CN206738078U - A kind of hydraulic drive type wind power generating set - Google Patents
A kind of hydraulic drive type wind power generating set Download PDFInfo
- Publication number
- CN206738078U CN206738078U CN201720312010.8U CN201720312010U CN206738078U CN 206738078 U CN206738078 U CN 206738078U CN 201720312010 U CN201720312010 U CN 201720312010U CN 206738078 U CN206738078 U CN 206738078U
- Authority
- CN
- China
- Prior art keywords
- oil
- valve
- way
- pressure
- hydraulic pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000001502 supplementing effect Effects 0.000 claims description 46
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001627 detrimental effect Effects 0.000 abstract 2
- 230000005611 electricity Effects 0.000 abstract 1
- 239000002828 fuel tank Substances 0.000 abstract 1
- 238000004146 energy storage Methods 0.000 description 11
- 238000010248 power generation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Wind Motors (AREA)
Abstract
The utility model belongs to wind-power electricity generation control technology field.In order to solve existing wind power generating set when directly being braked to the transmission axle of wind wheel or the transmission axle of gear-box using brake disc, the problem of damaging in the presence of generation detrimental impact load and then to wind power generating set, the utility model discloses a kind of hydraulic drive type wind power generating set.The wind power generating set, including major circulatory system, ground oil-supplementing system, main fuel tank and wind wheel and generator.In stopping brake, first by the way that major circulatory system is divided into hydraulic pump self-circulation system and variable displacement motor self-circulation system, the hydraulic braking to hydraulic pump and variable displacement motor is realized, mechanical braking is then carried out to the wind wheel of low speed by the brake disc of small size again.The mode of braking to be cooperated by using hydraulic braking and mechanical braking, the stable parking of the wind power generating set is completed, the generation of detrimental impact load is avoided, improves the operation stability and security of wind power generating set.
Description
Technical Field
The utility model belongs to the technical field of wind power generation control, concretely relates to hydraulic drive type wind generating set.
Background
In recent years, the world wind power industry has been developed sufficiently, and plays more and more important roles in relieving energy and environmental crisis. Currently, there are two main types of wind turbine generators in actual operation: a speed-increasing gear box-double-fed generator system and a direct-drive-converter system.
The speed-increasing gear box-double-fed generator system ensures constant frequency and constant voltage of output electric power by adjusting the amplitude, frequency and phase sequence of exciting current of the double-fed generator. Meanwhile, the vector conversion control technology is adopted, and the rotating speed of the wind wheel is adjusted by adjusting the active power of the doubly-fed generator, so that the capture tracking control of the maximum wind energy is realized. However, when the output shaft of the gear box is braked by the brake disk, the rotational speed is high, which may cause mechanical vibration and increase of mechanical stress, thereby causing damage to the gear box.
The direct drive-converter system has no gearbox, the wind wheel is directly connected with the generator, and a low-speed permanent magnet synchronous generator is generally adopted. In this case, a large braking device is required to perform a braking and stopping operation on the wind turbine, for example, by providing a large-sized brake disc in the nacelle. Thus, the size and weight of the nacelle are increased invisibly, equipment lifting and maintenance are not facilitated, and damage to the wind turbine generator system is caused by harmful impact loads generated during braking.
SUMMERY OF THE UTILITY MODEL
In order to solve current wind generating set when adopting the transmission axle of brake disc to the wind wheel or the transmission axle of gear box directly to brake, there is the problem that produces harmful impact load and causes destruction to wind generating set, the utility model provides a hydraulic drive type wind generating set. The wind generating set comprises a main circulating system, a ground oil supplementing system, a main oil tank, a wind wheel and a generator; wherein,
the main circulating system comprises a hydraulic pump, a variable motor, a high-pressure oil way, a low-pressure oil way, a first overflow valve, a second overflow valve, a third overflow valve, a first reversing valve, a second reversing valve, a first stop valve, a first one-way valve and a second one-way valve; the high-pressure oil way is positioned between an oil outlet of the hydraulic pump and an oil inlet of the variable displacement motor; the low-pressure oil way is positioned between an oil outlet of the variable motor and an oil inlet of the hydraulic pump; the first overflow valve is positioned between the high-pressure oil way and the low-pressure oil way; the first stop valve is positioned on the high-pressure oil way and close to the oil inlet end of the variable displacement motor; the first reversing valve is positioned in the high-pressure oil way and is a two-position three-way reversing valve and used for controlling connection between a first oil port and a second oil port or a third oil port, wherein the first oil port is connected with an oil outlet end of the hydraulic pump, the second oil port is connected with an oil inlet end of the variable motor, the third oil port is connected with an oil inlet of the second overflow valve, an oil outlet of the second overflow valve is connected with an oil inlet of the first one-way valve, and an oil outlet of the first one-way valve is connected with the low-pressure oil way; an oil inlet of the third overflow valve is positioned between the second overflow valve and the first one-way valve, and an oil outlet of the third overflow valve is connected with an oil return path; the second reversing valve is positioned in the low-pressure oil way, is a two-position three-way reversing valve and is used for controlling the connection between a first oil port and a second oil port or a third oil port, wherein the first oil port is connected with the oil outlet end of the variable motor, the second oil port is connected with the oil inlet end of the hydraulic pump, and the third oil port is connected with the high-pressure oil way and is positioned between the first stop valve and the oil inlet of the variable motor; an oil inlet of the second one-way valve is connected with the main oil tank, and an oil outlet of the second one-way valve is connected with a third oil port of the second reversing valve; the oil return oil way is connected with the main oil tank;
the ground oil supplementing system comprises an oil supplementing pump, an oil supplementing oil way, a fourth overflow valve and a fifth overflow valve; an oil inlet of the oil replenishing pump is connected with the main oil tank; one end of the oil supplementing oil path is connected with an oil outlet of the oil supplementing pump, and the other end of the oil supplementing oil path is connected with the low-pressure oil path; the fourth overflow valve is positioned between the low-pressure oil way and the oil return oil way; the fifth overflow valve is positioned between the oil supplementing oil way and the oil returning oil way;
the wind wheel is connected with an input shaft of the hydraulic pump;
the generator is connected with an output shaft of the variable displacement motor.
