CN106253345A - A kind of electric power networks and control method, device and system - Google Patents
A kind of electric power networks and control method, device and system Download PDFInfo
- Publication number
- CN106253345A CN106253345A CN201610817474.4A CN201610817474A CN106253345A CN 106253345 A CN106253345 A CN 106253345A CN 201610817474 A CN201610817474 A CN 201610817474A CN 106253345 A CN106253345 A CN 106253345A
- Authority
- CN
- China
- Prior art keywords
- power
- microgrid
- energy storage
- storage device
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004146 energy storage Methods 0.000 claims abstract description 253
- 238000012937 correction Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 description 20
- 230000005611 electricity Effects 0.000 description 19
- 230000006870 function Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 238000010248 power generation Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 241000208340 Araliaceae Species 0.000 description 4
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 4
- 235000003140 Panax quinquefolius Nutrition 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 235000008434 ginseng Nutrition 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Embodiment of the invention discloses that a kind of electric power networks and control method, device and system, relate to power domain, in order to improve the low problem of the power plant utilization rate caused in prior art or the grid type microgrid problem big to the demand of electrical network in order to meet the equilibrium of supply and demand of grid type microgrid.The method includes: N number of microgrid, and each microgrid includes: the first bus connected by potential device and the second bus, and the first bus is used for connecting power plant and load；The second bus in each microgrid is connected with the second bus of at least one other microgrid in N number of microgrid by interconnection, and interconnection is provided with interconnection switch, and interconnection switch connects for the microgrid controlling to be connected or disconnects；N number of microgrid is divided into M microgrid group, and each microgrid often organized is connected by interconnection, and each microgrid group is connected with electrical network supply line by points of common connection PCC, and in N number of microgrid, the second bus of at least one microgrid is connected with energy storage device.
Description
Technical field
The present invention relates to power domain, particularly relate to a kind of electric power networks and control method, device and system.
Background technology
Distributed energy with it efficiently, cleaning, the feature such as flexibly, can complement one another with traditional energy mode.Microgrid
(micro-grid), be again micro power network, micro-capacitance sensor, be the important Land use systems of one of distributed energy, be a kind of mainly by
The system that load and power plant (mainly comprising Distributed-generation equipment) collectively constitute.Microgrid both can be grid-connected with external electrical network
Run, it is also possible to isolated operation.
With reference to shown in Fig. 1, the microgrid being incorporated into the power networks with electrical network is i.e. grid type microgrid, and its feature is that inside has power plant
And load, by points of common connection with electrical network (also it is common connecting point, PCC:point of common can be called for short
Coupling) connection.
Grid type microgrid is substantially carried out the production and consumption balance of electric energy in the inside of below PCC, is usually operated at spontaneous
Personal state, not enough some electrical power is supplemented by electrical network, not to electrical network anti-power transmission power.Owing to microgrid anti-power transmission power may
With problems such as intermittent and freedom, the voltage pulsations of meeting influence area electrical network, so usual electrical network limits, microgrid is counter to be sent
The situation of electric current occurs.So grid type microgrid in order to meet the equilibrium of supply and demand it is possible to following two situation can be there is: a kind of feelings
Condition is to not to electrical network anti-power transmission power, limit the operation of the internal power plant of microgrid to a certain extent, such as exist
The time period that illumination condition is good and load is low, part photovoltaic generation can be caused to abandon, and the work of the equipment such as similar gas electricity generator
Make shutting down or the generation of the non-inferior situation of specified output state, cause operational efficiency low, may utilize year such as hourage reduction etc. and make
The problem that power plant utilization rate is low.Another kind of situation is to need electrical network to provide a large amount of electric power to grid type microgrid, especially when
Overload, i.e. the internal production capacity of microgrid, much smaller than load, may result in grid type microgrid big to the demand of electrical network.
Summary of the invention
Embodiments of the invention provide a kind of electric power networks and control method, device and system, for improving prior art
In due to the low problem of the power plant utilization rate that causes to meet the equilibrium of supply and demand of grid type microgrid or grid type microgrid
The problem big to the demand of electrical network, and provide a kind of new electric power networks, and microgrid power in this electric power networks is provided
Control program.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
First aspect, embodiments providing a kind of electric power networks, described electric power networks includes: N number of microgrid, described
N≥2；
Each described microgrid includes: the first bus connected by potential device and the second bus, and wherein, described first is female
Line is used for connecting power plant and load；The second bus in each described microgrid by interconnection and described N number of microgrid extremely
Second bus of few other microgrids is connected, and described interconnection is provided with interconnection switch, and described interconnection switch is used
Connect in the microgrid controlling to be connected or disconnect；
Described N number of microgrid is divided into M microgrid group, and each microgrid often organized is connected by described interconnection, and each microgrid group is led to
Crossing points of common connection PCC to connect with electrical network supply line, in described N number of microgrid, the second bus of at least one microgrid sets with energy storage
Standby connection, 1≤M≤N.
Optionally, each microgrid also includes: the access switch potential device between the first bus and the second bus is high
Pressure side switch.
Above-mentioned first aspect is a kind of electric power networks that the embodiment of the present invention provides, and electric power networks is to be combined by multiple microgrids
Run, then the electric power networks grid-connected with electrical network.Being connected by interconnection between microgrid, interconnection is provided with interconnection switch, connection
Winding thread on-off control connection and the disconnection of connected microgrid, can carry out energy exchange between the microgrid of connection.The present invention is real
As long as executing in the electric power networks that example is provided and being formed microgrid group by the connection of two or more microgrids, then the most permissible between microgrid
Carry out energy exchange (its electricity more than needed is supplied the microgrid that other electricity are short by the microgrid having).So embodiment of the present invention provides
Electric power networks in microgrid between can be carried out energy exchange, and be to carry out energy between microgrid of the prior art
Amount exchange.In electric power networks, add the energy storage device that the second bus with microgrid is connected simultaneously, make electric power networks
Regulate more flexible.Therefore, compared to existing technologies, the electric power networks that the embodiment of the present invention provides can improve in prior art
Problem that the power plant utilization rate that causes to meet the equilibrium of supply and demand of grid type microgrid is low or grid type microgrid are to electrical network
The big problem of demand.
Second aspect, embodiments providing the control method of a kind of electric power networks, described electric power networks is first
Electric power networks described in aspect；
Described control method includes: for each microgrid group comprising described energy storage device, network scheduling device obtains institute
Stating the Power operation that in microgrid group, any one microgrid allows interval, described Power operation interval includes: the also site of described microgrid
Maximum reverse power parameter and maximum forward power parameter；
The Power operation interval allowed by described microgrid sends the micro-net control device to described microgrid, in order to described microgrid
Control device interval with the Power operation that described microgrid allows according to the realtime power P of the also site of microgrid, determine described energy storage
The power adjustable strategies of equipment.
Optionally, the Power operation interval that in described acquisition described microgrid group, each microgrid allows includes: according to default
Time cycle, obtain the Power operation interval that described microgrid allows.
Optionally, the Power operation interval that in described acquisition described microgrid group, each microgrid allows includes: receive described micro-
The real time execution parameter of the described microgrid that the micro-net control device of net sends, described real time execution parameter includes:
Described microgrid and the realtime power parameter of site, and the power ascension ability of described microgrid and power reduces energy
Power, described realtime power parameter is used for obtaining realtime power value；
By described microgrid and real-time with in the historical time cycle of realtime power value in the current time period of site
Performance number weighted sum, obtains power prediction value；
Described power prediction value is entered by power ascension ability or the power reduction capabilities of described microgrid according to described microgrid
Row is revised, to obtain power correction value；
Determine that the Power operation that the interval comprising described power correction value allows as described microgrid is interval.
The third aspect, embodiments provide a kind of network scheduling device, be used for controlling electric power networks, described electric power
Network is the electric power networks described in first aspect, and for each described microgrid group, this device includes:
Acquiring unit, obtains, for network scheduling device, the Power operation district that in described microgrid group, any one microgrid allows
Between, described Power operation interval includes: the maximum reverse power parameter of the also site of described microgrid and maximum forward power parameter；
Transmitting element, the Power operation interval for being allowed by described microgrid sends the microgrid control dress to described microgrid
Put, in order to the Power operation district that described micro-net control device allows with described microgrid according to the realtime power P of the also site of microgrid
Between, determine the power adjustable strategies of described energy storage device.
Fourth aspect, embodiments providing the control method of a kind of electric power networks, described electric power networks is first
Electric power networks described in aspect；Wherein, the second bus of described energy storage device and the first microgrid connects, and described energy storage device is by institute
The first micro-net control device stating the first microgrid controls；
Described control method includes:
First micro-net control device obtains the power adjustable strategies of described energy storage device；
Described first micro-net control device controls described energy storage device according to the power adjustable strategies of described energy storage device
Power.
Optionally, the power adjustable strategies that described first micro-net control device obtains described energy storage device includes: described the
The Power operation that one micro-net control device receives the described first microgrid permission that network scheduling device sends is interval, and described power is transported
Row interval includes: the maximum reverse power parameter of the also site of described first microgrid and maximum forward power parameter；According to described
The realtime power P of the also site of the first microgrid is interval with the Power operation that described first microgrid allows, and determines described energy storage device
Power adjustable strategies；
Or,
Described first micro-net control device receives the second micro-net control device or the institute of described network scheduling device transmission
State the power adjustable strategies of energy storage device.
Optionally, the described merit allowed with described first microgrid according to the realtime power P of the also site of described first microgrid
Rate traffic coverage, determines that the power adjustable strategies of described energy storage device includes:
If described P is that negative value and described P are more than maximum reverse power, it is determined that the power of described energy storage device adjusts plan
Slightly, described power adjustable strategies includes: increases the discharge power of energy storage device or reduces the charge power of energy storage device；
And/or,
If P is that negative value and P are less than maximum reverse power, it is determined that the power adjustable strategies of described energy storage device, described merit
Rate adjustable strategies includes: reduces the discharge power of energy storage device or increases the charge power of energy storage device；
And/or,
If P be on the occasion of and P less than maximum forward power, it is determined that the power adjustable strategies of described energy storage device, described merit
Rate adjustable strategies includes: reduces the discharge power of energy storage device or increases the charge power of energy storage device；
And/or,
If P be on the occasion of and P more than maximum forward power, it is determined that the power adjustable strategies of described energy storage device, described merit
Rate adjustable strategies includes: increases the discharge power of energy storage device or reduces the charge power of energy storage device.
5th aspect, embodiments provide a kind of micro-net control device, be used for controlling electric power networks, described electric power
Network is the electric power networks described in first aspect, and the second bus of described energy storage device and the first microgrid connects, and described energy storage sets
Standby by the first micro-net control device control of described first microgrid；This device includes:
Acquiring unit, obtains the power adjustable strategies of described energy storage device for the first micro-net control device；
Control unit, controls institute for described first micro-net control device according to the power adjustable strategies of described energy storage device
State the power of energy storage device.
