CN202586493U - Micro electrical network energy management system - Google Patents
Micro electrical network energy management system Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/76—Power conversion electric or electronic aspects
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- 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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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Abstract
The utility model provides a micro electrical network energy management system which is suitable for micro electrical network energy management and provides monitoring and control functions for a micro electrical network system which comprises distributed power supply and energy storage units such as wind power generation, photovoltaic generation, minimized gas turbines etc. The energy management system can monitor running states of a whole micro electrical network, makes corresponding optimal control strategies according to current electrical network running conditions and external application requests, employs reasonable energy management optimization technique to utilize the distributed power supply as fully as possible according to power output characteristics of the distributed power supply and fully exploits low carbon and economic advantages of the micro electrical network.
Description
Technical field
The utility model patent relates to a kind of EMS that is applicable to little electrical network, belongs to little electric network synthetic technical field of automation.
Background technology
New century, Renewable Energy Development has become the important behave of problems such as international community reply energy crisis, environmental protection and natural calamity.Distributed power generation is as a kind of important form of renewable energy utilization, at world wide obtained development fast.The extensive access of distributed power generation has brought new problem to the operation and the management of conventional electric power system; And little electrical network can be realized effectively integrating and flexible, intelligent control to distributed power generation; Be to solve be incorporated into the power networks a kind of important techniques means of problem of distributed power generation, obtained common attention in recent years.
Little electrical network is the important part of intelligent grid as a kind of technological means that the close friend who promotes regenerative resource inserts.In recent years; China's energy industry increases the degree of concern of little electrical network day by day; At present existing a plurality of business units have carried out the construction of little electrical network pilot project, and in commercial block, all there is the planning pilot in intelligent residential district, industrial building and remote farming and pastoral area, some projects are built up and put into operation.The variation of scene resource, distributed power source, energy-storage units and power load has higher requirement for the automatically-monitored technology of little electric network synthetic.
The utility model content
The microgrid energy management system will be kept watch on equipment running status in whole little electrical network; Formulate corresponding operation control strategy according to current running situation and extraneous application request; The characteristics of exerting oneself to distributed power source; Adopt reasonable energy management optimization technology that distributed power source is maximized the use, give full play to the advantage of little electrical network low-carbon (LC), economy.
To achieve these goals; The present invention adopts following technical scheme: a kind of microgrid energy management system is characterized in that: the micro-grid system that contains wind power generation, photovoltaic generation, miniature gas turbine distributed power supply and energy-storage units provides to be kept watch on and controlled function.The microgrid energy management system through network mode and little electrical network each on the spot controller communicate, receive the various service datas that little electrical network send on the controller on the spot, carry out the processing and the storage of data, and graphical display function; Issue the scheduling controlling order to each relevant controller on the spot of little electrical network simultaneously, or issue Power Exchange plan curve, or issue the operation control strategy, to little electrical network each on the spot the operation of controller coordinate and manage.A plurality of micro-grid systems can managed and coordinate to a microgrid energy management system, realizes the coordinated operation controlled function between a plurality of little electrical networks.Microgrid energy guard system and dispatching of power netwoks/supervisory control system communicate; Transmit the relevant operation information of little electrical network to dispatching of power netwoks/supervisory control system; Receive the various scheduling and the control command of dispatching of power netwoks/supervisory control system simultaneously; And Power Exchange plan curve, and carry out control command or issue the Power Exchange curve through the microgrid energy guard system.
This microgrid energy management system can be kept watch on equipment running status in whole little electrical network; Can also formulate corresponding Optimal Control Strategy according to current micro-grid system ruuning situation and extraneous application request; The characteristics of exerting oneself to distributed power source; Adopt reasonable energy management optimization technology that distributed power source is maximized the use, give full play to the advantage of little electrical network low-carbon (LC), economy.
Description of drawings
Below in conjunction with accompanying drawing patent of the present invention is further described.
Fig. 1 is the little electric network composition figure of typical 400V low-voltage bus bar.
Fig. 2 is three layers of little grid monitoring system exemplary block diagram.
Fig. 3 is two-layer little grid monitoring system exemplary block diagram.
Embodiment
Explanation of nouns
Distributed power generation typically refers near efficient, the reliable generator unit of generated output several kilowatts of small modular, the distributings to hundreds of megawatts are arranged in the user.Mainly comprise: being internal combustion engine, miniature gas turbine, solar power generation (photovoltaic generation, photo-thermal power generation), wind power generation, biomass power generation of fuel etc. with liquid or gas, is main with photovoltaic generation and wind power generation mainly in China.
