CN109742764A - A kind of flexibility looped network interconnect device and system - Google Patents
A kind of flexibility looped network interconnect device and system Download PDFInfo
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- CN109742764A CN109742764A CN201910117385.2A CN201910117385A CN109742764A CN 109742764 A CN109742764 A CN 109742764A CN 201910117385 A CN201910117385 A CN 201910117385A CN 109742764 A CN109742764 A CN 109742764A
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Abstract
The invention discloses a kind of flexible looped network interconnect device and systems, wherein, the flexibility looped network interconnect device, it include: multiple power grid AC ports, at least one first flexible interconnection module and at least one second flexible interconnection module, it is interconnected between first flexible interconnection module and the second flexible interconnection module, wherein, the first flexible interconnection module is connect with a power grid AC port, and the first flexible interconnection module includes at least two first DC ports and/or at least one first AC port；Second flexible interconnection module is connect with another power grid AC port, and the second flexible interconnection module includes the second DC port or the second AC port.The flexible looped network interconnect device and system provided through the invention so that between each port trend can two-way flow, power is controllable.
Description
Technical field
The present invention relates to electrical equipment technical fields, and in particular to a kind of flexibility looped network interconnect device and system.
Background technique
Power distribution network is in the end of electric system, is directly facing power consumer, carries the weight of distribution electric energy, services client
Appoint.Currently, distribution network construction lag, unreasonable structure, " closed loop design, open loop operation " make control measures limited, constrain
The flexibility of power distribution network operation control, causes the problems such as feeder load is unbalanced, the service restoration time is long.On the other hand, match
Non-linear in power grid, impact load specific gravity increase and the continuous improvement of new energy permeability, to distribution network electric energy quality
Requirements at the higher level are proposed with the safeguard mean of power supply reliability.Existing power distribution network be faced with power demand customize and diversification,
Various huge challenges such as distributed generation resource accesses scale, trend coordinated control complicates.These problems are opened using conventional
Traditional control measures such as pass are difficult to effectively be solved simultaneously.
Summary of the invention
Therefore, the present invention provides a kind of flexible looped network interconnect device and system, overcomes ordinary tap in the prior art and falls
The deficiency of the problems such as power failure caused by lock operates, cyclization impact.
In a first aspect, the embodiment of the present invention provides a kind of flexible looped network interconnect device, comprising: multiple power grid AC ports,
At least one first flexible interconnection module and at least one second flexible interconnection module, the first flexible interconnection module and second
It being interconnected between flexible interconnection module, wherein the first flexible interconnection module is connect with a power grid AC port, and described
One flexible interconnection module includes at least two first DC ports and/or at least one first AC port；Described second is flexible mutual
Gang mould block is connect with another power grid AC port, and the second flexible interconnection module includes the second DC port or the second exchange end
Mouthful.
In one embodiment, first DC port and the second DC port are for directly interconnection, or are connected to straight
Bus is flowed, or DC bus is connected to by tandem tap.
In one embodiment, the first AC port and the second AC port are for directly interconnection, or are connected to exchange mother
Line, or ac bus is connected to by tandem tap.
In one embodiment, the first flexible interconnection module is multiport blocking-up type electric power electric transformer, described more
Port blocking-up type electric power electric transformer includes: at least two first DC ports and/or at least one first AC port.
In one embodiment, the multiport electric power electric transformer is multiport blocking-up type electric power electric transformer.
In one embodiment, the second flexible interconnection module is friendship/straight inverter.
In one embodiment, the friendship/straight inverter is blocking-up type friendship/straight inverter.
Second aspect, the embodiment of the present invention provide a kind of flexible looped network interacted system, comprising: distributed generation resource, load, storage
Flexible looped network interconnect device described in energy device and first aspect, the first flexible interconnection module and the second flexible interconnection module
It is respectively connected on common bus；The distributed generation resource, load and energy storage device are connected on the common bus, and each
Power grid realizes trend interconnection.
