CN109950923A - AC-AC converter device, the connection method of power grid and device - Google Patents
AC-AC converter device, the connection method of power grid and device Download PDFInfo
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- CN109950923A CN109950923A CN201910234268.4A CN201910234268A CN109950923A CN 109950923 A CN109950923 A CN 109950923A CN 201910234268 A CN201910234268 A CN 201910234268A CN 109950923 A CN109950923 A CN 109950923A
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Abstract
The present invention provides a kind of AC-AC converter device, the connection method of power grid and devices, Communication-Communication AC-AC converting means uses the topological structure based on solid transformer type, topological structure based on solid transformer type includes: input stage AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein, the input terminal of input stage AC-DC end AC-DC is quoted from the first power grid, and the output end of output stage DC-AC end DC-AC is quoted from the second power grid；It is attached between input stage AC-DC end AC-DC and output stage DC-AC end DC-AC using alternating expression double star connecting mode.Through the invention, it solves the problems, such as that the working efficiency of AC-AC converter device in the related technology is lower, and then has achieved the effect that the working efficiency for improving AC-AC converter device.
Description
Technical field
The present invention relates to power domains, in particular to the connection method of a kind of AC-AC converter device, power grid
And device.
Background technique
LCC-LCC, VCS-LCC or VCS-VCS topological structure that back-to-back type converting means uses at present are all made of double straight
The bus way of output is flowed, single DC bus capacity is larger.And solid transformer type topological structure is uneven when side threephase load
The other side, which is unable to self-balancing, when weighing apparatus will also occur off-center operation, can not achieve good Fault Isolation, and due to having had more DC-
The DC grades of quantity for increasing equipment, cause the decline of whole work efficiency and the decline of risk point and reliability, improve simultaneously
Construction cost.
For above-mentioned problem, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of AC-AC converter device, the connection method of power grid and devices, at least to solve
The certainly lower problem of the working efficiency of AC-AC converter device in the related technology.
According to one embodiment of present invention, a kind of AC-AC converter device, the Communication-Communication AC-AC are provided
Converting means uses the topological structure based on solid transformer type, and the topological structure based on solid transformer type includes: defeated
Enter grade AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein
The input terminal of input stage AC-DC end AC-DC is quoted from the first power grid, output stage DC-AC end
The output end of DC-AC is quoted from the second power grid；
Alternating expression is used between input stage AC-DC end AC-DC and output stage DC-AC end DC-AC
Double star connecting mode is attached.
Optionally, the topological structure based on solid transformer type includes: Mj module, wherein j be more than or equal to 1 and
Natural number less than or equal to 9 includes input stage AC-DC end AC-DC and output stage direct current-in each Mj module
Exchange end DC-AC；The input terminal that first power grid is drawn includes end A, end B and end C three-phase, and second power grid is drawn defeated
Entering end includes end a, end b and end c three-phase；
The alternating expression double star connecting mode includes: the first output end and DC- of the AC-DC in each Mj module
The first input end of AC connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect
It connects；
The first input end of AC-DC in M1 module is quoted from A is held, and the first output end of the DC-AC in M1 module is quoted from end
The first input end of AC-DC in a, M4 module is quoted from B is held, and the first output end of the DC-AC in M2 module is quoted from end b, M7 mould
The first input end of AC-DC in block is quoted from C is held, and the first output end of the DC-AC in M3 module is quoted from end c；
The second input terminal of AC-DC in M1 module is connect with the first input end of the AC-DC in M2 module, in M2 module
The second input terminal of AC-DC connect with the first input end of the AC-DC in M3 module, second of the AC-DC in M3 module is defeated
Enter end to connect with the second input terminal of the AC-DC in the second input terminal and M9 module of the AC-DC in M6 module, in M4 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M5 module, the second input of the AC-DC in M5 module
End is connect with the first input end of the AC-DC in M6 module, in the second input terminal and M8 module of the AC-DC in M7 module
The first input end of AC-DC connects, the first input of the second input terminal and the AC-DC in M9 module of the AC-DC in M8 module
End connection；
The second output terminal of DC-AC in M1 module is connect with the first output end of the DC-AC in M4 module, in M2 module
The second output terminal of DC-AC connect with the first output end of the DC-AC in M5 module, second of the DC-AC in M3 module is defeated
Outlet is connect with the first output end of the DC-AC in M6 module, in the second output terminal and M7 module of the DC-AC in M4 module
The first output end of DC-AC connects, the second output terminal of the DC-AC in M5 module and the first output of the DC-AC in M8 module
End connects, and the second output terminal of the DC-AC in M6 module is connect with the first output end of the DC-AC in M9 module, in M7 module
DC-AC second output terminal and M8 module in DC-AC second output terminal and the DC-AC in M9 module second output terminal
Connection.
According to another embodiment of the invention, a kind of connection method of power grid is provided, comprising:
Obtain the first power grid, the second power grid and AC-AC converter device, wherein the Communication-Communication AC-AC transformation
Device uses the topological structure based on solid transformer type, and the topological structure based on solid transformer type includes: input stage
AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end AC-DC and institute
It states and is attached between output stage DC-AC end DC-AC using alternating expression double star connecting mode；
The AC-AC converter device is connected between first power grid and second power grid, wherein described
For the input terminal of input stage AC-DC end AC-DC quoted from first power grid, output stage DC-AC end DC-AC's is defeated
Outlet is quoted from second power grid.
