Novel EMS energy management system and communication system

Abstract

The utility model discloses a novel EMS energy management system and a communication system, the EMS energy management system comprises a plurality of energy storage containers, a control unit and an EMS, each energy storage container is internally provided with an energy storage module, a plurality of energy storage converters, a first unit switch and a second unit switch, one energy storage container is defined as a first energy storage container, a first unit switch of the first energy storage container is connected with first unit switches of other energy storage containers, and a second unit switch of the first energy storage container is connected with second unit switches of other energy storage containers; the control unit comprises a first controller, a second controller, a main network switch and a standby network switch; and the EMS is connected with the main network switch and the standby network switch. Wiring is convenient, and communication is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage power station communication, and in particular to a novel EMS energy management system and communication system. Background Art

[0002] In practical applications, energy storage systems usually include multiple energy storage containers. The power of a single energy storage container is limited, so multiple energy storage containers are often used to supply power to the outside. These multiple energy storage containers are controlled by a controller. In practical applications, each energy storage container includes multiple energy storage inverters. The multiple energy storage inverters in each energy storage container are controlled by the same controller. The controller then communicates with the EMS so that the EMS can issue power scheduling instructions to each energy storage inverter. In this case, each EMS needs to communicate and connect with dozens of energy storage inverters separately and issue instructions to dozens of energy storage inverters separately. Not only is the communication time too long, but when the number of energy storage containers and the number of energy storage inverters are large, it is easy to make errors due to too many wiring. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide a new EMS energy management system and communication system, which has convenient wiring and stable communication.

[0004] In order to achieve the above-mentioned purpose, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical Solution 1. The utility model provides a new EMS energy management system, including multiple energy storage containers, each of which is equipped with an energy storage module, a plurality of energy storage converters, a first unit switch and a second unit switch, wherein the first unit switch is connected to each energy storage converter and is used to transmit the first data of each energy storage converter, and the second unit switch is connected to each energy storage converter and is used to transmit the second data of each energy storage converter, and the priority of the first data is higher than the second data; one of the energy storage containers is defined as a first energy storage container, the first unit switch of the first energy storage container is connected to the first unit switch of other energy storage containers, and the second unit switch of the first energy storage container is connected to the second unit switch of other energy storage containers; and a control unit, which includes a first controller, a second controller, a main network switch and a backup network switch, the first controller and the second controller are both connected to the main network switch and the backup network switch, the first controller is connected to a first unit switch of the first energy storage container, and the second controller is connected to a second unit switch of the first energy storage container; and an EMS, which is connected to the main network switch and the backup network switch.

[0006] Based on technical solution one, there is also provided a technical solution two. In technical solution two, the control unit further includes a fiber optic connector, and both the main network switch and the backup network switch communicate with the EMS through the fiber optic connector.

[0007] Based on technical solution 2, there is also provided a technical solution 3, in which the control unit is placed in the first energy storage container.

[0008] Based on Technical Solution Three, there is also a Technical Solution Four. In Technical Solution Four, each energy storage container is also configured with a main battery management system and a backup battery management system; the main battery management system of each energy storage container is connected to the main network switch, and the backup battery management system of each energy storage container is connected to the backup network switch.

[0009] Based on technical solution four, there is also a technical solution five. In technical solution five, the first data is transmitted using the IEC61850 / GOOSE protocol, and the second data is transmitted using the IEC61850 / MMS protocol or the Modbus TCP protocol.

[0010] Based on Technical Solution Five, there is also Technical Solution Six. In Technical Solution Six, each energy storage container is also configured with a main network serial port server, a backup network serial port server, an air conditioning system and a measurement and control device. The main network serial port server of each energy storage container is connected to the main network switch, and the backup network serial port server of each energy storage container is connected to the backup network switch; the air conditioning system and the measurement and control device of each energy storage container are connected to the corresponding main network serial port server and backup network serial port server.

[0011] Based on technical solution six, technical solution seven is also provided. Technical solution seven also includes a router, a first end of the router is connected to the main network switch and the backup network switch via Ethernet, and a second end is wirelessly connected to the cloud server or the smart terminal.

