CN207010253U - A kind of chain type multiport grid connection interface device - Google Patents
A kind of chain type multiport grid connection interface device Download PDFInfo
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- CN207010253U CN207010253U CN201720814563.3U CN201720814563U CN207010253U CN 207010253 U CN207010253 U CN 207010253U CN 201720814563 U CN201720814563 U CN 201720814563U CN 207010253 U CN207010253 U CN 207010253U
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Abstract
The utility model discloses a kind of chain type multiport grid connection interface device, include a converting link, the converting link is connected by least two submodule unit series aiding connections, the chain type multiport grid connection interface device also includes at least one DC converter, at least one orthogonal converter, one end of DC converter and the DC terminal of submodule unit connect, the other end is defined as the direct current interaction port of grid connection interface device, the direct current electric connecting terminal of orthogonal converter and the DC terminal of submodule unit connect, exchange electric connecting terminal is defined as the interaction and communication port of grid connection interface device.Chain type multiport grid connection interface device of the present utility model is low-tension supply, the access of load and energy-storage units provides multiple separate ports, realizes plug and play, substantially reduces and realize difficulty and cost.
Description
Technical field
The utility model belongs to electronic power convertor field, more particularly to a kind of multiport of chain structure and network interface
Device.
Background technology
The continuous progress of distributed generation technology in recent years and Power Electronic Technique it is increasingly mature, distributed power generation exists
Application in power network is more and more extensive, and is increasingly becoming effective supplement of bulk power grid, distributed power source, load and energy storage
Device forms microgrid, and the type of numerous distributed power sources, load and energy storage device is different, includes direct current or exchange, voltage etc.
Level, capacity also differ, how by said units economy, efficiently access, it is more scabrous problem to carry out unified management.It is existing
There is the technical scheme disclosed in technology to include following several, prior art 1：Master's thesisMultiport towards energy internet is double Studied to energy router,Wang Yuting,Beijing Jiaotong UniversityIn give traditional solution.Fig. 1-7 in above-mentioned paper
The basic structure of direct-current grid is given, this is complicated, wherein in the presence of substantial amounts of DC/DC and DC/AC converters, for body
Existing direct current transportation advantage, usual dc bus be middle pressure grade, such as 35kV/10kV, and the voltage range of distributed power source is 200
~1000V, in this case, it is necessary to which the commutator transformer of high no-load voltage ratio or the AC/DC convertor of high no-load voltage ratio, cost is higher, this
The drawbacks of reliability also be present in kind mode, when dc bus breaks down or hung over the device fails on dc bus,
Equipment with bus can all be affected, it is necessary to which configuring direct current breaker is isolated to failure.Prior art 2：Master's thesisBuilding microgrid research based on cascade connection type electric power electric transformer,Huang Shuanping,Hunan UniversityIn propose another solution party
Case, Fig. 1-7 and 1-8 in above-mentioned paper describe the thinking of the solution, and Fig. 1-8 gives one and converted by high-voltage alternating
For the structure of the converter of low-voltage direct, the main advantage of the topological structure is to avoid using high voltage dc bus, is also no longer needed
The converter of substantial amounts of high no-load voltage ratio is wanted, is the equal of the converter that numerous low capacities are instead of with the converter of a Large Copacity,
But the topological structure can only provide the DC port of a low pressure, the AC port of low pressure needs by a DC/AC to become again
Parallel operation, it was found from Fig. 1-7, DC port may be constructed dc bus, and AC port forms ac bus, substantial amounts of distributed electrical
Source is connected to DC port by converter again.The major drawbacks of this structure are：(1) it is complicated：Fig. 1-8 converter
Main function is to provide dc bus port, and complexity of the converter itself is very high, and the rear class of chain structure needs substantial amounts of DC/
DC converters, converter outlet side is directly in parallel, and complexity is high in control, and the ac bus port of low pressure is by dc bus end
Mouthful inversion, energy source occupy the electricity capacity of dc bus in dc bus, and alternating current-direct current electricity consumption does not solve completely
Coupling, equally add coordinate control difficulty (2) link it is more, efficiency is low：Efficiency is the key index of power electronic equipment, Fig. 1-
There are the converters of multiple links in the structure in 8, equipment whole efficiency is low.(3) equipment dependability is low：Chain structure
Rear class need substantial amounts of DC/DC converters, converter outlet side is in parallel, is unfavorable for Fault Isolation, once low-voltage direct bus
Break down, the DC/AC inverters of all DC/DC converters of prime and rear class will be had influence on.