Preferably, the wind generating set further comprises a second stop valve, and the second stop valve is located between the oil supplementing oil way and the oil returning oil way.
Preferably, the wind generating set further comprises a high-altitude oil supplementing system and a pressure sensor, wherein the high-altitude oil supplementing system comprises a high-altitude oil supplementing tank, a first throttling valve and a third stop valve; the first throttle valve and the third stop valve are positioned between the high-altitude oil supplementing tank and an oil inlet of the hydraulic pump, and the third stop valve adopts an electromagnetic stop valve; the pressure sensor is positioned at the oil inlet end of the hydraulic pump and used for detecting the pressure of the oil inlet of the hydraulic pump and assisting in controlling the on-off of the third stop valve.
Preferably, the main circulation system further comprises a second check valve, a fourth stop valve and a sixth overflow valve; the second check valve is positioned at the oil inlet end of the hydraulic pump; the fourth stop valve is positioned on the high-pressure oil path and is close to an oil outlet end of the hydraulic pump; the sixth overflow valve is located between the high-pressure oil way and the low-pressure oil way, an oil inlet of the sixth overflow valve is located between an oil outlet of the hydraulic pump and the fourth stop valve, and an oil outlet of the sixth overflow valve is located between the oil inlet of the hydraulic pump and the second one-way valve.
Preferably, the main circulation system further comprises a pressure stabilizing accumulator, and the pressure stabilizing accumulator is located in the high-pressure oil way and is close to the oil inlet end of the first overflow valve.
Further preferably, the main circulation system further comprises a speed regulating valve, and the speed regulating valve is located at an oil inlet of the variable displacement motor.
Compared with the existing wind generating set, the utility model discloses a hydraulic drive type wind generating set has following beneficial effect:
the utility model discloses a hydraulic drive type wind generating set is through setting up a plurality of switching-over valves, stop valve and overflow valve in main circulation system to when carrying out wind generating set's parking, at first through two switching-over valves, a stop valve and a check valve, divide into two systems with the main circulation system that hydraulic pump and variable displacement motor constitute: a hydraulic pump self-circulation system and a variable motor self-circulation system. In the self-circulation system of the hydraulic pump, firstly, the set pressure of an overflow valve in an oil way is adjusted to improve the load pressure, so that the rotating speed of the hydraulic pump is gradually reduced, and further, the rotating speed of a wind wheel is reduced and kept stable; the transmission shaft between the wind wheel and the hydraulic pump is then mechanically braked by means of a brake disc. Before mechanical braking, the rotating speed of the wind wheel is reduced to a low-speed stable state or even zero through the hydraulic pump self-circulation system, so that the acting force between the brake disc and the transmission shaft is greatly reduced and the variation amplitude of the acting force is also reduced when mechanical braking is performed again, thereby reducing mechanical vibration and mechanical stress and improving the operation stability and safety of the generator set.
Drawings
FIG. 1 is a schematic diagram of the overall system of the hydraulic transmission type wind generating set of the present invention;
FIG. 2 is a schematic diagram of a system for operating a wind turbine generator system when there is a demand for power generation and the wind speed is between the cut-in wind speed and the cut-out wind speed;
FIG. 3 is a schematic diagram of a system for operating a wind turbine generator system when there is a demand for power generation but the wind speed is less than the cut-in wind speed or greater than the cut-out wind speed;
FIG. 4 is a schematic diagram of a system for operating a wind turbine generator set according to the present invention when there is no power generation demand but the wind speed is between the cut-in wind speed and the cut-out wind speed;
FIG. 5 is a schematic diagram of a system for operating the wind turbine generator set according to the present invention when the wind turbine generator set is normally parked;
fig. 6 is a schematic diagram of a system for operating a wind generating set when the wind generating set needs to stop in an emergency.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the hydraulic transmission type wind generating set includes a main circulation system 1, a ground oil supply system 2, a main oil tank 3, a wind wheel 4 and a generator 5.
