CN102122162A - Microgrid central controller - Google Patents
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- CN102122162A CN102122162A CN2010106232432A CN201010623243A CN102122162A CN 102122162 A CN102122162 A CN 102122162A CN 2010106232432 A CN2010106232432 A CN 2010106232432A CN 201010623243 A CN201010623243 A CN 201010623243A CN 102122162 A CN102122162 A CN 102122162A
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Abstract
The invention discloses a microgrid central controller applicable to microgrid control. In the controller, the functions of communication management and programmable logic control are integrated. The functions mainly comprise the following aspects of: completing communication access of all distributed control power supply controllers and all intelligent equipment inside a microgrid by a site bus technology; performing a microgrid control strategy by a programmable logic control technology; completing the control functions of all distributed power supplies and equipment in the microgrid; and ensuring coordinated and ordered work of all the distributed power supplies in the microgrid. In the controller, the stability and the reliability of a microgrid control system are improved by taking various reliability design measures such as hardware, network redundancy and the like. Meanwhile, the controller is provided with various visualized debugging tools to improve the maintainability and the flexible accessibility of the microgrid control system.
Description
Technical field
The invention belongs to little power grid control technical field, be particularly related to the microgrid control system hardware platform is provided, on this platform, finish the design and the enforcement of microgrid control strategy.
Background technology
In energy shortage problem day by day serious today, people more and more pay attention to the energy rationally, effectively utilize.Microgrid system by distributed power source is formed has made full use of regenerative resource, has realized the cascade utilization of the energy, is more and more paid attention to by people.
Along with the widespread use of microgrid, the microgrid control technology becomes the emphasis of concern.Exist very big difference owing to form the distributed power source principle of work and the characteristic of microgrid system, control method is also different with the control requirement, so the microgrid control technology is had higher requirement.Can allow multiple distributed power source in microgrid and deposit, and can co-ordination be the key of microgrid control technology research.The distributed control power supply of forming the microgrid system simultaneously all disposes the mode that independent power electronic installation and control system interaction data all adopt communication, and the microgrid automated system need have powerful communication support function.
The general automatic mode that adopts of microgrid automated system is that HMI main website software directly inserts the distributed power source controller by communication mode at present, and the microgrid protection can directly insert main website, inserts main website again after also can concentrating by communication processor.This kind monitoring mode can only be finished conventional monitoring function, is generally used for the monitoring of uncontrollable distributed power source, and for example blower fan and photovoltaic etc. can not be implemented the coordination control strategy of microgrid.If when having controlled distribution formula power supply to exist in the microgrid, for example energy-storage travelling wave tube and controlled combustion machine etc., this mode is infeasible, need to increase controller, if adopt conventional P LC to control, because the restriction of controller self, the communication interface that provides is less relatively, key-course can't finish with microgrid in the data sharing of power-supply controller of electric, influence the enforcement of control strategy.
Comprehensive foregoing, we propose a kind of microgrid control technology that integrates telecommunication management and logic control.Invent a microgrid controller able to programme based on field bus communication, sort controller can be realized hierarchical control to the microgrid system according to microgrid system characteristics, significantly improves the stability of system, and can realize the plug-and-play feature of distributed power source.Make things convenient for engineering maintenance and expansion.
Summary of the invention
For solving the above problem that exists in the prior art, the invention discloses a kind of nonshared control unit that is applicable to microgrid control, this controller collection telecommunication management and FPGA (Field Programmable Gate Array) are controlled in one.
