CN109755938A - Active distribution network and its control method - Google Patents
Active distribution network and its control method Download PDFInfo
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- CN109755938A CN109755938A CN201910064241.5A CN201910064241A CN109755938A CN 109755938 A CN109755938 A CN 109755938A CN 201910064241 A CN201910064241 A CN 201910064241A CN 109755938 A CN109755938 A CN 109755938A
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Abstract
This disclosure relates to a kind of active distribution network and its control method.The active distribution network includes: multiple microgrids, each microgrid includes that power generator, heating combined equipment, refrigerating plant, distributed electric storage device, distributed heat-storing device and distributed accumulator are set, for multiple first Energy Load supply energy sources to connect one to one；Control system is connect with the multiple microgrid, the conversion and transmission of the energy in each device for controlling the multiple microgrid.Compared with the control model in traditional active distribution network based on electric power, the active distribution network provided multiple forms of energy to complement each other that the disclosure provides, the regulating power and range for improving active distribution network, using electricity, the Demand Side Response of hot and cold collaboration, enhancing Demand-side participates in the order of distribution scheduling.
Description
Technical field
This disclosure relates to energy internet area, and in particular, to a kind of active distribution network and its control method.
Background technique
In recent years, becoming increasingly conspicuous with energy shortage and environmental problem, new energy power generation technology is in the big of national policy
Power has obtained swift and violent development under supporting, a large amount of generation of electricity by new energy device power supply (Distributed in a distributed manner
Generation, DG) form be linked into power grid, while alleviating power grid pressure also to power grid bring power quality and
The challenge of planning, operation, control etc..
Traditional power grid is after accessing a large amount of DG, so that power grid is no longer the energy one-way transmission of only electric load
Power distribution network, but power supply and electric load and deposit, energy is two-way or even the power grid of multidirectional flowing.Scheduling, the control of traditional power grid
It needs to update with management method and just adapts to this new situations.
Active distribution network (Active Distribution Networks, AND) is the advanced stage skill of intelligent distribution network
Art form, basic definition and constitutes and has obtained being widely recognized as international academic community and industry at present.
The popularization and application of active distribution network can greatly promote power grid to the compatibility of green energy resource and to existing assets
The high efficiency utilized is the development trend of the following intelligent distribution network.Active distribution network is in the theoretical research Fang Xingwei with technical aspect
Chinese mugwort, there are still some critical issues urgently to be resolved to need research and inquirement.
Summary of the invention
Purpose of this disclosure is to provide a kind of efficient, energy-efficient active distribution network and its control methods.
To achieve the goals above, the disclosure provides a kind of active distribution network.The active distribution network includes: multiple micro-
Net, each microgrid include power generator, heating combined equipment, refrigerating plant, distributed electric storage device, distributed heat-storing device and distribution
Formula accumulator is set, for multiple first Energy Load supply energy sources to connect one to one；Control system, and it is the multiple micro-
Net connects, the conversion and transmission of the energy in each device for controlling the multiple microgrid.
Optionally, be connected with each other between any two microgrid, the control system includes: interconnect device, respectively with it is each
Microgrid connection, for controlling the circulation for carrying out the energy between each microgrid.
Optionally, the control system includes: the multiple grid-connecting apparatus to connect one to one with the multiple microgrid, each
Microgrid connect with corresponding second Energy Load by corresponding grid-connecting apparatus, and each microgrid pass through corresponding grid-connecting apparatus and
External electrical network connection, each grid-connecting apparatus are used to corresponding microgrid and corresponding second Energy Load being switched in or out external electrical
Net.
Optionally, each grid-connecting apparatus is also used to corresponding second Energy Load being switched in or out corresponding microgrid.
Optionally, the active distribution network further include: centralized energy storage device, including concentrate electric storage device, concentrate heat accumulation dress
It sets and accumulator is concentrated to set, connect with the multiple microgrid, for being multiple first Energy Loads and multiple second Energy Loads
Supply energy source.
The disclosure also provides a kind of control method of active distribution network.The described method includes: it is negative to obtain multiple first energy
The energy-output ratio of lotus；Energy in each device of multiple microgrids is controlled according to the energy-output ratio of the multiple first Energy Load
The conversion and transmission in source, wherein each microgrid includes power generator, heating combined equipment, refrigerating plant, distributed electric storage device, divides
Cloth heat-storing device and distributed accumulator are set, multiple first Energy Loads that the multiple microgrid is used for connect one to one
Supply energy source.
