CN113839463A - Wind-solar hydrogen production control system and communication method thereof - Google Patents
Wind-solar hydrogen production control system and communication method thereof Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
Abstract
The invention relates to a wind-solar hydrogen production control system and a communication control method, wherein the system comprises: the system comprises a data acquisition system, a micro-grid control system and a human-computer interaction system; the data acquisition system comprises a data acquisition layer controller, a direct current cabinet, fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment, which are connected with one another through EtherCAT to form an annular network; the acquisition layer controller of the data acquisition system performs data interaction with the direct current cabinet side equipment through the EtherCAT communication module, and the acquisition layer controller communicates with the local controller through the EtherCAT protocol. The micro-grid control system comprises a control layer controller and a time synchronization server; the man-machine interaction system is used for displaying the current state of the system. The invention adopts a three-level network architecture, is controlled in a layered manner, has a simple structure and is easy to maintain; the EtherCAT communication mode is adopted, so that the communication speed is high; the communication reliability is enhanced due to the ring network connection; the invention adds the timestamp mark to provide time reference for the control strategy, thereby avoiding the control error caused by data delay.
Description
Technical Field
The invention relates to the field of electric power, in particular to a wind-solar hydrogen production control system and a communication method thereof.
Background
With the rapid development of economy, the living standard of people is improved, and the dependence on electric power is higher and higher, and under the background, breaking through monopoly of the electric power industry is also a necessary trend. As a small-sized power system, the micro-grid has the advantages of low investment cost, small pollution to the environment, various power generation modes and the like. In various power generation modes, the influence of hydropower on the region is large, the power generation cost is high, and the power generation method is not suitable for vigorous development; the social influence of nuclear power is large, and potential safety hazards and a lot of uncertain factors exist; the ocean energy and the biological energy power generation such as tide are influenced by the aspects of technology, cost and the like, and the development speed is slow. In a comprehensive view, the wind power generation and the photovoltaic power generation have the advantages of low cost, rich resources and the like, and are the main sources of the current new energy power generation. However, wind power and photovoltaic power generation are intermittent and uncertain, grid-connected operation can have serious influence on operation of a power grid, and when an island operates, large wind-light power generation amount can cause resource waste such as wind abandoning and light abandoning, so that the addition of an energy storage device in a micro-grid system is very necessary. Due to the limitation of cost and technology, the problem of wind and light energy waste cannot be completely solved by a pure energy storage system, and hydrogen energy is used as a new clean energy, has the advantages of low density, high energy density, high capacity, easiness in compression, storage and transportation and the like, and can be comprehensively utilized with wind energy, photovoltaic energy and stored energy in a multi-energy complementary mode. And the hydrogen production electrolytic cell can directly work by using direct current output by the wind and light system, and has certain robustness to adapt to wind and light power generation, so that hydrogen production equipment is added in a micro-grid system to consume wind and light power generation under an island state, the wind and light abandoning amount is reduced, and the energy utilization rate is improved.
The physical architecture of a micro-grid system is shown in figure 1, a micro-grid bus is connected with a large power grid through a converter, and the system mainly comprises a fan power plant, a photovoltaic power plant, energy storage equipment, hydrogen production equipment and the like. In order to meet the requirements of a power grid, a control system of the microgrid needs to control each device in the system, and meanwhile, each device needs to send data such as current state, power generation amount and the like to the control system of the microgrid. Therefore, the communication between the control system of the microgrid and the devices has the requirements of safety, reliability, real-time performance and bidirectionality. At present, communication between a control system and equipment of a micro-grid is carried out by adopting communication protocols such as Modbus RTU, Modbus TCP and TCP/IP, the communication modes are influenced by transmission rate, so that the equipment has longer delay to the response of the control system, the response of the whole system is asynchronous, and the actual requirement is difficult to meet
Disclosure of Invention
In order to solve the technical problems, the invention provides a wind-solar hydrogen production control system and a communication control method thereof, wherein the wind-solar hydrogen production control system adopts a three-level network architecture, is controlled in a layered manner, has a simple structure and is easy to maintain; the EtherCAT communication mode is adopted, so that the communication speed is high; the communication reliability is enhanced due to the ring network connection; in addition, the invention also adds a timestamp mark in the communication data to provide a time reference for the control strategy.
