Wind power direct air compression energy storage power generation system

Abstract

The utility model discloses a wind power direct air compression energy storage and power generation system, relates to the technical field of wind power energy storage and power generation, and aims to solve the problem of low efficiency of the existing wind power generation. The wind power direct air compression energy storage and power generation system comprises a wind turbine, and the output end of the wind turbine is connected with a compressor through a variable-speed motor; the output end of the compressor communicates with a heat storage heat exchanger, an air outlet of the heat storage heat exchanger communicates with high-pressure air storage equipment, the output end of the high-pressure air storage equipment communicates with a pressure stabilizing preheating device, and the output end of the pressure stabilizing preheating device communicates with an expansion machine. And the output end of the expansion machine is communicated with a main generator.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind energy storage power generation, specifically relates to a kind of wind power direct compression air energy storage power generation system. BACKGROUND

[0002] Wind power generation refers to the kinetic energy of wind into electric energy, the current horizontal axis wind turbine has the following four shortcomings: power generation is unstable. Wind power generator power generation is unstable due to the strength of wind, which brings certain pressure to power grid and power transmission equipment;Cannot delay power generation, causing the discontinuity of power transmission, and bringing great inconvenience to users;Abandoning wind phenomenon is common, due to the reason of power grid peak and valley, and has to be frequently stopped, that is, abandoning wind. Wind loss phenomenon is also very prominent. Due to the limitation of power grid, the speed of wind turbine has to be controlled in strong wind weather, that is, the excess wind power is wasted, which wastes part of wind energy.

[0003] Due to the above four reasons, the efficiency of the previous wind power generation mode is not high enough, and the cost recovery is slow, which is not suitable for the rapid development of power demand in China.

[0004] And the previous mode of using low valley electricity for compression air energy storage power generation, the overall energy conversion rate is not optimistic, and the process is electricity, storage and electricity. This way contains two power generation processes, so it will cause large loss, long payback period, especially the low valley electricity price is getting closer and closer to the high valley electricity price, so there is no profit space. UTILITY MODEL CONTENTS

[0005] To solve the above problems, that is, the problem of low efficiency of existing wind power generation, the utility model provides a kind of wind power direct compression air energy storage power generation system, which comprises a wind turbine, the output end of the wind turbine is connected with a compressor through a speed changer, for driving the compressor to work, the output end of the compressor is communicated with a heat storage heat exchanger, the gas outlet of the heat storage heat exchanger is communicated with a high-pressure gas storage device, the output end of the high-pressure gas storage device is communicated with a pressure stabilizing preheating device, the output end of the pressure stabilizing preheating device is communicated with an expander, and the output end of the expander is communicated with a main generator.

[0006] The utility model further provides that: the wind turbine is provided with a magnetic speed controller.

[0007] The utility model further provides that: the output end of the wind turbine is further connected with a auxiliary generator, the output end of the auxiliary generator is electrically connected with the magnetic speed controller and the heat storage heat exchanger, and the output end of the auxiliary generator is further electrically connected with a storage battery.

[0008] The utility model discloses a further setting for: the pressure stabilizing preheating device includes pressure stabilizing tank, install air intake regulating valve, air outlet regulating valve and gravity piston in the pressure stabilizing tank, air intake regulating valve with air outlet regulating valve set in the below of gravity piston, the below of gravity piston is connected with the valve core of air intake regulating valve through drawstring, the valve core upper end of air outlet regulating valve is connected with the touch rod.

[0009] The utility model discloses a further setting for: still rotatory connection has two variable wheel groups in the pressure stabilizing tank, the variable wheel group includes the integral setting big wheel and small wheel, the gravity piston is connected with the big wheel of one variable wheel group through drawstring, and the small wheel on the variable wheel group connected with the gravity piston is connected with the big wheel on another variable wheel group through drawstring, and its small wheel is connected with the valve core of air intake regulating valve, to transfer the displacement of gravity valve core to the valve core.