Optionally, the energy-output ratio according to the multiple first Energy Load controls each device of multiple microgrids
The step of conversion and transmission of the middle energy includes: when the output of the power generator is greater than the electric power of corresponding first Energy Load
When consumption, controls corresponding distributed electric storage device and store remaining capacity；When the output of the power generator is greater than corresponding the
The power consumption of one Energy Load, and when the electricity of corresponding distributed electric storage device storage reaches predetermined amount, control the system
Heat energy needed for the remaining capacity of output is converted first Energy Load by thermal, alternatively, the control refrigeration dress
Set the required cold energy source for converting the remaining capacity of output to first Energy Load；When the output of the power generator is big
Reach predetermined amount, and institute in the electricity of the power consumption of corresponding first Energy Load, corresponding distribution electric storage device storage
Heat energy needed for stating the first Energy Load and cold energy source are by the heating combined equipment and the refrigerating plant for seasonable, control institute
Distributed heat-storing device is stated to store the heat energy that remaining capacity converts, alternatively, the control distributed accumulator set by
The cold energy source of remaining capacity conversion is stored.
Optionally, the energy-output ratio according to the multiple first Energy Load controls each device of multiple microgrids
The step of conversion and transmission of the middle energy includes: to control the heating combined equipment and institute when external power grid, which indicates, reduces power load
It states refrigerating plant and reduces operation power；When external power grid indicates to reduce power load, and the heating combined equipment and the refrigerating plant
When out of service, control increases the output that the distributed heat-storing device and distributed accumulator are set；When external power grid indicates to reduce
Power load, the heating combined equipment and the refrigerating plant are out of service, and the distributed heat-storing device and the distribution
Accumulator set in energy when exporting completely, control power generator increase operation power.
Optionally, each microgrid is connected by corresponding grid-connecting apparatus with corresponding second Energy Load, described according to institute
State the step of energy-output ratios of multiple first Energy Loads controls the conversion and transmission of the energy in each device of multiple microgrids
Further include: when external power grid indicates to reduce power load, the heating combined equipment and the refrigerating plant are out of service, the distribution
Heat-storing device and the distributed accumulator set in the energy export completely, and the operation power of the power generator reaches pre-
When determining power, energy supply of the control cutting to second Energy Load.
Optionally, the active distribution network further includes centralized energy storage device, described according to the multiple first Energy Load
Energy-output ratio the step of controlling the conversion and transmission of the energy in each device of multiple microgrids include: the control distribution
Electric storage device, the distributed heat-storing device and the distributed accumulator are set and are run with predetermined power；According to first energy
The energy-output ratio of source load controls the operating status of the centralized energy storage device.
Through the above technical solutions, provide a kind of active distribution network provided multiple forms of energy to complement each other, in traditional active distribution network with
Control model based on electric power is compared, and the regulating power and range of active distribution network are improved, and utilizes electricity, the need of hot and cold collaboration
Side is asked to respond, enhancing Demand-side participates in the order of distribution scheduling.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is the structural block diagram for the active distribution network that an exemplary embodiment provides；
Fig. 2 is the structural schematic diagram for the active distribution network that an exemplary embodiment provides；
Fig. 3 is the flow chart of the control method for the active distribution network that an exemplary embodiment provides；
Fig. 4 is the structural schematic diagram for the active distribution network that another exemplary embodiment provides.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
Fig. 1 is the structural block diagram for the active distribution network that an exemplary embodiment provides.As shown in Figure 1, the active distribution
Net may include multiple microgrids and control system.
Wherein, each microgrid includes power generator, heating combined equipment, refrigerating plant, distributed electric storage device, distributed heat accumulation
Device and distributed accumulator are set, for multiple first Energy Load supply energy sources to connect one to one.Control system with
Multiple microgrids connect, the conversion and transmission of the energy in each device for controlling multiple microgrids.
Include cold source, heat source, power supply in microgrid, connect with refrigeration duty, thermic load, electric load, and there is distributed storage
The multiple functions such as heat, the distributed cold and distributed storage of storage, have the function of demand side management and control.
Control system can be realized between active distribution network and external power grid, between microgrid and microgrid, production capacity inside microgrid, use
The scheduling of energy intelligent control and trouble handling function between energy and energy storage.
As previously shown, traditional active distribution network is based on electric power, and compared with traditional active distribution network, the tradition of the disclosure is main
Dynamic power distribution network is additionally arranged heating combined equipment, refrigerating plant, distributed heat-storing device and distributed accumulator and sets.Therefore, it can be realized
It provides multiple forms of energy to complement each other, the intelligentized control method that hot and cold, power supply multipotency is coordinated.With the control mould in traditional active distribution network based on electric power
Formula is compared, and the regulating power and range of active distribution network are improved, and using electricity, the Demand Side Response of hot and cold collaboration, enhances demand
The order of side participation distribution scheduling.
Fig. 2 is the structural schematic diagram for the active distribution network that an exemplary embodiment provides.As shown in Fig. 2, any two are micro-
It can be connected with each other between net.The control system may include interconnect device.Interconnect device is connect with each microgrid respectively, is used
In the circulation for controlling the progress energy between each microgrid.
Interconnect device has metering, protection, control and synchronization function, realizes that the interconnection of the energy and information between each microgrid is mutual
It is logical.