[0012] Based on Technical Solution Seven, Technical Solution Eight is also provided. In Technical Solution Eight, RS485 communication is adopted between the air-conditioning system and the measurement and control device and the main network serial port server and the backup network serial port server, and Modbus TCP protocol is adopted between the main network serial port server and the main network switch and between the backup network serial port server and the backup network switch.

[0013] Based on technical solution eight, there is also provided technical solution nine, in which the first data is control information of the energy storage inverter, and the second data is analog data quantity and digital state quantity information of each energy storage inverter.

[0014] Technical Solution 10. The utility model also provides a communication system, including a main server and several new EMS energy management systems as described in any one of Technical Solutions 1 to 9, wherein the EMS is connected to the main server.

[0015] From the above description of the utility model and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the utility model and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In the technical solution 1, the first data of each energy storage inverter is gathered in the first unit switch of the first energy storage container, and the second data is gathered in the second unit switch of the first energy storage container. Therefore, the control unit does not need to be connected to each energy storage inverter separately, but only needs to be connected to the first unit switch and the second unit switch in the first energy storage container; therefore, in practical applications, each energy storage inverter of each energy storage container can be connected to the first unit switch and the second unit switch, the first unit switches of each energy storage container can be connected to each other, and the second unit switches can be connected to each other, and then the first unit switch and the second unit switch of the first energy storage container can be connected to the control unit, so that the entire communication line is simpler and it is not easy to make mistakes when wiring multiple devices for communication.

[0017] In addition, in the present technical solution, the first data with a higher priority and the second data with a relatively lower priority are transmitted to the main network switch and the backup network switch through two different transmission links, which can prevent the transmission of important information from being affected by the transmission of massive amounts of less important information and causing congestion, thereby ensuring the transmission reliability of important information; wherein, a main transmission link for the first data is formed between the first unit switch, the first controller and the main network switch, a backup transmission link for the first data is formed between the first unit switch, the first controller and the backup network switch, a main transmission link for the second data is formed between the second unit switch, the second controller and the main network switch, and a backup transmission link for the second data is formed between the second unit switch, the second controller and the backup network switch. When the main transmission link fails, it can also be dynamically transmitted to the backup transmission link, thereby realizing dual network redundancy and ensuring efficient and safe operation of the energy management system.

[0018] In the second technical solution, the optical fiber connector establishes the communication between the main network switch, the backup network switch and the EMS, which shortens the communication time and can greatly shorten the time for the EMS to issue power instructions.

[0019] In technical solution three, the control unit is placed in the first energy storage container, which is more convenient for wiring.

[0020] In technical solution four, the data transmission between the main battery management system and the backup battery management system can achieve dual network redundancy, ensuring the efficient and safe operation of the energy management system.

[0021] In technical solution five, the first data is transmitted using the IEC61850 / GOOSE protocol, and the second data is transmitted using the IEC61850 / MMS protocol or the Modbus TCP protocol, which is beneficial for making the first data have a higher transmission efficiency than the second data.

[0022] In technical solution six, the data transmitted by the main network serial port server and the backup network serial port server are redundant and more stable during operation; among them, the air-conditioning system and the measurement and control device are connected to the first and backup network serial port servers, so that the entire energy management system can integrate all electrical equipment of the energy storage container, which is conducive to the realization of automation and intelligent control of the energy storage container.

[0023] In Technical Solution 7, the function of remotely accessing the main network switch and the backup network switch can be achieved through a router. In actual applications, user authority management can be used to meet the control and monitoring needs of users at different levels.

[0024] In technical solution eight, RS485 communication is adopted between the air conditioning system and the measurement and control device and the first and backup network serial port servers, and Modbus TCP protocol is adopted between the first and backup network serial port servers and the first unit switch and the second unit switch, which makes communication simpler.

[0025] In technical solution nine, the first data is the control information of the energy storage inverter, and the second data is the analog data quantity and digital state quantity information of each energy storage inverter, which is conducive to the monitoring and control of the energy storage inverter by EMS.

[0026] Technical solution 10 has the technical advantages of any one of technical solutions 1 to 9. At the same time, the data of each new EMS energy management system can be directly imported into the main server, which is convenient for realizing system expansion and the control of each EMS by the main server. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a novel EMS energy management system according to an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of a communication system according to an embodiment of the present utility model.

[0030] Description of main reference numerals:

[0031] EMS energy management system 100; energy storage container 200; energy storage inverter 10; first unit switch 21; second unit switch 22; main network serial port server 31; backup network serial port server 32; air conditioning system 33; measurement and control device 34; main battery management system 41; backup battery management system 42; control unit 300; first controller 51; second controller 52; main network switch 61; backup network switch 62; optical fiber connector 70; EMS 80; router 90; main server 400. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0034] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0035] See also Figure 1 , Figure 1 The novel EMS energy management system 100 is shown, including a plurality of energy storage containers 200 , a control unit 300 , an EMS 80 and a router 90 .

[0036] Each energy storage container 200 is configured with an energy storage module (not shown in the figure), a plurality of energy storage inverters 10, a first unit switch 21, a second unit switch 22, a main network serial port server 31, a backup network serial port server 32, an air conditioning system 33, a measurement and control device 34, a main battery management system 41 and a backup battery management system 42.

[0037] The energy storage converter (PCS) 10 is used to control the charging and discharging process of the energy storage module. It is connected between the energy storage module and the power grid to store the power grid's electrical energy into the energy storage module or output the energy of the energy storage module to the power grid system. The main and backup battery management systems (BMS main network 41, BMS backup network 42) are used to detect the status of the battery and control and manage the battery status, such as the voltage, current, temperature, battery charge status and fault signals of the energy storage module. The air conditioning system 33 is used to achieve temperature regulation of the energy storage container. The measurement and control device 34 is used to collect and measure various electrical and non-electrical quantities, control, protect and digitally display circuit breakers, etc.

[0038] The first unit switch 21 is connected to each energy storage inverter 10 and is used to transmit the first data of each energy storage inverter 10, and the second unit switch 22 is connected to each energy storage inverter 10 and is used to transmit the second data of each energy storage inverter 10, and the priority of the first data is higher than the second data; one of the energy storage containers 200 is defined as the first energy storage container 200, the first unit switch 21 of the first energy storage container 200 is connected to the first unit switches 21 of other energy storage containers 200, and the second unit switch 22 of the first energy container 200 is connected to the second unit switches 22 of other energy storage containers 200. Figure 1 Two energy storage containers are shown in the figure, but it should be understood that the number of energy storage containers is set according to the required power and is not limited to two. Among them, the first data is the control information of the energy storage converter 10, such as the active power control instruction and reactive power control instruction of the energy storage converter 10, and the second data is the analog data volume and digital state quantity information of each energy storage converter 10, such as current, voltage and frequency. It can be understood that for the data transmission part, the improvement of this embodiment does not lie in the content of the first data and the second data itself, nor in the transceiver logic of the corresponding sending and receiving ends. The existing EMS energy management system itself has the transceiver process of sending control instructions and reporting operation data, and generally speaking, the priority of sending control instructions is higher than the priority of reporting operation data.

[0039] The air conditioning system 33 and the measurement and control device 34 of each energy storage container 200 are connected to the main network serial port server 31 and the backup network serial port server 32, and RS485 communication is used between the air conditioning system 33 and the measurement and control device 34 and the main network serial port server 31 and the backup network serial port server 32.

[0040] The control unit 300 includes a first controller 51, a second controller 52, a main network switch 61, a backup network switch 62 and an optical fiber connector 70. The first controller 51 and the second controller 52 are both connected to the main network switch 61 and the backup network switch 62. The first controller 51 is connected to a first unit switch 21 of the first energy storage container 200, and the second controller 52 is connected to a second unit switch 22 of the first energy storage container 200. The main battery management system 41 of each energy storage container 200 is connected to the main network switch 61, and the backup battery management system 42 of each energy storage container 200 is connected to the backup network switch 62. The main network serial port server 31 of each energy storage container 200 is connected to the main network switch 61, and the backup network serial port server 32 of each energy storage container 200 is connected to the backup network switch 62. It can be understood that for the controller part, the improvement of this embodiment does not lie in the control processing logic of the controller, but only in the connection structure of each controller with its upper device and lower device.

[0041] In this embodiment, both the main network switch 61 and the backup network switch 62 communicate with the EMS 80 through the optical fiber connector 70. The optical fiber connector is a fiber splicing box, which has a shorter communication time and can greatly shorten the time for the EMS 80 to issue power instructions. The EMS 80 receives the first data and the second data and distributes the power scheduling instruction. The power scheduling instruction is preferentially issued to each energy storage converter 10 through the main transmission link of the first data.

[0042] In this embodiment, the control unit 300 is placed in the first energy storage container 200 in the form of a box, which is more convenient for wiring.

[0043] In this embodiment, the first data is transmitted using the IEC61850 / GOOSE protocol, and the second data is transmitted using the IEC61850 / MMS protocol or the Modbus TCP protocol to achieve a higher transmission efficiency for the first data than for the second data. The Modbus TCP protocol is used between the serial port server of the first energy storage container 200 and the first unit switch 21 and the second unit switch 22. The Modbus TCP protocol is used between the main network serial port server 31 and the main network switch 61, and between the backup network serial port server 32 and the backup network switch 62, and the communication is simple.

[0044] In this embodiment, the first data of each energy storage converter 10 is gathered in the first unit switch 21 of the first energy storage container 200, and the second data is gathered in the second unit switch 22 of the first energy storage container 200. Therefore, the control unit 300 does not need to be connected to each energy storage converter 10 separately, but only needs to be connected to the first unit switch 21 and the second unit switch 22 in the first energy storage container 200. Therefore, in practical applications, each energy storage converter 10 of each energy storage container 200 can be connected to the first unit switch 21 and the second unit switch 22, the first unit switches 21 of each energy storage container 200 are connected to each other, and the second unit switches 22 are connected to each other, and then the first unit switch 21 and the second unit switch 22 of the first energy storage container 200 are connected to the control unit 300. The entire communication line is simpler, and it is not easy to make mistakes when performing communication wiring for multiple devices.

[0045] In this embodiment, the first data with a higher priority and the second data with a relatively lower priority are transmitted to the main network switch 61 and the backup network switch 62 through two different transmission links, which can prevent the transmission of important information from being affected by the transmission of a large amount of secondary important information and causing congestion, thereby ensuring the transmission reliability of important information; wherein, the main transmission link of the first data is formed between the first unit switch 21, the first controller 51 and the main network switch 61, the backup transmission link of the first data is formed between the first unit switch 21, the first controller 51 and the backup network switch 62, the main transmission link of the second data is formed between the second unit switch 22, the second controller 52 and the main network switch 61, and the backup transmission link of the second data is formed between the second unit switch 22, the second controller 52 and the backup network switch 62. When the main transmission link fails, it can also be dynamically used as a backup transmission link, realizing dual network redundancy, and ensuring the efficient and safe operation of the energy management system. Similarly, the data of the main battery management system 41 and the backup battery management system 42 can realize dual network redundancy, ensuring the efficient and safe operation of the energy management system. The data transmitted by the main network serial port server 31 and the backup network serial port server 32 are redundant and more stable during operation.

[0046] The first end of the router 90 is connected to the main network switch 61 and the backup network switch 62 via Ethernet, and the second end is wirelessly connected to the cloud server or smart terminal. The router 90 can realize the function of remote access to the main network switch 61 and the backup network switch 62. In actual applications, user authority management can be used to meet the control and monitoring needs of users of different levels.