The technical scheme of the invention is as follows: a wind-solar hydrogen production control system comprising: the system comprises a data acquisition system, a micro-grid control system and a human-computer interaction system, wherein the data acquisition system is respectively connected to the micro-grid control system and the human-computer interaction system;
the data acquisition system comprises a data acquisition layer controller, a direct current cabinet, fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment, which are connected with one another through EtherCAT to form an annular network; the controller of the data acquisition system performs data interaction with the direct current cabinet side equipment through the EtherCAT communication module, the acquisition layer controller is a master station, and other equipment of the direct current cabinet is slave stations; the acquisition layer controller is communicated with the local controller through an EtherCAT protocol, and the acquisition layer controller is communicated with fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment.
The micro-grid control system comprises a control layer controller and a time synchronization server, wherein the control layer controller is used as a master station of a control layer;
the man-machine interaction system comprises a database server and a display, and is used for displaying the current state of the system.
Furthermore, an acquisition layer controller of the data acquisition system is used as a master station, is provided with a network port and is used for carrying out EtherCAT communication with the master station of the control layer; and an EtherCAT interface is arranged between each slave station device of the data acquisition system, and can form a ring network to communicate with a master station of the data acquisition layer.
Furthermore, each slave station comprises a communication module, an analog-digital module (an analog quantity module and a digital quantity module) and an ultra-acquisition module, and is connected with the master station of the acquisition layer through EtherCAT; the communication module is provided with a Modbus-RTU interface, a Canopen interface, a Profibus interface, an EtherCAT interface and the like so as to meet the requirement that different slave station devices have different communication protocols; when the Ethernet card communicates with a main station of an acquisition layer, an EtherCAT interface is adopted, and communication is carried out through an EtherCAT protocol so as to meet the requirement of communication speed; the analog quantity module is used for acquiring data such as the environmental temperature and the environmental humidity in the power distribution cabinet. The digital quantity module is used for communicating with the circuit breakers between each device and the power grid and is used for monitoring and controlling the opening and closing states of the circuit breakers.
Further, the slave stations communicate with each other by EtherCAT to form a ring network, namely, the master station is connected with the slave station 1, the slave station 1 is connected with the slave station 2, two adjacent slave stations are connected, and the slave station 5 returns to the master station. The ring network has better reliability, and when a certain branch fails, the whole system is not influenced. And the EtherCAT communication speed is fast, and the response requirement of a control system to equipment can be met.
Further, EtherCAT communication between local controllers adopts optical fibers for communication, so that rapidity and stability of long-distance communication are met. And a photoelectric conversion module is added behind each local controller, is remotely transmitted through optical fibers, and is converted into a network cable through a conversion module before entering the control layer controller, and the network cable is connected with the control layer controller through a router.
Furthermore, the control layer controller is provided with a USB interface, a DVI interface, a VGA interface, an RJ-45 interface and the like for communication connection with external equipment of the control layer.
Furthermore, the time synchronization server is used for generating current accurate time, and unifying the time of each device when performing correction time synchronization with other controllers in the system; when data communication is performed, the current time is added as a time stamp to the communication data. (ii) a
According to another aspect of the invention, the communication control method of the wind-solar hydrogen production system based on the EtherCAT is further provided, and comprises the following steps:
step 1, a control layer controller sends control commands to a local controller through an EtherCAT protocol, wherein the control commands comprise start-stop commands, working modes and power set value commands;
step 2, the local controller sends the received control command to the wind-light hydrogen storage equipment so as to control the equipment; the local controller sends the acquired data to the control layer controller through an EtherCAT protocol;
step 3, the control layer controller sends a control command to the acquisition layer controller through an EtherCAT protocol, wherein the control command comprises a control command of the circuit breaker;
step 4, correcting and timing time by all controllers in the wind-solar hydrogen production system and a time server of the control layer;
step 5, the acquisition layer controller sends a control command to the slave station of the direct current cabinet, and the command control is realized through the digital quantity module; the temperature and humidity of the direct current cabinet acquired by the analog quantity module, the direct current voltage and the direct current data of the direct current cabinet side acquired by the ultra-acquisition module are sent to the acquisition layer controller through an EtherCAT protocol and then are transmitted to the control layer controller, wherein when the acquisition of the data is finished, an acquisition timestamp mark is added behind the acquired data.