[0010] The utility model discloses a further setting for: still install preheating coil pipe in the pressure stabilizing tank, the input of preheating coil pipe with the liquid outlet intercommunication of heat storage heat exchanger, the output of preheating coil pipe with the liquid inlet intercommunication of heat storage heat exchanger.

[0011] The utility model discloses a further setting for: install the air release valve on the gravity piston, and the air release opening is set up on the pressure stabilizing tank.

[0012] The utility model discloses a further setting for: install the air release valve on the gravity piston, and the air release opening is set up on the pressure stabilizing tank.

[0013] By utilizing the wind turbine to directly drive the compressor to work, wind energy can be converted into high-pressure gas for energy storage, and then the high-pressure gas is preheated by the pressure stabilizing preheating device, so that the output gas pressure is constant, and the constant pressure gas drives the expander to move, and then drives the main generator to generate electricity, further solving the problem of unstable power generation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure schematic diagram of the utility model is shown.

[0015] Figure 2 The structure schematic diagram of the pressure stabilizing preheating device is shown.

[0016] Reference numerals: 1, wind turbine; 11, speed changer; 12, magnetic speed controller; 2, compressor; 3, heat storage and heat exchanger; 4, high-pressure gas storage device; 5, pressure stabilizing and preheating device; 51, pressure stabilizing tank; 52, air inlet regulating valve; 53, air outlet regulating valve; 54, gravity piston; 541, air release valve; 55, pull rope; 56, variable wheel set; 57, preheating coil; 58, air release port; 6, expander; 7, main generator; 8, auxiliary generator; 9, battery. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0018] The present application provides a wind power direct compressed air energy storage and power generation system, which comprises a wind turbine 1, the wind turbine 1 is selected to be a vertical shaft and horizontally rotating type, and two magnetic speed controllers 12 are installed on the wind turbine 1 to control the rotating speed of the wind turbine 1.

[0019] The output end of the wind turbine 1 is drivingly connected with a speed changer 11, the output end of the speed changer 11 is drivingly connected with a compressor 2, so that the wind turbine 1 drives the compressor 2 to rotate through the speed changer 11, and the compressor 2 works.

[0020] The output end of the compressor 2 is communicated with a heat storage and heat exchanger 3, that is, the high-temperature and high-pressure gas generated by the work of the compressor 2 is transmitted into the heat storage and heat exchanger 3, the gas outlet of the heat storage and heat exchanger 3 is communicated with a high-pressure gas storage device 4, that is, the high-temperature and high-pressure gas is stored in the high-pressure gas storage device 4 after heat exchange in the heat storage and heat exchanger 3, and the high-pressure gas is stored in the high-pressure gas storage device 4.

[0021] The output end of the high-pressure gas storage device 4 is communicated with a pressure stabilizing and preheating device 5, the pressure stabilizing and preheating device 5 is used for stabilizing the pressure of the high-pressure gas, so that the gas pressure is constant, and the stable power generation is further maintained, and the power generation fluctuation caused by the unstable gas pressure is avoided. The output end of the pressure stabilizing and preheating device 5 is communicated with an expander 6, the output end of the expander 6 is communicated with a main generator 7, the constant pressure gas in the pressure stabilizing and preheating device 5 drives the main generator 7 to rotate through the expander 6, so that the main generator 7 works and generates power.

[0022] The output end of the wind turbine 1 is also drivingly connected with an auxiliary generator 8, the auxiliary generator 8 is also drivingly connected with the wind turbine 1 through the speed changer 11, the output end of the auxiliary generator 8 is electrically connected with the magnetic speed controller 12 and the heat storage and heat exchanger 3, so as to maintain the system control power consumption, and the output end of the auxiliary generator 8 is also electrically connected with a battery 9.

[0023] The pressure stabilizing preheating device 5 comprises a pressure stabilizing tank 51, in which an air inlet adjusting valve 52, an air outlet adjusting valve 53 and a gravity piston 54 are installed, the gravity piston 54 can seal sliding in the pressure stabilizing tank 51, the air inlet adjusting valve 52 and the air outlet adjusting valve 53 are both arranged below the gravity piston 54, the lower surface of the gravity piston 54 is connected with the lower end of the valve core of the air inlet adjusting valve 52 through a pull rope 55, and the upper end of the valve core of the air outlet adjusting valve 53 is fixedly connected with a touch rod.

