Energy storage type air compression station

Abstract

The utility model discloses an energy storage type air compression station which comprises a power grid power supply module, an energy storage electric box, an air compression module, an electric control module and an automatic control module, the air compression module comprises an air compressor, and the power receiving input end of the air compressor is electrically connected with the electric control module; the electric control module comprises a first main power supply line, a second main power supply line and a third main power supply line, the power receiving input ends of the first main power supply line and the second main power supply line are directly connected with the power grid power supply module, and the power output ends of the first main power supply line and the second main power supply line are electrically connected with the third main power supply line. A first electric control switch, an energy storage electric box and a second electric control switch are sequentially arranged on the first main power supply line, and a third electric control switch is arranged on the second main power supply line; the electric output end of the third main power supply line is connected with more than two branch power supply lines; and each branch power supply line is provided with a fourth electric control switch. Through the improvement, potential safety hazards and energy loss caused when the energy storage electricity returns to the power grid are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated application of compressed air preparation and electrochemical energy storage technology, and specifically refers to an energy storage type air compressor station. Background Art

[0002] An air compressor is a machine that compresses air into high-pressure gas. It compresses a large amount of air into a closed space to increase the pressure and density of the air, so that the air can be stored and used more efficiently. The working principle of an air compressor is to compress the air into a high-pressure state through a compressor, and then store the high-pressure gas in a gas tank. When the compressed air is needed, the compressor will release the gas in the gas tank and transport it to the place where it is needed through a pipeline.

[0003] In order to efficiently utilize electricity and reduce electricity costs, an optimized power supply strategy will be adopted. During peak electricity demand periods (i.e., peak power phases), the air compressor is mainly powered by energy storage boxes to reduce the load on the power grid. During low electricity demand periods (i.e., valley power phases), the air compressor is powered by the power grid, and the energy storage boxes are charged during this low electricity price period for use during the peak power phase.

[0004] In the prior art, a single air compressor is connected to an energy storage box for power supply. However, once the air compressor fails or stops running, the remaining power in the energy storage box needs to be returned to the power grid. This grid connection process is often accompanied by a transition phase, and the impact current generated will cause voltage fluctuations in the power grid, which not only affects the stable operation of other electrical equipment, but may also cause safety hazards to the entire power grid. In addition, due to factors such as internal resistance and chemical reaction efficiency, the energy storage device cannot achieve complete energy conversion efficiency during the charge and discharge cycle, resulting in energy loss during the storage and release of electrical energy. Utility Model Content

[0005] In order to solve at least one of the above technical problems, the utility model provides an energy storage type air compressor station, including a power supply module of a power grid, an energy storage box, an air compressor air-filling module, an electric control module and an automatic control module; the air compressor air-filling module includes an air compressor, and the power input end of the air compressor is electrically connected to the electric control module;

[0006] The electric control module includes a first main power supply line, a second main power supply line and a third main power supply line. The power input ends of the first main power supply line and the second main power supply line are electrically connected to the power grid power supply module respectively, and the power output ends of the first main power supply line and the second main power supply line are electrically connected to the third main power supply line. The first main power supply line is provided with a first electric control switch, an energy storage box and a second electric control switch in sequence, and the second main power supply line is provided with a third electric control switch; the first main power supply line and the second main power supply line are arranged in parallel; the automatic control module transmits a switch control signal to the electric control module;

[0007] The electrical output end of the third main power supply line is connected to two or more branch power supply lines;

[0008] Each of the branch power lines is provided with a fourth electric control switch, and the ends of the branch power lines are electrically connected to the air compressors respectively, and the branch power lines are arranged in parallel.

[0009] As an improved solution, the air compression degassing module includes an air compressor, a dryer and a compressed air storage tank connected in sequence through pipelines. The air outlet end of the compressed air storage tank is connected to an air outlet pipeline, and the end of the air outlet pipeline is used to connect to the user end.

[0010] As an improved solution, in the first power supply mode of the air compressor, the second electronically controlled switch is turned on and the first electronically controlled switch is turned off.

