CN106786773A - A kind of distributed power grid system - Google Patents
A kind of distributed power grid system Download PDFInfo
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- CN106786773A CN106786773A CN201710074076.2A CN201710074076A CN106786773A CN 106786773 A CN106786773 A CN 106786773A CN 201710074076 A CN201710074076 A CN 201710074076A CN 106786773 A CN106786773 A CN 106786773A
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Abstract
The invention provides a kind of distributed power grid system, it includes one-level node, two grades of electric power networks, the first two-level node, first user, the second two-level node, second user, the 3rd two-level node and the 3rd users.The electrical equipment of wherein described user carries out electric energy exchange by respective two-level node and two grades of electric power networks, and the first nodes can be coordinated to carry out electric energy exchange by two grades of electric power networks between different two-level nodes.
Description
Technical field
The invention belongs to the network system in power domain, especially, for the distributed power grid that distributed power grid is used
System.
Background technology
With the development of society, demand more and more higher of the mankind to the energy.And because the consumption of fossil energy can be to environment
Fatal influence is produced, therefore, craving of the mankind to clean energy resource is increasingly strong.Common clean energy resource has wind energy, solar energy
And geothermal energy etc..
However, for the actual acquisition of clean energy resource, haveing the shortcomings that more or less.For example, wind-power electricity generation is unstable,
Can not surf the Net in time；Also or the wind energy in certain region, solar energy are superfluous, it is impossible to output to user power utilization region.
In addition, being all to need large-scale energy enrichment region for the addressing of geothermal energy, wind energy and solar energy acquisition
Domain.Also, current building method is still gathered according to region, the method for concentrating inversion online, and this has resulted in zonule energy
Source cannot collect, inefficiency.And if build substantial amounts of factory building, then can take a large amount of places.
Family of domestic consumer is still intended only as the consumer of electric energy simultaneously, it is impossible to participate in electrical energy production link.And
Electrical energy production person and consumer apart from remote, more using main power network --- the structure of-branch, in this way, causing main power network line wave
Take, region load remains high.
In this regard, industry is proposed hybrid energy-storing terminal to attempt solving this problem, and rely on these distribution mixing storages
Energy terminal constructs out Distributed Area power network.Clean energy resource is collected by hybrid energy-storing terminal, and is translated into electric energy and deposited
Storage is got up, and then according to actual needs, the electric energy of these storages can voluntarily be used by user, also be may be incorporated into power network and sold.
Industry after the Distributed Area power network for releasing this new structure, by its have when actually used it is excellent
Point so that industry continues to increase the popularization and application to it, while industry is also caused to its continuous input research and development, to obtain more preferably
Using effect.
The content of the invention
It is an object of the invention to provide a kind of distributed power grid system, its circulation path that can shorten internal current,
So that line loss reduction, and then effectively reduce grid power load.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of distributed power grid system, it includes one-level node, two grades of electric power networks, the first two-level node, first user, second
Two-level node, second user, the 3rd two-level node and the 3rd user.The electrical equipment of wherein described user passes through respective two grades
Node and two grades of electric power networks carry out electric energy exchange, and the first nodes can be coordinated to pass through institute between different two-level nodes
Stating two grades of electric power networks carries out electric energy exchange.When using, when first user needs electric energy, it can send request, and described one
Level node can respond the request, and coordinate the two-level node of second user and/or the 3rd user to two grades of electric power networks
Power supply, and the first user is then that electric energy is absorbed from two grades of electric power networks by its first two-level node, and supply
Its electrical equipment is used.
Further, in different embodiments, wherein the node at different levels includes energy storage, (and, off-network) inversion, direct current
At least one function in charging, man-machine interaction, networking, communication function.
Further, in different embodiments, wherein the communication being directed to use with the communication function of the node at different levels
Network includes at least one in wired, wireless, mobile network, power line carrier network, and the communication network is level net
Network.
Further, in different embodiments, wherein the energy storage mode of the node at different levels includes alternating current energy storage side
At least one in formula and direct current energy storage mode.