6th aspect, embodiments providing the control system of a kind of electric power networks, described electric power networks is first
Electric power networks described in aspect, this control system includes: described in network scheduling device described in the third aspect and the 5th aspect
Micro-net control device.
Above-mentioned second aspect to the 6th aspect is the control method of a kind of electric power networks of embodiment of the present invention offer, device
And system.For each microgrid group comprising energy storage device, network scheduling device obtains what any one microgrid in microgrid group allowed
Power operation is interval, and the Power operation interval allowed by this microgrid sends the micro-net control device to microgrid.This microgrid controls
Device receives the Power operation interval that network scheduling device sends, and permits with microgrid according to the realtime power P of the also site of microgrid
The Power operation permitted is interval, determines the power adjustable strategies of energy storage device.First micro-net control device obtains this energy storage device
Power adjustable strategies, and the power of this energy storage device is controlled according to the power adjustable strategies of this energy storage device.Thus by storage
The power adjustments of energy equipment, it is achieved that the regulation to microgrid power.Further improve in prior art grid-connected in order to meet
The equilibrium of supply and demand of type microgrid and the low problem of the power plant utilization rate that causes or grid type microgrid are big to the demand of electrical network
Problem.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment or description of the prior art
The required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only some realities of the present invention
Execute example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these accompanying drawings
Obtain other accompanying drawing.
The one single grid type microgrid structural representation that Fig. 1 provides for prior art；
One of electric power networks electric topology figure that Fig. 2 provides for the embodiment of the present invention；
The two of the electric power networks electric topology figure that Fig. 3 provides for the embodiment of the present invention；
One of control system figure of the electric power networks that Fig. 4 provides for the embodiment of the present invention；
The three of the electric power networks electric topology figure that Fig. 5 provides for the embodiment of the present invention；
One of flow chart of control method of electric power networks that Fig. 6 provides for the embodiment of the present invention；
The two of the flow chart of the control method of the electric power networks that Fig. 7 provides for the embodiment of the present invention；
Fig. 8 executes the one number axis of example offer to divide power interval schematic diagram for the present invention；
Fig. 9 (a) determines one of flow chart of power adjustable strategies for the micro-net control device that the embodiment of the present invention provides；
Fig. 9 (b) determines the two of the flow chart of power adjustable strategies for the micro-net control device that the embodiment of the present invention provides；
The three of the flow chart of the control method of the electric power networks that Figure 10 provides for the embodiment of the present invention；
One of block diagram controlling device of the electric power networks that Figure 11 provides for the embodiment of the present invention；
The two of the block diagram controlling device of the electric power networks that Figure 12 provides for the embodiment of the present invention；
The control system block diagram of a kind of electric power networks that Figure 13 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
For the ease of clearly describing the technical scheme of the embodiment of the present invention, in an embodiment of the present invention, have employed " the
One ", the printed words such as " second " to function with act on essentially identical identical entry or similar item makes a distinction, those skilled in the art can
To understand that quantity and execution order are not defined by the printed words such as " first ", " second ".
It addition, term " system " and " network " are the most often used interchangeably in the embodiment of the present invention.
Term "and/or" in the embodiment of the present invention, a kind of incidence relation describing affiliated partner, can there are three kinds of passes in expression
System, such as, A and/or B, can represent: individualism A, there is A and B, individualism B these three situation simultaneously.It addition, this
Character "/" in bright embodiment, typicallys represent the forward-backward correlation relation to liking a kind of "or".In describing the invention, unless
Being otherwise noted, " multiple " are meant that two or more.
Embodiment one
In prior art, single grid type microgrid is independent operating, but owing to not allowed from one-level micro-by PCC power
Net flows to the restriction of electrical network, thus causes the generated energy of the generating equipment of microgrid limited, or needs to roll up energy storage device.This
Plant way and can deviate the actual demand of microgrid, or the cost of investment of microgrid and operation cost are all raised.Therefore in the present invention
Embodiment provides a kind of novel electric power network to solve the problems referred to above.With reference to Fig. 2, in the electric power networks that this is new, this
Multiple microgrids are carried out interconnection connection by inventive embodiments, form united grid type microgrid, when multiple microgrids carry out associating fortune
During row, owing to the rule of product energy is different between microgrid, network complementary effect can be formed.It is to be appreciated that in below example
In description, one-level microgrid i.e. refers to that single microgrid, two grades of microgrids i.e. refer to be connected the grid type formed by multiple one-level microgrids
Microgrid.
First introducing the electric power networks that the embodiment of the present invention provides, this electric power networks is made up of N number of microgrid, wherein N
≥2.In the present embodiment as a example by N=3, with reference to Fig. 2, this electric power networks is by No. 1 microgrid, No. 2 microgrids, No. 3 microgrids these 3
Two grades of microgrids that level microgrid constitutes jointly.
Concrete, each microgrid includes as a example by No. 1 microgrid: the first bus (bus) 12 connected by potential device 11
With the second bus 13.First bus 12 connects the low-pressure side of potential device 11, example for 0.4kV low-voltage bus bar, and second is female
Line 13 connects the high-pressure side of potential device 11, example for 10kV high voltage bus.Wherein, the first bus 12 is used for connecting production capacity and sets
Standby and load.Power plant in microgrid mainly includes Distributed-generation equipment and the first energy storage device.It should be understood that be
Being easy to distinguish, in embodiments of the present invention, the energy storage device being connected with the first bus of microgrid is referred to as the first energy storage device；
The energy storage device being connected with the second bus of microgrid is referred to as the second energy storage device.Distributed-generation equipment is according to the technology of use
Difference, can be divided into thermoelectric cold cogeneration generating, internal combustion unit generation, gas turbine power generation, miniature hydro-power generation, wind-power electricity generation, too
Sun can photovoltaic generation, fuel cell etc.；First energy storage device mainly includes small-power energy-storage battery, and general power is less than 400kW；
Load is primarily referred to as using electric line.Wherein, generating equipment and the first energy storage device can be such as different equipment, Liang Zhexiang
Even so that send electric energy and can be stored in the first energy storage device；Both are also used as a single unit system and exist, now
First energy storage device can be as parts in generating equipment.Describe for convenience and understand, in the embodiment of the present invention
In accompanying drawing, photovoltaic power generation equipment, cogeneration, the first energy storage device represent power plant；Load is represented by electric line.
The second bus 13 in each microgrid is female with in N number of microgrid the second of at least one other microgrid by interconnection 14
Line 13 is connected；It is to say, there is not, in same two grades of microgrids, the one-level not being connected by interconnection with any microgrid
Microgrid.Example, with reference to shown in Fig. 2, for No. 1 microgrid, No. 1 microgrid and No. 2 microgrids are connected by interconnection 14；Right
For No. 3 microgrids, No. 3 microgrids and No. 2 microgrids are connected by interconnection 14；For No. 2 microgrids, No. 2 microgrids are respectively
It is connected by interconnection 14 with No. 1 microgrid, No. 3 microgrids.Example, interconnection 14 is 10kV high tension cable.On interconnection 14
Being provided with interconnection switch, this interconnection switch connects for the microgrid controlling to be connected or disconnects.
It is to be appreciated that the difference of " connection " and " connection " herein: " connection " refers to be connected but not necessarily communicates, and i.e. differs
Surely electric current is had to flow through；" connect " and refer to be connected and communicate, have electric current to flow through.Such as: two microgrids linked together, two are referred to
Individual microgrid interconnection connects together, but the switch on interconnection is likely to be at "on" position and is likely to be in gate-dividing state；Even
Two logical microgrids, refer to that two microgrid interconnections connect together, and the switch on interconnection are in "on" position.
Optionally, interconnection 14 can be public, is shared by the microgrid of more than 3.With reference to shown in Fig. 3, all microgrids
Linked together by a public interconnection.Interconnection 14 connects the part of each microgrid the second bus has interconnection to open
Close, for controlling connection or the disconnection of this microgrid and other microgrids.
Preferably, interconnection 14 is independent, only by used by two microgrids.With reference to shown in Fig. 2, two microgrids being often connected
Being connected by independent interconnection, independent interconnection refers to that this interconnection is only used for connecting two microgrids, and not with its
He connects by microgrid.Optionally, at least one end of interconnection 14 is provided with interconnection switch, it should be noted that interconnection here
One end do not refer to the end points of interconnection, but on interconnection in the part of microgrid the second bus 13, now this contact
Wiretap belongs to the microgrid at its second close bus 13 place, its separating brake and combined floodgate can be come by the micro-net control device of this microgrid
Control；Which end is provided with interconnection switch and does not represent its physical location, but it is micro-to show which this interconnection switch belongs to
Net.Such as on interconnection 14 switch of the interconnection in the part of No. 2 microgrid the second buses 13 17, this interconnection switch 17 genus
In No. 2 microgrids, separating brake and the combined floodgate of interconnection switch 17 can be controlled by the micro-net control device of No. 2 microgrids.The most independent connection
Winding thread, and at least one end be provided with interconnection switch can control the connection between two microgrids or disconnection the most flexibly, and
Do not affect the connection between the two microgrid and other microgrids or disconnection.
Preferably, the two ends of interconnection are respectively arranged with interconnection switch.Such as interconnection switch 17 on interconnection 14
Switching 18 with interconnection, now separating brake and the combined floodgate of interconnection switch 17 can be controlled by the micro-net control device of No. 2 microgrids, connection
Separating brake and the combined floodgate of winding thread switch 18 can be controlled by the micro-net control device of No. 1 microgrid.So can make two be connected micro-
In net, any one microgrid can control the disconnection of the two microgrid by the separating brake or combined floodgate controlling interconnection switch, such that it is able to
Make control more flexible.
N number of microgrid in this electric power networks is divided into M microgrid group, 1≤M≤N, and each microgrid often organized is by interconnection even
Logical, the exchange of energy can be carried out between the different microgrids in microgrid group.Here packet is not unalterable, along with micro-
The change of whether connected state between net, the division of microgrid group changes the most therewith.The present embodiment will be interconnected in two grades of microgrids
The combination of multiple (at least two) one-level microgrid is referred to as a microgrid group, it is also possible to by two grades of microgrids not with any other microgrid
One one-level microgrid of connection is referred to as a microgrid group.
So that each microgrid group is grid type, each microgrid group is powered with electrical network by points of common connection PCC
Circuit connects.Preferably, current embodiment require that in each microgrid group that at least a microgrid is by connecing at points of common connection PCC
Enter switch 15 and be connected to electrical network supply line.And group often only has one access switch and connect with described electrical network supply line, with
It is easy to the control to a microgrid group.