Furthermore, all controllers in the system can automatically synchronize with a time server of the control layer, so that the time consistency of the whole wind-solar hydrogen production system is ensured; the method specifically comprises the following steps:
step 4.1, the controller automatically starts time setting;
step 4.2, when the controller is communicated with the wind-solar hydrogen production equipment, checking whether the flag bit bBusy of the controller is 1, and if so, performing step 4.3; otherwise, returning to the step 4.2 to continuously judge whether the flag bit is 1;
step 4.3, setting a time acquisition starting mark as 1;
step 4.4, acquiring the current controller time;
step 4.5, adding time into the array of the acquired data, and placing the time as a timestamp at the end of the data, wherein the timestamp mark is successfully added;
step 4.6, setting a time acquisition starting mark to be 0;
furthermore, the wind and light hydrogen production equipment comprises fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment.
Has the advantages that:
compared with the existing microgrid control system, the wind-solar hydrogen production control system and the communication control method thereof improve the communication rate by adopting an EtherCAT communication mode; the robustness and the reliability of the system are improved by adopting the annular communication network; meanwhile, a timestamp mark is added after data is collected, so that the control strategy can be referred to, and the control instruction is issued more quickly, accurately and effectively.
Drawings
FIG. 1 is a prior art physical architecture of a microgrid system;
FIG. 2 is a block diagram of a control system for producing hydrogen from wind and light according to the present invention;
FIG. 3 is a detailed block diagram of the structure of a wind-solar hydrogen production control system of the invention;
fig. 4 is a flow chart of the controller for automatic time synchronization according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention without creative efforts.
According to one embodiment of the invention, the structure of the wind-solar hydrogen production control system is shown in FIG. 2 and comprises a data acquisition layer, a control layer and a display layer.
The data acquisition layer is provided with a data acquisition system, a controller of the data acquisition system performs data interaction with direct current cabinet side equipment through an EtherCAT communication module, the controller is a master station, and other equipment is slave stations; the system is communicated with a local controller through an EtherCAT protocol and is communicated with fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment.
The control layer is provided with a micro-grid control system; the micro-grid control system comprises a control layer controller and a time synchronization server, wherein the control layer controller is used as a master station of a control layer;
the display layer is provided with a human-computer interaction system, and the human-computer interaction system comprises a database server and a display and is used for displaying the current state of the system.
The main station of the data acquisition layer is provided with a network port and is used for carrying out EtherCAT communication with the main station of the control layer. And the slave station devices are provided with EtherCAT interfaces and can form a ring network to communicate with the master station of the data acquisition layer.
As shown in fig. 3, each slave station includes a communication module, an analog-to-digital module (analog module, digital module), and an ultra-acquisition module, and is connected to the master station of the acquisition layer through EtherCAT. The communication module is provided with a Modbus-RTU interface, a Canopen interface, a Profibus interface, an EtherCAT interface and the like so as to meet the requirement that different slave station devices have different communication protocols; when the Ethernet card communicates with the main station of the acquisition layer, the Ethernet card interface is adopted, and the Ethernet card interface communicates through an Ethernet card protocol to meet the requirement of communication speed. The analog quantity module is used for acquiring data such as the environmental temperature and the environmental humidity in the power distribution cabinet. The digital quantity module is used for communicating with the circuit breakers between each device and the power grid and is used for monitoring and controlling the opening and closing states of the circuit breakers.
In the invention, the slave stations communicate with each other by EtherCAT to form a ring network, namely, the master station is connected with the slave station 1, the slave station 1 is connected with the slave station 2, two adjacent slave stations are connected, and the slave station 5 returns to the master station. The ring network has better reliability, and when a certain branch fails, the whole system is not influenced. And the EtherCAT communication speed is fast, and the response requirement of a control system to equipment can be met. EtherCAT communication is carried out by adopting optical fibers among local controllers so as to meet the rapidity and stability of long-distance communication. And a photoelectric conversion module is added behind each local controller, is remotely transmitted through optical fibers, and is converted into a network cable through a conversion module before entering the control layer controller, and the network cable is connected with the control layer controller through a router.
