CN110970914A - Energy storage system with safety protection function - Google Patents
Energy storage system with safety protection function Download PDFInfo
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- CN110970914A CN110970914A CN201911170991.7A CN201911170991A CN110970914A CN 110970914 A CN110970914 A CN 110970914A CN 201911170991 A CN201911170991 A CN 201911170991A CN 110970914 A CN110970914 A CN 110970914A
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- energy storage
- bms
- safety protection
- battery unit
- battery
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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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- 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
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
Abstract
The invention discloses an energy storage system with a safety protection function, which comprises an energy storage battery system, an energy storage converter PCS and an energy storage monitoring system EMS, wherein: the energy storage battery system comprises an energy storage battery unit and a battery management system BMS; the battery management system BMS is respectively connected with the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS, and communication control links are arranged among the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS; the energy storage converter PCS is connected with the energy storage monitoring system EMS, and a communication control link is arranged between the energy storage converter PCS and the energy storage monitoring system EMS. The energy storage system with the safety protection function can meet the comprehensive processing of massive real-time monitoring data, has a redundant safety management channel, improves the abnormal rapid processing capacity, effectively improves the safety and reliability of the battery energy storage system, and has important practical application significance.
Description
Technical Field
The invention relates to the technical field of energy storage system safety protection, in particular to an energy storage system with a safety protection function.
Background
At present, the development of energy storage industry in China enters a motorway, wherein potential fire risks are caused due to the quality problems of batteries and a Process Control System (PCS) or the poor and uneven integration capability of the energy storage of a battery system, and the fire accidents of industrial and commercial energy storage power stations are frequent.
Therefore, at present, there is an urgent need to enhance the safety management of the battery energy storage system, so that the safety and reliability of the battery energy storage system can be effectively improved while the comprehensive processing of massive real-time monitoring data is satisfied.
Disclosure of Invention
The invention aims to provide an energy storage system with a safety protection function aiming at the technical defects in the prior art.
Therefore, the invention provides an energy storage system with a safety protection function, which comprises an energy storage battery system, an energy storage converter PCS and an energy storage monitoring system EMS, wherein:
the energy storage battery system comprises an energy storage battery unit and a battery management system BMS;
the battery management system BMS is respectively connected with the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS, and communication control links are arranged among the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS;
the energy storage converter PCS is connected with the energy storage monitoring system EMS, and a communication control link is arranged between the energy storage converter PCS and the energy storage monitoring system EMS.
The energy storage battery unit is used for uploading real-time running information to the battery management system BMS through the CAN bus and receiving a control command sent by the battery management system BMS.
The energy storage battery management unit BMS is used for monitoring, evaluating and protecting an electronic equipment set of the battery running state.
4. The energy storage system with safety protection function as claimed in claim 1, wherein the energy storage converter PCS is used for receiving real-time operation information of the energy storage battery unit transmitted by the battery management system BMS and receiving control commands sent by the battery management system BMS.
The energy storage converter PCS serves as a connecting device between an external power grid and the energy storage battery unit, is used for achieving alternating current-direct current bidirectional conversion, and is used for charging and discharging the energy storage battery unit.
The energy storage converter PCS is connected with an external power grid and is specifically used for converting alternating current transmitted by the external power grid into direct current, then charging the energy storage battery unit, converting the direct current output by the energy storage battery unit into alternating current and releasing the alternating current to the external power grid.
The energy storage monitoring system EMS is a data acquisition and monitoring control system and is used for receiving a scheduling instruction of an external power grid and receiving real-time operation information transmitted by the energy storage battery unit through the battery management system BMS, so that monitoring and management of the energy storage battery unit are realized.
The protocol adopted by the communication link between the battery management system BMS and the energy storage converter PCS comprises the following steps: at least one of CAN protocol, MODBUS RTU protocol based on 485 interface and MODBUS TCP protocol based on TCP/IP.
And another trunk contact is connected between the battery management system BMS and the energy storage converter PCS.
The communication link between the battery management system BMS and the energy storage monitoring system EMS adopts a MODBUS TCP protocol based on TCP/IP.
Compared with the prior art, the energy storage system with the safety protection function provided by the invention has the advantages that the comprehensive processing of massive real-time monitoring data can be met, meanwhile, the redundant safety management channel is provided, the abnormal rapid processing capability is improved, the safety and the reliability of the battery energy storage system are effectively improved, and the important practical application significance is realized.