Further, in different embodiments, wherein the node all has main supply side and main Demand-side, and it is described
The electricity collection mode that node is used is at least one in following four mode：
1st, when its DC side meets setting voltage, then the DC side energy is absorbed；
2nd, after receiving the order matching information of main supply side, electric energy is absorbed from power network；
3rd, main Demand-side electric energy is remaining, absorbs unnecessary electric energy, stabilization line voltage；
4th, electric energy is conveyed by the way of parallel network reverse, with specified current flow, voltage output to power network.
Further, in different embodiments, wherein the power transmission mode inside the network system is, Ge Jijie
Point receives the public key information that main supply side network is sent, and the public key information of oneself is broadcasted to main Demand-side.Wherein described node
The information of its main supply side network is sent to, asymmetric encryption is carried out using the public key information of main supply side.
Further, in different embodiments, wherein the public key of the node stores peace inside it with private key information
In full module, the security module is communicated by smartcard smart card standard agreements with network system, wherein the safety
Module has unique number, and internal private key is not associated with numbering.
Further, in different embodiments, wherein the node all has main supply side and main Demand-side, when first
When the main Demand-side of two-level node produces electrical energy demands, powered by the main supply side of its superior node, now node energy storage is empty；To institute
State first nodes and send power request, the first nodes are coordinated to Demand-side, bring the two or two grade of section of second user together
Point supplies specified amount electric energy by two grades of electric power networks to supply side, and first two-level node then passes through two grades of power network
Network absorbs the electric energy, and carries out line loss compensation.The coordination of the first nodes brings result together after with public key dual signature
Information is sent to Demand-side network.
Further, in different embodiments, wherein first two-level node and the second two-level node use private key
Unpacked, obtained the mode temporal information of power supply/power taking；Second two-level node is with the first nodes and the one or two grade
The public key of node carries out dual signature to packet, first two-level node receive after with the first nodes and the two or two grade
Node public key is encrypted back package informatin, and second two-level node is powered, and first first nodes absorb electric energy.
Further, in different embodiments, wherein the electricity consumption of the first user being followed by when first two-level node
When demand stops, then subsequent operation is that first two-level node absorbs electric energy by itself energy storage device relay；Or, such as
Electrical energy transportation need to be closed, is then sent to close to power with the public key dual signature of second two-level node and the first nodes and is asked
Ask, second two-level node terminates power supply after receiving.
Further, in different embodiments, wherein the node all has main supply side and main Demand-side, described one
Level node can also monitor its main Demand-side line voltage, when it finds that its main Demand-side line voltage is raised, then can open certainly
Body is charged, and energy is absorbed and stored from main Demand-side.
Further, in different embodiments, wherein there is one-level in the two-level node does not find electric power networks
During node, then it is closed to this grade of output function of electric power networks, and user is followed by it and pointed out.Now, described two grades
Node is in off-network state, and it only carries out charging operations, and realizes peak load shifting electric energy optimizing function.
Further, for convenience of distributed power grid system of the present invention, its internal system fabric user, to close
The price purchase electric energy of reason.Further embodiment of the invention, additionally provides a kind of distributed power grid system of the present invention
System is used, the autonomous vending method of node electric energy, and it with the pressure price for receiving be the first priority price, fabric use that it is
Family sets price as the second priority price, and node automatically generates price for third priority price.
User's setting direct current source often spends electricity price lattice P1, is such as not provided with, then DC side of the Nodes Systems according to setting
Energy mode CF, capacity C V are estimated.Wherein evaluation method can be inquired about by inquiring about mechanism to the standard price of setting
CF mode unit capacity prices.
User sets main supply side highest energy storage check prince P2.The minimum electricity price of selling of downstream site is then by P1 and P2
Average computation is carried out, system is offered to be not less than the price to its higher level's node.The downstream site of the superior node is equal
Price data is sent to its superior node so that superior node forms price pond, and the superior node is according to these price datas
Follow-up coordination is carried out to bring together.
The lowest bid in the downstream site from the price pond of superior node carries out " buying in " request, broadcasts the information, if
Responded, then electric energy exchange can be carried out according to electric energy conversion method of the present invention.
Further, in one embodiment, the selling price of the node can be higher level's section of its main supply side
Point selling price is average with absorption energy value.
Further, in one embodiment, when higher level's node detects main Demand-side voltage reduction, and main power supply
Unnecessary electric energy is unable to supply in side, then reclaim main Demand-side subordinate node price with ceiling price to Web broadcast, if subordinate ties
Point user does not forbid responding the request, then then the downstream site is exported to main supply side inversion, completes overall grid stabilization.