Furthermore, the control layer controller is provided with a USB interface, a DVI interface, a VGA interface, an RJ-45 interface and the like for communication connection with external equipment of the control layer.
The time synchronization server is used for generating current accurate time, synchronizing time with the slave station equipment of the acquisition layer and unifying the time of each equipment; when data communication is carried out, the current time is used as a time stamp to be added behind communication data;
according to another embodiment of the invention, the communication control method of the wind-solar hydrogen production system based on the EtherCAT is further provided, and comprises the following steps:
step 1, a control layer controller sends control commands to a local controller through an EtherCAT protocol, wherein the control commands comprise start-stop commands, working modes and power set value commands;
step 2, the local controller sends the received control command to the wind-light hydrogen storage equipment so as to control the equipment; the local controller sends the acquired data to the control layer controller through an EtherCAT protocol;
step 3, the control layer controller sends a control command to the acquisition layer controller through an EtherCAT protocol, wherein the control command comprises a control command of the circuit breaker;
step 4, correcting and timing time by all controllers in the wind-solar hydrogen production system and a time server of the control layer;
step 5, the acquisition layer controller sends a control command to the slave station of the direct current cabinet, and the command control is realized through the digital quantity module; the temperature and humidity of the direct current cabinet acquired by the analog quantity module, the direct current voltage and the direct current data of the direct current cabinet side acquired by the ultra-acquisition module are sent to the acquisition layer controller through an EtherCAT protocol and then are transmitted to the control layer controller, wherein when the acquisition of the data is finished, an acquisition timestamp mark is added behind the acquired data.
The invention adds the timestamp mark and provides a basis for the accuracy of the control instruction. All controllers in the wind-solar hydrogen production system and a time server of a control layer are used for correcting and timing time, but network delay exists when data acquisition is completed and data is transmitted to the control layer, so that an acquisition timestamp mark needs to be added behind the acquired data.
As shown in fig. 4, the controller automatically synchronizes time with the time server of the control layer, so that the time consistency of the whole wind-solar hydrogen production system is ensured; then when the controller is communicated with the wind-solar hydrogen production equipment, the flag bit bBusy of the controller is set to be 1, and the flag bit bBusy is automatically cleared when the communication is completed; and when the bBusy is 1, acquiring the time of the current controller, placing the time at the tail of the current acquisition data, and successfully adding the timestamp mark. The specific time setting process is as follows:
step 4.1, the controller automatically starts time setting;
step 4.2, when the controller is communicated with the wind-solar hydrogen production equipment, checking whether the flag bit bBusy of the controller is 1, and if so, performing step 4.3; otherwise, returning to the step 4.2 to continuously judge whether the flag bit is 1;
step 4.3, setting a time acquisition starting mark as 1;
step 4.4, acquiring the current controller time;
step 4.5, adding time into the array of the acquired data, and placing the time as a timestamp at the end of the data, wherein the timestamp mark is successfully added;
and 4.6, setting the time acquisition starting mark to be 0.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but various changes may be apparent to those skilled in the art, and it is intended that all inventive concepts utilizing the inventive concepts set forth herein be protected without departing from the spirit and scope of the present invention as defined and limited by the appended claims.
Claims (9)
1. A wind-solar hydrogen production control system is characterized by comprising: the system comprises a data acquisition system, a micro-grid control system and a human-computer interaction system, wherein the data acquisition system is respectively connected to the micro-grid control system and the human-computer interaction system;
the data acquisition system comprises a data acquisition layer controller, a direct current cabinet, fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment, which are connected with one another through EtherCAT to form an annular network; the acquisition layer controller of the data acquisition system performs data interaction with direct-current cabinet side equipment through an EtherCAT communication module, the acquisition layer controller is a master station, and other equipment of the direct-current cabinet is slave stations; the acquisition layer controller is communicated with the local controller through an EtherCAT protocol to realize communication with fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment;
the micro-grid control system comprises a control layer controller and a time synchronization server, wherein the control layer controller is used as a master station of a control layer; the time synchronization server is used for correcting and synchronizing time of all controllers in the system;
the man-machine interaction system comprises a database server and a display, and is used for displaying the current state of the system.
