CN217546078U - Networking structure for hierarchical grouping coordination power control of large energy storage power station - Google Patents
Networking structure for hierarchical grouping coordination power control of large energy storage power station Download PDFInfo
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- CN217546078U CN217546078U CN202221363803.XU CN202221363803U CN217546078U CN 217546078 U CN217546078 U CN 217546078U CN 202221363803 U CN202221363803 U CN 202221363803U CN 217546078 U CN217546078 U CN 217546078U
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Abstract
The utility model provides a network deployment structure that is used for large-scale energy storage power station layering to divide into groups coordinated power control: the coordination control assembly PMS is connected between an energy management system EMS of the energy storage power station and a plurality of groups of energy storage converters PCS; the coordination control assembly PMS comprises an energy storage power station coordination controller and a plurality of subsystem coordination controllers which are connected with each other; each subsystem coordination controller is connected with a plurality of energy storage converters (PCS); each energy storage converter PCS is connected with a group of battery management systems BMS; and the subsystem coordination controller is connected with the energy storage converter PCS through an EtherCAT communication board card. A new energy storage power station hierarchical grouping networking structure and a topological form of connection thereof are formed on the basis of a coordination control component PMS, and a network topology and hardware composition basis is provided for realizing better large-scale energy storage power station hierarchical grouping coordination power control.
Description
Technical Field
The utility model relates to an energy storage power station and communication and control network technical field especially relate to a network deployment structure that is used for large-scale energy storage power station layering to divide into groups to coordinate power control.
Background
With the gradual and wide application of new energy storage in power systems, the capacity of a single energy storage power station is developing towards the hundreds megawatt level and even more. The large-scale energy storage power station comprises a larger number of energy storage battery packs, and has higher requirements on accurate coordination control among different energy storage battery packs. As shown in fig. 3 in the specification, the conventional energy storage power station adopts a GOOSE protocol based on IEC61850 for centralized control, lacks packet hierarchical coordination control, cannot meet the requirements of fast synchronous power control of a large number of energy storage battery packs and PCS, and has poor system configuration flexibility and inconvenient system debugging and maintenance.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that exists in the middle of the prior art and not enough, the utility model provides a network deployment structure for large-scale energy storage power station layering is divided into groups and is coordinated power control, based on coordinated control subassembly PMS, forms the topological form that new energy storage power station layering is divided into groups network deployment structure and is connected, for realizing the basis that more excellent large-scale energy storage power station layering is divided into groups and is coordinated power control and provide network topology and hardware constitution.
The technical scheme is as follows:
a networking structure for hierarchical grouping coordination power control of a large energy storage power station is characterized in that: the coordination control assembly PMS is connected between an energy management system EMS of the energy storage power station and a plurality of groups of energy storage converters PCS; the coordination control assembly PMS comprises an energy storage power station coordination controller and a plurality of subsystem coordination controllers which are connected with each other; each subsystem coordination controller is connected with a plurality of energy storage converters (PCS); each energy storage converter PCS is connected with a group of battery management systems BMS.
The subsystem coordination controller is connected with the energy storage converter PCS through an EtherCAT communication board card and a communication medium. The communication medium may specifically adopt a network cable or an optical fiber.
Furthermore, the energy storage power station coordination controller, the subsystem coordination controller and the energy storage converter PCS are provided with EtherCAT communication board cards and peripheral equipment.
Furthermore, the energy management system EMS of the energy storage power station is connected with the energy storage power station coordination controller, and the energy storage power station coordination controller is connected with each subsystem coordination controller through a star topology by adopting an IEC61850 communication protocol; and an EtherCAT communication protocol is adopted between the subsystem coordination controller and the multiple groups of energy storage converters PCS, and networking is performed in a star topology through an EtherCAT switch.
Further, networking by adopting the double-layer EtherCAT protocol: the first layer of EtherCAT network takes the energy storage power station coordination controller as a master station, and all the subsystem coordination controllers as slave stations are connected in a ring network topology; the second-layer EtherCAT network takes the subsystem coordination controller as a master station, and the energy storage converter PCS as a slave station is connected in a ring network topology; and the IEC61850 communication network is connected with the energy storage power station energy management system EMS, the energy storage power station coordination controller, the subsystem coordination controller and the energy storage converter PCS.
