CN202651896U - Coordinated control system of micro power grid - Google Patents
Coordinated control system of micro power grid Download PDFInfo
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- CN202651896U CN202651896U CN2012202884427U CN201220288442U CN202651896U CN 202651896 U CN202651896 U CN 202651896U CN 2012202884427 U CN2012202884427 U CN 2012202884427U CN 201220288442 U CN201220288442 U CN 201220288442U CN 202651896 U CN202651896 U CN 202651896U
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- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 10
- 238000007689 inspection Methods 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000004146 energy storage Methods 0.000 description 1
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S40/124—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 using wired telecommunication networks or data transmission busses
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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
- Y04S40/128—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 involving the use of Internet protocol
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Abstract
The utility model provides a coordinated control system of a micro power grid. The coordinated control system of the micro power grid includes an energy management system, a main controller and a terminal unit. The energy management system and the main controller are in communication connection by adopting TCP/IP. The main controller and the terminal unit are in communication connection by adopting an EtherCAT bus. According to the utility model, a scheme of the coordinated control system of the micro power grid based on the EtherCAT bus is proposed according to the defects of a prior micro power grid control system, thereby improving the digitization and timeliness of the coordinated control system of the micro power grid.
Description
Technical field
The utility model belongs to field of power, is specifically related to a kind of micro electric network coordination control system.
Background technology
Little electric power network technique, because the actual national conditions of various countries and development are different, the little electrical network concept and the developing goal that provide are not quite similar.The concept of little electrical network is wherein proposed the earliest, also be in numerous little electrical networks definition relatively one of authority be the definition of little electrical network of proposing of U.S. electric reliability engineering solution association: little electrical network is by micro power (less than or equal to 500kW) and the common system that forms of load based on power electronic technology, it can provide electric energy and heat simultaneously, realizes cogeneration; The power supply of little electrical network inside mainly contains power electronic device and is responsible for power conversion, and necessary control is provided; Little electrical network shows as single controlled cell with respect to the large electrical network in outside, and can satisfy simultaneously the user quality of power supply and power supply safety are reliably waited requirement.
The operational mode of little Flexible Power Grid and high-quality power supply service be unable to do without and improve stable control system.In the micro electric network coordination control of reality; the information such as the electric current that need real time record distributed power source detection and control terminal, the slave stations such as protecting detection and control terminal that is incorporated into the power networks collects, voltage, power; and these information need to be sent to main website in real time; simultaneously; main website also wants in time the information that gathers to be carried out analyzing and processing, and to the slave station transmitting control parameters.Retrained by little electrical network site environment, the distance between the master station and follow station is often distant, and traditional field bus technique can't guarantee the real-time of signal transmission.So existing microgrid control system has adopted 2 kinds of methods to solve the above problem that exists, a kind of is the simplest method, exactly the switching values such as the analog quantity such as electric current, voltage and circuit breaker position are directly received main website by cable, but this method need to be laid a large amount of cables, wiring is complicated; Another kind method is the control method for coordinating that adopts main website control decision and slave station control decision to separate, but that this method exists systematicness is poor, and the time difference that exists between the master station and follow station, may cause two kinds of the principals and subordinates conflicting shortcomings of making a strategic decision.
The utility model content
For overcoming defects, the utility model provides a kind of micro electric network coordination control system, deficiency according to existing little grid control system has proposed the scheme based on the micro electric network coordination control system of EtherCAT bus, with digitlization and the real-time that improves little grid control system.
For achieving the above object, the utility model provides a kind of micro electric network coordination control system, and it comprises: it comprises: EMS, master controller and terminal unit; Adopt TCP/IP to communicate connection between described EMS and the described master controller; Its improvements are, described master controller is connected the EtherCAT bus to communicate connection with terminal unit.
In the optimal technical scheme provided by the invention, terminal unit comprises the point terminal that is incorporated into the power networks, main power source terminal, loaded termination, distribution power terminal and the environmental monitoring terminal that connects successively; Adopt the EtherCAT bus to communicate connection between described each terminal.
In the second optimal technical scheme provided by the invention, described each terminal comprises respectively: communication control unit, application processing unit, number of modules converting unit and I/O interface; Described application processing unit communicates with described communication control unit, described number of modules converting unit and the I/O interface of being connected respectively and is connected.