Drawings
Fig. 1 is a block diagram of an energy storage system with a safety protection function according to the present invention;
fig. 2 is a block diagram of an embodiment of an energy storage system with a safety protection function according to the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 and fig. 2, the invention provides an energy storage system with a safety protection function, which includes an energy storage battery system, an energy storage converter PCS and an energy storage monitoring system EMS, wherein:
the energy storage battery system comprises an energy storage battery unit and a battery management system BMS;
the battery management system BMS is respectively connected with the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS, and communication control links are arranged among the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS;
the energy storage converter PCS is connected with the energy storage monitoring system EMS, and a communication control link is arranged between the energy storage converter PCS and the energy storage monitoring system EMS.
Therefore, according to the invention, the energy storage monitoring system EMS, the energy storage converter PCS and the battery management system BMS can cooperate with each other to well complete the processes of storing energy and releasing energy. In the operation process, control data, state data and protection data are transmitted among the three in real time.
It should be noted that the communication lines between these internal nodes of the battery energy storage system may cause some of the communication lines to be disconnected due to line length, wiring, interference, and other reasons, thereby causing system failure. The invention further provides communication links among the EMS, the PCS and the BMS, namely as shown in figures 1 and 2, the nodes are provided with direct communication links between every two nodes and are in a net-shaped redundant structure, therefore, when the communication links between the two nodes are interrupted, the communication between the two nodes can be realized through other links, the internal communication faults of the battery energy storage system are reduced, the problem of system faults in the related art is solved, and the stability and the reliability of the battery energy storage system and the whole power supply system are improved.
In a specific implementation of the present invention, the energy storage battery unit is an energy storage unit of the energy storage system of the present invention, and is configured to upload real-time operation information thereof to the battery management system BMS through the CAN bus and receive a control command sent from the battery management system BMS.
It should be noted that the energy storage battery unit includes a plurality of energy storage batteries, and the modularized integration process of the energy storage battery unit is as follows: single cell → battery module → battery cluster → battery stack. CAN communication is characterized by high reliability and faster transmission rate.
In the present invention, in a specific implementation, an energy storage battery management unit BMS is used for monitoring, evaluating, and protecting an electronic device set of a battery operating state, and specifically includes: monitoring and transmitting the running state information of the energy storage battery, the battery cluster and the battery stack, such as battery voltage, current, temperature, protection amount and the like; evaluating and calculating the SOC of the battery, the accumulated processing energy of the battery and the like; and to protect the battery, etc.
In the present invention, in a specific implementation, the energy storage converter PCS is configured to receive real-time operation information (i.e., key information of the energy storage battery unit) of the energy storage battery unit transmitted by the battery management system BMS, and receive a control command sent by the battery management system BMS.
In addition, in the concrete realization, energy storage converter PCS as the connecting device between outside electric wire netting and the energy storage battery unit, still is used for realizing the two-way conversion of alternating current-direct current for charge-discharge is carried out to the energy storage battery unit, specifically is: the energy storage converter PCS is connected with an external power grid and used for converting alternating current transmitted by the external power grid into direct current, then charging the energy storage battery unit, and converting the direct current output by the energy storage battery unit into alternating current to be released to the external power grid.
In addition, in the concrete implementation, a dry contact signal can be added between the energy storage converter PCS and the battery management system BMS so as to improve the response speed.
In addition, in the concrete implementation, the energy storage converter PCS and the energy storage monitoring system EMS carry out information interaction through an MODBUS protocol, and the energy storage battery unit is ensured to normally work in a safe and stable state.
It should be noted that, the energy storage converter PCS and the battery management system BMS mutually authenticate and control each other, and charge and discharge the energy storage battery unit, so as to ensure that the energy storage battery unit normally operates in a safe and stable state.
In a specific implementation of the present invention, the energy storage monitoring system EMS is a data acquisition and monitoring control system, and is configured to receive a scheduling instruction of an external power grid (i.e., an upper power grid), and receive real-time operation information transmitted by the energy storage battery unit through the battery management system BMS, so as to implement monitoring and management of the energy storage battery unit.
That is to say, the energy storage monitoring system EMS is used to monitor and control the on-site operating device, and realize the monitoring management of the energy storage battery unit, specifically: the energy storage battery unit control system has the advantages that various functions of real-time data processing analysis, graphical display, data storage, power scheduling distribution, historical data query, equipment control, measurement, parameter adjustment, various signal alarms and the like of the energy storage battery unit are achieved, and the energy storage converter PCS and the battery management system BMS are controlled.