[0011] As an improved solution, in the second power supply mode of the air compressor, the third electronically controlled switch is turned on, the first electronically controlled switch is turned off, and the second electronically controlled switch is turned off.

[0012] As an improved solution, in the third power supply mode of the air compressor, the third electronically controlled switch is turned on, the first electronically controlled switch is turned on, and the second electronically controlled switch is turned off.

[0013] As an improved solution, the self-control module is electrically connected to the first, second, third and fourth electronically controlled switches to control the on and off of the first, second, third and fourth electronically controlled switches.

[0014] As an improved solution, the automatic control module is a PLC controller or a DDC controller, and the signal output end of the automatic control module is connected to the electric control module by wire.

[0015] As an improved solution, the energy storage box, the electric control module and the automatic control module are of an integrated cabinet type, a split cabinet type or an integral skid-mounted structure.

[0016] The utility model has the beneficial effects:

[0017] More than two branch power lines are connected through the electrical output end of the third main power supply line, each of the branch power lines is provided with a fourth electronically controlled switch, and the ends of the branch power lines are respectively electrically connected to the air compressors. The technical improvement and optimization of the parallel arrangement of the branch power lines not only effectively avoids the safety hazards and energy loss caused by the return of stored energy to the power grid, but also significantly improves the energy utilization efficiency and the safety of the operation of the air compressor station system.

[0018] Specifically, by setting the control of the switch by the automatic control module, the air compressor station can preferentially use the stored electricity of the energy storage box when it is working normally, and when the electricity of the energy storage box is almost consumed, the power supply from the energy storage box is switched to the mains power supply of the power grid power supply module through the electric control module and the automatic control module. Furthermore, when the power grid occasionally fails, the energy storage box can also be used as a backup power supply for the air compressor station. Furthermore, it can also achieve the benefit of cost saving by switching during peak and valley power periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the energy storage air compressor station of the utility model;

[0020] Figure 2 It is a schematic diagram of the control module structure of the energy storage type air compressor station of the utility model.

[0021] The accompanying drawings are marked as follows: 1. grid power supply module; 201. first main power supply line; 202. second main power supply line; 203. third main power supply line; 204. branch power supply line; 3. energy storage box; 401. first electric control switch; 402. second electric control switch; 403. third electric control switch; 404. fourth electric control switch; 5. air compressor; 6. dryer; 7. compressed air storage tank; 8. user end; 100. air compressor degassing module; 200. electric control module; 300. automatic control module. DETAILED DESCRIPTION

[0022] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. The "first" and "second" involved in the present invention do not represent specific quantities and sequences, but are merely used to distinguish names.

[0024] Part I. Structural Layout of the Device

[0025] The specific structure of an energy storage air compressor station is as follows: Figure 1 As shown, it includes a grid power supply module 1, an energy storage box 3, an air pressure gas module 100, an electric control module 200 and an automatic control module 300.

[0026] The air compression and degassing module 100 includes an air compressor 5, wherein the power input end of the air compressor 5 is electrically connected to the electronic control module. Specifically, the air compression and degassing module 100 includes an air compressor 5, a dryer 6 and a compressed air storage tank 7 connected in sequence through pipelines, and the air outlet end of the compressed air storage tank 7 is connected to an air outlet pipeline, and the end of the air outlet pipeline is used to be connected to the user end 8.

[0027] The electric control module 200 includes a first main power supply line 201, a second main power supply line 202 and a third main power supply line 203. The power input ends of the first main power supply line 201 and the second main power supply line 202 are electrically connected to the power grid power supply module 1 respectively, and the power output ends of the first main power supply line 201 and the second main power supply line 202 are electrically connected to the third main power supply line 203. The first main power supply line 201 and the second main power supply line 202 are arranged in parallel. The first main power supply line 201 is provided with a first electric control switch 401, an energy storage box 3 and a second electric control switch 402 in sequence, and the second main power supply line 202 is provided with a third electric control switch 403. The first main power supply line 201 and the second main power supply line 202 are arranged in parallel; the automatic control module 300 transmits a switch control signal to the electric control module 200, which is used to realize the mutual switching of power supply between the energy storage box 3 and the power grid power supply module 1, and control the charging of the energy storage box 3;

[0028] The electrical output end of the third main power supply line 203 is connected to two or more branch power supply lines 204. For example, in this embodiment, four branch power supply lines 204 are provided, each branch power supply line 204 is provided with a fourth electric control switch 404, and the ends of the branch power supply lines are respectively electrically connected to the air compressors, each branch power supply line 204 is connected to an air compressor, and more than two branch power supply lines 204 are arranged in parallel. There may also be two, three or more than four branch power supply lines.

[0029] As several optional solutions, the electric control module 200 and the automatic control module 300 are of an integrated, split or skid-mounted structure.

[0030] Here, three air compressor power supply modes are proposed, namely:

[0031] In the first power supply mode, the second electronically controlled switch 402 is turned on, and the first electronically controlled switch 401 is turned off.

[0032] In the second power supply mode, the third electric-controlled switch 403 is turned on, the first electric-controlled switch 401 is turned off, and the second electric-controlled switch 402 is turned off.

[0033] In the third power supply mode, the third electric-controlled switch 403 is turned on, the first electric-controlled switch 401 is turned on, and the second electric-controlled switch 402 is turned off.

[0034] The automatic control module 300 is a PLC controller or a DDC controller, and the signal output end of the automatic control module 300 is connected to the electric control module 200 by wired means for controlling the electric control switch. That is, the automatic control module 300 is connected to the first electric control switch 401, the second electric control switch 402 and the third electric control switch 403 by electric signals to control the conduction and disconnection of the first electric control switch 401, the second electric control switch 402 and the third electric control switch 403. At the same time, the automatic control module 300 is also connected to the fourth electric control switch 404 by electric signals to control the conduction and disconnection of the fourth electric control switch 401.

[0035] The switch in the electric control module is controlled by the automatic control module to switch to the mains power of the grid power supply module. In theory, disturbance-free switching can be achieved.

[0036] PLC, the full name of which is Programmable Logic Controller, is a digital operation electronic system designed specifically for use in industrial environments. It uses a programmable memory to store instructions for performing logical operations, sequential control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input and output.

[0037] DDC, the full name is Direct Digital Controller, and its Chinese name is direct digital controller. It is a new type of direct digital controller that integrates computer technology, automatic control technology, and communication technology. Due to its flexible structure, the controller can form various independent control systems and realize various combinations. It is the main equipment for realizing industrial automation.

[0038] Part 2. Device Operation Method Description

[0039] After pre-treatment and filtration, the air enters the air compressor 5 for gas compression. In the air compressor 5, the air is first sucked into the compression chamber through the air inlet. For example, in a centrifugal air compressor, the high-speed rotating impeller will generate a strong centrifugal force, pushing the air to the diffuser, causing the gas volume to gradually decrease and the pressure to gradually increase. This process continues until the gas reaches a predetermined pressure value. Subsequently, the high-pressure air is transported through the exhaust pipe, and the obtained compressed air is dried by the dryer 6 to remove moisture from the compressed air. The dried compressed air flows into the compressed air storage tank 7 through the pipeline for caching. After caching, the compressed air will be supplied to the user end as finished gas.

[0040] During the off-peak period, the second main power supply line 202 is connected to the grid power supply module 1. At this time, the first electric control switch 401, the third electric control switch 403, and the fourth electric control switch 404 are all in a closed state, while the second electric control switch 402 is disconnected, that is, the third power supply mode mentioned above;

[0041] After the first main power supply line 201 is connected to the power supply, the energy storage box 3 starts to charge and store energy. At the same time, the third main power supply line 203 is connected to the power supply, and two or more branch power supply lines 204 are used to provide power to the corresponding air compressors 5 to ensure their normal operation. This not only makes full use of the valley power, but also realizes the effective storage and distribution of energy, thereby improving the operating efficiency of the system.