Two grades of microgrids that the embodiment of the present invention is provided can have one or more microgrid group, in same microgrid group
Owing to relying on interconnection connection between different microgrids, the most just can be carried out the exchange of energy by this interconnection, i.e. some one
The electricity more than needed of level microgrid counter can deliver to two grades of microgrids, supplies other one-level microgrids and uses.In microgrid group at least one micro-
Netcom crosses access switch and is connected to electrical network supply line, can have the electrical network supply line more than in i.e. one microgrid group,
But different electrical network supply lines is not necessarily identical due to frequency plot, it is impossible to power to same microgrid group simultaneously, because of
This each microgrid group has and an only electrical network supply line connection, powers for microgrid, other electrical network supply lines of this microgrid group
Road disconnects, and is in standby state.
Such as two shown in Fig. 2 grade microgrid, switchs the interconnection of No. 1, No. 2, No. 3 microgrid and all closes a floodgate, then composition one
Microgrid group.This microgrid group is connected with Liang Tiao electrical network supply line, and i.e. one is that No. 1 microgrid supplies with electrical network by accessing switch 15
Electric line is connected, and another is that No. 3 microgrids are connected with electrical network supply line by accessing switch 15.Wherein No. 1 microgrid phase
The mains supply line that electrical network supply line is this microgrid group even, and the electrical network supply line that No. 3 microgrids are connected is that this is micro-
The stand-by power supply circuit of net group.If a microgrid group has a plurality of electrical network supply line, the most preferably can be whole by calculating
The individual microgrid group electrical demand to electrical network, select one meet condition as mains supply line, it is whole for needing the condition met
Individual microgrid group not can exceed that the load threshold value in this supply line to the electrical demand of electrical network.If there being a plurality of electrical network supply lines
Road meets condition, and any bar in the most optional electrical network supply line meeting condition is as mains supply line.One microgrid group is such as
Fruit has a plurality of electrical network supply line, it is possible to when wherein an electrical network supply line breaks down, maybe can not meet above-mentioned condition
Time, or the long-term relation between supply and demand of each microgrid be varied such that need change network topology time, then stand-by power supply circuit just can become
Primary supply line, makes control more flexible.And access switch at each microgrid group only one PCC and connect with electrical network, reduce
The management difficulty of electrical network；In the present embodiment, this microgrid group of example connects with mains supply line, i.e. the access switch 15 of No. 1 microgrid
Closing a floodgate, the access of No. 3 microgrids switchs 15 separating brakes.
Based between above-mentioned each microgrid and the annexation assumed of microgrid and electrical network, according to the arrow side of each microgrid
To understanding, No. 2 microgrids have electricity more than needed, No. 1 microgrid and No. 3 microgrid electricity shortage, then No. 2 microgrids are delivered to counter for electricity more than needed
Two grades of microgrids, supply No. 1 microgrid and No. 3 microgrids use, if No. 1 microgrid and No. 3 microgrid electricity are the most not enough, then (the most main by electrical network
Supply line) provide.So can improve distributed power generation without reducing the generated energy of the Distributed-generation equipment of No. 2 microgrids
Utilization rate of equipment and installations；3 one-level microgrid cooperations reduce the overall demand to electrical network simultaneously.
Preferably, each microgrid in the electric power networks that the embodiment of the present invention provides also includes: be positioned at the first bus and the
Potential device high side switch between two buses.Potential device can be transformator in embodiments of the present invention, potential device
When high side switch can be to only have a potential device between the first bus and the second bus, as shown in Figure 2 micro-at No. 1
Potential device high side switch 16 between the first bus 12 and the second bus 13 in net；Potential device high side switch is also
When can be to have multiple potential device between the first bus and the second bus, between the first bus and the second bus, docking be many
Shared higher level's main switch of individual potential device.The effect of potential device high side switch is as in multiple microgrids of microgrid group
Individual generation catastrophe failure, as line short or generating equipment is out of control etc. catastrophe failure can involve other microgrids time, can be by only
Disconnect the potential device high side switch of this microgrid to isolate this microgrid, it is not necessary to change the state of other switches, so that its
His microgrid is unaffected.The most this method switchs all separating brakes compared to by the interconnection of this microgrid, may also can shadow further
For the state accessing switch rung at some PCC, controlling simpler, the infringement to device is the least.
Secondly, for above-mentioned electric power networks, the present embodiment additionally provides the control system of a kind of electric power networks, this control system
System includes: N number of micro-net control device, the network scheduling device being connected with N number of micro-net control device, wherein, N >=2, adjust with network
The network operation device that degree device is connected, and the device level controller being connected with micro-net control device.Wherein, device level controls
Device includes the controller of the first energy storage device, the controller of the second energy storage device, the controller of generating equipment, load governor
Deng.
In the present embodiment as a example by the electric power networks of three microgrid compositions, with reference to Fig. 4, the control system bag of this electric power networks
Include 3 micro-net control devices, i.e. No. 1 micro-net control device, No. 2 micro-net control devices and No. 3 micro-net control devices；And with 3
The network scheduling device that individual micro-net control device is connected.Wherein, each micro-net control device comes by controlling each device level controller
Complete the internal control of its microgrid to controlling, and be controlled by the network scheduling device of two grades of microgrids.Network scheduling device conduct
The management system of two grades of microgrids, has been used for the interface with electrical network (the access switch connected with electrical network) and has controlled, and to each micro-
The dispatch command of net.Such as: the control that integrated scheduling between each microgrid and microgrid group with which electrical network supply line connect
Completed by network scheduling device；The control of each microgrid power plant and load can be completed by respective micro-net control device.
With reference to shown in Fig. 4, in the embodiment of the present invention, network operation device is connected with network scheduling device.Network scheduling device
The service data of two grades of microgrids is sent to network operation device, carries out network operation management.Network operation device is for for N
Individual microgrid performs at least one in user's management, metering and transaction payment management, plant asset management, Operation Decision.Microgrid
Between constantly there is the two-way exchange of energy, and microgrid generally falls into different owners or closing unit, so needing energy
Real-time exchange amount is added up, and produces bill.The data that network operation device sends according to network scheduling device, constantly update system
Count.
Embodiments provide a kind of electric power networks, multiple one-level microgrids are connected by interconnection, forms two grades
Microgrid, owing to the production capacity of each one-level microgrid is different with the rule of load, then can provide mutually standby electricity.It is to say, can
To allow one-level microgrid anti-power transmission power in two grades of microgrids, thus the supply and demand interaction bottleneck of single grid type microgrid can be overcome, greatly
What amplitude improved power plant in microgrid utilizes level, especially improves photovoltaic generation, the generating of wind power generation distributed sets
Standby utilizes level.But, the scale of two grades of microgrid formation is the biggest, and the difficulty that its network operation controls is the highest, and problem mainly exists
In the freedom of one-level microgrid demand end and the generating intermittence of end and deposit.
The freedom of demand end: in one-level microgrid, user is random mostly to various energy resources demand and does not unify rule
's.That is in one-level microgrid, electricity consumption rule etc. is entirely according to user's each demand, is not in contact with each other, it is impossible to manage
Reason.
The intermittence of generating end: as a example by photovoltaic generation, photovoltaic power generation equipment is intermittent work according to illumination variation, becomes
Change that frequency is the shortest can reach 2～3 seconds.
Under the freedom of above-mentioned one-level microgrid demand end and the generating intermittence of end the extreme case deposited, two can be caused
Power Flow Problem in level microgrid, such as partial branch circuit overload, the overtension of high-voltage electrical apparatus node or too low etc..By two
The network scheduling device of level microgrid to the integrated scheduling of each one-level microgrid and each one-level micro-net control device to its power plant
Cooperating of control with load, can trend in (generally 15 minutes) solve above-mentioned two grades of microgrids within a certain period of time
Problem.But, limited by the specific condition of some one-level microgrids, it can be caused to be difficult to coordinate the overall of two grades of microgrids to control (two
The network scheduling device of the level microgrid integrated scheduling to each one-level microgrid), there is control office sex-limited.Wherein, the spy of one-level microgrid
Different condition limits it may be that such as: the 1) limitation of part generating equipment itself existence in one-level microgrid, it is impossible to undertake regulation
Function, such as photovoltaic and wind-power electricity generation, be substantially by intermittent natural lighting and wind-force.2) containing combustion in one-level microgrid
Gas cogeneration equipment, then in order to ensure that heating power is for seasonable, it is impossible to carry out electric adjustment, or can be tight if carried out electric adjustment
Ghost image rings combustion gas cogeneration equipment operating efficiency and even shuts down.
To sum up, micro-net control device needs to ensure the power plant within one-level microgrid and the load equilibrium of supply and demand, may
Postponing occurs in the order causing its response to network dispatching device, or due to the internal Distributed-generation equipment of one-level microgrid can not
Control, and cause can not the order etc. of response to network dispatching device, aggregate performance is network scheduling device and micro-net control device
Between cooperation control underaction, the system being not suitable for carrying out short cycle (controlling gap in 1 minute to 15 minute) controls.
Therefore, in the most N number of microgrid, the second bus of at least one microgrid is connected with energy storage device.Should
Second energy storage device preferably large power energy storage equipment, is connected on the high-pressure side of one-level microgrid potential device, and power arrives at 500kW
Several megawatts, generally large power energy storage battery.In two grades of microgrids, the second energy storage device and all microgrids are at same electric joint
On point, it absorbs or the electric current of releasing can directly arrive each microgrid, say, that the second energy storage device can be whole
Two grades of microgrid services.In two grades of microgrids, the second energy storage device can have multiple, it is desirable that be less than the individual of one-level microgrid
Number, and in the case of meeting whole two grades of microgrid needs, the number of the second energy storage device is the fewest more good.Because the second storage
Energy equipment is arranged on the high-pressure side of microgrid, if its number, can affect stablizing of the voltage of whole microgrid too much.The merit of energy storage device
Rate can be charge power, it is also possible to be discharge power, and the discharge and recharge rated power of energy storage device is equal.
In two grades of microgrids, the number of the second energy storage device and be connected on the second bus of which one-level microgrid be ginseng
The needs of kind and the scale of examining the Distributed-generation equipment in the number of one-level microgrid and one-level microgrid etc. set.
