CN206076972U - A kind of AC-DC hybrid power grid - Google Patents
A kind of AC-DC hybrid power grid Download PDFInfo
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- CN206076972U CN206076972U CN201620786365.6U CN201620786365U CN206076972U CN 206076972 U CN206076972 U CN 206076972U CN 201620786365 U CN201620786365 U CN 201620786365U CN 206076972 U CN206076972 U CN 206076972U
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Abstract
This utility model is related to electrical equipment technical field，Specifically related to a kind of AC-DC hybrid power grid，Including several transformer stations，In the transformer station, at least one is flexible transformer station，Each transformer station includes high-voltage alternating system、High-voltage direct current、Low-voltage alternating-current system、It is part or all of in low-voltage direct-current system，High-voltage alternating system in each flexible transformer station、High-voltage direct current、Low-voltage alternating-current system、Low-voltage direct-current system is mutually unified into net respectively，The technical program does further perfect to the function of existing power distribution network in the art，The purpose that power distribution network can provide high voltage direct current and low-voltage DC while High Level AC Voltage and low-voltage AC is provided again is reached，Solving existing power distribution network only provides pattern single alternating current、Galvanic problem directly cannot be provided，Realize the flexible interconnection between power distribution network difference electric pressure ac and dc systemses，Trend flexible and failure are quickly isolated.
Description
Technical field
This utility model is related to electrical equipment technical field, and in particular to a kind of AC-DC hybrid power grid.
Background technology
As the scale of regenerative resource accesses the extensive application of the DC loads such as distribution, electric automobile, data center,
In the situation that distribution side presents power of alterating and direct current, alternating current-direct current load coexists.Transformer station as energy exchange node in distribution, its
Controllability and power supply motility are increasingly becoming industry concern and the focus studied, and traditional mechanical electromagnetic type, powering mode are single
Transformer station is difficult the needs for meeting following power distribution network development.
In order to solve this problem, the patent document of Publication No. CN203800620U discloses a kind of based on single conductor friendship
The distribution network system of direct current hybrid technology, system include some alternating current sources and some DC sources, the first alternating current source and DC source
It is connected with the first Z-type transformator, the first Z-type transformator and the second Z-type transformator are by connection, the second Z-type transformator
It is connected with boosting ripple electric current, the second Z-type transformator is also connected with the second alternating current source, the first alternating current source is connected with one first load,
The second load is connected between second alternating current source and the second Z-type transformator, on the premise of without serious wave distortion, to realize handing over
The fusion of stream and direct current.
However, documents are equipped with independent DC source and alternating current source, to flexible networking mainly using Z-type transformator
There is certain limitation, and be not suitable for alternating current and galvanic situation can still being provided without single DC source, therefore,
The alternating current-direct current hybrid power supply net of flexible networking is still a great problem that those skilled in the art face.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome power distribution network of the prior art provide to carry out
The defect that large-scale direct current is powered, so as to provide a kind of AC-DC hybrid power grid, concrete scheme is：
A kind of AC-DC hybrid power grid, including
Several flexible transformer stations, described each flexible transformer station include multiple electric pressure NETOMACs, described
During each flexible transformer station includes high-voltage alternating system, high-voltage direct current, low-voltage alternating-current system, low-voltage direct-current system respectively
Partly or entirely, high-voltage alternating system, high-voltage direct current, a low pressure are at least included in flexible transformer station of institute
AC system and a low-voltage direct-current system；
High-voltage alternating system, high-voltage direct current in described each flexible transformer station, low-voltage alternating-current system, low-voltage direct
System is mutually unified into net respectively.
Above-mentioned AC-DC hybrid power grid, wherein, the plurality of electric pressure NETOMAC includes high-voltage alternating interface, height
Straightening stream interface, low-voltage alternating-current interface and low-voltage direct interface.
Above-mentioned AC-DC hybrid power grid, wherein, it is the high-voltage alternating system, high-voltage direct current, low-voltage alternating-current system, low
To and fro flow of power is realized by flexible transformer station between straightening streaming system any two.