In the 3rd optimal technical scheme provided by the invention, described communication control unit comprises: DPRAM and communication interface modules; Described DPRAM communicates with described application processing unit and is connected; Described communication interface modules communicates by EtherCAT bus and described master controller or adjacent terminal and is connected; It is the chip of ET1100 that described communication control unit adopts model.
In the 4th optimal technical scheme provided by the invention, described application processing unit is realized the collection of electric current, voltage analog by described number of modules converting unit, finish the collection of switching value and the output of control signal by described I/O interface; It is the chip of TMS320C28335 that described application processing unit adopts model; It is the analog to digital converter of ADS8556 that described number of modules converting unit adopts model.
In the 5th optimal technical scheme provided by the invention, described master controller comprises: control module and the interface module that communicates with respectively and human-computer interface module.
In the 6th optimal technical scheme provided by the invention, described control module comprises ethernet port and DVI interface; Described control module communicates by ethernet port and described EMS; Described interface module comprises: two RJ45 interfaces that are set up in parallel, select two RJ45 interfaces in one communicate with described terminal unit by the EtherCAT bus and to be connected; Described control module communicates by DVI interface and described human-computer interface module; It is the embedded controller of CX1020 that described control module adopts model; Described human-computer interface module is 17 cun touch-screen.
In the 7th optimal technical scheme provided by the invention, EMS is server.
Compared with the prior art, a kind of micro electric network coordination control system that the utility model provides, adopt the EtherCAT bus as the communication construction of microgrid coordinated control system, satisfied the real-time of microgrid coordinated control system, need not the switching values such as the analog quantitys such as the electric current of each dispersing apparatus in the micro-grid system, voltage and circuit breaker position are connected to central controller by cable, reduce the laying of cable, simplified the mode of connection, realized the digitlization of whole micro-grid system; And, satisfied the centralized control decision-making to the requirement of real-time of whole micro-grid system control, avoided causing owing to life period between the master station and follow station is poor conflict between main website control decision and the slave station control decision.
Description of drawings
Fig. 1 is the example structure figure based on the micro electric network coordination control system of EtherCAT bus.
Fig. 2 is as the microgrid of the EtherCAT slave station example structure figure of terminal on the spot.
Fig. 3 is the communication scheme of the micro electric network coordination control system of EtherCAT bus.
Fig. 4 is master controller hardware structure embodiment schematic diagram.
Fig. 5 is the hardware structure embodiment schematic diagram of single terminal.
Embodiment
The technical solution of the utility model is as follows: the micro electric network coordination control system based on the EtherCAT bus is comprised of master controller and various terminal, master controller be connected terminal and adopt the EtherCAT bus to communicate connection, master controller is connected TCP/IP to communicate connection with the upper strata EMS.As shown in Figure 1.
Master controller adopts the ethernet nic NIC (Network Interface Card) of standard as the main website hardware interface as the main website of EtherCAT usually, adopts PC or embedded controller as hardware foundation.Its function then realizes by software.Software section comprises Basic application and application program two parts.Basic application is mainly finished the basic functions such as initialization, topological structure identification, parameter setting, data demonstration and storage; Application program makes decisions mainly for the operation conditions of little electrical network, and the adjusting control command after the decision-making issued each terminal on the spot by the EtherCAT bus, mainly comprise microgrid be incorporated into the power networks decision-making process, islet operation decision-making process, be incorporated into the power networks turn the isolated island decision-making process, isolated island turns the decision-making process etc. that is incorporated into the power networks.
Terminal is as the slave station of EtherCAT on the spot, and hardware mainly is comprised of slave station control ESC chip, application layer cpu chip etc., as shown in Figure 2.The ESC chip is mainly realized the exchanges data with the EtherCAT bus, and the application layer cpu chip is mainly realized AD sampling, data calculating and processed, opens into functions such as signal processing, control outlets.According to the difference of the object in the connecing micro-grid system, can be divided into the point terminal that is incorporated into the power networks, main power source terminal, loaded termination, distribution power terminal, environmental monitoring terminal etc.
The point terminal that is incorporated into the power networks refers to the terminal corresponding with the point breaker that is incorporated into the power networks, and can gather the analog quantity such as voltage, electric current, frequency of the circuit breaker both sides of being incorporated into the power networks (being major network side and microgrid side); Gather the intakes such as circuit breaker position; Possess to the point breaker that is incorporated into the power networks divide, the control of closing function outlet; Possess defencive function, can judge fault and the excision of major network side or microgrid side; Possess the same period of inspection, inspection with no pressure closing function.