The present invention is specifically by the following technical solutions:
A kind of microgrid central controller comprises real-time database management module, communication management module, steering logic administration module, redundant processing module, fault-tolerant processing module and other functional processing modules; It is characterized in that:
Described controller is a core with real-time database management module, finishes the controller real-time data management, by automation interface, finishes the data interaction with communication management module, steering logic administration module, redundant processing module etc.;
Described communication management module comprises uplink communication administrative section and downlink communication administrative section, communication management module links to each other with the programming in logic instrument with master station by the uplink communication administrative section, function such as realize that real time data exchange, logic are uploaded, adorn under the logic, communication management module is connected to local bus by the downlink communication administrative section, described local bus also links to each other with intelligent I/O module, and the distributed power source controller links by field-bus interface and receives local bus;
The steering logic administration module is used to finish the steering logic operation, the real time data (analog quantity and switching value) that the steering logic operation needs comes from real-time storehouse, (steering logic is the control program of writing according to the demand of site of deployment to control output order after steering logic is carried out, different field requirement differences, steering logic difference, control output are also different, and control data is also different) give real-time storehouse after, be issued to opertaing device by the communication management module, drive topworks and finish control function;
Redundant processing module is finished redundancy determination, switching and the redundant synchronizing function of controller;
The fault-tolerant processing module is mainly finished the self check and the fault processing of controller;
Other functional block processing modules are finished auxiliary controller management function, comprise the management of time management, house dog, to the time management, configuration file management;
Controller is finished device data collections such as distributed power source controller, protective device and intelligence instrument by the field-bus interface card; the real time data that is aggregated into controller participates in the steering logic computing of controller by the steering logic administration module; the output result of logic operation; drive on-the-spot topworks by fieldbus or hard wired mode, finish control function.
The function that the present invention realized mainly comprises: finish the access of communicating by letter to all distributed control power-supply controller of electric of microgrid inside and all smart machines by field bus technique, by the FPGA (Field Programmable Gate Array) control technology, carry out the enforcement of microgrid control strategy; Finish control function to each distributed power source and equipment in the microgrid; Guarantee all distributed power source harmonious orderly work in the microgrid.Controller is by multiple reliability design means such as hardware and network redundancies, and it is reliable and stable to improve the microgrid control system.Controller is furnished with multiple visual debugging acid simultaneously, improves the maintainability and the flexible ease for use of microgrid control system.
Description of drawings
Fig. 1 is a microgrid central controller structural representation of the present invention;
Fig. 2 is a microgrid central controller bus access network synoptic diagram of the present invention;
Fig. 3 coordinates steering logic configuration figure for microgrid central controller microgrid of the present invention;
Fig. 4 is a microgrid central controller programming software functional diagram of the present invention;
Fig. 5 is microgrid central controller IEC 61131-3 algorithms library of the present invention (can buret reason control algolithm storehouse);
Fig. 6 is that microgrid central controller tailor-made algorithm of the present invention storehouse (is an economic optimum control algolithm piece, IEC61131-3FBD);
Fig. 7 is a microgrid central controller cycle logic task call process flow diagram of the present invention;
Fig. 8 is microgrid central controller of the present invention and HMI and third party's system communication structural drawing;
Fig. 9 is a microgrid central controller redundancy of effort mode principle of the present invention.
Embodiment
Below in conjunction with Figure of description technical scheme of the present invention is described in further detail.
Be illustrated in figure 1 as microgrid central controller structural representation of the present invention.Controller is made up of real-time database management module, communication management module, steering logic administration module, redundant processing module, fault-tolerant processing module and other functional processing modules etc.Database management module is the core of controller in real time, is responsible for the real time data management of controller, and the real-time data access interface is provided.Communication management module, steering logic administration module, redundant processing module can access interface be finished and the data interaction in storehouse in real time by calling.Communication management module is finished the communication function of controller, comprises uplink communication administrative section and downlink communication administrative section.The uplink communication administrative section is mainly finished communicating by letter of controller and master station software and programming in logic software.Controller adopts Fast Ethernet to be connected with the HMI main website, finishes the exchanges data of HMI main website and the real-time database management module of controller by the self-defined stipulations of controller.The communication of programming in logic software and controller adopts Ethernet or serial ports to be connected, and finishes communicating by letter of controller and programming in logic instrument by the private communication stipulations, and this function is mainly used in steering logic and uploads, plays dress and process data transmission etc.The downlink communication part is mainly finished the exchanges data with intelligent I/O module, bus interface card, controller is connected with the field-bus interface card with intelligent I/O module by internal bus, finish the collection of on-the-spot IO data by the DP stipulations, the real time data that collects, comprise the on-the-spot actual signal that intelligent IO fastener collects, the communication data that the field-bus interface card collects, be transferred to the real time data administration module by communication management module and preserve.The real time data administration module is saved in corresponding data area to the data that receive, and the read-write interface function that standard is provided is for other module invokes, for other module operations provide data source to support.Communication management module is finished real-time Data Transmission, and uplink communication is to deliver to master station from real-time storehouse reading of data, and downlink communication is to carry out data acquisition by local bus, delivers to real-time storehouse.Need the control command exported after logic is carried out, deliver to on-the-spot topworks, finish control function by downlink communication.Database management module manages the data in real-time library storage zone in real time, and access interface is provided, and other modules can read real time data by calling access interface, and database management module is by interface accessing, for other module operations provide data source in real time.The programming in logic instrument under the mode by communication installs to compiled steering logic file in the controller, calls execution by the steering logic administration module.Before steering logic is carried out, drive reading of data from real-time storehouse by the input I/O in the logic manage module, the output result after steering logic is carried out drives by output I/O and delivers to real-time storehouse.Controller is supported two CPU redundancies, and redundant processing module is finished redundancy determination, switching and the redundant synchronizing function of controller.Redundancy determination is to carry out the judgement of redundant switching condition according to the situation of the current operation of controller, and after controller produced hard error, logic operation mistake, communication network mistake, master controller produced handoff request.The redundant switching finished by controller hardware, is furnished with exclusive redundant bus on the controller back plate, master controller by redundant bus with the millisecond be unit period send heartbeat signal to spare controller.After master controller produces handoff request, switch to stand-by state, and stop to send heartbeat signal, after spare controller detects the heartbeat that sends less than master controller, just switch to master controller, send heartbeat signal simultaneously, so far active and standby controller is finished redundant the switching.Redundancy be synchronously the real time data of carrying out and steering logic for the consistance that guarantees active and standby microgrid controller data and steering logic synchronously.Master controller passes through redundant bus periodically to spare controller transmitting real-time data and steering logic file.
The fault-tolerant processing module is mainly checked the mistake that controller hardware, software and steering logic produce, and by erroneous trigger interface interchange error handler, finishes necessary fault processing function.Other function block can be finished some auxiliary controller management functions, for example time management, house dog management, to the time management, configuration file management etc.
Be illustrated in figure 2 as microgrid central controller bus access network synoptic diagram of the present invention, the microgrid central controller adopts advanced Field Bus Control Technology, the distributed power source controller is connected with controller with the form of other smart machines by the field-bus interface card, controller has been developed multiple bus interface card at present, support multiple standards fieldbus stipulations, for example: PROFIBUS, LonWorks, CAN etc.Also support 485 bus interface cards and ethernet network interface card simultaneously, can insert modbus, multiple standards stipulations such as 104, can also pass through the stipulations development interface, the self-defined stipulations of developing intellectual resource equipment.
Be illustrated in figure 3 as microgrid central controller programming software functional diagram of the present invention.Controller is finished the programming in logic of controller by special-purpose programming tool software Cyberlogic.Programming in logic software adopts graphical Logical Configuration mode, and major function comprises engineering management, algorithms library management, self-defined algorithms library encapsulation, debugging management, programming language, graphics process, program code management, resources configuration management, compiling management, logic analysis, automation interface, tubulature reason and telecommunication management etc. down.Cyberlogic software provides five kinds of programming languages that meet the IEC61131 standard fully, has under data management, programming in logic, code compile, the logic to adorn/upload and every functions such as logic debugging.CyberLogic software need with the supporting use of microgrid central controller, integrated management, configuration and dress function down to controller and IO plug-in unit.The logical edit function that the compiling administration module of CyberLogic is provided convenience for you: editor's guide, self routing, grammer highlight, intelligent perception etc.; Powerful grammar mistake measuring ability: alignment error position exactly, and set forth the reason of makeing mistakes; Abundant debug function: controller simulation, energy stream, logic analyzer, supervision/prescription, cross reference, do not shut down and revise code, breakpoint, operation/single step/tracking, pressure/covering etc.; Engineering management provides cipher protection function, can protection system avoid having a mind to of undelegated people or infringement unintentionally.
Be illustrated in figure 4 as microgrid central controller microgrid one key of the present invention and open machine along control Logical Configuration figure.Finish by starting step sequence algorithm piece STEP along the control function, logic does not have in system to accept the enabled instruction that controlling center is sent under the prerequisite of fault-signal, carries out the first step along control and opens the fuel main valve.After the STEP algorithmic block receives fuel main valve feedback signal, carry out to start going on foot second step of preface, start combustion machine fuel control valve.After the STEP algorithmic block receives combustion machine fuel control valve feedback signal, carry out the operation of the 3rd step startup combustion machine, start the operation of combustion machine ..., and the like, know that starting the step preface all finishes.The step preface can receive halt signal and reset signal in the process of carrying out, suspend the step preface or stop to go on foot preface and carry out.If the step preface is sent fault in the process of carrying out, the step preface can stop to carry out, and produces fault output.
Be illustrated in figure 5 as microgrid central controller IEC 61131-3 algorithms library of the present invention, this algorithms library mainly is made up of algorithms most in use piece and microgrid tailor-made algorithm piece, the algorithms most in use piece comprise mathematical algorithm (add, subtract, multiplication and division, trigonometric function etc.), logical algorithm (with or, non-, XOR etc.), time and counting algorithm (chronotron, counter etc.).Microgrid tailor-made algorithm storehouse comprises that microgrid starts step preface piece, distributed power source control algolithm storehouse, energy management control algolithm storehouse.The secondary encapsulation technology is supported in the control algolithm storehouse, and user's algorithms library that can use existing logic programming language encapsulation to satisfy the demands on existing platform also can pass through the algorithms library Core Generator, encapsulates the firmware algorithm storehouse that satisfies the demands by higher level lanquage.
Be illustrated in figure 6 as the economic optimum algorithmic block in the microgrid central controller energy management control algolithm piece of the present invention, the main algorithm that this algorithmic block adopts is a genetic algorithm, by each input data, comprise electrical load requirement, refrigeration duty demand, primary energy consumption amount, rate for incorporation into the power network, the next electricity price and Gas Prices etc., by calculating the instruction of exerting oneself of the combustion machine of output operating cost when minimum, give combustion machine controller control combustion machine and export.
Be illustrated in figure 7 as microgrid central controller cycle logic task call process flow diagram of the present invention, install in the controller under the compiled steering logic and move.Controller adopts the multitask running pattern of supporting, the logic task pattern has four kinds: periodic duty, response external incident, responding system incident, default operation, Fig. 7 is the process flow diagram of periodic task, the input I/O that logic brings into operation earlier by the steering logic administration module drives from real-time storehouse reading of data, carry out algorithm scanning according to the logic execution sequence, behind the algorithmic block end of scan, output I/O by the steering logic administration module drives, the result delivers in the real-time storehouse of controller logic output, is transferred to field control equipment by the communication management module.In the periodic duty implementation task monitor is arranged, the monitor task execution time is if task time exceeded message notification error processing module is carried out the fault handling output of user's appointment.
Be illustrated in figure 8 as microgrid central controller of the present invention and HMI and third party's system communication structural drawing, controller carries out exchanges data by Ethernet and HMI main website, third party system and HMI main website software adopts the private communication stipulations.Carry out exchanges data by pass-through mode with the third party system, adopt standard modbus, 104 or the User Defined stipulations communicate, carry out self-defined stipulations exploitation by automation interface.