Interconnected complementary mode using multiple microgrids, can be improved power supply, heat source during grid-connected and off-grid operation
Dispatching, improve the stability and reliability of power distribution network.During grid-connected, to reduce grid entry point, it can use multiple
It is grid-connected that microgrid collects route single-point, can reduce bulk power grid range of management in this way.In planned off-network or unplanned property off-network shape
Under condition, arrange that interconnect device, interconnect device have the function of metering, protection, measurement, the same period and switch etc. at each microgrid interconnection,
Realize the transfer of flexible topological structure and distributed power generation and load, multiple microgrids, centralized energy storage can under off-network state
To be arbitrarily mutually unified into a bigger microgrid, the more stable micro- electricity supported by multiple distributed generation resources, heat source is formed
Net.
In the embodiment of fig. 2, the control system can also include connect one to one with multiple microgrids it is multiple simultaneously
Net device.Each microgrid is connected by corresponding grid-connecting apparatus with corresponding second Energy Load, and each microgrid passes through correspondence
Grid-connecting apparatus connect with external electrical network, each grid-connecting apparatus is used to access corresponding microgrid and corresponding second Energy Load
Or disconnect external electrical network.
Grid-connecting apparatus be with metering, protection, control, PCC (Point of Common Coupling, it is commonly connected
Point), the same period and ATS (Automatic transfer switching equipment, automatic transfer switching electric appliance) function in
Integrated control unit, realizes single microgrid and active distribution network is grid-connected or off-grid operation.Each micro-grid connection point of system and
Collect settable grid-connecting apparatus at route grid entry point, grid-connecting apparatus has metering, protection, control, PCC and interlock switch etc.
Function, can according to different type microgrid with can demand carries out the transfer of power flowcontrol and distributed power generation and load and equal
Weighing apparatus.The normal operation of other microgrids is not influenced after single or multiple microgrids are out of service.
Optionally, each grid-connecting apparatus is also used to corresponding second Energy Load being switched in or out corresponding microgrid.Its
In, the second Energy Load can be set to the load more secondary than the first Energy Load, can be by grid-connected when net internal loading is excessive
Corresponding second Energy Load is disconnected corresponding microgrid by device, is stopped to its supply energy source.In such manner, it is possible to ensure first energy
The normal operation of load and the safety of entire power grid.
Load rating is controlled by grid-connecting apparatus, by important load (the first Energy Load) configuration in each microgrid
Portion, secondary load (the second Energy Load) configuration is outside each microgrid.The confession of secondary load can be switched by grid-connecting apparatus
Electric mode, that is, can choose and powered by microgrid, or powered by external power grid.In microgrid off-network, when microgrid internal power predict,
When voltage, frequency meet stable operation requirement, the second secondary Energy Load can be accessed microgrid by grid-connecting apparatus, by microgrid
Portion's loop power supply.It is such as unsatisfactory for stable operation requirement, the power supply that secondary load guarantees important load can be cut off.
Optionally, in the embodiment of fig. 2, active distribution network can also include centralized energy storage device.
Centralized energy storage device may include concentrating electric storage device, concentrating heat-storing device and accumulator is concentrated to set, and multiple micro-
Net connection, for being multiple first Energy Loads and multiple second Energy Load supply energy sources.
As described above, being distributed energy storage device (including the distributed electric storage device, distribution of formula in each microgrid
Heat-storing device and distributed accumulator are set), on this basis, add centralized energy storage device.By the way that control strategy, Ke Yishi is arranged
Charge and discharge mode is selected for principle so that economy is more excellent under present active distribution network grid connection state, in active distribution network isolated network state
Under, in case capacity model is run, realize power-balance in netting.
In addition, can also include Power Exchange point protection device in active distribution network in another embodiment.Power Exchange
Point protection device has common current voltage protection function and power selection, frequency, the function of harmonic protection.
The disclosure additionally provides a kind of control method of active distribution network.Fig. 3 is the active that an exemplary embodiment provides
The flow chart of the control method of power distribution network.As shown in figure 3, the described method comprises the following steps.
In step s 11, the energy-output ratio of multiple first Energy Loads is obtained.
In step s 12, it is controlled in each device of multiple microgrids according to the energy-output ratio of multiple first Energy Loads
The conversion and transmission of the energy, wherein each microgrid include power generator, heating combined equipment, refrigerating plant, distributed electric storage device,
Distributed heat-storing device and distributed accumulator are set, and multiple microgrids are used to supply for multiple first Energy Loads to connect one to one
It should be able to source.
Through the above technical solutions, a kind of control method of active distribution network provided multiple forms of energy to complement each other is provided, with traditional active
Control model in power distribution network based on electric power is compared, and the regulating power and range of active distribution network are improved, using it is electric, cold,
The Demand Side Response of heat collaboration, enhancing Demand-side participate in the order of distribution scheduling.
In one embodiment, it on the basis of Fig. 3, is controlled according to the energy-output ratio of multiple first Energy Loads multiple micro-
(step S12) may comprise steps of the step of the conversion and transmission of the energy in each device of net.
