CN207124458U - A kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants - Google Patents
A kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants Download PDFInfo
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- CN207124458U CN207124458U CN201720655006.1U CN201720655006U CN207124458U CN 207124458 U CN207124458 U CN 207124458U CN 201720655006 U CN201720655006 U CN 201720655006U CN 207124458 U CN207124458 U CN 207124458U
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Abstract
The utility model embodiment discloses a kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants, the utility model embodiment uses uncontrollable rectifier bridge in wind farm side, significantly reduce the cost of flexible direct current system and the complexity of control, be advantageous to the access of more wind power plants, only require that the busbar voltage of wind power plant keeps stable, each inverter bridge can be independently controlled in grid side, without mutually coordinated, reduce the difficulty of control；The utility model embodiment is undertaken without inverter bridge electromagnetic compatibility, the high-voltage isulation the problems such as, and turns to be undertaken by transformer, is easy to Project Realization；Three-phase bridge inverter bridge and uncontrollable rectifier bridge in the utility model embodiment are simple in construction, technology maturation, can form modularization by standard production, reduce manufacturing cost.Whole transverter in design can Redundancy Design, switch to spare module in time when a module breaks down, improve system reliability.
Description
Technical field
It the utility model is related to wind power plant field, more particularly to a kind of flexible direct current access grid-connected suitable for more wind power plants
Transverter topology.
Background technology
The topology that existing flexible direct-current transmission converter uses has two kinds, and one kind is modular multilevel three-phase bridge, and one
Kind is the three-phase bridge of IGBT series connection.The former output waveform sine degree is high, and wave filter is set without another, but the element that needs of transverter compared with
More, control is more complicated；The latter's output waveform sine degree is not so good as the former, it is necessary to separately set wave filter, but element is less needed for transverter,
Compact-sized, control is relatively easy.Although component price has declined a lot, both topological transverters are used,
Cost is still significantly higher than the D.C. high voltage transmission based on IGCT, and limiting popularization of the flexible DC power transmission in wind-powered electricity generation field should
With.
Therefore it provides a kind of new flexible direct-current transmission converter topology meets that the needs of people is people in the art
Member's technical issues that need to address.
Utility model content
The utility model embodiment discloses a kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants,
The transverter is used in ± 160kV DC transmission systems, is adapted to more wind power plant accesses, simple, cost is relatively low with controlling
The advantages of.
The utility model embodiment provides a kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants,
Including：First inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit
Module, the first rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, the 4th rectification unit
Module, the first transformer, the second transformer ,+160kV DC lines and -160kV DC lines；
The first inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule,
The 4th inversion unit submodule is connected by the transformer with power network；
The first rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule,
The 4th rectification unit submodule is connected by the transformer with wind power plant bus；
The first inversion unit submodule connects with+160kV the DC lines；
The 4th inversion unit submodule connects with -160kV the DC lines；
The second inversion unit submodule, the 3rd inversion unit submodule and the earth connect.
The first rectification unit submodule connects with+160kV the DC lines；
The 4th rectification unit submodule connects with -160kV the DC lines；
The second rectification unit submodule, the 3rd rectification unit submodule and the earth connect.
Preferably, the first inversion unit submodule includes four the first controllable three phase inverter bridges；
The AC of four first controllable three phase inverter bridges is connected with the 10kV sides of first transformer；
The 20kV electric capacity of the DC side of four first controllable three phase inverter bridges is sequentially connected in series and+160kV the direct currents
Connection；
The 4th inversion unit submodule includes four the 4th controllable three phase inverter bridges；
The AC of four the 4th controllable three phase inverter bridges is connected with the 10kV sides of first transformer；
The 20kV electric capacity of the DC side of four the 4th controllable three phase inverter bridges is sequentially connected in series and -160kV the direct currents
Connection.
