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INVENTION
Russian Federation Patent RU2176030
Windmills (windmill)
Name of the inventor: Golubev VI .; Zubin IA
The name of the patentee: Moscow Power Engineering Institute (Technical University)
Address for correspondence: 111250, Moscow, ul. Krasnokazarmennaya 14, MEI, HNI pat.otdel, T.A.Lobzovoy
Starting date of the patent: 2000.07.25
The invention relates to wind energy and is designed for use as a clean energy source. The technical result consists in reducing the weight and size installation, increasing the automatic stabilization of frequency of rotation of the motor-generator, increasing the use of wind power, is achieved due to the fact that the wind power plant comprising a wind turbine, hydraulic pump, hydraulic motor fluidly battery and motor-generator according to the invention is provided with inverse and proportional valves sequentially disposed between the hydraulic pump and hydraulic motor, pressure line, hydraulic lock, the entrance of which is connected to the pressure line, gidromultiplikatorom consisting of two reversible hydraulic machines with different working volumes and having a low-pressure entrance and exit and high-pressure line, which is connected to pneumohydraulic battery , pressure switch, connected to the latter, a solenoid valve, the output of which is connected to the control input of the hydraulic lock and the input connected to the output hydraulic lock and low-pressure entrance gidromultiplikatora, distributor with two outs and the input connected to the low-pressure outlet of the multiplier, and outputs - parallel to the hydraulic pump, tachometer mounted on a common shaft and the turbine pump, control unit, three inputs of which are connected to respective outputs of the generator motor, a tachometer and a pressure switch, and the three outputs of the control unit are connected respective inputs of the solenoid valve, the proportional valve and the hydraulic motor.
DESCRIPTION OF THE INVENTION
The invention relates to wind energy and is designed for use as a clean energy source.
Known wind power plant (sm. authors. Certificate USSR N 1694067, IPC 5 F 03 D 9/00, publ. BI N 43, 1991), comprising a housing with bladed wind wheel, mounted in its middle section with the help of the hub, the device conversion energy formed as a hydraulic circuit comprising a serially connected collectors, accumulators, hydraulic pump disposed in the housing, and motors, and associated with the latest electric motor-generators. Accumulators and motor-generators are placed in the ground installation.
However, such a setting is not stable in operation when changing the wind speed.
The closest to the technical nature of the proposed invention is a wind power plant, described in RF Patent N 2084697, IPC 6 F 03 D 9/00, publ. Of 20/07/1997, and a wind turbine comprising the energy storage device comprising a hydraulic pump, pneumatic-batteries, motor and generator-motor, electric generator, kinematically connected to the wind turbine, and an electric motor, the hydraulic pump forming with electropump unit. An apparatus for energy storage unit is in the form pneumatichydraulic batteries, gas cavities are connected by a common duct, and a communicating between the hydraulic accumulators pneumatichydraulic cavity through a check valve connected to the hydraulic pump and by means of the locking device, and hydraulic pressure transducer - with the motor.
However, such plants have large weight and overall dimensions, low efficiency associated with double conversion, and low reliability.
An object of the invention is to reduce the weight and size installation, increasing the depth of the automatic frequency control of motor-generator rotation when changing the speed of the wind wheel, caused by the fall of the wind speed up to complete short-term calm, and better utilization of wind energy.
This object is achieved by the well-known wind power plant comprising a wind turbine, hydraulic pump, hydraulic motor fluidly battery and the motor-generator is equipped with a reverse and proportional valves sequentially arranged between the hydraulic pump and hydraulic motor, pressure line, hydraulic locks, whose input is connected to the pressure line, gidromultiplikatorom consisting of two reversible hydraulic machines with different working volumes and having a low-pressure entrance and exit and high-pressure line, which is connected to pneumohydraulic accumulator, pressure switch, connected to the latter, a solenoid valve, the output of which is connected to the control input of the hydraulic lock and the input connected to the output hydraulic lock and low-pressure entrance gidromultiplikatora, distributor with two outs and the input connected to the low-pressure outlet of the multiplier, and outputs - parallel to the hydraulic pump, a tachometer mounted on a common shaft of a wind turbine and hydraulic pump, control unit, three inputs which are connected to corresponding motor-generator output, and tachometer the pressure switch, and the three outputs of the control unit are connected respective inputs of the solenoid valve of the proportional valve and the hydraulic motor.
the invention being illustrated by a drawing, which shows a schematic diagram of a wind power plant.
 | The wind power plant includes a wind turbine 1, kinematically connected to the hydraulic pump 2, pressure line 3 comprising successive return valve 4 and the proportional valve 5, through which the hydraulic pump 2 is connected to a hydraulic motor 6, the output of which through a suction line 7 is connected to the hydraulic pump 2, the output shaft of the hydraulic motor 6 is connected to the motor-generator 8. to discharge line 3 connected to one input of hydraulic lock 9, the output of which is connected to the low-pressure inlet 10 gidromultiplikatora 11 and the input of the electromagnetic valve 12, the output of which is connected to the control input of the hydraulic lock 9. Low-pressure outlet 13 is connected to a 11 gidromultiplikatora input distributor 14, one of the outputs is connected to the suction line 7 and the output of the hydraulic pump 2. High-pressure line 15 gidromultiplikatora 11 is connected to a hydropneumatic accumulator 16 and the pressure switch 17. The tachometer 18 is mounted on a common shaft of a wind turbine 1 and the hydraulic pump 2, and its output, relay outputs pressure 17 and the motor-generator 8 are connected to respective control inputs 19, which unit outputs connected to electrical inputs of the solenoid valve 12, the proportional control valve 5 and 6. The motor mechanism 20 as the control unit 19 may be used a commercially available "Zonal control complex" START-QUEEN "Datasheet RTS-00.0P2799.00.TO". |
Windmills WORKS AS FOLLOWS
If you change the wind speed changes speed wind turbine 1 and driven them into the rotation of the hydraulic pump 2 and recorded a tachometer 18. The control unit 19 compares the signals tachometer 18, the motor-generator 8 and the pressure switch 17. The result of the comparison is to choose one of the following modes of operation ( battery charging and discharging operation mode).
In the rarefied Pneumohydraulic battery and the wind speed increases, the growth speed of a wind turbine 1, the hydraulic pump 2 and the flow rate is increased in the discharge line 3. This increases the pressure in front of the proportional valve 5, as a result of the working fluid through a pilot controlled check valve 9 enters the low pressure inlet 10 gidromultiplikatora 11, a low-pressure outlet 13 gidromultiplikatora 11 returns the working fluid in the suction line 7 through valve 14. Gidromultiplikator 11 provides increased pressure in the high pressure line 15 due to various hydraulic working volumes, which allows to reduce the dimensions of fluid battery 16 without losing its energy consumption. To reduce the charging time of fluid accumulator 16, but also to reduce the threshold value of the wind speed at which can be charged, 20 of the hydraulic motor 6 control mechanism is set to a position of minimum supply and regulation of the motor-generator 8, the speed changing wind velocity provided by changing the working flow fluid passing through the proportional valve 5. When the limit recharging of fluid pressure 16 from pressure switch 17 a signal to the control unit 19, on which the proportional valve 5 moves to the open state, and further control the motor-generator 8, speed control mechanism 20 is provided in accordance with the signals from the tachometer 18 and the motor-generator 8.
wind speed reduction reduces the rotational speed of the hydraulic pump 2 and a reduction of working fluid flow fed into the pressure line 3. Reducing the speed of the hydraulic pump 2 is fixed tachometer 18 and one of the outputs from the control unit 19 receives a signal to switch the solenoid valve 12. As a result, pilot controlled check valve 9 is in the open state. Thus the working fluid from the hydropneumatic accumulator 16 starts to enter the high-pressure line 15 gidromultiplikatora 11, which provides a change of the working fluid flow direction with a low-pressure output 13, low-pressure inlet 10 gidromultiplikatora 11 and through the open pilot controlled check valve 9 into the pressure line 3, which in turn provides additional expense fluid to the hydraulic motor 6 and the frequency stabilization of a motor-generator rotation 8. in this way excludes additional stabilization and energy conversion losses associated with them. The check valve 4 provides an unambiguous direction of working fluid flow.
The inclusion of the rail 14 allows for initial promotion of a wind turbine 1 of the hydraulic pump 2 operating in motor mode, due to the stored energy in hydropneumatic accumulator 16 without translation motor-generator 8 in the electric mode. In this case, it saves energy and increases reliability of the motor-generator by reducing the number of its reverses, and the reliability of the entire power system, which feeds the wind power plant, by reducing interruptions in power supply.
CLAIM
The wind power plant comprising a wind turbine, hydraulic pump, hydraulic motor fluidly battery and the motor-generator, characterized in that it is provided with a check and proportional valves sequentially disposed between the hydraulic pump and hydraulic motor, pressure line, hydraulic locks, whose input is connected to the pressure line, gidromultiplikatorom consisting two reversible hydraulic machines with different working volumes and having a low-pressure entrance and exit and high-pressure line, which is connected to pneumohydraulic accumulator, pressure switch, connected to the latter, a solenoid valve, the output of which is connected to the control input of the hydraulic lock and the input connected to the output hydraulic lock and low-pressure entrance gidromultiplikatora, distributor with two outs and the input connected to the low-pressure outlet of the multiplier, and outputs - parallel to the hydraulic pump, a tachometer mounted on a common shaft of a wind turbine and hydraulic pump, control unit, three inputs of which are connected with the corresponding outputs of the motor-generator, tachometer and pressure switches and the three outputs of the control unit are connected respective inputs of the solenoid valve, the proportional valve and the hydraulic motor.
print version
Publication date 31.01.2007gg
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