Optionally, the AC-AC converter device is connected between first power grid and second power grid and is wrapped
It includes:
Drawing from first power grid includes end A, end B and the input terminal for holding C three-phase, and is drawn from high second power grid
Including end a, end b and the input terminal for holding c three-phase；
The AC-AC converter device is connected to using the alternating expression double star connecting mode including end A, end B
And it holds between the input terminal of C three-phase and the input terminal including end a, end b and end c three-phase.
Optionally, the topological structure based on solid transformer type includes: Mj module, wherein j be more than or equal to 1 and
Natural number less than or equal to 9 includes input stage AC-DC end AC-DC and output stage direct current-in each Mj module
Exchange end DC-AC；
The alternating expression double star connecting mode includes: the first output end and DC- of the AC-DC in each Mj module
The first input end of AC connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect
It connects；
The first input end of AC-DC in M1 module is quoted from A is held, and the first output end of the DC-AC in M1 module is quoted from end
The first input end of AC-DC in a, M4 module is quoted from B is held, and the first output end of the DC-AC in M2 module is quoted from end b, M7 mould
The first input end of AC-DC in block is quoted from C is held, and the first output end of the DC-AC in M3 module is quoted from end c；
The second input terminal of AC-DC in M1 module is connect with the first input end of the AC-DC in M2 module, in M2 module
The second input terminal of AC-DC connect with the first input end of the AC-DC in M3 module, second of the AC-DC in M3 module is defeated
Enter end to connect with the second input terminal of the AC-DC in the second input terminal and M9 module of the AC-DC in M6 module, in M4 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M5 module, the second input of the AC-DC in M5 module
End is connect with the first input end of the AC-DC in M6 module, in the second input terminal and M8 module of the AC-DC in M7 module
The first input end of AC-DC connects, the first input of the second input terminal and the AC-DC in M9 module of the AC-DC in M8 module
End connection；
The second output terminal of DC-AC in M1 module is connect with the first output end of the DC-AC in M4 module, in M2 module
The second output terminal of DC-AC connect with the first output end of the DC-AC in M5 module, second of the DC-AC in M3 module is defeated
Outlet is connect with the first output end of the DC-AC in M6 module, in the second output terminal and M7 module of the DC-AC in M4 module
The first output end of DC-AC connects, the second output terminal of the DC-AC in M5 module and the first output of the DC-AC in M8 module
End connects, and the second output terminal of the DC-AC in M6 module is connect with the first output end of the DC-AC in M9 module, in M7 module
DC-AC second output terminal and M8 module in DC-AC second output terminal and the DC-AC in M9 module second output terminal
Connection.
Optionally, it is connected between first power grid and second power grid by the AC-AC converter device
Later, the method also includes:
Target input occurs in detecting end A, end B and the input terminal for holding C three-phase included by first power grid
In the case where no-voltage failure, the module that the target input is connected in the AC-AC converter device is isolated.
Optionally, include: by the module isolation that the target input is connected in the AC-AC converter device
The module that the target input is connected in the AC-AC converter device is adjusted to short-circuit condition.
According to another embodiment of the invention, the attachment device of power grid is provided characterized by comprising
Module is obtained, for obtaining the first power grid, the second power grid and AC-AC converter device, wherein the exchange-
It exchanges AC-AC converting means and uses the topological structure based on solid transformer type, the topology knot based on solid transformer type
Structure includes: input stage AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein the input stage exchange-is straight
It is attached between stream end AC-DC and output stage DC-AC end DC-AC using alternating expression double star connecting mode；
Link block, for the AC-AC converter device to be connected to first power grid and second power grid
Between, wherein the input terminal of input stage AC-DC end AC-DC is quoted from first power grid, the output stage direct current-
The output end of end DC-AC is exchanged quoted from second power grid.
According to still another embodiment of the invention, a kind of storage medium is additionally provided, meter is stored in the storage medium
Calculation machine program, wherein the computer program is arranged to execute the step in any of the above-described embodiment of the method when operation.
According to still another embodiment of the invention, a kind of electronic device, including memory and processor are additionally provided, it is described
Computer program is stored in memory, the processor is arranged to run the computer program to execute any of the above-described
Step in embodiment of the method.
