CN111740475A - Single-stage conversion distributed battery energy storage system - Google Patents
Single-stage conversion distributed battery energy storage system Download PDFInfo
- Publication number
- CN111740475A CN111740475A CN202010725714.4A CN202010725714A CN111740475A CN 111740475 A CN111740475 A CN 111740475A CN 202010725714 A CN202010725714 A CN 202010725714A CN 111740475 A CN111740475 A CN 111740475A
- Authority
- CN
- China
- Prior art keywords
- battery
- energy storage
- module
- modules
- storage system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- 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
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a single-stage conversion distributed battery energy storage system, and belongs to the technical field of battery management. Each battery module is correspondingly connected with one DC-AC module in series, all the DC-AC modules are connected with a battery management system after being connected in parallel, and the battery management system is connected to an external power grid; all the battery modules are arranged in the energy storage container, and fireproof materials are filled between the battery modules and the energy storage container and between the adjacent battery modules; the DC-AC module is integrated with a BMS management system, and the battery module comprises a plurality of connected battery monomers. The system has reasonable structural design, high stability, high efficiency and high safety.
Description
Technical Field
The invention belongs to the technical field of battery management, and particularly relates to a single-stage conversion distributed battery energy storage system.
Background
With the gradual depletion of fossil fuel resources and the increasingly prominent environmental problems, traditional thermal power faces tremendous pressure. With the enhancement of environmental awareness and the promotion of national policies, more and more renewable energy sources begin to enter the field of power generation, such as wind power generation, photovoltaic power generation, hydroelectric power generation, biomass power generation, nuclear power generation and other modes. Because renewable energy power generation such as wind power and photovoltaic has volatility and uncertainty, with the increase of the generated energy of the renewable energy, large-scale high-proportion fluctuating power grid connection brings great challenges to the stable operation of a power grid. How to ensure the balance between power supply and demand and how to ensure the frequency stability, safety and reliability of a power system becomes a key problem to be solved urgently at present. The renewable energy power generation system is provided with the energy storage device with a certain capacity, so that peak regulation and frequency modulation, peak clipping and valley filling can be performed on a power station, the utilization ratio of new energy and the utilization efficiency of energy are improved, and the safe and stable operation of a power grid is guaranteed.
The battery energy storage is the most rapidly developed energy storage mode and has the advantages of high energy density, high energy conversion efficiency, high response speed, high adjustment precision and the like. The battery energy storage system can finish AGC dispatching instructions within 1s mainly by storing and releasing electric energy in a chemical energy form, and effectively improves the frequency modulation capability of the power system. Although the battery energy storage technology has an increasingly important position in the electric energy storage market, the battery energy storage system still has a big problem in practical application at present. The battery energy storage technology generally adopts a mode that battery packs are connected in series and then connected in parallel, the mode has high requirement on the consistency of batteries, and when one battery module breaks down or fires, irreversible damage can be caused to other battery modules and the whole battery system. On the other hand, because the existing heat pipe control technology of the energy storage system is incomplete, the temperature deviation among the battery modules is very easy to cause inconsistency of the operation state in the operation process, so that faults occur, even safety accidents occur, and fire disasters are caused.
Disclosure of Invention
In order to solve the above conventional problems, an object of the present invention is to provide a single-stage conversion distributed battery energy storage system, which has high stability, high efficiency, high safety and simple structure.
The invention is realized by the following technical scheme:
the invention discloses a single-stage conversion distributed battery energy storage system, which comprises a battery management system, a DC-AC module, a battery module and an energy storage container, wherein the battery management system is connected with the DC-AC module; each battery module is correspondingly connected with one DC-AC module in series, all the DC-AC modules are connected with a battery management system after being connected in parallel, and the battery management system is connected to an external power grid; all the battery modules are arranged in the energy storage container, and fireproof materials are filled between the battery modules and the energy storage container and between the adjacent battery modules;
the DC-AC module is integrated with a BMS management system, and the battery module comprises a plurality of connected battery monomers.
Preferably, the single batteries in the battery module are connected in series.
Preferably, the single battery is a lithium ion battery, a lead storage battery, a sodium-sulfur battery or a flow battery.
Preferably, the types of the single batteries in the same battery module are the same, and the types of the single batteries in different battery modules are the same or different.
Preferably, the energy storage container is made of fireproof materials.