[0024] When the high-pressure gas is filled into the pressure stabilizing tank 51 through the air inlet adjusting valve 52, the gravity piston 54 will rise, and then the pull rope 55 will gradually pull the valve core of the air inlet adjusting valve 52 to move downwards, that is, the valve core is gradually closed, when the gravity piston 54 rises to a certain height, the valve core will be completely pulled to close, and at this time, the high-pressure gas will gradually stabilize in the pressure stabilizing tank 51, and the gravity valve core will gradually descend under the gravity, and the constant-pressure gas will be squeezed out from the air outlet adjusting valve 53 in the descending process, until the gravity piston 54 abuts against the touch rod, and the valve core of the air outlet adjusting valve 53 is pressed to close.

[0025] The air inlet of the air inlet adjusting valve 52 is communicated with the high-pressure gas storage device 4, and the air outlet of the air outlet adjusting valve 53 is communicated with the expander 6.

[0026] It should be noted that the air inlet end of the air inlet adjusting valve 52 is provided with a one-way valve to avoid gas backflow, and the air outlet adjusting valve 53 needs to close the valve core when the pressure stabilizing tank 51 is filled with gas.

[0027] The pressure stabilizing tank 51 is further rotationally connected with two variable wheel sets 56, the variable wheel set 56 comprises a large wheel and a small wheel which are integrally arranged and synchronously rotate, the lower surface of the gravity piston 54 is connected with the large wheel of one of the variable wheel sets 56 through the pull rope 55, that is, the rotation of the large wheel can adjust the length of the pull rope 55, and then the gravity piston 54 can move up and down. The small wheel of the variable wheel set 56 connected with the gravity piston 54 is connected with the large wheel of the other variable wheel set 56 through the pull rope 55, and the small wheel is connected with the lower end of the valve core of the air inlet adjusting valve 52, that is, the gravity piston 54 can drive the valve core of the air inlet adjusting valve 52 to move, but the displacement of the gravity piston 54 is greater than that of the valve core, that is, the gravity piston 54 will not be closed by pulling the valve core for a small distance.

[0028] The bottom of the pressure stabilizing tank is further provided with a preheating coil pipe 57, the input end of the preheating coil pipe 57 is communicated with the liquid outlet of the heat storage heat exchanger 3, that is, the heat stored in the heat storage heat exchanger 3 can be replaced into the heat exchange agent, and the heat exchange agent can bring the heat into the pressure stabilizing tank 51. The output end of the preheating coil pipe 57 is communicated with the liquid inlet of the heat storage heat exchanger 3 to realize the circulation of the heat exchange agent, that is, the constant-pressure gas in the pressure stabilizing tank 51 is heated by the heat stored in the heat storage heat exchanger 3 to improve the power generation efficiency, avoid the low conversion efficiency of cold gas and cause frost on the main generator 7.

[0029] The air release valve 541 is further arranged on the gravity piston 54 and communicates the cavities on both sides of the gravity piston 54, and the top end of the pressure stabilizing tank 51 is further provided with an air release port 58, so that when high-pressure gas is filled into the pressure stabilizing tank 51, the high-pressure gas can push the gravity piston 54 upward, at this time, the gravity piston 54 cannot descend under the action of the high-pressure gas, only when the pressure in the pressure stabilizing tank 51 is kept constant by gradually releasing pressure through the air release valve 541, the gravity piston 54 can gradually descend.

[0030] It should be noted that the air release valve 541 does not always release pressure, that is, it only releases pressure when the pressure in the pressure stabilizing tank 51 is higher than the constant pressure standard.

[0031] In summary, the utility model discloses a wind turbine 1 directly drives the compressor 2 to work, can realize the energy storage of wind energy into high-pressure gas, then by high-pressure gas utilizes the pressure stabilizing preheating device 5 and carries out pressure stabilizing preheating, makes the gas pressure of output constant, then by the gas of constant pressure drives the expander 6 and moves, and then drives the main generator 7 and carries out power generation, further solves the problem of unstable power generation, simultaneously, since the storage of high-pressure gas can be realized, and then the problem of delay power generation can be realized, since the power generation is stable and the high-pressure gas storage equipment 4, the abandoned wind phenomenon and the lost wind phenomenon can be better avoided, the wind energy conversion rate is higher, and the degree of electricity cost is lower.

[0032] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made to it and equivalent parts can be substituted for the parts thereof without departing from the scope of the utility model, and in particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

[0033] In the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In addition, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the term "mount", "link", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected; can be mechanical connection, also can be electrical connection; can be directly connected, also can pass through the indirect connection of intermediate medium, can be two element internal communication. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0035] The term "comprising" or any other similar word is intended to encompass a non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements is not limited to those elements, but can include other elements not expressly listed, or also include elements inherent in the process, article, or apparatus / device.

[0036] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, the person skilled in the art can make equivalent changes or replacements to the related technical features, and the technical schemes after these changes or replacements will fall within the protection scope of the utility model.

Claims

1. A wind-powered direct compressed air energy storage and power generation system, characterized in that: The system includes a wind turbine (1), the output end of which is connected to a compressor (2) via a speed reducer (11) to drive the compressor (2) to work. The output end of the compressor (2) is connected to a heat storage heat exchanger (3), the outlet of which is connected to a high-pressure gas storage device (4), the output end of which is connected to a pressure stabilizing preheating device (5), the output end of which is connected to an expander (6), and the output end of which is connected to a main generator (7). The pressure stabilizing and preheating device (5) includes a pressure stabilizing tank (51), an inlet regulating valve (52), an outlet regulating valve (53), and a gravity piston (54) installed in the pressure stabilizing tank (51). The inlet regulating valve (52) and the outlet regulating valve (53) are located below the gravity piston (54). The lower part of the gravity piston (54) is connected to the valve core of the inlet regulating valve (52) by a pull rope (55). A contact rod is connected to the upper end of the valve core of the outlet regulating valve (53).

2. The wind-powered direct compressed air energy storage and power generation system according to claim 1, characterized in that: The wind turbine (1) is equipped with a magnetic speed controller (12).

3. The wind-powered direct compressed air energy storage and power generation system according to claim 2, characterized in that: The output end of the wind turbine (1) is also connected to an auxiliary generator (8). The output end of the auxiliary generator (8) is electrically connected to the magnetic speed controller (12) and the heat storage heat exchanger (3). The output end of the auxiliary generator (8) is also electrically connected to a battery (9).

4. The wind-powered direct compressed air energy storage and power generation system according to claim 1, characterized in that: The pressure stabilizing tank (51) is also rotatably connected to two variable wheel sets (56). Each variable wheel set (56) includes a large wheel and a small wheel that are integrally set. The gravity piston (54) is connected to the large wheel of one of the variable wheel sets (56) by a pull rope (55). The small wheel on the variable wheel set (56) connected to the gravity piston (54) is connected to the large wheel on the other variable wheel set (56) by a pull rope (55). The small wheel is connected to the valve core of the intake regulating valve (52) to transmit the displacement of the gravity valve core to the valve core.

5. The wind-powered direct compressed air energy storage and power generation system according to claim 1, characterized in that: The pressure stabilizing tank (51) is also equipped with a preheating coil (57). The input end of the preheating coil (57) is connected to the liquid outlet of the heat storage heat exchanger (3), and the output end of the preheating coil (57) is connected to the liquid inlet of the heat storage heat exchanger (3).

6. The wind-powered direct compressed air energy storage and power generation system according to claim 1, characterized in that: The gravity piston (54) is equipped with a vent valve (541), and the pressure stabilizing tank (51) is provided with a vent port (58).

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