It should be noted that, for the invention, the energy storage monitoring system EMS, the energy storage converter PCS and the battery management system BMS communicate with each other pairwise and send a control instruction, and the energy storage monitoring system is designed by software, the energy storage monitoring system EMS can receive information of the battery management system BMS through the energy storage converter PCS and also can receive information of the energy storage converter PCS through the battery management system BMS, and similarly, the energy storage converter PCS can receive information of the energy storage monitoring system EMS through the battery management system BMS. Thus, with the present invention, more reliable system operation can be achieved through such redundant communication control designs. When one communication line among the EMS, the PCS and the BMS is abnormal, information can still be forwarded by other nodes, the purpose of system safety control is achieved, and the stability and the reliability of the whole battery energy storage system are improved.
In the invention, in a concrete implementation, a protocol adopted by a communication link between the battery management system BMS and the energy storage converter PCS comprises: at least one of CAN protocol, MODBUS RTU protocol based on 485 interface and MODBUS TCP protocol based on TCP/IP.
In the present invention, in a specific implementation, referring to fig. 2, another trunk contact is connected between the battery management system BMS and the energy storage converter PCS, so as to increase the response speed and perform redundancy protection.
In the present invention, in a specific implementation, referring to fig. 1, a communication link between the battery management system BMS and the energy storage monitoring system EMS employs a MODBUS TCP protocol based on TCP/IP.
Aiming at the battery energy storage system, the invention utilizes the existing physical channel to invent a novel communication redundancy protection link.
Compared with the prior art, the energy storage system with the safety protection function provided by the invention has the following beneficial effects:
1. for the invention, the main improvements in the data transmission and control of the energy storage battery management unit BMS and the energy storage converter PCS include: firstly, the energy storage battery management unit BMS transmits real-time data of the energy storage battery unit to a PCS through a CAN protocol, a 485 interface-based MODBUS RTU protocol or a TCP/IP-based MODBUS TCP protocol; for the invention, the PCS can integrate data to obtain and display the running state of the energy storage battery unit; thirdly, the PCS can send a control command to the BMS according to the upper layer command; and fourthly, a dry contact signal can be added between the PCS and the BMS, so that the response speed is improved.
2. For the data transmission and control of the energy storage battery management unit BMS and the energy storage monitoring system EMS, the main improvement comprises the following steps: the method comprises the following steps that firstly, an energy storage battery management unit BMS directly transmits real-time data of an energy storage battery unit to an EMS through an MODBUS TCP protocol; second, the EMS can send control instructions to PCS and BMS through MODBUS TCP protocol.
Therefore, compared with the prior art, the invention provides a safety protection mechanism based on the battery energy storage system, the invention integrates the energy storage battery system (comprising the battery management system BMS and the energy storage battery unit), the energy storage converter PCS and the energy storage monitoring system EMS, increases the communication protection link of the energy storage system, and the EMS, the PCS and the BMS are all provided with communication links, thereby reducing the internal communication faults of the battery energy storage system, improving the stability and the reliability of the battery energy storage system and the whole power supply system, and being convenient to implement.
Compared with the prior art, the energy storage system with the safety protection function provided by the invention can meet the comprehensive processing of mass real-time monitoring data, has a redundant safety management channel, improves the abnormal rapid processing capability, effectively improves the safety and reliability of the battery energy storage system, and has important practical application significance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an energy storage system with safety protection function which characterized in that, includes energy storage battery system, energy storage converter PCS and energy storage monitored control system EMS, wherein:
the energy storage battery system comprises an energy storage battery unit and a battery management system BMS;
the battery management system BMS is respectively connected with the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS, and communication control links are arranged among the energy storage battery unit, the energy storage converter PCS and the energy storage monitoring system EMS;
the energy storage converter PCS is connected with the energy storage monitoring system EMS, and a communication control link is arranged between the energy storage converter PCS and the energy storage monitoring system EMS.
2. The energy storage system with safety protection function as claimed in claim 1, wherein the energy storage battery unit is used for uploading real-time operation information thereof to the battery management system BMS through the CAN bus and receiving a control command sent by the battery management system BMS.
3. The energy storage system with safety protection function as claimed in claim 1, wherein the energy storage battery management unit BMS is used for monitoring, evaluating and protecting the electronic equipment set of the battery running state.
4. The energy storage system with safety protection function as claimed in claim 1, wherein the energy storage converter PCS is used for receiving real-time operation information of the energy storage battery unit transmitted by the battery management system BMS and receiving control commands sent by the battery management system BMS.