Little electrical network is a kind of low-pressure system of being made up of jointly distributed power generation, energy storage and load.The inner power supply of little electrical network is mainly realized the conversion of electric energy by power electronic equipment, and essential control is provided.Little electrical network shows as single autonomous controlled cell with respect to external electrical network, can satisfy the demand of user to the quality of power supply and power supply safety aspect simultaneously.
Energy storage technology mainly contains physics energy storage (like pumped storage, compressed-air energy storage, flywheel energy storage etc.), chemical energy storage (like all kinds of storage batterys, lithium battery, fuel cell, flow battery, ultracapacitor etc.) and electromagnetism energy storage (like superconducting magnetic energy storage etc.) etc.Energy-storage system generally is made up of the two large divisions: energy storage device of being made up of energy-storage travelling wave tube and the electrical network access device of being made up of power electronic device.Energy storage device is mainly realized storage, release or the fast power exchange of energy.The electrical network access device is realized energy bi-directional and the conversion between energy storage device and the electrical network, realizes functions such as power peak regulation, energy source optimization, raising power supply reliability and stability of power system.
Little electrical network controller on the spot is made up of to the monitoring and protection equipment and the distributed power source controller of load and circuit all; Specifically comprise load governor, distributed power generation cell controller, energy storage controller; When little electrical network leaves network operation, little electrical network controller on the spot also will comprise the main power source controller.
Reactive power compensation is called for short reactive power compensation, in electric power system, works to improve the power factor of electrical network, reduces the loss of supply transformer and conveying circuit, improves power supplying efficiency, improves the power supply environment.
The weather environment monitoring function is generally accomplished by miniature weather station, to on-site real-time temperature, humidity, wind speed, wind direction, air pressure, solar radiation amount, sunshine time, rainfall etc. is monitored with the weather environment of little grid generation strong correlation.Little operation of power networks environmental parameters such as photovoltaic module temperature are accomplished by corresponding measurement mechanism.
Active filter (APF) is to utilize to turn-off power electronic device, produce with load current in harmonic component equal and opposite in direction, electric current that phase place is opposite offset the filter of the harmonic current that causes by the electronic power conversion device in the micro-grid system.
SCADA (Supervisor Control And Data Acquisition), i.e. data acquisition and monitoring system are the bases of little grid automation control.
The little electric network composition of typical case's 400V low-voltage bus bar
Fig. 1 is a little electric network composition figure of typical 400V low-voltage bus bar, comprises the distributed power generation unit, energy-storage system, and load, the switch that is incorporated into the power networks, equipment for monitoring power quality, environmental monitoring, supervisory control systems etc. are partly formed.In the typical little electric network composition of 400V low pressure; All distributed power sources, energy storage, reactive-load compensator, customer charge all are connected to low pressure 400V bus; And connect with outside power distribution network through the switch that is incorporated into the power networks, can realize from the net and the taking over seamlessly between the pattern of being incorporated into the power networks.
Structurally, little electrical network can be regarded as by some " branch roads " and forms.Branch road is meant and comprises the physical equipment set that a 400V low pressure inserts switch, a main equipment (photovoltaic DC-to-AC converter, general convertor, energy accumulation current converter, load, APF, reactive-load compensator, equipment for monitoring power quality, public interface) and auxiliary device (electric energy meter).Branch road is the logical combination of relevant device, and the proposition of branch road mainly is in order equipment logically to be divided into groups, to be convenient to the monitoring analysis and the application function realization of little electrical network.
Mostly distributed power generation unit in little electrical network is Miniature Power Unit, and they are connected on user side, has characteristics such as cost is low, voltage is low, low emission.It mainly can be divided into two types, and one type is the unit of the distributed power source that inserts through the power electronics interface (< 100kW), like photovoltaic generation; Wind power generation, energy storage device etc., another kind of is slewing; Directly be incorporated into the power networks in a conventional manner, like split shaft miniature gas turbine, diesel engine etc.For the maximum use clean energy resource, photovoltaic generation, wind power generation are generally all worked by the peak power output mode, so its size of exerting oneself is only relevant with resource situation, generally forced partial outage not.In addition, the quality of power supply should satisfy relevant national standard in little electrical network, and active filter and reactive power compensator are set in little electrical network, respectively the quality of power supply and reactive power in little electrical network is reasonably regulated.