2. The wind-solar hydrogen production control system according to claim 1, wherein the acquisition layer controller of the data acquisition system is used as a master station, has a network port, and is used for performing EtherCAT communication with the master station of the control layer; and an EtherCAT interface is arranged between each slave station device of the data acquisition system, and the slave station devices form a ring network to communicate with a master station of the data acquisition layer.
3. The wind-solar hydrogen production control system according to claim 1, wherein each slave station comprises a communication module, an analog quantity module, a digital quantity module and a super-acquisition module, and is connected with the master station of the acquisition layer through EtherCAT; when the Ethernet card communicates with a main station of an acquisition layer, an EtherCAT interface is adopted, and communication is carried out through an EtherCAT protocol so as to meet the requirement of communication speed; the analog quantity module is used for acquiring data of the environmental temperature and the environmental humidity in the power distribution cabinet; the digital quantity module is used for communicating with the circuit breakers between each device and the power grid and is used for monitoring and controlling the opening and closing states of the circuit breakers.
4. The wind-solar hydrogen production control system according to claim 1, wherein EtherCAT communication between the local controllers of the wind-solar hydrogen production equipment is carried out by adopting optical fibers; and a photoelectric conversion module is added behind each local controller, is remotely transmitted through optical fibers, and is converted into a network cable through the photoelectric conversion module before entering the control layer controller, and the network cable is connected with the control layer controller through the router.
5. The wind-solar hydrogen production control system according to claim 1, wherein the control layer controller is provided with a USB interface, a DVI interface, a VGA interface and an RJ-45 interface for communication connection with external equipment of the control layer.
6. The wind-solar hydrogen production control system according to claim 1, wherein the time synchronization server is used for generating current accurate time and unifying the time of each device when performing calibration time synchronization with other controllers in the system; when data communication is performed, the current time is added as a time stamp to the communication data.
7. A communication control method of a wind-solar hydrogen production system based on EtherCAT is characterized by comprising the following steps:
step 1, a control layer controller sends control commands to a local controller through an EtherCAT protocol, wherein the control commands comprise start-stop commands, working modes and power set value commands;
step 2, the local controller sends the received control command to the wind-light hydrogen storage equipment so as to control the equipment; the local controller sends the acquired data to the control layer controller through an EtherCAT protocol;
step 3, the control layer controller sends a control command to the acquisition layer controller through an EtherCAT protocol, wherein the control command comprises a control command of the circuit breaker;
step 4, correcting time synchronization of time is carried out by all controllers in the wind-solar hydrogen production system and a time server of the control layer;
step 5, the acquisition layer controller sends a control command to the slave station of the direct current cabinet, and the command control is realized through the digital quantity module; the temperature and humidity of the direct current cabinet acquired by the analog quantity module, the direct current voltage and the direct current data of the direct current cabinet side acquired by the ultra-acquisition module are sent to the acquisition layer controller through an EtherCAT protocol and then are transmitted to the control layer controller, wherein an acquisition timestamp mark is added at the tail of the acquired data when the data acquisition is completed.
8. The communication control method of the wind-solar hydrogen production system based on the EtherCAT as claimed in claim 7, wherein all controllers in the system automatically correct the time synchronization with the time server of the control layer to ensure the time consistency of the whole wind-solar hydrogen production system, and the correction time synchronization specifically comprises the following steps:
step 4.1, the controller automatically starts time setting;
step 4.2, when the controller is communicated with the wind-solar hydrogen production equipment, checking whether the flag bit bBusy of the controller is 1, and if so, performing step 4.3; otherwise, returning to the step 4.2 to continuously judge whether the flag bit is 1;
step 4.3, setting a time acquisition starting mark as 1;
step 4.4, acquiring the current controller time;
step 4.5, adding time into the array of the acquired data, and placing the time as a timestamp at the end of the data, wherein the timestamp mark is successfully added;
and 4.6, setting the time acquisition starting mark to be 0.
9. The communication control method of the EtherCAT-based wind-solar hydrogen production system according to claim 7, wherein the wind-solar hydrogen production equipment comprises fan equipment, photovoltaic equipment, hydrogen production equipment and energy storage equipment.
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