5. The energy storage system with safety protection function as claimed in claim 1, wherein the energy storage converter PCS is used as a connecting device between an external power grid and the energy storage battery unit for realizing alternating current-direct current bidirectional conversion and charging and discharging the energy storage battery unit.
6. The energy storage system with safety protection as claimed in claim 5, wherein the energy storage converter PCS is connected to an external power grid, and is configured to convert AC power from the external power grid into DC power, then charge the energy storage battery unit, and convert the DC power outputted from the energy storage battery unit into AC power for being released to the external power grid.
7. The energy storage system with safety protection function as claimed in claim 1, wherein the energy storage monitoring system EMS is a data acquisition and monitoring control system for receiving the dispatching command of the external power grid and receiving the real-time operation information transmitted from the energy storage battery unit through the battery management system BMS to implement the monitoring management of the energy storage battery unit.
8. The energy storage system with safety protection function as claimed in claim 1, wherein the protocol adopted by the communication link between the battery management system BMS and the energy storage converter PCS comprises: at least one of CAN protocol, MODBUS RTU protocol based on 485 interface and MODBUS TCP protocol based on TCP/IP.
9. The energy storage system with safety protection as claimed in claim 1, wherein there is another dry contact connection between the battery management system BMS and the energy storage converter PCS.
10. The energy storage system with safety protection function as claimed in claim 1, wherein the communication link between the battery management system BMS and the energy storage monitoring system EMS adopts MODBUS TCP protocol based on TCP/IP.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525602A (en) * | 2020-04-30 | 2020-08-11 | 蜂巢能源科技有限公司 | Energy storage system and energy storage device |
| CN111641261A (en) * | 2020-05-08 | 2020-09-08 | 上海宝准电源科技有限公司 | High-reliability energy storage power station communication architecture and method thereof |
| CN112290572A (en) * | 2020-10-20 | 2021-01-29 | 傲普(上海)新能源有限公司 | Safety control method of energy storage system |
| CN112531828A (en) * | 2020-11-26 | 2021-03-19 | 许继集团有限公司 | Electrochemical energy storage power station BMS cooperative control system and method |
| CN112994081A (en) * | 2021-02-01 | 2021-06-18 | 华电国际电力股份有限公司天津分公司 | Multi-stage wide area management and control electric energy storage management integrated system and method |
| CN113561829A (en) * | 2021-06-30 | 2021-10-29 | 福建时代星云科技有限公司 | Machine learning-based storage and charging station control method and terminal |
| CN113690978A (en) * | 2021-08-20 | 2021-11-23 | 远景能源有限公司 | Battery management system |
| CN114710428A (en) * | 2022-04-26 | 2022-07-05 | 广州智光储能科技有限公司 | Communication protection method, device and system applied to energy storage system |
| CN116072998A (en) * | 2023-03-06 | 2023-05-05 | 宁德时代新能源科技股份有限公司 | Communication method, device, system, equipment, medium and product of energy storage system |
| CN116131311A (en) * | 2023-04-07 | 2023-05-16 | 深圳市首航新能源股份有限公司 | Energy storage system and protection method thereof |
| CN116742809A (en) * | 2023-08-08 | 2023-09-12 | 江苏天合储能有限公司 | Energy storage protection device and energy storage battery system |
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| CN113561829A (en) * | 2021-06-30 | 2021-10-29 | 福建时代星云科技有限公司 | Machine learning-based storage and charging station control method and terminal |
| CN113690978A (en) * | 2021-08-20 | 2021-11-23 | 远景能源有限公司 | Battery management system |
| CN114710428A (en) * | 2022-04-26 | 2022-07-05 | 广州智光储能科技有限公司 | Communication protection method, device and system applied to energy storage system |
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| CN116072998A (en) * | 2023-03-06 | 2023-05-05 | 宁德时代新能源科技股份有限公司 | Communication method, device, system, equipment, medium and product of energy storage system |
| CN116072998B (en) * | 2023-03-06 | 2023-08-11 | 宁德时代新能源科技股份有限公司 | Communication method, device, system, equipment, medium and product of energy storage system |
| CN116131311A (en) * | 2023-04-07 | 2023-05-16 | 深圳市首航新能源股份有限公司 | Energy storage system and protection method thereof |
| CN116742809A (en) * | 2023-08-08 | 2023-09-12 | 江苏天合储能有限公司 | Energy storage protection device and energy storage battery system |
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