CN116054423A - Energy storage system and energy storage power station - Google Patents
Energy storage system and energy storage power station Download PDFInfo
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- CN116054423A CN116054423A CN202310345693.7A CN202310345693A CN116054423A CN 116054423 A CN116054423 A CN 116054423A CN 202310345693 A CN202310345693 A CN 202310345693A CN 116054423 A CN116054423 A CN 116054423A
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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
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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Abstract
The application discloses an energy storage system and an energy storage power station, wherein the energy storage system comprises N electric cabinets, and at least one electric box is arranged in each electric cabinet; the battery monitoring device is arranged corresponding to the electric box; each main control device is arranged in the corresponding electric cabinet and is communicated with each battery monitoring device in the corresponding electric cabinet through a CAN network; the first total control device and the second total control device are respectively communicated with each main control device through a first optical fiber Ethernet, and are redundant. The energy storage system realizes redundant design of the total control devices through the first total control device and the second total control device, so that when one of the first total control device and the second total control device fails, the energy storage system can be automatically switched to the other total control device, and the system is ensured to have high communication reliability.
Description
Technical Field
The application relates to the technical field of energy storage power stations, in particular to an energy storage system and an energy storage power station.
Background
Along with the rapid development of energy storage industry, the energy storage power station plays an increasingly important role in the power source side, the power grid side and the load side of a power system, and the communication stability of the energy storage power station plays an important role in the normal operation of the power station.
In the related art, the energy storage power station adopts CAN (Controller Area Network ) networking to transmit data, but the technical scheme has low communication reliability.
Disclosure of Invention
In view of the above, the present application provides an energy storage system and an energy storage power station, which can improve the communication reliability of the energy storage power station.
In a first aspect, the present application provides an energy storage system, where the energy storage power station includes N electrical cabinets, each electrical cabinet is provided with at least one electrical box, where N is an integer greater than 1; the battery monitoring device is arranged corresponding to the electric box; each main control device is arranged in the corresponding electric cabinet and is communicated with each battery monitoring device in the corresponding electric cabinet through a CAN network; the first total control device and the second total control device are respectively communicated with each main control device through a first optical fiber Ethernet, and are redundant.
In the technical scheme of the embodiment of the application, each main control device is arranged in a corresponding electric cabinet, and is communicated with each battery monitoring device in the corresponding electric cabinet through a CAN network, and the first main control device and the second main control device which are mutually backed up are respectively communicated with each main control device through a first optical fiber Ethernet. Therefore, the system realizes redundant communication design of the total control devices through the first total control device and the second total control device, namely, the system can be automatically switched to the other total control device to operate when one of the first total control device and the second total control device fails, so that high communication reliability of the system is realized.
In some embodiments, when any one of the N master control devices fails to communicate with both the first master control device and the second master control device, a fault broadcast signal is sent to the remaining master control devices of the N master control devices via the first fiber ethernet. Thus, when any one of the main control devices cannot communicate with the first main control device and the second main control device, the other main control devices can make corresponding protection work after receiving the fault broadcast signals by sending the fault broadcast signals to the other main control devices.
In some embodiments, the energy storage system further comprises a first master control box, a second master control box and N master control boxes, wherein the N master control boxes are correspondingly arranged in the N electric cabinets, the N master control devices are correspondingly arranged in the N master control boxes, the first master control device is arranged in the first master control box, and the second master control device is arranged in the second master control box. So, main control device sets up in the master control case, and first total controlling means sets up in first total controlling means, and second total controlling means sets up in the total controlling means of second, and its communication line is connected to first optic fibre ethernet through corresponding controlling means to avoid main control device, first total controlling means and the communication link between the total controlling means of second expose in abominable electromagnetic environment, prevent that the communication from losing.
In some embodiments, the energy storage system further comprises N fire protection modules, wherein each fire protection module is disposed within a respective electrical cabinet and communicates with a master control device within the respective electrical cabinet via a CAN network. Therefore, the fire-fighting module is arranged in the corresponding electric cabinet, the fire-fighting communication cable is prevented from being directly exposed to the electromagnetic environment, and the conditions of missing report, false report and the like are avoided.