When the output of power generator is greater than the power consumption of corresponding first Energy Load, corresponding distributed storage is controlled
Electric installation stores remaining capacity；
When the output of power generator is greater than the power consumption of corresponding first Energy Load, and corresponding distributed storage dress
When setting the electricity of storage and reaching predetermined amount, the heating combined equipment is controlled by the remaining capacity of output and is converted into the first Energy Load institute
The heat energy needed converts the required cold of the first Energy Load for the remaining capacity of output alternatively, controlling the refrigerating plant
The energy；
When the output of power generator is greater than the power consumption of corresponding first Energy Load, corresponding distribution electric storage device
The electricity of storage reaches predetermined amount, and heat energy needed for first Energy Load and cold energy source are by heating combined equipment and refrigeration
It when device provisioning, controls distributed heat-storing device and stores the heat energy that remaining capacity converts, alternatively, the distributed storage of control
Device for cooling stores the cold energy source that remaining capacity converts.
In the embodiment, active distribution network operation when, can with real-time tracking and response distributed generation resource generated output,
Hot and cold, power supply multipotency coordinates intelligentized control method.When the generated output of distributed generation resource is greater than the power load of the first Energy Load
When, the state-of-charge of distributed electric storage device is detected first, judges whether distributed electric storage device can also charge.Work as distribution
There are also charge when charging capacity for electric storage device.When remaining capacity is close to scheduled critical value, stop charging, increases heat pump
The extra electric energy of distributed electric storage device is converted the cold or hot hot-cool demand for meeting load by power output.
Secondly, can continue growing heat pump power output will if the generated output of power generator is still greater than power load
The cold or thermmal storage that heat pump (for example, air source heat pump, hydro-thermal pump, earth source heat pump etc.) generates is to cold-storage and thermal storage device.
Again, it if generated output is still greater than power load, can be determined for target to power grid so that economy is more excellent
Anti- power transmission still reduces generated output, wherein should allow power generator work in rated power as far as possible, be conducive to extend in this way
The service life of power generator ensures Electrical Safety.
When generated output is less than power load, it can control distributed electric storage device first and be converted to by charge mode and put
Power mode, secondly reduces heat pump power output, and confession is set by distributed heat-storing device and distributed accumulator in insufficient cooling and heating load part
It answers；Finally with the more excellent generated output for determining whether increase power generator for target of economy.
In another embodiment, it on the basis of Fig. 3, is controlled according to the energy-output ratio of multiple first Energy Loads multiple
(step S12) may comprise steps of the step of the conversion and transmission of the energy in each device of microgrid.
When external power grid, which indicates, reduces power load, controls heating combined equipment and refrigerating plant reduces operation power；
When external power grid instruction reduction power load, and when heating combined equipment and refrigerating plant out of service, control increases distribution
The output that formula heat-storing device and distributed accumulator are set；
When external power grid indicates to reduce power load, heating combined equipment and refrigerating plant are out of service, and distributed heat-storing device
With distributed accumulator set in the energy completely export when, control power generator increase operation power.
The factors such as randomness, the intermittence of each microgrid distributed power generation are considered, to coordinate the cold of cold source and heat output
The Demand Side Response of thermoelectricity collaboration.Active distribution network usually contains three kinds of typical Cooling and Heat Sources, the first is utilized more than generator
The lithium bromide chiller of heat, second is heat pump unit, the third is the cold heat-storing device of storage.When external power grid is proposed to active distribution network
Demand Side Response, it is desirable that when reducing power load, heat pump and the power output with colod-application thermic load can be reduced first, secondly increase storage
The power output of cold heat-storing device cold and heat supply increases generator output again, and then increases the power output of generator waste heat cold and heat supply.
When each microgrid is connected by corresponding grid-connecting apparatus with corresponding second Energy Load, in a upper embodiment
On the basis of, the conversion and biography of the energy in each device of multiple microgrids are controlled according to the energy-output ratio of multiple first Energy Loads
Defeated step (step S12) can also include: when external power grid indicates to reduce power load, and heating combined equipment and refrigerating plant stop fortune
Row, distributed heat-storing device and distributed accumulator set in the energy export completely, and the operation power of power generator reaches
When predetermined power, energy supply of the control cutting to the second Energy Load.It is, in a upper embodiment, if do not reached yet
The energy supply that can then cut off the second secondary Energy Load is required, to Demand Side Response to ensure the normal fortune of important load
Capable and power grid safety.
When active distribution network further includes centralized energy storage device, in another embodiment, according to multiple first Energy Loads
Energy-output ratio the step of controlling the conversion and transmission of the energy in each device of multiple microgrids (step S12) can also include
Following steps.
Distributed electric storage device, distributed heat-storing device and distributed accumulator is controlled to set and run with predetermined power；According to
The operating status of energy storage device in the energy-output ratio domination set of first Energy Load.