Energy storage device in little electrical network is main with energy type battery energy storage device, and is in some occasion, in order to satisfy special user's quality of power supply demand, auxiliary with super capacitor, flywheel constant power type energy storage device.When little electrical network was incorporated into the power networks, energy storage device was stabilized photovoltaic, wind power generation goes out fluctuation, regulates little electrical network and site Power Exchange under the control of microgrid energy management system.When the network operation, energy storage device is as from the power-balance unit of net system at little electrical network, remedy to exert oneself in the distributed power generation unit and power load between power difference, keep little power grid operation.Main power source when energy storage device also leaves network operation as little electrical network, voltage when providing system to leave network operation and frequency are in performance voltage and FREQUENCY CONTROL effect in network operation.
Power load in little electrical network is according to its significance level, but can it be divided into cutting load, controllable burden and sensitive load.Sensitive load is had relatively high expectations to the quality of power supply, requires little electrical network that continuous uninterrupted power supply is provided; Controllable burden is accepted control, can interruption of power supply under the situation of necessity, and out of service; But cutting load is meant that some to the less demanding load of power supply reliability, can excise at any time.With regard to Fig. 1; Generally speaking, sensitive load and controllable burden power reguirements are higher, during outside distribution network failure; And the switch that is incorporated into the power networks at place, site can quick acting make important load and Fault Isolation and uninterrupted normal power supply; But and cutting load, system then can be according to the demand of network power balance, when being necessary excision.
The position at little electrical network and place, site is typically chosen in the low-pressure side of distribution transformer or the tie point place of major network and little electrical network.And site place, be provided with equipment for monitoring power quality, guarantee little electrical network and site each item technical indicator satisfy the requirement of correlation technique standard.
Little electrical network electric energy quality monitoring system is made up of the equipment for monitoring power quality that is installed in each branch road, in time collects on the quality of power supply information of each bar branch road and delivers to little grid monitoring system, supplies it to make correct strategy.In view of little electric network composition shown in Figure 1; All devices all is connected in parallel on the same bus, and its voltage levvl is identical, so equipment for monitoring power quality is monitored busbar voltage quality of power supply level at the bus place; On each branch road, the monitoring point is set, monitors the flow through quality of power supply level of electric current of each branch road.Little electrical network electric energy quality monitor is collected little electrical network quality of power supply real time data, on deliver to little grid monitoring system.
Microgrid energy management system demand
The major function of this microgrid energy management system is divided into four major parts, data acquisition and monitoring function, operation controlled function, optimal control function and advanced analysis function.
(1) data acquisition and monitoring function
Main service data collection, service data processing, formula calculating, alarming processing, picture demonstration, curve display, simple control, report printing, clock synchronization, rights management, topology coloring and the web page browsing function of accomplishing little electrical network.
Little electrical network can be regarded as by wind power generation branch road, photovoltaic generation branch road, energy storage branch road, reactive power compensation branch road, load branch circuit, active power filtering branch road, the branch road etc. that is incorporated into the power networks, and all branch roads compile through the 400V bus.The information of all devices all is to deliver to little grid monitoring system in the unit with the branch road, and concrete data are following:
(a) photovoltaic branch road:
Direct current header box/cabinet: battery strings direct voltage, electric current, power, direct current header box busbar voltage, electric current, state;
Photovoltaic DC-to-AC converter: each inverter DC input voitage, electric current, ac output voltage, electric current, frequency, harmonic wave, clock, inverter state; The interchange cabinet attitude of confluxing;
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, day energy output, accumulated generation amount, electric energy meter state;
(b) wind-powered electricity generation branch road
Controller of fan: rotor speed, wheel speed, yaw direction is transferred the vane angle degree, output AC voltage, electric current, frequency, current active power, reactive power, the power factor sent, blower fan sends total electric weight, fan condition;
Blower fan inverter: each inverter DC input voitage, electric current, ac output voltage, electric current, frequency, harmonic wave, clock, inverter state; The interchange cabinet attitude of confluxing;
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, day energy output, accumulated generation amount, electric energy meter state;
(c) energy-storage system branch road
Battery pile: each battery case average voltage and temperature in positive and negative busbar insulation against ground value, battery strings electric current, each battery strings efficient and cycle-index, battery pile charge/discharge electricity amount and residual capacity thereof and active volume, battery strings charge/discharge electricity amount and residual capacity thereof and active volume, the battery strings
Two way convertor: AC side output three-phase voltage, three-phase current, output electric weight, power output, active power of output, the meritorious electric weight of output, output reactive power, output capacity of idle power, AC side power factor, dc voltage, DC side electric current, DC side power, DC side charge volume, DC side discharge capacity, reversible transducer efficient, operating state (opening/stop), operational mode (and from net), running status (discharging and recharging).
