversion system and controlling method thereof, the present invention adopts hydraulic transmission mode to realize the transmission of energy, and adopt variable hydraulic motor displacement control technology to realize the control of the grid-connected front and back of wind energy conversion system, reach the purpose of variable speed constant frequency.
For solving the problems of the technologies described above, wind power machine control method of the present invention, its particular content is as described below:
1) wind energy conversion system is by the impeller capturing wind energy, impeller is converted to wind energy mechanical energy and energy is passed to quantitative hydraulic pump, described quantitative hydraulic pump is converted to hydraulic energy output by the mechanical energy of input, the hydraulic energy of described quantitative hydraulic pump output passes to variable hydraulic motor by pipeline, cushions the hydraulic energy of described quantitative hydraulic pump output by accumulator.Described variable hydraulic motor is converted to mechanical energy output by the hydraulic energy of input, and described variable hydraulic motor drives magneto alternator and rotates the output electric energy, and the output terminal of described magneto alternator is directly connected to electrical network.
2) in the rotating shaft of impeller, torque rotational speed meter is set, in rotating shaft place of described magneto alternator, the first speed probe is set, controller is electrically connected with the displacement control end of torque rotational speed meter, the first speed probe, variable hydraulic motor respectively.
3) after wind energy conversion system starts, before being connected to the grid, the actual speed value ω of the magneto alternator that the first speed probe is recorded
gthe input control device.Described controller is by actual speed value ω
gwith predefined rated speed value ω
rcompare, draw rotating speed deviate ω
e, described controller is according to rotating speed deviate ω
ethe constant frequency displacement control signal Q calculated by pid algorithm
m.Described controller output constant frequency displacement control signal Q
mgive the displacement control end of variable hydraulic motor, by the discharge capacity of Moderator Variable oil hydraulic motor, carry out the rotating speed of Moderator Variable oil hydraulic motor, the rotating speed of described variable hydraulic motor equals the rotating speed of magneto alternator, makes the actual speed value ω of magneto alternator
gequal rated speed value ω
r.When wind energy conversion system meets grid-connected the requirement, described controller starts grid-connected program, and wind energy conversion system is connected to the grid.
4), after wind energy conversion system is connected to the grid, the frequency of the electric energy of described magneto alternator output equals mains frequency, the actual speed value ω of described magneto alternator
gequal rated speed value ω
r.When wind energy conversion system is operated in the lower time of a certain wind speed lower than the rated wind speed of wind energy conversion system, the tachometer value ω of the described impeller that torque rotational speed meter is recorded
wwith output power value P
wdifference input control device.Described controller is according to the tachometer value ω of impeller
wcalculate maximum power value P
m, described controller is by maximum power value P
mwith output power value P
wthe power offset value P that compares and draw
e, described controller is according to power offset value P
ecalculate speed change displacement control signal Q by pid algorithm
b.Described controller output variable speed displacement control signal Q
bgive the displacement control end of variable hydraulic motor, discharge capacity by the Moderator Variable oil hydraulic motor, the pressure of fluid in the pipeline that comes the adjustment quantitative oil hydraulic pump to be connected with variable hydraulic motor, realize making impeller catch maximal wind-energy to the adjusting of the rotating speed of quantitative hydraulic pump.
Adopt above-mentioned wind power machine control method based on hydraulicdriven wind energy conversion system, its technological scheme is as described below:
Impeller is connected with quantitative hydraulic pump by torque rotational speed meter, described quantitative hydraulic delivery side of pump is by the import of pipeline link variable oil hydraulic motor, the outlet of described variable hydraulic motor connects the import of quantitative hydraulic pump by pipeline, be connected with accumulator on the pipeline be connected with the import of variable hydraulic motor at described quantitative hydraulic delivery side of pump, described variable hydraulic motor is connected with magneto alternator, and the output terminal of described magneto alternator is connected with electrical network.
Rotating shaft place of described magneto alternator is provided with the first speed probe, and controller is electrically connected with the displacement control end of torque rotational speed meter, the first speed probe, variable hydraulic motor respectively.