Under grid connection state, centralized energy storage device for example can (active distribution network be connect with external power grid with collection bus
Bus) connection, active distribution network progress peak load shifting is aided with and adjusts having in active distribution network with energy type mode operation
Function is idle, voltage and frequency etc.；(distributed electric storage device, distributed heat-storing device and distributed storage are cold for distributed energy storage device
Device) with power-type mode operation, it is mainly responsible for the voltage and frequency for stablizing each microgrid during grid-connected and off-network.In off-network
Under state, centralized energy storage device can for example be switched to low voltage liaison net bus (buses of multiple microgrid connections) by collection bus,
It is connect by interconnect device with each microgrid.In the embodiment, by centralized energy storage and distributed energy storage complementary operation, master is improved
The regulating power of dynamic power distribution network.
To sum up, which can be realized: 1) providing multiple forms of energy to complement each other, hot and cold, power supply multipotency coordinates intelligentized control method；2)
The Demand Side Response of cool and thermal power collaboration；3) the centralized and distributed layering energy storage combined, distributed electrical pyrolysis coupling and exchange
Energy storage；4) more microgrid paired runnings and Collaborative Control.
Specifically, the active distribution network of the disclosure has at four aspects and improves and promoted.Firstly, by providing multiple forms of energy to complement each other,
Hot and cold, power supply multipotency coordinates intelligentized control method, improve the economy of active distribution network operation, reduce to external power grid according to
Rely, improves the permeability of distributed energy, renewable energy to large extent, reduce the row of pollutant and carbon dioxide
It puts；Secondly, improving the ability of active distribution network Demand Side Response by the Demand Side Response that cool and thermal power cooperates with, expanding is needed
The range for asking side to respond, improves bulk power grid to the dispatching of active distribution network；Again, it using layering energy storage, realizes and concentrates
The complementary operation of energy storage and distributed energy storage realizes energy scheduling and power-balance, benefit in different spatially and temporally dimensions
Electric heating decoupling control and electric heating economical operation control etc. are realized with distributed heat accumulation, improve the Demand Side Response energy of electrothermal load
Power；Finally, realizing active distribution network after off-network by more microgrid paired runnings and Collaborative Control, can appoint between more microgrids
The combined paired running mode of meaning, further improves the reliability and flexibility of active distribution network off-grid operation.By above
The active distribution network of scheme constructs provides reproducible, propagable for the planning of active distribution network, design, construction and operation
Development model.
Fig. 4 is the structural schematic diagram for the active distribution network that another exemplary embodiment provides.The active distribution of providing multiple forms of energy to complement each other
Net includes a plurality of types of microgrids, grid-connecting apparatus, interconnect device, protective device, energy storage device and corresponding control system, respectively
Microgrid can interconnect.Three kinds of typical microgrids are shown in the embodiment of Fig. 4, are that (No. 1 micro- for cold, heat and electricity triple supply microgrid respectively
Net), alternating current-direct current mixing microgrid (No. 2 microgrids), light storage microgrid (No. 3 microgrids).
Active distribution network AC10kV or 35kV collects high-pressure side various types microgrid, and forms height in energy supply regional scope
Pressure collects I sections of buses, and I sections of buses are connect by grid entry point (Power Exchange point) QF1 with the external power grid in electric system, forms area
The single grid entry point in domain.QF1 division state determines the off-network of active distribution network total system and be incorporated into the power networks model selection and switching.
Energy storage device ID32 in active distribution network internal system config set is connect after being boosted by T4 with I sections of buses.?
QF1 "on" position, then QF5 is in "on" position, and QF26 is in gate-dividing state, and centralized energy storage works under P/Q mode, and ID32 can
Participate in the economic load dispatchings such as bulk power grid spare capacity and peak load shifting.If QF1 gate-dividing state, QF5 is in gate-dividing state, at QF26
It is connect in "on" position with IX bus (inter-bay), ID32 adjusts microgrid voltages all types of in active distribution network, frequency
Control, and ensure the normal operation of all types of microgrid loads.