Through the invention, Communication-Communication AC-AC converting means uses the topological structure based on solid transformer type, is based on
The topological structure of solid transformer type includes: input stage AC-DC end AC-DC and output stage DC-AC end DC-AC,
In, the input terminal of input stage AC-DC end AC-DC is quoted from the first power grid, the output end of output stage DC-AC end DC-AC
Quoted from the second power grid；Alternating expression double star is used between input stage AC-DC end AC-DC and output stage DC-AC end DC-AC
Property connecting mode is attached.Due to cancelling intermediate DC-DC grades, reduce making for intermediate link and a large amount of power electronic devices
With, therefore reduce control difficulty and device loss, reduce construction cost；Double star alternating expression connection type can realize first
When individual event open-phase fault or three-phase imbalance operation occur for power grid or the second power grid any end power grid, converter station can be by failure
The failure at end is converted into converter station internal fault by converter station, eliminates event by the isolation or control of converter station internal module
Barrier.Therefore, it can solve the lower problem of the working efficiency of AC-AC converter device in the related technology, reach raising exchange-
The effect of the working efficiency of AC converter.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the soft straight converter station of back-to-back type MMC of the relevant technologies；
Fig. 2 is the schematic diagram according to the solid transformer type topological structure of the relevant technologies；
Fig. 3 is the schematic diagram according to the Mj module of the relevant technologies；
Fig. 4 is the structural block diagram one of AC-AC converter device according to an embodiment of the present invention；
Fig. 5 is the structural block diagram two of AC-AC converter device according to an embodiment of the present invention；
Fig. 6 is a kind of hardware configuration frame of the mobile terminal of the detection method of the access entitlements of scene of the embodiment of the present invention
Figure；
Fig. 7 is the flow chart of the connection method of power grid according to an embodiment of the present invention；
Fig. 8 is the structural block diagram of the attachment device of power grid according to an embodiment of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.
At present AC-AC converting means mainly have back-to-back and two kinds of solid transformer type, back-to-back type AC-DC, DC-AC
Two-level configuration, using double DC bus connections between two-stage.And solid transformer type is AC-DC, DC-DC, DC-AC tertiary structure,
AC-DC, DC-AC two-stage are that input and output are coupled using symmetrical star, have the DC-DC grade of corresponding number to pass between two-stage to be intermediate
Defeated grade is more DC bus mode of movement.
Fig. 1 is according to the schematic diagram of the soft straight converter station of back-to-back type MMC of the relevant technologies, as shown in Figure 1, each Mki (k=
A,B,C,a,b,c；I=1,2) module is that a full-bridge of N (N >=1) or half-bridge submodule are connected in series.A, B, C three-phase are quoted from exchange
Power grid 1, connecting three bridge arms is 1 end MMC converter station；A, for b, c three-phase quoted from AC network 2, connecting three bridge arms is 2 ends
MMC converter station.Both ends converter station is connected by positive and negative polar curve, and positive and negative polar curve undertakes whole power, after single polar curve failure, will be lost
Remove a large amount of loads.
Fig. 2 is according to the schematic diagram of the solid transformer type topological structure of the relevant technologies, as shown in Fig. 2, tri- coupling of A, B, C
From AC network 1, a, b, c three-phase quoted from AC network 2, Fig. 3 be according to the schematic diagram of the Mj module of the relevant technologies, it is each in Fig. 2
Mj (j=1~9) module is made of AC-DC, DC-DC, DC-AC three parts as shown in Figure 3.Each Ni mould in each Mj module
Block respectively includes positive and negative polar curve, and with the increase of serial module structure Ni in Mj, the power that each positive and negative polar curve of module undertakes is reduced, and is prevented
The presence of big load DC line, power loss is small after realizing single module or single polar curve failure, disturbs to whole system small
Function.
But solid transformer type converter station has used more power electronic devices than back-to-back MMC converter station, causes
Power loss is big, and control is complicated, high construction cost.
In order to provide more preferably Interface design scheme to multi-region minor scale power net, it is female to eliminate back-to-back type converting means single direct current
The disadvantages of line capacity is big and solid transformer type can not achieve good Fault Isolation effect, while integrating the two advantage, this reality
It applies and proposes a kind of AC-AC converter topology structure of improvement in example.Based on solid transformer type topological structure, give up centre
DC-DC grades, and the alternating expression double star output and input using misphase is coupled.
A kind of AC-AC converter device is provided in the present embodiment, and Fig. 4 is exchange-according to an embodiment of the present invention
The structural block diagram one of AC converter, as shown in figure 4, Communication-Communication AC-AC converting means, which uses, is based on solid transformer type
Topological structure, the topological structure based on solid transformer type includes: input stage AC-DC end AC-DC and output stage direct current-
Exchange end DC-AC, wherein the input terminal of input stage AC-DC end AC-DC is quoted from the first power grid, output stage DC-AC end
The output end of DC-AC is quoted from the second power grid；Between input stage AC-DC end AC-DC and output stage DC-AC end DC-AC
It is attached using alternating expression double star connecting mode.
It is DC-DC grades intermediate due to cancelling by above-mentioned AC-AC converter device, reduce intermediate link and a large amount of electricity
The use of power electronic device, therefore reduce control difficulty and device loss, reduce construction cost；The connection of double star alternating expression
When mode can realize the first power grid or individual event open-phase fault or three-phase imbalance operation occurs for the second power grid any end power grid, change
Stream station can convert converter station internal fault by converter station for the failure at failure end, pass through the isolation of converter station internal module
Or failure is eliminated in control.Therefore, it can solve the lower problem of the working efficiency of AC-AC converter device in the related technology,
Achieve the effect that the working efficiency for improving AC-AC converter device.
Fig. 5 is the structural block diagram two of AC-AC converter device according to an embodiment of the present invention, as shown in figure 5, optional
Ground, the topological structure based on solid transformer type include: Mj module, wherein j is the nature more than or equal to 1 and less than or equal to 9
It counts, includes input stage AC-DC end AC-DC and output stage DC-AC end DC-AC in each Mj module；First power grid (electricity
Net 1) draw input terminal include end A, end B and end C three-phase, the second power grid (power grid 2) draw input terminal include end a, end b and
Hold c three-phase；
Alternating expression double star connecting mode include: the AC-DC in each Mj module the first output end and DC-AC first
Input terminal connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect；
The first input end (M1in1) of AC-DC in M1 module is quoted from end A, the first output end of the DC-AC in M1 module
(M1out1) quoted from end a, the first input end (M4in1) of the AC-DC in M4 module is quoted from end B, and the of DC-AC in M2 module
One output end (M2out1) is quoted from end b, and the first input end (M7in1) of the AC-DC in M7 module is quoted from end C, in M3 module
The first output end (M3out1) of DC-AC is quoted from end c；
The second input terminal (M1in2) of AC-DC in M1 module and the first input end of the AC-DC in M2 module
(M2in1) it connects, the second input terminal (M2in2) of the AC-DC in M2 module and the first input end of the AC-DC in M3 module
(M3in1) it connects, the second input terminal (M3in2) of the AC-DC in M3 module and the second input terminal of the AC-DC in M6 module
(M6in2) the second input terminal (M9in2) of the AC-DC and in M9 module connects, the second input terminal of the AC-DC in M4 module
(M4in2) it is connect with the first input end (M5in1) of the AC-DC in M5 module, the second input terminal of the AC-DC in M5 module
(M5in2) it is connect with the first input end (M6in1) of the AC-DC in M6 module, the second input terminal of the AC-DC in M7 module
(M7in2) it is connect with the first input end (M8in1) of the AC-DC in M8 module, the second input terminal of the AC-DC in M8 module
(M8in2) it is connect with the first input end (M9in1) of the AC-DC in M9 module；
The second output terminal (M1out2) of DC-AC in M1 module and the first output end of the DC-AC in M4 module
(M4out1) it connects, the second output terminal (M2out2) of the DC-AC in M2 module and the first output end of the DC-AC in M5 module
(M5out1) it connects, the second output terminal (M3out2) of the DC-AC in M3 module and the first output end of the DC-AC in M6 module
(M6out1) it connects, the second output terminal (M4out2) of the DC-AC in M4 module and the first output end of the DC-AC in M7 module
(M7out1) it connects, the second output terminal (M5out2) of the DC-AC in M5 module and the first output end of the DC-AC in M8 module
(M8out1) it connects, the second output terminal (M6out2) of the DC-AC in M6 module and the first output end of the DC-AC in M9 module
(M9out1) it connects, the second output terminal (M7out2) of the DC-AC in M7 module and the second output terminal of the DC-AC in M8 module
(M8out2) second output terminal (M9out2) of the DC-AC and in M9 module connects.
It is DC-DC grades intermediate due to cancelling, reduce the use of intermediate link and a large amount of power electronic devices, therefore reduce
Difficulty and device loss are controlled, construction cost is reduced；Double star alternating expression connection type can realize that power grid 1 or power grid 2 are any
When individual event open-phase fault or three-phase imbalance operation occur for one end power grid, the failure at failure end can be passed through converter station by converter station
It is converted into converter station internal fault, failure is eliminated by the isolation or control of Mj module inside converter station.
Such as: the most extreme case of power grid three-phase imbalance is exactly single-phase decompression, will if 1 end A phase fault no-voltage of power grid
The end DC-AC of M1, M2, M3 are all adjusted to short-circuit condition (two IGBT of DC-AC above and below are constantly on), 2 end of power grid
A, b, c tri-phase connected mode and unchanged, three-phase is still symmetrical, only becomes two Mj moulds by three Mj modules in each phase
Block realizes Fault Isolation.
Several cell power grids can be connected as large regional grid operation by interface, no by the interface scheme that the present embodiment proposes
The capacity of short circuit that only can effectively limit large regional grid enhances the trend connection between each cell power grid, and reinforces each cell power grid
Between to disturbance and trouble isolation serviceability.
Embodiment of the method provided by the embodiment of the present application one can be in mobile terminal, terminal or similar fortune
It calculates and is executed in device.For running on mobile terminals, Fig. 6 is a kind of inspection of the access entitlements of scene of the embodiment of the present invention
The hardware block diagram of the mobile terminal of survey method.As shown in fig. 6, mobile terminal 10 may include it is one or more (in Fig. 6 only
Showing one) (processor 102 can include but is not limited to Micro-processor MCV or programmable logic device FPGA etc. to processor 102
Processing unit) and memory 104 for storing data, optionally, above-mentioned mobile terminal can also include for communicating function
The transmission device 106 and input-output equipment 108 of energy.It will appreciated by the skilled person that structure shown in fig. 6 is only
For signal, the structure of above-mentioned mobile terminal is not caused to limit.For example, mobile terminal 10 may also include than shown in Fig. 1
More perhaps less component or with the configuration different from shown in Fig. 6.
Memory 104 can be used for storing computer program, for example, the software program and module of application software, such as this hair
The corresponding computer program of the detection method of the access entitlements of scene in bright embodiment, processor 102 are stored in by operation
Computer program in memory 104 realizes above-mentioned method thereby executing various function application and data processing.It deposits
Reservoir 104 may include high speed random access memory, may also include nonvolatile memory, as one or more magnetic storage fills
It sets, flash memory or other non-volatile solid state memories.In some instances, memory 104 can further comprise relative to place
The remotely located memory of device 102 is managed, these remote memories can pass through network connection to mobile terminal 10.Above-mentioned network
Example includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Transmitting device 106 is used to that data to be received or sent via a network.Above-mentioned network specific example may include
The wireless network that the communication providers of mobile terminal 10 provide.In an example, transmitting device 106 includes a Network adaptation
Device (Network Interface Controller, referred to as NIC), can be connected by base station with other network equipments to
It can be communicated with internet.In an example, transmitting device 106 can for radio frequency (Radio Frequency, referred to as
RF) module is used to wirelessly be communicated with internet.
A kind of connection method of power grid is provided in the present embodiment, and Fig. 7 is the company of power grid according to an embodiment of the present invention
The flow chart of method is connect, as shown in fig. 7, the process includes the following steps:
Step S702 obtains the first power grid, the second power grid and AC-AC converter device, wherein Communication-Communication AC-AC
Converting means uses the topological structure based on solid transformer type, and the topological structure based on solid transformer type includes: input stage
AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end AC-DC and output stage
It is attached between the DC-AC of DC-AC end using alternating expression double star connecting mode；
AC-AC converter device is connected between the first power grid and the second power grid, wherein input stage by step S704
The input terminal of AC-DC end AC-DC is quoted from the first power grid, and the output end of output stage DC-AC end DC-AC is quoted from the second electricity
Net.
Through the above steps, due to cancelling intermediate DC-DC grades, reduce making for intermediate link and a large amount of power electronic devices
With, therefore reduce control difficulty and device loss, reduce construction cost；Double star alternating expression connection type can realize first
When individual event open-phase fault or three-phase imbalance operation occur for power grid or the second power grid any end power grid, converter station can be by failure
The failure at end is converted into converter station internal fault by converter station, eliminates event by the isolation or control of converter station internal module
Barrier.Therefore, it can solve the lower problem of the working efficiency of AC-AC converter device in the related technology, reach raising exchange-
The effect of the working efficiency of AC converter.
Optionally, in above-mentioned steps S704, drawing from the first power grid includes the input terminal held A, hold B and end C three-phase, and
Draw from high second power grid includes end a, end b and the input terminal for holding c three-phase；AC-AC converter device is double using alternating expression
Star connecting mode is connected to including end A, end B and holds the input terminal of C three-phase and includes end a, end b and the input terminal for holding c three-phase
Between.
Optionally, the topological structure based on solid transformer type includes: Mj module, wherein j is more than or equal to 1 and to be less than
Natural number equal to 9 includes input stage AC-DC end AC-DC and output stage DC-AC end DC-AC in each Mj module；
Alternating expression double star connecting mode include: the AC-DC in each Mj module the first output end and DC-AC first
Input terminal connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect；
The first input end of AC-DC in M1 module is quoted from A is held, and the first output end of the DC-AC in M1 module is quoted from end
The first input end of AC-DC in a, M4 module is quoted from B is held, and the first output end of the DC-AC in M2 module is quoted from end b, M7 mould
The first input end of AC-DC in block is quoted from C is held, and the first output end of the DC-AC in M3 module is quoted from end c；
The second input terminal of AC-DC in M1 module is connect with the first input end of the AC-DC in M2 module, in M2 module
The second input terminal of AC-DC connect with the first input end of the AC-DC in M3 module, second of the AC-DC in M3 module is defeated
Enter end to connect with the second input terminal of the AC-DC in the second input terminal and M9 module of the AC-DC in M6 module, in M4 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M5 module, the second input of the AC-DC in M5 module
End is connect with the first input end of the AC-DC in M6 module, in the second input terminal and M8 module of the AC-DC in M7 module
The first input end of AC-DC connects, the first input of the second input terminal and the AC-DC in M9 module of the AC-DC in M8 module
End connection；
The second output terminal of DC-AC in M1 module is connect with the first output end of the DC-AC in M4 module, in M2 module
The second output terminal of DC-AC connect with the first output end of the DC-AC in M5 module, second of the DC-AC in M3 module is defeated
Outlet is connect with the first output end of the DC-AC in M6 module, in the second output terminal and M7 module of the DC-AC in M4 module
The first output end of DC-AC connects, the second output terminal of the DC-AC in M5 module and the first output of the DC-AC in M8 module
End connects, and the second output terminal of the DC-AC in M6 module is connect with the first output end of the DC-AC in M9 module, in M7 module
DC-AC second output terminal and M8 module in DC-AC second output terminal and the DC-AC in M9 module second output terminal
Connection.
Optionally, after above-mentioned steps S704, end A, end B included by the first power grid is being detected and is holding C three-phase
In input terminal target input occur no-voltage failure in the case where, by target input in AC-AC converter device institute
The module of connection is isolated.
It is alternatively possible to but be not limited by following manner to target input the company, institute in AC-AC converter device
The module connect is isolated: the module that target input is connected in AC-AC converter device is adjusted to short-circuit condition.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing
The part that technology contributes can be embodied in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server or network equipment etc.) execute method described in each embodiment of the present invention.
A kind of attachment device of power grid is additionally provided in the present embodiment, and the device is for realizing above-described embodiment and preferably
Embodiment, the descriptions that have already been made will not be repeated.As used below, predetermined function may be implemented in term " module "
The combination of software and/or hardware.Although device described in following embodiment is preferably realized with software, hardware, or
The realization of the combination of person's software and hardware is also that may and be contemplated.
Fig. 8 is the structural block diagram of the attachment device of power grid according to an embodiment of the present invention, as shown in figure 8, the device includes:
Module 82 is obtained, for obtaining the first power grid, the second power grid and AC-AC converter device, wherein exchange-friendship
It flows AC-AC converting means and uses the topological structure based on solid transformer type, the topological structure based on solid transformer type includes:
Input stage AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end AC-DC with
It is attached between output stage DC-AC end DC-AC using alternating expression double star connecting mode；
Link block 84, for AC-AC converter device to be connected between the first power grid and the second power grid, wherein
The input terminal of input stage AC-DC end AC-DC quoted from the first power grid, the output end of output stage DC-AC end DC-AC quoted from
Second power grid.
Optionally, link block is used for: drawing from the first power grid includes end A, end B and the input terminal for holding C three-phase, and from height
It includes end a, end b and the input terminal for holding c three-phase that second power grid, which is drawn,；AC-AC converter device is used into alternating expression double star
Connecting mode is connected to including end A, end B and holds the input terminal of C three-phase and including between end a, end b and the input terminal for holding c three-phase.
Optionally, the topological structure based on solid transformer type includes: Mj module, wherein j is more than or equal to 1 and to be less than
Natural number equal to 9 includes input stage AC-DC end AC-DC and output stage DC-AC end DC-AC in each Mj module；
Alternating expression double star connecting mode include: the AC-DC in each Mj module the first output end and DC-AC first
Input terminal connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect；
The first input end of AC-DC in M1 module is quoted from A is held, and the first output end of the DC-AC in M1 module is quoted from end
The first input end of AC-DC in a, M4 module is quoted from B is held, and the first output end of the DC-AC in M2 module is quoted from end b, M7 mould
The first input end of AC-DC in block is quoted from C is held, and the first output end of the DC-AC in M3 module is quoted from end c；
The second input terminal of AC-DC in M1 module is connect with the first input end of the AC-DC in M2 module, in M2 module
The second input terminal of AC-DC connect with the first input end of the AC-DC in M3 module, second of the AC-DC in M3 module is defeated
Enter end to connect with the second input terminal of the AC-DC in the second input terminal and M9 module of the AC-DC in M6 module, in M4 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M5 module, the second input of the AC-DC in M5 module
End is connect with the first input end of the AC-DC in M6 module, in the second input terminal and M8 module of the AC-DC in M7 module
The first input end of AC-DC connects, the first input of the second input terminal and the AC-DC in M9 module of the AC-DC in M8 module
End connection；
The second output terminal of DC-AC in M1 module is connect with the first output end of the DC-AC in M4 module, in M2 module
The second output terminal of DC-AC connect with the first output end of the DC-AC in M5 module, second of the DC-AC in M3 module is defeated
Outlet is connect with the first output end of the DC-AC in M6 module, in the second output terminal and M7 module of the DC-AC in M4 module
The first output end of DC-AC connects, the second output terminal of the DC-AC in M5 module and the first output of the DC-AC in M8 module
End connects, and the second output terminal of the DC-AC in M6 module is connect with the first output end of the DC-AC in M9 module, in M7 module
DC-AC second output terminal and M8 module in DC-AC second output terminal and the DC-AC in M9 module second output terminal
Connection.
Optionally, above-mentioned apparatus further include: isolation module, for detect end A included by the first power grid, end B and
It holds in the input terminal of C three-phase in the case where target input generation no-voltage failure, by target input in AC-AC converter
The module isolation connected in device.
Optionally, above-mentioned isolation module is used for: the module that target input is connected in AC-AC converter device
It is adjusted to short-circuit condition.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong
Following manner realization is crossed, but not limited to this: above-mentioned module is respectively positioned in same processor；Alternatively, above-mentioned modules are with any
Combined form is located in different processors.
The embodiments of the present invention also provide a kind of storage medium, computer program is stored in the storage medium, wherein
The computer program is arranged to execute the step in any of the above-described embodiment of the method when operation.
Optionally, in the present embodiment, above-mentioned storage medium can be set to store by executing based on following steps
Calculation machine program:
S1 obtains the first power grid, the second power grid and AC-AC converter device, wherein Communication-Communication AC-AC transformation dress
It sets using the topological structure based on solid transformer type, the topological structure based on solid transformer type includes: that input stage exchange-is straight
Flow end AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end AC-DC and output stage direct current-friendship
It is attached between stream end DC-AC using alternating expression double star connecting mode；
AC-AC converter device is connected between the first power grid and the second power grid by S2, wherein input stage exchange-straight
The input terminal of end AC-DC is flowed quoted from the first power grid, and the output end of output stage DC-AC end DC-AC is quoted from the second power grid.
Optionally, in the present embodiment, above-mentioned storage medium can include but is not limited to: USB flash disk, read-only memory (Read-
Only Memory, referred to as ROM), it is random access memory (Random Access Memory, referred to as RAM), mobile hard
The various media that can store computer program such as disk, magnetic or disk.
The embodiments of the present invention also provide a kind of electronic device, including memory and processor, stored in the memory
There is computer program, which is arranged to run computer program to execute the step in any of the above-described embodiment of the method
Suddenly.
Optionally, above-mentioned electronic device can also include transmission device and input-output equipment, wherein the transmission device
It is connected with above-mentioned processor, which connects with above-mentioned processor.
Optionally, in the present embodiment, above-mentioned processor can be set to execute following steps by computer program:
S1 obtains the first power grid, the second power grid and AC-AC converter device, wherein Communication-Communication AC-AC transformation dress
It sets using the topological structure based on solid transformer type, the topological structure based on solid transformer type includes: that input stage exchange-is straight
Flow end AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end AC-DC and output stage direct current-friendship
It is attached between stream end DC-AC using alternating expression double star connecting mode；
AC-AC converter device is connected between the first power grid and the second power grid by S2, wherein input stage exchange-straight
The input terminal of end AC-DC is flowed quoted from the first power grid, and the output end of output stage DC-AC end DC-AC is quoted from the second power grid.
Optionally, the specific example in the present embodiment can be with reference to described in above-described embodiment and optional embodiment
Example, details are not described herein for the present embodiment.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.It is all within principle of the invention, it is made it is any modification, etc.
With replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of AC-AC converter device, which is characterized in that the Communication-Communication AC-AC converting means, which uses, is based on solid
The topological structure of transformer type, the topological structure based on solid transformer type include: input stage AC-DC end AC-DC
With output stage DC-AC end DC-AC, wherein
The input terminal of input stage AC-DC end AC-DC is quoted from the first power grid, output stage DC-AC end DC-AC
Output end quoted from the second power grid；
Alternating expression double star is used between input stage AC-DC end AC-DC and output stage DC-AC end DC-AC
Property connecting mode is attached.
2. AC-AC converter device according to claim 1, which is characterized in that
The topological structure based on solid transformer type includes: Mj module, wherein j is more than or equal to 1 and less than or equal to 9
Natural number includes input stage AC-DC end AC-DC and output stage DC-AC end DC- in each Mj module
AC；The input terminal that first power grid is drawn includes end A, end B and end C three-phase, and the input terminal that second power grid is drawn includes
Hold a, end b and end c three-phase；
The alternating expression double star connecting mode includes: the first output end and DC-AC of the AC-DC in each Mj module
First input end connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect；
The first input end of AC-DC in M1 module is quoted from A is held, and the first output end of the DC-AC in M1 module is quoted from end a, M4
The first input end of AC-DC in module is quoted from end B, and the first output end of the DC-AC in M2 module is quoted from end b, in M7 module
AC-DC first input end quoted from end C, the first output end of the DC-AC in M3 module is quoted from end c；
The second input terminal of AC-DC in M1 module is connect with the first input end of the AC-DC in M2 module, in M2 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M3 module, the second input of the AC-DC in M3 module
End is connect with the second input terminal of the AC-DC in the second input terminal and M9 module of the AC-DC in M6 module, in M4 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M5 module, the second input of the AC-DC in M5 module
End is connect with the first input end of the AC-DC in M6 module, in the second input terminal and M8 module of the AC-DC in M7 module
The first input end of AC-DC connects, the first input of the second input terminal and the AC-DC in M9 module of the AC-DC in M8 module
End connection；
The second output terminal of DC-AC in M1 module is connect with the first output end of the DC-AC in M4 module, in M2 module
The second output terminal of DC-AC is connect with the first output end of the DC-AC in M5 module, the second output of the DC-AC in M3 module
End is connect with the first output end of the DC-AC in M6 module, in the second output terminal and M7 module of the DC-AC in M4 module
The first output end of DC-AC connects, the second output terminal of the DC-AC in M5 module and the first output of the DC-AC in M8 module
End connects, and the second output terminal of the DC-AC in M6 module is connect with the first output end of the DC-AC in M9 module, in M7 module
DC-AC second output terminal and M8 module in DC-AC second output terminal and the DC-AC in M9 module second output terminal
Connection.
3. a kind of connection method of power grid characterized by comprising
Obtain the first power grid, the second power grid and AC-AC converter device, wherein the Communication-Communication AC-AC converting means
Using the topological structure based on solid transformer type, the topological structure based on solid transformer type includes: input stage exchange-
DC terminal AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end AC-DC and the output
It is attached between grade DC-AC end DC-AC using alternating expression double star connecting mode；
The AC-AC converter device is connected between first power grid and second power grid, wherein the input
The input terminal of grade AC-DC end AC-DC is quoted from first power grid, the output end of output stage DC-AC end DC-AC
Quoted from second power grid.
4. according to the method described in claim 3, it is characterized in that, the AC-AC converter device is connected to described
Include: between one power grid and second power grid
Drawing from first power grid includes end A, end B and the input terminal for holding C three-phase, and includes from the high second power grid extraction
Hold a, end b and the input terminal for holding c three-phase；
The AC-AC converter device is connected to using the alternating expression double star connecting mode including end A, end B and end C
The input terminal of three-phase and including end a, end b and hold c three-phase input terminal between.
5. according to the method described in claim 4, it is characterized in that,
The topological structure based on solid transformer type includes: Mj module, wherein j is more than or equal to 1 and less than or equal to 9
Natural number includes input stage AC-DC end AC-DC and output stage DC-AC end DC- in each Mj module
AC；
The alternating expression double star connecting mode includes: the first output end and DC-AC of the AC-DC in each Mj module
First input end connects, and the second output terminal of the AC-DC in each Mj module and the second input terminal of DC-AC connect；
The first input end of AC-DC in M1 module is quoted from A is held, and the first output end of the DC-AC in M1 module is quoted from end a, M4
The first input end of AC-DC in module is quoted from end B, and the first output end of the DC-AC in M2 module is quoted from end b, in M7 module
AC-DC first input end quoted from end C, the first output end of the DC-AC in M3 module is quoted from end c；
The second input terminal of AC-DC in M1 module is connect with the first input end of the AC-DC in M2 module, in M2 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M3 module, the second input of the AC-DC in M3 module
End is connect with the second input terminal of the AC-DC in the second input terminal and M9 module of the AC-DC in M6 module, in M4 module
The second input terminal of AC-DC is connect with the first input end of the AC-DC in M5 module, the second input of the AC-DC in M5 module
End is connect with the first input end of the AC-DC in M6 module, in the second input terminal and M8 module of the AC-DC in M7 module
The first input end of AC-DC connects, the first input of the second input terminal and the AC-DC in M9 module of the AC-DC in M8 module
End connection；
The second output terminal of DC-AC in M1 module is connect with the first output end of the DC-AC in M4 module, in M2 module
The second output terminal of DC-AC is connect with the first output end of the DC-AC in M5 module, the second output of the DC-AC in M3 module
End is connect with the first output end of the DC-AC in M6 module, in the second output terminal and M7 module of the DC-AC in M4 module
The first output end of DC-AC connects, the second output terminal of the DC-AC in M5 module and the first output of the DC-AC in M8 module
End connects, and the second output terminal of the DC-AC in M6 module is connect with the first output end of the DC-AC in M9 module, in M7 module
DC-AC second output terminal and M8 module in DC-AC second output terminal and the DC-AC in M9 module second output terminal
Connection.
6. according to the method described in claim 4, it is characterized in that, described the AC-AC converter device to be connected to
After between first power grid and second power grid, the method also includes:
Target input occurs without electricity in detecting end A, end B and the input terminal for holding C three-phase included by first power grid
In the case where pressing failure, the module that the target input is connected in the AC-AC converter device is isolated.
7. according to the method described in claim 6, it is characterized in that, by the target input in the AC-AC converter
The module connected in device is isolated
The module that the target input is connected in the AC-AC converter device is adjusted to short-circuit condition.
8. a kind of attachment device of power grid characterized by comprising
Module is obtained, for obtaining the first power grid, the second power grid and AC-AC converter device, wherein the Communication-Communication
AC-AC converting means uses the topological structure based on solid transformer type, the topological structure packet based on solid transformer type
It includes: input stage AC-DC end AC-DC and output stage DC-AC end DC-AC, wherein input stage AC-DC end
It is attached between AC-DC and output stage DC-AC end DC-AC using alternating expression double star connecting mode；
Link block, for the AC-AC converter device to be connected between first power grid and second power grid,
Wherein, the input terminal of input stage AC-DC end AC-DC is quoted from first power grid, output stage DC-AC end
The output end of DC-AC is quoted from second power grid.
9. a kind of storage medium, which is characterized in that be stored with computer program in the storage medium, wherein the computer
Program is arranged to execute method described in any one of claim 3 to 7 when operation.
10. a kind of electronic device, including memory and processor, which is characterized in that be stored with computer journey in the memory
Sequence, the processor are arranged to run the computer program to execute side described in any one of claim 3 to 7
Method.
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| CN105490552A (en) * | 2016-01-12 | 2016-04-13 | 中国电力科学研究院 | Modular multilevel converter (MMC) based solid-state transformer and control method thereof |
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| CN102231531A (en) * | 2011-06-23 | 2011-11-02 | 中电普瑞科技有限公司 | Wind electric field electrical network voltage disturbance simulation generating device |
| CN103516230A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Bi-directional power flow controlled multi-level mutual balance solid state transformer and realization method thereof |
| CN204031006U (en) * | 2014-08-18 | 2014-12-17 | 国家电网公司 | A kind of power model group of three-phase power electronic transformer |
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