阅读说明：本技术 一种风力液压发电系统及其应用方法 (Wind power hydraulic power generation system and application method thereof ) 是由 常典军 于 2018-06-20 设计创作，主要内容包括：针对现有技术中风电设置控制不灵活的问题,本发明提供一种风力液压发电系统及其应用方法,包括风动叶片、风动叶片旋转驱动的液压泵、连接液压泵输出端的高压罐、输入端均与高压罐输出端连通的多个并行的用于发电的液压马达、与液压马达输出端同时连接的低压罐；其中,所述的低压罐与液压泵的输入端连通设置,其中,所述的高压罐内初始状态设置有最低工作气压,其技术方案在于：所述的高压罐内还设置有高压罐压力测量装置,该高压罐压力测量装置电连接至用于根据高压罐内气体压力与最低工作气压的比较值而动态的分配一个或多个液压马达工作的控制装置,本发明电能输出更加稳定,能源利用率高。(The wind power hydraulic power generation system comprises a wind driven blade, a hydraulic pump rotationally driven by the wind driven blade, a high-pressure tank connected with the output end of the hydraulic pump, a plurality of parallel hydraulic motors with the input ends communicated with the output end of the high-pressure tank and used for power generation, and a low-pressure tank simultaneously connected with the output end of the hydraulic motors, wherein the wind driven blade is connected with the hydraulic pump; wherein, the input intercommunication setting of low pressure jar and hydraulic pump, wherein, the high-pressure jar in initial condition be provided with minimum working pressure, its technical scheme lies in: the high-pressure tank is internally provided with a high-pressure tank pressure measuring device which is electrically connected to a control device used for dynamically distributing one or more hydraulic motors to work according to the comparison value of the gas pressure in the high-pressure tank and the lowest working air pressure.)

1. A wind power hydraulic power generation system comprises a wind driven blade (1), a hydraulic pump (2) rotationally driven by the wind driven blade (1), a high-pressure tank (3) connected with the output end of the hydraulic pump (2), a plurality of parallel hydraulic motors (4) with input ends communicated with the output end of the high-pressure tank (3) and used for generating power, and a low-pressure tank (5) simultaneously connected with the output end of the hydraulic motors (4); wherein, low-pressure tank (5) and the input intercommunication setting of hydraulic pump (2), wherein, the initial condition in high-pressure tank (3) be provided with minimum working pressure, the pressure of this minimum working pressure promotes the produced kinetic energy of liquid in hydraulic motor (4) input pipeline and is equated with the minimum limit value that a hydraulic motor (4) can work, its characterized in that: the high-pressure tank (3) is also internally provided with a high-pressure tank pressure measuring device, and the high-pressure tank pressure measuring device (901) is electrically connected to a control device (9) for dynamically distributing the work of one or more hydraulic motors (4) according to the comparison value of the gas pressure in the high-pressure tank (3) and the lowest working gas pressure.

2. A hydraulic wind power system according to claim 1, characterized in that: also comprises a gas storage tank (6); the air inlet end of the air storage tank (6) is connected with the output end of the air pump (7); the output end of the gas storage tank (6) is communicated with the high-pressure tank (3) and is used for providing gas with the lowest working pressure for the high-pressure tank (3) in the initial working state; wherein, an inflation one-way valve (907) is arranged on a pipeline connecting the air pump (7) and the air storage tank (6); a pressurization controllable one-way valve (902) is arranged between the air storage tank (6) and the high-pressure tank (3); the air pump (7) and the pressurization controllable one-way valve (902) are both connected to the control device (9).

3. A hydraulic wind power system according to claim 1, characterized in that: a high-pressure input one-way valve (908) is arranged on a pipeline for communicating the output end of the hydraulic pump (2) with the high-pressure tank (3); the output ends of the high-pressure tank (3) for outputting liquid to the hydraulic motor (4) are respectively provided with a work selection controllable one-way valve (903); a low-pressure input check valve (909) is arranged on a pipeline between the input end of the hydraulic pump (2) and the low-pressure tank (5); the work selection controllable one-way valves (903) are all electrically connected with the control device (9).