Technical solution of the present invention has the advantages that
1, a kind of flexible looped network interconnect device provided by the invention, comprising: multiple power grid AC ports, at least one first
Flexible interconnection module and at least one second flexible interconnection module, between the first flexible interconnection module and the second flexible interconnection module
It is interconnected, wherein the first flexible interconnection module uses multiport blocking-up type electric power electric transformer, including at least two first
DC port and/or at least one first AC port；Second flexible interconnection module hands over/straight inverter using blocking-up type, including the
Two DC ports or the second AC port, wherein multiport blocking-up type electric power electric transformer is connect with a power grid AC port,
The blocking-up type hands over/straight inverter connect with another power grid AC port, by flexible looped network interconnect device, realize each port it
Between trend can two-way flow, power is controllable, at the same can pass through locking realize different port between Fault Isolation.
2. a kind of flexible looped network interacted system provided by the invention, by by the flexible interconnection in flexible looped network interconnect device
Module is interconnected or is connected to common bus, not only exchanges each end flexibility looped network interconnection, power flexible modulation, trend bidirectional flow
Dynamic, each flexible interconnection module is connected to common bus, realizes the multiple-way supply of common bus, enhances the reliable of power supply system
Property；Distributed generation resource, load etc. are accessed on common bus, realizes the digestion capability for improving distribution type renewable energy, are promoted
Power distribution network economy, reliability.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of flexible looped network one specific example of interconnect device provided in an embodiment of the present invention；
Fig. 2 is the flow chart of another specific example of flexible looped network interconnect device provided in an embodiment of the present invention；
Fig. 3 is the flow chart of another specific example of flexible looped network interconnect device provided in an embodiment of the present invention；
Fig. 4 is the flow chart of flexible looped network one specific example of interacted system provided in an embodiment of the present invention；
Fig. 5 is the flow chart of flexible looped network one specific example of interacted system provided in an embodiment of the present invention.Specific implementation
Mode
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wireless connection, be also possible to wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
The embodiment of the present invention provides a kind of flexible looped network interconnect device, as shown in Figure 1, comprising: multiple power grid AC ports
(Fig. 1 with 2 AC ports be citing, but be not limited), at least one first flexible interconnection module 11 and at least one
Second flexible interconnection module 21, is interconnected that (Fig. 1 is to wrap between the first flexible interconnection device and the second flexible interconnection device
A first flexible interconnection module 11 and second flexible interconnection module 22 are included as citing, but is not limited), described the
One flexible interconnection module 11 is connect with a power grid AC port, and the first flexible interconnection module 11 includes at least two first straight
Flow port and/or at least one first AC port；The second flexible interconnection module 21 is connect with another power grid AC port, institute
Stating the second flexible interconnection module 21 includes the second DC port or the second AC port.
In one embodiment, the first DC port and the second DC port are for directly interconnection, or are connected to direct current mother
Line, or DC bus is connected to by tandem tap, the first DC port is corresponding with the second DC port in practical application
The port of voltage class voltage characteristic.
In another embodiment, the first AC port and the second AC port are for directly interconnection, or are connected to exchange
Bus, or ac bus is connected to by tandem tap, the first AC port and the second AC port are pair in practical application
Answer the port of voltage class voltage characteristic.
Flexibility looped network interconnect device provided in an embodiment of the present invention so that between each port trend can two-way flow, from
And regulate and control the trend distribution of whole system, make the traffic control more " flexibility " of power distribution network, has both the switching of operational mode flexibility, control
The flexible feature of mode processed.
In one embodiment, which may include: that four power grid AC ports and four are soft
Property interconnection module, as shown in Fig. 2, the flexibility looped network interconnect device specifically includes: four AC ports, first flexible interconnection
Module 11 and three the second flexible interconnection modules 21, four AC ports are respectively AC port 1, AC port 2, AC port
3, AC port 4 (four AC ports middle all can be press 10KV to be not limited only as example), wherein first is soft
Property interconnection module 11 be multiport blocking-up type electric power electric transformer PET, three the second flexible interconnection modules 21 are blocking-up type
Friendship/straight inverter.The AC port B1 of first flexible interconnection module 11 is connect with AC port 1, the second flexible interconnection module 21
AC port C1 is connect with AC port 2, the AC port C3 of the second flexible interconnection module 21 is connect with AC port 3, second
The AC port C5 of flexible interconnection module 21 is connect with AC port 4, the DC port B2 of the first flexible interconnection module 11, second
21 DC port C2 of flexible interconnection module, the DC port C4 of the second flexible interconnection module 21, the second flexible interconnection module 21 are straight
Flow port C6 is connected on ± 10kV bipolarity DC bus, and the DC port B3 and 750V of the first flexible interconnection module 11 is straight
Bus connection is flowed, four power grid ports are interconnected, realizes that flexible modulation respectively holds trend, is only illustrated with this, as limit,
It can be directly connected to by feeder line for the DC port of four flexible interconnection modules in other embodiments, or be connected by switch
It is connected on DC bus.
In practical applications, AC port 1, AC port 2, AC port 3, AC port 4 can be directly or by opening
It closes and is connected from different active systems or passive system.When connecting active system, power control mode is operated in, can be adjusted
The active and reactive power of connected active system is injected, so as to adjust the power point for the not homologous ray that its AC port is connected
Match；In connected with passive system, works in voltage mode control, can power for institute's connected with passive system loading.AC port
Directly or by switch with different active systems or passive system connection, four AC ports respectively from different AC lines
Road is connected, and operates in power control mode, the active and reactive power for injecting connected active system can be adjusted, to adjust
The power distribution for the not homologous ray that its whole AC port is connected.AC port can increase current constant control function (can be by existing
The current constant control technology of technology is realized), the short circuit electricity for being no more than design value is provided after exchanging the connected system jam in end
Stream.
In one embodiment, as shown in figure 3, it is equal in the first flexible interconnection module 11 and the second flexible interconnection module 21
Including AC/DC link so that the first flexible interconnection module 11 include AC port B1, AC port B4 and DC port B2, it is straight
Flow port B3, the exchange that DC port B3 is exported are connected to the ac bus 4 of 380V by AC port B4 after being converted to exchange
On, AC port C7, AC port C8, the AC port C9 of the second flexible module 21 are connected on the ac bus 4 of 380V,
Realize trend interconnection.It is only illustrated, is not limited with this, in other embodiments, as shown in Fig. 2, in the DC bus of 750V
A DC/AC inverter is connected on 32 to be connected on the ac bus 33 of 380V, can pass through a transformation between the ac bus of 380V
Device is connect with AC port 1, realizes trend interconnection.
Flexibility looped network interconnect device provided in an embodiment of the present invention, comprising: multiple power grid AC ports, at least one first
Flexible interconnection module and at least one second flexible interconnection module, the first flexible interconnection module and a power grid AC port connect
It connects, the first flexible interconnection module includes at least two first DC ports and/or at least one first AC port；Described
Two flexible interconnection modules are connect with another power grid AC port, and the second flexible interconnection module includes the second DC port or the
Two AC ports.By the novel multimode construction of switch of the first flexible interconnection module and the second flexible interconnection module composition, make
Between each port trend can two-way flow, power is controllable, the first flexible interconnection module use multiport blocking-up type power electronics
Transformer, the second flexible interconnection module can pass through the failure between locking realization different port using blocking-up type friendship/straight inverter
Isolation.
Embodiment 2
The embodiment of the present invention also provides a kind of flexible looped network interacted system, as shown in Figures 4 and 5, comprising: distributed electrical
Flexible looped network interconnect device is (with a first flexible interconnection module 21 described in source, load, energy storage device and embodiment 1
It is citing with three the second flexible interconnection modules 22, but not limited to this), the first flexible interconnection module and the second flexible interconnection mould
Block is respectively connected on common bus；Distributed generation resource and load are connected on the common bus, realize tide with each power grid
Stream interconnection.
In practical applications, the common bus can be DC bus or ac bus, when common bus is direct current
When bus, distributed generation resource for example can be photovoltaic battery panel, and load can be electric car direct-current charging post, and energy storage device can
To be fixed energy storage device, it is also possible to mobile energy storage device, such as mobile energy storage vehicle, dress of the mobile energy storage vehicle as standby energy storage
It sets, the DC energy storage current transformer of energy storage device is bidirectional converter, and energy-storage battery group accesses direct current by DC energy storage current transformer
Bus, DC energy storage current transformer are able to carry out the DC charging or direct-current discharge of energy-storage battery group, in the tune of fixed energy storage device
Energy supply is carried out when saving scarce capacity；When common bus be ac bus when, distributed generation resource can for wind power generation plant,
It is energy accumulation device for fly wheel etc. that AC load, which can be residential electricity consumption, energy storage device, and the exchange energy accumulation current converter in energy storage device is same
Reason is also bidirectional converter, and energy accumulation device for fly wheel can be accessed on ac bus by exchange energy accumulation current converter, and exchange energy storage becomes
Stream device is able to carry out the AC charging of energy-storage battery group or stream banishes electricity, carries out in the regulating power deficiency of fixed energy storage device
Energy supply has ensured the power supply reliability of important load, improves the permeability and digestion capability of distributed generation resource, promotes distribution
Net economy, reliability.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (8)
1. a kind of flexibility looped network interconnect device characterized by comprising multiple power grid AC ports, at least one first flexibility
Interconnection module and at least one second flexible interconnection module, between the first flexible interconnection module and the second flexible interconnection module
It is interconnected, wherein the first flexible interconnection module is connect with a power grid AC port, the first flexible interconnection module packet
Include at least two first DC ports and/or at least one first AC port；The second flexible interconnection module and another power grid
AC port connection, the second flexible interconnection module include the second DC port or the second AC port.