The main circulation system 1 is a closed hydraulic system, and includes a hydraulic pump 101, a variable displacement motor 102, a high-pressure oil passage 103, a low-pressure oil passage 104, a first relief valve 105, a second relief valve 106, a third relief valve 107, a first check valve 108, a second check valve 109, a first direction switching valve 110, a second direction switching valve 111, and a first shutoff valve 112. The high-pressure oil path 103 is located between an oil outlet of the hydraulic pump 101 and an oil inlet of the variable motor 102, and the low-pressure oil path 104 is located between an oil outlet of the variable motor 102 and an oil inlet of the hydraulic pump 101. The first relief valve 105 is located between the high-pressure oil passage 103 and the low-pressure oil passage 104, and the first shutoff valve 112 is located in the high-pressure oil passage 103 near the oil inlet end of the variable displacement motor 102. The first directional valve 110 is located in the high-pressure oil path 103, is a two-position three-way directional valve, and is configured to control connection between the first oil port and the second oil port or between the first oil port and the third oil port, where the first oil port is connected to the oil outlet end of the hydraulic pump 101, the second oil port is connected to the oil inlet end of the variable motor 102, the third oil port is connected to the oil inlet of the second overflow valve 106, the oil outlet of the second overflow valve 106 is connected to the oil inlet of the first check valve 108, and the oil outlet of the first check valve 108 is connected to the low-pressure oil path 104. An oil inlet of the third overflow valve 107 is located between the second overflow valve 106 and the first check valve 108, and an oil outlet is connected to the oil return path 301. The second directional valve 111 is located in the low-pressure oil path 104 and is a two-position three-way directional valve, and is configured to control connection between the first oil port and the second oil port or between the first oil port and the third oil port, where the first oil port is connected to the oil outlet of the variable displacement motor 102, the second oil port is connected to the oil inlet of the hydraulic pump 101, and the third oil port is connected to the high-pressure oil path 103 and is located between the first stop valve 112 and the oil inlet of the variable displacement motor 102. An oil inlet of the second check valve 109 is connected with the main oil tank 3, and an oil outlet of the second check valve is connected with a third oil port of the second reversing valve 111. The oil return passage 301 is connected to the main oil tank 3.
Preferably, a pressure flow sensor 61 is respectively disposed at an oil outlet end of the hydraulic pump 101 and an oil outlet end of the variable displacement motor 102, and is respectively used for detecting pressure and flow of oil in the high-pressure oil line 103 and the low-pressure oil line 104, and converting the pressure and flow into current signals to transmit to the control system, so as to realize remote monitoring of the main circulation system 1.
The ground oil supply system 2 includes an oil supply pump 201, an oil supply path 202, a fourth relief valve 203, and a fifth relief valve 204. Wherein, the oil inlet and the main tank 3 of oil supplementing pump 201 are connected, and the oil-out is equipped with the filter for improve the cleanliness of input primary circulation system 1 interior fluid to and be equipped with the check valve, be used for preventing that the hydraulic shock in the primary circulation system 1 from causing the impact damage to oil supplementing pump 201. One end of the oil supplementing oil path 202 is connected with an oil outlet of the oil supplementing pump 201, and the other end is connected with the low-pressure oil path 104. The fourth spill valve 203 is located between the low pressure oil passage 104 and the return oil passage 301. Fifth relief valve 204 is located between oil replenishment passage 202 and oil replenishment passage 301. The oil return passage 301 is connected to the main oil tank 3. Preferably, the oil replenishing pump 201 adopts a variable pump structure, so that when the inlet pressure of the hydraulic pump 101 is unstable, the discharge capacity of the oil replenishing pump 201 can be properly increased to improve the oil flow rate of the input low-pressure oil path 104, thereby avoiding the occurrence of the suction phenomenon of the hydraulic pump 101.
The wind wheel 4 is connected with the input shaft of the hydraulic pump 101, and the generator 5 is connected with the output shaft of the variable displacement motor 102. A speed sensor 62 is arranged at the end face of the wind rotor 4 for detecting the rotation speed of the wind rotor 4. A rotational speed sensor 63 for detecting the rotational speed of the drive shaft is provided at the input shaft of the hydraulic pump 101 and the output shaft of the variable displacement motor 102. In this way, the operation conditions of the wind wheel 4 and the generator 5 can be remotely monitored in real time and problems can be found in time. Furthermore, in the present invention, the generator 5 is an excitation synchronous generator.
Preferably, the wind generating set further comprises a second stop valve 7, the second stop valve 7 is located between the oil supplementing oil path 202 and the oil returning oil path 301, when the second stop valve 7 is in a communication state, the oil supplementing oil path 202 and the low pressure oil path 104 are directly communicated with the main oil tank 3, so that oil in the oil supplementing oil path 202 and part of the oil in the low pressure oil path 104 can be quickly drained.
Preferably, the wind generating set further comprises a high altitude oil supplementing system 8 and a pressure sensor 64. The high altitude oil compensation system 8 includes a high altitude oil compensation tank 801, a first throttle valve 802, and a third cut-off valve 803. The first throttle valve 802 and the third stop valve 803 are connected in series and located between the high altitude oil supplementing tank 801 and the oil inlet of the hydraulic pump 101, and the third stop valve 803 is an electromagnetic stop valve. The pressure sensor 64 is located at an oil inlet end of the hydraulic pump 101, and is used for detecting the pressure of the oil inlet of the hydraulic pump 101. In this way, when the pressure sensor 64 detects that the pressure at the oil inlet of the hydraulic pump 101 is lower than the minimum oil inlet pressure of the hydraulic pump 101, a control signal is sent out to switch the third stop valve 803 to the connected state, and the oil in the high-altitude oil supplementing tank 801 flows into the low-pressure oil path 104 through the first throttle valve 802 and the third stop valve 803 under the action of the atmospheric pressure, so as to supplement the oil at the oil inlet of the hydraulic pump 101 in time. Further, by adjusting the opening amount of the first throttle valve 802, the oil replenishment speed can be controlled. Additionally, the utility model discloses in, this high altitude oil supplementing system 8 is located the cabin of pylon top with hydraulic pump 101 simultaneously, can improve the promptness and the rapidity of supplementing fluid to hydraulic pump 101 like this, reduces the on-the-way loss of oil supplementing process simultaneously, guarantees the pressure stability of supplementing fluid.