Above-mentioned AC-DC hybrid power grid, the voltage of the high-voltage alternating system and low-voltage alternating-current system of the flexible transformer station,
The voltage scalable of frequency and the equal scalable of phase place, the high-voltage direct current and low-voltage direct-current system.
Above-mentioned AC-DC hybrid power grid, wherein, first is provided between the high-voltage alternating system and low-voltage alternating-current system
High Level AC Voltage is transformed to low pressure friendship by voltage transformation module and first voltage inverse transform module, the first voltage conversion module
Low-voltage AC is transformed to High Level AC Voltage by stream electricity, the first voltage inverse transform module.
Above-mentioned AC-DC hybrid power grid, wherein, is provided with the high-voltage direct current and the low-voltage direct-current system
High voltage direct current is transformed to low pressure by two voltage transformation modules and second voltage inverse transform module, the second voltage conversion module
Low-voltage DC is transformed to high voltage direct current by unidirectional current, the second voltage inverse transform module.
Above-mentioned AC-DC hybrid power grid, wherein, it is provided between the high-voltage alternating system and the high-voltage direct current
High Level AC Voltage is transformed to height by the first power conversion modules and the first power inverting mold changing block, first power conversion modules
High voltage direct current is transformed to High Level AC Voltage by pressure unidirectional current, the first power inverting mold changing block.
Above-mentioned AC-DC hybrid power grid, wherein, it is provided between the low-voltage alternating-current system and the low-voltage direct-current system
Second power conversion modules and the second power inverting mold changing block, low-voltage AC is transformed to low by second power conversion modules
Low-voltage DC is transformed to low-voltage AC by pressure unidirectional current, the second power inverting mold changing block.
Above-mentioned AC-DC hybrid power grid, wherein, the first voltage conversion module and first voltage inverse transform module are only
Vertical module or the integrated module to integrate, the second voltage conversion module with second voltage inverse transform module is
Independent module or the integrated module to integrate, first power conversion modules and the first power inverting mold changing block
For independent module or integrated module to integrate, second power conversion modules and the mold changing of the second power inverting
Block is independent module or the integrated module to integrate.
Above-mentioned AC-DC hybrid power grid, wherein, new forms of energy and energy-storage system are directly accessed in the high-voltage direct current, are used
Electric energy is provided when when higher level's electric network fault or exception.
Above-mentioned AC-DC hybrid power grid, wherein, it is respectively connected in the low-voltage alternating-current system, low-voltage direct-current system distributed
Power supply, energy storage, for when higher level's electric network fault or it is abnormal when electric energy is provided.
Above-mentioned AC-DC hybrid power grid, wherein, in the AC-DC hybrid power grid, one or several flexible transformer stations go out
During existing failure, other the flexible transformer station's normal works in AC-DC hybrid power grid in addition to the flexible transformer station broken down.
Technical solutions of the utility model, have the advantage that：
The AC-DC hybrid power grid that this utility model is provided, existing power distribution network in the art can be provided High Level AC Voltage and
The function of low-voltage DC does further perfect, has reached while High Level AC Voltage and low-voltage AC is provided and can provide
The purpose of high voltage direct current and low-voltage DC, solves existing power distribution network and provides the single alternating current of pattern, directly cannot carry
For galvanic problem.
The AC-DC hybrid power grid that this utility model is provided, High Level AC Voltage, high voltage direct current, low-voltage AC and low pressure
Both in unidirectional current mutually can convert, at the same time, the HVDC system in AC-DC hybrid power grid of the present utility model
System is directly accessed new forms of energy and energy-storage system, and distributed power source can directly feed high-voltage direct current and low-voltage direct-current system,
Distributed power source and energy-storage system can be respectively connected in low-voltage alternating-current system and low-voltage direct-current system, can be in flexible transformer station
In mutually convert, also can higher level's electric network fault or it is abnormal when, provide electric energy for AC-DC hybrid power grid.
Description of the drawings
In order to be illustrated more clearly that this utility model specific embodiment or technical scheme of the prior art, below will be right
Needed for specific embodiment or description of the prior art, accompanying drawing to be used is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of AC-DC hybrid power grid in one preferred embodiment of this utility model；
Fig. 2 a-2c show for the structure of the flexible transformer station in AC-DC hybrid power grid in one preferred embodiment of this utility model
It is intended to；
Reference：
The 3rd flexible transformer stations of 1- the first flexibility the second flexibilities of transformer station 2- transformer station 3-
11.21.31- high-voltage alternating system 12.22.32- high-voltage direct current
13.23.33- low-voltage alternating-current system 14.24.34- high-voltage direct current.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of this utility model, rather than the embodiment of whole.Based on the embodiment in this utility model, this
The every other embodiment obtained under the premise of creative work is not made by field those of ordinary skill, belongs to practical
Novel protected scope.
In description of the present utility model, it should be noted that term " first ", " second ", " the 3rd " are only used for description
Purpose, and it is not intended that indicating or implying relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " is connected "
" connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can be with
It is to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, be can also be
The connection of two element internals, can be wireless connection, or wired connection.For one of ordinary skill in the art
Speech, can understand concrete meaning of the above-mentioned term in this utility model with concrete condition.
Embodiment 1
The structure with reference to shown in Fig. 1, this utility model provide a kind of AC-DC hybrid power grid, including several flexible power transformations
Stand, used as a kind of preferred embodiment, the AC-DC hybrid power grid includes 3 flexible transformer stations, the first flexible transformer station 1, the
Two flexible transformer stations 2 and the 3rd flexible transformer station 3, each flexible transformer station include high-voltage alternating system, high-voltage direct current,
One or more in low-voltage alternating-current system and low-voltage direct-current system, by first flexibility transformer station the 1, second flexibility 2 and of transformer station
The AC-DC hybrid power grid that 3rd flexible transformer station 3 is constituted at least including a high-voltage alternating system, high-voltage direct current,
One low-voltage alternating-current system and a low-voltage direct-current system.Each flexible transformer station includes the interface of multiple electric pressures, as
One preferred embodiment of this utility model, each flexible transformer station including multiple grades voltage interface, can with but not only
It is limited to high-voltage alternating interface, HVDC interface, low-voltage alternating-current interface and low-voltage direct interface, the first flexible transformer station 1 includes
High-voltage alternating system 11, high-voltage direct current 12, low-voltage alternating-current system 13 and low-voltage direct-current system 14, the second flexible transformer station 2
Including high-voltage alternating system 21, high-voltage direct current 22, low-voltage alternating-current system 23 and low-voltage direct-current system 24, the 3rd flexible power transformation
3 are stood including high-voltage alternating system 31, high-voltage direct current 32, low-voltage alternating-current system 33 and low-voltage direct-current system 34, wherein, the
The high-voltage alternating interface 110 of one flexible transformer station 1 and the high-voltage alternating interface 210 of the second flexible transformer station 2 and the 3rd flexible change
The high-voltage alternating interface 310 in power station 3 interconnects to form high-voltage alternating network；The HVDC interface 120 of the first flexible transformer station 1
Interconnected with the HVDC interface 220 of the second flexible transformer station 2 and the HVDC interface 320 of the 3rd flexible transformer station 3 with shape
Into HVDC network, new forms of energy and energy-storage system in the HVDC network, can be directly accessed；First flexible transformer station 1 it is low
Pressure exchange interface 130 is connect with the low-voltage alternating-current interface 230 of the second flexible transformer station 2 and the low-voltage alternating-current of the 3rd flexible transformer station 3
Mouth 330 interconnects to form low-voltage alternating-current network；The low-voltage direct interface 140 of the first flexible transformer station 1 and the second flexible transformer station 2
Low-voltage direct interface 240 and the low-voltage direct interface 340 of the 3rd flexible transformer station 3 interconnect to form low-pressure direct drift net.
In Fig. 1, the electrical network incoming end 200 of 100, the second flexible transformer station 2 of electrical network incoming end of the first flexible transformer station 1 with
And the 3rd the electrical network incoming end 300 of flexible transformer station 3 to be respectively first the 1, second flexible transformer station 2 and the 3rd of flexible transformer station soft
Property transformer station 3 electrical network access provide interface, it is notable that electrical network incoming end 100, electrical network incoming end 200 and electrical network connect
Entering the higher level's electrical network for accessing at end 300 can be with identical, it is also possible to incomplete same, or even the 1, the second flexible change of the first flexible transformer station
Higher level's electrical network that power station 2 and the 3rd flexible transformer station 3 access is differed, and first the 1, second flexible transformer station of flexible transformer station
2 and the 3rd low-voltage alternating-current system in flexible transformer station 3, low-voltage direct-current system be respectively connected to distributed power source or energy storage device,
For when higher level's electric network fault of flexible substation connection or it is abnormal when electric energy is provided.
Generally, first the 1, second flexible transformer station 2 of flexible transformer station and the 3rd flexible transformer station 3 can receive
Electric energy in higher level's electrical network, is then supplied to corresponding load through a series of conversion, and works as higher level's electrical network and can not carry for some reason
Some or several flexible transformer stations in the AC-DC hybrid power grid is caused to receive not for electric energy or transmission line malfunction
During the electric energy provided to higher level's electrical network, the first flexible transformer station 1 and/or the second flexible transformer station 2 and/or the 3rd flexible transformer station
The distributed power source or energy storage device that low-voltage alternating-current system, low-voltage direct-current system in 3 is accessed thinks the first flexible transformer station 1
And/or second flexible transformer station 2 and/or the 3rd flexible transformer station 3 electric energy is provided, it is to avoid once the offer of higher level's electrical network is not provided
The electric energy electrical network will be unable to the technological deficiency of work.
Preferably, in the AC-DC hybrid power grid in the present embodiment, when one or several flexible transformer stations break down,
Other flexible transformer station's normal works in AC-DC hybrid power grid in addition to the flexible transformer station broken down.
It is in the AC-DC hybrid power grid of the present embodiment, when cisco unity malfunction is broken down in flexible transformer station, excellent
Choosing but be not limited only to, the first flexible transformer station 1 for some reason cannot normal work, then the second flexible transformer station 2 and the 3rd flexible power transformation
3 AC-DC hybrid power grids for constituting of standing do as usual and work, and when event occur in the first flexible transformer station 1 and the second flexible transformer station 2
When hindering and cannot work, the 3rd flexible transformer station normal work provides electric energy for the load in the AC-DC hybrid power grid.
Why this utility model can provide unidirectional current, including high voltage direct current and low-voltage DC, be because practical
Power conversion modules, including the first power conversion modules and the second power conversion mould are provided with flexible transformer station in new
High Level AC Voltage is transformed to high voltage direct current by block, the first power conversion modules, and the second power conversion modules are by low-voltage AC
Low-voltage DC is transformed to, meanwhile, second voltage conversion module and second voltage inverse transform module are provided with this utility model,
Mutually can convert between low-voltage DC and high voltage direct current, the transformer station that thoroughly breaks traditions can only provide alternating current (to be included
High Level AC Voltage and low-voltage AC) technical scheme, wherein, flexible transformer station is the transformer station based on power electronics,
While alternating current is provided, unidirectional current can be equally provided.
Specifically, referring to Fig. 2 a～structure shown in 2c, in Fig. 2 a, the first flexible transformer station 1 includes that first voltage becomes mold changing
Block 19 and first voltage inverse transform module 10, first voltage conversion module 19 and first voltage inverse transform module 10 respectively with height
Pressure AC system 11 and low-voltage alternating-current system 13 connect, and first voltage conversion module 19 will be the part in high-voltage alternating system 11 high
Pressure convert alternating current is electrically accessed in low-voltage alternating-current system 13 for low-voltage alternating-current, and first voltage inverse transform module 10 is to hand over low pressure
Low-voltage AC in streaming system 13 is transformed to High Level AC Voltage and accesses in high-voltage alternating system 11；First flexible transformer station 1
Also include second voltage conversion module 124 and second voltage inversion module 142, second voltage conversion module 124 and second is electric
Pressure inversion module 142 is respectively connected with high-voltage direct current 12 and low-voltage direct-current system 14, second voltage change module 124
By the partial high pressure DC conversion in high-voltage direct current 12 is for low-voltage DC and is stored in low-voltage direct-current system 14, the
Part low-voltage DC in low-voltage direct-current system 14 is converted into high voltage direct current and accesses height by two voltage inversion modules 142
In straightening streaming system 12；First flexible transformer station 1 also includes the first power conversion modules 15 and the second power conversion modules 16, its
In, the first power conversion modules 15 are connected with high-voltage alternating system 11 and high-voltage direct current 12 respectively, by high-voltage alternating system
Partial high pressure convert alternating current in 11 be high-voltage direct current in high voltage direct current, the second power conversion modules 16 respectively with
Low-voltage alternating-current system 13 and low-voltage direct-current system 14 connect, and the part low-voltage AC in low-voltage alternating-current system 13 are transformed to low
14 low-voltage DC in straightening streaming system；First flexible transformer station 1 also includes that the first power inverting changes the mold block 17 and the second work(
Rate inverse transform module 18, wherein, the first power inverting mold changing block 17 respectively with high-voltage alternating system 11 and high-voltage direct current 12
Connection, by the partial high pressure DC power conversion in high-voltage direct current 13 is for High Level AC Voltage and accesses high-voltage alternating system 11
In, the second power inverting mold changing block 18 is connected with low-voltage alternating-current system 13 and low-voltage direct-current system 14 respectively, by low-voltage direct system
Part low-voltage DC in 14 in system is transformed to low-voltage AC and accesses in low-voltage alternating-current system 13.
Similar, referring to structure shown in Fig. 2 b, the second flexible transformer station 2 includes first voltage conversion module 29 and the
One voltage inverse transform module 20, first voltage conversion module 29 and first voltage inverse transform module 20 respectively with high-voltage alternating system
21 and low-voltage alternating-current system 23 connect, to complete the conversion of High Level AC Voltage and low-voltage AC, shift theory and the figure of voltage
First voltage conversion module 19 in 2a is identical with the principle of first voltage inverse transform module 10, here, not repeating；Second is soft
Property transformer station 2 also include second voltage conversion module 224 and second voltage inverse transform module 242, second voltage conversion module 224
Respectively it is connected with high-voltage direct current 22 and low-voltage direct-current system 24 with second voltage inverse transform module 242, to complete high pressure
The mutual conversion of unidirectional current and low-voltage DC；Second flexible transformer station 2 also includes the first power conversion modules 25 and the second work(
Rate conversion module 26, the first power conversion modules 25 are connected with high-voltage alternating system 21 and high-voltage direct current 22 respectively, will
Partial high pressure convert alternating current in high-voltage alternating system is the high voltage direct current in high-voltage direct current, the second power conversion mould
Block 26 is connected with low-voltage alternating-current system 23 and low-voltage direct-current system 24 respectively, and the part low pressure in low-voltage alternating-current system 23 is handed over
Stream electricity is transformed to the low-voltage DC in low-voltage direct-current system 24；Also change including the first power inverting in second flexible transformer station 2
Module 27 and the second power inverting mold changing block 28, the first power inverting mold changing block 27 respectively with high-voltage alternating system 21 and high straightening
Streaming system 22 connects, to complete the partial high pressure unidirectional current in high-voltage direct current to the conversion of High Level AC Voltage, the second power
Inverse transform module 28 is connected with low-voltage alternating-current system 23 and low-voltage direct-current system 24 respectively, by the portion in low-voltage direct-current system 24
Low-voltage DC is divided to be transformed to low-voltage AC.