The essential defect of prior art is that port is single, and compatible each different types of unit is removed using single-port
Cause complexity high, cost performance is low；There is dc bus in such scheme, failure is difficult to isolate, and reliability is low.
Utility model content
The utility model aims to solve the problem that the deficiency of such scheme, is carried for the access of low-tension supply, load and energy-storage units
For multiple separate ports, make the access High-voltage AC Network of the unit high reliability of each low pressure, realize plug and play,
Substantially reduce and realize difficulty and cost.
In order to achieve the above object, the utility model provides a kind of chain type multiport grid connection interface device, specific as follows：
A kind of chain type multiport grid connection interface device, comprising a converting link, the converting link is by being serially connected at least
Two submodule units are formed, and the submodule unit includes power conversion unit and electric capacity, and positive pole, the negative pole of electric capacity draw
Go out, be defined as the DC terminal of submodule unit, one end and the electric capacity of power conversion unit are connected in parallel, and the other end is defined as submodule
The exchange end of module unit, the exchange end head and the tail of each submodule are sequentially connected with, and the chain type multiport grid connection interface device is also wrapped
Include at least one DC converter, at least one straight-AC-AC converter, the DC converter can be by a kind of DC power conversion into another
A kind of direct current with different output characteristics, one end of DC converter and the DC terminal of submodule unit connect, the other end
The direct current interaction port of grid connection interface device is defined as, the straight-AC-AC converter can be straight-to hand over by DC power conversion into alternating current
The direct current electric connecting terminal of converter and the DC terminal of submodule unit connect, and exchange electric connecting terminal is defined as grid connection interface device
Interaction and communication port.
The interface arrangement comprise at least a submodule unit DC terminal be not connected with directly-AC-AC converter, also not with
DC converter connects, and above-mentioned idle DC terminal is defined as standby port.
The interface arrangement includes at least two direct currents interaction port and at least two interaction and communication ports.
The interface arrangement includes at least two interaction and communication ports, and the interaction and communication port connects with multiwinding transformer
Connect, every group of primary side of multiwinding transformer is connected with an interaction and communication port, and the secondary of multiwinding transformer is defined as
AC port is pressed in one.
The interface arrangement includes at least two interaction and communication ports, and the interaction and communication port is connected in series, the string
Port definition after connection connection presses AC port in being second.
The interface arrangement includes at least two direct currents interaction port, and the direct current interaction port is connected in series, is defined as
Middle straightening flow port.
The output voltage amplitude and phase of interaction and communication port in the interface arrangement can be independent regulation, direct current interaction
The output voltage amplitude of port can be independent regulation.
The submodule unit is the H bridge power model units being made up of 4 groups of full-control type power semiconductors.
The submodule unit is the half-bridge power module unit being made up of 2 groups of full-control type power semiconductors.
The interface arrangement also includes at least one by-pass switch, and the by-pass switch exchanges end with submodule unit simultaneously
Connection.
The interface arrangement also includes at least one dc switch, and the dc switch is connected on submodule unit and direct current
Between converter or straight-AC-AC converter.
The utility model also includes a kind of system of the chain type multiport grid connection interface device, and the system includes chain type
Multiport grid connection interface device and dc source, AC power, energy-storage units, DC load, five kinds of low pressure lists of AC load
Member, the interaction and communication port and direct current interaction port that the interface arrangement includes at least are connected with above two low voltage unit, structure
Into the system of chain type multiport grid connection interface device, wherein dc source, energy-storage units, DC load interacts port company with direct current
Connect, AC power and AC load are connected with interaction and communication port.
The utility model also includes a kind of transverter containing the chain type multiport grid connection interface device, the transverter
Including three-phase, each phase includes upper and lower two bridge arms, and each bridge arm includes connect company of the reactor with the interface arrangement
Connect, upper and lower two bridge arms are together into a facies unit, and the tie point of upper and lower two bridge arms is midpoint, and three are gone up bridge arm
Exit links together, and is the transverter anode；The exit of three lower bridge arms links together, and is the transverter
Negative terminal, the midpoint of the three-phase bridge arm of the transverter are connected with power network, and the anode of transverter and the positive pole of DC power transmission line connect
Connect, the negative terminal of transverter and the negative pole of DC power transmission line connect.
The utility model also includes a kind of transverter containing the chain type multiport grid connection interface device, the transverter
Including three facies units, each facies unit includes being connected in series for an interface arrangement and reactor, and the one of three facies units
End is connected, and forms star-like connection, the other end three corresponding connections with grid side respectively of three facies units.
The utility model also includes a kind of transverter containing the chain type multiport grid connection interface device, the transverter
Including three unit phases, each facies unit includes being connected in series for an interface arrangement and reactor, the head of three facies units
Tail is connected with each other, and forms angle-style connection, three tie points, the three corresponding connections with grid side respectively of head and the tail connection.
The beneficial effects of the utility model are：
(1) DC side of converting link Neutron module unit is drawn, as low voltage energy crosspoint and network interface, energy
Measure the DC voltage value of crosspoint and the DC voltage value of submodule unit matches, realize low-voltage direct access, the change of current
The AC of chain Neutron module unit realizes High voltage output by way of cascade, and low-voltage direct height is realized using which
No-load voltage ratio boosting incoming transport power network, eliminate the commutator transformer of high no-load voltage ratio.
(2) transverter of chain type is may be constructed using grid connection interface device, such as SVC or based on modularization
The transverter of more level, grid connection interface device mesolow unit can realize that active power interacts between power network, meanwhile, transverter
Or SVC can also carry out reactive-load compensation, realize the uneoupled control of active power and reactive power, make equipment
Utilization rate maximizes.
(3) the direct current interactive interface in access grid-connected interface arrangement and interaction and communication interface can be multiple power supplys, it is negative
Lotus and energy-storage units, each access unit for same converting link can be different, and configuring can be less equal than in quantity
Submodule unit, in configuration more flexibly, each unit independent control, realize plug and play.
(4) (energy-storage units, AC power, dc source, AC load, the direct current of each element in DC distribution net
Load) it can be accessed by the DC converter in grid connection interface device and straight-AC-AC converter, utilize grid connection interface device
Constitute complete micro-grid system.And centralized system is used, it is easy to implement the management and realization of the control function to whole microgrid.
(5) accessed by submodule unit, the dc bus of each submodule unit is separate, with common bus mode
Compare, this mode is advantageously implemented the isolation of failure, and reliability is higher.
(6) redundancy is easy to implement, traditional scheme passes through parallel way increase-volume, it is difficult to redundancy is realized, once single module failure,
Whole system will move out operation, and the utility model configures by-pass switch in submodule unit, when submodule unit failure, can incite somebody to action
Failure bypass, corresponding dc switch can be separated in DC converter or straight-AC-AC converter failure, can be rapid by switching
Fault coverage is reduced.
(7) DC converter in grid connection interface device and straight-AC-AC converter can with submodule unit integrated design,
Engineering realizability is good, saves space.
(8) without independently taking energy.DC converter and power semiconductor in straight-AC-AC converter and its control back
Road needs appropriate power supply power supply, can be shared with submodule unit and take energy loop.
(9) DC converter and straight-AC-AC converter can not have to configure independent cooling device, be shared with submodule unit
Cooling device.
Brief description of the drawings
Fig. 1 is the utility model chain type multiport grid connection interface device topology schematic diagram；
Fig. 2 is the topological diagram of the utility model chain type multiport grid connection interface device Neutron module unit；
Fig. 3 is a kind of embodiment of DC/DC converting means in the utility model chain type multiport grid connection interface device；
Fig. 4 is a kind of embodiment of DC/AC converting means in the utility model chain type multiport grid connection interface device；
Fig. 5 is the first embodiment of the utility model transverter；
Fig. 6 is the second embodiment of the utility model transverter；
Fig. 7 is the 3rd embodiment of the utility model transverter；
Fig. 8 is the embodiment of 1 time prior art of application scenarios；
Fig. 9 is embodiment of the present utility model under application scenarios 1；
Figure 10 is embodiment of the present utility model under application scenarios 2；
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model is described in detail.
As shown in Figure 1：A kind of chain type multiport grid connection interface device, comprising a converting link, the converting link is by mutual
At least two submodule units of series connection are formed, and the submodule unit includes power conversion unit and electric capacity, and electric capacity is just
Pole, negative pole are drawn, and are defined as the DC terminal of submodule unit, and one end and the electric capacity of power conversion unit are connected in parallel, the other end
The exchange end of submodule unit is defined as, the exchange end head and the tail of each submodule are sequentially connected with, and the chain type multiport is grid-connected to be connect
Mouth device also includes at least one DC converter, at least one straight-AC-AC converter, and the DC converter can be by a kind of direct current
Electricity is transformed into another direct current with different output characteristics, and one end of DC converter and the DC terminal of submodule unit connect
Connect, the other end is defined as the direct current interaction port of grid connection interface device, and described straight-AC-AC converter can be by DC power conversion into exchange
Electricity, the direct current electric connecting terminal of straight-AC-AC converter and the DC terminal of submodule unit connect, and exchange electric connecting terminal is defined as grid-connected connect
The interaction and communication port of mouth device.
The present embodiment includes two direct currents and interacts port, includes two interaction and communication ports.The topology knot of DC converter
Structure is as shown in figure 3, the topological structure of straight-AC-AC converter is as shown in Figure 4.
The interface arrangement comprise at least a submodule unit DC terminal be not connected with directly-AC-AC converter, also not with
DC converter connects, and above-mentioned idle DC terminal is defined as standby port.
As shown in figure 1, this implementation includes a standby port.
As a kind of preferred scheme, interface arrangement includes at least two direct currents interaction port and at least two interaction and communications
Port.
Interface arrangement includes at least two interaction and communication ports, and the interaction and communication port is connected with multiwinding transformer,
Every group of primary side of multiwinding transformer is connected with an interaction and communication port, and the secondary of multiwinding transformer is defined as in first
Press AC port.
The interface arrangement includes at least two interaction and communication ports, and the interaction and communication port is connected in series, the string
Port definition after connection connection presses AC port in being second.
The interface arrangement includes at least two direct currents interaction port, and the direct current interaction port is connected in series, is defined as
Middle straightening flow port.
The output voltage amplitude and phase of interaction and communication port in the interface arrangement can be independent regulation, direct current interaction
The output voltage amplitude of port can be independent regulation.
The submodule unit is the H bridge power model units being made up of 4 groups of full-control type power semiconductors.Such as Fig. 2
(a) shown in.
The submodule unit is the half-bridge power module unit being made up of 2 groups of full-control type power semiconductors.Such as Fig. 2
(b) shown in.
As a kind of preferred scheme, the interface arrangement also includes at least one by-pass switch, the by-pass switch and son
Modular unit exchange end is in parallel.
As a kind of preferred scheme, the interface arrangement also includes at least one dc switch, the dc switch series connection
Between submodule unit and DC converter or straight-AC-AC converter.
The utility model also includes a kind of system of the chain type multiport grid connection interface device, and the system includes chain type
Multiport grid connection interface device and dc source, AC power, energy-storage units, DC load, five kinds of low pressure lists of AC load
Member, the interaction and communication port and direct current interaction port that the interface arrangement includes at least are connected with above two low voltage unit, structure
Into the system of chain type multiport grid connection interface device, wherein dc source, energy-storage units, DC load interacts port company with direct current
Connect, AC power and AC load are connected with interaction and communication port.
The utility model also includes a kind of transverter containing the chain type multiport grid connection interface device, as shown in figure 5,
The transverter includes three-phase, and each phase includes upper and lower two bridge arms, and each bridge arm includes a reactor and filled with the interface
That puts is connected in series, and for upper and lower two bridge arms together into a facies unit, the tie points of upper and lower two bridge arms is midpoint, and three
The exit of individual upper bridge arm links together, and is the transverter anode；The exit of three lower bridge arms links together, for institute
The negative terminal of transverter is stated, the midpoint of the three-phase bridge arm of the transverter is connected with power network, the anode and DC transmission line of transverter
The positive pole connection on road, the negative terminal of transverter and the negative pole of DC power transmission line connect.
The utility model also includes a kind of transverter containing the chain type multiport grid connection interface device, as shown in fig. 6,
The transverter includes three facies units, and each facies unit includes being connected in series for an interface arrangement and reactor, three
One end of facies unit is connected, and forms star-like connection, the other end three corresponding connections with grid side respectively of three facies units.
The utility model also includes a kind of transverter containing the chain type multiport grid connection interface device, as shown in fig. 7,
The transverter includes three unit phases, and each facies unit includes being connected in series for an interface arrangement and reactor, three
The head and the tail of facies unit are connected with each other, and form angle-style connection, and three tie points of head and the tail connection are corresponding with the three of grid side respectively
Connection.
The utility model can be applicable to direct current network, alternating current-direct current mixing distribution, microgrid etc. needs low voltage unit being linked into
The application scenario of mesohigh power network, middle pressure AC load is can be also used for, such as middle voltage electromotor application of frequency converter occasion.
Illustrated with the application scenarios of the micro-grid system on following island and middle voltage electromotor frequency converter of the present utility model
Specific embodiment：
Scene 1：Micro-grid system on island, include following demand：
(1) pressure transmission of electricity in：Electric energy on island is sent out by 10kV with form of communication
(2) voltage source is handed over：Comprising 3 groups of (300kW) wind power generation units, export as AC three-phase 690V
(3) dc source：Including 2 groups of (500kW) photovoltaic generation power supplys, export as direct current 600V
(4) energy-storage units：1 group of energy-storage units (800kW) being made up of sodium-sulphur battery, is exported as direct current 700V
(5) AC load：Include 2 groups of AC loads, for being powered in island, 1 group of single-phase 220V AC load
(200kW), 1 group of three-phase 380V AC load (300kW)
Typically comprising transverter needs 3 chain type multiport grid-connecting apparatus, each to form 1 phase, forms ABC three-phases, this
Scape for simplifying the analysis, only lists the situation of 1 phase.
Such as solve the problems, such as application scenarios using scheme of the prior art, as shown in figure 8, total capacity reaches 3200kW,
High side voltage is 10kV, and comprising 10 submodule units, each submodule unit configures DC/DC units, and DC/DC units are set
Meter capacity is 320kW, DC/DC unit output-parallels, there is provided 1100V dc bus, the total capacity of dc bus
3200kW, made because power demand includes a variety of electricity, therefore the dc bus based on 1100V, it is also necessary to multiple DC/DC units with
DC/AC units match to the power supply and load of different electricity systems, and general structure is complicated, under the scene, needs 13 DC/ altogether
DC converters, 5 DC/AC converters.
Solve the problems, such as application scenarios using the utility model, as shown in figure 9, converting link is by being serially connected in the present embodiment
10 submodule units form, the exchange end head and the tail of 10 submodules are sequentially connected with, and are connected to 10kV ac high-voltages side, for
The present embodiment, altogether comprising 5 groups of DC/AC converters, 4 groups of DC/DC converters, there is provided 5 independent interaction and communication ports, 4 solely
Vertical direct current interaction port.Interaction and communication port, which connects, includes 3 groups of (300kW) wind power generation units, 1 group of single-phase load, 1 group three
Phase load；Direct current interaction port connects 2 groups of photovoltaic generation units, 1 group of energy storage energy-storage units.
Using the utility model, it is not necessary to consider total capacity, each submodule unit and DC/DC or DC/AC conversion
The capacity of device is more than or equal to the capacity needed for port, and the Capacity design of generally each submodule is identical, in favor of engineering
Change and design and produce, for this scene, the cell capability accessed required for most of is not more than 500kW, for energy-storage units, holds
Measure as 800kW, can be by the way of two units to be in parallel, configuration is very flexible, is easy to Engineering Design.Each DC/DC or
DC/AC converters are independent controls, and port voltage can adjust, and pass through each convertor controls strategy and control targe
Adjustment realizes the adaptive of different electricity units access in working range.Also have the advantage that compared with prior art：
(1) compared with the scheme of prior art, this programme needs 3 DC/DC converters, 5 DC/AC converters, cost
Substantially reduce.
(2) 1 power conversion link is reduced, prior art includes two by the unit of submodule unit to access
The link of power conversion, and the utility model only needs 1 power conversion link, has significant advantage in efficiency.
(3) low-voltage direct bus in prior art be present, the secondary of 10 DC/DC converters of the bus and prime
Connection, is connected with the primary side of rear class DC/DC converters, DC/AC converters, once dc bus breaks down, and all 13
Power inverter can be affected, and cause the wholly off operation of equipment, after single power inverter breaks down, also it is more difficult from
Excision completely in bus bar side to each power inverter, it is necessary to set dc switch in system；Cost and cost are larger.This practicality
New that common bus is not present, unit is relatively independent, can be by way of bypass from being when submodule breaks down
Cut off in system, affected is only 1 unit, when power inverter breaks down, can separate corresponding dc switch,
Dc switch is apolegamy, if do not configured dc switch, can also be cut off trouble unit by by-pass switch, can reduce event rapidly
Hinder scope.The utility model has significant advantage compared with the scheme of prior art in reliability.
(4) the utility model easily dilatation compared with the scheme of prior art, under the application scenarios, it is assumed that have again new
Photovoltaic generation unit needs access system, and the addition of new unit causes the total capacity of equipment to increase, 10 DC/DC conversion of prime
The capacity summation of device is difficult now to carry out increase-volume again, while increase the appearance of 10 DC/DC converters beyond original scope of design
Amount cost is very big, and increasing the submodule unit of converting link needs largely to change original system structure.And this practicality is new
Standby port is left in the device of type, it is thus only necessary to increases by 1 DC/DC converter for standby port, you can the new light of access
Lie prostrate generator unit.Usual 1 transverter has 3 converting links of ABC three-phases, therefore has a fairly large number of standby port, reserves
Stating standby port does not increase any cost, and utilization rate of equipment and installations is unaffected, and for the scheme of prior art, if reserved hold
Amount adds extra cost, it is necessary to improve the capacity of 10 DC/DC converters.
Scene 2：Middle voltage electromotor frequency converter
As shown in Figure 10, the utility model can connect the primary side of multiwinding transformer by interaction and communication port,
In the present embodiment, the present embodiment includes 10 submodule units, includes 6 groups of DC/AC converters, it is possible to provide 6 interaction and communications
Port, multiwinding transformer include 6 primary sides, connected one to one with 6 interaction and communication ports, the secondary of multiwinding transformer
6kV middle pressure alternating current generator is connected, by controlling the dutycycle for the DC/AC inverters being connected with submodule, can control output to hand over
Frequency is flowed, rotating speed or the torque of alternating current generator load are pressed in regulation.This implementation also includes 4 standby ports, for increase-volume or
Access other types power supply or load.
Above example is only to illustrate technological thought of the present utility model, it is impossible to limits protection model of the present utility model with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical scheme, each fall within this reality
Within the scope of novel protected.
Claims (15)
1. a kind of chain type multiport grid connection interface device, comprising a converting link, the converting link by be serially connected at least two
Individual submodule unit is formed, and the submodule unit includes power conversion unit and electric capacity, and positive pole, the negative pole of electric capacity are drawn,
The DC terminal of submodule unit is defined as, one end and the electric capacity of power conversion unit are connected in parallel, and the other end is defined as submodule
The exchange end of unit, the exchange end head and the tail of each submodule are sequentially connected with, it is characterised in that the chain type multiport and network interface
Device also includes at least one DC converter, at least one straight-AC-AC converter, and the DC converter is realized a kind of direct current
Electricity is transformed into another direct current with different output characteristics, and one end of DC converter and the DC terminal of submodule unit connect
Connect, the other end is defined as the direct current interaction port of grid connection interface device, and the straight-AC-AC converter, which is realized, strikes a bargain DC power conversion
Stream electricity, the direct current electric connecting terminal of straight-AC-AC converter and the DC terminal of submodule unit connect, and exchange electric connecting terminal is defined as grid-connected
The interaction and communication port of interface arrangement.
2. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement comprises at least
One idle DC terminal, above-mentioned DC terminal are not connected with directly-AC-AC converter, are not also connected with DC converter, are defined as standby
Use port.
3. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement includes at least
Two direct current interaction ports and at least two interaction and communication ports.
4. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement includes at least
Two interaction and communication ports, the interaction and communication port are connected with multiwinding transformer, and every group of primary side of multiwinding transformer is equal
It is connected with an interaction and communication port, the secondary of multiwinding transformer presses AC port in being defined as first.
5. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement includes at least
Two interaction and communication ports, the interaction and communication port are connected in series, it is described be connected in series after port definition be second in press
AC port.
6. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement includes at least
Two direct currents interact port, and the direct current interaction port is connected in series, and is defined as middle straightening flow port.
7. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the exchange in the interface arrangement
Interaction port output voltage amplitude and phase can be independent regulation, direct current interaction port output voltage amplitude can be independent tune
Section.
8. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the submodule unit is by 4
The H bridge power model units that group full-control type power semiconductor is formed.
9. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the submodule unit is by 2
The half-bridge power module unit that group full-control type power semiconductor is formed.
10. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement also includes
At least one by-pass switch, the by-pass switch exchange end parallel connection with submodule unit.
11. chain type multiport grid connection interface device as claimed in claim 1, it is characterised in that the interface arrangement also includes
At least one dc switch, the dc switch are connected between submodule unit and DC converter or straight-AC-AC converter.
12. the system of chain type multiport grid connection interface device described in any one, its feature in a kind of 1-11 containing claim
It is, the system includes chain type multiport grid connection interface device and coupled low voltage unit, the low voltage unit
Species include dc source, AC power, energy-storage units, DC load or AC load, wherein, it is straight in interface arrangement
Stream interaction port is connected with dc source, energy-storage units or DC load, and the interaction and communication port in interface arrangement is with handing over
Stream power supply or AC load are connected.
13. the transverter of chain type multiport grid connection interface device described in any one in a kind of 1-11 containing claim, it is special
Sign is, the transverter includes three-phase, and each phase includes upper and lower two bridge arms, each bridge arm include a reactor with it is described
Interface arrangement is connected in series, and upper and lower two bridge arms are combined one facies unit of composition, and the tie point of upper and lower two bridge arms is
Midpoint, the exit of three upper bridge arms links together, as the transverter anode；The exit of three lower bridge arms is connected to
Together, the negative terminal as the transverter, the midpoint of the three-phase bridge arm of the transverter are connected with power network, the anode of transverter with
The positive pole connection of DC power transmission line, the negative terminal of transverter and the negative pole of DC power transmission line connect.
14. the transverter of chain type multiport grid connection interface device described in any one in a kind of 1-11 containing claim, it is special
Sign is that the transverter includes three facies units, and each facies unit includes connect company of the interface arrangement with reactor
Connect, one end of three facies units is connected, and forms star-like connection, and the other end of three facies units is corresponding with the three of grid side respectively
Connection.
15. the transverter of chain type multiport grid connection interface device described in any one in a kind of 1-11 containing claim, it is special
Sign is that the transverter includes three unit phases, and each facies unit includes connect company of the interface arrangement with reactor
Connect, the head and the tail of three facies units are connected with each other, and form angle-style connection, three tie points of head and the tail connection respectively with grid side three
Corresponding connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720814563.3U CN207010253U (en) | 2017-07-06 | 2017-07-06 | A kind of chain type multiport grid connection interface device |
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| CN107276125A (en) * | 2017-07-06 | 2017-10-20 | 南京南瑞继保电气有限公司 | A kind of chain type multiport grid connection interface device and control method |
| CN108667074A (en) * | 2018-06-01 | 2018-10-16 | 广东工业大学 | A kind of variable frequency transformer fault passes through the multiport converter and circuit of circuit |
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| CN107276125A (en) * | 2017-07-06 | 2017-10-20 | 南京南瑞继保电气有限公司 | A kind of chain type multiport grid connection interface device and control method |
| WO2019007135A1 (en) * | 2017-07-06 | 2019-01-10 | 南京南瑞继保电气有限公司 | Chained multi-port grid-connected interface apparatus and control method |
| CN107276125B (en) * | 2017-07-06 | 2023-06-27 | 南京南瑞继保电气有限公司 | Chained multi-port grid-connected interface device and control method |
| CN110445147A (en) * | 2018-05-04 | 2019-11-12 | 南京南瑞继保电气有限公司 | A kind of new energy plant stand voltage power-less coordinating and optimizing control method |
| CN108667074A (en) * | 2018-06-01 | 2018-10-16 | 广东工业大学 | A kind of variable frequency transformer fault passes through the multiport converter and circuit of circuit |
| CN111756232A (en) * | 2019-03-27 | 2020-10-09 | 台达电子企业管理（上海）有限公司 | Power unit |
| US11217993B2 (en) | 2019-03-27 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Conversion system with high voltage side and low voltage side |
| US11394292B2 (en) | 2019-03-27 | 2022-07-19 | Delta Electronics (Shanghai) Co., Ltd | Power unit |
| CN111756232B (en) * | 2019-03-27 | 2022-10-18 | 台达电子企业管理（上海）有限公司 | Power unit |
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