Further, when actually used, distributed power grid system of the present invention, its can according to current electricity prices and
When the conventional use habit of its dependent user and current energy storage level are to determine that downstream site needs electric energy again, if by leading
Supply side is powered.Peak of power consumption, and energy-storage system are for example currently located in close to saturation, direct current input is abundant, then subordinate's section
The requirement of the main Demand-side of point can be that the electric energy stored by internal energy-storage system preferentially meets.
Relative to prior art, the beneficial effects of the invention are as follows：
1. distributed power grid system of the present invention, can rely on existing electric structure construction from principal mode electric power networks, be not required to
Existing electric network composition is overthrown completely, reduce social resources consumption；
2. user power utilization network minimal can be realized；
3. do not need somewhat complex design, construction to be capable of achieving zonule power network autonomous operation；
4. the optimization to electric energy peak load shifting is realized；
5. automatic electricity price, rather than simple step price can be realized；
6. main grid power load can be reduced effectively, and the circulation path of electric current shortens, line loss reduction.
Brief description of the drawings
Fig. 1 is a kind of building-block of logic of Intelligent Hybrid energy storage for power supply terminal that an embodiment of the invention is provided.
Specific embodiment
Below with reference to drawings and Examples, a kind of technical scheme of distributed power grid system of the present invention is made into
The detailed description of one step.
Refer to shown in Fig. 1, an embodiment of the invention provides a kind of distributed power grid system, and it includes one-level
Node, two grades of electric power networks, first user, second user, the 3rd user ... N users.Each of which user is by respective
Two-level node is connected with two grades of electric power networks, and is connected in parallel between each two-level node.The first nodes can be coordinated
Between different two-level nodes electric energy exchange is carried out by two grades of electric power networks.
Further, the node at different levels has energy storage, (and, off-network) inversion, DC charging, man-machine interaction, networking, logical
Telecommunication function etc. function, function listed above is citing, and, in actual applications, nodal functions at different levels can be carried out with the need
Increase or delete, and unrestrictedly.In addition, the node used in electric power networks at different levels only has the difference on power, functionally without
Difference.Wherein described node can be specifically hybrid energy-storing terminal, and it passes through the work(for using different capacity to implement nodes at different levels
Energy.
The energy storage of wherein described node can carry out energy storage by alternating current, or direct current.Specifically, direct current
Electric charging energy-storing can provide setting for direct current output by solar panel, wind-driven generator, tital generator etc.
It is standby, the energy storage section inside the nodes at different levels is charged.And the communication network being directed to use with communication function can be：
Wired, wireless, mobile network, power line carrier network etc., and communication network is hierarchical network.
Further, each of which level node all has main supply side and main Demand-side, for example, above-mentioned two grades of nodes are followed by
Each user electrical appliance be main Demand-side, its superior node be the first nodes be then the two-level node main supply
Side.Superior node, also acts as the coordination bridge beam action to subordinate's electric network composition region simultaneously.That is, per one-level power network
Between the brother of node being related to, due to being connected in parallel on this grade of electric power networks, electric energy friendship can not be carried out between the brother of node
Change, can only be coordinated by superior node, electric energy exchange is being carried out by this grade of electric power networks.Or, directly saved by its higher level
Point is powered to it.
For example, when the first two-level node in above-mentioned needs electric energy, if the second two-level node of peer has electric energy, but
Electric energy exchange can not be directly carried out between one two-level node and the second two-level node, and needs its superior node：First nodes come
Coordinate, after the completion of the first nodes are coordinated, then second two-level node conveys electric energy to this grade of electric power networks, and described the
One two-level node then absorbs electric energy from this grade of electric power networks.
When specifically used, when first user needs electric energy, it can send request, and the first nodes can respond it is described
Request, and coordinate the two-level node of second user and/or the 3rd user and powered to two grades of electric power networks, and described first uses
Family is then to absorb electric energy from two grades of electric power networks by its first two-level node, is used its electrical equipment is supplied.