[0047] The utility model also provides a communication system, including a main server 400 and several new EMS energy management systems 100 in the above-mentioned embodiments. EMS80 is connected to the main server 400, which has the technical advantages of the above-mentioned embodiments. At the same time, the data of each new EMS energy management system 100 can be directly imported into the main server 400, which is convenient for realizing system expansion and the control of each EMS by the main server 400.

[0048] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A novel EMS energy management system (100), characterized in that: include A plurality of energy storage containers (200), each energy storage container (200) being configured with an energy storage module, a plurality of energy storage converters (10), a first unit switch (21) and a second unit switch (22), the first unit switch (21) being connected to each energy storage converter (10) and used for transmitting first data of each energy storage converter (10), the second unit switch (22) being connected to each energy storage converter (10) and used for transmitting second data of each energy storage converter (10), the first data having a higher priority than the second data; defining one of the energy storage containers (200) as a first energy storage container (200), the first unit switch (21) of the first energy storage container (200) being connected to the first unit switch (21) of other energy storage containers (200), the second unit switch (22) of the first energy storage container (200) being connected to the second unit switch (22) of other energy storage containers (200); and A control unit (300), comprising a first controller (51), a second controller (52), a main network switch (61) and a backup network switch (62), wherein the first controller (51) and the second controller (52) are both connected to the main network switch (61) and the backup network switch (62), the first controller (51) is connected to a first unit switch (21) of a first energy storage container (200), and the second controller (52) is connected to a second unit switch (22) of the first energy storage container (200); and The EMS (80) is connected to the main network switch (61) and the backup network switch (62).

2. A novel EMS energy management system (100) as claimed in claim 1, characterized in that: The control unit (300) further comprises an optical fiber connector (70), and the main network switch (61) and the backup network switch (62) both communicate with the EMS (80) via the optical fiber connector (70).

3. A novel EMS energy management system (100) as claimed in claim 2, characterized in that: The control unit (300) is placed in the first energy storage container (200).

4. A novel EMS energy management system (100) as claimed in claim 3, characterized in that: Each energy storage container (200) is also provided with a main battery management system (41) and a backup battery management system (42); the main battery management system (41) of each energy storage container (200) is connected to a main network switch (61), and the backup battery management system (42) of each energy storage container (200) is connected to a backup network switch (62).

5. A novel EMS energy management system (100) as claimed in claim 4, characterized in that: The first data is transmitted using the IEC61850 / GOOSE protocol, and the second data is transmitted using the IEC61850 / MMS protocol or the Modbus TCP protocol.

6. A novel EMS energy management system (100) as claimed in claim 5, characterized in that: Each energy storage container (200) is further configured with a main network serial port server (31), a backup network serial port server (32), an air conditioning system (33) and a measurement and control device (34); the main network serial port server (31) of each energy storage container (200) is connected to the main network switch (61), and the backup network serial port server (32) of each energy storage container (200) is connected to the backup network switch (62); and the air conditioning system (33) and the measurement and control device (34) of each energy storage container (200) are connected to the corresponding main network serial port server (31) and backup network serial port server (32).

7. A novel EMS energy management system (100) as claimed in claim 6, characterized in that: It also includes a router (90), wherein a first end of the router (90) is connected to a main network switch (61) and a backup network switch (62) via Ethernet, and a second end of the router (90) is wirelessly connected to a cloud server or a smart terminal.

8. A novel EMS energy management system (100) as claimed in claim 7, characterized in that: The air conditioning system (33) and the measurement and control device (34) use RS485 communication with the main network serial port server (31) and the backup network serial port server (32), and the Modbus TCP protocol is used between the main network serial port server (31) and the main network switch (61) and between the backup network serial port server (32) and the backup network switch (62).

9. A novel EMS energy management system (100) as claimed in claim 8, characterized in that: The first data is control information of the energy storage converter (10), and the second data is analog data quantity and digital state quantity information of each energy storage converter (10).

10. A communication system, characterized in that: It comprises a main server (400) and a plurality of new EMS energy management systems (100) as claimed in any one of claims 1 to 9, wherein the EMS (80) is connected to the main server (400).

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