In a second aspect, the present application provides an energy storage power station comprising the energy storage system described above.
In the technical scheme of the embodiment of the application, based on the energy storage system, when one of the first total control device and the second total control device in the energy storage system fails, the other total control device is adopted to ensure high reliability of communication, and in addition, the first total control device, the second total control device and each main control device are reliably communicated by adopting optical fibers, so that no packet loss in communication under a strong electromagnetic environment can be ensured, and the communication reliability of the energy storage power station is further improved.
In some embodiments, the energy storage power station further comprises an energy management system, wherein the first total control device and the second total control device respectively communicate with the energy management system through a second optical fiber ethernet and respectively communicate with the energy management system through a third optical fiber ethernet, and the second optical fiber ethernet and the third optical fiber ethernet are redundant. Therefore, when one of the second optical fiber Ethernet and the third optical fiber Ethernet fails, the energy management system can still communicate with the first total control device and the second total control device through the other one, so that the system communication stability is ensured.
In some embodiments, the energy storage power station further comprises a water cooling system in communication with the energy management system via a second fiber optic ethernet and a third fiber optic ethernet, respectively.
In some embodiments, the water cooling system sends the cooling information to the energy management system via the second fiber optic ethernet or the third fiber optic ethernet such that the energy management system issues the cooling information to the first overall control device or the second overall control device. In this way, the first total control device and the second total control device are communicated with the energy management system and the water cooling system by adopting optical fibers so as to meet the high-low potential isolation requirement.
In some embodiments, the energy storage power station further comprises an insulation detection module, and the insulation detection module performs fiber point-to-point communication with the first overall control device and the second overall control device respectively. The insulation detection module can realize point-to-point communication with the first total control device and the second total control device through optical fibers, high-low voltage isolation is realized, and high reliability of communication is ensured.
In some embodiments, the energy storage power station further comprises a sub-module control device, and the sub-module control device performs fiber point-to-point communication with the first overall control device and the second overall control device, respectively. In this way, the first total control device and the second total control device are communicated with the submodule control device through optical fibers so as to improve the electromagnetic interference resistance.
In some embodiments, the energy storage systems are multiple, each connected to a second fiber optic ethernet for communication with an energy management system in the energy storage power station, and also connected to a third fiber optic ethernet for communication with the energy management system, wherein the second fiber optic ethernet and the third fiber optic ethernet are redundant to each other. In this way, the power exchange station can ensure normal communication through one of the second optical fiber Ethernet and the third optical fiber Ethernet when the other optical fiber Ethernet fails.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of an energy storage battery management system according to the related art;
FIG. 2 is a schematic diagram of an energy storage system according to some embodiments of the present application;
FIG. 3 is a schematic diagram of an energy storage system according to some embodiments of the present application;
FIG. 4 is a schematic structural diagram of an energy storage power station according to some embodiments of the present application;
FIG. 5 is a schematic diagram of a communication architecture of a control system for a modular multilevel converter device according to the related art.
Reference numerals:
the fire-fighting system comprises an electric cabinet 10, an electric box 11, a fire-fighting module 12, a battery monitoring device 20, a main control device 30, a first main control device 40, a second main control device 50, an energy management system 60, a water cooling system 70, an insulation detection module 80, a submodule control device 90, an energy storage power station 100 and an energy storage system 110.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
In the related art, the architecture of the energy storage battery management system (BMS, battery Management System) is shown in fig. 1, and mainly comprises: the electric box, the main control box and the master control box are in a three-layer structure, and the main control box and the electric box and the master control box are networked through CAN communication; the BMS system and the PCS (Power Conversion System, energy storage converter), the water-cooling unit and the fire-fighting system are communicated through CAN, and Modbus-TCP (Modbus protocol-Transmission Control Protocol, modbus communication protocol based on transmission control protocol) is used for Ethernet communication between the BMS and the EMS (Energy Management System ).