4. A hydraulic wind power system according to claim 1, characterized in that: the wind energy storage device also comprises a standby energy storage tank (8) for storing wind energy allowance when the external wind force is too large to cause the air pressure in the high-pressure tank (3) to be too high; wherein the output end of the standby energy storage tank (8) is communicated with the output end of the high-pressure tank (3), and the input end of the standby energy storage tank (8) is communicated with the input end of the high-pressure tank (3); wherein, the input end of the standby energy storage tank (8) is provided with a peak protection controllable one-way valve (904) which is opened when the pressure of the gas in the high-pressure tank (3) reaches a maximum limit value; the peak protection controllable one-way valve (904) is electrically connected to the control device (9); the output end of the standby energy storage tank (8) is provided with a standby tank output controllable one-way valve (9010) which is closed under the condition that the air pressure in the high-pressure tank (3) is stable; wherein, a spare tank pressure measuring device (905) for measuring the air pressure in the spare energy storage tank (8) is arranged in the spare energy storage tank (8); wherein, the peak protection controllable one-way valve (904) and the spare tank pressure measuring device (905) are both electrically connected to the control device (9); the initial state in the standby energy storage tank (8) is provided with the lowest working air pressure.

5. A hydraulic wind power system according to claim 1, characterized in that: the device also comprises a temperature measuring device (906) which is arranged in the high-pressure tank (3) and is used for measuring the temperature of the liquid in the high-pressure tank (3); the temperature measuring device (906) is electrically connected to the control device (9).

6. A hydraulic wind power system according to claim 1, characterized in that: the control device (9) also comprises a control chip, a display and an alarm unit for performing sound-light alarm when the collected temperature data exceeds a limit value by the control chip; the control chip is used for receiving a pressure value in the high-pressure tank pressure measuring device (901), comparing the pressure value with a set value to obtain a pressure difference value, dynamically distributing one or more hydraulic motors (4) to work according to the pressure difference value, and displaying the states of the working hydraulic motors (4) and the non-working hydraulic motors (4) on the display.

7. A method of application of a hydraulic wind power system according to claim 1, characterized in that: when the hydraulic pump (2) rotationally driven by the pneumatic blade (1) works, liquid in the low-pressure tank (5) is pumped into the high-pressure tank (3), gas in the high-pressure tank (3) is compressed, the control device (9) reads gas pressure in the high-pressure tank (3) collected by the high-pressure tank pressure measuring device (901) at intervals of time T and compares the gas pressure with the lowest working air pressure, and the lowest hydraulic motor (4) works or at most all the hydraulic motors (4) work according to the comparison value obtained by comparing the gas pressure with the parameters of the hydraulic motors (4).

Technical Field

The invention belongs to the field of wind power generation devices, and particularly relates to a wind power hydraulic power generation system and an application method thereof.

Background

Wind is one of pollution-free energy sources. Moreover, it is inexhaustible. The wind power generation device is very suitable for and can be used for generating electricity by utilizing wind power according to local conditions in coastal islands, grassland pasturing areas, mountain areas and plateau areas with water shortage, fuel shortage and inconvenient traffic. Wind energy is increasingly gaining attention as a clean renewable energy source in all countries of the world. The energy storage capacity is huge, the global wind energy is about 2.74 multiplied by 109MW, and the available wind energy is 2 multiplied by 107MW which is 10 times larger than the total amount of water energy which can be developed and utilized on the earth. China is rich in wind energy resources, and the wind energy storage capacity capable of being developed and utilized is about 10 hundred million kW, wherein the wind energy storage capacity on land is about 2.53 hundred million kW (data calculation of 10m height above the ground), and the wind energy storage capacity capable of being developed and utilized on the sea is about 7.5 hundred million kW, and the total is 10 hundred million kW. Wind power generation is to convert kinetic energy of wind into mechanical kinetic energy and then convert the mechanical energy into electrical kinetic energy. The principle of wind power generation is that wind power is used to drive windmill blades to rotate, and then a transmission mechanism is used to drive a generator to rotate, so that the purpose of generating power is achieved. According to current windmill technology, the generation of electricity can be started at a breeze speed (in the order of breeze) of about three meters per second. Wind power generation is forming a hot tide in the world because it does not require the use of fuel and does not produce radiation or air pollution. In addition to the conventional blade rotation to drive the generator to generate electricity through the conversion of wind energy to mechanical energy, the conventional blade rotation generator also includes a technical scheme of utilizing wind energy to hydraulic pressure to drive a hydraulic motor to work, as disclosed in patent document CN 101191457. Although the technical scheme can realize and improve the utilization rate of wind energy to a certain extent, the problem of unstable wind energy cannot be solved. If the external wind force is too small, the blades rotate slowly, and the hydraulic pump cannot work, so that certain loss is caused. Moreover, under the condition of overlarge external wind power, the working power of the hydraulic motor is constant, so that energy at the peak value, namely the maximum wind power, is lost, the conversion of wind energy into electric energy is unstable, and the conversion rate is low.