Preferably, the main circulation system 1 further includes a third check valve 113, a sixth relief valve 114, and a fourth shutoff valve 115. Wherein the third check valve 113 is located at an oil inlet end of the hydraulic pump 101. The fourth shutoff valve 115 is located on the high-pressure oil passage 103 and near the oil outlet end of the hydraulic pump 101. The sixth relief valve 114 is located between the high-pressure oil passage 103 and the low-pressure oil passage 104, and an oil inlet of the sixth relief valve 114 is located between an oil outlet of the hydraulic pump 101 and the fourth cut-off valve 115, and an oil outlet is located between an oil inlet of the hydraulic pump 101 and the third check valve 113.
Preferably, the main circulation system 1 further comprises a fourth check valve 116 and is located on the low-pressure oil path 104 between the oil outlet of the variable displacement motor 102 and the oil supplementing path 202, for preventing the supplementing oil output by the oil supplementing pump 201 from directly flowing to the hydraulic motor 102 after entering the low-pressure oil path 104, thereby preventing the normal operation of the hydraulic motor 102 from being affected.
Preferably, the main circulation system 1 further comprises a pressure-stabilizing accumulator 117. A pressure-stabilizing accumulator 117 is located in the high-pressure oil passage 103 and near the oil inlet end of the first relief valve 105. Thus, when the output oil of the hydraulic pump 101 has flow pulsation and hydraulic impact due to the unstable rotating speed of the wind wheel 4, the flow pulsation and the hydraulic impact can be absorbed and stabilized rapidly in time through the pressure stabilizing energy accumulator 117, so that the oil flowing to the variable displacement motor 102 is kept stable, the output rotating speed of the variable displacement motor 102 is stabilized, and the power fluctuation of the generator 5 is reduced.
Preferably, the primary circulation system 1 further includes a speed control valve 118 and is located at the oil inlet of the variable displacement motor 102. The flow entering the variable displacement motor 102 is controlled through the speed regulating valve 118, and the swing angle of the variable displacement motor 102 is adjusted, so that the actual output rotating speed of the variable displacement motor 102 is controlled. Firstly, setting the self swing angle of the variable motor 102, and determining the output rotating speed range of the variable motor 102; then, the opening amount of the speed regulating valve 118 is regulated, and the actual flow entering the variable motor 102 is controlled, so that the final output rotating speed of the variable motor 102 is controlled, the rotating speed of the generator 5 is controlled and tends to the power frequency rotating speed, the generator 5 can be directly connected to the grid for power generation, and a converter and a complex control circuit are omitted.
Preferably, the wind generating set further comprises an energy storage system 9 and a fifth one-way valve 119. The fifth check valve 119 is located on the high-pressure oil passage 103. The energy storage system 9 comprises a parallel energy storage group 901, an energy storage oil path 902, a second throttling valve 903 and a fifth stop valve 904. The parallel accumulator group 901 is formed by connecting a plurality of independent accumulators in parallel, and a stop valve is arranged at the oil port position of each accumulator, so that the single accumulator can be conveniently dismounted and overhauled without influencing the normal operation of the parallel accumulator group 901. One end of the energy storage oil path 902 is connected to an oil port of the parallel accumulator set 901, and the other end is connected to the high-pressure oil path 103 and is located between the fifth check valve 119 and the first stop valve 112, so that the oil output from the parallel accumulator set 901 can only flow to the variable displacement motor 102 through the first stop valve 112 after entering the high-pressure oil path 103. The second throttle 903 and the fifth cut-off valve 904 are connected in parallel and are located on the charge oil passage 902 at the same time.
When high-pressure oil is stored in the parallel accumulator group 901, that is, when the high-pressure oil enters the energy storage system 9 from the high-pressure oil line 103, the fifth stop valve 904 is in a communicating state, so that the high-pressure oil can quickly enter the energy accumulator through the fifth stop valve 904, and the high-pressure oil is stored quickly and with low loss. When the high-pressure oil in the parallel accumulator group 901 is released, that is, the high-pressure oil enters the high-pressure oil passage 103 from the energy storage system 9, the fifth stop valve 904 is in a closed state and opens the second throttle valve 903, so that the stored high-pressure oil enters the high-pressure oil passage 103 through the second throttle valve 903, and thus, by adjusting the opening amount of the second throttle valve 903, the release speed of the high-pressure oil can be controlled and stabilized, and the flow fluctuation and hydraulic impact generated in the release process of the high-pressure oil are reduced.