In the above technical solution, the following disadvantages exist:
1. the high-voltage cascade energy storage BMS system is in an operation environment of hundreds or even thousands of IGBT (Insulated Gate Bipolar Transistor ) high-frequency switches, the EMC environment is very bad, and the traditional CAN communication CAN not meet the requirement of high-reliability transmission;
2. in a large-capacity energy storage system, the number of parallel connection of the electric cabinets is increased continuously, the number is increased from 10 to more than 30, meanwhile, the number of serial/parallel connection electric cores in a single electric cabinet is also increased continuously, and the data transmission amount is increased continuously. And CAN networks cannot meet the requirements of transmission distance and communication bandwidth.
3. The high-voltage cascade energy storage BMS system is at high potential, the EMS and the water cooling unit are at low potential, and the traditional CAN communication and the Ethernet communication based on twisted pair cannot meet the requirement of high insulation and voltage resistance.
In order to solve the problem that energy storage power station communication reliability is low, the application provides an energy storage system, and every main control device sets up in corresponding electric cabinet, and communicates through the CAN network between each battery monitoring device in the corresponding electric cabinet, and each other is the first total controlling means and the second total controlling means of backup and communicates through first optic fibre ethernet between each main controlling means respectively. Therefore, the energy storage system realizes redundant communication design of the total control devices through the first total control device and the second total control device, namely, the system can be automatically switched to the other total control device to operate when one of the first total control device and the second total control device fails, so that high communication reliability of the system is realized.
According to some embodiments of the present application, referring to fig. 2, the energy storage system includes N electrical cabinets 10, each electrical cabinet 10 having at least one electrical box 11 disposed therein, wherein N is an integer greater than 1; a battery monitoring device 20 provided in correspondence with the electric box 11; n main control devices 30, each main control device 30 is disposed in a corresponding electric cabinet 10, and communicates with each battery monitoring device 20 in the corresponding electric cabinet 10 through a CAN network; the first overall control device 40 and the second overall control device 50, the first overall control device 40 and the second overall control device 50 respectively communicate with each main control device 30 through a first optical fiber ethernet, and the first overall control device 40 and the second overall control device 50 are redundant.
An energy storage system is a system of devices that performs the storage, conversion, and release of recyclable electrical energy by means of electrochemical cells or electromagnetic energy storage media. The energy storage system is provided with N electric cabinets 10, a plurality of electric boxes 11 are respectively arranged in each electric cabinet 10, and a plurality of energy storage battery cores are stored in each electric box 11. The energy storage system is provided with a battery monitoring device 20 corresponding to each electric box 11, and is used for acquiring data such as the temperature, the voltage, the equalization condition, the alarm and the like of the battery cells in the corresponding electric boxes 11 through the battery monitoring device 20. The energy storage system is further provided with a main control device 30 corresponding to each electric cabinet 10, and the main control device 30 receives the detection result of each battery monitoring device 20 in the corresponding electric cabinet 10 and sends a corresponding control command. The first overall control device 40 and the second overall control device 50 of the energy storage system are configured to communicate with all the main control devices 30 in the energy storage power station, so as to obtain data parameters of the electric box 11 in the energy storage power station, and issue corresponding control commands. Further, when the first overall control device 40 and the second overall control device 50 work normally, the energy storage system can designate one of the overall control devices to perform instruction interaction, the other overall control device only performs data synchronization, and when one of the overall control devices fails, the system can automatically switch to the other overall control device to perform instruction interaction, so that the communication reliability of the energy storage system is ensured. For example, the first overall control device 40 performs instruction interaction, the second overall control device 50 performs data synchronization only, and when the first overall control device 40 fails, the energy storage system can be automatically switched to the second overall control device 50 to interact with the main control device 30.