Referring to structure shown in Fig. 2 c, the 3rd flexible transformer station 3 includes first voltage conversion module 39, first voltage inversion
Mold changing block 30, second voltage conversion module 324 and second voltage inverse transform module 342, first voltage conversion module 39, first are electric
The connected mode and operation principle of pressure inverse transform module 30, second voltage conversion module 324 and second voltage inverse transform module 342
It is similar with the mode of the first flexible transformer station 1 and the second flexible transformer station 2；3rd flexible transformer station 3 also becomes including the first power
Mold changing block 35, the second power conversion modules 36, the first power inverting mold changing block 37 and the second power inverting mold changing block 38, wherein,
The first power conversion modules 35, the second power conversion modules 36 and the first power inverting mold changing block in 3rd flexible transformer station 3
37 and the second high-voltage alternating system 31 in power inverting mold changing block 38 and the 3rd flexibility transformer station 3, high-voltage direct current 32, low
In the annexation and the first flexible transformer station 1 and the second flexible transformer station 2 of pressure AC system 33 and low-voltage direct-current system 34
The annexation of high-voltage alternating system, high-voltage direct current, low-voltage alternating-current system and low-voltage direct-current system is similar, operation principle and
The function of realization is also similar to, and will not be described here.
Wherein, the first voltage conversion module of each flexible transformer station and first voltage inverse transform module can be independent
Module, or the integrated module for integrating；Second voltage conversion module and second voltage inverse transform module can be with
It is independent module, or the integrated module for integrating；First power conversion modules are changed with the first power inverting
Module can be independent module, or the integrated module for integrating；Second power conversion modules and the second work(
Rate inverse transform module can be independent module, or the integrated module for integrating, with the first flexible transformer station 1
As a example by be illustrated：First voltage conversion module 19 and first voltage inverse transform module 10 can be independent modules, it is also possible to
It is integrated in integrated module together；Second voltage conversion module 124 can be independent with second voltage inverse transform module 142
Module, or the integrated module for integrating；First power conversion modules 15 and the first power inverting mold changing block 17
Can be the module, or the integrated module for integrating of independent design；In the same manner, the second power conversion modules 16 with
Second power inverting mold changing block 18 can be the module, or the integrated module for integrating of independent design, for
Voltage transformation module, voltage inverse transform module in second flexible transformer station 2 and the 3rd flexible transformer station 3, power conversion module
Acc power inverse transform block, is equally so designed that.
Flexible transformer station in this utility model is (soft including first the 1, second flexible transformer station 2 and the 3rd of flexible transformer station
Property transformer station 3), can pass through to control to adjust voltage, power and the phase place of high-voltage alternating system or low-voltage alternating-current system, equally, can
By the voltage for controlling to adjust high-voltage direct current or low-voltage direct-current system.
At the same time, the low-voltage alternating-current system and low-voltage direct-current system in the flexible transformer station in this utility model includes
Distributed power source, including wind power generation and solar electrical energy generation etc., low-voltage alternating-current system and/or low-voltage direct-current system direct access with
The electric energy that the distributed power source of its connection sends, so that directly use or standby are mutually converted.
Preferably, new forms of energy and energy-storage system are directly accessed in the high-voltage direct current in the present embodiment, especially in higher level
When electrical network suspension or other failures cause flexible transformer station obtain electric energy from higher level's electrical network and cannot work, directly provide
Electric energy, once to avoid higher level's electric network fault, AC-DC hybrid power grid from will be unable to the technological deficiency of work.
Meanwhile, distributed power source, storage are respectively connected in the low-voltage alternating-current system, low-voltage direct-current system in flexible transformer station
Can, for providing electric energy when higher level's electrical network powers failure.