2. flexibility looped network interconnect device according to claim 1, which is characterized in that first DC port is straight with second
Flow port is perhaps connected to DC bus or is connected to DC bus by tandem tap for directly interconnecting.
3. flexibility looped network interconnect device according to claim 1, which is characterized in that the first AC port exchanges end with second
Mouth is perhaps connected to ac bus or is connected to ac bus by tandem tap for directly interconnecting.
4. flexibility looped network interconnect device according to claim 1, which is characterized in that the first flexible interconnection module is more
Port blocking-up type electric power electric transformer, the multiport blocking-up type electric power electric transformer include: at least two first direct currents
Port and/or at least one first AC port.
5. flexibility looped network interconnect device according to claim 4, which is characterized in that the multiport electric power electric transformer
For multiport blocking-up type electric power electric transformer.
6. flexibility looped network interconnect device according to claim 3, which is characterized in that the second flexible interconnection module is
Friendship/straight inverter.
7. flexibility looped network interconnect device according to claim 6, which is characterized in that the friendship/straight inverter is blocking-up type
Friendship/straight inverter.
8. a kind of flexibility looped network interacted system characterized by comprising distributed generation resource, load, energy storage device and as right is wanted
Flexible looped network interconnect device described in any one of 1-7 is sought,
The first flexible interconnection module and the second flexible interconnection module are respectively connected on common bus；
The distributed generation resource, load and energy storage device are connected on the common bus, realize trend interconnection with each power grid.
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| CN201910117385.2A CN109742764A (en) | 2019-02-15 | 2019-02-15 | A kind of flexibility looped network interconnect device and system |
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| CN201910117385.2A CN109742764A (en) | 2019-02-15 | 2019-02-15 | A kind of flexibility looped network interconnect device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110768245A (en) * | 2019-10-23 | 2020-02-07 | 国网经济技术研究院有限公司 | Medium voltage distribution network grid structure based on multiport power electronic device |
| CN114362182A (en) * | 2021-12-28 | 2022-04-15 | 国网北京市电力公司 | Four-end flexible direct-current interconnection double-loop network power distribution system |
| CN114865634A (en) * | 2022-01-17 | 2022-08-05 | 全球能源互联网研究院有限公司 | Flexible interconnection wiring structure of alternating current power grid and control method |
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| CN207234419U (en) * | 2017-06-09 | 2018-04-13 | 上海大周信息科技有限公司 | Looped network of DC power framework based on multiport residents energy source router |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110768245A (en) * | 2019-10-23 | 2020-02-07 | 国网经济技术研究院有限公司 | Medium voltage distribution network grid structure based on multiport power electronic device |
| CN110768245B (en) * | 2019-10-23 | 2021-05-18 | 国网经济技术研究院有限公司 | Medium voltage distribution network grid structure based on multiport power electronic device |
| CN114362182A (en) * | 2021-12-28 | 2022-04-15 | 国网北京市电力公司 | Four-end flexible direct-current interconnection double-loop network power distribution system |
| CN114362182B (en) * | 2021-12-28 | 2024-04-26 | 国网北京市电力公司 | Four-terminal flexible direct-current interconnection dicyclo network distribution system |
| CN114865634A (en) * | 2022-01-17 | 2022-08-05 | 全球能源互联网研究院有限公司 | Flexible interconnection wiring structure of alternating current power grid and control method |
| CN114865634B (en) * | 2022-01-17 | 2024-05-07 | 国网智能电网研究院有限公司 | Flexible interconnection wiring structure of alternating current power grid and control method |
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