Example, with reference to shown in Fig. 2, No. 1 microgrid, No. 2 microgrids, No. 3 microgrid these three microgrids connect group by interconnection
Become two grades of microgrids.Wherein, compared to No. 1 microgrid and No. 3 microgrids, No. 2 microgrids are main distributed with photovoltaic generation
Electricity equipment, and the installation of its photovoltaic power generation equipment is larger.Good at illumination condition, in the case of load is relatively low, No. 2 microgrids can be to
Two grades of anti-power that send of microgrid, but owing to the intermittence of illumination or the irregularities of load are it is possible to make No. 2 microgrids to two grades of microgrids
Anti-power is sent to have intermittence；No. 2 microgrids also have combustion gas triple supply equipment, it is known that in order to ensure heat supply/confession cold mission, combustion gas
Triple supply equipment must keep certain operating power, and (such as 60% arrives
Between 100%), and its governing speed is slower.Therefore, on the second bus of No. 2 microgrids, connection has the second energy storage
Equipment 19.
Concrete, this second energy storage device 19 accesses with 10kV electric pressure, and power is up to 500kW to several megawatts.When No. 2
When microgrid has electricity more than needed, anti-power transmission amount to two grades microgrid, the second energy storage device just can absorb this electricity more than needed.When No. 2 micro-
During the load bigger electricity shortage netted, the second energy storage device just can discharge electricity and supply No. 2 microgrids uses.In like manner, due to
Two energy storage devices and 3 microgrids on same electrical node, therefore No. 1, No. 3 anti-electric power sent of microgrid can also be by the second storage
Can absorb by equipment, the electricity of the second energy storage device release can also supply No. 1, No. 3 microgrids uses.Namely the second energy storage device
It is to service whole two grades of microgrids.
Therefore, the embodiment of the present invention sets by increasing adjustable second energy storage on the 10kV high voltage bus of one-level microgrid
Standby, compensate for the cooperation retardance of one-level microgrid and two grades of microgrids, shorten the control cycle (between 1 minute to 15 minute controls
Gap) so that the control motility of electric power networks gets a promotion.
Again, the embodiment of the present invention needs the power in electric power networks to be controlled (regulation), in order to understand the application
The direction of middle electric energy (current/power) and the implication of symbol, make following provisions in the present embodiment:
Mainly two grades, the current/power collection point microgrid of the electric power networks that the embodiment of the present invention provides is connected to the grid also
Site (can be PCC) and one-level microgrid are incorporated to two grades of microgrids site (can be potential device high side switch position).
Current/power positive and negative: it be negative that general provision electric current flows into bus, electric current outflow bus is just.So power is also
Being the same, it is negative that power flows into bus, and it is just that power flows out bus.It should be understood that at the accompanying drawing of the embodiment of the present invention
In, the direction of arrow all represents the flow direction of current/power.In two grades of microgrids shown in reference Fig. 5 of example, No. 1 microgrid, No. 2 micro-
Net, No. 3 these 3 microgrid connection one microgrid groups of composition of microgrid.Arrow in the flow direction such as figure of current/power in electrical network and 3 microgrids
Shown in head direction.Then, it is known that the current/power now collected at No. 1 microgrid PCC is negative, when direction and current direction phase
Inverse time, then current/power is positive；And the current/power collected at No. 1 micro-grid connection point is positive, No. 2 micro-grid connection
The current/power that point collects is negative.
The positive direction of the current/power of the positive direction of current/power, opposite direction: PCC refers to from power network line micro-to two grades
Net injects the direction of electric energy, i.e. in Fig. 5, at current No. 1 microgrid PCC, the direction of current/power is to work as front in positive direction, with Fig. 5
It is the opposite direction of the current/power of PCC in the opposite direction.Same, and the positive direction of the current/power of site refers to two grades
Microgrid injects the direction of electric energy to one-level microgrid, i.e. in Fig. 5, at current No. 1 micro-grid connection point, the direction of current/power is square
To；At current No. 2 micro-grid connection points, the direction of current/power is opposite direction.
Visible, due to two grades of microgrid collection points (PCC) and the difference of one-level microgrid collection point (micro-grid connection point) position, lead
Caused to be similarly positive direction, current/power positive and negative on the contrary.Such as: in Fig. 5, the current/power direction of No. 1 microgrid PCC is just
Direction, but current/power is negative；No. 1 micro-grid connection point current/power direction is also positive direction, but current/power is just
's.It should be understood that following, for the ease of describing, positive direction is called for short forward, and opposite direction is called for short reversely, current/power reversely,
Reverse current/power, anti-power transmission power etc. are meant that current/power is reciprocal.
Embodiment two
Embodiments provide a kind of control method for above-mentioned electric power networks, with reference to shown in Fig. 6, each step
Executive agent is network scheduling device, and concrete steps include:
S601 (optionally), network scheduling device receive the real time execution ginseng of the microgrid of the micro-net control device transmission of microgrid
Number.
Wherein, the real time execution parameter of microgrid includes: the realtime power parameter of the also site of microgrid, and the power of microgrid
Hoisting power and power reduction capabilities.The realtime power parameter of the also site of microgrid can include the wattful power of micro-grid connection point
One or more in rate, reactive power, power factor, voltage and current.Realtime power parameter is used for being calculated real-time merit
Rate value, realtime power value is the active power value of micro-grid connection point.Such as, if realtime power parameter be reactive power and power because of
Number, then can pass through formula active power=reactive power/(1-power factor) and obtain；If realtime power parameter be power because of
Number, voltage and current, then can be obtained by formula active power=voltage * electric current * power factor；Other are existing seeks wattful power
The formula of rate can also, be not described in detail in this.
Owing to the present embodiment defining both forward and reverse directions and the sign symbol of power/current, therefore, when one-level microgrid also
The active power of site, reactive power, electric current be on the occasion of time, then it represents that power/current forward, now power/current is from two
Level microgrid flows to one-level microgrid；When the power/current of the also site of microgrid is negative value, then it represents that power/current is reverse,
Now power/current flows to two grades of microgrids from one-level microgrid.And the power of PCC is generally not capable of reversely, so the PCC of microgrid group
Realtime power parameter is forward all the time, owing to being now to flow into microgrid bus, therefore represents by negative value.
Example, with reference to shown in Fig. 5, No. 1 microgrid, No. 2 microgrids, 3 microgrids of No. 3 microgrids interconnection connects composition one
Two grades of microgrids, existing by the interconnection switch combined floodgate between No. 1 microgrid and No. 2 microgrids, the contact between No. 2 microgrids and No. 3 microgrids
Wiretap closes a floodgate, then three microgrid connection one microgrid group cooperations of composition.The electric current of wherein No. 1, No. 3 micro-grid connection point/
Power direction is forward, and the current/power direction of No. 2 micro-grid connection points is reverse, then the reverse electricity flowed out from No. 2 microgrids
Stream/power, then can be absorbed by No. 1 microgrid and/or No. 3 microgrids.In microgrid group, the backward power of some microgrid is by other microgrids
Being absorbed, in microgrid group, which microgrid has backward power or has several microgrid to have backward power unfettered.It is to say, work as
In microgrid group shown in Fig. 5, No. 2 microgrids and No. 3 microgrid current/power are reverse, when No. 1 microgrid current/power is still forward, that
No. 2 microgrids, the reverse current/power of No. 3 microgrids can also be absorbed by No. 1 microgrid.In the present embodiment preferably, Ren Yiwei
Net group not in electrical network foldback electric energy, arbitrary microgrid group the summation of the reverse current/power of each micro-grid connection point be not more than
The summation of forward current/power, certainly, in a microgrid group, the summation of the reverse current/power of each micro-grid connection point can be 0,
Now in this microgrid group, the current/power of each micro-grid connection point is forward.
Preferably, each micro-net control device, according to the default time cycle, sends this microgrid to network scheduling device and controls
The real time execution parameter of the microgrid that device is controlled, wherein, a microgrid of a microgrid group is by a PCC with power network line even
Logical, thus the micro-net control device of this microgrid can also obtain the realtime power parameter of PCC of this microgrid, and by the reality of this PCC
Time power parameter send to network scheduling device.
Now, the realtime power parameter of the real time execution parameter of No. 1 microgrid and PCC can be sent out by No. 1 micro-net control device
To network scheduling device；The real time execution parameter of No. 2 microgrids can be issued network scheduling device by No. 2 micro-net control devices；No. 3 micro-
The real time execution parameter of No. 3 microgrids can be issued network scheduling device by network control device.
Accordingly, network scheduling device can be according to the default time cycle (cycle that the most each micro-net control device sends)
Receive the real time execution parameter of each microgrid in the realtime power parameter of the PCC of each microgrid group and this microgrid group.
Example, this predetermined period can be 15～60 minutes, such as, can be that every 15 minutes network scheduling devices receive
Once.
S602, for each microgrid group comprising the second energy storage device, network scheduling device obtains any one in microgrid group
The Power operation that microgrid allows is interval.
It should be understood that for the ease of distinguishing, in embodiments of the present invention, the energy storage being connected with the first bus of microgrid
Equipment is referred to as the first energy storage device；The energy storage device being connected with the second bus of microgrid is referred to as the second energy storage device.
Wherein, microgrid allow Power operation interval include: described microgrid and site maximum reverse power parameter and
Maximum forward power parameter.And site owing to the present embodiment defining positive direction and the sign symbol of power/current, therefore,
Backward power parameter be always negative value, forward power parameter be always on the occasion of, and, the size of backward power parameter is with its absolute value
Size be as the criterion, i.e. the absolute value of backward power parameter is the biggest, then it is assumed that this backward power parameter is the biggest, wherein maximum reverse merit
The numerical value of maximum absolute value in that rate parameter is microgrid and that site is allowed backward power parameter.
This is preferably a step: according to the default time cycle, obtain the Power operation interval that described microgrid allows.Example
, this time cycle preset can be identical with the cycle of step S601, is i.e. immediately performed this step after having carried out step S601
Suddenly.Certainly, if not performing step S601, the cycle the most here can set as desired, and example can be 15～60 points
Clock, such as, can be every 15 minutes.Optionally, for the acquisition in the Power operation interval that microgrid allows, can be according to actual warp
Test and set corresponding Power operation interval for each microgrid.Such as: can be that staff is by the friendship with network scheduling device
Interface inputs the Power operation interval of each microgrid mutually；Further, can regulate at set intervals and once (re-enter one
Secondary).The most such as: multiple Power operation can also be prestored in network scheduling device interval so that be at set intervals
Each microgrid selects one from the multiple Power operation intervals prestored, and the mode wherein selected can be optional one,
Can also is that the rule according to presetting therefrom selects.
Preferably, the network scheduling device of two grades of microgrids can receive the real time execution ginseng of microgrid according to step S601
Number, carries out short term power prediction and calculates the Power operation interval that microgrid allows.
