CN116191479A - System and method for simultaneously carrying out online peak regulation and frequency modulation on flow battery - Google Patents
System and method for simultaneously carrying out online peak regulation and frequency modulation on flow battery Download PDFInfo
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- CN116191479A CN116191479A CN202310456783.3A CN202310456783A CN116191479A CN 116191479 A CN116191479 A CN 116191479A CN 202310456783 A CN202310456783 A CN 202310456783A CN 116191479 A CN116191479 A CN 116191479A
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- flow battery
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003827 upregulation Effects 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000003828 downregulation Effects 0.000 claims abstract description 13
- 239000003792 electrolyte Substances 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 9
- 230000009977 dual effect Effects 0.000 abstract 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000002222 downregulating effect Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to the technical field of flow batteries, in particular to a system and a method for simultaneously carrying out on-line peak regulation and frequency modulation on a flow battery, wherein the configuration power of a PCS alternating-current/direct-current conversion unit is 1.5-2.5 times of the rated power Y of the flow battery, namely (1.5-2.5) Y; then, the frequency modulation capability of the flow battery in the working state of charging and peak shaving according to rated power Y is as follows: the frequency up-regulation capacity is 2.5Y, and the frequency down-regulation capacity is 0.5Y-1.5Y; the frequency modulation capability of the flow battery in the rated power Y discharge peak regulation working state is as follows: the frequency up-regulation capability is 0.5Y, and the frequency down-regulation capability is 2.5Y; the frequency modulation capability of the flow battery in the zero-power charge-discharge state is as follows: the up-and down-regulation capability of the frequency is 1.5Y. The energy storage system of the flow battery can realize the short-time primary frequency modulation function by utilizing the short-time overload capacity of the flow battery while applying the long-time energy storage peak regulation, so that a small amount of investment is increased, and the dual benefits of peak regulation and frequency modulation are realized.
Description
Technical Field
The invention relates to the technical field of flow batteries, in particular to a system and a method for simultaneously carrying out online peak regulation and frequency modulation on a flow battery.
Background
Under the pressure of global energy decarbonization, the duty ratio of new energy photovoltaic and wind power generation is larger and larger, but the fluctuation and randomness of the photovoltaic and the wind power generation bring difficulty to power grid and load power utilization dispatching, and an energy storage device is required to be matched for smooth and stable power and peak-to-valley regulation. The electrochemical energy storage technology route is widely applied due to the flexibility, particularly the lithium ion battery, and is widely applied to short-time peak regulation and frequency modulation occasions; but its safety and cycle life are questioned. Fire faults occur many times in energy storage power stations at home and abroad.
The flow battery is generally considered as an intrinsic safe energy storage battery, and is characterized by being mainly capable of being charged and discharged deeply with high power, storing energy for a long time, being low in multiplying power, being capable of being overloaded with high power for a short time, and being gradually commercialized in the field of long-time energy storage. At present, no flow battery is comprehensively applied to long-time energy storage peak regulation and frequency modulation.
Disclosure of Invention
The invention aims to provide a system and a method for simultaneously carrying out online peak regulation and frequency modulation on a flow battery, which are used for solving the problem that no method for carrying out online peak regulation and frequency modulation on the flow battery is adopted in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a flow battery simultaneous on-line peak regulation and frequency modulation system comprises:
the system comprises an energy capacity unit, a direct current power unit and a PCS alternating current-direct current conversion unit, wherein the energy capacity unit is used for configuring the amount of positive and negative electrolyte of the flow battery according to peak regulation application requirements; the direct current power unit is used for determining rated power Y of the flow battery according to comprehensive consideration of peak regulation and frequency modulation application; the configuration power of the PCS alternating-current-direct-current conversion unit is 1.5-2.5 times of the rated power Y of the flow battery, namely (1.5-2.5) Y.
The invention also provides a peak regulation and frequency modulation method of the flow battery on-line peak regulation and frequency modulation system, which comprises the following steps: firstly, configuring power of a PCS alternating-current/direct-current conversion unit to be 1.5-2.5 times of rated power Y of a flow battery, namely (1.5-2.5) Y; then, the frequency modulation capability of the flow battery in the working state of charging and peak shaving according to rated power Y is as follows: the frequency up-regulation capacity is 2.5Y, and the frequency down-regulation capacity is 0.5Y-1.5Y; the frequency modulation capability of the flow battery in the rated power Y discharge peak regulation working state is as follows: the frequency up-regulation capability is 0.5Y, and the frequency down-regulation capability is 2.5Y; the frequency modulation capability of the flow battery in the zero-power charge-discharge state is as follows: the up-and down-regulation capability of the frequency is 1.5Y.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the system and the method, the energy storage system of the flow battery can realize the short-time primary frequency modulation function by utilizing the short-time overload capacity of the flow battery while long-time energy storage and peak regulation application through the power conversion interface of the super-distribution flow battery (namely, increasing the power of the PCS AC/DC conversion unit), so that a small amount of investment is increased, and double benefits of peak regulation and frequency modulation are realized; because the flow battery is adopted, the lithium ion battery can be deeply charged and deeply discharged, is less influenced by the SOC, and has far better safety performance and service life than the traditional lithium battery.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
Examples
Referring to fig. 1, the present invention provides a technical solution: a flow battery simultaneous on-line peak regulation and frequency modulation system comprises:
the system comprises an energy capacity unit, a direct current power unit and a PCS alternating current-direct current conversion unit, wherein the energy capacity unit is used for configuring the amount of positive and negative electrolyte of the flow battery according to peak regulation application requirements; the direct current power unit is used for determining rated power Y of the flow battery according to comprehensive consideration of peak regulation and frequency modulation application; the configuration power of the PCS AC/DC conversion unit is 1.5-2.5 times of the rated power Y of the flow battery, namely (1.5-2.5) Y, and the rated power of the flow battery is 1MW in the embodiment, so that the configuration power of the PCS AC/DC conversion unit is calculated to be 1.5MW according to 1.5 times.
The invention also provides a peak regulation and frequency modulation method of the flow battery on-line peak regulation and frequency modulation system, which comprises the following steps: firstly, the configuration power of a PCS alternating-current-direct-current conversion unit is 1.5 times of the rated power Y of a flow battery, namely 1.5Y; then, the frequency modulation capability of the flow battery in the working state of charging and peak shaving according to rated power Y is as follows: the frequency up-regulation capacity is 2.5Y, and the frequency down-regulation capacity is 0.5Y-1.5Y; the frequency modulation capability of the flow battery in the rated power Y discharge peak regulation working state is as follows: the frequency up-regulation capability is 0.5Y, and the frequency down-regulation capability is 2.5Y; the frequency modulation capability of the flow battery in the zero-power charge-discharge state is as follows: the up-and down-regulation capability of the frequency is 1.5Y.
When the power grid load is larger than the generated energy, the generated energy is insufficient to support the power grid load, if the power grid electric quantity fluctuates downwards, the frequency modulation can be carried out through the flow battery, the frequency modulation mode can be that 1, the flow battery is not charged, 2, the flow battery discharges according to rated power, 3, the flow battery discharges according to 0.5 times overload, and the three modes are combined, so that the frequency up-regulating capacity of the flow battery is equivalent to 2.5Y. If the electric quantity of the power grid fluctuates upwards, the flow battery needs to be matched with the down-regulating frequency, and the maximum value of the down-regulating frequency is 0.5Y-1.5Y.
On the contrary, when the load of the power grid is smaller than the generated energy, if the electric quantity of the power grid fluctuates upwards, the frequency modulation can be carried out through the flow battery, the frequency modulation mode can be that 1 the flow battery is not discharged, 2 the flow battery is charged according to rated power, 3 the flow battery is charged according to 1.5Y, and the three modes are combined, which is equivalent to the frequency downregulation capability of the flow battery being 2.5Y. If the electric quantity of the power grid fluctuates downwards, the flow battery needs to be matched with the up-regulation frequency, and the maximum value of the up-regulation is 0.5Y.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A flow battery simultaneously online peak regulation and frequency modulation system is characterized in that: comprising the following steps:
the system comprises an energy capacity unit, a direct current power unit and a PCS alternating current-direct current conversion unit, wherein the energy capacity unit is used for configuring the amount of positive and negative electrolyte of the flow battery according to peak regulation application requirements; the direct current power unit is used for determining rated power Y of the flow battery according to comprehensive consideration of peak regulation and frequency modulation application; the configuration power of the PCS alternating-current-direct-current conversion unit is 1.5-2.5 times of the rated power Y of the flow battery, namely (1.5-2.5) Y.
2. A peak regulation and frequency modulation method adopting the flow battery of claim 1 and an on-line peak regulation and frequency modulation system is characterized in that: the method comprises the following steps: firstly, configuring power of a PCS alternating-current/direct-current conversion unit to be 1.5-2.5 times of rated power Y of a flow battery, namely (1.5-2.5) Y; then, the frequency modulation capability of the flow battery in the working state of charging and peak shaving according to rated power Y is as follows: the frequency up-regulation capacity is 2.5Y, and the frequency down-regulation capacity is 0.5Y-1.5Y; the frequency modulation capability of the flow battery in the rated power Y discharge peak regulation working state is as follows: the frequency up-regulation capability is 0.5Y, and the frequency down-regulation capability is 2.5Y; the frequency modulation capability of the flow battery in the zero-power charge-discharge state is as follows: the up-and down-regulation capability of the frequency is 1.5Y.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310456783.3A CN116191479B (en) | 2023-04-26 | 2023-04-26 | System and method for simultaneously carrying out online peak regulation and frequency modulation on flow battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310456783.3A CN116191479B (en) | 2023-04-26 | 2023-04-26 | System and method for simultaneously carrying out online peak regulation and frequency modulation on flow battery |
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| Publication Number | Publication Date |
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| CN116191479A true CN116191479A (en) | 2023-05-30 |
| CN116191479B CN116191479B (en) | 2023-08-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120257694A1 (en) * | 2011-04-06 | 2012-10-11 | Texas Instruments Incorporated | Methods, circuits, systems and apparatus providing audio sensitivity enhancement in a wireless receiver, power management and other performances |
| CN107394243A (en) * | 2017-07-10 | 2017-11-24 | 上海电气集团股份有限公司 | A kind of redox flow battery energy storage system and the system with intermittent energy source |
| CN115224704A (en) * | 2022-08-03 | 2022-10-21 | 北京能高自动化技术股份有限公司 | Time-sharing multiplexing peak-regulating frequency-modulating power station constructed based on hybrid energy storage and control method |
| CN115347549A (en) * | 2022-08-16 | 2022-11-15 | 青海能高新能源有限公司 | Energy storage system of flow battery on electric ship and control method |
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2023
- 2023-04-26 CN CN202310456783.3A patent/CN116191479B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120257694A1 (en) * | 2011-04-06 | 2012-10-11 | Texas Instruments Incorporated | Methods, circuits, systems and apparatus providing audio sensitivity enhancement in a wireless receiver, power management and other performances |
| CN107394243A (en) * | 2017-07-10 | 2017-11-24 | 上海电气集团股份有限公司 | A kind of redox flow battery energy storage system and the system with intermittent energy source |
| CN115224704A (en) * | 2022-08-03 | 2022-10-21 | 北京能高自动化技术股份有限公司 | Time-sharing multiplexing peak-regulating frequency-modulating power station constructed based on hybrid energy storage and control method |
| CN115347549A (en) * | 2022-08-16 | 2022-11-15 | 青海能高新能源有限公司 | Energy storage system of flow battery on electric ship and control method |
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| CN116191479B (en) | 2023-08-01 |
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Address after: 312000 Houses in Zone B, west of the intersection of Hupingshan Road and Bujin Road, Qixian Street, Keqiao District, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Xingchen New Energy Technology Co.,Ltd. Country or region after: China Address before: Room 02A-472, Building B (2nd Floor), No. A28 Information Road, Haidian District, Beijing, 100080 Patentee before: Beijing Xingchen Xinneng Technology Co.,Ltd. Country or region before: China |