[0042] During the mains power period, the first electric switch 401 and the third electric switch 403 are in the open state, while the second electric switch 402 and the fourth electric switch 404 remain closed and on. At this time, the system will give priority to using the energy storage box 9 for power supply, i.e., the first power supply mode mentioned above. Through the above-mentioned precise management and efficient use of electric energy, the air compressor station can give priority to using the valley power with lower cost during the mains power supply period, thereby reducing the mains power consumption and improving production efficiency.

[0043] The existence of the second power supply mode is not excluded. For example, when the energy storage box 3 fails, is under maintenance or is deactivated, the first electric control switch and the second electric control switch are disconnected at the same time without affecting the operation of the air compressor station.

[0044] The fourth electric control switch 404 can be flexibly and remotely controlled by the automatic control module 300 according to the user's real-time gas demand and the operating status of the air compressor 5 to ensure the accurate matching and efficient operation of the gas supply system. For example, when a single air compressor 5 in the air compressor station (air compressor gas module 100) encounters a failure or needs to be shut down for a long time, the corresponding fourth electric control switch 404 is promptly disconnected by the automatic control module 300, so as not to affect the normal operation of other air compressors. Compared with the connection mode of a single air compressor 5 and an energy storage box in traditional technology, this air compressor station ensures that the electricity in the energy storage box 3 can be continuously and effectively utilized, without returning the surplus electric energy to the grid power supply module 1, thereby avoiding the potential safety hazards and energy loss in the process of returning electric energy, and improving the utilization rate of valley electricity by the air compressor station.

Claims

1. An energy storage air compressor station, characterized in that: It includes power supply module, energy storage box, air compressor module, electric control module and automatic control module; The air compression module includes an air compressor, and the power input end of the air compressor is electrically connected to the electronic control module; The electric control module includes a first main power supply line, a second main power supply line and a third main power supply line. The power input ends of the first main power supply line and the second main power supply line are electrically connected to the power grid power supply module respectively, and the power output ends of the first main power supply line and the second main power supply line are electrically connected to the third main power supply line. The first main power supply line is provided with a first electric control switch, an energy storage box and a second electric control switch in sequence, and the second main power supply line is provided with a third electric control switch; the first main power supply line and the second main power supply line are arranged in parallel; the automatic control module transmits a switch control signal to the electric control module; The electrical output end of the third main power supply line is connected to two or more branch power supply lines; Each of the branch power lines is provided with a fourth electric control switch, and the ends of the branch power lines are electrically connected to the air compressors respectively, and the branch power lines are arranged in parallel.

2. The energy storage type air compressor station according to claim 1, characterized in that: The air compression and degassing module comprises an air compressor, a dryer and a compressed air storage tank which are sequentially connected through pipelines. The air outlet end of the compressed air storage tank is connected to an air outlet pipeline, and the end of the air outlet pipeline is used to be connected to a user end.

3. The energy storage type air compressor station according to claim 1, characterized in that: In the first power supply mode of the air compressor, the first electronically controlled switch is disconnected, the second electronically controlled switch is turned on, and the third electronically controlled switch is disconnected.

4. The energy storage type air compressor station according to claim 1, characterized in that: In the second power supply mode of the air compressor, the third electronically controlled switch is turned on, the first electronically controlled switch is turned off, and the second electronically controlled switch is turned off.

5. The energy storage type air compressor station according to claim 1, characterized in that: In the third power supply mode of the air compressor, the third electronically controlled switch is turned on, the first electronically controlled switch is turned on, and the second electronically controlled switch is turned off.

6. The energy storage type air compressor station according to claim 1, characterized in that: The self-control module is connected to the first electric control switch, the second electric control switch, the third electric control switch and the fourth electric control switch by electrical signals to control the on and off of the first electric control switch, the second electric control switch, the third electric control switch and the fourth electric control switch.

7. The energy storage type air compressor station according to claim 1, characterized in that: The automatic control module is a PLC controller or a DDC controller, and the signal output end of the automatic control module is connected to the electric control module by wire.

8. The energy storage air compressor station according to claim 1, characterized in that: The energy storage box, electric control module and automatic control module are of integrated cabinet type, split cabinet type or overall skid-mounted structure.

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