Preferably, the second inversion unit submodule includes four the second controllable three phase inverter bridges；
The AC of four second controllable three phase inverter bridges is connected with the 10kV sides of first transformer；
The 20kV electric capacity of the DC side of four second controllable three phase inverter bridges is sequentially connected in series to be connected with the earth；
The 3rd inversion unit submodule includes four the 3rd controllable three phase inverter bridges；
The AC of four the 3rd controllable three phase inverter bridges is connected with the 10kV sides of first transformer；
The 20kV electric capacity of the DC side of four the 3rd controllable three phase inverter bridges is sequentially connected in series to be connected with the earth；
Preferably, the first rectification unit submodule includes eight the first three-phase uncontrollable rectifier bridges；
The AC of eight the first three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；
The 10kV electric capacity of the DC side of eight the first three-phase uncontrollable rectifier bridges is sequentially connected in series and+160kV the direct currents
Connection；
The 4th rectification unit submodule includes eight the 4th three-phase uncontrollable rectifier bridges；
The AC of eight the 4th three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；
The 10kV electric capacity of the DC side of eight the 4th three-phase uncontrollable rectifier bridges is sequentially connected in series and -160kV the direct currents
Connection.
Preferably, the second rectification unit submodule includes eight the second three-phase uncontrollable rectifier bridges；
The AC of eight the second three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；
The 10kV electric capacity of the DC side of eight the second three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with the earth；
The 3rd rectification unit submodule includes eight the 3rd three-phase uncontrollable rectifier bridges；
The AC of eight the 3rd three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；
The 10kV electric capacity of the DC side of eight the 3rd three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with the earth.
Preferably, the 35kV sides of first transformer are connected with the power network.
Preferably, the 35kV sides of second transformer are connected with the wind power plant bus.
Preferably, the first inversion unit submodule is connected with the second inversion unit submodule；
The second inversion unit submodule is connected with the 3rd inversion unit submodule；
The 3rd inversion unit submodule is connected with the 4th inversion unit submodule.
Preferably, the first rectification unit submodule is connected with the second rectification unit submodule；
The second rectification unit submodule is connected with the 3rd rectification unit submodule；
The 3rd rectification unit submodule is connected with the 4th rectification unit submodule.
As can be seen from the above technical solutions, the utility model embodiment has advantages below：
The utility model embodiment provides a kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants,
Including：First inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit
Module, the first rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, the 4th rectification unit
Module, the first transformer, the second transformer ,+160kV DC lines and -160kV DC lines；First inversion unit
Module, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit submodule are logical
The transformer is crossed to connect with power network；The first rectification unit submodule, the second rectification unit submodule, the described 3rd
Rectification unit submodule, the 4th rectification unit submodule are connected by the transformer with wind power plant bus；Described first
Inversion unit submodule connects with+160kV the DC lines；The 4th inversion unit submodule and the -160kV direct currents
Connection；The second inversion unit submodule, the 3rd inversion unit submodule and the earth connect.First rectification
Unit submodule connects with+160kV the DC lines；The 4th rectification unit submodule and the -160kV DC lines
Connection；The second rectification unit submodule, the 3rd rectification unit submodule and the earth connect.The utility model embodiment
A kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants provided, the transverter are used for ± 160kV direct currents
In transmission system, it is adapted to more wind power plant accesses, there is the advantages of control is simple, cost is relatively low.
Further, the utility model embodiment uses uncontrollable rectifier bridge in wind farm side, significantly reduces flexible direct current system
The cost of system and the complexity of control, are advantageous to the access of more wind power plants, only require that the busbar voltage of wind power plant keeps stabilization i.e.
Can, each inverter bridge can be independently controlled in grid side, without mutually coordinated, reduce the difficulty of control；The utility model is real
Apply example to undertake without inverter bridge electromagnetic compatibility, the high-voltage isulation the problems such as, and turn to be undertaken by transformer, be easy to Project Realization；This
Three-phase bridge inverter bridge and uncontrollable rectifier bridge in utility model embodiment are simple in construction, technology maturation, can form modularization by mark
Quasi- production, reduces manufacturing cost.Whole transverter in design can Redundancy Design, switch in time when a module breaks down
To spare module, system reliability is improved.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flexible direct current transverter access grid-connected suitable for more wind power plants that the utility model embodiment provides
The structural representation of topology；
Fig. 2 is the structural representation of inversion unit submodule；
Fig. 3 is the structural representation of controllable three phase inverter bridge；
Fig. 4 is the structural representation of rectification unit submodule；
Fig. 5 is that the structure for not controlling three-phase commutation bridge attempts；
Fig. 6 connection relationship diagrams between inversion unit submodule.
Embodiment
The utility model embodiment discloses a kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants,
The transverter is used in ± 160kV DC transmission systems, is adapted to more wind power plant accesses, simple, cost is relatively low with controlling
The advantages of.
A kind of referring to Fig. 1, flexible direct current access grid-connected suitable for more wind power plants that the utility model embodiment provides
One embodiment of transverter topology, including：First inversion unit submodule, the second inversion unit submodule, the 3rd inversion list
First submodule, the 4th inversion unit submodule, the first rectification unit submodule, the second rectification unit submodule, the 3rd rectification list
First submodule, the 4th rectification unit submodule, the first transformer, the second transformer ,+160kV DC lines and -160kV direct currents
Circuit；
First inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit
Submodule is connected by transformer with power network；
First rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, the 4th rectification unit
Submodule is connected by transformer with wind power plant bus；
First inversion unit submodule connects with+160kV DC lines；
4th inversion unit submodule connects with -160kV DC lines；
Second inversion unit submodule, the 3rd inversion unit submodule and the earth connect.
First rectification unit submodule connects with+160kV DC lines；
4th rectification unit submodule connects with -160kV DC lines；
Second rectification unit submodule, the 3rd rectification unit submodule and the earth connect.
In the present embodiment, the first inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule
Block, the 4th inversion unit submodule are identical inversion unit submodule, herein with first, second, third and fourth be in order to
Prominent first inversion unit submodule location in the utility model embodiment with other three inversion unit submodules
(annexation), the function of rising are otherwise varied.Identical, the first rectification unit submodule, the second rectification unit submodule,
Three rectification unit submodules, the 4th rectification unit submodule are also identical rectification unit submodule, and the first transformer, second become
Depressor is also identical transformer.
The utility model embodiment provides a kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants,
The transverter is used in ± 160kV DC transmission systems, is adapted to more wind power plant accesses, simple, cost is relatively low with controlling
The advantages of.
Refer to Fig. 1 to Fig. 6, a kind of flexibility access grid-connected suitable for more wind power plants that the utility model embodiment provides
One embodiment of DC converter topology, including：
First inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit
Submodule, the first rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, the 4th rectification unit
Submodule, the first transformer, the second transformer ,+160kV DC lines and -160kV DC lines；
First inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit
Submodule is connected by transformer with power network；
First rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, the 4th rectification unit
Submodule is connected by transformer with wind power plant bus；
First inversion unit submodule connects with+160kV DC lines；
4th inversion unit submodule connects with -160kV DC lines；
Second inversion unit submodule, the 3rd inversion unit submodule and the earth connect.
First rectification unit submodule connects with+160kV DC lines；
4th rectification unit submodule connects with -160kV DC lines；
Second rectification unit submodule, the 3rd rectification unit submodule and the earth connect.
Further, the first inversion unit submodule includes four the first controllable three phase inverter bridges；
The AC of four the first controllable three phase inverter bridges is connected with the 10kV sides of the first transformer；
The 20kV electric capacity of the DC side of four the first controllable three phase inverter bridges is sequentially connected in series to be connected with+160kV DC lines；
4th inversion unit submodule includes four the 4th controllable three phase inverter bridges；
The AC of four the 4th controllable three phase inverter bridges is connected with the 10kV sides of the first transformer；
The 20kV electric capacity of the DC side of four the 4th controllable three phase inverter bridges is sequentially connected in series to be connected with -160kV DC lines.
Further, the second inversion unit submodule includes four the second controllable three phase inverter bridges；
The AC of four the second controllable three phase inverter bridges is connected with the 10kV sides of the first transformer；
The 20kV electric capacity of the DC side of four the second controllable three phase inverter bridges is sequentially connected in series to be connected with the earth；
3rd inversion unit submodule includes four the 3rd controllable three phase inverter bridges；
The AC of four the 3rd controllable three phase inverter bridges is connected with the 10kV sides of the first transformer；
The 20kV electric capacity of the DC side of four the 3rd controllable three phase inverter bridges is sequentially connected in series to be connected with the earth；
Further, the first rectification unit submodule includes eight the first three-phase uncontrollable rectifier bridges；
The AC of eight the first three-phase uncontrollable rectifier bridges is connected with the 10kV sides of the second transformer；
The 10kV electric capacity of the DC side of eight the first three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with+160kV DC lines；
4th rectification unit submodule includes eight the 4th three-phase uncontrollable rectifier bridges；
The AC of eight the 4th three-phase uncontrollable rectifier bridges is connected with the 10kV sides of the second transformer；
The 10kV electric capacity of the DC side of eight the 4th three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with -160kV DC lines.
Further, the second rectification unit submodule includes eight the second three-phase uncontrollable rectifier bridges；
The AC of eight the second three-phase uncontrollable rectifier bridges is connected with the 10kV sides of the second transformer；
The 10kV electric capacity of the DC side of eight the second three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with the earth；
3rd rectification unit submodule includes eight the 3rd three-phase uncontrollable rectifier bridges；
The AC of eight the 3rd three-phase uncontrollable rectifier bridges is connected with the 10kV sides of the second transformer；
The 10kV electric capacity of the DC side of eight the 3rd three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with the earth.
Further, the 35kV sides of the first transformer are connected with power network.
Further, the 35kV sides of the second transformer are connected with wind power plant bus.
In the application example, four inversion unit submodules being arranged in Inverter Station, and be arranged in converting plant
Four rectification unit submodules.
Each inversion unit submodule includes four controllable three phase inverter bridges, the AC point of four controllable three phase inverter bridges
Not Jie Ru Inverter Station transformer 10kV sides, Inverter Station transformer 35kV then accesses power network, as described above, in four inversion unit submodules
Block (i.e. the first inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit
Module) in, the DC side 20kV electric capacity of four the first controllable three phase inverter bridges is sequentially connected in series, access+160kV DC lines, and four
The DC side 20kV electric capacity of individual second controllable three phase inverter bridge is sequentially connected in series, access -160kV DC lines, four the 3rd three-phases
Inverter bridge is connected with four the 4th three phase inverter bridges with the earth polar (i.e. above-mentioned the earth) of DC line.
Each rectification unit submodule includes eight three-phase uncontrollable rectifier bridges, the AC point of eight three-phase uncontrollable rectifier bridges
Not Jie Ru converting plant transformer secondary 10kV sides, converting plant 35 kV-side of transformer is connected to wind power plant bus, as described above, at four
In rectification unit submodule (i.e. the first rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule,
4th rectification unit submodule passes through transformer), the DC side 10kV electric capacity of eight the first three-phase uncontrollable rectifier bridges is sequentially connected in series,
Access+160kV DC lines, the DC side 10kV electric capacity of eight the second three-phase uncontrollable rectifier bridges are sequentially connected in series, access -160kV
The DC side 10kV electric capacity of DC line, eight the 3rd three-phase uncontrollable rectifier bridges and eight the 4th three-phase uncontrollable rectifier bridges is gone here and there successively
Connection, the earth polar (i.e. above-mentioned the earth) with DC line are connected.