Illustratively, referring to fig. 2, the energy storage system includes N electrical cabinets 10, respectively represented by electrical cabinet 1, electrical cabinets 2, … …, and electrical cabinet N, and M electrical boxes 11 are disposed in each electrical cabinet 10, respectively represented by electrical cabinet 1, electrical cabinet 2, … …, and electrical cabinet M. The corresponding energy storage system further comprises n×m battery detection devices 20, N main control devices 30, a first total control device 40 and a second total control device 50. The N electric cabinets 10 are provided with M battery monitoring devices 20, respectively, and are represented by a battery monitoring device 1, battery monitoring devices 2, … …, and a battery monitoring device M. Taking the electric cabinet 1 as an example, the battery monitoring device 1 monitors the electric box 1, the battery monitoring device 2 monitors the electric box 2, and so on, and the battery monitoring device M monitors the electric box M. In each electric cabinet 10, the battery monitoring device 20 respectively sends the data of the cell temperature, voltage, equalization, alarm and the like of the corresponding electric box 11 obtained by monitoring to the main control device 30 through the CAN network. The M main control devices 30 transmit the received data to the first and second main control devices 40 and 50 through the first optical ethernet.
The main control device 30 and the battery monitoring device 20 of the energy storage system are located in the corresponding electric cabinet 10, and are communicated with each other by adopting a CAN network in the electric cabinet 10, specifically, the main control device 30 is communicated with the battery monitoring device 20 through the CAN network so as to acquire data of temperature, voltage, equalization, alarm and the like of the battery cell and send a control command. The first total control device 40 and the second total control device 50 are arranged outside the electric cabinet 10, the main control device 30 is respectively communicated with the first total control device 40 and the second total control device 50 through the first optical fiber Ethernet, the occurrence of the condition of communication packet loss in a strong electromagnetic environment can be effectively prevented based on reliable optical fiber communication, meanwhile, the requirements of increased transmission data volume, transmission distance and communication bandwidth caused by the continuous increase of serial/parallel electric cores in a single electric cabinet can be met based on the continuous increase of the parallel number of the electric cabinets through the optical fiber Ethernet. In addition, the energy storage system can adopt the first total control device 40 and the second total control device 50 to carry out redundant communication design on the total control devices, namely, when the two total control devices of the energy storage system work normally, one of the two total control devices can be adopted to carry out instruction interaction, the other total control device only carries out a working mode of data backup, and when one of the two total control devices fails, the energy storage system can be automatically switched to the other standby total control device so as to have high communication reliability.
In some embodiments of the present application, when any one of the N master control apparatuses 30 cannot communicate with both the first master control apparatus 40 and the second master control apparatus 50, a fault broadcast signal is sent to the remaining master control apparatuses 30 of the N master control apparatuses 30 through the first optical fiber ethernet.
The main control device 30 cannot transmit data to the first and second main control devices 40 and 50, and cannot receive signals from the first and second main control devices 40 and 50, and can determine by transmitting and receiving test signals. For example, the system sets the main control device 30 and the first and second main control devices 40 and 50 to send test signals to each other every certain time interval, and if the main control device 30 does not receive the first test signals sent by the first and second main control devices 40 and 50 and the first and second main control devices 40 and 50 also do not receive the second test signals sent by the main control device 30 beyond the preset time, the main control device 30 and the first and second main control devices 40 and 50 are considered to be unable to communicate.
Illustratively, taking an example that the main control device 1 of the N main control devices 30 in the energy storage system cannot communicate with the first main control device 40 and the second main control device 50, the main control device 1 generates a fault broadcast signal and sends the fault broadcast signal to the main control device 2, the main control devices 3, … …, and the main control device N.
In the above embodiment, when any one of the main control devices 30 cannot communicate with two main control devices, a fault broadcast is sent to other main control devices 30, and after receiving the fault broadcast signal, the main control device 30 of each electric cabinet can make corresponding protection work, such as signal isolation, so as to avoid the influence on the normal operation of the energy storage system.
In some embodiments of the present application, the energy storage system further includes a first total control box, a second total control box, and N main control boxes, where the N main control boxes are correspondingly disposed in the N electric cabinets 10, and the N main control devices 30 are correspondingly disposed in the N main control boxes, the first total control device 40 is disposed in the first total control box, and the second total control device 50 is disposed in the second total control box.