Further, described wind energy conversion system also comprises flushing valve and recharging oil device, and the A mouth of described flushing valve connects the quantitative hydraulic delivery side of pump, and the B mouth of described flushing valve is connected with the import of quantitative hydraulic pump.Recharging oil device comprises motor, repairing oil hydraulic pump, the first one-way valve, the second one-way valve, the second relief valve, oil purifier and fuel tank.
Described motor connects the repairing oil hydraulic pump, and described repairing hydraulic pressure delivery side of pump connects the import of the first one-way valve by pipeline, and the import of described repairing oil hydraulic pump connects fuel tank.The outlet of described the first one-way valve connects the C mouth of flushing valve, and the import of described the second relief valve connects the outlet of the first one-way valve, and the outlet of described the second relief valve connects fuel tank.The import of described the second one-way valve connects the import of oil purifier, and the outlet of described the second one-way valve is connected with fuel tank.The import of described oil purifier is connected with the D mouth of flushing valve, and the outlet of described oil purifier is connected with fuel tank.
Further, described flushing valve comprises the 3rd throttle valve, three-position three-way valve and the first relief valve.The E mouth of described three-position three-way valve is communicated with the A mouth of flushing valve, the F mouth of described three-position three-way valve is communicated with the B mouth of flushing valve, the G mouth of described three-position three-way valve is communicated with the C mouth of flushing valve, the outlet of described the first relief valve is communicated with the D mouth of flushing valve, and the G mouth of described three-position three-way valve is connected with the import of the first relief valve by the 3rd throttle valve.The upper control oil circuit of described three-position three-way valve is provided with the first throttle valve, and the next oil circuit control of described three-position three-way valve is provided with the second throttle valve.
Further, the outlet port of described quantitative hydraulic pump is provided with back pressure valve, and described quantitative hydraulic delivery side of pump is connected with the import of back pressure valve, and the import of described quantitative hydraulic pump is connected with the outlet of back pressure valve.
Further, described accumulator connects by stop valve the pipeline that described quantitative hydraulic delivery side of pump is connected with the import of variable hydraulic motor.
Adopt the present invention to there is following beneficial effect:
1, the present invention adopts hydraulic transmission mode to realize that energy is from catching the transmission of end to the generating end, characteristic according to hydraulic system, accumulator can absorb the energy hunting caused by the wind speed transition, makes wind energy conversion system can avoid to a certain extent the rigid impulse brought due to fluctuations in wind speed.
2, the present invention can realize wind energy conversion system variable speed constant frequency control purpose, has improved capacity usage ratio, and can meet wind energy conversion system requirement to generator frequency when grid-connected.
3, the present invention can save gear-box and power electronic equipment, has saved cost, and hydraulic transmission mode can play infinite variable speed effect.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
The control principle drawing that Fig. 1 is embodiment of the present invention wind power machine control method;
Fig. 2 is the rotational speed omega of the embodiment of the present invention based on hydraulicdriven wind energy conversion system-power P plotted curve;
Fig. 3 is the fundamental diagram of the embodiment of the present invention based on hydraulicdriven wind energy conversion system;
The fundamental diagram that Fig. 4 is the flushing valve of the embodiment of the present invention based on hydraulicdriven wind energy conversion system.
Embodiment
With reference to accompanying drawing 1 and accompanying drawing 2.The invention discloses a kind of wind power machine control method, particular content is as described below:
1) wind energy conversion system is by the impeller capturing wind energy, impeller is converted to wind energy mechanical energy and energy is passed to quantitative hydraulic pump, described quantitative hydraulic pump is converted to hydraulic energy output by the mechanical energy of input, the hydraulic energy of described quantitative hydraulic pump output passes to variable hydraulic motor by pipeline, cushions the hydraulic energy of described quantitative hydraulic pump output by accumulator.Described variable hydraulic motor is converted to mechanical energy output by the hydraulic energy of input, and described variable hydraulic motor drives magneto alternator and rotates the output electric energy, and the output terminal of described magneto alternator is directly connected to electrical network.
2) in the rotating shaft of impeller, torque rotational speed meter is set, rotating shaft place at described magneto alternator arranges the first speed probe, described torque rotational speed meter is for measuring rotating speed and the output power of impeller, and described the first speed probe is for measuring the rotating speed of magneto alternator.Controller is electrically connected with the displacement control end of torque rotational speed meter, the first speed probe, variable hydraulic motor respectively.
3) after wind energy conversion system starts, before being connected to the grid, the actual speed value ω of the magneto alternator that the first speed probe is recorded
gthe input control device.Described controller is by actual speed value ω
gwith predefined rated speed value ω
rcompare, draw rotating speed deviate ω
e, described controller is according to rotating speed deviate ω
ethe constant frequency displacement control signal Q calculated by pid algorithm
m.Described controller output constant frequency displacement control signal Q
mgive the displacement control end of variable hydraulic motor, by the discharge capacity of Moderator Variable oil hydraulic motor, carry out the rotating speed of Moderator Variable oil hydraulic motor, the rotating speed of described variable hydraulic motor equals the rotating speed of magneto alternator, makes the actual speed value ω of magneto alternator
gequal rated speed value ω
r.Now, wind energy conversion system is realized constant frequency control, meets grid-connected requirement, and described controller starts grid-connected program, and wind energy conversion system is connected to the grid.
4) Figure 2 shows that rotational speed omega-power P plotted curve.When wind speed during lower than the rated wind speed of wind energy conversion system, the impeller output power is at each wind speed (four wind speed v as shown in Figure 2
1, v
2, v
3, v
4, v wherein
1>v
2>v
3>v
4) a lower corresponding maximum power point (as shown in Figure 2), connect each maximum power point and just can obtain a peak output curve.Known by the peak output curve, by regulating wheel speed, make wind energy conversion system operate on the peak output curve, just can make wind energy conversion system catch maximal wind-energy under different wind speed.Rotating speed for the adjusting of the fluctuation along with wind speed impeller, need to change the countertorque in the quantitative hydraulic pump rotating shaft, discharge capacity by the Moderator Variable oil hydraulic motor, pressure that can adjustment quantitative oil hydraulic pump outlet port, thereby the countertorque on can the rotating shaft of indirect regulation oil hydraulic pump, realize the adjusting of wheel speed.According to above-mentioned control theory, draw following control mode:
After wind energy conversion system is connected to the grid, the frequency of the electric energy of described magneto alternator output equals mains frequency, the actual speed value ω of described magneto alternator
gequal rated speed value ω
r.When wind energy conversion system is operated in the lower time of a certain wind speed lower than the rated wind speed of wind energy conversion system, the tachometer value ω of the described impeller that torque rotational speed meter is recorded
wwith output power value P
wdifference input control device.Described controller is according to the tachometer value ω of impeller
w, inquire about predefined peak output curve, calculate and tachometer value ω
wcorresponding maximum power value P
m, described controller is by maximum power value P
mwith output power value P
wthe power offset value P that compares and draw
e, described controller is according to power offset value P
ecalculate speed change displacement control signal Q by pid algorithm
b.Described controller output variable speed displacement control signal Q
bgive the displacement control end of variable hydraulic motor, discharge capacity by the Moderator Variable oil hydraulic motor, the pressure of fluid in the pipeline that comes the adjustment quantitative oil hydraulic pump to be connected with variable hydraulic motor, realize to the adjusting of the rotating speed of quantitative hydraulic pump is reached the speed Control purpose and makes impeller catch maximal wind-energy.
With reference to accompanying drawing 3 and accompanying drawing 4.Accompanying drawing 3 and accompanying drawing 4 are depicted as and adopt a kind of based on hydraulicdriven wind energy conversion system of above-mentioned wind power machine control method, comprise impeller 11, quantitative hydraulic pump 12, accumulator 31 and variable hydraulic motor 21.Impeller 11 is connected with quantitative hydraulic pump 12 by torque rotational speed meter 13, and described impeller 11 drive quantitative hydraulic pump 12 under the brushing of wind rotates.