There is also a technical solution as disclosed in patent document CN104234939, which solves the problem of minimizing and maximizing peak wind power to some extent, and proposes the concept of an energy accumulator, but only the function of the energy accumulator is described, and there is no specific implementation way. It is therefore not easy in the current state of the art to find an inexpensive "energy storage" that can store/discharge energy.

Meanwhile, more importantly, although the technical scheme with the energy accumulator solves the problems of peak value and valley of wind power to a certain extent, the principle disclosed by the technical scheme is that a wind power receiving device is directly connected with one energy accumulator and is directly connected with one hydraulic motor for output, and therefore control is inflexible in the operation process. If any one of the three links has a problem, the whole wind power system is paralyzed and cannot be used, and the development of wind power is greatly limited. Also, in this mode, although the "energy accumulator" reduces the loss of wind power and improves the efficiency of wind power application, since the power of the hydraulic motor is constant and the wind power required to be rotated by the wind power receiving device is constant, when the wind power generation equipment is initially selected, a higher power generator is inevitably selected in order to output a certain amount of electric power, and a high power generator itself is expensive.

The existing method has the advantages that the output of the wind power plant is random due to the fact that the wind speed changes are random, the capacity reliability of the wind power plant is low due to the characteristic of the wind power plant, and difficulty is brought to active and reactive power balance scheduling of a power grid.

Large wind farms and their surrounding areas often have large voltage fluctuations. Mainly because of the following three cases. When the wind generating set is started, a large impact current can still be generated. The impact of grid connection of a single wind generating set on the voltage of a power grid is relatively small, but the impact basically disappears after the grid connection process lasts for at least a period of time (about tens of seconds), and sudden drop of the voltage of the power grid can be caused by direct grid connection of a plurality of wind generating sets.

Therefore, the existing processing means is that a plurality of wind generating sets adopt a grouping grid-connection means when in grid connection, and certain interval time is needed. When the wind speed exceeds the cut-out wind speed or a fault occurs, the wind driven generator can automatically exit from the grid-connected state from the rated output state, the grid voltage suddenly drops when the wind driven generator set is disconnected, and the operation voltage of the wind power plant before disconnection is raised by the aid of more capacitors at the generator end, so that the grid voltage drops greatly.

Likewise, changes in wind farm wind speed conditions will cause voltage fluctuations in and around the wind farm. For example, when the average wind speed of the wind farm is increased, the active power input into the system is increased, the bus voltage of the wind farm is reduced and then increased. This is because when the wind field input power is small, the voltage rise value caused by inputting active power is small, and the voltage drop caused by absorbing reactive power is large; when the wind field input power is increased, the voltage rising value caused by inputting active power is increased greatly, and the voltage drop caused by absorbing reactive power is increased less. If the generator side capacitance compensation is considered, the voltage of the wind farm is increased. Particularly, when equivalent impedance between a wind power plant and a system is large, voltage fluctuation caused by wind speed variation is more obvious, and if a three-phase ground fault occurs at a certain position in a wind power network, voltage collapse of the whole network can be caused.

Therefore, the output of the conventional wind power generation is extremely unstable and even can not be connected to the grid. Therefore, a wind power hydraulic power generation system which is flexible in control and low in cost and can solve the problem of impact on a power grid when the wind speed of a wind farm is unstable and an application method thereof are urgently needed to be researched and developed.

Disclosure of Invention

Aiming at the problems that wind power setting and control are not flexible and high-power generation equipment is expensive in the prior art, the invention provides the wind power hydraulic power generation system and the application method thereof, which can flexibly process energy conversion in the wind power generation process and effectively solve the problems. The wind power hydraulic power generation system comprises a wind driven blade, a hydraulic pump driven by the rotation of the wind driven blade, a high-pressure tank connected with the output end of the hydraulic pump, a plurality of parallel hydraulic motors with the input ends communicated with the output end of the high-pressure tank and used for power generation, and a low-pressure tank simultaneously connected with the output end of the hydraulic motors; wherein, the input intercommunication setting of low-pressure jar and hydraulic pump, wherein, the initial condition in the high-pressure jar be provided with minimum working pressure, the produced kinetic energy of liquid is equated with the minimum limit value that a hydraulic motor can work in this minimum working pressure's pressure promotion hydraulic motor input pipeline, its technical scheme lies in: the high-pressure tank is internally provided with a high-pressure tank pressure measuring device which is electrically connected to a control device used for dynamically distributing the work of one or more hydraulic motors according to the comparison value of the gas pressure in the high-pressure tank and the lowest working gas pressure;