No. 1 microgrid is connect by T1 with I sections of buses, and QF2 is T1 low-pressure side on-load switch.II sections of buses pass through inside microgrid
PCC1 switch is connect with after QF2 boost switching with I sections of buses, and II bus is respectively spaced circuit are as follows: it is cold and hot that the circuit QF7 is distributed formula
Electric combined supply system, combustion gas/fuel electric generator ID8 power by grid-connection cabinet ID1 to other loads, and the waste heat that ID8 is generated enters
Lithium bromide chiller ID12 is converted to hot and cold water, is delivered to building ID13 through cold and hot pipe network and meets cooling and heating load demand.Cold-storage stores
Thermal ID11 is connected with cold and hot pipe network, can store to cold and hot, and cold and hot pipe network is to ID13 for cold and hot.The circuit QF8, which has, to be divided
Cloth electricity generation system (such as distributed photovoltaic, wind-power electricity generation) ID9, ID9 provide electric energy after ID2 inversion for load.QF9 is returned
Road has energy storage battery system, and energy-storage battery ID10 adjusts distributed generation resource in the circuit QF8 by ID3 rectification and inversion and smoothly connects
Enter.The circuit QF10 has heat pump (air source heat pump, water resource heat pump, earth source heat pump) system, and the hot and cold water that heat pump ID4 is generated passes through
Cold and hot pipe network provides cold and hot for ID13.The circuit QF11 connects important load, the mutual regulating guarantee in the circuit microgrid QF7, QF8 and QF9
The normal power supply of ID5.The circuit QF6 connects IX bus, and under QF1 separating brake situation, QF5 separating brake, QF26 closes a floodgate, the electrification of IX bus,
It is selected by ID35 control system control selections and interconnect device ID33 logic judgment so that QF6 closes a floodgate, to adjust II sections of bus electricity
Pressure, frequency etc..Main 1 switch and standby 1 switch carry out logical time delay interlocking, are III sections of bus incoming switches.The circuit QF12 and QF13
For the other load power supplies of ID6 and ID7.It closes a floodgate in QF1, QF2, main 1 circuit closed, standby 1 circuit disconnects, III sections of bus electrifications.When
Gate-dividing state at QF1, QF2, main 1 circuit disconnect, and standby 1 loop state is according to No. 1 microgrid status and current active distribution network system
ID35 control system runs energy spectrometer, and selectivity is closed.
No. 2 microgrids are connect by T2 with I sections of buses, and QF3 is T2 low-pressure side on-load switch.IV sections of buses pass through inside microgrid
PCC2 switch is connect with after QF3 boost switching with I sections of buses, and IV sections of buses are respectively spaced circuit are as follows: the circuit QF14 is direct current system
System, ID14 are the commutation inversion device with stabilizing control system, and VI sections of busbar voltage ranges are DC500V-750V, and ID23 divides
Cloth power generation accesses VI sections of buses after ID19 DC voltage-stabilizing.Energy-storage battery ID24 accesses the end VI after ID20 DC voltage-stabilizing
Bus is quickly adjusted for VI sections of bus function balances.ID21 direct-current charging post is connected to VI sections of buses, the connection of ID22 DC load
In VI sections of buses.Realize voltage and mutually isolated, the active and reactive independent control of frequency, higher energy transmission efficiency.QF15
Circuit is two-way exchange charging pile (V2G) ID15, participates in the scheduling of bulk power grid energy and power grid using electric car distributed energy storage
Power regulation.The circuit QF17 connects IX bus, and under QF1 separating brake situation, QF5 separating brake, QF26 closes a floodgate, the electrification of IX bus, by
ID35 control system control selections and interconnect device ID33 logic judgment select so that QF17 closes a floodgate, to adjust IV sections of bus electricity
Pressure, frequency etc..Main 2 switch and standby 2 switch carry out logical time delay interlocking, are V sections of bus incoming switches, the circuit QF18 and QF19 is
The other load power supplies of ID17 and ID18.It closes a floodgate in QF1, QF3, main 2 circuit closeds, standby 2 circuits disconnect, V sections of bus electrifications.When
Gate-dividing state at QF1, QF3, main 2 circuits disconnect, and standby 2 loop states are according to No. 2 microgrid statuses and current active distribution network system
ID35 control system runs energy spectrometer, and selectivity is closed.
No. 3 microgrids are connect by T3 with I sections of buses, and QF4 is T3 low-pressure side on-load switch.VII sections of buses inside micro-capacitance sensor
It is connect after QF4 boost switching with I sections of buses by PCC3 switch, VII sections of each interval circuit of bus are as follows: the circuit QF20 tool
It is distributed formula electricity generation system ID30, ID30 and powers after ID25 inversion for load.The circuit QF21 has energy storage battery system
ID31, ID31 adjust the circuit QF20 ID30 in VII bus by ID26 rectification and inversion and smoothly access.The connection of the circuit QF22 is important
Load guarantees the normal power supply of ID27.The circuit QF23 connects IX sections of buses, and under QF1 separating brake situation, QF5 separating brake, QF26 is closed
Lock, the electrification of IX bus, by ID35 control system control selections and the selection of interconnect device ID33 logic judgment so that QF123 closes a floodgate,
To adjust VII sections of busbar voltages, frequencies etc..Main 3 switch and standby 3 switch carry out logical time delay interlocking, are VIII sections of bus inlet wires
Switch.The circuit QF24 and QF25 is the other load power supplies of ID28 and ID29.It closes a floodgate in QF1, QF4, main 3 circuit closeds, standby 3 circuits
It disconnects, VIII sections of bus electrifications.The gate-dividing state at QF1, QF4, main 3 circuits disconnect, and standby 3 loop states are existing according to No. 3 microgrids
Shape and current 35 control system of active distribution network system identifier run energy spectrometer, and selectivity is closed.
No. 4 microgrids are connect by PCC4 with T5 with I sections of buses, inside by multiple power sources one or more combination, no
The other forms energy needed for only producing electric energy and produce load.Energy-storage system (mechanical energy storage, Power Flow, chemistry storage
Can) be used for smooth power output, peak load shifting, compensation load fluctuation, improve generation of electricity by new energy efficiency, improve power quality, is low
Voltage ride-through guarantees that system stability and tracking planned dispatching improve power generation precision of prediction, guarantees that heterogeneity and different brackets are negative
The just common energy of lotus.
In order to make full use of the complementarity of various distributed energies, renewable energy in time domain and airspace, improve actively
PCC1, PCC2, PCC3, PCC4 are reduced to QF1 using grid-connecting apparatus by distribution network system power supply reliability, stability, continuity
One grid entry point.More kinds of distributed energy complemental power-generations of ID8, ID9, ID23, ID30.Cooling and Heat Source ID4 and ID12 and ID11 cold-storage
Regenerative apparatus is ID13 cold and heat supply.Load rating guarantees the power reguirements of different load grade, and ID5, ID16, ID27 attach most importance to
Load is wanted, ID6, ID7, ID17, ID18, ID28, ID29 are insignificant property load.Each microgrid internal electric source, heat source and load
It is different, No. 1, No. 2, by interconnect device realize that energy interactions are complementary between No. 3 microgrids.
Under active distribution network isolated network state, No. 1 microgrid can be dispatched by QF6, QF17 by ID35 energy and ID33 logic
Judgement is interconnected with No. 2 microgrids, No. 1 microgrid can be dispatched by QF6, QF23 by ID35 energy and ID33 logic judgment and No. 3 it is micro-
Net interconnection.By the scheduling of ID35 energy and ID33 logic judgment, No. 1 microgrid can be with No. 2 and No. 3 by QF6, QF17, QF23
Microgrid interconnects simultaneously, and No. 2 microgrids can also be interconnected by QF17, QF23 and No. 3 microgrids.Centralized energy storage, can under QF5 separating brake situation
It is interconnected by QF6 and No. 1 microgrid, is interconnected by QF17 and No. 2 microgrid, interconnected by QF23 and No. 3 microgrid, by QF6, QF17
It interconnects, is interconnected by QF17, QF23 and No. 2 and No. 3, by QQF6, QF17, QF23 and No. 1,2 simultaneously with No. 1 and No. 2 microgrids
Number and No. 3 microgrids interconnect simultaneously.
The active distribution network has cold and hot energy storage and electric energy storage, and ID11 is cold-storage and thermal storage device, the cold and hot source of accumulation of energy
For ID12 and ID4, ID12 and ID14 can be concurrently or separately to ID11 cooling supply or heat supplies.Distributed storage ID10, ID24, ID31
Smoothly accessed for distributed generation resource ID9, ID23, ID30 in No. 1, No. 2, No. 3 microgrids and No. 1, No. 2, No. 3 microgrids and leave moment
Power support is provided.Centralized energy storage ID32 peak load shifting economical operation under QF1 and QF5 "on" position, QF26 gate-dividing state,
QF1 and QF5 gate-dividing state as backup power supply is that active distribution network provides power and supports under QF26 "on" position.
Active distribution network is under grid-connected situation, QF1, QF2, QF3, QF4, QF5, PCC1, PCC2, PCC3, PCC4, master 1, master
2, main 3, QF7, QF8, QF9, QF10, QF11, QF12, QF13, QF14, QF15, QF16, QF18, QF19, QF20, QF21,
QF22, QF24, QF25 in "on" position, standby 1, it is standby 2, standby 3, QF6, QF17, QF23, QF26, be gate-dividing state.
Active distribution network is under isolated network state, QF1, QF2, QF3, QF4, QF5, PCC1, PCC2, PCC3, PCC4, master 1, master
2,3 are led, in gate-dividing state, QF7, QF8, QF9, QF10, QF11, QF14, QF15, QF16, QF20, QF21, QF22, QF26 close a floodgate
State, QF6, QF17, QF23, QF12, QF13, QF18, QF19, QF24, QF25, standby 1, standby 2, standby 3 can pass through ID35 energy tune
Degree and ID33 logic judgment system capacity calculate selectivity and close a floodgate.
It is grid-connected to turn under isolated network state, QF1, QF2, QF3, QF4, QF5, PCC1, PCC2, PCC3, PCC4, it is main 1, main 2, main 3,
QF12, QF13, QF18, QF19, QF24, QF25 become separating brake from closing a floodgate, and QF26, become closing a floodgate from separating brake, QF6, QF17,
QF23, standby 1, standby 2, standby 3, QF12, QF13, QF18, QF19, QF24, QF25 can be dispatched by ID35 energy and ID33 logic is sentenced
It is disconnected that selectivity is needed to close a floodgate.