The outlet of described quantitative hydraulic pump 12 is by the import of pipeline link variable oil hydraulic motor 21, and the outlet of described variable hydraulic motor 21 connects the import of quantitative hydraulic pump 12 by pipeline.Described quantitative hydraulic pump 12 forms the oil hydraulic circuit of a closure with variable hydraulic motor 21 by pipeline, the oil hydraulic circuit that described quantitative hydraulic pump 12 is closed by this passes to variable hydraulic motor 21 by energy.Described variable hydraulic motor 21 is connected with magneto alternator 51, and described variable hydraulic motor 21 drives magneto alternator 51 and rotates generating output electric energy, and the output terminal of described magneto alternator 51 is connected with electrical network 52.Rotating shaft place of described magneto alternator 51 is provided with the first speed probe 41, and controller 60 is electrically connected with the displacement control end 211 of torque rotational speed meter 13, the first speed probe 41, variable hydraulic motor 21 respectively.
Be connected with stop valve 32 and accumulator 31 on the pipeline be connected with the import of variable hydraulic motor 21 in the outlet of described quantitative hydraulic pump 12, described accumulator 31 is connected with an end of stop valve 32, and the other end of described stop valve 32 is connected with the outlet of quantitative hydraulic pump 12.Described accumulator 31 plays the effect of energy-storing pressure-stabilizing, can cushion the hydraulic energy of quantitative hydraulic pump 12 outputs.The outlet port of described quantitative hydraulic pump 12 is provided with back pressure valve 14, and the outlet of described quantitative hydraulic pump 12 is connected with the import of back pressure valve 14, and the import of described quantitative hydraulic pump 12 is connected with the outlet of back pressure valve 14.
Described wind energy conversion system also comprises flushing valve 70 and recharging oil device 80, and described flushing valve 70 is for the fluid of flushing line, and intermediary's input device of fluid as a supplement.The A mouth of described flushing valve 70 connects the outlet of quantitative hydraulic pump 12, and the B mouth of described flushing valve 70 is connected with the import of quantitative hydraulic pump 12.
Described flushing valve 70 comprises the 3rd throttle valve 73, three-position three-way valve 74 and the first relief valve 75.The E mouth of described three-position three-way valve 74 is communicated with the A mouth of flushing valve 70, the F mouth of described three-position three-way valve 74 is communicated with the B mouth of flushing valve 70, the G mouth of described three-position three-way valve 74 is communicated with the C mouth of flushing valve 70, the outlet of described the first relief valve 75 is communicated with the D mouth of flushing valve 70, and the G mouth of described three-position three-way valve 74 is connected with the import of the first relief valve 75 by the 3rd throttle valve 73; The upper control oil circuit of described three-position three-way valve 74 is provided with first throttle valve 71, and the next oil circuit control of described three-position three-way valve 74 is provided with the second throttle valve 72.
Described recharging oil device 80 comprises motor 81, repairing oil hydraulic pump 82, the first one-way valve 83, the second one-way valve 84, the second relief valve 85, oil purifier 86 and fuel tank 87.Described motor 81 connects repairing oil hydraulic pump 82, and the outlet of described repairing oil hydraulic pump 82 connects the import of the first one-way valve 83 by pipeline, and the import of described repairing oil hydraulic pump 82 connects fuel tank 87.The outlet of described the first one-way valve 83 connects the C mouth of flushing valve 70, and the import of described the second relief valve 85 connects the outlet of the first one-way valve 83, and the outlet of described the second relief valve 85 connects fuel tank 87.The import of described the second one-way valve 84 connects the import of oil purifier 86, and the outlet of described the second one-way valve 84 is connected with fuel tank 87.The import of described oil purifier 86 is connected with the D mouth of flushing valve 70, and the outlet of described oil purifier 86 is connected with fuel tank 87.