Further, in one embodiment, wherein the power transmission mode inside the network system is, Ge Jijie
Point receives the public key information that main supply side network is sent, and the public key information of oneself is broadcasted to main Demand-side.Wherein described node
The information of its main supply side network is sent to, asymmetric encryption is carried out using the public key information of main supply side.And the node
Public key is stored in its internal security module with private key information.The security module passes through smartcard smart card standard agreements
Communicated with network system.Wherein described security module has unique number, and internal private key is not associated with numbering.
When the main Demand-side of the first two-level node produces electrical energy demands, powered by the main supply side of its superior node immediately,
Now node energy storage is empty；Power request is sent to the first nodes, the first nodes coordinate to Demand-side, bring the together
Second two-level node of two users supplies specified amount electric energy by two grades of electric power networks to supply side, and first two-level node is then
The electric energy is absorbed by two grades of electric power networks, and carries out line loss compensation.Result process is brought in the coordination of the first nodes together
Demand-side network is sent to the information after public key dual signature.
Specifically, first two-level node and the second two-level node are unpacked using private key, power supply/power taking is obtained
Mode temporal information.Second two-level node is carried out double with the public key of the first nodes and the first two-level node to packet
Sign again, first two-level node is encrypted back bag letter after receiving with the first nodes and the second two-level node public key
Breath, second two-level node is powered, and first first nodes absorb electric energy.
Further, when the need for electricity of the first user being followed by when first two-level node stops, for example, first uses
The electrical appliance at family is closed；Then subsequent operation can be that first two-level node absorbs electric energy by itself energy storage device relay.
Or, need to such as close electrical energy transportation, then sent with the public key dual signature of second two-level node and the first nodes
Power request is closed, second two-level node terminates power supply after receiving.
Further, the first nodes can also monitor its main Demand-side network voltage, when it finds its main Demand-side
When network voltage is raised, then can open itself and charge, energy is absorbed and stored from main Demand-side.
Further, when there are first nodes during the two-level node does not find electric power networks, then it is closed to this level
The output function of electric power networks, and user is followed by it points out.Now, the two-level node is in off-network state, its
Charging operations are performed, and realizes peak load shifting electric energy optimizing function.
Further, in one embodiment, wherein the electricity that uses of the inner stages node that the network system is related to
Energy collection mode can be following four mode：
1st, when its DC side meets setting voltage, then the DC side energy is absorbed, and be stored in internal energy storage device；
2nd, after receiving the order matching information of main supply side, electric energy is absorbed from power network；
3rd, main Demand-side electric energy is remaining, absorbs unnecessary electric energy, stabilization line voltage；
4th, electric energy is conveyed by the way of parallel network reverse, with specified current flow, voltage output to power network.
Further, this distributed power grid system of present invention design, it is a knot that can be used with nesting all the time
Structure, may have third and fourth, five ... N grades, each level structure can be identical, simply node powers being directed to use with different levels
It is different.
For example, the composition of the distributed power grid system shown in above-mentioned Fig. 1, it can regard a basic Component units as,
It can launch multiple parallel organizations with parallel, simply build one-level electric power networks and higher level's section above the first nodes
Point, the electric energy coordinated by the superior node between each first nodes is exchanged.
Or, each user's drops down, it turns into a user power utilization region, and the lower section of each two-level node builds
Three-level node and three-class power network, the electric energy that the three-level node is followed by between the electrical appliance of child user, each three-level node are exchanged,
Coordinated by its higher level's two-level node, if needing to carry out electricity between being belonging to the user power utilization region of different two-level nodes
Can exchange, then be carried out between the three-level node and the two-level node of its higher level that can be the first user power utilization region by offer electric energy
Electric energy is exchanged, and then coordinates the electric energy exchange between two two-level nodes by first nodes again, is finally then that of obtaining the two of electric energy
Level node transmits electrical power to the attached three-level node for needing electric energy under it.
Further, the user, child user can be various use/generating equipments, and wherein user can use as generating electricity
Family, can be also used as the hybrid subscriber of both mergers as power consumption user.The hybrid subscriber, generating user, consumptive use
Family is just for the sake of the different electricity consumption situation of description.If the node that user sets its front end closes DC charging, then the use
Family just becomes simple consumption user.Each user can be in each user by configuring its local policy in network system
Converted in role.
