CN217279346U - Controller of modularized battery energy storage system based on fast Ethernet - Google Patents

Controller of modularized battery energy storage system based on fast Ethernet Download PDF

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Publication number
CN217279346U
CN217279346U CN202221301367.3U CN202221301367U CN217279346U CN 217279346 U CN217279346 U CN 217279346U CN 202221301367 U CN202221301367 U CN 202221301367U CN 217279346 U CN217279346 U CN 217279346U
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controller
energy storage
fast ethernet
storage system
optical fiber
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李勇琦
凌志斌
陈满
李毓烜
汪志强
朱焕杰
胡振恺
王珺
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Shanghai Jiaotong University
Peak and Frequency Regulation Power Generation Co of China Southern Power Grid Co Ltd
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Shanghai Jiaotong University
Peak and Frequency Regulation Power Generation Co of China Southern Power Grid Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]

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Abstract

The utility model provides a modularization battery energy storage system's controller based on quick ethernet, include: the whole machine controller is positioned on the upper layer; the middle layer controller is positioned on the middle layer and is connected with the whole machine controller; submodule module control ware, submodule module control ware is located the lower floor, with the intermediate level controller is connected, the utility model discloses adopt quick ethernet and the transmission that optic fibre realized high-speed, high isolation with the control information flow of energy storage system converter, the complete machine controller adopts general controller, and system function development is convenient, and scalability and maintainability are strong.

Description

Controller of modularized battery energy storage system based on fast Ethernet
Technical Field
The utility model relates to a battery energy storage technical field specifically relates to a modularization battery energy storage system's controller based on quick ethernet.
Background
In the field of battery energy storage, a modular converter is a very promising topological structure which can be used in high-voltage and high-capacity occasions. Because the potentials of the submodules of the modular converter are different, different submodule controllers and submodule batteries are at different potentials. Therefore, different from the common two-level and three-level current converters which adopt a single integrated controller, the controller of the modular current converter adopts a master-slave structure, and the slave controllers are at different electric potentials, so that the modular current converter has the characteristics of distribution and mutual isolation. The master controller and the slave controller adopt optical fiber communication. At present, a main controller of the modularized battery energy storage converter adopts a framework of DSP + FPGA, the DSP is responsible for control algorithm operation, and the FPGA is responsible for modulation and communication. And the slave controller adopts an FPGA to realize the functions of communication, driving and protection. The method has high programming difficulty, complex design and verification, long development period and inconvenient operation of field operation and maintenance personnel.
SUMMERY OF THE UTILITY MODEL
To the defects in the prior art, the utility model aims at providing a modularization battery energy storage system's controller based on quick ethernet.
According to an aspect of the utility model, a provide a modularization battery energy storage system's controller based on quick ethernet, include:
the whole machine controller is positioned on the upper layer;
the middle layer controller is positioned on the middle layer and is connected with the whole machine controller;
and the sub-module controller is positioned at the lower layer and is connected with the middle layer controller.
Preferably, the complete machine controller is a universal controller.
Preferably, the universal controller is a universal controller for converter control, and issues a control information stream to the middle layer controller, and the universal controller collects management information streams collected by the middle layer controller.
Preferably, the number of the intermediate layer controllers is 3. Each phase is 1, and the three phases are 3 in total.
Preferably, each of the middle layer controllers includes:
the fast Ethernet transformer is connected with the complete machine controller;
the fast Ethernet protocol chip is connected with the fast Ethernet transformer;
the FPGA is connected with the fast Ethernet protocol chip;
the optical fiber receiving interface is connected with the FPGA;
and the optical fiber transmitting interface is connected with the FPGA.
Preferably, the FPGA comprises:
one end of the sequential logic interface is connected with the fast Ethernet protocol chip, and the other end of the sequential logic interface is connected with the optical fiber receiving interface;
and one end of the PWM generator is connected with the sequential logic interface, and the other end of the PWM generator is connected with the optical fiber sending interface.
Preferably, the energy storage sub-module is in optical fiber communication with one intermediate layer controller, and each energy storage sub-module is configured with one sub-module controller.
Preferably, each sub-module controller includes a sub-module control board,
each submodule controller comprises an optical fiber sending interface and an optical fiber receiving interface which are respectively and correspondingly connected with the optical fiber receiving interface and the optical fiber sending interface in the middle-layer controller.
Preferably, each intermediate layer controller is configured with N optical fiber transceiving pairs, and communicates with N sub-module controllers by adopting a 1: N star communication structure.
Compared with the prior art, the utility model discloses following beneficial effect has:
the embodiment of the utility model provides an in a modularization battery energy storage system's controller based on quick ethernet, adopt quick ethernet and optic fibre to realize the transmission of high-speed, high isolation with the control information flow of energy storage system converter, the complete machine controller adopts general controller, and system function development is convenient, and scalability and maintainability are strong.
In the embodiment of the utility model, the universal controller realizes the flexible expansion of the calculation force of the controller, and the plurality of FPGA intermediate layers realize the expansion of the number of controllable sub-modules;
the embodiment of the utility model provides an in controller of modularization battery energy storage system based on quick ethernet adopts quick ethernet bus to realize the decoupling zero of power extension and control quantity ability extension is calculated in the control of modularization battery energy storage system's controller.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a controller architecture of a fast ethernet based modular battery energy storage system in an implementation of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific embodiments. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that numerous variations and modifications could be made by those skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
The utility model provides an embodiment, a modularization battery energy storage system's controller based on quick ethernet, include: complete machine controller, intermediate level controller and submodule piece controller. The whole machine controller is positioned on the upper layer; the middle layer controller is positioned in the middle layer and is connected with the whole machine controller; the sub-module controller is positioned at the lower layer and is connected with the middle layer controller. Wherein, the whole machine controller and the middle layer controller together form a main controller.
In a preferred embodiment of the present invention, 1 complete machine controller is composed of 1 general controller. In addition, every N energy storage system sub-modules are in optical fiber communication with 1 middle-layer controller, and N is generally between 20 and 50; each energy storage system submodule is provided with 1 submodule controller, and each energy storage system submodule controller comprises 1 submodule control panel.
The power control and the balance control of the energy storage system are realized in the whole machine controller; the modulation function of the main circuit drive is realized in the middle layer controller by the modulation of a PWM generator; and the sub-module controller completes the functions of instruction decoding and power module information collection and uploading.
In another embodiment of the present invention, the middle layer controller includes a fast ethernet transformer, a fast ethernet protocol chip, an FPGA and N groups of optical fiber interfaces, wherein the N groups of optical fiber interfaces correspond to the N energy storage sub-modules.
The fast Ethernet transformer is connected with a universal controller in the complete machine controller;
the fast Ethernet protocol chip is correspondingly connected with the fast Ethernet transformer; one end of the FPGA is connected with the fast Ethernet protocol chip, and the other end of the FPGA is connected with a group of optical fiber interfaces.
