CN103078407B - Intelligent control system for microgrid - Google Patents
Intelligent control system for microgrid Download PDFInfo
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Abstract
The invention discloses an intelligent control system for a microgrid. The intelligent control system for the microgrid comprises a microgrid energy management unit, a central control unit and a distribution type control unit, wherein the central control unit is respectively connected with the microgrid energy management unit and the distribution type control unit; the microgrid energy management unit is used for realizing the optimal energy matching of the mcrogid; the central control unit issues a command to the distribution type control unit according to the comprehensive operation control command of the microgrid energy management unit; and the distribution type control unit controls a power generation unit or an energy storage device. According to the intelligent control system for the microgrid, which is disclosed by the invention, the whole system is divided into different logic blocks, a system function is refined, and the system development and maintenance cost is greatly lowered.
Description
Technical field
The present invention relates to micro grid control system technical field, be specifically related to a kind of intelligent control system for microgrid.
Background technology
Since entering 21 century, along with the continuous decline of the resource reserve such as oil, coal, worldwide energy supply constant tension, the regenerative resource developing clean and effective becomes the main outlet solving future source of energy problem.Current widely used several new forms of energy comprise solar energy, wind energy, fuel cell etc., be distributed power source (Distributed Energy Resources, DER), some generation technologies are called distributed generation technology (Distributed Generation, DG) accordingly.Distributed generation technology is combined with bulk power grid, the major way thought to reduce energy consumption by domestic and international many experts and scholars, improving power system security and flexibility, but the impact of distributed generation technology on bulk power grid be one must not irrespective major issue.In order to make full use of the economic benefit that distributed power generation brings, improve reliability simultaneously, and reduce its impact to major network as far as possible, the concept of micro-capacitance sensor (microgrid) is carried out.
Micro-capacitance sensor is the independent dispersion system that scale is less, and adopt a large amount of modern electric technology, by gas turbine, wind-powered electricity generation, photovoltaic generation, fuel cell and energy storage device etc. combine, and are directly connected on user side.For bulk power grid, micro-capacitance sensor can be regarded as a controllable in electrical network, it can within the several seconds action with the demand of satisfied outside transmission and distribution networks; On the other hand, micro-capacitance sensor also can meet the particular demands of user, as improved local reliability, keeping local voltage stabilization, by utilizing waste heat improve energy utilization efficiency and provide uninterrupted power supply etc.Micro-capacitance sensor and bulk power grid are by energy exchange, and the two is for subsequent use each other, thus greatly improves power supply reliability.
Micro-capacitance sensor possesses the advantage such as diversification of intelligent, flexibility, environmental protection and Energy harvesting, certainly will become the important development direction of following electrical network.In China, about the integrated of distributed energy resource system and control research also have very large gap compared with developed countries, the research work of some colleges and universities and research institution focuses mostly in the development of the hardware such as single Distributed-generation equipment and electric power station system, or small-sized independent wind power generation/solar power generation/diesel engine system is integrated.But from micro-capacitance sensor angle, to the micro-grid system stable operation formed based on wind energy, solar energy, fuel cell distributed generator unit and load, energy storage link and control theory, optimum Match control strategy, and under considering the condition of renewable energy power generation power supply and load randomness, the research of micro-grid system on-line intelligence control system also sets foot in seldom, and this seriously hinders applying of China's distributed energy resource system and running business big and strong of related industries.Therefore research and develop networking more and intelligentized micro-capacitance sensor real-time online intelligent control system, EMS system and WEB phase are merged, improve autgmentability and the compatibility of system, there is higher realistic meaning and using value.
Summary of the invention
The present invention proposes a kind of intelligent control system for microgrid, monitoring and controlling function can be provided for comprising photovoltaic generation, wind power generation, fuel cell power generation distributed power supply and batteries to store energy unit.Intelligent control system for microgrid of the present invention comprises microgrid energy administrative unit, central control unit and distributed control unit, this intelligent control system for microgrid can monitor whole micro-capacitance sensor equipment running status, and according to current micro-capacitance sensor running status, adopt micro-capacitance sensor stable operation and control theory, select optimum Match control strategy, for the feature that distributed power source is different, Based Intelligent Control is carried out to microgrid energy supply, give full play to micro-capacitance sensor low-carbon (LC), economic advantage.The present invention adopts the mode of layering to carry out architecture system, and by whole system is divided into different logical blocks, refinement systemic-function, greatly reduces the cost of system development and maintenance.