The main power source terminal mainly is for the function of moving energy storage device or the fuel cell of bearing main power source function in the FV mode at microgrid during at islet operation, possess the analog quantitys such as the voltage that gathers main power source, electric current, power; Can collect the intakes such as the running status of main power source and operational mode; Possess the control main power source starts, stop, by the PQ mode switch to the FV mode, the control that switches to the PQ mode by the FV mode exports.
Have a plurality ofly in microgrid of loaded termination, corresponding to each the road on-load switch in the microgrid, gather the analog quantitys such as electric current, voltage, power of load; Gather the switching values such as position of on-load switch; Possesses the control outlet that the control overhead switch divides, closes.
Also having a plurality ofly in microgrid of distributed electrical source terminal, is power supply corresponding to other each branch except main power source, can be divided into according to the kind of corresponding distributed power source: photovoltaic generation terminal, wind power generation terminal, fuel cell terminal etc.The function of the analog quantitys such as the voltage of distributed electrical source terminal collection distributed power source, electric current, power; Can collect the intakes such as running status of distributed power source; Possesses the control outlet that the control distributed power source starts, stops.
The environmental monitoring terminal is corresponding to environmental monitoring system, is mainly used in the environmental parameters such as temperature that the reception environment monitoring system measures, humidity, solar irradiance, wind-force.
Based on the Principle of Communication of the micro electric network coordination control system of EtherCAT bus as shown in Figure 3, master controller is as the EtherCAT main website, be responsible for initiation and the control of message, the maximum valid data length of message is 1498 bytes, and data travel through all on the spot terminal equipments.Terminal equipment is as the EtherCAT slave station on the spot, be not that the storage packet is processed afterwards again, but at downlink message through out-of-date, according to the position of the appointment in heading extracted data or with data data inserting frame from Frame, simultaneously with message transmissions to next one terminal on the spot.Arrive last terminal of system logic position when message after, the message after this terminal will be processed returns to master controller as uplink message.This communication process is finished by the ESC chip entirely, processes time-delay and only has about 10ns, compares with traditional Ethernet, and real-time is greatly improved.
The below is explained in further detail embodiment of the present utility model, and the present embodiment is implemented under the technical solutions of the utility model prerequisite, has provided detailed embodiment, but protection range of the present utility model is not limited to following embodiment.
The present embodiment selects the embedded controller CX1020 of BECKHOFF company as the hardware platform of master controller, and this controller adopts Intel Celeron processor, configuration 256MB internal memory, 2GB CF card, WinCE operating system.CX1020 carries a DVI interface, connects a touch-screen of 17 o'clock as man-machine interface by this DVI interface.CX1020 carries two Ethernet interfaces, selects one of them Ethernet interface to be connected with the upper strata EMS by TCP/IP.Alternative is joined the EK1122 module of a BECKHOFF company, and this module is EtherCAT topology Interface Terminal module, has two RJ45 interfaces, and selecting wherein, 1 interface is connected by the IN network interface of netting twine with the 1st EtherCAT substation.The hardware platform of main website as shown in Figure 4.
The TwinCAT software of master controller choice of software BECKHOFF company is as the Master Station Software of EtherCAT, TwinCAT is inner integrated EtherCAT protocol stack and real-time kernel.The main platform of TwInCAT is system administration manager, can read the functions such as EtherCAT slave node, DC clock synchronous, topological structure, configuration slave station parameter, real time inspection slave station IO amount by system administration manager.The configuration information of TwinCAT exists with the form of XML file, and built-in XML interpreter is divided into main website configuration file and slave station configuration file.Can set network segment parameter, the order of carrying out when starting, the basic configuration of slave station, the configuration of running environment etc. in the main website configuration file; The slave station configuration file can be set initial configuration and the slave station information of slave station, downloads to slave station after explaining.