The FPGA comprises a sequential logic interface and a PWM generator, the sequential logic interface is connected with the fast Ethernet protocol chip, the optical fiber receiving interface is connected with the sequential logic interface, and the optical fiber sending interface is connected with the PWM generator.
Each energy storage system submodule is in optical fiber communication with one submodule controller, each submodule controller comprises a submodule control panel, and each submodule control panel corresponds to one middle-layer controller; each sub-module controller comprises N groups of optical fiber sending interfaces and optical fiber receiving interfaces which are respectively and correspondingly connected with the N groups of optical fiber receiving interfaces and the optical fiber sending interfaces in the middle layer controller.
The control process of this embodiment specifically includes: the general controller responsible for the control methods such as power control, equalization control and the like of the energy storage system sends control data such as power, equalization and the like to the middle layer controller, the middle layer controller receives the control data sent by the upper layer, calculates a modulation value driven by a main circuit of the sub-module and sends the modulation value to the N sub-module controllers through the optical fiber interface, the sub-module controllers receive the modulation value through the optical fiber interface to generate corresponding PWM pulse signals and collect information such as voltage, current and the like of the sub-module and upload the information to the middle layer controller through the optical fiber interface, and the middle layer controller receives sub-module related information returned by the sub-module controllers through the optical fiber interface and sends the information to the general controller responsible for the control methods such as power control, equalization control and the like of the energy storage system; the middle layer controller receives an instruction of the general controller for reading the sub-module battery data and sends the instruction to the N sub-module controllers through the optical fiber interface, the sub-module controllers receive the instruction sent by the middle layer controller and send the instruction for reading the battery data to the sub-module battery management system according to a communication protocol of the sub-module battery management system, the sub-module battery management system receives the instruction and uploads the related battery data to the sub-module controllers according to the communication protocol, the sub-module controllers receive and read the related battery data and send the data to the middle layer controller through the optical fiber interface, and the middle layer controller sends the data to the upper layer general controller.
In another embodiment of the present invention, a fast ethernet bus is used for communication between the overall controller and the middle layer controller, the general controller is a fast ethernet master station, wherein the general controller controlled by the converter issues the sub-module modulation values obtained by the power control strategy and the balance control strategy to the middle layer controller through the fast ethernet bus; the intermediate layer controller realizes the function of the 1-path fast Ethernet slave station, receives N sub-module modulation values from a universal controller controlled by a converter through the fast Ethernet, generates corresponding PWM pulse control signals through a PWM generator realized by an FPGA, and uploads a power module and a battery state from a sub-module controller.
Each middle layer controller is provided with N optical fiber transceiving pairs and is communicated with N sub-module control boards by adopting a 1: N star-shaped communication structure. The middle layer controller sends the coded switching signal, soft start signal, stop signal and the like of the power device in the power module to the sub-module controller through the optical fiber; the sub-module control board uploads information such as the power module state, the battery state and the like to the middle-layer controller through optical fibers.
In a specific embodiment of the present invention, in a cascade H-bridge battery energy storage system of 6MW/10kV, each phase has 20 energy storage submodules, and 60 energy storage submodules are provided.
On the basis of meeting the basic application function requirements, the overall controller design selection also needs to consider a plurality of aspects such as cost, reliability, expandability, development work convenience, future maintainability, upgradability and the like.
In general, the converter control of the overall controller in this embodiment adopts an embedded controller CX2030 of Beckhoff, germany. The controller adopts an Intel i 72610 UE 1.5.5 GHz CPU as a processor, is essentially an embedded industrial personal computer and has strong processing capability. The control frequency of the whole converter is 10kHz, and the corresponding control period is 100 us. The CX2030 controller is mounted by a DIN guide rail, has a compact structure, can be integrated with various I/O modules to form a complete industrial control system and is mounted in a control cabinet, and the space occupancy rate is low.
This embodiment is equipped with 3 middle layer controllers, ABC three phases one per phase.
And the data interaction is carried out between the complete machine controller and the middle layer controller by adopting a 100Mbps fast Ethernet.
The intermediate layer controller adopts a fast Ethernet special ASIC (application specific integrated circuit) slave station decoding chip ET1100 of Beckhoff company to decode a fast Ethernet bus protocol, the processing delay of the special ASIC chip to the protocol is about 500ns, and the performance of a control system cannot be influenced. The core device of the middle layer controller adopts Xilinx company A7 series FPGA XC7A10T to realize the interface with ET1100 to complete the fast Ethernet communication with the whole controller, and realize the bidirectional communication extension of the star structure with optical fiber as the communication medium of 20 sub-module controllers. And a 20-path triangular wave PWM generator is designed in the FPGA, and the FPGA generates PWM signals according to the modulation value received from the main controller and the modulation method. And after the PWM signals are coded, the PWM signals are transmitted to a submodule controller through optical fibers to control a power module.
Meanwhile, the middle layer controller receives the state information of the sub-module controller about the power module and the battery module through optical fiber communication and transmits the state information to the whole machine controller through the fast Ethernet. In order to adapt to possible severe environment of an industrial field, the optical communication medium adopts 1mm diameter plastic optical fiber, and the optical communication medium has higher strength than glass optical fiber, good elasticity, corrosion resistance and strong environment adaptability. The fiber channel realizes high-speed signal transmission, high electrical strength isolation among controllers in a master-slave control system and avoids possible mutual interference.
The core of the sub-module controller adopts an FPGA chip PGL22G with low cost and high cost performance. Its main function has two parts: 1) decoding a switching signal instruction from the middle layer controller and outputting the switching signal instruction to a driving circuit; 2) and collecting and uploading information of the power module and the battery module.
The foregoing descriptions have been directed to embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (10)

1. A controller for a fast ethernet based modular battery energy storage system, comprising:
the whole machine controller is positioned on the upper layer;
the middle layer controller is positioned on the middle layer and is connected with the whole machine controller;
and the sub-module controller is positioned on the lower layer and is connected with the middle layer controller.
2. The fast ethernet-based controller for a modular battery energy storage system according to claim 1, wherein the overall controller is a universal controller.
3. The controller of a fast ethernet-based modular battery energy storage system according to claim 2, wherein the generic controller issues a control information stream to the middle layer controller; and the universal controller collects the management information flow summarized by the middle-layer controller.
4. The controller of a fast ethernet based modular battery energy storage system according to claim 1, wherein the number of said middle layer controllers is 3.
5. The controller of a fast ethernet based modular battery energy storage system according to claim 1, wherein each of said middle layer controllers comprises:
the number of the rapid Ethernet transformers is 1, and the whole machine controller is connected;
the fast Ethernet protocol chip is connected with the fast Ethernet transformer;
the FPGA is connected with the fast Ethernet protocol chip;
the optical fiber receiving interface is connected with the FPGA;
and the optical fiber transmitting interface is connected with the FPGA.
6. The controller of a fast ethernet based modular battery energy storage system according to claim 5, wherein said FPGA comprises:
one end of the sequential logic interface is connected with the fast Ethernet protocol chip, and the other end of the sequential logic interface is connected with the optical fiber receiving interface;
and one end of the PWM generator is connected with the sequential logic interface, and the other end of the PWM generator is connected with the optical fiber sending interface.
7. The controller of a fast ethernet-based modular battery energy storage system according to claim 1, further comprising energy storage sub-modules in optical fiber communication with one of said middle layer controllers, one of said sub-module controllers being configured for each of said energy storage sub-modules.
8. The controller of a fast ethernet based modular battery energy storage system of claim 7, wherein each sub-module controller comprises a sub-module control board,
each sub-module controller comprises an optical fiber sending interface and an optical fiber receiving interface which are correspondingly connected with the optical fiber receiving interface and the optical fiber sending interface in the middle layer controller respectively.
9. The controller of claim 1, wherein the overall controller and the middle-layer controller communicate with each other via a fast ethernet bus.
10. The controller of the fast ethernet-based modular battery energy storage system according to claim 8, wherein each middle layer controller is configured with N pairs of fiber receiving interfaces and fiber transmitting interfaces, and communicates with N sub-module controllers using a 1: N star communication structure.
CN202221301367.3U 2022-05-27 2022-05-27 Controller of modularized battery energy storage system based on fast Ethernet Active CN217279346U (en)

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Application Number Priority Date Filing Date Title
CN202221301367.3U CN217279346U (en) 2022-05-27 2022-05-27 Controller of modularized battery energy storage system based on fast Ethernet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221301367.3U CN217279346U (en) 2022-05-27 2022-05-27 Controller of modularized battery energy storage system based on fast Ethernet

Publications (1)

Publication Number Publication Date
CN217279346U true CN217279346U (en) 2022-08-23

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