That is, the main control device 30 is disposed in the main control box of the corresponding electric cabinet 10, and the communication line of the main control device 30 is led out through the main control box and connected to the first optical fiber ethernet. The first total control device 40 is disposed in the first total control box, and a communication line of the first total control device 40 is led out through the first total control box and is connected to the first optical fiber ethernet. The second master control device 50 is disposed in the second master control box, and a communication line of the second master control device 50 is led out through the second master control box and is connected to the first optical fiber ethernet. Thus, the main control box communicates with the first main control box and the second main control box respectively through the first optical fiber Ethernet, so that the communication among the corresponding main control device 30, the first main control device 40 and the second main control device 50 is realized, and the communication loss caused by the fact that the communication link is exposed in a severe electromagnetic environment is avoided.
In some embodiments of the present application, referring to fig. 3, the energy storage system further includes N fire modules 12, wherein each fire module 12 is disposed within a respective electrical cabinet 10 and communicates with a master control device 30 within the respective electrical cabinet 10 via a CAN network.
The fire control module 10 is used for acquiring real-time fire control parameters in the electric cabinet through the fire control sensing device and outputting corresponding alarm signals. The alarm signals may include alarm level signals and fault signals, and the alarm level signals may be classified according to the emergency degree, development state and possible hazard degree of the emergency, for example: the alarm level signal is divided into a primary alarm and a secondary alarm, wherein the primary alarm is more serious.
The energy storage system includes N electrical cabinets 10, respectively represented by electrical cabinet 1, electrical cabinets 2, … …, and electrical cabinet N, N fire-fighting modules 12 are respectively represented by fire-fighting module 1, fire-fighting module 2, … …, and fire-fighting module N, each electrical cabinet 10 is respectively and correspondingly provided with one fire-fighting module 12, and the fire-fighting module 12 detects through the fire-fighting module 12 provided in the electrical cabinet 10, and sends the alarm signal of detection output to the main control device 30 of the electrical cabinet 10 through the CAN network. Taking the electric cabinet 1 as an example, the fire-fighting module 1 detects the electric cabinet 1 in real time and establishes communication with the main control device 1 through a CAN network, and the main control device 1 acquires an alarm signal in the electric cabinet 1 through the fire-fighting module 1 and sends the acquired alarm signal to the first overall control device 40 and the second overall control device 50 through a first optical fiber Ethernet.
The fire-fighting modules 12 are arranged in each electric cabinet 10, so that the condition that fire-fighting communication cables are directly exposed to an electromagnetic environment and report missing or false is avoided.
From this, main control unit 30, battery monitoring devices 20 and fire control module 12 are located electric cabinet 10, and inside adopts the CAN network to communicate, and main control unit 30 communicates with battery monitoring devices 20, fire control module 12 through the CAN network promptly, and main control unit 30 communicates with battery monitoring devices 20 through the CAN network, acquires electric core temperature, voltage, balanced, alarm signal, and main control unit 30 communicates with fire control module 12 through the CAN network, acquires fire control sensing device's alarm level and fault signal in the electric cabinet.
According to some embodiments of the present application, referring to fig. 4, an energy storage power station 100 includes an energy storage system 110 as described above.
As shown in conjunction with fig. 3 and 4, in some embodiments of the present application, the energy storage power station 100 further includes an energy management system 60, where the first overall control device 40 and the second overall control device 50 respectively communicate with the energy management system 60 through a second optical fiber ethernet and respectively communicate with the energy management system 60 through a third optical fiber ethernet, and the second optical fiber ethernet and the third optical fiber ethernet are redundant.
Illustratively, the first overall control device 40 communicates with the energy management system 60 via a second fiber optic ethernet and a third fiber optic ethernet, respectively, and the second overall control device 50 communicates with the energy management system 60 via a second fiber optic ethernet and a third fiber optic ethernet, respectively. When one of the second optical fiber ethernet and the third optical fiber ethernet fails, the energy management system 60 may use the other optical fiber ethernet to communicate with the first overall control device 40 and the second overall control device 50, so as to improve the reliability of communication.
In some embodiments of the present application, the energy storage power station 100 further includes a water cooling system 70, the water cooling system 70 in communication with the energy management system 60 via a second fiber optic ethernet and a third fiber optic ethernet, respectively.
The water cooling system 70 is used to perform heat exchange with the battery cells in the electric box 11, so as to ensure that the telecommunication temperature is in the optimal temperature range. The water cooling system 70 transmits information such as the water outlet temperature, pressure, alarm, etc. of the water cooling system 70 to the energy management system 60 through the second optical fiber ethernet and the third optical fiber ethernet. The energy management system 60 can ensure the reliability of communication with the water cooling system 70 based on the second optical fiber network and the third optical fiber network which are redundant to each other, and in addition, the energy management system 60 and the water cooling system 70 use optical fiber communication, and have high insulation and voltage resistance characteristics.
In some embodiments of the present application, the water cooling system 70 sends the cooling information to the energy management system 60 through the second fiber optic ethernet or the third fiber optic ethernet so that the energy management system 60 issues the cooling information to the first overall control device 40 or the second overall control device 50.
For example, taking the water cooling system 70 using the second optical fiber ethernet to send the cooling information to the energy management device, the current working total control device of the energy storage system is taken as the first total control device 40, after the water cooling system 70 sends the obtained cooling information (such as the information of the water outlet temperature, the pressure, the alarm, etc.) to the energy management system 60 through the second optical fiber ethernet, the energy management system 60 sends the received cooling information to the first total control device 40 through the second optical fiber ethernet or the third optical fiber ethernet, and issues the temperature control command to the water cooling system 70 according to the battery temperature and the temperature control strategy.
In this way, the first and second main control devices 40 and 50 communicate with the energy management system 60 and the water cooling system 70 using optical fibers, and have high insulation and voltage withstanding characteristics, and simultaneously meet the high and low potential isolation requirements. In addition, referring to fig. 3, the first overall control device 40, the second overall control device 50, the energy management system 60, the water cooling system 70, and the fire module 12 are linked, and a cascade energy storage function can be realized through communication.
In some embodiments of the present application, the energy storage power station 100 further includes an insulation detection module 80, where the insulation detection module 80 performs fiber-optic point-to-point communication with the first overall control device 40 and the second overall control device 50, respectively.
The insulation performance of the electric cabinet output electric signal is obtained in real time through the insulation detection module 80 and is sent to the first total control device 40 and the second total control device 50, so that the safety and reliability of the energy storage power station are greatly improved. In this embodiment, the first overall control device 40 and the second overall control device 50 communicate with the insulation detection module 80 through optical fibers to isolate the high voltage signal detected by the insulation detection module 80.
In some embodiments of the present application, the energy storage power station 100 further includes a sub-module control device 90, where the sub-module control device 90 is in fiber-optic point-to-point communication with the first overall control device 40 and the second overall control device 50, respectively.
In the related art, referring to fig. 5, a communication architecture of a modular multilevel converter control system in an energy storage power station is shown, a valve base control device (VBC) includes 1 DSP (Digital Signal Processing ) board card, M optical fiber communication boards, and the DSP board card and the optical fiber communication boards communicate with each other through a backplane bus, and optical fibers are used to perform point-to-point communication between the optical fiber communication boards and N sub-module control devices (SMC). In fig. 5, TX denotes a signal transmitting end of an optical fiber communication board card, and RX denotes a signal receiving end of the optical fiber communication board card, wherein each optical fiber communication board card includes one signal transmitting end and a plurality of signal receiving ends, and the plurality of signal receiving ends are respectively denoted by RX1, RX2, … …, and RXN.
In the technical scheme, the valve base control device and the main control device have inconsistent functions and communication requirements and cannot be directly moved to the main control device. Meanwhile, the optical fiber communication cost of the technical scheme is high, and the requirement of the high-voltage energy storage system cannot be met.
To solve the above-mentioned problem, the present application discloses a technical solution that the submodule control device 90 performs fiber point-to-point communication with the first overall control device 40 and the second overall control device 50 respectively. Specifically, the first overall control device 40 and the second overall control device 50 send signals such as a battery State of Charge SOC (State of Charge), an operating State, an alarm signal, a maximum Charge-discharge current, a Charge-discharge power correction coefficient, etc. to the sub-module control device 90 based on the fiber-to-fiber communication, and the sub-module control device 90 receives the above information and sends signals such as a power-on/off command, an alarm, a required Charge-discharge current, etc. to the first overall control device 40 and the second overall control device 50 based on the established fiber-to-fiber communication.
In this embodiment, based on the above energy storage system, a new planning design is performed on the communication mode of the sub-module control device 90, compared with the technical solution in the related art, the link of optical fiber communication is greatly reduced, the communication cost is reduced, and meanwhile, the first total control device 40 and the second total control device 50 and the sub-module control device 90 adopt optical fiber point-to-point communication, so as to improve the electromagnetic interference resistance.
In some embodiments of the present application, the energy storage systems 110 are multiple, and each energy storage system 110 is connected to a second fiber optic ethernet for communication with the energy management system 60 in the energy storage power station 100, and is also connected to a third fiber optic ethernet for communication with the energy management system 60, wherein the second fiber optic ethernet and the third fiber optic ethernet are redundant to each other. In this way, the energy storage power station 100 can ensure normal communication through one of the second and third optical fiber ethernet networks when the other optical fiber ethernet network fails. The plurality of energy storage systems 110 means that the number of the energy storage systems 110 is greater than or equal to two.
It should be noted that, for the description of the energy storage power station, please refer to the description of the energy storage system.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. An energy storage system, the energy storage system comprising:
the electric cabinet comprises N electric cabinets, wherein at least one electric box is arranged in each electric cabinet, and N is an integer greater than 1;
the battery monitoring device is arranged corresponding to the electric box;
each main control device is arranged in the corresponding electric cabinet and is communicated with each battery monitoring device in the corresponding electric cabinet through a CAN network;
the first total control device and the second total control device are respectively communicated with each main control device through a first optical fiber Ethernet, and are redundant.
2. The energy storage system of claim 1, wherein when any one of the N master control devices is unable to communicate with both the first master control device and the second master control device, a fault broadcast signal is sent to the remaining master control devices of the N master control devices via the first fiber optic ethernet.
3. The energy storage system of claim 1, further comprising a first master control box, a second master control box, and N master control boxes, the N master control boxes being disposed in the N electrical cabinets, wherein the N master control devices are disposed in the N master control boxes, the first master control device being disposed in the first master control box, and the second master control device being disposed in the second master control box.
4. The energy storage system of claim 1, further comprising N fire modules, wherein each fire module is disposed within a respective electrical cabinet and communicates with a master control device within the respective electrical cabinet via the CAN network.
5. An energy storage power station comprising an energy storage system according to any one of claims 1-4.
6. The energy storage power plant of claim 5, further comprising an energy management system, wherein the first and second overall control devices communicate with the energy management system via a second optical fiber ethernet and with the energy management system via a third optical fiber ethernet, respectively, the second and third optical fiber ethernet being redundant to each other.
7. The energy storage power plant of claim 6, further comprising a water cooling system in communication with the energy management system via the second and third fiber optic ethernet networks, respectively.
8. The energy storage power plant of claim 7, wherein the water cooling system transmits cooling information to the energy management system via the second or third fiber ethernet such that the energy management system issues the cooling information to the first or second overall control device.
9. The energy storage power station of claim 8, further comprising an insulation detection module in fiber point-to-point communication with the first and second overall control devices, respectively.
10. The energy storage power station of claim 9, further comprising a sub-module control device in fiber point-to-point communication with the first and second overall control devices, respectively.
11. The energy storage power station of claim 5, wherein the energy storage systems are each connected to a second fiber optic ethernet for communication with an energy management system in the energy storage power station and to a third fiber optic ethernet for communication with the energy management system, wherein the second fiber optic ethernet and the third fiber optic ethernet are redundant to each other.
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