The present invention is achieved by following proposal:
A kind of intelligent control system for microgrid, comprises microgrid energy administrative unit, central control unit and distributed control unit; Described central control unit is connected with microgrid energy administrative unit and distributed control unit respectively; Described microgrid energy administrative unit is for realizing the energy match of micro-capacitance sensor optimum; Described central control unit assigns instruction to distributed control unit according to the integrated operation control command of microgrid energy administrative unit; Described distributed control unit controls the work of generator unit or energy storage device.
Described microgrid energy administrative unit accepts dispatching of power netwoks/control command, and according to the feature of current micro-capacitance sensor running status and each distributed generation unit, by optimizing the integrated operation control command calculating and form central control unit, collect each subsystem operation information that each distributed control unit of process is uploaded simultaneously, assess current micro-capacitance sensor running status.
Described microgrid energy administrative unit provides data management, supervision, control and optimization for micro-capacitance sensor dispatching control center, ensures the stable and high effective operation of micro-capacitance sensor;
Described central control unit completes micro-capacitance sensor and runs control and pattern switching; By receiving the integrated operation control command of microgrid energy administrative unit, converting each subsystem instruction to, being handed down to distributed control unit and performing, realizing also/off-grid stable operation; Gather the real-time running data of each distributed control unit simultaneously, and be uploaded to microgrid energy administrative unit;
Described distributed control unit accepts and performs the instruction that central control unit assigns, and controls generator unit or energy storage device and to drop into or out of service, drop into or excision load; And each subsystem operation information is uploaded to central control unit in real time.
Compared with prior art, advantage of the present invention and beneficial effect are: the present invention is by being divided into different unit by whole system, and refinement systemic-function, greatly reduces the cost of system development and maintenance; Can according to current micro-capacitance sensor running status, adopt micro-capacitance sensor stable operation and control theory, select optimum Match control strategy, for the feature that distributed power source is different, Based Intelligent Control is carried out to microgrid energy supply, gives full play to micro-capacitance sensor low-carbon (LC), economic advantage.
Accompanying drawing explanation
Fig. 1 is intelligent control system for microgrid structure chart of the present invention.
Fig. 2 is the energy management unit schematic diagram of this novel practical.
Fig. 3 is the energy management unit functional structure chart of this novel practical.
Embodiment
Below in conjunction with accompanying drawing, intelligent control system provided by the invention is further described.
As shown in Figure 1, a kind of intelligent control system for microgrid comprises microgrid energy administrative unit, central control unit and distributed control unit; Described central control unit is connected with microgrid energy administrative unit and distributed control unit respectively; Described distributed control unit is made up of load governor, distributed generation unit controller, energy storage controller; Described microgrid energy administrative unit is for realizing the energy match of micro-capacitance sensor optimum; Described central control unit assigns instruction to distributed control unit according to the integrated operation control command of microgrid energy administrative unit; Described distributed control unit controls generator unit or energy storage device.
Described microgrid energy administrative unit accepts dispatching of power netwoks/control command, and according to the feature of current micro-capacitance sensor running status and each distributed generation unit, by optimizing the integrated operation control command calculating and form central control unit, collect each subsystem operation information that each distributed control unit of process is uploaded simultaneously, assess current micro-capacitance sensor running status.
Described microgrid energy administrative unit provides data management, supervision, control and optimization for micro-capacitance sensor dispatching control center, ensures the stable and high effective operation of micro-capacitance sensor;
Described central control unit completes micro-capacitance sensor and runs control and pattern switching; By receiving the integrated operation control command of microgrid energy administrative unit, converting each subsystem instruction to, being handed down to distributed control unit and performing, realizing also/off-grid stable operation; Gather the real-time running data of each distributed control unit simultaneously, and be uploaded to microgrid energy administrative unit;
Described distributed control unit accepts and performs the instruction that central control unit assigns, and controls generator unit or energy storage device and to drop into or out of service, drop into or excision load; And each subsystem operation information is uploaded to central control unit in real time.