Isolated network turns under grid connection state, and QF6, QF17, QF23, standby 1, standby 2, standby 3 first become separating brake from combined floodgate, QF1, QF2,
QF3, QF4, QF5, PCC1, PCC2, PCC3, PCC4, main 1, main 2, main 3 are become by separating brake closes a floodgate.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (10)
1. a kind of active distribution network, which is characterized in that the active distribution network includes:
Multiple microgrids, each microgrid include power generator, heating combined equipment, refrigerating plant, distributed electric storage device, distributed heat accumulation
Device and distributed accumulator are set, for multiple first Energy Load supply energy sources to connect one to one；
Control system is connect with the multiple microgrid, in each device for controlling the multiple microgrid the conversion of the energy and
Transmission.
2. active distribution network according to claim 1, which is characterized in that it is connected with each other between any two microgrid, it is described
Control system includes:
Interconnect device is connect with each microgrid respectively, for controlling the circulation for carrying out the energy between each microgrid.
3. active distribution network according to claim 1, which is characterized in that the control system includes:
The multiple grid-connecting apparatus to connect one to one with the multiple microgrid, each microgrid by corresponding grid-connecting apparatus with it is corresponding
The connection of the second Energy Load, and each microgrid is connect by corresponding grid-connecting apparatus with external electrical network, each grid-connecting apparatus use
In corresponding microgrid and corresponding second Energy Load are switched in or out external electrical network.
4. active distribution network according to claim 3, which is characterized in that each grid-connecting apparatus is also used to corresponding second
Energy Load is switched in or out corresponding microgrid.
5. active distribution network according to claim 3, which is characterized in that the active distribution network further include:
Centralized energy storage device, including concentrate electric storage device, concentrate heat-storing device and accumulator is concentrated to set, connect with the multiple microgrid
It connects, for being multiple first Energy Loads and multiple second Energy Load supply energy sources.
6. a kind of control method of active distribution network, which is characterized in that the described method includes:
Obtain the energy-output ratio of multiple first Energy Loads；
According to the energy-output ratio of the multiple first Energy Load control in each device of multiple microgrids the conversion of the energy and
Transmission, wherein each microgrid includes power generator, heating combined equipment, refrigerating plant, distributed electric storage device, distributed heat accumulation dress
It sets and distributed accumulator is set, multiple first Energy Load supply energy sources that the multiple microgrid is used for connect one to one.
7. according to the method described in claim 6, it is characterized in that, the energy according to the multiple first Energy Load disappears
Consumption controls the step of conversion and transmission of the energy in each device of multiple microgrids and includes:
When the output of the power generator is greater than the power consumption of corresponding first Energy Load, corresponding distributed storage is controlled
Electric installation stores remaining capacity；
When the output of the power generator is greater than the power consumption of corresponding first Energy Load, and corresponding distributed storage dress
When setting the electricity of storage and reaching predetermined amount, controls the heating combined equipment and convert first energy for the remaining capacity of output and bear
Heat energy needed for lotus converts first Energy Load for the remaining capacity of output alternatively, controlling the refrigerating plant
Required cold energy source；
When the output of the power generator is greater than the power consumption of corresponding first Energy Load, corresponding distribution electric storage device
The electricity of storage reaches predetermined amount, and heat energy needed for first Energy Load and cold energy source by the heating combined equipment and
For the refrigerating plant for seasonable, the control distributed heat-storing device stores the heat energy that remaining capacity converts, alternatively,
It controls the distributed accumulator and sets and store the cold energy source of remaining capacity conversion.
8. according to the method described in claim 6, it is characterized in that, the energy according to the multiple first Energy Load disappears
Consumption controls the step of conversion and transmission of the energy in each device of multiple microgrids and includes:
When external power grid, which indicates, reduces power load, controls the heating combined equipment and the refrigerating plant reduces operation power；
When external power grid instruction reduction power load, and when the heating combined equipment and the refrigerating plant out of service, control increases
The output that the distribution heat-storing device and distributed accumulator are set；
When external power grid indicates to reduce power load, the heating combined equipment and the refrigerating plant are out of service, and the distribution
Heat-storing device and the distributed accumulator set in energy when exporting completely, control the power generator increase operation function
Rate.
9. according to the method described in claim 8, it is characterized in that, each microgrid passes through corresponding grid-connecting apparatus and corresponding the
The connection of two Energy Loads, the energy-output ratio according to the multiple first Energy Load control each device of multiple microgrids
The step of conversion and transmission of the middle energy further include:
When external power grid indicates to reduce power load, the heating combined equipment and the refrigerating plant are out of service, the distributed storage
Thermal and the distributed accumulator set in the energy export completely, and the operation power of the power generator reaches predetermined
When power, energy supply of the control cutting to second Energy Load.
10. according to the method described in claim 6, it is characterized in that, the active distribution network further includes centralized energy storage device, institute
State the conversion and biography that the energy in each device of multiple microgrids is controlled according to the energy-output ratio of the multiple first Energy Load
Defeated step includes:
The distributed electric storage device, the distributed heat-storing device and the distributed accumulator is controlled to set and transport with predetermined power
Row；
The operating status of the centralized energy storage device is controlled according to the energy-output ratio of first Energy Load.
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