The utility model discloses and preferred scheme provides a new network deployment structure to energy storage power station control to form the network deployment form that the layering is divided into groups, can merge into the EtherCAT agreement in the network deployment on this basis, with the quick synchronous communication ability who utilizes the EtherCAT agreement, can effectively promote the large-scale energy storage power station power control response rate and the synchronous rate that contain a large amount of energy storage battery groups, promote the communication reliability.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description:
fig. 1 is a schematic diagram of the networking based on IEC61850 and EtherCAT protocols according to an embodiment of the present invention;
fig. 2 is a schematic diagram of networking based on a double-layer EtherCAT protocol according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a conventional energy storage power station control system architecture.
Detailed Description
In order to make the features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail as follows:
the energy storage power station of the prior art as shown in fig. 3 adopts the GOOSE protocol centralized control structure based on IEC61850 for improvement and adjustment.
The utility model discloses an among the structural design, the core part includes following two main points:
one of them is that: a coordination control assembly PMS is connected between an energy management system EMS of the energy storage power station and a plurality of groups of energy storage converters PCS, and is a hardware device basis for forming grouping and layering control.
The coordination control assembly PMS comprises an energy storage power station coordination controller and a plurality of subsystem coordination controllers which are connected with each other; each subsystem coordination controller is connected with a plurality of energy storage converters PCS; each energy storage converter PCS is connected with a battery management system BMS.
The second is that: the subsystem coordination controller and the energy storage converter PCS are connected through an EtherCAT communication board card, and a communication medium can generally adopt a network cable or an optical fiber. The method aims to integrate an EtherCAT protocol in the networking so as to improve the communication capability of the networking.
Above equipment components such as PMS, EMS and PCS all belong to prior art, the utility model provides a new scheme of structure of its network deployment.
On the basis, the energy storage power station coordination controller, the subsystem coordination controller and the energy storage converter PCS can be provided with an EtherCAT communication board card and peripheral equipment. The fusion degree of the EtherCAT protocol in networking is further improved.
On the basis of basic design, the present embodiment provides the following two specific implementations for a networking topology:
as shown in fig. 1, the networking scheme is implemented by using IEC61850 and EtherCAT protocols: the energy management system EMS of the energy storage power station is connected with the energy storage power station coordination controller, and the energy storage power station coordination controller is connected with each subsystem coordination controller through a star topology by adopting an IEC61850 communication protocol; and an EtherCAT communication protocol is adopted between the subsystem coordination controller and the multiple groups of energy storage converters PCS, and networking is carried out in a star topology through an Ethercat switch.
As shown in fig. 2, for the networking scheme of the dual-layer EtherCAT protocol: the first layer of EtherCAT network takes an energy storage power station coordination controller as a master station, and each subsystem coordination controller as a slave station is connected in a ring network topology; the second-layer EtherCAT network takes the subsystem coordination controller as a master station, and the energy storage converter PCS as a slave station is connected in a ring network topology; and an energy storage power station energy management system EMS, an energy storage power station coordination controller, a subsystem coordination controller and an energy storage converter PCS are connected with the IEC61850 communication network.
The above is that the utility model provides an use networking structure as the device scheme of core.
In order to make the skilled person better understand the meaning of the present design, the following combined with the prior art and common general knowledge in communication and control of energy storage power stations makes further application prospects for the present design, but should not be considered as limiting the structure of the device of the present invention:
firstly, the design can add a coordination control layer on the traditional energy storage power station control scheme shown in fig. 3, so that the hierarchical instruction of the main coordination controller and the subsystem coordination controller is used for issuing, and the grouping hierarchical control of the high-capacity energy storage power station is realized.
Under this structure, the total station control structure comprises three layers: 1. the EMS energy management layer, namely an energy storage power station energy management system EMS, has the functions of docking power grid dispatching instructions, carrying out power station level system management and battery system monitoring. 2. The PMS coordination control layer comprises an energy storage power station coordination controller and a subsystem coordination controller, and has the function of carrying out coordination control on multiple groups of PCS and energy storage battery packs so as to realize the cooperative quick response of the large-scale energy storage power station. 3. And the PCS energy storage converter has the function of receiving the command of the subsystem coordination controller and directly carrying out active power control and reactive power control on the battery pack.
The energy storage power station coordination controller has the following functions: receiving current and voltage sampling data from a grid-connected point current transformer and a voltage transformer, and calculating a power control target value; acquiring active and reactive control instructions of a power grid to an energy storage power station from an EMS energy management layer; and issuing a power control instruction to each group of energy storage subsystem coordination controllers.
The energy storage power station subsystem coordination controller has the following functions: and each subsystem coordination controller is responsible for power control of one energy storage battery pack (comprising a plurality of PCS), and rapid coordinated control of the PCS is realized through an EtherCAT protocol.
Under the framework of an EtherCAT protocol, the energy storage power station coordination controller and the energy storage subsystem coordination controller have an EtherCAT master station control function, and the energy storage subsystem coordination controller and the energy storage bidirectional converter have an EtherCAT slave station function.
In the two provided network topology structures, the energy storage power station coordination controller and the subordinate energy storage subsystem coordination controller adopt IEC61850 protocol and/or EtherCAT protocol for communication. The IEC61850 network is mainly used for transmitting conventional control instructions, monitoring data and the like, and the EtherCAT network is mainly used for transmitting rapid coordination control instructions.
After receiving a power control instruction of a power grid, an Energy Management System (EMS) of the energy storage power station transmits the power control instruction to an energy storage power station coordination controller through an IEC61850 network; the energy storage power station coordination controller combines electrical data acquired by an energy storage grid-connected bus and issues real-time control signals to the energy storage subsystem coordination controller and each subordinate energy storage converter group through an EtherCAT network. Through grouping control, the communication efficiency of controlling a large number of energy storage battery packs is improved, and the failure rate is reduced. And monitoring and recording data of each device are transmitted to the energy management system through IEC61850 networking and are used for recording, checking and alarming abnormal states.
The present invention is not limited to the above-mentioned preferred embodiments, and any person can derive other various networking structures for hierarchical grouping coordination power control of large-scale energy storage power stations according to the teaching of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (4)
1. The utility model provides a network deployment structure that is used for large-scale energy storage power station layering to divide into groups coordinated power control which characterized in that: the coordination control assembly PMS is connected between an energy management system EMS of the energy storage power station and a plurality of groups of energy storage converters PCS; the coordination control assembly PMS comprises an energy storage power station coordination controller and a plurality of subsystem coordination controllers which are connected with each other; each subsystem coordination controller is connected with a plurality of energy storage converters (PCS); each energy storage converter PCS is connected with a group of battery management systems BMS; and the subsystem coordination controller is connected with the energy storage converter PCS through an EtherCAT communication board card and a communication medium.
2. The networking architecture for hierarchical packet coordinated power control of large energy storage power stations of claim 1, wherein: the energy storage power station coordination controller, the subsystem coordination controller and the energy storage converter PCS are provided with EtherCAT communication board cards and peripheral equipment.
3. The networking architecture for hierarchical packet coordinated power control of large energy storage power stations of claim 1, wherein: the energy management system EMS of the energy storage power station is connected with the energy storage power station coordination controller, and the energy storage power station coordination controller is connected with each subsystem coordination controller through a star topology by adopting an IEC61850 communication protocol; and an EtherCAT communication protocol is adopted between the subsystem coordination controller and the multiple groups of energy storage converters PCS, and networking is carried out in a star topology through an Ethercat switch.
4. The networking architecture for hierarchical packet coordinated power control of large energy storage power stations of claim 2, wherein: networking by adopting the EtherCAT protocol with double layers: the first layer of EtherCAT network takes the energy storage power station coordination controller as a master station, and all the subsystem coordination controllers as slave stations are connected in a ring network topology; the second-layer EtherCAT network takes the subsystem coordination controller as a master station, and the energy storage converter PCS as a slave station is connected in a ring network topology; and the IEC61850 communication network is connected with the energy storage power station energy management system EMS, the energy storage power station coordination controller, the subsystem coordination controller and the energy storage converter PCS.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116192564A (en) * | 2023-05-04 | 2023-05-30 | 安徽中科智充新能源科技有限公司 | Quick control system of energy storage power station based on EtherCAT looped netowrk framework |
| CN116706954A (en) * | 2023-06-19 | 2023-09-05 | 广东新型储能国家研究院有限公司 | IEC 61850-based energy storage hierarchical control system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116192564A (en) * | 2023-05-04 | 2023-05-30 | 安徽中科智充新能源科技有限公司 | Quick control system of energy storage power station based on EtherCAT looped netowrk framework |
| CN116706954A (en) * | 2023-06-19 | 2023-09-05 | 广东新型储能国家研究院有限公司 | IEC 61850-based energy storage hierarchical control system and control method |
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