Adopt Ethernet interface between described microgrid energy management system and central control unit, follow IEC61850, IEC61499 agreement, realize micro-capacitance sensor equipment monitor and control, ensure the stable and high effective operation of micro-capacitance sensor.According to the actual conditions of equipment each in micro-capacitance sensor, the communication mode between micro-capacitance sensor central control unit and distributed control unit comprises RS485, CAN, Ethernet etc.
Described microgrid energy administrative unit comprises presentation layer, functional layer, data Layer and key-course, for micro-capacitance sensor dispatching control center provides data management, supervision, control and optimization, this unit adopts J2EE framework technology SSI(Struts+Spring+Ibatis) design, wherein Struts is used for Systematical control, Spring serves as system container and realizes decoupling zero, and Ibatis then develops for persistent layer.Whole system achieves the seamless integration of SSI by XML configuration file, improves the maintainability of system.
Described central control unit completes micro-capacitance sensor and runs control and pattern switching, by receiving the integrated operation control command of microgrid energy administrative unit, converts each subsystem instruction to, is handed down to distributed control unit and performs, realize also/off-grid stable operation; Gather the real-time running data of each distributed control unit simultaneously, and be uploaded to microgrid energy administrative unit; Described central control unit adopts the dual processors Design of Hardware Architecture of ARM+DSP, follows IEC61850 international standard, integrates measurement, protection, controls and signal.
Described distributed control unit is made up of load governor, distributed generation unit controller, energy storage controller.Described distributed control unit accepts and performs the instruction that central control unit assigns, and controls generator unit or energy storage device and to drop into or out of service, drop into or excision load; And each subsystem operation information is uploaded to central control unit in real time.Distributed control unit adopts DSP as control system core, according to different generator units, designs the SPWM modulator approach of Quito ring feedback controller, controller and inverter respectively, realizes the integrated control strategy that equity controls and master & slave control combines.
Shown in Fig. 2, microgrid energy administrative unit comprises presentation layer, functional layer, data Layer and key-course, and the major function of each several part is as follows:
Presentation layer (client) is based on browser, and the man-machine interface of primary responsibility, namely providing the functions such as online visualizing monitor, pattern analysis, the inquiry of historical data and system remote control to user, is the window of exchange message between user and system.It can check legitimacy and the extent of competence of user, realized and the communicating of WEB server, and the upgrade maintenance of client-side program has no effect to other three layers by submission of sheet and Script Programming.
Functional layer (WEB server) completes concrete logic function, realizes the connection between presentation layer, data Layer and key-course and transfer of data.Be embodied in the request receiving client or bottom control server, call the logic function that corresponding module completes request, be also responsible for communicating with data Layer simultaneously, and request results is returned to request end.
Data Layer (Database Systems) is responsible for preserving various electrical network creation data, optimization system access mode, and the request of receiving function layer, operations such as realizing increasing historical data, delete, look into, the safety and stability that safeguards system is run.
Key-course (Control Server) is arranged on field apparatus end, be in charge of and the communicating of functional layer and data Layer, remote control command is realized to pass to physical equipment, change the running status of field apparatus, also can receive the request of controlled device simultaneously, realize the two-way connection of key-course and functional layer.
Described microgrid energy administrative unit is based on J2EE technology, and adopt SSI framework to carry out architecture design, four-tier model and interface-oriented programming are conducive to system and other B/S are integrated, achieves loose coupling and the extensibility of system.Adopt SVG to achieve on-line monitoring and the man-machine interaction of electrical network in conjunction with Ajax technology, and improve the ability of system data monitoring and analysis by the application of visualization technique.By the integration of RMI and JNI technology, solve the problem that Java and other system carry out communicating, establish EMS system remote Controlling model.Database design is carried out by adopting Target-oriented thought, make the management of electric network data more simple and clear, directly perceived, personnel's priority assignation of simultaneity factor ensure that the safety and stability of system cloud gray model, and friendly interface and easily operation also enhance the practicality of system.
As shown in Figure 3, energy management unit principal functional structure comprises online monitoring means, data base management system, remote control module, image analysis module and Back Administration Module, and modules all adopts existing mature technology.
Described on-line monitoring unit adopts SVG(Scalable Vector Graphics) in conjunction with AJAX(Asynchronous JavaScript and XML) technology completes man-machine interface design, realizes the on-line monitoring to micro-capacitance sensor and man-machine interaction.When user enters on-line monitoring unit subpage frame, HTML interface is automatically downloaded and is shown the SVG figure of monitored electrical network.Also define monitored grid variables in SVG winding diagram, read corresponding data by Ajax, for all monitored variablees, SVG can according to the value of the refreshing frequency regular update variable of predefined.