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, day energy output, accumulated generation amount, electric energy meter state;
(d) miniature gas turbine branch road
Miniature gas turbine body: fuel air amount, rotor speed, output voltage, electric current, power factor, power output, generator state, cooling and heating machine air displacement, power output, cooling and heating machine state, fuel gas temperature, combustion machine working temperature;
Two way convertor: each converter DC input voitage, electric current, ac output voltage, electric current, frequency, harmonic wave, clock, converter device state; The interchange cabinet attitude of confluxing;
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, day energy output, accumulated generation amount, electric energy meter state;
(e) load branch circuit
The load assembly: load side voltage, electric current, power factor, current load, load per hour, every day load, current load prediction value, load condition, each unit state of load point;
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, day energy output, accumulated generation amount, electric energy meter state;
(f) APF branch road
APF data: electric current total harmonic distortion before the compensation, offset current, compensation after-current total harmonic distortion, compensation after-current effective value, voltage, frequency, power factor;
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, electric energy meter state;
(g) reactive power compensation branch road
SVC: condenser capacity, terminal voltage before the switching state, switching, terminal voltage behind the switching, output current, frequency, power factor, whether automatically control;
Prop up circuit-switched data: branch switch state, voltage, electric current, frequency (optional), the current active power of branch road, reactive power, power factor, electric energy meter state;
(h) and the site branch road
Little grid side: little grid side voltage, electric current, phase angle, frequency, power factor, active power, reactive power;
External power grid side: big grid side voltage, electric current, phase angle, frequency, power factor, active power, reactive power;
Prop up circuit-switched data: the on off state that is incorporated into the power networks, guard mode, the current active power of branch road, reactive power, power factor, electric energy meter state;
(i) environmental monitoring branch road
Circuit-switched data: on-site real-time temperature, humidity, wind speed, wind direction, air pressure, solar radiation amount, sunshine time, photovoltaic module temperature, the state of rainfall and each measuring instrument whether.
(2) operation controlled function
The running status of little electrical network can be divided into and is incorporated into the power networks and leaves two steady operational status of network operation; And/from the net mode switch and the two kinds of transition states of mode switch that leave/are incorporated into the power networks; Also there are two kinds of abnormal operating conditions in little electrical network simultaneously: little electric network fault or inspection travel state, the direct power supply state of the big electrical network of little network load.Operation control comprise little electrical network be incorporated into the power networks operation control, from network operation operation control, and/from the net mode switch and the mode switch that leave/is incorporated into the power networks.
When little electrical network was incorporated into the power networks, the operation control strategy was divided into basic controlling strategy and compound control strategy.The basic controlling strategy comprises active power control, Reactive Power Control, power quality controlling; Compound control strategy can be the combination of basic controlling strategy, also can be to certain operation optimization aim of system.
Little electrical network owing to there is not external electrical network to provide voltage/frequency to support, so need internal unit to coordinate each other, moves according to the voltage/frequency parameter of appointment when network operation.Therefore little electrical network mainly is active power control from network operation control, secondly is Reactive Power Control and power quality controlling.
When little electrical network is incorporated into the power networks; The various service datas of sending in the EMS real-time analysis; External electrical network breaks down or when receiving switching command, EMS is made judgement to current system operation situation when detecting, and has selected seaming and cutting to change mode or seamless switching mode according to little electrical network from the network operation mode; According to certain sequential control relevant device accomplish little electrical network also/from the network operation mode switch, control little electrical network and get into stable from the network operation state.
When little electrical network left network operation, EMS detected external electrical network ruuning situation in real time, in case external electrical network restores electricity; Little electrical network starts the flow process that is incorporated into the power networks; Start the mode switching program that leave/is incorporated into the power networks after receiving the answer of permission, according to selection is set seaming and cutting die change formula or seamless switching pattern are arranged, by each equipment of mode switching program switching of drafting; Conversion main power source operational mode realizes that little electrical network is incorporated into the power networks smoothly again.
(3) optimal control function
Little network optimization control technology; Take into full account regenerative resource randomness, little operation of power networks stability, energy storage charging and discharging capabilities; Model is set up in combination according to the distributed energy resource system in little electrical network, selects the appropriate control amount, carries out the coordinated management of polynary energy; Dsm is combined with energy management, select suitable controlled amounts to control.Simultaneously, under the condition of being incorporated into the power networks, little electrical network is accepted the power distribution network scheduling and according to actual conditions little operation of power networks is adjusted.