Be illustrated in figure 9 as microgrid central controller redundancy of effort mode principle of the present invention, for guaranteeing the reliability of microgrid system, controller is supported two CPU redundancies, the double-network redundant design.Its function is finished by redundant processing module, comprises redundancy determination, switching and redundant synchronizing function.Redundancy determination is to carry out the judgement of redundant switching condition according to the situation of the current operation of controller, and after controller produced hard error, logic operation mistake, communication network mistake, master controller produced handoff request.The redundant switching finished by controller hardware, is furnished with exclusive redundant bus on the controller back plate, master controller by redundant bus with the millisecond be unit period send heartbeat signal to spare controller.After master controller produces handoff request, switch to stand-by state, and stop to send heartbeat signal, after spare controller detects the heartbeat that sends less than master controller, just switch to master controller, send heartbeat signal simultaneously, so far active and standby controller is finished redundant the switching.Redundancy be synchronously the real time data of carrying out and steering logic for the consistance that guarantees active and standby microgrid controller data and steering logic synchronously.Periodically to spare controller transmitting real-time data and steering logic file, can set as requested by synchronizing cycle by redundant bus for master controller.
Claims (4)
1. a microgrid central controller comprises real-time database management module, communication management module, steering logic administration module, redundant processing module, fault-tolerant processing module and other functional processing modules; It is characterized in that:
Described controller is a core with real-time database management module, finishes the controller real-time data management, by automation interface, finishes the data interaction with communication management module, steering logic administration module, redundant processing module;
Described communication management module comprises uplink communication administrative section and downlink communication administrative section, communication management module links to each other with the programming in logic instrument with master station by the uplink communication administrative section, function such as realize that real time data exchange, logic are uploaded, adorn under the logic, communication management module is connected to local bus by the downlink communication administrative section, described local bus also links to each other with intelligent I/O module, and the distributed power source controller links by field-bus interface and receives local bus;
The steering logic administration module is used to finish the steering logic operation, the real time data that the steering logic operation needs comes from real-time storehouse, after control output order after steering logic is carried out is given real-time storehouse, be issued to opertaing device, drive topworks and finish control function by the communication management module;
Redundant processing module is finished redundancy determination, switching and the redundant synchronizing function of controller;
The fault-tolerant processing module is mainly finished the self check and the fault processing of controller;
Other functional block processing modules are finished auxiliary controller management function, comprise the management of time management, house dog, to the time management, configuration file management;
Controller is finished device data collections such as distributed power source controller, protective device and intelligence instrument by the field-bus interface card; the real time data that is aggregated into controller participates in the steering logic computing of controller by the steering logic administration module; the output result of logic operation; drive on-the-spot topworks by fieldbus or hard wired mode, finish control function.
2. microgrid central controller according to claim 1; it is characterized in that: controller adopts field bus technique; support the fieldbus stipulations of multiple standards; the modbus stipulations that comprise PROFIBUS, LonWorks, CAN and standard are by the distributed power source controller in the field-bus interface card connection access microgrid system, protective device, intelligence instrument etc.
3. microgrid central controller according to claim 2, it is characterized in that: controller adopts control technology able to programme, adopt patterned Logical Configuration mode and the FBD linguistic norm that meets the IEC61131-3 standard, according to microgrid system control logic and control algolithm programming; Design of Controller the multiple algorithmic block of microgrid that is applicable to formed the controller algorithm storehouse, wherein said algorithmic block comprises that distributed power source starts step preface logic, energy management control algolithm, distributed power source control algolithm piece etc.
4. microgrid central controller according to claim 3 is characterized in that: the secondary encapsulation technology is supported in the controller algorithm storehouse, can encapsulate algorithms library voluntarily according to on-the-spot needs programming personnel; Both can on existing platform, use existing logic programming language to carry out the algorithms library encapsulation, also can pass through tailor-made algorithm storehouse Core Generator, and use the higher level lanquage encapsulation to carry out the algorithms library encapsulation.
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| CN103595138A (en) * | 2013-11-21 | 2014-02-19 | 国网上海市电力公司 | Smart micro-grid system |
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| CN112097371A (en) * | 2020-10-14 | 2020-12-18 | 烟台鼎钰电子科技有限公司 | Central air-conditioning host control system realized based on distributed unit controller |
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