Further, for convenience of distributed power grid system of the present invention, its inner bottom structure user, with rational
Price buys electric energy.Further embodiment of the invention, additionally providing a kind of distributed power grid system of the present invention makes
, the autonomous vending method of node electric energy, it with the pressure price for receiving is the first priority price that it is, fabric user set
Price lattice are the second priority price, and node automatically generates price for third priority price.
User's setting direct current source often spends electricity price lattice P1, is such as not provided with, then DC side of the Nodes Systems according to setting
Energy mode CF, capacity C V are estimated.Wherein evaluation method can be inquired about by inquiring about mechanism to the standard price of setting
CF mode unit capacity prices.
User sets main supply side highest energy storage check prince P2.The minimum electricity price of selling of downstream site is then by P1 and P2
Average computation is carried out, system is offered to be not less than the price to its higher level's node.The downstream site of the superior node is equal
Price data is sent to its superior node so that superior node forms price pond, and the superior node is according to these price datas
Follow-up coordination is carried out to bring together.
The lowest bid in the downstream site from the price pond of superior node carries out " buying in " request, broadcasts the information, if
Responded, then electric energy exchange can be carried out according to electric energy conversion method of the present invention.
Further, in one embodiment, the selling price of the node can be higher level's section of its main supply side
Point selling price is average with absorption energy value.
Further, in one embodiment, when higher level's node detects main Demand-side voltage reduction, and main power supply
Unnecessary electric energy is unable to supply in side, then reclaim main Demand-side subordinate node price with ceiling price to Web broadcast, if subordinate ties
Point user does not forbid responding the request, then then the downstream site is exported to main supply side inversion, completes overall grid stabilization.
Further, when actually used, distributed power grid system of the present invention, its can according to current electricity prices and
When the conventional use habit of its dependent user and current energy storage level are to determine that downstream site needs electric energy again, if by leading
Supply side is powered.For example, peak of power consumption is currently located in, and energy-storage system, close to saturation, direct current input is abundant, then the subordinate saves
The requirement of the main Demand-side of point can be that the electric energy stored by internal energy-storage system preferentially meets.
Technical scope of the invention is not limited solely to the content in described above, and those skilled in the art can not take off
On the premise of the technology of the present invention thought, many variations and modifications are carried out to above-described embodiment, and these deformations and modification all should
When being within the scope of the present invention.
Claims (15)
1. a kind of distributed power grid system；Characterized in that, it include one-level node, two grades of electric power networks, the first two-level node,
First user, the second two-level node, second user, the 3rd two-level node and the 3rd user；
The electrical equipment of wherein each user carries out electric energy exchange by respective two-level node and two grades of electric power networks,
The first nodes can be coordinated to carry out electric energy exchange by two grades of electric power networks between different two-level nodes；
When using, when first user needs electric energy, it can send request, and the first nodes can respond the request, and
The two-level node for coordinating second user and/or the 3rd user is powered to two grades of electric power networks, and the first user is then
Electric energy is absorbed from two grades of electric power networks by its first two-level node, and supplies its electrical equipment and used.
2. a kind of distributed power grid system according to claim 1；Characterized in that, wherein described node at different levels includes storage
Can, (and, off-network) inversion, DC charging, man-machine interaction, networking, at least one function in communication function.
3. a kind of distributed power grid system according to claim 2；Characterized in that, the communication of wherein described node at different levels
The communication network being directed to use with function includes at least one in wired, wireless, mobile network, power line carrier network, and
The communication network is hierarchical network.
4. a kind of distributed power grid system according to claim 1；Characterized in that, the energy storage of wherein described node at different levels
Mode includes at least one in alternating current energy storage mode and direct current energy storage mode.
5. a kind of distributed power grid system according to claim 4；Characterized in that, wherein described node all has main confession
Side and main Demand-side are answered, and the electricity collection mode that the node is used is at least one in following four mode：
1), when its DC side meets setting voltage, then node absorbs the DC side energy；
2) after, receiving the order matching information of main supply side, node absorbs electric energy from power network；
3), main Demand-side electric energy is remaining, then node absorbs unnecessary electric energy, stabilization line voltage；
4), electric energy is conveyed by the way of parallel network reverse, with specified current flow, voltage output to power network.