In addition, pressure and flow sensors 61 are respectively arranged at the oil port position of the parallel accumulator group 901 and the oil port end of the second throttle 903 close to the high-pressure oil path 103, and are respectively used for acquiring and detecting the oil pressure and flow entering the parallel accumulator group 901 and the oil pressure and flow entering the high-pressure oil path 103 through the second throttle 903, and the acquired oil pressure and flow are used as reference values for adjusting the swing angle of the variable motor 102. In addition, a safety valve 905 is further disposed at the oil port of the parallel accumulator set 901 for limiting the highest pressure of the oil stored in the parallel accumulator set 901.
The utility model discloses in, first stop valve 112, second stop valve 7, third stop valve 803 and fourth stop 115 and fifth stop valve 904 all adopt the electromagnetism stop valve structure, and first overflow valve 105, second overflow valve 106 and sixth overflow valve 114 all adopt the proportion overflow valve structure. Therefore, remote control over the hydraulic elements can be realized through remote current control signals, so that the wind generating set can be controlled quickly and accurately and controlled automatically. Wherein, to 600 KW's wind generating set, the utility model provides a first overflow valve 105's the highest set pressure is 30MPa for inject the highest pressure of fluid in the high-pressure oil circuit 103, protect main circulation system 1's operation safety. The third overflow valve 107 and the fourth overflow valve 203 are respectively set to be 1.5MPa and are used for guiding high-temperature oil in the system into the main oil tank 3 and reducing the temperature of the oil in the system. The fifth relief valve 204 is set to 2MPa, and is used for limiting the oil pressure output by the oil charge pump 201. The maximum pressure set by the second relief valve 106 and the sixth relief valve 114 is 30MPa, and the pressure set value is gradually increased by adjustment when the relief valve is used as a load, so that the pressure load of the corresponding oil passage is adjusted.
The utility model discloses hydraulic drive type wind generating set's control method as follows:
when there is a power generation demand and the wind speed is between the cut-in wind speed and the cut-out wind speed. The wind speed condition meets the normal operation of the wind generating set, and the ground oil supplementing system 3 assists the main circulating system 1 to work.
As shown in fig. 1 and 2, the second and fifth cut-off valves 7 and 904 are in the off state, the first and fourth cut-off valves 112 and 115 are in the connected state, the first and second oil ports of the first and second direction valves 110 and 111 are connected, the third oil port is closed, and the oil replenishment pump 201 is in the operating state. Thus, a complete closed hydraulic system is formed between the high-pressure oil passage 103 and the low-pressure oil passage 104. At this time, the hydraulic pump 101 outputs high-pressure oil under the driving of the wind wheel 4, the high-pressure oil flows to the variable displacement motor 102 through the high-pressure oil path 103, and during the period, the high-pressure oil sequentially passes through the fourth stop valve 115, the first reversing valve 110, the fifth one-way valve 119, the first stop valve 112 and the speed regulating valve 118, so that the variable displacement motor 102 is driven to rotate, and the generator 5 is driven to rotate to generate electric energy. The oil outlet of the variable displacement motor 102 outputs low-pressure oil, after the low-pressure oil passes through the second reversing valve 111, one part of the low-pressure oil passes through the fourth check valve 116 and the third check valve 113 and then flows to the oil inlet of the hydraulic pump 101, and the other part of the low-pressure oil passes through the fourth overflow valve 203 and flows to the main oil tank 3. The oil supply pump 201 sucks oil from the main tank 3 and supplies the oil to the low-pressure oil passage 104 through the oil supply passage 202. In this way, a part of the high-temperature oil is returned to the main tank 3 by the fourth spill valve 203, and the low-temperature oil is replenished to the low-pressure oil passage 104 by the replenishment pump 201, thereby controlling the oil temperature of the main circulation system 1.
Preferably, in the process, the pressure sensor 64 monitors the pressure of the oil inlet of the hydraulic pump 101 in real time, when the pressure of the oil inlet is lower than the lowest oil inlet pressure of the hydraulic pump 101, the third stop valve 803 enters a communicated state, and oil in the high-altitude oil supplementing tank 801 supplements oil to the oil inlet of the hydraulic pump 101 in time; when the inlet pressure is higher than the minimum inlet pressure of the hydraulic pump 101, the third cut-off valve 803 is in a closed state. This can avoid the problem of the pump 101 being empty due to the failure to supply enough oil when the oil replenishing pump 201 is in trouble.
When there is a demand for power generation, but the wind speed is less than the cut-in wind speed or greater than the cut-out wind speed. The wind wheel 4 stops rotating when entering a shutdown state, and the energy storage system 9 is used as a power unit to maintain the normal power generation of the generator 5.
Referring to fig. 1 and 3, the first stop valve 112 and the second stop valve 7 are in a connected state, the third stop valve 803 and the fifth stop valve 904 are in a disconnected state, the first oil port and the second oil port of the second direction valve 111 are connected, the third oil port is closed, and the oil replenishment pump 201 is in a stopped state. At this time, the high-pressure oil passage 103 is blocked by the fifth check valve 119, and the low-pressure oil passage 104 is directly connected to the main tank 3 by the second shutoff valve 7. Thus, an open hydraulic system is formed by the energy storage system 9 as a power unit, the variable displacement motor 102 as an execution unit and the main oil tank 3 as an oil return tank. High-pressure oil stored in the parallel accumulator group 901 enters the high-pressure oil path 103 through the energy storage oil path 902 and the second throttle 903, flows through the first stop valve 112 and the speed regulating valve 118, enters the variable displacement motor 102, drives the variable displacement motor 102 to rotate, and further drives the generator 5 to rotate to generate electric energy. The oil outlet of the variable displacement motor 102 outputs low-pressure oil, and the low-pressure oil flows to the main oil tank 3 after passing through the second reversing valve 111, the fourth check valve 116 and the second stop valve 7.
When there is no power generation demand, but the wind speed is between the cut-in wind speed and the cut-out wind speed. The wind speed condition meets the operation of the wind wheel 4, and the hydraulic pump 101 can be driven to output stable high-pressure oil, so that the energy storage system 9 stores the high-pressure oil output by the hydraulic pump 101.
As shown in fig. 1 and 4 in conjunction, the first cut valve 112 and the second cut valve 7 are in the cut-off state, and the fourth cut valve 115 and the fifth cut valve 904 are in the communication state. The first oil port of the first reversing valve 110 is connected with the second oil port, the third oil port is closed, the first oil port of the second reversing valve 111 is connected with the third oil port, the second oil port is closed, and the oil replenishing pump 201 is in a working state. At this time, the high-pressure oil passage 103 is blocked by the first blocking valve 112, and the low-pressure oil passage 104 is blocked by the second selector valve 111, so that the variable displacement motor 102 is isolated. The oil supplementing pump 201 sucks oil from the main oil tank 3, and delivers the oil to the oil inlet end of the hydraulic pump 101 through the oil supplementing oil path 202 and the third check valve 113, the hydraulic pump 101 outputs high-pressure oil under the driving of the wind wheel 4, and the high-pressure oil flows to the parallel accumulator 901 to be stored after passing through the fourth stop valve 115, the first reversing valve 110, the fifth check valve 119 and the fifth stop valve 904 in sequence. Wherein when the oil pressure in the high-pressure oil passage 103 exceeds the set pressure value of the first spill valve 105, the high-pressure oil flows to the main tank 3 through the first spill valve 105 and the fourth spill valve 203. At this time, the oil pressure at the oil outlet end of the fourth check valve 116 is greater than the oil pressure at the oil inlet end, and therefore is always in the closed state. In addition, if the wind speed suddenly drops and the drop amplitude is large in the process, in order to avoid the hydraulic impact in the high-pressure oil path from affecting the hydraulic pump 101 and the wind wheel 4, the pressure value of the first relief valve 105 needs to be properly reduced, and then the oil in the high-pressure oil path 103 needs to be properly depressurized. After the wind speed recovers to be stable, the pressure value of the first overflow valve 105 is gradually adjusted to be the safe pressure value of the system.
In addition, in the process, the on-off of the third stop valve 803 is controlled by adjusting the displacement of the oil replenishing pump 201 and checking the pressure of the oil inlet of the hydraulic pump 101 through the pressure sensor 64, and then the oil replenishing operation is performed on the hydraulic pump 101 by virtue of the high-altitude oil replenishing tank 801, so that the phenomenon of air suction of the oil inlet of the hydraulic pump 101 is avoided, and the normal operation of the hydraulic pump 101 is ensured.
When the wind generating set is normally stopped, firstly, the rotating speed of the wind wheel 4 is greatly reduced by means of the operation of blade pitch variation or blade tip spoiler throwing-out, then the hydraulic pump 101 and the variable motor 102 are subjected to speed reduction operation to reduce the rotating speeds of the wind wheel 4 and the generator 5 to zero, and finally, mechanical stopping is carried out by means of braking equipment. In this case, it is required to avoid hydraulic shock and suction during the deceleration operation of the hydraulic pump 101 and the variable displacement motor 102.
Referring to fig. 1 and 5, the first stop valve 112, the second stop valve 7, the third stop valve 803, and the fifth stop valve 904 are in a disconnected state, the fourth stop valve 115 is in a connected state, the first oil port and the third oil port of the first direction valve 110 and the second direction valve 111 are connected, the second oil port is closed, and the oil replenishment pump 201 is in an operating state. Thus, the main circulation system 1 is divided into two parts by the first direction changing valve 110, the first stop valve 112, the fourth check valve 116 and the second direction changing valve 111, one part is a large circulation system of the hydraulic pump 101, and oil is supplemented by the oil supplementing pump 201; the other part is a self-circulation system of the variable displacement motor 102, and self-priming oil is supplied from the main oil tank 3. The hydraulic pump 101 outputs high-pressure oil under the driving of the wind wheel 4, and the high-pressure oil flows to the hydraulic pump 101 again after passing through the fourth stop valve 115, the first reversing valve 110, the second overflow valve 106, the first check valve 108 and the third check valve 113, so that a closed-loop system is formed. Part of the high-temperature oil flowing through the second overflow valve 106 flows to the main oil tank 3 through the third overflow valve 107, and the oil replenishing pump 201 replenishes the oil to the oil inlet end of the hydraulic pump 101. In this way, the pressure load in the large circulation system of the hydraulic pump 101 is gradually increased by adjusting the set pressure value of the second relief valve 106 in real time from the zero pressure, thereby realizing the deceleration operation of the hydraulic pump 101. The oil liquid flowing out of the oil outlet of the variable motor 102 passes through the second reversing valve 111 and the speed regulating valve 118 and then flows into the variable motor 102 again to form a closed loop system, and meanwhile, the oil liquid is supplemented into the closed loop system from the main oil tank 3 through the second one-way valve 109, so that the phenomenon of air suction during the deceleration and parking processes of the variable motor 102 is avoided. In addition, in order to prevent the high-pressure oil in the high-pressure oil path 103 from flowing to the oil outlet end of the variable displacement motor 102 through the second directional valve 111 to affect the variable displacement motor 102, a check valve may be disposed between the third oil port of the second directional valve 111 and the high-pressure oil path 103, so as to prevent the high-pressure oil from flowing to the oil outlet end of the variable displacement motor 102 through the second directional valve 111.