As shown in figure 3, three phase inverter bridge, using turn-off device, is made up of, three contraries IGBT and antiparallel diode
Become bridge control mode take DQ decoupling internal and external double-circular form current indirect control method, control targe be constant DC voltage and
Controllable reactive power, prior art is implemented as, it will not go into details for the utility model.The power supply of control loop is led to by 10kV buses
Transformer conversion is crossed to obtain.
As shown in figure 5, three-phase uncontrollable rectifier bridge, is formed using diode, controlled without using, directly by wind power plant 35kV
Bus carries out rectification.
Inverter Station side is connected with power network, and opposite side is connected with converting plant；Converting plant side is connected with Inverter Station, opposite side
It is connected with wind power plant.It should be noted that in Fig. 1, depict two wind power plant connections, that is, have A wind power plants and B wind power plants,
Liang Ge converting plants are then also depicted in figure, each converting plant is actual to include four rectification unit submodules.
Further, the first inversion unit submodule is connected with the second inversion unit submodule；
Second inversion unit submodule is connected with the 3rd inversion unit submodule；
3rd inversion unit submodule is connected with the 4th inversion unit submodule.
Further, the first rectification unit submodule is connected with the second rectification unit submodule；
Second rectification unit submodule is connected with the 3rd rectification unit submodule；
3rd rectification unit submodule is connected with the 4th rectification unit submodule.
As shown in fig. 6, herein Fig. 6 by taking inversion unit submodule as an example, annexation between rectification unit submodule with
Annexation between inversion unit submodule is consistent.Between first inversion unit submodule and the second inversion unit submodule
Connection is by the one of DC side 20kV electric capacity and the second inversion unit submodule in the first inversion unit submodule
What one of DC side 20kV electric capacity was attached.Another DC side 20kV electric capacity (area of second inversion unit submodule
The DC side 20kV electric capacity not being connected in the second inversion unit submodule with the first inversion unit submodule) and the 3rd inversion unit
One of DC side 20kV capacitance connections of submodule, and access the earth.Similarly the 4th inversion unit submodule and the 3rd inverse
The annexation for becoming unit submodule no longer repeats repeatedly.
In Fig. 1, remaining wind power plant equally accesses similar to B wind power plants, and access point is DC loop+160kV circuits
And -160kV circuits.It is identical that DC loop, which includes+160kV circuits, -160kV circuits and earth polar (zero potential), ground potential,
So each wind power plant need not link together.
A kind of flexible direct current transverter access grid-connected suitable for more wind power plants provided by the utility model is opened up above
Flutter and be described in detail, for those of ordinary skill in the art, according to the thought of the utility model embodiment, specific real
There will be changes in mode and application are applied, in summary, this specification content should not be construed as to the utility model
Limitation.
Claims (9)
- A kind of 1. flexible direct current transverter topology access grid-connected suitable for more wind power plants, it is characterised in that including：First inversion Unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, the 4th inversion unit submodule, the first rectification Unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, the 4th rectification unit submodule, the first transformation Device, the second transformer ,+160kV DC lines and -160kV DC lines；It is the first inversion unit submodule, the second inversion unit submodule, the 3rd inversion unit submodule, described 4th inversion unit submodule is connected by the transformer with power network；It is the first rectification unit submodule, the second rectification unit submodule, the 3rd rectification unit submodule, described 4th rectification unit submodule is connected by the transformer with wind power plant bus；The first inversion unit submodule connects with+160kV the DC lines；The 4th inversion unit submodule connects with -160kV the DC lines；The second inversion unit submodule, the 3rd inversion unit submodule and the earth connect；The first rectification unit submodule connects with+160kV the DC lines；The 4th rectification unit submodule connects with -160kV the DC lines；The second rectification unit submodule, the 3rd rectification unit submodule and the earth connect.
- 2. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 1, its feature exist In the first inversion unit submodule includes four the first controllable three phase inverter bridges；The AC of four first controllable three phase inverter bridges is connected with the 10kV sides of first transformer；The 20kV electric capacity of the DC side of four first controllable three phase inverter bridges is sequentially connected in series and+160kV the DC lines Connection；The 4th inversion unit submodule includes four the 4th controllable three phase inverter bridges；The AC of four the 4th controllable three phase inverter bridges is connected with the 10kV sides of first transformer；The 20kV electric capacity of the DC side of four the 4th controllable three phase inverter bridges is sequentially connected in series and -160kV the DC lines Connection.
- 3. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 2, its feature exist In the second inversion unit submodule includes four the second controllable three phase inverter bridges；The AC of four second controllable three phase inverter bridges is connected with the 10kV sides of first transformer；The 20kV electric capacity of the DC side of four second controllable three phase inverter bridges is sequentially connected in series to be connected with the earth；The 3rd inversion unit submodule includes four the 3rd controllable three phase inverter bridges；The AC of four the 3rd controllable three phase inverter bridges is connected with the 10kV sides of first transformer；The 20kV electric capacity of the DC side of four the 3rd controllable three phase inverter bridges is sequentially connected in series to be connected with the earth.
- 4. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 3, its feature exist In the first rectification unit submodule includes eight the first three-phase uncontrollable rectifier bridges；The AC of eight the first three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；The 10kV electric capacity of the DC side of eight the first three-phase uncontrollable rectifier bridges is sequentially connected in series and+160kV the DC lines Connection；The 4th rectification unit submodule includes eight the 4th three-phase uncontrollable rectifier bridges；The AC of eight the 4th three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；The 10kV electric capacity of the DC side of eight the 4th three-phase uncontrollable rectifier bridges is sequentially connected in series and -160kV the DC lines Connection.
- 5. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 4, its feature exist In the second rectification unit submodule includes eight the second three-phase uncontrollable rectifier bridges；The AC of eight the second three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；The 10kV electric capacity of the DC side of eight the second three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with the earth；The 3rd rectification unit submodule includes eight the 3rd three-phase uncontrollable rectifier bridges；The AC of eight the 3rd three-phase uncontrollable rectifier bridges is connected with the 10kV sides of second transformer；The 10kV electric capacity of the DC side of eight the 3rd three-phase uncontrollable rectifier bridges is sequentially connected in series to be connected with the earth.
- 6. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 5, its feature exist In the 35kV sides of first transformer are connected with the power network.
- 7. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 6, its feature exist In the 35kV sides of second transformer are connected with the wind power plant bus.
- 8. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 1, its feature exist In the first inversion unit submodule is connected with the second inversion unit submodule；The second inversion unit submodule is connected with the 3rd inversion unit submodule；The 3rd inversion unit submodule is connected with the 4th inversion unit submodule.
- 9. the flexible direct current transverter topology access grid-connected suitable for more wind power plants according to claim 8, its feature exist In the first rectification unit submodule is connected with the second rectification unit submodule；The second rectification unit submodule is connected with the 3rd rectification unit submodule；The 3rd rectification unit submodule is connected with the 4th rectification unit submodule.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655006.1U CN207124458U (en) | 2017-06-07 | 2017-06-07 | A kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655006.1U CN207124458U (en) | 2017-06-07 | 2017-06-07 | A kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants |
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| Publication Number | Publication Date |
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| CN207124458U true CN207124458U (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720655006.1U Withdrawn - After Issue CN207124458U (en) | 2017-06-07 | 2017-06-07 | A kind of flexible direct current transverter topology access grid-connected suitable for more wind power plants |
Country Status (1)
| Country | Link |
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| CN (1) | CN207124458U (en) |
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2017
- 2017-06-07 CN CN201720655006.1U patent/CN207124458U/en not_active Withdrawn - After Issue
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