Concrete, by the realtime power value in the current time period of the also site of microgrid and the reality in the historical time cycle
Time performance number weighted sum, obtain power prediction value.Realtime power value in current time period can be current time period
The meansigma methods of interior realtime power value, the time cycle can be 15-60 minute, such as 15 minutes.The weight of weighted sum is permissible
Set as the case may be, do not limit at this.The historical time cycle can be the previous time cycle of current time period,
Can also be period corresponding to some day, other reasonable historical time cycles also can, here is omitted.Power according to microgrid
Power prediction value is modified by the power reduction capabilities of hoisting power or microgrid, to obtain power correction value；Determine and comprise merit
The Power operation that one interval of rate correction value allows as microgrid is interval.It should be understood that final Power operation interval can
To be the interval using power correction value as border, it is also possible to be that power correction value is multiplied by again a correction factor or plus-minus one
Individual correction factor also may be used as the interval on border, other reasonable situation.
Example, it is right with the history same day (such as yesterday) that the meansigma methods of the realtime power of current 15 minutes is multiplied by weight 0.6
The meansigma methods answering the realtime power of period is multiplied by the sum of weight 0.4, i.e. obtains power prediction value.Power prediction value is carried with power
The difference of the ability of liter is modified the maximum reverse power that obtains again as the interval left margin of Power operation.Again in which is carried out
Correction can be that the difference to power prediction value Yu power ascension ability takes absolute value and is multiplied by a correction factor or plus-minus the most again
One correction factor, then takes negative value.By power prediction value and power reduction capabilities and be again modified the maximum obtained
Forward power as the interval right margin of Power operation as power correction value.Again in which is modified can being power prediction
Value and power reduction capabilities and take absolute value and be multiplied by a correction factor the most again or add and subtract a correction factor, just then taking
Value.
S603, the Power operation interval allowed by microgrid send the micro-net control device to microgrid.
Concrete, the network scheduling device of two grades of microgrids is by the communication between network scheduling device and micro-net control device
Power operation interval is sent the micro-net control device to one-level microgrid by circuit.Example, as a example by Fig. 5, network scheduling device
The Power operation interval that No. 1 microgrid allows can be sent to No. 1 micro-net control device, the Power operation allowed by No. 2 microgrids
Interval transmission sends to No. 3 micro-net control devices to No. 2 micro-net control devices, the Power operation interval allowed by No. 3 microgrids.
After micro-net control device receives the control command that Power operation that network scheduling device sends is interval, microgrid micro-
Network control device is interval with the Power operation that microgrid allows according to the realtime power P of the also site of microgrid, determines that the second energy storage sets
Standby power adjustable strategies.Owing to the cycle of network scheduling device transmitting order to lower levels can be 15 minutes to 60 minutes, upper once
Before transmitting order to lower levels, the Power operation interval that micro-net control device can have been used up in this control command received carries out merit
Rate regulates.
Embodiments provide the control method of a kind of electric power networks, for by multiple microgrid cooperations, then with
The electric power networks that electrical network is grid-connected.The Power operation that network scheduling device obtains its microgrid controlled is interval, and controls dress to microgrid
Put this Power operation of transmission interval.Achieve the power to the electric power networks that the embodiment of the present invention provides to control.
Embodiment three
Present embodiments providing the control method of a kind of electric power networks, wherein, electric power networks is with above-mentioned electric power networks.With
Under the concrete steps of a kind of method controlling electric power networks that provide for the embodiment of the present invention, with reference to Fig. 7.The execution master of each step
Body is the first micro-net control device, comprises the second energy storage device, the second energy storage device and the first microgrid in its microgrid controlled
Second bus connects, and the second energy storage device is controlled by the first micro-net control device of the first microgrid.
It should be understood that for the ease of distinguishing, in embodiments of the present invention, the energy storage being connected with the first bus of microgrid
Equipment is referred to as the first energy storage device；The energy storage device being connected with the second bus of microgrid is referred to as the second energy storage device.
S701 (optionally), the first micro-net control device send the first micro-net control device to network scheduling device and are controlled
The real time execution parameter of the first microgrid.
Can also be that the second micro-net control device sends the second microgrid control to network scheduling device in embodiments of the present invention
The real time execution parameter of the second microgrid that device processed is controlled.The real time execution parameter of concrete first microgrid or the second microgrid is permissible
With reference to the real time execution parameter of the microgrid of embodiment two, do not repeating at this.
Example, as a example by Fig. 5, it is known that, No. 2 microgrids are the first microgrids, and No. 1 microgrid and No. 3 microgrids are the second microgrids.Institute
Can be now No. 2 micro-net control devices real time execution parameters to network scheduling device No. 2 microgrids of transmission, it is also possible to be 1
Number micro-net control device sends the real time execution parameter of No. 1 microgrid to network scheduling device, it is also possible to be No. 3 micro-net control devices
The real time execution parameter of No. 3 microgrids is sent to network scheduling device.
It should be understood that in the description of the embodiments below, in order to describe as a example by the simplicity No. 2 microgrids in Fig. 5
One microgrid, describes the second microgrid as a example by No. 1 microgrid.
Accordingly, the real-time fortune that network scheduling device can send according to micro-net control device according to the step of embodiment two
The Power operation that line parameter obtains the microgrid permission that this micro-net control device controls is interval.
Example, if the real time execution parameter of microgrid that No. 2 microgrids (the first microgrid) send to network scheduling device, then
It is interval that network scheduling device can obtain, according to the step of embodiment two, the Power operation that No. 2 microgrids allow, and is sent to No. 2 the
One microgrid.If the real time execution parameter of the first microgrid that No. 1 microgrid (the second microgrid) sends to network scheduling device, then network
Dispatching device can obtain, according to the step of embodiment two, the Power operation interval that No. 1 microgrid allows, and is sent to No. 1 microgrid.
S702 (optionally), the first micro-net control device receive the power of the first microgrid permission that network scheduling device sends
Traffic coverage.
Can also be in embodiments of the present invention the second micro-net control device receive that network scheduling device sends second micro-
The Power operation that net allows is interval.
This step can be specifically the micro-net control device time cycle with certain predetermined, within such as 15～60 minutes, receives
The Power operation once allowed is interval.
Wherein, Power operation interval includes: Power operation interval includes: the maximum reverse power parameter of the also site of microgrid
With maximum forward power parameter.According to the above-mentioned power/current both forward and reverse directions for microgrid and the regulation of sign symbol, this enforcement
In example and the backward power parameter of site is always negative value, forward power parameter be always on the occasion of, and, the size of backward power parameter
Be as the criterion with the size of its absolute value, i.e. the absolute value of backward power parameter is the biggest, then it is assumed that this backward power parameter is the biggest, wherein
The numerical value of maximum absolute value in that maximum reverse power parameter is microgrid and that site is allowed backward power parameter.
One-level microgrid is counter send power number, be to be allowed by the network scheduling device of two grades of microgrids this one-level microgrid of ordering
Power operation interval determines.Therefore, the anti-size sending power of one-level microgrid can not exceed its traffic coverage.
The maximum reverse power parameter P of micro-grid connection point in the present embodiment-maxRepresenting, maximum forward power parameter is used
PmaxRepresent, therefore P-max、0、PmaxNumber axis is divided into 4 intervals, as shown in Figure 8, is respectively less than P-maxInterval 1, be more than
Equal to P-maxInterval 2 less than 0, more than 0 less than or equal to PmaxInterval 3, and more than PmaxInterval 4.
It should be noted that any one in adjacent two intervals can be divided in equal to the situation on border.Such as: be equal to
P-maxSituation can be divided into interval 1, now interval 2 is more than P-maxLess than 0.Based on this, above-mentioned interval division is all right
There is multiple change, illustrate the most one by one at this.
S703, the first micro-net control device obtain the power adjustable strategies of the second energy storage device.
The scheme of the power adjustable strategies that the first micro-net control device obtains the second energy storage device has two kinds: one is first
The pass in the Power operation interval that micro-net control device allows according to realtime power P and first microgrid of the also site of the first microgrid
System, determines the power adjustable strategies of the second energy storage device；Another kind is that the first micro-net control device receives the second microgrid control dress
Put or the power adjustable strategies of the second energy storage device that network scheduling device sends.Both scheme is described more fully below
Process.
Scheme the 1, first micro-net control device according to the first microgrid and realtime power P and the first microgrid permission of site
Power operation is interval, determines the power adjustable strategies of the second energy storage device.
First micro-net control device timing (1～5 second) refreshes the real time data of the first microgrid, wherein, the reality of the first microgrid
Time data include: the realtime power P of micro-grid connection point, the realtime power of the second energy storage device.
Example, with reference to shown in Fig. 5, No. 2 micro-net control devices refresh the real time data of No. 2 microgrids.No. 2 concrete microgrids
Real time data include: the realtime power P of No. 2 micro-grid connection points, the second energy storage device energy storage device of 10kV bus (connect)
Realtime power etc..
The also realtime power P of site is compared in real time by the first micro-net control device with the Power operation interval of setting.
Optionally, if P is that negative value and P are more than maximum reverse power (being i.e. in the interval 2 of Fig. 8), it is determined that the second energy storage
The power adjustable strategies of equipment, power adjustable strategies includes: increases the discharge power of the second energy storage device or reduces the second energy storage
The charge power of equipment.
It should be understood that P is negative value, illustrates when previous stage microgrid is to two grades of anti-power that send of microgrid, and P is in the merit set
In rate traffic coverage, can suitably increase the discharge power of the second energy storage device or reduce the charge power 50kW of the second energy storage device
～100kW.If but the discharge power that now the second energy storage device has been maxed out, or the second energy storage device need change
Current charging and discharging state, then avoid the need for regulating again the power of the second energy storage device.Because frequently changing the second energy storage
The charging and discharging state of equipment, can affect its life-span.
It addition, P is equal to the situation of maximum reverse power, it is also possible to carry out according to above-mentioned power adjustable strategies.
Optionally, if P is that negative value and P are less than maximum reverse power (being i.e. in the interval 1 of Fig. 8), it is determined that the second energy storage
The power adjustable strategies of equipment, power adjustable strategies includes: reduces the discharge power of energy storage device or increases the second energy storage device
Charge power；
It addition, P is equal to the situation of maximum reverse power, it is also possible to carry out according to above-mentioned power adjustable strategies.
Optionally, if P be on the occasion of and P less than maximum forward power (being i.e. in the interval 3 of Fig. 8), it is determined that the second energy storage
The power adjustable strategies of equipment, power adjustable strategies includes: reduces the discharge power of the second energy storage device or increases the second energy storage
The charge power of equipment.
It should be noted that when previous stage microgrid is to two grades of microgrid absorbed powers, now need suitably to reduce the second energy storage
The discharge power of equipment or the charge power 50～100kW of increase the second energy storage device.If but now the second energy storage device
The charge power having been maxed out, or the second energy storage device needs to change current charging and discharging state, or P has exceeded maximum
Forward power, then avoid the need for regulating again the power of the second energy storage device.
It addition, P is equal to the situation of maximum reverse power, it is also possible to carry out according to above-mentioned power adjustable strategies.
Optionally, if P be on the occasion of and P more than maximum forward power (being i.e. in the interval 4 of Fig. 8), it is determined that the second energy storage
The power adjustable strategies of equipment, power adjustable strategies includes: increases the discharge power of the second energy storage device or reduces the second energy storage
The charge power of equipment.
It addition, P is equal to the situation of maximum reverse power, it is also possible to carry out according to above-mentioned power adjustable strategies.
Scheme the 2, first micro-net control device receives the second micro-net control device or the second of the transmission of network scheduling device
The power adjustable strategies of energy storage device.
In this programme, the power adjustable strategies of the second energy storage device is determined by the second micro-net control device.
The Power operation that second micro-net control device receives the second microgrid permission that network scheduling device sends is interval.Second
The pass in the Power operation interval that micro-net control device allows according to realtime power P and second microgrid of the also site of the second microgrid
System, determines the power adjustable strategies of the second energy storage device.Above-mentioned detailed process is referred to the specific implementation process in scheme 1,
Do not repeat them here.
It is micro-that the power adjustable strategies of the second energy storage device that the second micro-net control device can be determined is sent to first
Network control device, or it is sent to network scheduling device, it is micro-that this power adjustable strategies is sent to first by network scheduling device again
Network control device, then by the first micro-net control device according to this control the second energy storage device of the power adjustable strategies received
Power.
Two grades of microgrids can be directly adjusted by the second energy storage device in the potential device high-pressure side of microgrid, not only reduces
Loss, it is often more important that can not be only served in the first microgrid, also can serve the second microgrid of periphery when capacity is had more than needed, expand
The big service area of the second energy storage device.
S704, the first micro-net control device control the second energy storage device according to the power adjustable strategies of the second energy storage device
Power.
Circulation step S703-S704 at least one times, adds the second energy storage device, it is possible at microgrid in electric power networks
And site realtime power more than maximum forward power when, by increasing the discharge power of the second energy storage device or reducing the
The charge power of two energy storage devices, so that the realtime power of microgrid group PCC will not be excessive, even if microgrid is to the demand of electrical network not
Can be the biggest.Also site realtime power at microgrid, less than the when of in maximum reverse power, is not required to equally pass through to prior art
The utilization rate of power plant in the production capacity power of power plant in reduction microgrid, i.e. reduction microgrid.
And the second energy storage device possesses quickly, the characteristic of bidirectional power response, the regulation to the second energy storage device is
Minute level, relative to the power of the power plant in regulation microgrid, can faster response.
Concrete, the second energy storage device has the controller controlling himself and running, and the first micro-net control device can be by
The power adjustable strategies obtained by step S703 issues the controller (control interface) of the second energy storage device, in order to the second energy storage sets
Standby controller can control the running status of the second energy storage device according to this adjusted value.Wherein, adjustable strategies can only have
Controlling the second energy storage device increase or reduce its charge-discharge electric power, then the controller of the second energy storage device combines this adjustable strategies
The second energy storage device is controlled with the power adjustment preset；Adjustable strategies can also both include control the second energy storage device
Increasing or reduce its charge-discharge electric power, including again power adjustment, then the controller of the second energy storage device is according to this adjustment plan
Slightly control the second energy storage device.
Above-mentioned adjusted value can be the target power set by power of the second energy storage device, can be the second energy storage device
Required increase or reduce performance number (i.e. target power with adjust before the difference of power), it is also possible to be the second energy storage device institute
The ratio (i.e. the difference of target power and the front power of adjustment and the ratio adjusting front power) etc. that needs increase or reduce；It addition,
Adjusted value can have positive and negative, increases on the occasion of representing, negative value represents reduction.In a word, if inform controller its controlled second
The required direction adjusted of energy storage device and degree.
It should be noted that, above-mentioned adjusted value can use certain algorithm set in advance to be calculated.
Example, for simplicity, the present embodiment can use simple algorithm complete.Example, before adjusting, power is permissible
It is set to P0, adjusted value is T, then the algorithm of setting can be P0+ T, now, T is that the second energy storage device is required to be increased or reduces
Performance number；Can also be P0+P0* T is now, and T is the required ratio increased or reduce of the second energy storage device.Certainly other
Reasonable algorithm can also, here is omitted.
It should be noted that in concrete implementation process, the selection principle of the power adjustable strategies of the second energy storage device
It is: the preferential current state (charge or discharge state) keeping the second energy storage device, reduces/increase the power of its current state.
If the power reduction of the second energy storage device to predetermined threshold value (such as: 10kW) below time, the most not up to control target, then switch
The charging and discharging state of two energy storage devices；If the power of the second energy storage device increases to the peak power of current state, then make second
Energy storage device keeps this peak power to run.
Example, with reference to shown in Fig. 5, the realtime power P of No. 2 micro-grid connection points is in reversely, the first situation: assume
Now P is more than maximum reverse power, and the second energy storage device is in charged state.So may determine that the second energy storage device
Adjustable strategies be: first reduce the charge power of the second energy storage device, circulation step S703-S704, if after n-th circulation,
When the power reduction of the second energy storage device is to below 10kW, P is still greater than maximum reverse power, then (n+1)th circulation is stored up second
Can equipment be switched to discharge condition by charged state, increase its discharge power.The second situation: assume that now P is more than maximum
Backward power, and the second energy storage device is in discharge condition.So may determine that the adjustable strategies to the second energy storage device is:
First increase the discharge power of the second energy storage device, circulation step S703-S704, if its discharge power increases after n-th circulation
To maximum, then the second energy storage device is made to keep this maximum discharge power to work.
In a word, the selection of power adjustable strategies is according to the second energy storage device current operating state, the Based Intelligent Control made.
So select the method for adjustable strategies on the one hand just can reach when adjustment is less according to the second energy storage device current operating state
Can control flexibly during target, on the other hand avoid the second energy storage device as far as possible and make due to frequently changing of charging and discharging state
It is impaired that it runs impedance, affects its life-span.
The concrete control flow of above-mentioned steps S703-S704, with reference to shown in Fig. 9 (a), is the first microgrid control with executive agent
Illustrating as a example by device processed, executive agent is that the second micro-net control device is referred to the following power tune determining the second energy storage device
The flow process of whole strategy.Optionally, concretely comprise the following steps:
S91, micro-net control device timing (1～5 second) refreshes the real time data of its microgrid controlled, wherein, the reality of microgrid
Time data include the realtime power P of micro-grid connection point, the realtime power of the second energy storage device.
S92, it is judged that whether P is negative value.If P is negative value, then performs S93, otherwise perform S96.
S93, it is judged that whether P is less than P-max.If P is less than P-max, then S94 is performed；Otherwise, S95 is performed.
S94, if the second energy storage device is discharge condition, then reduces the discharge power of the second energy storage device；Or, if second
Energy storage device is charged state, then increase the charge power of the second energy storage device.
Above-mentioned adjustable strategies is issued the controller of the second energy storage device, the second energy storage device controller by micro-net control device
Second energy storage device is adjusted.
S95, if the second energy storage device is discharge condition, increases the discharge power of the second energy storage device, or, if the second storage
Can equipment be charged state, reduce the charge power of the second energy storage device.
S96, it is judged that whether P is more than PmaxIf P is more than Pmax, then S97 is performed.Otherwise perform S98.
S97, if the second energy storage device is discharge condition, increases the discharge power of the second energy storage device, or, if the second storage
Can equipment be charged state, reduce the charge power of the second energy storage device.
S98, if the second energy storage device is discharge condition, reduces the discharge power of the second energy storage device, or, if the second storage
Can equipment be charged state, increase the charge power of the second energy storage device.
Optionally, the concrete control flow of above-mentioned steps S703-S704, it is also possible to perform in the following order, the most such as
Under, with reference to Fig. 9 (b),
First carry out S91；Then S96 is performed, it is judged that whether P is more than Pmax；If more than Pmax, then perform S97, otherwise perform
S93；S93, it is judged that whether P is less than P-max；If less than P-max, then perform S94, otherwise perform S92；S92, it is judged that whether P is negative
Value；If P is negative value, performs S95, otherwise perform S98.
The full implementation process of above-described embodiment two and embodiment three is referred to shown in Figure 10:
On second bus of the first microgrid connect have the second energy storage device, the first micro-net control device control the first microgrid and
Second energy storage device；Being not connected with the second energy storage device on second bus of the second microgrid, the second micro-net control device controls second
Microgrid.Can there is following two scheme.
Scheme 1, step is as follows:
S801a, the first micro-net control device send the real time execution parameter of the first microgrid to network scheduling device；
S802, network scheduling device receive the real time execution parameter of the first microgrid and obtain the power fortune that the first microgrid allows
Row interval；
S803a, network scheduling device send, to the first micro-net control device, the Power operation interval that the first microgrid allows；
S804a, the first micro-net control device receive the Power operation interval that network scheduling device sends, and determine the second storage
The power adjustable strategies of energy equipment；
The power that S807, the first micro-net control device send the second energy storage device to the controller of the second energy storage device adjusts
Strategy；
S808, the controller of the second energy storage device receive the power adjustable strategies that the first micro-net control device sends, and right
The power of the second energy storage device is adjusted.
Scheme 2, step is as follows:
S801b, the second microgrid control dress value and send the real time execution parameter of the second microgrid to network scheduling device；
S802, network scheduling device receive the real time execution parameter of the second microgrid, and obtain the power that the second microgrid allows
Traffic coverage；
S803b, network scheduling device send, to the second micro-net control device, the Power operation interval that the second microgrid allows；
S804b, the second micro-net control device receive the Power operation interval that network scheduling device sends, and determine the second storage
The power adjustable strategies of energy equipment；
S805b, the second micro-net control device send the power adjustable strategies of the second energy storage device to network scheduling device；
S806b network scheduling device sends the second storage determined by the second micro-net control device to the first micro-net control device
The power adjustable strategies of energy equipment；
S807, the first micro-net control device send to the controller of the second energy storage device and are determined by the second micro-net control device
The power adjustable strategies of the second energy storage device；
S808, the controller of the second energy storage device receive the power adjustable strategies that the first micro-net control device sends, and right
The power of the second energy storage device is adjusted.
Can also be by step S805c replacement step S805b and S806b in scheme 2.
S805c, the second micro-net control device are determined by the second micro-net control device to the first micro-net control device transmission
The power adjustable strategies of the second energy storage device.
Concrete steps details is referred to embodiment two and embodiment three, is not repeating.
