CN113381425A - Combined high-efficient high density energy memory of distributing type new forms of energy module - Google Patents
Combined high-efficient high density energy memory of distributing type new forms of energy module Download PDFInfo
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- CN113381425A CN113381425A CN202110822555.4A CN202110822555A CN113381425A CN 113381425 A CN113381425 A CN 113381425A CN 202110822555 A CN202110822555 A CN 202110822555A CN 113381425 A CN113381425 A CN 113381425A
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- energy
- storage device
- energy storage
- hydraulic variable
- power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/006—Systems for storing electric energy in the form of pneumatic energy, e.g. compressed air energy storage [CAES]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
A distributed new energy module combined type high-efficiency high-density energy storage device is suitable for wind power and photovoltaic power generation fields, can be installed in a tower of a wind generating set, and forms a generating set with a single machine for intelligently and independently controlling generated energy with the set. The method is also suitable for peak load shifting energy conservation and energy cost reduction of power consumption end customers, and is also suitable for application of the self-built energy storage station of the power grid. The energy storage unit combination with standard power has mature technology and process, simple combination, abundant capacity and high energy conversion efficiency, and is a standard modular energy storage device suitable for the combined application of new energy power farms with different scales. The device can be used for collecting and storing the excess electric energy generated when the wind energy or the light energy is too strong and when the power consumption of the power grid is low, and converting the electric energy into the compression energy of inert gas through the conversion of the liquid energy and storing the compression energy in the energy storage device. When wind energy or solar energy is weak and the power utilization peak of the power grid, the wind energy or solar energy is released and converted into electric energy to be transmitted back to the power grid, and efficient storage and utilization of new energy and automatic adjustment of generated energy are achieved.
Description
The technical field is as follows:
the invention relates to a distributed new energy module combined type efficient high-density energy storage
Provided is a device. The energy storage device is particularly suitable for wind energy and photovoltaic power generation farms, and is also suitable for peak load shifting, energy saving and cost reduction of power customers and self-built power storage stations of power grids. The device is an advantage for improving the clean energy consumption capacity of the new energy power generation field, realizing the generated energy autonomous regulation of the distributed new energy power generation field, and reducing the energy cost by staggering the peak of a power end client.
Secondly, background art:
the development and utilization of new energy are important marks of human civilization progress, and new energy is developed
The source is an important strategy for realizing sustainable development of China and realizing carbon neutralization. In order to improve the new energy consumption capability and the peak regulation capability of a power grid of a wind power plant and a photovoltaic power plant, various energy storage devices become important problems which need to be solved by a new energy strategy. There are two main types in the existing new energy storage technology: one is hydraulic energy storage; one type is battery storage. Their main disadvantages are: firstly, the hydraulic energy storage engineering cost is huge, the stored energy density is low, the energy conversion efficiency is low, and only long-distance construction and transmission can be realized, and the hydraulic energy storage engineering is particularly not suitable for being applied to ocean wind power plants. Secondly, the storage battery energy storage prior art is high in cost, and the service life and other technical indexes of the storage battery energy storage prior art are still under investigation.
The invention is a bottleneck technology which is to be solved in the strategic development of new energy in China based on an energy storage technology.
Description
The second invention is based on the above two disadvantages in the existing energy storage technology.
Thirdly, the invention content:
the invention aims to develop a distributed new energy module combination type
The high-efficiency high-density energy storage device is combined by energy storage units with standard power, has high energy density and conversion efficiency, and is easy to install and combine; the module combined type energy storage device has abundant productivity, mature technology and manufacturing process, low cost, long service life and no pollution, and is suitable for distributed new energy power farms of different scales to realize high-efficiency utilization of clean energy and autonomous adjustment of generated energy and combined application on site.
The action principle of the high-efficiency high-density energy storage device is as follows: when the wind energy or the light energy is too strong and the electricity consumption of the power grid is low, the surplus electric energy drives the motor to drive the hydraulic variable pump, high-pressure liquid is pumped out and enters the piston type or air bag type energy storage device through the pipeline to convert the high-pressure liquid into gas compression energy on site; the flow rate of the electric energy is adjusted by the central control room along with the change of the excess electric energy. When wind energy or light energy is weak and power consumption of a power grid is high, gas compression energy is converted into liquid pressure energy, a generator is driven by a hydraulic variable motor to be converted into electric energy to be transmitted back to the power grid, and the generated energy is automatically adjusted by a central control room along with an electric quantity gap through the flow of an input motor.
The distributed new energy module combined high-efficiency high-density energy storage device is composed of an electric motor
The hydraulic variable displacement generator comprises a machine 1, a hydraulic variable displacement pump 2, a generator 3, a hydraulic variable displacement motor 4, a directional control valve 5, an energy accumulator 6, an oil tank 7, a pipeline 8, a safety valve 9 and the like. The method is characterized in that: the energy storage 6 is a piston type energy storage; the conversion of surplus electric energy is that the surplus electric energy drives the motor 1 to drive the hydraulic variable pump 2 to pump out high-pressure liquid passing through matched with surplus electric quantity
Description
The control valve 5 is fed into an energy storage device 6, a piston of the energy storage device 6 is pushed to compress inert gas, and surplus electric energy is converted into gas compression energy in situ and stored in the energy storage device 6; the supplement of the deficient electric energy is that the gas compression energy in the energy accumulator 6 is converted into high-pressure oil to drive the hydraulic variable motor 4, the hydraulic variable motor 4 drives the generator 3, and the generated electric energy returns to the power supply network; the generated energy is automatically adjusted by the hydraulic variable motor 4 according to the electric quantity gap. The action principle is as follows: when wind energy or light energy is too strong and the electricity consumption of a power grid is low, the surplus electric energy drives the motor 1 to drive the hydraulic variable pump 2 to pump high-pressure liquid out, the high-pressure liquid is controlled by the direction control valve 5 and enters the energy storage device 6 through the pipeline 8, the piston of the energy storage device 6 is extruded to continuously move upwards to compress inert gas, and the surplus electric energy is converted into gas compression energy. When wind energy or light energy is weak and power consumption peak of the power grid occurs, the direction control valve 5 is reversed, gas compression energy stored in the energy storage 6 is converted into high-pressure oil to drive the hydraulic variable motor 4, and the generator 3 is driven to generate power and return to the power grid. The single group of converted electric quantity is automatically adjusted by the hydraulic variable pump 2 according to the surplus of the electric quantity, and the total converted electric quantity is automatically adjusted by the combination of the quantity and the specification of the invention started by a central control room; the single-group generating capacity is automatically adjusted by the hydraulic variable motor 4 according to the electric quantity gap, and the total generating capacity is adjusted by the combination of the quantity and the specification of the invention started by the central control room.
The motor 1, the generator 3, the hydraulic variable pump 2 and the hydraulic variable motor 4 of the present invention may be an electric generator or a variable pump/motor.
The energy accumulator 6 can adopt a plurality of piston type energy accumulators to be connected in parallel and used in a group, and can also be combined with piston type energy accumulators with different specifications for application.
The energy accumulator 6 of the invention is the combined application of a piston type energy accumulator and an air bag type energy accumulator,
description
The energy storage device can also be applied in combination with other structural forms.
The hydraulic variable pump 2 and the hydraulic variable motor 4 can be a multiple gear pump and a motor, and the variable mode adopts direction valve control to realize differential regulation.
The directional control valve 5 of the present invention may be a combination of discrete components of the reversing valve and the flow valve, or an integrated component.
The hydraulic variable pump 2 can be driven by the gear boxes of the wind generating set in parallel, and directly converts the surplus wind energy into gas compression energy to be stored in the energy storage 6; when power is lacked, the gas compression energy is released from the energy storage 6 to drive the hydraulic variable motor 4 to drive the generator 3, and power is generated and transmitted back to the power grid.
The invention can be arranged in a tower of a wind generating set in groups to form a generating set with a single machine for intelligent and autonomous control of generated energy with the set.
Fourthly, explanation of the attached drawings:
FIG. 1 shows a high-efficiency and high-density combined new energy module of the invention
Schematic diagram of an energy storage device.
The fifth embodiment is as follows:
the specific implementation mode of the invention is as follows: when wind energy or light energy is too strong and the electricity consumption of a power grid is low, the surplus electric energy drives the motor 1 to drive the hydraulic variable pump 2 to pump high-pressure liquid out, the high-pressure liquid enters the energy storage device 6 through the direction control valve 5 and the pipeline 8, the piston of the energy storage device 6 is continuously pushed upwards to compress inert gas stored in the upper cavity of the piston in advance, and the surplus electric energy is converted into inert gas compression energy stored in the upper cavity of the piston. When wind energy or light energy is weak, the power is used in power grid
Description
At the peak, the direction control valve 5 is reversed, the compressed energy of the inert gas in the upper cavity of the piston of the energy storage 6 is converted into high-pressure oil to drive the hydraulic variable motor 4, and the generator 3 is driven to generate electricity and return to the power grid. The single group of converted electric quantity is automatically adjusted by the hydraulic variable pump 2 according to the surplus of the electric quantity, and the total converted electric quantity is automatically adjusted by the combination of the quantity and the specification of the invention started by a central control room; the single-group generating capacity is automatically adjusted by the hydraulic variable motor 4 according to the electric quantity gap, and the total generating capacity is adjusted by the combination of the quantity and the specification of the invention started by the central control room.
Claims (8)
1. A distributed new energy module combined type high-efficiency high-density energy storage device is formed by combining an electric motor (1), a hydraulic variable pump (2), a generator (3), a hydraulic variable motor (4), a direction control valve (5), an energy storage device (6), an oil tank (7), a pipeline (8) and a safety valve (9); the method is characterized in that: the energy accumulator (6) is a piston type energy accumulator; the surplus electric energy is converted into gas compression energy which is stored in the energy storage device (6) by driving the motor (1) to drive the hydraulic variable pump (2) by the surplus electric energy, pumping high-pressure liquid matched with the surplus electric quantity into the energy storage device (6) through the directional control valve (5) and pushing a piston of the energy storage device (6) to move upwards to compress inert gas; the supplement of the deficient electric energy is that the gas compression energy in the energy storage device (6) is converted into high-pressure oil to drive the hydraulic variable motor (4), the hydraulic variable motor (4) drives the generator (3) to generate electric energy to return to the power supply network; the action principle is as follows: when wind energy or light energy is too strong and the electricity consumption of a power grid is low, the surplus electric energy drives the motor (1) to drive the hydraulic variable pump (2) to pump out high-pressure liquid, the high-pressure liquid enters the energy storage device (6) through the direction control valve (5) and the pipeline (8), a piston of the energy storage device (6) is extruded to continuously move upwards to compress inert gas, and the surplus electric energy is converted into gas compression energy to be stored in the energy storage device (6); when wind energy or light energy is weak and the power consumption peak of the power grid is high, the direction control valve (5) is reversed, and gas compression energy in the energy storage device (6) is converted into high-pressure oil to drive the hydraulic variable motor (4) and drive the generator (3) to generate power and return the power grid; the single group of converted electric quantity is automatically adjusted by a hydraulic variable pump (2) according to the surplus of the electric quantity, and the total converted electric quantity is automatically adjusted by the combination of the quantity and the specification of the invention started by a central control room; the single-group generating capacity is automatically adjusted by a hydraulic variable motor (4) according to the electric quantity gap, and the total generating capacity is adjusted by the combination of the quantity and the specification of the invention started by a central control room.
2. The combined high efficiency high density energy storage device of distributed new energy modules of claim 1, wherein: the energy storage devices (6) are connected in parallel and used in groups.
3. The combined high efficiency high density energy storage device of distributed new energy modules of claim 1, wherein: the electric motor (1), the generator (3), the hydraulic variable pump (2) and the hydraulic variable motor (4) are an electric and power generation dual-purpose machine and a variable pump and motor dual-purpose machine with combined functions.
4. The combined high efficiency high density energy storage device of distributed new energy modules of claim 1, wherein: the energy accumulator (6) is combined with an air bag type energy accumulator for application, and can also be combined with energy accumulators with other structural forms for application.
5. The combined high efficiency high density energy storage device of distributed new energy modules of claim 1, wherein: the directional control valve (5) is an integrated or a combination of discrete components of a directional valve and a flow valve.
6. The combined high efficiency high density energy storage device of distributed new energy modules of claim 1, wherein: the hydraulic variable pump (2) and the hydraulic variable motor (4) are a multiple gear pump and a motor.
7. The combined high-efficiency high-density energy storage device of distributed new energy modules according to claim 1, characterized in that: the hydraulic variable pump (2) is driven by the parallel connection of the gear boxes of the wind generating set, the surplus wind energy is directly converted into gas compression energy to be stored in the energy storage device (6), and the gas compression energy is released from the energy storage device (6) to drive the hydraulic variable motor (4) to drive the generator (3) to generate power and return the power grid in the absence of power.
8. The combined high efficiency high density energy storage device of distributed new energy modules of claim 1, wherein: the invention is installed in a tower of a wind generating set in groups to form a generating set with a single machine for intelligent and autonomous control of generated energy with the set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110822555.4A CN113381425A (en) | 2021-07-21 | 2021-07-21 | Combined high-efficient high density energy memory of distributing type new forms of energy module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110822555.4A CN113381425A (en) | 2021-07-21 | 2021-07-21 | Combined high-efficient high density energy memory of distributing type new forms of energy module |
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| CN113381425A true CN113381425A (en) | 2021-09-10 |
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| CN202110822555.4A Pending CN113381425A (en) | 2021-07-21 | 2021-07-21 | Combined high-efficient high density energy memory of distributing type new forms of energy module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321030A (en) * | 2021-11-16 | 2022-04-12 | 国家电投集团科学技术研究院有限公司 | Hydraulic power generation system and control method thereof |
-
2021
- 2021-07-21 CN CN202110822555.4A patent/CN113381425A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321030A (en) * | 2021-11-16 | 2022-04-12 | 国家电投集团科学技术研究院有限公司 | Hydraulic power generation system and control method thereof |
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