Described data base management system is mainly used in the store and management of micro-capacitance sensor data.Wherein historical data not only comprises the persistence preservation of all kinds of real time data, also comprise the calculating of the maximum of various engineering value, minimum value and mean value, and the time that all kinds of result of calculation occurs, also comprise according to all kinds of real-time parameter, produce the result of expression formula defined by the user and definition amount of calculation.Data base management system provides unified access interface for user, for the complete paired data of user increasing, delete, look into, the operation such as to change.
Described remote control module realizes operation of power networks optimum configurations and to functions such as the editorial managements of CONFIG.SYS, and user is connected by input IP address and port numbers and far-end server, and assigns controling parameters to bottom physical equipment.Because system initialization data are preserved mainly with XML file, correspondingly increase in design and the function such as online editing and storage is carried out to configuration file.
Described image analysis module realizes the graphic software platform to electrical network historical data, to compare and analyze in modes such as cake chart, block diagram and curve charts to electric network data.
Described Back Administration Module primary responsibility arranges each functional module of system and manages, and the system manager with corresponding authority can carry out editing and processing to personnel, authority, equipment and warning message etc.Back-stage management is a hinge module of whole system, because system information is stored in Database Systems more, what therefore Back Administration Module will realize with database is effectively mutual, comprise the establishment of various parameter list, for user provides interpolation, deletion, amendment and the various methods of data query table, and the running status of control system according to this.
The present invention is by being divided into different logical blocks by whole system, and the step that refinement systemic-function realizes, greatly reduces the cost of application system development and maintenance.Data access and logical operation are all focused in assembly, unified interface is externally provided, enhance the durability of system.Keep relatively independent function between each level, externally provide interface, undertaken communicating by interface between layers and the implementation of its inside need not be concerned about, being conducive to the degree of coupling of reduction system like this, improve autgmentability and the retractility of system.This functionalization, modular design are the very important methods controlling product cost, are also the strong guarantees of fast developing products, and the expansion of application more from now on provides conveniently.
Specific embodiment described herein is only illustrating spirit of the present invention; those skilled in the art can make various amendment to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present invention and essence, but these changes all fall into protection scope of the present invention.Therefore the technology of the present invention scope is not limited to above-described embodiment.
Claims (3)
1. an intelligent control system for microgrid, is characterized in that comprising microgrid energy administrative unit, central control unit and distributed control unit; Described central control unit is connected with microgrid energy administrative unit and distributed control unit respectively; Described microgrid energy administrative unit is for realizing the energy match of micro-capacitance sensor optimum; Described central control unit assigns instruction to distributed control unit according to the integrated operation control command of microgrid energy administrative unit; Described distributed control unit controls the work of generator unit or energy storage device;
Described microgrid energy administrative unit accepts the dispatching of power netwoks/control command of micro-capacitance sensor dispatching control center, and convert the integrated operation control command that central control unit can identify to, collect each subsystem operation information that each distributed control unit of process is uploaded simultaneously, assess current micro-capacitance sensor running status;
Described microgrid energy administrative unit provides data storing, supervision, control for micro-capacitance sensor dispatching control center, ensures the stable and high effective operation of micro-capacitance sensor; Adopt Ethernet interface between described microgrid energy management system and central control unit, follow IEC61850, IEC61499 agreement, realize micro-capacitance sensor equipment monitor and control, ensure the stable and high effective operation of micro-capacitance sensor; According to the actual conditions of equipment each in micro-capacitance sensor, the communication mode between micro-capacitance sensor central control unit and distributed control unit comprises RS485, CAN and Ethernet;
Microgrid energy administrative unit comprises presentation layer, functional layer, data Layer and key-course, and the function of each several part is as follows:
Presentation layer is based on browser, and be responsible for man-machine interface, namely providing online visualizing monitor, pattern analysis, the inquiry of historical data and system remote controlling functions to user, is the window of exchange message between user and system; Presentation layer can check legitimacy and the extent of competence of user, is realized and the communicating of WEB server by submission of sheet and Script Programming;
Functional layer realizes connection between presentation layer, data Layer and key-course and transfer of data; Namely receive the request of presentation layer or key-course, call the logic function that corresponding module completes request, be also responsible for communicating with data Layer simultaneously, and request results is returned to request end;
Data Layer is responsible for preserving various electrical network creation data, optimization system access mode, and the request of receiving function layer, realizes increasing historical data, deletes, looks into operation;
Key-course is in charge of and the communicating of functional layer and data Layer, and realizes remote control command to pass to physical equipment, changes the running status of field apparatus, also can receive the request of controlled device simultaneously.
2. intelligent control system for microgrid according to claim 1, is characterized in that described central control unit completes micro-capacitance sensor and runs control and pattern switching; By receiving the integrated operation control command of microgrid energy administrative unit, converting each subsystem instruction to, being handed down to distributed control unit and performing, realizing also/off-grid stable operation; Gather the real-time running data of each distributed control unit simultaneously, and be uploaded to microgrid energy administrative unit.
3. intelligent control system for microgrid according to claim 1, is characterized in that described distributed control unit accepts and performs the instruction that central control unit assigns, and controls generator unit or energy storage device and to drop into or out of service, drop into or excision load; And each subsystem operation information is uploaded to central control unit in real time.
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| CN103338359B (en) * | 2013-07-03 | 2017-03-15 | 国家电网公司 | Method towards the visual presentation of power distribution network |
| CN103368962B (en) * | 2013-07-10 | 2016-06-08 | 国家电网公司 | Based on the visual frame implementation method of distribution network |
| EP3095167B1 (en) | 2014-01-13 | 2018-04-18 | ABB Schweiz AG | Control of a stabilizing energy storage in a microgrid |
| CN103986188B (en) * | 2014-05-15 | 2016-05-04 | 国电南瑞科技股份有限公司 | A kind of micro-grid mode intelligent identification Method based on ternary formula |
| CN103997125B (en) * | 2014-05-22 | 2016-05-18 | 珠海许继电气有限公司 | A kind of multi-source power distribution network energy saving optimizing dispatching patcher |
| CN104113085A (en) * | 2014-08-05 | 2014-10-22 | 华东理工大学 | Micro-grid energy optimization management method |
| CN104166904A (en) * | 2014-09-01 | 2014-11-26 | 华电电力科学研究院 | Distributed energy management device and method supporting remote network terminal customer service software |
| CN104795845B (en) * | 2015-04-10 | 2018-05-01 | 南方电网科学研究院有限责任公司 | Independent micro-grid hybrid control method and system based on combination of peer-to-peer control and centralized control |
| CN104901313B (en) * | 2015-06-16 | 2017-07-25 | 北京亿利智慧能源科技有限公司 | Microgrid Voltage unbalance compensation method based on the Gossip communications of algorithms |
| CN105071431B (en) * | 2015-07-30 | 2019-02-15 | 国家电网公司 | A kind of control system of distributed power grid |
| CN105306327A (en) * | 2015-09-18 | 2016-02-03 | 北京德意新能电气有限公司 | Method for realizing microgrid control system based on high-speed Ethernet industrial bus |
| CN105356519A (en) * | 2015-12-07 | 2016-02-24 | 北京交通大学 | AC-DC hybrid micro power grid control method and apparatus |
| CN105958942A (en) * | 2016-05-13 | 2016-09-21 | 江苏中天科技软件技术有限公司 | WEB based photovoltaic power station monitoring system |
| CN109245303A (en) * | 2018-09-30 | 2019-01-18 | 天合光能股份有限公司 | Improved distributed micro-grid layered control method and system |
| CN113928155B (en) * | 2021-09-29 | 2023-08-18 | 西安交通大学 | Method for building ordered charging control system of electric automobile |
| CN116094002B (en) * | 2022-12-09 | 2024-08-23 | 国网上海市电力公司 | Rapid hierarchical coordination control method based on distributed battery energy storage system |
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| CN102355057A (en) * | 2011-09-25 | 2012-02-15 | 国网电力科学研究院 | Computer monitoring method for microgrid system |
| CN102710013B (en) * | 2012-05-23 | 2014-02-19 | 中国电力科学研究院 | Park energy-network energy optimizing management system based on microgrids and implementing method thereof |
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