further, the wind power hydraulic power generation system further comprises an air storage tank; the air inlet end of the air storage tank is connected with the output end of the air pump; the output end of the gas storage tank is communicated with the high-pressure tank and is used for providing gas with the lowest working pressure for the high-pressure tank in the initial working state; wherein, an inflation one-way valve is arranged on a pipeline connecting the air pump and the air storage tank; a pressurization controllable one-way valve is arranged between the gas storage tank and the high-pressure tank; the air pump and the pressurization controllable one-way valve are both connected to the control device;

furthermore, a high-pressure input one-way valve is arranged on a pipeline for communicating the output end of the hydraulic pump with the high-pressure tank; the output ends of the high-pressure tanks for outputting liquid to the hydraulic motor are respectively provided with a work selection controllable one-way valve; a low-pressure input one-way valve is arranged on a pipeline between the input end of the hydraulic pump and the low-pressure tank; the work selection controllable one-way valves are all electrically connected with the control device;

further, the wind power hydraulic power generation system further comprises a standby energy storage tank for storing wind energy surplus when the air pressure in the high-pressure tank is too high due to too large external wind power; the output end of the standby energy storage tank is communicated with the output end of the high-pressure tank, and the input end of the standby energy storage tank is communicated with the input end of the high-pressure tank; the input end of the standby energy storage tank is provided with a peak protection controllable one-way valve which is opened when the pressure of gas in the high-pressure tank reaches a maximum limit value; the peak protection controllable one-way valve is electrically connected to the control device; the output end of the standby energy storage tank is provided with a standby tank output controllable one-way valve which is turned off under the condition that the air pressure in the high-pressure tank is stable; the pressure measuring device of the standby energy storage tank is used for measuring the air pressure in the standby energy storage tank; the peak protection controllable one-way valve and the spare tank pressure measuring device are electrically connected to the control device; the minimum working air pressure is set in the initial state in the standby energy storage tank;

furthermore, the wind power hydraulic power generation system also comprises a temperature measuring device which is arranged in the high-pressure tank and is used for measuring the temperature of the liquid in the high-pressure tank; the temperature measuring device is electrically connected to the control device;

furthermore, the control device also comprises a control chip, a display and an alarm unit for performing sound-light alarm when the collected temperature data exceeds a limit value; the control chip is used for receiving a pressure value in the pressure measuring device of the high-pressure tank, comparing the pressure value with a set value to obtain a pressure difference value, dynamically distributing one or more hydraulic motors to work according to the pressure difference value, and displaying the states of the working hydraulic motors and the non-working hydraulic motors on the display;

an application method of a hydraulic wind power generation system is characterized in that: when the hydraulic pump driven by the rotation of the pneumatic blade works, liquid in the low-pressure tank is pumped out and enters the high-pressure tank, gas in the high-pressure tank is compressed, the control device reads the gas pressure in the high-pressure tank collected by the high-pressure tank pressure measuring device at intervals of time T and compares the gas pressure with the lowest working pressure, and the lowest hydraulic motor or the maximum total hydraulic motors are distributed to work according to the comparison value obtained and the parameters of the hydraulic motors.

The invention has the beneficial effects that: the invention dynamically distributes one or more hydraulic motors to work according to the comparison value of the gas pressure in the high-pressure tank and the lowest working gas pressure so as to finish the power generation work, and can select the hydraulic motors with smaller power to form a power generation array without purchasing expensive high-power generation devices. During the process from receiving wind power to compressing the gas in the high-pressure tank for energy storage, the compressed air in the high-pressure tank pushes liquid outwards into the hydraulic motor within the time T, each link is independent, the pneumatic blades and the hydraulic pump are combined, but the hydraulic motor driven by the gas in the high-pressure tank is selected by the control device, namely a customer, and if one hydraulic motor fails, the work of other hydraulic motors is not influenced. Moreover, the existence of the high-pressure tank can be used for storing the wind energy in a valley, peak staggering of the wind power can be realized by matching with the standby energy storage tank, and the utilization rate of the wind energy is greatly improved. And through the gas compression in the high-pressure tank, drive the electricity generation to hydraulic motor again, can make electric energy output more stable, provide the prerequisite for being incorporated into the power networks.