Embodiments provide the control method of a kind of electric power networks, for by multiple microgrid cooperations, then with
The electric power networks that electrical network is grid-connected.Micro-net control device sends real-time parameter to the timing of network scheduling device, and receives network scheduling
The Power operation that each microgrid that device sends allows is interval, then interval according to the P of micro-grid connection point and the Power operation of permission
Relation determine power adjustable strategies, and the second energy storage device controlling microgrid performs this power adjustable strategies.So can make
The Power operation that micro-net control device sends according to network scheduling device is interval, determines the merit to the second energy storage device that it controls
Rate adjustable strategies, and according to this power adjustable strategies, the second energy storage device is adjusted.Achieve and the embodiment of the present invention is carried
The quick control of the electric power networks power of confession.
Embodiment four
Embodiments providing a kind of network scheduling device, for electric power networks, described electric power networks is above-mentioned
Electric power networks, this device can be software or hardware, and wherein the realization of each functional module is referred to above-described embodiment two,
This repeats no more.As shown in figure 11, this device includes:
Acquiring unit 111, obtains, for network scheduling device, the Power operation that in described microgrid group, any one microgrid allows
Interval, described Power operation interval includes: the maximum reverse power parameter of the also site of described microgrid and maximum forward power ginseng
Number；
Transmitting element 112, the Power operation interval that the described microgrid for being obtained by acquiring unit 111 allows sends to institute
State the micro-net control device of microgrid, in order to described micro-net control device is micro-with described according to the realtime power P of the also site of microgrid
The Power operation that net allows is interval, determines the power adjustable strategies of described second energy storage device.
It should be understood that for the ease of distinguishing, in embodiments of the present invention, the energy storage being connected with the first bus of microgrid
Equipment is referred to as the first energy storage device；The energy storage device being connected with the second bus of microgrid is referred to as the second energy storage device.
Optionally, described acquiring unit 111 is additionally operable to, according to the default time cycle, obtain the power that described microgrid allows
Traffic coverage.
Optionally, described acquiring unit 111 also includes, receives subelement 1111, for receiving the microgrid control of described microgrid
The real time execution parameter of the described microgrid that device processed sends, described real time execution parameter includes: the reality of the also site of described microgrid
Time power parameter, and the power ascension ability of described microgrid and power reduction capabilities, described realtime power parameter is used for obtaining
Realtime power value；
Determine subelement 1112, for by described microgrid and site current time period in realtime power value with go through
Realtime power value weighted sum in the history time cycle, obtains power prediction value；Power ascension ability according to described microgrid or
Described power prediction value is modified by the power reduction capabilities of described microgrid, to obtain power correction value；Determine described in comprising
The Power operation that one interval of power correction value allows as described microgrid is interval.
It should be noted that acquiring unit 111 can be to possess reception on the control device of electric power networks in the present embodiment
The interface circuit of function has coordinated with processor, such as: can be obtained for asking for Power operation district by interface circuit
Between parameter, preprocessor to ask for obtaining Power operation according to these parameters interval；Can certainly be hardware circuit according to
It is interval that these parameters ask for obtaining Power operation.Example, interface circuit can be receiver or information receiving interface.Send single
Unit 112 can be that the interface circuit controlling to possess on device sending function of electric power networks completes, such as: can pass through interface
Circuit sends the Power operation interval order that microgrid allows, and example, interface circuit can be transmitter or information transmission interface.
These unit can also be for the processor individually set up, it is also possible to be integrated in some processor of network of network dispatching device
Middle realization, in addition it is also possible to be stored in the memorizer of network of network dispatching device with the form of program code, by network
Some processor of network scheduling device calls and performs the function of above unit.Processor described here can be
One central processing unit (English full name: Central Processing Unit, English abbreviation: CPU), or specific integrated
Circuit (English full name: Application Specific Integrated Circuit, English abbreviation: ASIC), or quilt
It is configured to implement one or more integrated circuits of the embodiment of the present invention.
Embodiments provide a kind of network scheduling device, for the electric power networks of embodiment of the present invention offer, real
Having showed network scheduling device is that micro-net control device determines that the Power operation of permission is interval, in order to micro-net control device is according to this merit
Rate traffic coverage determines the power adjustable strategies of the second energy storage device.
Embodiment five
Embodiments providing a kind of micro-net control device, for electric power networks, described electric power networks is above-mentioned
Electric power networks, this device can be software or hardware, and wherein the realization of each functional module is referred to above-described embodiment three,
This repeats no more.As shown in figure 12, this device includes:
Acquiring unit 121, obtains the power adjustable strategies of described second energy storage device for the first micro-net control device；
It should be understood that for the ease of distinguishing, in embodiments of the present invention, the energy storage being connected with the first bus of microgrid
Equipment is referred to as the first energy storage device；The energy storage device being connected with the second bus of microgrid is referred to as the second energy storage device.
Control unit 122, described second obtained according to described acquiring unit 121 for described first micro-net control device
The power adjustable strategies of energy storage device controls the power of described second energy storage device.
Optionally, described acquiring unit 121 also includes: receives subelement 1211 and connects for described first micro-net control device
The Power operation receiving the described first microgrid permission that network scheduling device sends is interval, and described Power operation interval includes: described
The maximum reverse power parameter of the also site of the first microgrid and maximum forward power parameter；Determine that subelement 1212 is for according to institute
The realtime power P of the also site stating the first microgrid is interval with the Power operation that described first microgrid allows, and determines described second storage
The power adjustable strategies of energy equipment；
Optionally, described acquiring unit 121 also includes: receives subelement 1211 and is additionally operable to described first micro-net control device
Receive the power adjustable strategies of described second energy storage device of the second micro-net control device or the transmission of described network scheduling device.
Optionally, described determine subelement 1212 specifically for according to described first microgrid and the realtime power P of site
Interval with the Power operation that described first microgrid allows, determine that the power adjustable strategies of described second energy storage device includes:
If described P is that negative value and described P are more than maximum reverse power, it is determined that the power of described second energy storage device adjusts
Strategy, described power adjustable strategies includes: increases the discharge power of the second energy storage device or reduces the charging of the second energy storage device
Power；
And/or,
If P is that negative value and P are less than maximum reverse power, it is determined that the power adjustable strategies of described second energy storage device, institute
State power adjustable strategies to include: reduce the discharge power of the second energy storage device or increase the charge power of the second energy storage device；
And/or,
If P be on the occasion of and P less than maximum forward power, it is determined that the power adjustable strategies of described second energy storage device, institute
State power adjustable strategies to include: reduce the discharge power of the second energy storage device or increase the charge power of the second energy storage device；
And/or,
If P be on the occasion of and P more than maximum forward power, it is determined that the power adjustable strategies of described second energy storage device, institute
State power adjustable strategies to include: increase the discharge power of the second energy storage device or reduce the charge power of the second energy storage device.
It should be noted that the acquiring unit 121 in the present embodiment can be to possess on the control device of electric power networks to connect
Receive the interface circuit of function, such as receiver or information receiving interface.Receive the control dress that subelement 1211 can be electric power networks
Put and possess what the interface circuit of receive capabilities completed, such as: can receive, by interface circuit, the Power operation that microgrid allows
Interval, example, interface circuit can be receiver or information receiving interface.Other unit can be the process individually set up
Device, it is also possible to be integrated in some processor controlling device of electric power networks and realize, in addition it is also possible to program code
Form is stored in the memorizer controlling device of electric power networks, some processor controlling device of electric power networks call
And perform the function of above unit.Processor described here is identical with embodiment four.
Embodiments provide a kind of network scheduling device, for the electric power networks of embodiment of the present invention offer, real
Show the first micro-net control device the fast power of the second energy storage device is regulated.
Embodiment six
Embodiments providing the control system of a kind of electric power networks, described electric power networks is above-mentioned power network
Network, with reference to Figure 13, this control system includes: the network scheduling device described in embodiment four and the microgrid described in embodiment five control
Device.Wherein the realization of each device is referred to above-described embodiment, does not repeats them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method are permissible
Realize by another way.Such as, device embodiment described above is only schematically, such as, and described unit
Dividing, be only a kind of logic function and divide, actual can have other dividing mode, the most multiple unit or assembly when realizing
Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or
The coupling each other discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communication connection, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that the independent physics of unit includes, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can realize to use the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit and realizes.
The above-mentioned integrated unit realized with the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server, or the network equipment etc.) performs the portion of method described in each embodiment of the present invention
Step by step.And aforesaid storage medium includes: (Read-Only Memory is called for short for USB flash disk, portable hard drive, read only memory
ROM), random access memory (Random Access Memory is called for short RAM), magnetic disc or CD etc. are various can store
The medium of program code.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent；
And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (11)
1. an electric power networks, it is characterised in that including: N number of microgrid, described N >=2；
Each described microgrid includes: the first bus connected by potential device and the second bus, and wherein, described first bus is used
In connecting power plant and load；The second bus in each described microgrid is by interconnection and described N number of microgrid at least one
Second bus of other microgrids individual is connected, and described interconnection is provided with interconnection switch, and described interconnection switch is used for controlling
The microgrid that system is connected connects or disconnects；
Described N number of microgrid is divided into M microgrid group, and each microgrid often organized is connected by described interconnection, and each microgrid group is by public affairs
Junction point PCC connects with electrical network supply line altogether, and in described N number of microgrid, the second bus of at least one microgrid is with energy storage device even
Connect, 1≤M≤N.
Electric power networks the most according to claim 1, it is characterised in that each described microgrid also includes: be positioned at the first bus
And the potential device high side switch that second between bus.
3. the control method of an electric power networks, it is characterised in that described electric power networks is the electric power described in claim 1 or 2
Network；
Described control method includes: for each microgrid group comprising described energy storage device, network scheduling device obtains described micro-
The Power operation that in net group, any one microgrid allows is interval, and described Power operation interval includes: described microgrid and site
Big backward power parameter and maximum forward power parameter；
The Power operation interval allowed by described microgrid sends the micro-net control device to described microgrid, in order to described microgrid controls
Device is interval with the Power operation that described microgrid allows according to the realtime power P of the also site of microgrid, determines described energy storage device
Power adjustable strategies.
Control method the most according to claim 3, it is characterised in that in described acquisition described microgrid group, each microgrid allows
Power operation interval include:
According to the default time cycle, obtain the Power operation interval that described microgrid allows.
5. according to the control method described in claim 3 or 4, it is characterised in that each microgrid in described acquisition described microgrid group
The Power operation interval allowed includes:
Receive the real time execution parameter of the described microgrid of the micro-net control device transmission of described microgrid, described real time execution parameter bag
Include:
Described microgrid and the realtime power parameter of site, and the power ascension ability of described microgrid and power reduction capabilities,
Described realtime power parameter is used for obtaining realtime power value；
By the realtime power value in the current time period of the also site of described microgrid and the realtime power in the historical time cycle
Value weighted sum, obtains power prediction value；
Described power prediction value is repaiied by power ascension ability or the power reduction capabilities of described microgrid according to described microgrid
Just, to obtain power correction value；
Determine that the Power operation that the interval comprising described power correction value allows as described microgrid is interval.