Optimal control function in the microgrid energy management system; After little operation of power networks state is made assessment; According to the real-time condition and extraneous order of little electrical network, confirm a little network optimization operational objective, according to optimization aim Optimum Operating Method is proposed; Provide the operation control strategy according to Optimum Operating Method, and will move control strategy and be handed down to corresponding controller on the spot and carry out.
(4) advanced analysis function
Microgrid energy management system advanced analysis function comprises equipment operation diagnosis, data statistic analysis, system's postitallation evaluation, meteorological resource analysis, investment return analysis etc., can increase other module according to actual conditions.
Microgrid energy management system scheme
The microgrid energy management system is accepted dispatching of power netwoks/control command, forms the integrated operation control command through computation optimization, is handed down to each controller on the spot of little electrical network; Simultaneously the micro-grid system operation information that send on the controller on the spot of collection analysis is assessed current little operation of power networks state, on send the result to dispatching of power netwoks/supervisory control system.
Fig. 2 is little grid monitoring system hardware structure diagram; Mainly forms by the visible microgrid energy management system of figure by computer system, generally comprise acquisition server, data server, SCADA server, monitor workstation, maintenance work station, analytical work station, WEB server, terminal server and relevant uninterrupted power supply, the network switch, the network printer, GPS to the time equipment composition.General operation Unix/Linux hybrid operating system or (SuSE) Linux OS adopt the commercial data base system.Key equipment adopts redundant configuration like data server, monitor workstation, front server, and server and work station can be matched according to the actual requirements or function is integrated.The general pair web frames that adopt of the management network segment, the small micro electrical network can be selected single web frame for use, and number is adopted the network segment and both can have been adopted two web frames also can adopt single web frame.
Data acquisition server is claimed front end processor again, is mainly used in data acquisition and preliminary treatment, and the communication true form is kept watch on and transmitted, and with other control unit swap datas, and issues control command to distant place intelligent terminal, accomplishes the distant place control of control unit on the spot.Local serial communication type data such as () RS485/232 controller data is on the spot sent into front end processor after terminal server is transformed to Ethernet data, local ethernet type controller data is on the spot directly sent into front end processor.In addition, leave EMS distance little electric network information far away after the terrain harvester gathers, deliver to front end processor on the unified process wireless communication, this EMS can be managed a plurality of micro-grid systems simultaneously like this.
Data server is the core of whole EMS operation, and the operator uses the wide area information server management system, store data structure, data definition and description, history alarm data, real-time data base sampled data, warning information etc.
The SCADA server provides the Real-time Data Service of whole system, accomplishes the real-time monitoring and control of electrical networks such as remote signalling, the processing of remote measurement amount, out-of-limit judgement, calculating, control.
Monitor workstation provides friendly, abundant human-computer interaction interface and monitoring means for the operations staff of Surveillance center, as shows various pictures (comprising system diagram, winding diagram, curve chart, geographical map, excellent figure, pie chart and meter diagram etc.), form, warning information and management information.The operations staff can retrieve various historical datas, carries out remote control, remote regulating operation and inquire about various parameters.
Operating analysis software in analytical work station can be accomplished the equipment operation diagnosis, data statistic analysis, system's postitallation evaluation, meteorological resource analysis, ADVANCED APPLICATIONS functions such as investment return analysis.
The maintenance work station supplies the attendant to carry out system maintenance usefulness; Generation and maintenance, systemic-function and the authority of carrying out drafting and modification, the form of the maintenance of various databases, various figures safeguarded, the scanning typing of data and management etc., can carry out remote dial through modem and safeguard.
The form work station is mainly accomplished the correlation function of form, mainly comprises: create new report form template, delete report form template, browse form, function such as printer setup, printing reports and timed print.
Can information such as browsing figure, form, historical data, various alarm operation records be provided to the MIS net through the WEB server.The WEB server is not directly connected in the real time execution system, but is connected with the real time data net through the special-purpose physical isolation apparatus of electric power system, sends data to WEB in real time by data center's client of real-time net, and database establishes mirror image on WEB.When needs were browsed picture, form, curve, the WEB server was sent out request through application program to this machine data storehouse, realized the WEB function of browse.Through positive physical isolation device, guaranteed the fail safe of real time execution system, the data that on the WEB function of browse, also guaranteed simultaneously to browse and the consistency of real-time running data.
EMS through vertically conscientiously device isolate after the data private network is transmitted in scheduling, with local dispatching of power netwoks division communication, on send operation information and accept the scheduling controlling instruction.
The software configuration of microgrid energy management system mainly comprises five levels, and is as shown in Figure 3:
(1) system platform level:
EMS can move on processors such as ALPHA, Power_PC, Sparc, Itanium, Intel, supports several operation systems or hybrid operating systems such as Linux/Unix, supports multiple business database running softwares such as Oracle.
(2) support platform level
Support platform comprises network subsystem, subsystem real time database, commercial data base subsystem, graphics subsystem, Report Subsystem, authority subsystem, computing subsystem.On real-time support platform,
Subsystem real time database content according to commercial data base when system start-up produces, and reacts the state of current electrical network, deposits real-time and requires to compare higher data; Commercial data base is used for store data structure, data definition and description, historical data, real-time data base sampled data and other management information etc.The graphics subsystem device provides multiple means to carry out picture layout, the placement of self-defined figure element, move, being connected of copy, rotation, distortion, variable color and definition and database, thereby generate required various pictures; Report Subsystem accomplish to be created new report form template, deletes report form template, is browsed form, the setting of printer, print a form, print a series of functions such as all forms and timed print; The authority subsystem can carry out safe and reliable, well-defined right assignment etc. for the user of application system according to term of reference, job specification, action and zone of responsibility division etc.
(3) base application function:
The base application function here mainly refers to the SCADA function, active power control and Reactive Power Control.The SCADA function comprises the monitoring function of distributed power source, energy storage, load, idle, APF and each branch road of site.The little operation of power networks information of SCADA real-time collecting; Handle the information of coming on the storage of collected, can supply the user real time inquiry, can simply control equipment in the system.
(4) coordinated control function:
Coordinated control function can be divided into the meritorious control of coordinating, idle coordination control.Operation control is claimed in meritorious coordination control again, is meant through adjusting the switching of exerting oneself and loading of distributed power source in little electrical network in an orderly manner, satisfies the controlled target of systemic presupposition, keeps little power grid operation.Meritorious coordination control can be divided into being incorporated into the power networks meritorious operation control, leaves the meritorious control of network operation, and/control from the net mode switch, switching controls leave/is incorporated into the power networks.Idle coordination control is when little power grid operation, for satisfying the requirement of user's quality of power supply, controls little electric network reactive compensation equipment, active power filtering equipment, and energy storage device is adjusted idle distribution in little electrical network, improves little electrical network quality of power supply, to satisfy customer requirements.
(5) ADVANCED APPLICATIONS function:
The ADVANCED APPLICATIONS function comprises scene exert oneself prediction, load prediction, control strategy optimization, energy management optimization, advanced analysis etc.The scene prediction of exerting oneself is meant the generating rule of summing up before photovoltaic, the wind-powered electricity generation, according to the on-site environment real time data of project, infers the situation of exerting oneself of next time period wind-powered electricity generation, photovoltaic.Load prediction is meant in the little electrical network of statistics uses electrographic recording, sums up user's electricity consumption rule, extrapolates next load in some time curve.Energy management optimization is meant that with one or several operating index of little electrical network be optimization objects; Assess current little operation of power networks state, adopt certain optimization method, propose the corresponding strategy that improves; Transfer to lower floor's equipment and carry out, reach the purpose of improving the optimization objects operating index.Control strategy optimization is meant under same controlled target; When EMS has the situation of various control scheme, according to the principle of distributed power source maximum using, under the prerequisite that guarantees the healthy operation of each equipment; The selection environmental benefit is high, the scheme that operating cost is low.
Claims (1)
1. microgrid energy management system, comprising: microgrid energy management system, micro electric network coordination controller, little electrical network be controller on the spot; Said little electrical network controller on the spot is made up of to the monitoring and protection equipment and the distributed power source controller of load and circuit all; Specifically comprise load governor, distributed power generation cell controller, energy storage controller; When little electrical network leaves network operation, little electrical network controller on the spot also will comprise the main power source controller; Load governor is used to accept and carry out the instruction that the micro electric network coordination controller is assigned, and drops into the excision load, and load governor supplies its reference with delivering to tuning controller on the load operation information real-time; The distributed power generation cell controller mainly refers to photovoltaic DC-to-AC converter control system, wind electric converter control system, diesel engine control system, miniature gas turbine current transformer.
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