When the wind generating set needs to be stopped urgently, for example, when the hydraulic system fails and the hydraulic pump is short of oil absorption, the hydraulic pump 101 is required to be stopped quickly, and hydraulic impact and suction phenomena are required to be avoided.
Referring to fig. 1 and 6, the third stop valve 803 is in a communication state, the first, fourth and fifth stop valves 112, 115 and 904 are in a closed state, the first and third oil ports of the second directional valve 111 are connected, the second oil port is closed, and the oil replenishment pump 201 is in a stopped state. Thus, the main circulation system 1 is cut into two parts by the first stop valve 112, the fourth stop valve 115, the third check valve 113 and the second direction changing valve 111, one part is a small circulation system of the hydraulic pump 101, and oil is supplemented by the high-level oil supplementing system 8; the other part is a self-circulation system of the variable displacement motor 102, and self-priming oil is supplied from the main oil tank 3. The hydraulic pump 101 outputs high-pressure oil under the driving of the wind wheel 4, and the high-pressure oil flows to the hydraulic pump 101 again after flowing through the sixth overflow valve 114, so that a closed hydraulic system is formed. Here, the pressure load in the small circulation system of the hydraulic pump 101 is gradually increased by adjusting the set pressure value of the sixth relief valve 114 in real time from zero pressure, thereby realizing the deceleration stop operation of the hydraulic pump 101. Meanwhile, under the action of atmospheric pressure, oil in the high-altitude oil supplementing tank 801 is supplemented to the oil inlet end of the hydraulic pump 101 through the first throttling valve 802 and the third stop valve 803. Thus, the hydraulic pump 101 is quickly stopped by shortening the length of the oil path of the circulation system and quickly supplying oil to the high-level oil supply system 8. The variable displacement motor 102 is the same as the normal shutdown process and will not be described again. In addition, the second cut-off valve 7 is in a communication state, so that the oil in the oil supply line 202 and a part of the low-pressure oil line can be quickly drained to the main oil tank 3 through the second cut-off valve 7.
Claims (6)
1. A hydraulic transmission type wind generating set is characterized by comprising a main circulating system, a ground oil supplementing system, a main oil tank, a wind wheel and a generator; wherein,
the main circulating system comprises a hydraulic pump, a variable motor, a high-pressure oil way, a low-pressure oil way, a first overflow valve, a second overflow valve, a third overflow valve, a first reversing valve, a second reversing valve, a first stop valve, a first one-way valve and a second one-way valve; the high-pressure oil way is positioned between an oil outlet of the hydraulic pump and an oil inlet of the variable displacement motor; the low-pressure oil way is positioned between an oil outlet of the variable motor and an oil inlet of the hydraulic pump; the first overflow valve is positioned between the high-pressure oil way and the low-pressure oil way; the first stop valve is positioned on the high-pressure oil way and close to the oil inlet end of the variable displacement motor; the first reversing valve is positioned in the high-pressure oil way and is a two-position three-way reversing valve and used for controlling connection between a first oil port and a second oil port or a third oil port, wherein the first oil port is connected with an oil outlet end of the hydraulic pump, the second oil port is connected with an oil inlet end of the variable motor, the third oil port is connected with an oil inlet of the second overflow valve, an oil outlet of the second overflow valve is connected with an oil inlet of the first one-way valve, and an oil outlet of the first one-way valve is connected with the low-pressure oil way; an oil inlet of the third overflow valve is positioned between the second overflow valve and the first one-way valve, and an oil outlet of the third overflow valve is connected with an oil return path; the second reversing valve is positioned in the low-pressure oil way, is a two-position three-way reversing valve and is used for controlling the connection between a first oil port and a second oil port or a third oil port, wherein the first oil port is connected with the oil outlet end of the variable motor, the second oil port is connected with the oil inlet end of the hydraulic pump, and the third oil port is connected with the high-pressure oil way and is positioned between the first stop valve and the oil inlet of the variable motor; an oil inlet of the second one-way valve is connected with the main oil tank, and an oil outlet of the second one-way valve is connected with a third oil port of the second reversing valve; the oil return oil way is connected with the main oil tank;
the ground oil supplementing system comprises an oil supplementing pump, an oil supplementing oil way, a fourth overflow valve and a fifth overflow valve; an oil inlet of the oil replenishing pump is connected with the main oil tank; one end of the oil supplementing oil path is connected with an oil outlet of the oil supplementing pump, and the other end of the oil supplementing oil path is connected with the low-pressure oil path; the fourth overflow valve is positioned between the low-pressure oil way and the oil return oil way; the fifth overflow valve is positioned between the oil supplementing oil way and the oil returning oil way;
the wind wheel is connected with an input shaft of the hydraulic pump;
the generator is connected with an output shaft of the variable displacement motor.