Drawings

FIG. 1 is a schematic diagram of the present invention. Wherein, 1, the wind blade; 2. a hydraulic pump; 3. a high-pressure tank; 4. a hydraulic motor; 5. a low pressure tank; 6. a gas storage tank; 7. an air pump; 8. a standby energy storage tank; 9. a control device; 901. a high pressure tank pressure measurement device; 902. a pressurized controllable one-way valve; 903. a controllable one-way valve is selected for work; 904. a peak protection controllable one-way valve; 905. a reserve tank pressure measurement device; 906. a temperature measuring device; 907. an inflation check valve; 908. a high pressure input check valve; 909. a low pressure input check valve; 9010. the standby tank outputs a controllable one-way valve. The thick lines in fig. 1 represent high-pressure lines and the thin lines represent low-pressure lines, while the triangles in fig. 1 represent the flow direction of the liquid in the lines.

Detailed Description

The invention will be further described with reference to the accompanying drawings. As shown in fig. 1, the wind power hydraulic power generation system includes a wind power blade 1, a hydraulic pump 2 rotationally driven by the wind power blade 1, a high-pressure tank 3 connected to an output end of the hydraulic pump 2, a plurality of parallel hydraulic motors 4 having input ends communicated with an output end of the high-pressure tank 3 and used for generating power, and a low-pressure tank 5 simultaneously connected to output ends of the hydraulic motors 4; wherein, low-pressure tank 5 with the input intercommunication setting of hydraulic pump 2, wherein, the initial condition be provided with minimum working pressure in high-pressure tank 3, the produced kinetic energy of liquid is equated with the minimum limit value that a hydraulic motor 4 can work in 4 input end pipeline of this pressure push hydraulic motor of minimum working pressure, its technical scheme lies in: the high-pressure tank 3 is also provided with a high-pressure tank pressure measuring device 901, and the high-pressure tank pressure measuring device 901 is electrically connected to a control device 9 for dynamically distributing the work of one or more hydraulic motors 4 according to the comparison value of the gas pressure in the high-pressure tank 3 and the lowest working gas pressure. It is to be understood that: the rotation of the wind blade 1 driving the hydraulic pump 2 is a common driving structure in the art and the structure thereof is not described herein in an excessive way. It is to be understood that: wind blade 1 means a blade which is rotated by wind energy, such as a blade for a conventional wind generator. It is to be understood that: the initial state of the high-pressure tank 3 is set with the minimum working air pressure calculated from the amount of hydraulic pressure required for the single operation of the purchased hydraulic motor 4 in the initial state of installing the present invention. The value can also be adjusted to the actual situation. Or after manual adjustment when replacing the hydraulic motor 4. It is to be understood that: the air pressure in the high-pressure tank 3 has a range, the lowest value of the air pressure is the lowest working air pressure, and the highest value of the air pressure can be set according to the rated air pressure value of the actual high-pressure tank 3. It is to be understood that: air as a mixed gas starts to condense at the dew point of (81.7K) under the normal atmospheric pressure of 101.3KP, and all the air is converted into saturated liquid when the temperature is reduced to 78.9K (bubble point). Therefore, the air in the high-pressure tank 3 is compressed but cannot become liquid. It is to be understood that: the control device 9 collects pressure data in the pressure measurement device 901 of the high-pressure tank, compares the pressure data with a set minimum working air pressure to obtain a comparison value, and sets the hydraulic motor 4 capable of working according to the comparison value. Further, the hydraulic wind power generation system further comprises an air storage tank 6; the air inlet end of the air storage tank 6 is connected with the output end of the air pump 7; the output end of the gas storage tank 6 is communicated with the high-pressure tank 3 and is used for providing gas with the lowest working pressure for the high-pressure tank 3 in the initial working state; wherein, an inflation one-way valve 907 is arranged on a pipeline connecting the air pump 7 and the air storage tank 6; a pressurization controllable one-way valve 902 is arranged between the gas storage tank 6 and the high-pressure tank 3; the air pump 7 and the pressure-controllable non-return valve 902 are both connected to the control device 9. It is to be understood that: the gas storage tank 6 may be selectively used in actual production, and if the sealing performance of each component according to the present invention is good, the gas storage tank 6 is used to provide the lowest operating gas pressure to the high-pressure tank 3 in the initial state. Alternatively, the liquid may be pumped into the high-pressure tank 3 by the hydraulic pump 2 to compress air until the pressure in the high-pressure tank 3 reaches the minimum working pressure at the initial stage of the use of the equipment. In this case, the air tank 7 and the device for providing the lowest operating air pressure to the high-pressure tank 3 with which the air tank 7 is concerned may not be used. Further, a high-pressure input one-way valve 908 is arranged on a pipeline for communicating the output end of the hydraulic pump 2 with the high-pressure tank 3; the output ends of the high-pressure tank 3 for outputting liquid to the hydraulic motor 4 are provided with work selection controllable one-way valves 903; a low-pressure input check valve 909 is arranged on a pipeline between the input end of the hydraulic pump 2 and the low-pressure tank 5; the work selection controllable one-way valves 903 are all electrically connected with the control device 9. It is to be understood that: the control device 9 controls the on/off of the work selection controllable one-way valve 903, and is a common technical means in the field of computers. It is to be understood that: the one-way valve is a valve which can only flow along the water inlet and can not return the medium at the water outlet. The operation selection controllable check valve 903 is a valve element commonly known in the art. It is to be understood that: the low pressure tank 5 is large enough that the liquid in it is sufficient to compress the air in the high pressure tank 3 and the spare energy storage tank 8. Further, the hydraulic wind power generation system further comprises a standby energy storage tank 8 for storing wind energy allowance when the air pressure in the high-pressure tank 3 is too high due to too large external wind force; wherein, the output end of the standby energy storage tank 8 is communicated with the output end of the high-pressure tank 3, and the input end of the standby energy storage tank 8 is communicated with the input end of the high-pressure tank 3; wherein, the input end of the standby energy storage tank 8 is provided with a peak protection controllable one-way valve 904 which is opened when the pressure of the gas in the high-pressure tank 3 reaches the highest limit value; the peak protection controllable one-way valve 904 is electrically connected to the control device 9; the output end of the standby energy storage tank 8 is provided with a standby tank output controllable one-way valve 9010 which is turned off under the condition that the air pressure in the high-pressure tank 3 is stable;

a spare energy storage tank 8 is internally provided with a spare tank pressure measuring device 905 for measuring the air pressure in the spare energy storage tank 8; the peak protection controllable one-way valve 904 and the spare tank pressure measuring device 905 are both electrically connected to the control device 9; the initial state in the standby energy storage tank 8 is provided with the lowest working air pressure. It is to be understood that: the standby energy storage tank 8 and the high-pressure tank 3 have the same air pressure requirement, when the pressure of the gas in the high-pressure tank 3 reaches the maximum limit value, the control device 9 reduces the air pressure in the high-pressure tank 3 by opening the peak protection controllable one-way valve 904 and the standby tank output controllable one-way valve 9010, so that the whole utilization of wind energy is ensured, meanwhile, the safety of the hydraulic motor 4 is also protected, and the hydraulic motor 4 is prevented from being damaged. It is to be understood that: the control device 9 controls the opening and closing of the peak protection controllable check valve 904 and the spare tank output controllable check valve 9010 is prior art and will not be described in detail herein. It is to be understood that: after the peak value of the external wind power passes, the pressure value detected by the high-pressure tank pressure measuring device 901 in the high-pressure tank 3 tends to be stable, and at this time, the external wind power is judged to be constant. Excess energy is stored by turning off the peak protection controllable check valve 904 and the spare tank output controllable check valve 9010. When the external wind power is too small, the system can not work, the standby tank is opened to output the controllable one-way valve 9010 to provide energy for the system, and compensation type power generation is carried out. The process of the compensated power generation coincides with the process of the high-pressure tank 3 alone supplying pressure. It is to be understood that: the compensation type power generation process comprises the following steps: if the external wind power is too small, the gas pressure in the high-pressure tank 3 is compared with the lowest working air pressure, the obtained comparison value is compared with the parameter of the hydraulic motor 4, and the parameter is not enough to drive one hydraulic motor 4 to work, the valve at the input end of the hydraulic motor 4 is closed until the next detection time period T; or compensation type power generation is carried out by collecting data of the pressure measuring device 905 of the standby tank; if the gas pressure in the high-pressure tank 3 is compared with the lowest working gas pressure, and the obtained comparison value is compared with the parameters of the hydraulic motors 4 to drive a plurality of hydraulic motors 4 to work, the control device 9 randomly distributes a proper amount of the hydraulic motors 4 to work. It is to be understood that: the number of the standby energy storage tanks 8 is not limited to a specific number, and can be adjusted according to actual conditions. In order to ensure safety, a spare tank pressure measuring device 905 is arranged inside the spare energy storage tank 8 and used for sending pressure data to the control device 9 and reflecting energy storage and power generation conditions. Further, a hydraulic wind power generation system further includes a temperature measuring device 906 provided in the high-pressure tank 3 for measuring a temperature of the liquid inside the high-pressure tank 3; the temperature measuring device 906 is electrically connected to the control device 9. It is to be understood that: since the pressure in the high-pressure tank 3 is relatively high, the liquid and air in the high-pressure tank may overheat, and if the overheat occurs, the control device 9 is required to reduce the air pressure in the high-pressure tank 3 by opening the peak protection controllable check valve 904 and the spare tank output controllable check valve 9010, so as to ensure the safety of the present invention. It is to be understood that: the control device 9 is a common technical scheme in the field of computers for acquiring temperature data. Furthermore, the control device 9 further comprises a control chip, a display and an alarm unit for performing sound-light alarm when the collected temperature data exceeds a limit value; the control chip is configured to receive a pressure value in the high-pressure tank pressure measurement device 901, compare the pressure value with a set value to obtain a pressure difference value, dynamically allocate one or more hydraulic motors 4 to operate according to the pressure difference value, and display states of the hydraulic motors 4 that are operating and not operating on the display. It is to be understood that: the collected data are processed by the control chip, and the difference between the collected data and the set data is calculated to output corresponding instructions, and operations such as display in a display, shutoff/closing of a valve and the like are common technical means in the prior art. It is to be understood that: the high-pressure tank pressure measuring device 901 may be a pressure sensor. It is to be understood that: the spare tank pressure measuring device 905 may be a pressure sensor. It is to be understood that: the temperature measuring device 906 may be a temperature sensor. It is to be understood that: the alarm unit of the sound-light alarm can be a buzzer and a light-emitting diode. It is to be understood that: the control chip can be a single chip microcomputer. It is to be understood that: the pressurization controllable check valve 902, the work selection controllable check valve 903, the peak protection controllable check valve 904, the inflation check valve 907, the high pressure input check valve 908, the low pressure input check valve 909 and the spare tank output controllable check valve 9010 which are described herein are all elements which are practically available in the prior art, and are selected according to specific situations during use. An application method of a hydraulic wind power generation system is characterized in that: when the hydraulic pump 2 driven by the rotation of the pneumatic blade 1 works, liquid in the low-pressure tank 5 is pumped out and enters the high-pressure tank 3, gas in the high-pressure tank 3 is compressed, the control device 9 reads the gas pressure in the high-pressure tank 3 collected by the high-pressure tank pressure measuring device 901 at intervals of time T and compares the gas pressure with the lowest working gas pressure, the comparison value is compared with the parameters of the hydraulic motors 4, and the controllable one-way valve 903 is controlled to select the lowest hydraulic motor 4 to work or the maximum total hydraulic motors 4 to work. The invention stores energy in an unstable wind field by a method of compressing gas in a high-pressure tank 3, and utilizes the existing wind driven blades 1 receiving wind power to be matched with hydraulic motors 4 with different models or the same model and selectable power (a plurality of hydraulic motors with small power can be selected) to form a wind power generation cluster, thereby avoiding high price of purchasing high-power equipment. Meanwhile, if one of the plurality of hydraulic motors 4 fails, the control device 9 can distribute the work of other hydraulic motors 4 through the controllable check valve 903, so as to achieve the purpose of long-time stable operation. Similarly, after the gas in the high-pressure tank 3 is compressed, a new energy storage mechanism is formed, and an external unstable wind field is changed into stable compressed gas energy, so that the high-pressure gas energy storage device is more stable when being incorporated into a power grid, voltage impact is avoided, and the operation of the power grid is protected. The high-pressure tank 3 can well store the low valley of wind energy and match with the standby energy storage tank 8 to realize peak staggering of wind power, so that the utilization rate of the wind energy is greatly improved, the wind energy storage device is also suitable for various wind fields, the application range is expanded, and the reliability is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.