At the same time, the flexible transformer station in the AC-DC hybrid power grid in the present embodiment can be with independent operating, it is also possible to
Connection composition serial-parallel power grid operation, the benefit of independent operating is one or several flexibility changes in AC-DC hybrid power grid
When power station is broken down, the flexible transformer station in AC-DC hybrid power grid in addition to the flexible transformer station broken down still can be with
Normal work, there is provided electric energy, expands the motility that AC-DC hybrid power grid is used to a great extent, reduces fault rate.
Flexible transformer station in this utility model also includes power conversion modules of the DC voltage conversion for alternating voltage, point
Not Wei the first power inverting mold changing block and the second power inverting mold changing block, be so designed that so that soft in AC-DC hybrid power grid
Any two system in high-voltage alternating system, high-voltage direct current, low-voltage alternating-current system, low-voltage direct-current system in property transformer station
Electric energy in system can be mutually converted with two-way flow.
In sum, the AC-DC hybrid power grid that this utility model builds, by arranging the first work(in flexible transformer station
Rate conversion module, the second power conversion modules, make flexible transformer station export High Level AC Voltage and can while low-voltage AC
To export high voltage direct current and low-voltage DC, at the same time, arrange in flexible transformer station the first power inverting mold changing block, the
Two power invertings mold changing block, first voltage inverse transform module and second voltage inverse transform module so that friendship of the present utility model is straight
The High Level AC Voltage in flexible transformer station, high voltage direct current, low-voltage AC and low-voltage DC in stream serial-parallel power grid is mutual
Conversion, efficiently solves existing power distribution network and can only provide alternating voltage, powering mode single technical problem, improve power distribution network
Motility and controllability.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And thus it is extended obvious change or
Among changing the protection domain created still in this utility model.
Claims (12)
1. a kind of AC-DC hybrid power grid, it is characterised in that include
Several flexible transformer stations, described each flexible transformer station include multiple electric pressure NETOMACs, it is described each
Flexible transformer station includes the part in high-voltage alternating system, high-voltage direct current, low-voltage alternating-current system, low-voltage direct-current system respectively
Or all, in flexible transformer station of institute, at least include high-voltage alternating system, high-voltage direct current, a low-voltage alternating-current
System and a low-voltage direct-current system；
High-voltage alternating system, high-voltage direct current in described each flexible transformer station, low-voltage alternating-current system, low-voltage direct-current system
Net is unified into respectively mutually.
2. AC-DC hybrid power grid according to claim 1, it is characterised in that the plurality of electric pressure NETOMAC bag
Include high-voltage alternating interface, HVDC interface, low-voltage alternating-current interface and low-voltage direct interface.
3. AC-DC hybrid power grid according to claim 1, it is characterised in that the high-voltage alternating system, HVDC system
Unite, to and fro flow of power is realized by flexible transformer station between low-voltage alternating-current system, low-voltage direct-current system any two.
4. AC-DC hybrid power grid according to claim 1, it is characterised in that the high-voltage alternating system of the flexible transformer station
And the voltage of the voltage, frequency and the equal scalable of phase place, the high-voltage direct current and low-voltage direct-current system of low-voltage alternating-current system
Scalable.
5. AC-DC hybrid power grid according to claim 3, it is characterised in that the high-voltage alternating system and low-voltage alternating-current system
First voltage conversion module and first voltage inverse transform module are provided between system, high pressure is handed over by the first voltage conversion module
Stream electricity is transformed to low-voltage AC, and low-voltage AC is transformed to High Level AC Voltage by the first voltage inverse transform module.
6. AC-DC hybrid power grid according to claim 5, it is characterised in that the high-voltage direct current and the low-pressure direct
It is provided with second voltage conversion module and second voltage inverse transform module in streaming system, the second voltage conversion module is by high pressure
DC power conversion is low-voltage DC, and low-voltage DC is transformed to high voltage direct current by the second voltage inverse transform module.