2. The hydraulically driven wind generating set of claim 1, further comprising a second shut-off valve positioned between the oil supply path and the oil return path.
3. The hydraulically driven wind generating set according to claim 1, further comprising an overhead oil supply system and a pressure sensor, the overhead oil supply system comprising an overhead oil supply tank, a first throttle valve and a third shut-off valve; the first throttle valve and the third stop valve are positioned between the high-altitude oil supplementing tank and an oil inlet of the hydraulic pump, and the third stop valve adopts an electromagnetic stop valve; the pressure sensor is positioned at the oil inlet end of the hydraulic pump and used for detecting the pressure of the oil inlet of the hydraulic pump and assisting in controlling the on-off of the third stop valve.
4. The hydraulically driven wind generating set of claim 1, wherein the primary circulation system further comprises a second check valve, a fourth stop valve, and a sixth relief valve; the second check valve is positioned at the oil inlet end of the hydraulic pump; the fourth stop valve is positioned on the high-pressure oil path and is close to an oil outlet end of the hydraulic pump; the sixth overflow valve is located between the high-pressure oil way and the low-pressure oil way, an oil inlet of the sixth overflow valve is located between an oil outlet of the hydraulic pump and the fourth stop valve, and an oil outlet of the sixth overflow valve is located between the oil inlet of the hydraulic pump and the second one-way valve.
5. The hydraulically driven wind generating set according to any one of claims 1 to 4, wherein the main circulation system further comprises a pressure-stabilizing accumulator located in the high-pressure oil path and near the oil inlet end of the first relief valve.
6. The hydraulically driven wind generating set according to any one of claims 1 to 4, wherein the primary circulation system further comprises a speed regulating valve, the speed regulating valve being located at an oil inlet of the variable displacement motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720312010.8U CN206738078U (en) | 2017-03-28 | 2017-03-28 | A kind of hydraulic drive type wind power generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720312010.8U CN206738078U (en) | 2017-03-28 | 2017-03-28 | A kind of hydraulic drive type wind power generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206738078U true CN206738078U (en) | 2017-12-12 |
Family
ID=60558434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720312010.8U Expired - Fee Related CN206738078U (en) | 2017-03-28 | 2017-03-28 | A kind of hydraulic drive type wind power generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206738078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738593A (en) * | 2020-05-29 | 2021-12-03 | 北京金风科创风电设备有限公司 | Test system of hydraulic variable pitch system of wind generating set |
-
2017
- 2017-03-28 CN CN201720312010.8U patent/CN206738078U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738593A (en) * | 2020-05-29 | 2021-12-03 | 北京金风科创风电设备有限公司 | Test system of hydraulic variable pitch system of wind generating set |
| CN113738593B (en) * | 2020-05-29 | 2023-08-22 | 北京金风科创风电设备有限公司 | Test system of hydraulic pitch system of wind generating set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106870289B (en) | Hydrostatic energy storage type hydraulic drive wind generating set and control method | |
| US8502402B2 (en) | Power generating apparatus of renewable energy type and control method thereof | |
| WO2021114943A1 (en) | Yaw braking system of wind power generator set, and control method therefor | |
| CN102606397B (en) | A wind turbine and a method for powering one or more hydraulic pitch actuators | |
| CN110805521B (en) | Novel frequency modulation control system and control method for energy storage type hydraulic wind generating set | |
| CN104066977A (en) | Power generating system and hydraulic control system | |
| CN107781111A (en) | Energy storage type hydraulic wind power generating set primary frequency control system and control method | |
| CN110985295B (en) | Grid-connected rotating speed control method for energy storage type hydraulic wind generating set | |
| CN206738078U (en) | A kind of hydraulic drive type wind power generating set | |
| CN201347838Y (en) | Hydraulic system for wind generating set | |
| CN208153248U (en) | A kind of hydraulic energy-accumulating generating set | |
| EP3712427A1 (en) | Wind turbine | |
| CN204532690U (en) | With the Wind turbines water brake power plant that automatically controlled wind wheel lock is tight | |
| CN206738065U (en) | A kind of hydrostatic storage formula hydraulic drive type wind power generating set | |
| CN201739083U (en) | Mechanical transmission dynamic hydraulic system of wind power generator | |
| CN105649874B (en) | Based on modular MW class offshore wind generating redundant hydraulic system and method | |
| CN108131248A (en) | A kind of low wind speed activation system of hydraulic pressure wind power generator group | |
| CN206738079U (en) | A kind of hydraulic drive type wind power generating set | |
| US9920743B2 (en) | Wind turbine deceleration method and system | |
| CN207935183U (en) | A kind of hydraulic energy-accumulating type wind power generating set | |
| EP3017190A1 (en) | Overrun protection for wind turbines | |
| CN104747371A (en) | Wind turbine generator hydraulic braking power device with electronic control wind wheel locking effect | |
| CN102052250B (en) | Wind driven generator set and variable propeller pitch system thereof | |
| CN208089461U (en) | A kind of wind power generating set braked and locked using hydraulic cushion | |
| CN113162114A (en) | Hydraulic wind power generation high voltage ride through control system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20190328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |