Communication architecture for long-distance monitoring of centralized energy storage system based on optical fiber

Abstract

The utility model discloses a kind of communication architecture of centralized energy storage system based on optical fiber long-distance monitoring, comprising: long-distance power distribution central control room area and container energy storage area;Container energy storage area includes fiber optic transceiver, data switch and several container energy storage subsystem, each container energy storage subsystem is communicated with the data switch by ethernet, the data switch is connected with fiber optic transceiver by communication line;The long-distance power distribution central control room area includes fiber optic transceiver, EMS energy scheduling management system and host computer, the fiber optic transceiver in the long-distance power distribution central control room area is connected with the fiber optic transceiver in container energy storage area by optical fiber communication link;The fiber optic transceiver in the long-distance power distribution central control room area is communicated with EMS energy scheduling management system by ethernet.Solved the instability of conventional communication, data packet loss and other influence system operation problems in the long-distance transmission process of existing conventional centralized energy storage system.

Description

TECHNICAL FIELD

[0001] The utility model belongs to energy storage technical field especially relates to a kind of communication architecture based on optical fiber remote monitoring centralized energy storage system. BACKGROUND

[0002] Energy storage system refers to the energy of the form such as electric energy is stored through different media, and is released when needed. Energy storage device composed of energy storage element and grid access device composed of power electronic device become two parts of energy storage system. Energy storage device realizes the storage, release or fast power exchange of energy. Grid access device realizes the energy two-way transmission and conversion between energy storage device and grid, realizes power peak shaving, energy optimization, improves power supply reliability and power system stability and other functions.

[0003] With the change of global energy structure, large-scale centralized energy storage power station is expanded and constructed, and large and super large centralized energy storage power station is built in open desert area, such as gobi sand, beach island and barren hill, where crops do not grow but solar energy resources are rich. Since it needs to be connected to public grid, the distance between general power distribution control room and energy storage container position is far, and conventional communication mode is not friendly to long-distance data transmission, so it is necessary to establish remote monitoring based on optical fiber to solve the problem of data transmission. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of communication architecture based on optical fiber remote monitoring centralized energy storage system, and the energy storage system communication architecture of the utility model solves the problem that multiple network data transmission exists in long-distance transmission process of existing traditional centralized energy storage system, conventional communication exists instability, data packet loss and other influences system operation problems.

[0005] The utility model achieves the purpose by the following technical scheme:

[0006] A kind of communication architecture based on optical fiber remote monitoring centralized energy storage system, the energy storage system communication architecture includes: remote power distribution control room area and container energy storage area;

[0007] The container energy storage area includes fiber optic transceiver, data switch and several container energy storage subsystems, each container energy storage subsystem is communicated with the data switch by Ethernet, and the data switch is connected with fiber optic transceiver by communication line;

[0008] The remote power distribution control room area includes fiber optic transceiver, EMS energy scheduling management system and host computer, and the fiber optic transceiver in the remote power distribution control room area is connected with the fiber optic transceiver in container energy storage area by optical fiber communication link;

[0009] The optical fiber transceiver in the remote power distribution control room area communicates with the EMS energy scheduling management system through Ethernet, and the EMS energy scheduling management system communicates with the upper computer through Ethernet.

[0010] According to a preferred embodiment, the container energy storage area is provided with an optical fiber transceiver A and an optical fiber transceiver B, and the remote power distribution control room area is provided with an optical fiber transceiver A' and an optical fiber transceiver B',

[0011] The optical fiber transceiver A is connected to the optical fiber transceiver A' through an optical fiber, forming a communication link A.

[0012] The optical fiber transceiver B is connected to the optical fiber transceiver B' through an optical fiber, forming a communication link B.

[0013] According to a preferred embodiment, the upper computer, the EMS energy scheduling management system and the Web terminal are connected, and data is uploaded to the cloud server for archiving through access to the external network or access to the 4G router.

[0014] According to a preferred embodiment, the container energy storage subsystem includes an energy storage converter PCS, a three-level BMS and a plurality of battery clusters; each battery cluster connected in parallel is connected in communication with the three-level BMS through a CAN bus, and the three-level BMS is connected in communication with the energy storage converter PCS through a CAN bus.

[0015] According to a preferred embodiment, the battery cluster is composed of a plurality of battery boxes connected in series and a high-voltage box.

[0016] According to a preferred embodiment, the first-level BMS of each battery box in the battery cluster is connected to the second-level BMS in the high-voltage box in the battery cluster through daisy chain communication; the second-level BMS in each battery cluster is connected in communication with the three-level BMS through a CAN bus.

[0017] According to a preferred embodiment, each battery cluster is connected in parallel through direct current input and connected to the PCS direct current side, and the PCS alternating current side is connected to the power grid and the load.

[0018] According to a preferred embodiment, the container energy storage subsystem further includes a plurality of fire extinguishing units and air conditioning units, and each fire extinguishing unit and air conditioning unit communicates with the BMS through RS485 mode using ModBusRTU communication protocol.

[0019] According to a preferred embodiment, the container energy storage subsystem further includes a temperature control system, and the temperature control system communicates with the BMS through RS485 mode using ModBusRTU communication protocol.

[0020] The foregoing main scheme and each further selected scheme of the utility model can be freely combined to form multiple schemes, which are all the schemes that can be adopted and claimed by the utility model. The person skilled in the art can understand multiple combinations according to the prior art and common knowledge after understanding the utility model scheme, which are all the technical schemes claimed by the utility model, and are not listed exhaustively here.

[0021] The utility model discloses the beneficial effect that:

[0022] The utility model discloses energy storage system communication architecture solves the multiple network data transmission of existing conventional centralized energy storage system in the process of long-distance transmission, and the instability of conventional communication, data packet loss and other problems affect system operation and other problems.

[0023] The utility model discloses energy storage system communication architecture container energy storage area and long-distance power distribution central control room area adopt optical fiber communication, and optical fiber uses light pulse along optical line transmission information, replaces and uses electric pulse along cable transmission information. The transmitter is the starting point of information to optical line at one end of the system. The coded electronic pulse information received by the transmitter comes from the copper cable, and then the information is processed and converted into equivalent coded light pulse. Strong anti-interference, zero packet loss rate, no matter how complex the strong electricity is around the optical fiber, the transmission speed is always consistent. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the energy storage system communication architecture schematic view of the utility model;

[0025] Figure 2 It is the centralized energy storage system operation logic schematic view of the utility model;

[0026] Figure 3 It is each container energy storage subsystem parallel operation logic diagram;

[0027] Figure 4 It is the main loop system structure diagram of container energy storage subsystem. DETAILED DESCRIPTION

[0028] The embodiments of the utility model are described below through specific concrete examples, and the person skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in the specification. The utility model can also be implemented or applied through another different concrete embodiment, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0029] It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of a certain item need be provided in subsequent drawings once the item has been defined in one drawing.

[0030] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, and is merely for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are merely used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "provision", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In addition, the utility model points out that, in the utility model, if the specific structures, connection relationships, position relationships, power source relationships and the like are not specifically written, the structures, connection relationships, position relationships, power source relationships and the like involved in the utility model are all known by those skilled in the art on the basis of the prior art without creative labor.

[0034] Example 1

[0035] Reference Figures 1 to 3 As shown in the figure, a remote monitoring centralized energy storage system communication architecture based on optical fiber is shown, the energy storage system communication architecture comprises: a remote power distribution control room area and a container energy storage area. The energy storage system of the utility model is usually used for peak clipping or battery priority scenes.

[0036] The container energy storage area includes a fiber optic transceiver, a data switch and a plurality of container energy storage subsystems, each container energy storage subsystem communicates with the data switch through Ethernet, and the data switch is connected with the fiber optic transceiver through a communication line; the remote power distribution control room area includes a fiber optic transceiver, an EMS energy scheduling management system and an upper computer, and the fiber optic transceiver in the remote power distribution control room area is connected with the fiber optic transceiver in the container energy storage area through a fiber optic communication link; the fiber optic transceiver in the remote power distribution control room area communicates with the EMS energy scheduling management system through Ethernet, and the EMS energy scheduling management system communicates with the upper computer through Ethernet.

[0037] The energy storage converter PCS and the BMS send data from the internal client through Ethernet, convert the data into optical signals through the data switch and the fiber optic transceiver, transmit the data from the container energy storage area to the remote power distribution control room area through the fiber optic communication link, convert the optical signals and then access the EMS energy scheduling management system.

[0038] The EMS energy scheduling management system can access the data of each container energy storage subsystem in real time and quickly, when a plurality of container energy storage subsystems are counted, the EMS energy scheduling management system can establish a model according to the reported system SOC, voltage, current and other data, and calibrate the charging and discharging power for each container energy storage subsystem through internal algorithms, realize power control through droop control, that is, artificially set the droop characteristics of the output voltage frequency with respect to the active power and the output voltage amplitude with respect to the reactive power, and then realize reasonable division of labor and distribution of each container energy storage subsystem to bring maximum operation efficiency to the entire energy storage power station.

[0039] Preferably, the container energy storage area is provided with a fiber optic transceiver A and a fiber optic transceiver B, the remote power distribution control room area is provided with a fiber optic transceiver A' and a fiber optic transceiver B', the fiber optic transceiver A is connected with the fiber optic transceiver A' through an optical fiber to form a communication link A, and the fiber optic transceiver B is connected with the fiber optic transceiver B' through an optical fiber to form a communication link B.

[0040] The system uses two fiber optic communication links to simultaneously transmit and receive data to the EMS energy scheduling management system, the A link serves as the main channel, the A link is always working when the system link is completely normal, the EMS energy scheduling management system monitors whether the A link is normal in real time, if the A link reaches the problem judgment condition, the EMS energy scheduling management system automatically and seamlessly switches to the B link for data transmission and system control, so that the system can still normally complete important work such as data acquisition and transmission when there is a problem with one optical link.

[0041] Preferably, the upper computer, EMS energy scheduling management system and Web terminal are connected, data is uploaded to the cloud server for archiving through accessing the external network or accessing the 4G router, so that the cloud access local and control functions are realized.

[0042] Preferably, the container energy storage subsystem comprises an energy storage converter PCS, a three-level BMS and a plurality of battery clusters; each battery cluster in parallel is in communication connection with the three-level BMS through a CAN bus, and the three-level BMS is in communication connection with the energy storage converter PCS through the CAN bus.

[0043] Preferably, the container energy storage subsystem further comprises a plurality of fire-fighting units and air conditioning units, and each fire-fighting unit and air conditioning unit is in communication with the BMS through RS485 mode using ModBusRTU communication protocol.

[0044] Preferably, the container energy storage subsystem further comprises a temperature control system, and the temperature control system is in communication with the BMS through RS485 mode using ModBusRTU communication protocol.

[0045] The utility model solves the problems of multiple network data transmission, instability of conventional communication, data packet loss and the like in the process of long-distance transmission of the existing traditional centralized energy storage system, uses optical pulses to transmit information along an optical line to replace the use of electric pulses to transmit information along a cable, and solves the problems of data transmission and system control in system operation.

[0046] Reference Figure 4 As shown in the figure, the main loop system structure diagram of the container energy storage subsystem is shown.

[0047] A plurality of series-connected battery boxes and a high-voltage box are connected in series to form a battery cluster. The first-level BMU in the battery box communicates with the second-level BMS (i.e. Figure 1 The different battery cluster main loops are connected in parallel to form a plurality of battery clusters.

[0048] The second-level BMS (i.e. Figure 1 The BCU in the system) in the plurality of battery clusters communicates with the third-level BMS in the system through a CAN bus, and the third-level BMS in the system communicates with the PCS through the CAN bus.

[0049] The several battery clusters are arranged at different positions in the box, are connected in parallel through direct current input and are connected to the PCS direct current side.

[0050] The fire-fighting system mainly monitors combustible gas, temperature, smoke and other information in the container to ensure normal operation of the internal equipment; the temperature control system mainly monitors the temperature and humidity of the container to control the air conditioning unit to adjust the temperature and humidity in the system.

[0051] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A communication architecture for long distance monitoring of centralized energy storage systems based on optical fiber, characterized in that, The energy storage system communication architecture comprises a remote power distribution control room area and a container energy storage area. The container energy storage area comprises a fiber transceiver, a data switch and a plurality of container energy storage subsystems, each container energy storage subsystem is in communication with the data switch through Ethernet, and the data switch is connected with the fiber transceiver through a communication line. The remote power distribution control room area comprises a fiber transceiver, an EMS energy scheduling management system and a host computer, and the fiber transceiver in the remote power distribution control room area is connected with the fiber transceiver in the container energy storage area through a fiber communication link. The fiber transceiver in the remote power distribution control room area is in communication with the EMS energy scheduling management system through Ethernet, and the EMS energy scheduling management system is in communication with the host computer through Ethernet.

2. The fiber-based long distance monitoring centralized energy storage system communication architecture of claim 1, wherein, The container energy storage area is provided with a fiber transceiver A and a fiber transceiver B, and the remote power distribution control room area is provided with a fiber transceiver A' and a fiber transceiver B', The fiber transceiver A is connected with the fiber transceiver A' through a fiber, forming a communication link A. The fiber transceiver B is connected with the fiber transceiver B' through a fiber, forming a communication link B.

3. The fiber-based long distance monitoring centralized energy storage system communication architecture of claim 1, wherein, The host computer, the EMS energy scheduling management system and the Web terminal are connected, and data is uploaded to a cloud server for archiving and recording by accessing an external network or a 4G router.

4. The fiber-based long distance monitoring centralized energy storage system communication architecture of claim 1, wherein, The container energy storage subsystem comprises an energy storage converter PCS, a three-level BMS and a plurality of battery clusters. Each battery cluster connected in parallel is connected with the three-level BMS through a CAN bus, and the three-level BMS is connected with the energy storage converter PCS through a CAN bus.

5. The fiber-based long distance monitoring centralized energy storage system communication architecture of claim 4, wherein, The battery cluster is composed of a plurality of battery boxes connected in series and a high-voltage box.

6. The fiber-based long-range monitoring centralized energy storage system communication architecture of claim 5, wherein, The first-level BMS of each battery box in the battery cluster is connected to the second-level BMS in the high-voltage box in the battery cluster through a daisy chain communication mode; the second-level BMS in each battery cluster is connected with the three-level BMS through a CAN bus.

7. The fiber-based long distance monitoring centralized energy storage system communication architecture of claim 4, wherein, Each battery cluster is connected to the PCS DC side after being connected in parallel through DC input, and the PCS AC side is connected with the power grid and the load.

8. The fiber-based long distance monitoring centralized energy storage system communication architecture of claim 4, wherein, The container energy storage subsystem further comprises a plurality of fire-fighting units and air conditioning units, each of which is in communication with the BMS through RS485 mode using ModBusRTU communication protocol.

9. The fiber-based long-range monitoring centralized energy storage system communication architecture of claim 8, wherein, The container energy storage subsystem further comprises a temperature control system, which is in communication with the BMS through RS485 mode using ModBusRTU communication protocol.

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