7. AC-DC hybrid power grid according to claim 6, it is characterised in that the high-voltage alternating system and the high straightening
The first power conversion modules and the first power inverting mold changing block are provided between streaming system, first power conversion modules are by height
Pressure convert alternating current is high voltage direct current, and high voltage direct current is transformed to High Level AC Voltage by the first power inverting mold changing block.
8. AC-DC hybrid power grid according to claim 7, it is characterised in that the low-voltage alternating-current system and the low-pressure direct
The second power conversion modules and the second power inverting mold changing block are provided between streaming system, second power conversion modules will be low
Pressure convert alternating current is low-voltage DC, and low-voltage DC is transformed to low-voltage AC by the second power inverting mold changing block.
9. AC-DC hybrid power grid according to claim 8, it is characterised in that the first voltage conversion module with it is described
First voltage inverse transform module is independent module or the integrated module to integrate, the second voltage conversion module
It is independent module or integrated module to integrate with the second voltage inverse transform module, first power becomes
It is independent module or the integrated module to integrate that mold changing block and first power inverting change the mold block, described second
It is independent module or the integrated module to integrate that power conversion modules and second power inverting change the mold block.
10. AC-DC hybrid power grid according to claim 1, it is characterised in that the high-voltage direct current is directly accessed newly
The energy and energy-storage system, for when higher level's electric network fault or it is abnormal when electric energy is provided.
11. AC-DC hybrid power grids according to claim 1, it is characterised in that the low-voltage alternating-current system, low-voltage direct system
System is respectively connected to distributed power source or energy storage device, for when higher level's electric network fault or it is abnormal when electric energy is provided.
12. AC-DC hybrid power grids according to claim 1, it is characterised in that in the AC-DC hybrid power grid, one or
Flexible change when the several flexible transformer stations of person break down, in AC-DC hybrid power grid in addition to the flexible transformer station broken down
Power station normal work.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666157A (en) * | 2016-07-22 | 2018-02-06 | 全球能源互联网研究院有限公司 | A kind of AC-DC hybrid power grid |
| CN108173269A (en) * | 2018-01-02 | 2018-06-15 | 全球能源互联网研究院有限公司 | A kind of flexibility multimode switch |
| CN108321805A (en) * | 2018-02-28 | 2018-07-24 | 全球能源互联网研究院有限公司 | A kind of micro-grid system |
| CN108418207A (en) * | 2018-02-28 | 2018-08-17 | 全球能源互联网研究院有限公司 | A kind of alternating current-direct current mixing micro-capacitance sensor system |
| CN109711089A (en) * | 2019-01-15 | 2019-05-03 | 清华大学 | Four port electric energy routers simplify modeling and simulating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107666157A (en) * | 2016-07-22 | 2018-02-06 | 全球能源互联网研究院有限公司 | A kind of AC-DC hybrid power grid |
| CN107666157B (en) * | 2016-07-22 | 2024-01-23 | 全球能源互联网研究院有限公司 | AC/DC series-parallel power grid |
| CN108173269A (en) * | 2018-01-02 | 2018-06-15 | 全球能源互联网研究院有限公司 | A kind of flexibility multimode switch |
| CN108321805A (en) * | 2018-02-28 | 2018-07-24 | 全球能源互联网研究院有限公司 | A kind of micro-grid system |
| CN108418207A (en) * | 2018-02-28 | 2018-08-17 | 全球能源互联网研究院有限公司 | A kind of alternating current-direct current mixing micro-capacitance sensor system |
| CN108418207B (en) * | 2018-02-28 | 2021-01-08 | 全球能源互联网研究院有限公司 | Alternating current-direct current hybrid micro-grid system |
| CN108321805B (en) * | 2018-02-28 | 2023-11-14 | 全球能源互联网研究院有限公司 | Micro-grid system |
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Address after: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Co-patentee after: State Grid Corporation of China Patentee after: Global energy Internet Institute, Inc. Address before: 102211 Beiqijia Town, Beijing, Changping District, future technology North Zone National Grid hospital Co-patentee before: State Grid Corporation of China Patentee before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE |