A water, electricity and gas co-generation power system

Abstract

The present invention discloses a water-electricity-gas symbiotic power generation system, which includes a wave energy generator, a high-pressure air energy storage device, a shore-based local off-grid device, and an air kinetic energy generator. The high-pressure air energy storage device includes a static high-pressure air energy storage device and a dynamic high-pressure air balance energy storage device. The wave energy generator directly generates electricity using wave energy, transmits the electric energy to the shore-based local off-grid device, and uses electro-mechanical energy to store high-pressure air through the dynamic high-pressure air balance energy storage device. The dynamic high-pressure air balance energy storage device transmits air kinetic energy to the air kinetic energy generator. The static high-pressure air energy storage device directly stores high-pressure air using wave energy and transmits air kinetic energy to the air kinetic energy generator. The air kinetic energy generator generates electricity using air kinetic energy and transmits the electric energy to the shore-based local off-grid device. The present invention uses wave energy as the kinetic energy source, and realizes air kinetic energy power generation and static and dynamic high-pressure air energy storage in direct or indirect forms to achieve peak shaving and valley filling energy compensation.

Description

Technical Field

[0001] The present invention relates to the field of new energy technologies, and particularly to a water-electricity-gas co-generation system. Background Art

[0002] Currently, green energy generation mainly includes wind energy, photovoltaic energy, tidal energy, and geothermal energy, etc., and energy storage mainly includes water energy storage, electrochemical energy storage, and flywheel energy storage, etc. Especially in the field of energy storage, all are energy storage technologies involving heat engines or chemical substances. In addition to the high levelized cost of energy (LCOE), more importantly, the participation of electricity generation technology undoubtedly accompanies a reduction in energy efficiency.

[0003] Therefore, technicians in this field are committed to developing a water-electricity-gas co-generation system, which uses the inexhaustible wave energy as the driving energy source, directly or indirectly realizes pneumatic energy generation and static and dynamic high-pressure air energy storage to achieve peak shaving and valley filling energy compensation, and effectively realizes the virtual capacity increase of the local distribution network system. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to use wave energy as the driving energy source, directly or indirectly realize pneumatic energy generation and static and dynamic high-pressure air energy storage to achieve peak shaving and valley filling energy compensation, and effectively realize the virtual capacity increase of the local distribution network system.

[0005] To achieve the above object, the present invention provides a water-electricity-gas co-generation system, including a wave energy generator, a high-pressure air energy storage device, a shore-based local off-grid device, and a pneumatic energy generator. The high-pressure air energy storage device includes a static high-pressure air energy storage device and a dynamic high-pressure air balance energy storage device; the wave energy generator is configured to directly generate electricity using wave energy, transmit the electric energy to the shore-based local off-grid device, and use the electro-mechanical energy to store high-pressure air through the dynamic high-pressure air balance energy storage device; the dynamic high-pressure air balance energy storage device is configured to transmit pneumatic energy to the pneumatic energy generator; the static high-pressure air energy storage device is configured to directly store high-pressure air using wave energy and transmit pneumatic energy to the pneumatic energy generator; the pneumatic energy generator generates electricity using pneumatic energy and transmits the electric energy to the shore-based local off-grid device.

[0006] Furthermore, the weak electro-mechanical motor device is driven by the pneumatic energy transmitted by the static high-pressure air energy storage device, and the weak electro-mechanical motor device includes at least one of a pneumatic fan and a pneumatic door.

[0007] Further, each of the static high-pressure air energy storage device and the dynamic high-pressure air balance energy storage device includes a plurality of bidirectional air-inflating and air-extracting single-flow pressure cylinder tanks, a plurality of buffer tanks, a deep drying device, an air compression device, and a high-pressure air energy storage tank. The plurality of bidirectional air-inflating and air-extracting single-flow pressure cylinder tanks and the plurality of buffer tanks adopt a cascaded structure and are connected to the deep drying device through a conveying pipeline. The deep drying device is connected to the high-pressure air energy storage tank through a conveying pipeline. The high-pressure air energy storage tank is configured to deliver pneumatic energy to the pneumatic energy generator.

[0008] Further, the number of the plurality of bidirectional air-inflating and air-extracting single-flow pressure cylinder tanks is one more than the number of the plurality of buffer tanks. Two adjacent ones of the plurality of bidirectional air-inflating and air-extracting single-flow pressure cylinder tanks are connected through one of the plurality of buffer tanks. Each buffer tank is connected to the deep drying device through a conveying pipeline by converging.

[0009] Further, the high-pressure air energy storage tank includes a plurality of tank elements connected in parallel.

[0010] Further, the wave energy generator is configured to use electro-generated kinetic energy to deliver pneumatic energy to the deep drying device of the dynamic high-pressure air balance energy storage device.

[0011] Further, each of the plurality of bidirectional air-inflating and air-extracting single-flow pressure cylinder tanks includes an outer cylinder wall, an air suction and extraction pipe, a mechanical pull rod, a sealing device, and a floating body. The outer cylinder wall forms an inner cavity. The number of the air suction and extraction pipes is two, which are arranged in the outer cylinder wall. Both ends of each air suction and extraction pipe communicate with both ends of the inner cavity through an air inlet linkage valve and an air extraction port linkage valve respectively. The sealing device is arranged in the inner cavity and is slidably connected to the outer cylinder wall, dividing the inner cavity into two non-communicating parts. The floating body is arranged outside the outer cylinder wall and is connected to the sealing device through the mechanical pull rod. The mechanical connecting rod is slidably connected to the outer cylinder wall. The floating body is configured to drive the mechanical pull rod to reciprocate.

[0012] Further, the air inlet linkage valve and the corresponding air extraction port linkage valve are set to be state-interlocked.

[0013] Further, two adjacent ones of the plurality of bidirectional air-inflating and air-extracting single-flow pressure cylinder tanks and one of the plurality of buffer tanks are connected through the air suction and extraction pipe via a conveying pipeline.

[0014] Further, the floating body is configured to drive the mechanical pull rod to reciprocate by using wave energy, or receive the mechanical pull rod driven by the wave energy generator using electro-generated mechanical energy to reciprocate.

[0015] The beneficial effects of the present invention are that during the endogenous cycle, the energy flow loss in the heat engine conversion is greatly reduced, and the endogenous balance of peak-valley power consumption is achieved. Under the control of the optimization strategy of the intelligent energy management system, relying on the clean wave energy, the onshore local off-grid system can basically realize the local sourcing of energy.

[0016] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the drawings to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the system structure of a preferred embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the system structure of a high-pressure air energy storage device of a preferred embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the structure of a two-way inflatable and exhaust single-flow pressure cylinder tank of a preferred embodiment of the present invention.

[0020] Among them, 2 - two-way inflatable and exhaust single-flow pressure cylinder tank, 3 - buffer tank, 4 - conveying pipeline, 11 - wave energy, 12 - wave energy generator, 13 - static high-pressure air energy storage device, 14 - dynamic high-pressure air balance energy storage device, 15 - onshore local off-grid device, 16 - pneumatic energy generator, 17 - weak current motor device, 21 - sealing device, 22 - outer cylinder wall, 23 - linkage valve, 24 - suction and exhaust pipe, 25 - inner cavity, 26 - floating body, 27 - mechanical pull rod, 51 - deep drying device, 52 - air compression device, 53 - high-pressure air energy storage tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following introduces multiple preferred embodiments of the present invention with reference to the accompanying drawings of the specification to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0022] In the drawings, components with the same structure are denoted by the same numerical labels, and components with similar structures or functions everywhere are denoted by similar numerical labels. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. To make the illustration clearer, the thickness of some parts in the drawings is appropriately exaggerated.

[0023] This embodiment relates to a comprehensive multi-energy complementary power generation system in the field of new energy, especially referring to the peak shaving and valley filling, virtual capacity increase power generation of wave high-pressure air energy storage and pneumatic power generation devices, and relying on the intelligent energy management system to achieve lossless and efficient conversion of green energy.

[0024] As Figure 1 shown, this embodiment provides a water, electricity, and gas co-generation system, including a wave energy generator 12, a high-pressure air energy storage device, a shore-based local off-grid device 15, a pneumatic energy generator 16, and a weak electricity generating motor device 17.

[0025] The high-pressure air energy storage device includes a static high-pressure air energy storage device 13 and a dynamic high-pressure air balance energy storage device 14.

[0026] The static high-pressure air energy storage device 13 drives the pneumatic energy generator 16 to generate electricity, or provides pneumatic energy for the weak electricity generating motor device 17. The kinetic energy for power generation of the pneumatic energy generator 16 also comes from the dynamic high-pressure air balance energy storage device 14.

[0027] The static high-pressure air energy storage device 13 provides pneumatic energy for shore-based local off-grid users to drive the weak electricity generating motor device 17, such as mechanical devices like pneumatic fans and pneumatic doors, which can reduce the mechanical energy loss link.

[0028] As Figure 2 shown, the high-pressure air energy storage device is composed of a two-way inflatable and extractable single-flow pressure cylinder tank 2, a buffer tank 3, a deep drying device 51, an air compression device 52, a high-pressure air energy storage tank 53, and a conveying pipeline 4. Among them, the two-way inflatable and extractable single-flow pressure cylinder tank 2 is composed of an outer cylinder wall 22, an inner cavity 25, a linkage valve 23, a suction and extraction pipe 24, a mechanical pull rod 27, a sealing device 21, and a floating body 26 (as Figure 3 shown). The air input by the deep drying device 51 is drawn from the electro-generated energy of the wave energy generator 12 and the buffer tank 3. The gas in the high-pressure air energy storage tank 53 is used by the pneumatic energy generator 16, and the weak electricity generating motor device 17 is driven by the cascade conversion of the high-pressure air energy storage tank 53.

[0029] When in use, as Figure 1 , Figure 2 and Figure 3 shown, the static high-pressure air energy storage device 13 directly uses wave energy 11 to push the mechanical pull rod 27 for high-pressure air energy storage. The wave energy 11 pushes the mechanical pull rod 27 in the two-way inflatable and extractable single-flow primary pressure cylinder tank 2. The two-way inflatable and extractable single-flow pressure cylinder tank 2 and the buffer tank 3 are in a cascade structure. The air inlet and the extraction port linkage valve 23 of the two-way inflatable and extractable single-flow pressure cylinder tank 2 are interlocked. The dynamic high-pressure air balance energy storage device 14 performs high-pressure air balance energy storage on the electro-generated mechanical energy of the excess electrical energy of the wave energy generator 12, and its charging and extraction principle is the same as that of the static high-pressure air energy storage device 13.

[0030] In some embodiments, the optimization strategy control of the intelligent energy management system of the water-electricity-gas co-generation system is to directly generate electricity by the ocean wave energy generator 12 during the peak energy consumption period to supply power to the onshore local off-grid equipment 15, and perform dynamic high-pressure air balance energy storage through electro-mechanical energy to achieve the balance of the power grid system. During the low energy consumption period, the static high-pressure air energy storage device 13 stores gas, and during the peak energy consumption period, the gas kinetic energy generator 16 is used for smooth peak shaving.

[0031] In some embodiments, the water-electricity-gas co-generation system converts the ocean wave energy output driven by the floating body 26 cluster and the mechanical pull rod 27, as well as the wave peak and valley and frequency prediction. Relying on the prediction results, the energy storage and the threshold adjustment of ocean wave power generation are linked to achieve active power balance and reactive power governance, and the flexible load is adjusted in real time in a hierarchical manner and the rigid load is optimized for production scheduling.

[0032] In some embodiments, the spatio-temporal domain artificial intelligence analysis of the intelligent energy management system of the water-electricity-gas co-generation system is realized by the Particle Swarm Optimization (PSO) algorithm for short-term prediction, and is iteratively optimized by autonomous learning in the real-time and historical databases to meet the onshore local off-grid economic dispatch and energy consumption decision-making.

[0033] In some embodiments, the comprehensive multi-energy complementary multi-objective prediction of the water-electricity-gas co-generation system mines data in the multi-dimensional historical database, and uses the self-learning algorithm to realize the load trend prediction. Among them, the short-term prediction of the real-time online electric load and the long-term prediction of the heating and cooling loads take into account the fluctuations of the cooling, heating and power loads and overall coordinate the output of the machine group to implement the collaborative optimization control of the source-network-load-storage, so as to achieve the balance between the source and load and the stability of the system.

[0034] The present invention is based on ocean wave energy, and combines static high-pressure air energy storage, dynamic high-pressure air balance energy storage, ocean wave energy generators, and gas kinetic energy generators to realize the onshore local off-grid user energy internal circulation. Based on the intelligent source-load prediction, the onshore local off-grid economic dispatch and energy consumption decision-making are realized. Through the direct and indirect comprehensive utilization of ocean wave energy, the perfect coordination of peak and valley electricity consumption of onshore local off-grid users is realized, and the multi-energy complementarity of the weak current electro-motor device and electricity consumption is realized. Basically, the virtual capacity increase of off-grid operation or grid-connected incremental energy consumption of onshore local off-grid users can be realized, meeting zero-carbon or even negative-carbon internal circulation energy consumption.

[0035] The superiority of the solution of the present invention lies in that the energy flow loss of the heat engine conversion is greatly reduced during the internal circulation process, and under the optimization strategy control of the intelligent energy management system, the system power control, peak and frequency scheduling, and user-side demand response are realized.

[0036] The present invention has a wide range of application prospects and is suitable for onshore local off-grid users, providing a new green energy power solution.

[0037] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field according to the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A water, electricity and gas co-generation power system, characterized in that, It includes a wave energy generator, a high-pressure air energy storage device, a shore-based local off-grid device, an air kinetic energy generator, and a weak current generating motor device. The high-pressure air energy storage device includes a static high-pressure air energy storage device and a dynamic high-pressure air balance energy storage device. The wave energy generator is configured to directly generate electricity using wave energy, transmit the electric energy to the shore-based local off-grid device, and perform high-pressure air energy storage through the dynamic high-pressure air balance energy storage device using electro-mechanical energy. The dynamic high-pressure air balance energy storage device is configured to transmit air kinetic energy to the air kinetic energy generator. The static high-pressure air energy storage device is configured to directly perform high-pressure air energy storage using wave energy and transmit air kinetic energy to the air kinetic energy generator. The air kinetic energy generator generates electricity using air kinetic energy and transmits the electric energy to the shore-based local off-grid device. The weak current generating motor device is driven by the air kinetic energy transmitted by the static high-pressure air energy storage device, and the weak current generating motor device includes at least one of a pneumatic fan and a pneumatic door. Each of the static high-pressure air energy storage device and the dynamic high-pressure air balance energy storage device includes a plurality of two-way inflatable and exhaust single-flow pressure cylinder tanks, a plurality of buffer tanks, a deep drying device, an air compression device, and a high-pressure air energy storage tank. The plurality of two-way inflatable and exhaust single-flow pressure cylinder tanks and the plurality of buffer tanks adopt a cascaded structure and are connected to the deep drying device through a conveying pipeline. The deep drying device is connected to the high-pressure air energy storage tank through a conveying pipeline. The high-pressure air energy storage tank is configured to transmit air kinetic energy to the air kinetic energy generator.

2. The water, electricity, and gas co-generation power system according to claim 1, characterized in that, The number of the plurality of two-way inflatable and exhaust single-flow pressure cylinder tanks is one more than the number of the plurality of buffer tanks. Two adjacent ones of the plurality of two-way inflatable and exhaust single-flow pressure cylinder tanks are connected through one of the plurality of buffer tanks, and each buffer tank is connected to the deep drying device through a conveying pipeline by way of confluence.

3. The water-electricity-gas cogeneration power generation system according to claim 1, characterized in that, The high-pressure air energy storage tank includes a plurality of tank elements connected in parallel.

4. The water-electricity-gas symbiotic power generation system according to claim 1, characterized in that The wave energy generator is configured to transmit air kinetic energy to the deep drying device of the dynamic high-pressure air balance energy storage device using electro-generated air energy.

5. The water, electricity and gas co-generation power system according to claim 1, characterized in that Each of the plurality of two-way inflatable and exhaust single-flow pressure cylinder tanks includes an outer cylinder wall, an intake and exhaust pipe, a mechanical pull rod, a sealing device, and a floating body. The outer cylinder wall forms an inner cavity. The number of the intake and exhaust pipes is two, which are arranged in the outer cylinder wall. Both ends of each intake and exhaust pipe are respectively communicated with both ends of the inner cavity through an intake port linkage valve and an exhaust port linkage valve. The sealing device is arranged in the inner cavity and is slidably connected to the outer cylinder wall, dividing the inner cavity into two non-communicating parts. The floating body is arranged outside the outer cylinder wall and is connected to the sealing device through the mechanical pull rod. The mechanical pull rod is slidably connected to the outer cylinder wall. The floating body is configured to drive the mechanical pull rod to reciprocate.

6. The water, electricity and gas co-generation power system according to claim 5, characterized in that, The intake port linkage valve and the corresponding exhaust port linkage valve are set to be state-interlocked.

7. The water-electricity-gas cogeneration power generation system according to claim 5, wherein Two adjacent ones of the plurality of two-way inflatable and exhaust single-flow pressure cylinder tanks are connected to one of the plurality of buffer tanks through the intake and exhaust pipe via a conveying pipeline.

8. The water-electricity-gas cogeneration power generation system according to claim 5, wherein, The floating body is configured to drive the mechanical pull rod to reciprocate by using wave energy, or to receive the wave energy generator to drive the mechanical pull rod to reciprocate by using electrical energy to generate mechanical energy.

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