6. a kind of distributed power grid system according to claim 1；Characterized in that, wherein described node all has main confession
Side and main Demand-side are answered, the power transmission mode inside the network system is that nodes at different levels receive main supply side network and send
Public key information, and the public key information of oneself is broadcasted to main Demand-side；Wherein described node is sent to its main supply side network
Information, asymmetric encryption is carried out using the public key information of main supply side.
7. a kind of distributed power grid system according to claim 6；Characterized in that, the public key of wherein described node and private
In its internal security module, the security module is by smartcard smart card standards agreement and power network system for key information Store
System communication, wherein the security module has unique number, and internal private key is not associated with numbering.
8. a kind of distributed power grid system according to claim 6；Characterized in that, wherein as the master of the first two-level node
When Demand-side produces electrical energy demands, powered by the main supply side of its superior node, now node energy storage is empty；Sent out to the first nodes
Send power request；The first nodes are coordinated to Demand-side, and the second two-level node for brining second user together passes through two grades of electricity
Power network supplies specified amount electric energy to supply side, and first two-level node then absorbs the electricity by two grades of electric power networks
Can, and carry out line loss compensation；The coordination of the first nodes is brought information of the result after with public key dual signature together and is sent to
Demand-side network.
9. a kind of distributed power grid system according to claim 8；Characterized in that, wherein described first two-level node and
Second two-level node is unpacked using private key, obtains the mode temporal information of power supply/power taking；Second two-level node is with institute
Stating the public key of first nodes and the first two-level node carries out dual signature to packet, first two-level node receive after with institute
State first nodes and the second two-level node public key is encrypted back package informatin, second two-level node is powered, the described 1st
Level node absorbs electric energy.
10. a kind of distributed power grid system according to claim 9；Characterized in that, wherein when described one or two grade section
When the need for electricity of the first user that point is followed by stops, then subsequent operation is that first two-level node passes through itself energy storage device
Relay absorbs electric energy；Or, electrical energy transportation need to be such as closed, then with second two-level node and the public key of the first nodes
Dual signature sends closes power request, and second two-level node terminates power supply after receiving.
A kind of 11. distributed power grid systems according to claim 1；Characterized in that, wherein described node all has master
Supply side and main Demand-side, the first nodes can also monitor its main Demand-side line voltage, when it finds its main Demand-side electricity
When net voltage is raised, then can open itself and charge, energy is absorbed and stored from main Demand-side.
A kind of 12. distributed power grid systems according to claim 1；Characterized in that, wherein when the two-level node not
It was found that when there are first nodes in electric power networks, then closing it to this grade of output function of electric power networks, and user is followed by it
Pointed out；Now, the two-level node is in off-network state, and it only carries out charging operations.
The autonomous vending method of node electric energy that a kind of 13. distributed power grid systems suitable for described in claim 1 are used, it is special
Levy and be, it is comprised the following steps：
It is the first priority price with the pressure price for receiving, power network fabric user sets price as the second priority valency
Lattice, node automatically generates price for third priority price；
User's setting direct current source often spends electricity price lattice P1, is such as not provided with, then DC side energy mode CF according to setting, appearance
Amount CV is estimated；Wherein evaluation method is to inquire about CF mode unit capacity valencys by inquiring about mechanism to the standard price of setting
Lattice；
User sets main supply side highest energy storage check prince P2；The minimum electricity price of selling of downstream site is carried out by P1 and P2
Average computation, system is offered with being not less than the price to its higher level's node；The downstream site of the superior node is to it
Superior node sends price data so that superior node forms price pond, and the superior node is carried out according to these price datas
Follow-up coordination is brought together；
The lowest bid in the downstream site from the price pond of superior node carries out " buying in " request, broadcasts the information, if obtaining
Response, then carry out electric energy exchange.
The 14. autonomous vending methods of distributed power grid system node electric energy according to claim 13；Characterized in that, wherein
The selling price of the node can be that the superior node selling price of its main supply side is average with absorption energy value.
The 15. autonomous vending methods of distributed power grid system node electric energy according to claim 13；Characterized in that, wherein
When higher level's node detects main Demand-side voltage reduction, and main supply side is unable to supply unnecessary electric energy, then to Web broadcast
Main Demand-side subordinate node price is reclaimed with ceiling price, if subordinate node user does not forbid responding the request, then then should
Downstream site is exported to main supply side inversion, completes overall grid stabilization.
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