Terminal selects the ET1100 chip of BECKHOFF company as EtherCAT slave station control ECS chip as the EtherCAT slave station on the spot, has realized physical layer and the data link layer of EtherCAT slave station agreement.This chip has 4 physical communication ports, supports the full-duplex communication of 100Mbit/s, and inside has the DPRAM of 8KB to be used for and application layer CPU swap data.The application layer cpu chip of slave station is selected the dsp chip TMS320C28335 of TI company, and this chip is a 32 floating type CPU, has the RAM of 68KB and the Flash of 512KB, 12 AD, and disposal ability is very strong.On the one hand, TMS320C28335 is connected with the DPRAM of ET1100 by bus mode, and both sides are by the DPRAM exchange and share data.On the other hand, TMS320C28335 realizes the collection of the analog quantitys such as the electric current, voltage of terminal on the spot by the AD sampling circuit, finish the collection of switching value and the outlet of control signal by the IO interface loop.The hardware structure of terminal as shown in Figure 5 on the spot.
What need statement is that the utility model content and embodiment are intended to prove the practical application of technical scheme that the utility model provides, and should not be construed as the restriction to the utility model protection range.Those skilled in the art can do various modifications, be equal to and replace or improve under spirit of the present utility model and principle inspiration.But these changes or modification are all in the protection range that application is awaited the reply.
Claims (8)
1. micro electric network coordination control system, it comprises: EMS, master controller and terminal unit; Adopt TCP/IP to communicate connection between described EMS and the described master controller; It is characterized in that, described master controller is connected the EtherCAT bus to communicate connection with terminal unit.
2. system according to claim 1 is characterized in that, terminal unit comprises the point terminal that is incorporated into the power networks, main power source terminal, loaded termination, distribution power terminal and the environmental monitoring terminal that connects successively; Adopt the EtherCAT bus to communicate connection between described each terminal.
3. system according to claim 2 is characterized in that, described each terminal comprises respectively: communication control unit, application processing unit, number of modules converting unit and I/O interface; Described application processing unit communicates with described communication control unit, described number of modules converting unit and the I/O interface of being connected respectively and is connected.
4. system according to claim 3 is characterized in that, described communication control unit comprises: DPRAM and communication interface modules; Described DPRAM communicates with described application processing unit and is connected; Described communication interface modules communicates by EtherCAT bus and described master controller or adjacent terminal and is connected; It is the chip of ET1100 that described communication control unit adopts model.
5. system according to claim 3 is characterized in that, described application processing unit is realized the collection of electric current, voltage analog by described number of modules converting unit, finish the collection of switching value and the output of control signal by described I/O interface; It is the chip of TMS320C28335 that described application processing unit adopts model; It is the analog to digital converter of ADS8556 that described number of modules converting unit adopts model.
6. system according to claim 1 is characterized in that, described master controller comprises: control module and the interface module that communicates with respectively and human-computer interface module.
7. system according to claim 6 is characterized in that, described control module comprises ethernet port and DVI interface; Described control module communicates by ethernet port and described EMS; Described interface module comprises: two RJ45 interfaces that are set up in parallel, select two RJ45 interfaces in one communicate with described terminal unit by the EtherCAT bus and to be connected; Described control module communicates by DVI interface and described human-computer interface module; It is the embedded controller of CX1020 that described control module adopts model; Described human-computer interface module is 17 cun touch-screen.
8. system according to claim 1 is characterized in that, EMS is server.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012202884427U CN202651896U (en) | 2012-06-15 | 2012-06-15 | Coordinated control system of micro power grid |
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| CN2012202884427U CN202651896U (en) | 2012-06-15 | 2012-06-15 | Coordinated control system of micro power grid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709949A (en) * | 2012-06-15 | 2012-10-03 | 中国电力科学研究院 | Micro-grid coordinated control system |
| CN108306804A (en) * | 2018-01-26 | 2018-07-20 | 中科新松有限公司 | A kind of Ethercat main station controllers and its communication means and system |
| CN108345236A (en) * | 2017-01-25 | 2018-07-31 | 上海电气集团股份有限公司 | A kind of control system based on EtherCAT |
-
2012
- 2012-06-15 CN CN2012202884427U patent/CN202651896U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709949A (en) * | 2012-06-15 | 2012-10-03 | 中国电力科学研究院 | Micro-grid coordinated control system |
| CN108345236A (en) * | 2017-01-25 | 2018-07-31 | 上海电气集团股份有限公司 | A kind of control system based on EtherCAT |
| CN108306804A (en) * | 2018-01-26 | 2018-07-20 | 中科新松有限公司 | A kind of Ethercat main station controllers and its communication means and system |
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Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140321 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140321 |
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Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
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Effective date of registration: 20140321 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
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Granted publication date: 20130102 |