According to the structure of above-mentioned flushing valve 70 and recharging oil device 80, the fluid of concrete analysis wind energy conversion system rinses and the repairing process, and detailed process is as follows:
1, fluid flushing process: control three-position three-way valve 74 and be operated in the next, now the E mouth of described three-position three-way valve 74 and G mouth are connected, the fluid flowed out from the outlet of quantitative hydraulic pump 12, the three-position three-way valve 74 of flowing through successively, the 3rd throttle valve 73 and oil purifier 86, flow back to fuel tank 87.In this process, oil purifier 86 plays the effect of washing and filtering fluid.
2, repairing process: starting electrical machinery 81, controlling three-position three-way valve 74 is operated in upper, now the F mouth of described three-position three-way valve 74 and G mouth are connected, motor 81 drives repairing oil hydraulic pump 82 and rotates, repairing oil hydraulic pump 82 oil suction from fuel tank 87, the fluid flowed out from the outlet of repairing oil hydraulic pump 82, flow through successively the first one-way valve 83 and three-position three-way valve 74, flow into the pipeline of quantitative hydraulic pump 12 inlets, complete the repairing process.
Claims (6)
1. a wind power machine control method is characterized in that:
1) wind energy conversion system is by the impeller capturing wind energy, impeller is converted to wind energy mechanical energy and energy is passed to quantitative hydraulic pump, described quantitative hydraulic pump is converted to hydraulic energy output by the mechanical energy of input, the hydraulic energy of described quantitative hydraulic pump output passes to variable hydraulic motor by pipeline, cushions the hydraulic energy of described quantitative hydraulic pump output by accumulator; Described variable hydraulic motor is converted to mechanical energy output by the hydraulic energy of input, and described variable hydraulic motor drives magneto alternator and rotates the output electric energy, and the output terminal of described magneto alternator is directly connected to electrical network;
2) in the rotating shaft of impeller, torque rotational speed meter is set, in rotating shaft place of described magneto alternator, the first speed probe is set, controller is electrically connected with the displacement control end of torque rotational speed meter, the first speed probe, variable hydraulic motor respectively;
3) after wind energy conversion system starts, before being connected to the grid, the actual speed value ω of the magneto alternator that the first speed probe is recorded
gthe input control device; Described controller is by actual speed value ω
gwith predefined rated speed value ω
rcompare, draw rotating speed deviate ω
e, described controller is according to rotating speed deviate ω
ethe constant frequency displacement control signal Q calculated by pid algorithm
m; Described controller output constant frequency displacement control signal Q
mgive the displacement control end of variable hydraulic motor, by the discharge capacity of Moderator Variable oil hydraulic motor, carry out the rotating speed of Moderator Variable oil hydraulic motor, the rotating speed of described variable hydraulic motor equals the rotating speed of magneto alternator, makes the actual speed value ω of magneto alternator
gequal rated speed value ω
r; When wind energy conversion system meets grid-connected the requirement, described controller starts grid-connected program, and wind energy conversion system is connected to the grid;
4), after wind energy conversion system is connected to the grid, the frequency of the electric energy of described magneto alternator output equals mains frequency, the actual speed value ω of described magneto alternator
gequal rated speed value ω
r; When wind energy conversion system is operated in the lower time of a certain wind speed lower than the rated wind speed of wind energy conversion system, the tachometer value ω of the described impeller that torque rotational speed meter is recorded
wwith output power value P
wdifference input control device; Described controller is according to the tachometer value ω of impeller
wcalculate maximum power value P
m, described controller is by maximum power value P
mwith output power value P
wthe power offset value P that compares and draw
e, described controller is according to power offset value P
ecalculate speed change displacement control signal Q by pid algorithm
b; Described controller output variable speed displacement control signal Q
bgive the displacement control end of variable hydraulic motor, discharge capacity by the Moderator Variable oil hydraulic motor, the pressure of fluid in the pipeline that comes the adjustment quantitative oil hydraulic pump to be connected with variable hydraulic motor, realize making impeller catch maximal wind-energy to the adjusting of the rotating speed of quantitative hydraulic pump.
2. adopt wind power machine control method claimed in claim 1 based on hydraulicdriven wind energy conversion system, it is characterized in that: impeller (11) is connected with quantitative hydraulic pump (12) by torque rotational speed meter (13), the outlet of described quantitative hydraulic pump (12) is by the import of pipeline link variable oil hydraulic motor (21), the outlet of described variable hydraulic motor (21) connects the import of quantitative hydraulic pump (12) by pipeline, be connected with accumulator (31) on the pipeline be connected with the import of variable hydraulic motor (21) in the outlet of described quantitative hydraulic pump (12), described variable hydraulic motor (21) is connected with magneto alternator (51), the output terminal of described magneto alternator (51) is connected with electrical network (52),
Rotating shaft place of described magneto alternator (51) is provided with the first speed probe (41), and controller (60) is electrically connected with the displacement control end (211) of torque rotational speed meter (13), the first speed probe (41), variable hydraulic motor (21) respectively.
According to claimed in claim 2 based on hydraulicdriven wind energy conversion system, it is characterized in that: described wind energy conversion system also comprises flushing valve (70) and recharging oil device (80), the A mouth of described flushing valve (70) connects the outlet of quantitative hydraulic pump (12), and the B mouth of described flushing valve (70) is connected with the import of quantitative hydraulic pump (12); Recharging oil device (80) comprises motor (81), repairing oil hydraulic pump (82), the first one-way valve (83), the second one-way valve (84), the second relief valve (85), oil purifier (86) and fuel tank (87);
Described motor (81) connects repairing oil hydraulic pump (82), and the outlet of described repairing oil hydraulic pump (82) connects the import of the first one-way valve (83) by pipeline, and the import of described repairing oil hydraulic pump (82) connects fuel tank (87); The outlet of described the first one-way valve (83) connects the C mouth of flushing valve (70), the import of described the second relief valve (85) connects the outlet of the first one-way valve (83), and the outlet of described the second relief valve (85) connects fuel tank (87); The import of described the second one-way valve (84) connects the import of oil purifier (86), and the outlet of described the second one-way valve (84) is connected with fuel tank (87); The import of described oil purifier (86) is connected with the D mouth of flushing valve (70), and the outlet of described oil purifier (86) is connected with fuel tank (87).
According to claimed in claim 3 based on hydraulicdriven wind energy conversion system, it is characterized in that: described flushing valve (70) comprises the 3rd throttle valve (73), three-position three-way valve (74) and the first relief valve (75); The E mouth of described three-position three-way valve (74) is communicated with the A mouth of flushing valve (70), the F mouth of described three-position three-way valve (74) is communicated with the B mouth of flushing valve (70), the G mouth of described three-position three-way valve (74) is communicated with the C mouth of flushing valve (70), the outlet of described the first relief valve (75) is communicated with the D mouth of flushing valve (70), and the G mouth of described three-position three-way valve (74) is connected with the import of the first relief valve (75) by the 3rd throttle valve (73); The upper control oil circuit of described three-position three-way valve (74) is provided with first throttle valve (71), and the next oil circuit control of described three-position three-way valve (74) is provided with the second throttle valve (72).
5. described based on hydraulicdriven wind energy conversion system according to claim 3 or 4, it is characterized in that: the outlet port of described quantitative hydraulic pump (12) is provided with back pressure valve (14), the outlet of described quantitative hydraulic pump (12) is connected with the import of back pressure valve (14), and the import of described quantitative hydraulic pump (12) is connected with the outlet of back pressure valve (14).
According to claimed in claim 5 based on hydraulicdriven wind energy conversion system, it is characterized in that: described accumulator (31) connects the pipeline that the outlet of described quantitative hydraulic pump (12) is connected with the import of variable hydraulic motor (21) by stop valve (32).
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| CN103114967B (en) * | 2013-02-28 | 2014-09-17 | 浙江大学 | Hydraulic transmission wind-wave-complementary power generation set and control method thereof |
| CN103206334B (en) * | 2013-04-03 | 2015-10-21 | 浙江大学 | A kind of low-speed direct driving hydraulic power generation device from sea current and controlling method thereof |
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