6. the control method of an electric power networks, it is characterised in that described electric power networks is the electric power described in claim 1 or 2
Network；Wherein, the second bus of described energy storage device and the first microgrid connects, and described energy storage device is by the of described first microgrid
One micro-net control device controls；
Described control method includes:
First micro-net control device obtains the power adjustable strategies of described energy storage device；
Described first micro-net control device controls the power of described energy storage device according to the power adjustable strategies of described energy storage device.
Control method the most according to claim 6, it is characterised in that
The power adjustable strategies that described first micro-net control device obtains described energy storage device includes: described first microgrid controls dress
Putting the Power operation interval receiving the described first microgrid permission that network scheduling device sends, described Power operation interval includes:
The maximum reverse power parameter of the also site of described first microgrid and maximum forward power parameter；According to described first microgrid also
The Power operation that the realtime power P of site allows with described first microgrid is interval, determines that the power of described energy storage device adjusts plan
Slightly；
Or,
Described first micro-net control device receives the second micro-net control device or the described storage of described network scheduling device transmission
The power adjustable strategies of energy equipment.
Control method the most according to claim 7, it is characterised in that
The described realtime power P according to the also site of described first microgrid is interval with the Power operation that described first microgrid allows,
Determine that the power adjustable strategies of described energy storage device includes:
If described P is that negative value and described P are more than maximum reverse power, it is determined that the power adjustable strategies of described energy storage device, institute
State power adjustable strategies to include: increase the discharge power of energy storage device or reduce the charge power of energy storage device；
And/or,
If P is that negative value and P are less than maximum reverse power, it is determined that the power adjustable strategies of described energy storage device, described power is adjusted
Whole strategy includes: reduces the discharge power of energy storage device or increases the charge power of energy storage device；
And/or,
If P be on the occasion of and P less than maximum forward power, it is determined that the power adjustable strategies of described energy storage device, described power is adjusted
Whole strategy includes: reduces the discharge power of energy storage device or increases the charge power of energy storage device；
And/or,
If P be on the occasion of and P more than maximum forward power, it is determined that the power adjustable strategies of described energy storage device, described power is adjusted
Whole strategy includes: increases the discharge power of energy storage device or reduces the charge power of energy storage device.
9. a network scheduling device, it is characterised in that be used for controlling electric power networks, described electric power networks is claim 1 or 2
Described electric power networks, for each microgrid group comprising described energy storage device, this device includes:
Acquiring unit, obtains, for network scheduling device, the Power operation that in described microgrid group, any one microgrid allows interval, institute
State Power operation interval to include: the maximum reverse power parameter of the also site of described microgrid and maximum forward power parameter；
Transmitting element, the Power operation interval that the described microgrid for being obtained by described acquiring unit allows sends to described microgrid
Micro-net control device, in order to described micro-net control device according to microgrid and realtime power P and the described microgrid of site allow
Power operation interval, determine the power adjustable strategies of described energy storage device.
10. a micro-net control device, it is characterised in that be used for controlling electric power networks, described electric power networks be claim 1 or
Second bus of the electric power networks described in 2, described energy storage device and the first microgrid connects, and described energy storage device is by described first micro-
First micro-net control device of net controls；This device includes:
Acquiring unit, obtains the power adjustable strategies of described energy storage device for the first micro-net control device；
Control unit, for the power of the described energy storage device that described first micro-net control device obtains according to described acquiring unit
Adjustable strategies controls the power of described energy storage device.
The control system of 11. 1 kinds of electric power networks, it is characterised in that described electric power networks is the electric power described in claim 1 or 2
Network, this control system includes: the network scheduling device described in claim 9 and the microgrid described in claims 10 control dress
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817474.4A CN106253345B (en) | 2016-09-12 | 2016-09-12 | A kind of electric power networks and its control method, device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817474.4A CN106253345B (en) | 2016-09-12 | 2016-09-12 | A kind of electric power networks and its control method, device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106253345A true CN106253345A (en) | 2016-12-21 |
| CN106253345B CN106253345B (en) | 2018-12-18 |
Family
ID=57599611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610817474.4A Active CN106253345B (en) | 2016-09-12 | 2016-09-12 | A kind of electric power networks and its control method, device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106253345B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649700A (en) * | 2019-10-15 | 2020-01-03 | 深圳市高斯宝电气技术有限公司 | Method for preventing user circuit from reversely transmitting power to power grid |
| CN112366738A (en) * | 2020-11-03 | 2021-02-12 | 安徽奥里奥克科技股份有限公司 | Little electric wire netting power storage control system of guarantee elevator power supply |
| CN112766571A (en) * | 2021-01-19 | 2021-05-07 | 西安交通大学 | Distributed and centralized cooperative micro-grid group scheduling method |
| CN113078648A (en) * | 2021-03-31 | 2021-07-06 | 安徽天能清洁能源科技有限公司 | System energy scheduling optimization method and system based on microgrid controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130099565A1 (en) * | 2011-04-15 | 2013-04-25 | Deka Products Limited Partnership | Modular power conversion system |
| CN203690940U (en) * | 2013-11-28 | 2014-07-02 | 国家电网公司 | Nested-type microgrid system |
| CN104410076A (en) * | 2014-12-12 | 2015-03-11 | 新奥科技发展有限公司 | Distributed energy network system, microgrid, network scheduling system and forming method thereof |
| CN104466997A (en) * | 2014-11-28 | 2015-03-25 | 广东易事特电源股份有限公司 | Hierarchical distributed micro-grid energy-storage battery configuration method |
-
2016
- 2016-09-12 CN CN201610817474.4A patent/CN106253345B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130099565A1 (en) * | 2011-04-15 | 2013-04-25 | Deka Products Limited Partnership | Modular power conversion system |
| CN203690940U (en) * | 2013-11-28 | 2014-07-02 | 国家电网公司 | Nested-type microgrid system |
| CN104466997A (en) * | 2014-11-28 | 2015-03-25 | 广东易事特电源股份有限公司 | Hierarchical distributed micro-grid energy-storage battery configuration method |
| CN104410076A (en) * | 2014-12-12 | 2015-03-11 | 新奥科技发展有限公司 | Distributed energy network system, microgrid, network scheduling system and forming method thereof |
Non-Patent Citations (2)
| Title |
|---|
| TIANGUANG LV, ETC.: ""An interactive operation model for distribution network with multi-microgrids to optimize wind power integration"", 《 RENEWABLE POWER GENERATION (RPG 2015), INTERNATIONAL CONFERENCE, IEEE》 * |
| 江润洲，等: ""含储能系统的多微网智能配电系统经济运行"", 《电网技术》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649700A (en) * | 2019-10-15 | 2020-01-03 | 深圳市高斯宝电气技术有限公司 | Method for preventing user circuit from reversely transmitting power to power grid |
| CN110649700B (en) * | 2019-10-15 | 2024-05-17 | 深圳市高斯宝电气技术有限公司 | Method for preventing user circuit from reversely transmitting power to power grid |
| CN112366738A (en) * | 2020-11-03 | 2021-02-12 | 安徽奥里奥克科技股份有限公司 | Little electric wire netting power storage control system of guarantee elevator power supply |
| CN112366738B (en) * | 2020-11-03 | 2023-03-14 | 安徽奥里奥克科技股份有限公司 | Little electric wire netting power storage control system of guarantee elevator power supply |
| CN112766571A (en) * | 2021-01-19 | 2021-05-07 | 西安交通大学 | Distributed and centralized cooperative micro-grid group scheduling method |
| CN112766571B (en) * | 2021-01-19 | 2023-08-04 | 西安交通大学 | Distributed and centralized coordinated micro-grid group scheduling method |
| CN113078648A (en) * | 2021-03-31 | 2021-07-06 | 安徽天能清洁能源科技有限公司 | System energy scheduling optimization method and system based on microgrid controller |
| CN113078648B (en) * | 2021-03-31 | 2024-02-09 | 安徽尚特杰电力技术有限公司 | System energy scheduling optimization method and system based on micro-grid controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106253345B (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4944578B2 (en) | Self-sustaining operation method of low-voltage system and self-sustaining operation system of low-pressure system | |
| CN105552940B (en) | Distributed global optimum's EMS based on alternating direction Multiplier Algorithm | |
| CN106253345B (en) | A kind of electric power networks and its control method, device and system | |
| CN107346896A (en) | A kind of light stores up micro-grid system energy accumulation current converter host-slave parallel control method | |
| JP2008125295A (en) | Method and device for selecting/interrupting load in consumer | |
| CN109755938B (en) | Active power distribution network and control method thereof | |
| JP6976851B2 (en) | Real-time adaptive distributed intermittent power coupled to the grid | |
| CN110854927A (en) | Island type micro-grid distributed cooperative control method | |
| CN109830976A (en) | A kind of alternating current-direct current mixing distribution elasticity of net operation regulation method | |
| CN106655253A (en) | Single-/three-phase multi-micro-grid region dynamic partitioning method | |
| CN106253344B (en) | A kind of electric power networks and its control system and control method, network scheduling device | |
| US9989949B2 (en) | Grid tied, real time adaptive, distributed intermittent power | |
| Cossentino et al. | A multi-agent architecture for simulating and managing microgrids | |
| CN106253346B (en) | A kind of control method of electric power networks, apparatus and system | |
| Phurailatpam et al. | Demand side management system for future buildings | |
| Abedini et al. | Adaptive energy consumption scheduling of multi-microgrid using whale optimization algorithm | |
| CN112821418A (en) | System and method for dynamically adjusting optical storage and charging multi-target power | |
| CN106253348B (en) | A kind of electric power networks and its control method, device and system | |
| CN106253347A (en) | The control method of a kind of electric power networks, Apparatus and system | |
| CN113131497B (en) | Small hydropower microgrid power balance control method for electric automobile participating in planned island | |
| CN107069714A (en) | The power network transient current control system that can be communicated between intelligent switch and controller | |
| WO2021087003A1 (en) | Method and apparatus for tertiary control of microgrids with integrated over-current protection | |
| CN110707752A (en) | Day-ahead day-based coordinated optimization scheduling method for independent micro-grid considering unit flexibility | |
| CN106655260B (en) | A kind of micro-capacitance sensor and its grid-connected leave net seamless handover method | |
| Cheng et al. | Partition-global Dual-Layer Collaborative Voltage Control Strategy for Active Distribution Network with High Proportion of Renewable Energy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| OL01 | Intention to license declared |