Preferably, a flame retardant is added to the fire-resistant material.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a single-stage conversion distributed battery energy storage system, wherein one battery module corresponds to one DC-AC module, each battery module is connected with the corresponding DC-AC module in series to form a branch circuit, each branch circuit is connected to a battery management system after being connected in parallel, and the other end of the battery management system is directly connected with an external power grid. Each battery module in the system operates independently, and the operating efficiency of each battery module can be improved through respective DC-AC module control, so that the whole system has high stability, high efficiency and high safety. The battery modules are not directly connected in parallel, but are connected in parallel on the DC-AC module side, the fault of any battery module does not influence the normal work of other battery modules any more, and the hot plug can be directly carried out in the system, so that the utilization efficiency of the system is greatly improved; when a battery module breaks down, the system can be replaced without stopping. Through the BMS management system on the DC-AC module, the data such as voltage, current, temperature of the battery module in the operation process can be read, the working state of the battery is controlled through the data, the balance among the battery modules is carried out, the operation efficiency of the battery energy storage system is improved, and the service life of the system is prolonged.
The battery management system can calculate and analyze the capacity of the battery through analyzing the voltage and the current, and can allocate the charging and discharging priority of the battery according to the data, so that the electric quantity of the battery is kept in a balanced state, and the cycle number of the battery is increased. Can the current temperature condition of real time monitoring battery module through temperature data, when the temperature was too high, can directly cut off this battery module, the prevention conflagration takes place, plays the effect of protecting whole battery energy storage system. The system can also evaluate the running state information of each battery module, analyze the running state of the whole energy storage system, diagnose the sent fault and predict the non-fault, and monitor the power information required by the power grid in real time, thereby managing and allocating the charge-discharge state of the battery energy storage in time, ensuring that the electric quantity of each battery module is basically balanced, ensuring that the output power of the energy storage system meets the requirement of power grid dispatching, and realizing stable output. In addition, only a single-stage conversion topological structure is arranged in the system, bidirectional voltage rise and drop between the energy storage battery module and the alternating current bus can be directly realized, the structure is simple, the conversion efficiency can reach more than 97%, and the single-stage conversion parallel operation can support the energy conversion of a larger-capacity energy storage system. The system does not increase the power of the single-group battery system, the battery system can be made into a modular product, the expansion is convenient, the redundancy is high, the cost can be greatly saved, and the system economy is improved. The fireproof material filled between the battery module and the energy storage container and between the adjacent battery modules can protect other battery modules from being influenced after the single battery module breaks down and fires, and the safety and the stability of the system are further improved.
Furthermore, the single batteries in the battery module are connected in series, so that the capacity among the single batteries can be kept balanced, and the stability of the system is improved.
Furthermore, the single batteries in the same battery module are of the same type, and the consistency is higher; the single batteries in different battery modules are of the same type or different types, the application of the energy storage system is not influenced, and the application range of the batteries can be expanded, such as the utilization of echelon batteries.
Furthermore, the energy storage container is made of fireproof materials, and the safety of the whole system is prevented from being endangered after the fire breaks out.
Furthermore, a fire retardant is added into the fireproof material, so that the fire retardant effect is further improved, and the safety and the stability of the system are improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the single-stage conversion decentralized battery energy storage system of the invention.
In the figure: the battery management system is 1, the DC-AC module is 2, and the battery module is 3.
Detailed Description
The invention will now be described in further detail with reference to the following drawings and specific examples, which are intended to be illustrative and not limiting:
referring to fig. 1, the distributed battery energy storage system with single-stage conversion of the present invention includes a battery management system 1, a DC-AC module 2, a battery module 3 and an energy storage container; each battery module 3 is correspondingly connected with one DC-AC module 2 in series, all the DC-AC modules 2 are connected with the battery management system 1 after being connected in parallel, and the battery management system 1 is connected to an external power grid; all battery modules 3 are arranged in the energy storage container, fireproof materials are filled between the battery modules 3 and the energy storage container and between the adjacent battery modules 3, and flame retardants can be added into the fireproof materials. The energy storage container is made of fireproof materials.
The DC-AC module 2 is integrated with a BMS management system, the battery module 3 comprises a plurality of battery monomers which are connected in series or in parallel, the battery monomers are lithium ion batteries, lead storage batteries, sodium-sulfur batteries or flow batteries, the types of the battery monomers in the same battery module 3 are the same, and the types of the battery monomers in different battery modules 3 can be the same or different.
The battery management system 1 may employ a host computer with automatic control software.
The single-stage conversion distributed battery energy storage system works:
the BMS management system on the DC-AC module 2 can read the voltage, current, temperature and other data of the battery module 3 in the operation process, controls the working state of the battery through the data, balances the battery modules 3, and improves the operation efficiency and service life of the whole battery energy storage system.
The operation parameter data of each DC-AC module 2 is sent to the battery management system 1 in real time, so that the battery management system 1 can manage the whole battery energy storage system in time through the parameter analysis. The capacity of the battery can be obtained through calculation and analysis of the voltage and the current, the charging and discharging priority order of the battery can be adjusted according to the data, the electric quantity of the battery is kept in a balanced state to the greatest extent, and the cycle number of the battery is increased. Can know the present temperature condition of battery through the data to the temperature, can cool down through the ventilation equipment or the air conditioner of control in the energy storage container, when the high temperature, can directly cut off this battery module 3, the prevention conflagration takes place, plays the effect of protecting whole battery energy storage system.
The battery management system 1 controls the operation of each battery module 3 by controlling the respective DC-AC modules 2. The battery management system 1 is mainly used for timely managing and allocating the charging and discharging states of the stored energy of the batteries by evaluating the running state information of each battery module 3, analyzing the running state of the whole energy storage system, diagnosing sent faults, prejudging whether the faults occur or not and monitoring the power information required by the power grid in real time, so that the electric quantity of each battery module 3 is basically kept balanced, the output power of the energy storage system is ensured to meet the requirement of power grid dispatching, stable output is realized, the dynamic regulation response time is less than 0.1s, and the deviation value of the actual output power and the power required by the power grid is not more than 3%.
The single-stage decentralized cell energy storage system according to the invention is further explained below with a specific exemplary embodiment:
the single batteries adopt lithium iron phosphate batteries, the lithium iron phosphate batteries are grouped in a series connection mode to form battery modules with power of 125kW/125kWh, the battery modules are not directly connected in parallel, and each battery module is connected with a 125kW DC-AC bidirectional buck-boost alternating current converter in series. Every 10 alternating current energy storage units are connected in parallel at the bus side of the DC-AC bidirectional buck-boost alternating current converter to form a 1.25MWh alternating current unit, and an alternating current bus with the alternating voltage of 800V-850V is formed. Each battery container has 20 clusters of batteries, and 2 sets of 1.25MW 1.25MWh alternating-current units are formed, so that an energy storage system container with 2.5MWh is formed.
It should be noted that, in the embodiments provided in the present application, the disclosed technical content mainly refers to the battery module architecture in the battery energy storage system, and the above-described examples are merely illustrative, for example, the battery type used may be a lithium iron phosphate battery, or may be a lead storage battery, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted or not executed.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention disclosed herein, or the equivalent structures or equivalent flow conversion processes using the contents of the present specification and the drawings, or the direct and indirect applications in other related fields, shall be covered by the scope of the present invention.
Claims (6)
1. A single-stage conversion distributed battery energy storage system is characterized by comprising a battery management system (1), a DC-AC module (2), a battery module (3) and an energy storage container; each battery module (3) is correspondingly connected with one DC-AC module (2) in series, all the DC-AC modules (2) are connected with the battery management system (1) in parallel, and the battery management system (1) is connected to an external power grid; all the battery modules (3) are arranged in the energy storage container, and fireproof materials are filled between the battery modules (3) and the energy storage container and between the adjacent battery modules (3);
the DC-AC module (2) is integrated with a BMS management system, and the battery module (3) comprises a plurality of connected battery cells.
2. The single-stage conversion decentralized battery energy storage system according to claim 1, wherein the cells in the battery module (3) are connected in series.
3. The single-stage conversion decentralized battery energy storage system according to claim 1, wherein the individual battery is a lithium ion battery, a lead storage battery, a sodium sulfur battery, or a flow battery.
4. The single-stage conversion decentralized battery energy storage system according to claim 1, wherein the types of cells in the same battery module (3) are the same, and the types of cells in different battery modules (3) are the same or different.
5. The single-stage decentralized battery energy storage system according to claim 1, wherein the energy storage container is made of a fire-proof material.
6. The single-stage decentralized battery energy storage system according to claim 1, wherein a fire retardant is added to the fire-resistant material.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010725714.4A CN111740475A (en) | 2020-07-24 | 2020-07-24 | Single-stage conversion distributed battery energy storage system |
| JP2023600009U JP3242683U (en) | 2020-07-24 | 2021-07-26 | Single-stage conversion distributed battery energy storage system |
| PCT/CN2021/108493 WO2022017534A1 (en) | 2020-07-24 | 2021-07-26 | Distributed battery energy storage system capable of single-stage conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010725714.4A CN111740475A (en) | 2020-07-24 | 2020-07-24 | Single-stage conversion distributed battery energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111740475A true CN111740475A (en) | 2020-10-02 |
Family
ID=72657705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010725714.4A Pending CN111740475A (en) | 2020-07-24 | 2020-07-24 | Single-stage conversion distributed battery energy storage system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3242683U (en) |
| CN (1) | CN111740475A (en) |
| WO (1) | WO2022017534A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737130A (en) * | 2021-01-08 | 2021-04-30 | 华能陇东能源有限责任公司 | Energy storage system with mixed flow battery and lithium battery and working method thereof |
| CN113285130A (en) * | 2021-06-25 | 2021-08-20 | 中国华能集团清洁能源技术研究院有限公司 | Rechargeable distributed control battery system and working method thereof |
| CN113689649A (en) * | 2021-07-31 | 2021-11-23 | 华能新能源股份有限公司 | Fire early warning method, fire early warning system and computer equipment |
| WO2022017534A1 (en) * | 2020-07-24 | 2022-01-27 | 中国华能集团清洁能源技术研究院有限公司 | Distributed battery energy storage system capable of single-stage conversion |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447285A (en) * | 2011-10-10 | 2012-05-09 | 南方电网科学研究院有限责任公司 | Large-capacity battery converter and control method thereof |
| CN105140946A (en) * | 2015-09-02 | 2015-12-09 | 国网上海市电力公司 | Lithium ion battery energy storage power station |
| CN109449341A (en) * | 2018-12-18 | 2019-03-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of battery energy storage system framework |
| CN109617106A (en) * | 2019-01-15 | 2019-04-12 | 中国华能集团清洁能源技术研究院有限公司 | A kind of distributing battery energy storage system |
| CN210669641U (en) * | 2019-11-26 | 2020-06-02 | 浙江正泰新能源开发有限公司 | Container type energy storage system |
| CN111740475A (en) * | 2020-07-24 | 2020-10-02 | 中国华能集团清洁能源技术研究院有限公司 | Single-stage conversion distributed battery energy storage system |
-
2020
- 2020-07-24 CN CN202010725714.4A patent/CN111740475A/en active Pending
-
2021
- 2021-07-26 WO PCT/CN2021/108493 patent/WO2022017534A1/en active Application Filing
- 2021-07-26 JP JP2023600009U patent/JP3242683U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022017534A1 (en) * | 2020-07-24 | 2022-01-27 | 中国华能集团清洁能源技术研究院有限公司 | Distributed battery energy storage system capable of single-stage conversion |
| CN112737130A (en) * | 2021-01-08 | 2021-04-30 | 华能陇东能源有限责任公司 | Energy storage system with mixed flow battery and lithium battery and working method thereof |
| CN113285130A (en) * | 2021-06-25 | 2021-08-20 | 中国华能集团清洁能源技术研究院有限公司 | Rechargeable distributed control battery system and working method thereof |
| CN113689649A (en) * | 2021-07-31 | 2021-11-23 | 华能新能源股份有限公司 | Fire early warning method, fire early warning system and computer equipment |
| CN113689649B (en) * | 2021-07-31 | 2022-11-15 | 华能新能源股份有限公司 | Fire early warning method, fire early warning system and computer equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022017534A1 (en) | 2022-01-27 |
| JP3242683U (en) | 2023-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111740475A (en) | Single-stage conversion distributed battery energy storage system | |
| CN107579296B (en) | Lithium battery dynamic power system and vehicle | |
| CN212627257U (en) | String type two-stage conversion battery energy storage system comprising pre-diagnosis module | |
| CN102842914A (en) | Energy storage power station monitoring system | |
| WO2022017536A1 (en) | Modular distributed water-cooled battery energy storage system | |
| WO2022028434A1 (en) | Multi-branch electrochemical energy storage system having battery cell diagnosis function | |
| CN116799844B (en) | Portable distributed energy storage system | |
| CN111740474A (en) | Battery energy storage system based on distributed control and layout and energy scheduling method thereof | |
| Subburaj et al. | Analysis and review of grid connected battery in wind applications | |
| Gao et al. | Field exploration and analysis of power grid side battery energy storage system | |
| CN115378014A (en) | Intelligent group string type energy storage system and energy storage device thereof | |
| CN116094180A (en) | Local energy management machine for energy storage system | |
| CN212343400U (en) | Single-stage conversion distributed battery energy storage system | |
| CN212304838U (en) | Modularized distributed water-cooled battery energy storage system | |
| CN102495333A (en) | Internal fault judgment method for micro-grid power system | |
| CN104143654A (en) | Floating charge protection type lithium iron phosphate storage battery and application thereof to direct current system of electric power engineering | |
| CN114123274A (en) | Comprehensive energy layered optimization operation method and system of hydrogen utilization system | |
| CN209896705U (en) | Park comprehensive energy system | |
| CN214154157U (en) | Energy storage system with mixed flow battery and lithium battery | |
| CN210468888U (en) | Uninterruptible power supply system | |
| Zuozhou et al. | Definition and influencing factors of short-circuit ratio between offshore wind power cluster and thermal power bundling system | |
| CN112713520A (en) | Off-grid wind-solar energy storage intelligent power supply system | |
| CN212343401U (en) | Battery energy storage system based on distributed control and layout | |
| CN213637110U (en) | Energy storage integrated power supply | |
| CN112490519B (en) | High-instantaneity synchronous acquisition lithium battery management system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |