CN209389721U - Flexible direct current current converter and system - Google Patents
Flexible direct current current converter and system Download PDFInfo
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- CN209389721U CN209389721U CN201920201512.2U CN201920201512U CN209389721U CN 209389721 U CN209389721 U CN 209389721U CN 201920201512 U CN201920201512 U CN 201920201512U CN 209389721 U CN209389721 U CN 209389721U
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- 238000010586 diagram Methods 0.000 description 3
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
It includes: three change of current modules that the utility model, which provides a kind of flexible direct current current converter and system, the device,；The bus rod at change of current module connection exchange end, carries out the change of current to the alternating current at exchange end and exports direct current；Wherein, each change of current module includes: a bridge arm split reactor, positive arm converter valve, negative bridge arm converter valve；The bus rod at alternating current end connects bridge arm split reactor；The anode connection positive arm converter valve of bridge arm split reactor, the cathode of bridge arm split reactor connect negative bridge arm converter valve.The utility model provides a kind of flexible direct current current converter and system, split reactor is connected directly to the bus rod at alternating current end, by a split reactor instead of original two bridge arm reactors, under the premise of not influencing flexible direct current converter station existing capability, the flexible direct current converter station change of current area mode of connection is simplified, reactor arrangement quantity is reduced, saves construction investment, the land occupation of converter station DC fields is saved, comprehensive benefit is significant.
Description
Technical field
The utility model relates to project of transmitting and converting electricity design and construction technical field more particularly to a kind of flexible direct current current converters
And system.
Background technique
Flexible DC transmission is the technology of the D.C. high voltage transmission based on voltage source converter, by full-control type power electronic device
Part composition.Flexible DC transmission is in island power supply, the capacity-increasing transformation of urban power distribution network, AC system interconnection, large-scale wind power field
It is grid-connected etc. that there is stronger technical advantage, it is the strategic choice for changing power network development pattern.Flexible direct current converter station is soft
Property DC transmission system in important component, it plays the role of connecting flexible direct current system and AC system.It is flexible
DC converter station is coupled area, the regions such as valve hall and DC fields composition by alternating-current field.
Bridge arm reactor (valve reactor) is arranged in converter valve bridge arm, and main function is to inhibit ring between bridge arm change of current valve group
Stream.In conventional flexible DC converter station main electrical scheme system, bridge arm reactor (valve reactor) is arranged in converter valve exchange side, often
A bridge arm has a bridge arm reactor, and totally six.The wiring of conventional flexible DC converter station as shown in Figure 4, converter valve such as Fig. 4
Middle label is 1. shown.Every converter station shares 6 bridge arm reactors (valve reactor), is arranged in converter valve exchange side, bridge arm reactance
Device is as 2. shown such as label in Fig. 2.
Therefore, it how under the premise of not influencing flexible direct current converter station existing capability, reduces bridge arm reactor to the greatest extent and sets
Standby resource becomes problem to be solved in the prior art.
Utility model content
In order to simplify flexible direct current converter station wiring side under the premise of not influencing flexible direct current converter station existing capability
Formula, the utility model provide a kind of flexible direct current current converter and system.
In a first aspect, the utility model provides a kind of flexible direct current current converter, which includes: three change of current moulds
Block；The bus rod at the change of current module connection exchange end, carries out the change of current to the alternating current at exchange end and exports direct current；Wherein,
Each change of current module includes: a bridge arm split reactor, positive arm converter valve, negative bridge arm converter valve；
The bus rod at alternating current end connects the bridge arm split reactor；
The anode of the bridge arm split reactor connects the positive arm converter valve, the cathode connection of bridge arm split reactor
The negative bridge arm converter valve.
Further, the cathode of the positive arm converter valve in each change of current module is connected to the negative of DC output end
Pole；
The anode of negative bridge arm converter valve in each change of current module is connected to the anode of DC output end.
Further, smoothing reactor is respectively set on the cathode of the DC output end and anode.
Second aspect, the utility model provide a kind of flexible direct current commutation system, which includes: transformer and flexibility
DC converter device；
Wherein, the transformer connects the flexible direct current current converter；
The flexible direct current current converter includes: three change of current modules；Change of current module connection transformer alternating end
Bus rod carries out the change of current to the alternating current at exchange end and exports direct current；Wherein, each change of current module includes: a bridge arm division
Reactor, positive arm converter valve, negative bridge arm converter valve；
The bus rod at alternating current end connects the bridge arm split reactor；
The anode of the bridge arm split reactor connects the positive arm converter valve, the cathode connection of bridge arm split reactor
The negative bridge arm converter valve.
Further, further includes: switch；
Wherein, the transformer connects the flexible direct current current converter by the switch.
Further, the cathode of the positive arm converter valve in each change of current module is connected to the negative of DC output end
Pole；
The anode of negative bridge arm converter valve in each change of current module is connected to the anode of DC output end.
Further, smoothing reactor is respectively set on the cathode of the DC output end and anode.
Split reactor is connected directly to the bus rod at alternating current end by the utility model, and You Yitai split reactor replaces
For original two bridge arm reactors, under the premise of not influencing flexible direct current converter station existing capability, simplify flexible straight
The converter station change of current area mode of connection is flowed, reactor arrangement quantity is reduced, saves construction investment, converter station DC fields is saved and accounts for
Ground, comprehensive benefit are significant.
For the above and other objects, features and advantages of the utility model can be clearer and more comprehensible, preferable reality is cited below particularly
Example is applied, and cooperates institute's accompanying drawings, is described in detail below.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is change of current module frame chart provided by the embodiment of the utility model；
Fig. 2 is DC converter device block diagram provided by the embodiment of the utility model；
Fig. 3 is flexible direct current commutation system figure provided by the embodiment of the utility model；
Fig. 4 is the wiring schematic diagram of conventional flexible DC converter station.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Flexible HVDC transmission system can independently change the phase and amplitude of its output voltage, to easily and quickly adjust
Its active and reactive power exported.The technology of transmission of electricity have can to passive network power, be not in commutation failure, converter station
Between without communication and the advantages that be readily configured MTDC transmission system, and stability of power system can be improved, increases system
Dynamic reactive deposit improves power quality, solves the influence of nonlinear-load, impact load to system, ensures sensitive equipment
Power supply etc. all has stronger technical advantage.Converter station refers in HVDC transmission system, in order to complete will to exchange
Electricity is transformed to direct current or is alternating current by DC power conversion, and reaches the electric system of safety and stability and the website established.
Existing flexible direct current converter station is the important component in flexible HVDC transmission system, it plays connection flexible direct current system
The effect of system and AC system.But flexible direct current converter station, when being transmitted electricity, system loss becomes larger, because of reactor arrangement number
Amount is more, also increases construction investment, to solve the above-mentioned problems, the utility model embodiment provides a kind of flexible direct current change of current
Device and system.
The utility model embodiment provides a kind of flexible direct current current converter, which includes change of current module, the change of current
The bus rod at module connection exchange end, carries out the change of current to the alternating current at exchange end and exports direct current；Wherein, change of current module packet
It includes: a bridge arm split reactor, positive arm converter valve, negative bridge arm converter valve；
The bus rod at alternating current end connects the bridge arm split reactor；
The anode of the bridge arm split reactor connects the positive arm converter valve, the cathode connection of bridge arm split reactor
The negative bridge arm converter valve.
Specifically, as shown in FIG. 1, FIG. 1 is change of current module frame chart provided by the embodiment of the utility model, a bridge arm in figure
Split reactor indicates that is be connected with the split reactor left side is the bus rod at alternating current end with number 3.Positive arm is changed
Stream valve number 1 indicates, negative bridge arm converter valve number 6 indicates that there are diodes in positive arm converter valve, and diode is just
Pole, cathode use alphabetical a, b to indicate respectively；It can be seen from the figure that wherein split reactor 3 is being connected to positive arm stream valve 1 just
Pole, split reactor 3 are connected to the cathode of negative bridge arm converter valve 6.
Split reactor by being connected directly to the bus rod at alternating current end by the utility model embodiment, by one point
Split reactor instead of original two bridge arm reactors, under the premise of not influencing flexible direct current converter station existing capability, letter
Change the flexible direct current converter station change of current area mode of connection, reduced reactor arrangement quantity, saved construction investment, saves converter station
DC fields land occupation, comprehensive benefit are significant.
Content based on the above embodiment, as a kind of alternative embodiment: flexible direct current current converter includes three changes of current
The cathode of positive arm converter valve in each change of current module is connected to the cathode of DC output end by module；
The anode of negative bridge arm converter valve in each change of current module is connected to the anode of DC output end.
Specifically, as shown in Fig. 2, Fig. 2 is DC converter device block diagram provided by the embodiment of the utility model, by each change of current
The cathode of positive arm converter valve in module is connected, and is connected to the cathode of DC output end later, such as 8 institute of number in figure
Show: the cathode of the positive arm converter valve in each change of current module is attached by connecting line 8, then connecting line 8 is connected to direct current
The cathode at electricity output end；The anode of negative bridge arm converter valve in each change of current module is connected, is connected to direct current electricity output later
The anode at end, as shown in the number 9 in figure: the anode of the negative bridge arm converter valve in each change of current module is connected by connecting line 9
It connects, then connecting line 9 is connected to the anode of DC output end.
The utility model embodiment by by each change of current module positive arm converter valve cathode and negative bridge arm converter valve just
Pole is respectively connected to the cathode and anode of DC output end, achievees the effect that quickly to exchange electricity output direct current.
Content based on the above embodiment, as a kind of alternative embodiment: on the cathode and anode of DC output end
Smoothing reactor is respectively set.
Specifically, as shown in Fig. 2, number 7 indicates smoothing reactor in figure, it can be seen from the figure that in direct current electricity output
Smoothing reactor is respectively set on the cathode and anode at end, there are two smoothing reactors altogether.Wherein, smoothing reactor is used for direct current
Sending end makes the direct current of output close to ideal DC.
The utility model embodiment can effectively inhibit the direct current of output by the way that smoothing reactor is arranged in DC output end
Ripple in voltage, so that the direct current of output reduces DC line bring unstability close to ideal DC.
Other side according to the present utility model, the utility model embodiment also provide a kind of flexible direct current change of current system
System, which includes: transformer and flexible direct current current converter；
Wherein, transformer connects flexible direct current current converter；
Flexible direct current current converter includes: three change of current modules；Change of current module connects the bus rod at transformer alternating end,
The change of current is carried out to the alternating current at exchange end and exports direct current；Wherein, each change of current module includes: bridge arm split reactor, just
Bridge arm converter valve, negative bridge arm converter valve；
The bus rod at alternating current end connects the bridge arm split reactor；
The anode of the bridge arm split reactor connects the positive arm converter valve, the cathode connection of bridge arm split reactor
The negative bridge arm converter valve.
Specifically, as shown in figure 3, Fig. 3 is flexible direct current commutation system figure provided by the embodiment of the utility model, Tu Zhongbao
It includes, transformer and flexible direct current current converter, transformer indicates that transformer is connected with flexible direct current current converter by number 11
It connects, which is indicated in figure by number 10, wherein the flexible direct current current converter 10 includes: three
Change of current module, and each change of current module includes: a bridge arm split reactor, positive arm converter valve, negative bridge arm converter valve.Wherein,
One split reactor indicates that positive arm converter valve number 1 indicates, negative bridge arm converter valve number 6 is indicated with number 3.
In entire flexible direct current commutation system, there are three split reactors, three groups of positive and negative bridge arm converter valves altogether.In addition,
Within the system, entire change of current valve portion can also be indicated by number 13 in figure, represent converter valves all within the system.?
In figure, what is be connected with the split reactor left side is the bus rod at alternating current end, and split reactor 3 is connected to the positive arm change of current
The anode of valve 1, split reactor 3 are connected to the cathode of negative bridge arm converter valve 6.
Split reactor is connected directly to the bus rod at alternating current end by the utility model embodiment, by a division electricity
Anti- device simplifies under the premise of not influencing flexible direct current converter station existing capability instead of original two bridge arm reactors
The flexible direct current converter station change of current area mode of connection reduces reactor arrangement quantity, saves construction investment, saves converter station direct current
Field land occupation, comprehensive benefit are significant.
Content based on the above embodiment, as a kind of alternative embodiment: further include: switch；
Wherein, transformer passes through switch connection flexible direct current current converter.
Specifically, as shown in figure 3, switch is by 12 expression of number in figure, it can be seen from the figure that transformer 11 is by opening
What pass 12 was connect with flexible direct current current converter 10.
The utility model embodiment provides power supply for the starting of flexible direct current current converter, so that two bridge arms share one point
Reactor is split, has not only retained it and has inhibited circulation function between bridge arm change of current valve group, but also do not influenced flexible direct current converter station existing capability
Under the premise of, simplify the flexible direct current converter station mode of connection.
Content based on the above embodiment, as a kind of alternative embodiment: by the positive arm converter valve in each change of current module
Cathode be connected to the cathode of DC output end；
The anode of negative bridge arm converter valve in each change of current module is connected to the anode of DC output end.
Specifically, the cathode of the positive arm converter valve in change of current module each in system is connected, it is connected to direct current later
The cathode at electricity output end, as shown in the number 8 in Fig. 3, the cathode of the positive arm converter valve in each change of current module passes through connecting line 8
It is attached, then connecting line 8 is connected to the cathode of DC output end；Just by the negative bridge arm converter valve in each change of current module
Pole is connected, and is connected to the anode of DC output end later, the negative bridge arm as shown in the number 9 in figure, in each change of current module
The anode of converter valve is attached by connecting line 9, then connecting line 9 is connected to the anode of DC output end.
The utility model embodiment by by each change of current module positive arm converter valve cathode and negative bridge arm converter valve just
Pole is respectively connected to the cathode and anode of DC output end, achievees the effect that quickly to exchange electricity output direct current.
Content based on the above embodiment, as a kind of alternative embodiment: on the cathode and anode of DC output end
Smoothing reactor is respectively set.
Specifically, as shown in figure 3, number 7 indicates smoothing reactor in figure, it can be seen from the figure that in direct current electricity output
Smoothing reactor is respectively set on the cathode and anode at end, there are two smoothing reactors altogether.Wherein, smoothing reactor is used for direct current
Sending end makes the direct current of output close to ideal DC.
The utility model embodiment can effectively inhibit the direct current of output by the way that smoothing reactor is arranged in DC output end
Ripple in voltage, so that the direct current of output reduces DC line bring unstability close to ideal DC.
Specific embodiment is applied in the utility model to be expounded the principles of the present invention and embodiment, with
The explanation of upper embodiment is merely used to help understand the method and its core concept of the utility model；Meanwhile for this field
Those skilled in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application range, comprehensive
Upper described, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. a kind of flexible direct current current converter, which is characterized in that described device includes: three change of current modules；The change of current module
The bus rod at connection exchange end, carries out the change of current to the alternating current at exchange end and exports direct current；Wherein, each change of current module includes:
One bridge arm split reactor, positive arm converter valve, negative bridge arm converter valve；
The bus rod at alternating current end connects the bridge arm split reactor；
The anode of the bridge arm split reactor connects the positive arm converter valve, described in the cathode connection of bridge arm split reactor
Negative bridge arm converter valve.
2. the apparatus according to claim 1, which is characterized in that by the negative of the positive arm converter valve in each change of current module
Pole is connected to the cathode of DC output end；
The anode of negative bridge arm converter valve in each change of current module is connected to the anode of DC output end.
3. the apparatus of claim 2, which is characterized in that on the cathode and anode of the DC output end respectively
Smoothing reactor is set.
4. a kind of flexible direct current commutation system, which is characterized in that the system comprises: transformer and flexible direct current current converter；
Wherein, the transformer connects the flexible direct current current converter；
The flexible direct current current converter includes: three change of current modules；The confluence at change of current module connection transformer alternating end
Bus carries out the change of current to the alternating current at exchange end and exports direct current；Wherein, each change of current module includes: a bridge arm division reactance
Device, positive arm converter valve, negative bridge arm converter valve；
The bus rod at alternating current end connects the bridge arm split reactor；
The anode of the bridge arm split reactor connects the positive arm converter valve, described in the cathode connection of bridge arm split reactor
Negative bridge arm converter valve.
5. system according to claim 4, which is characterized in that further include: switch；
Wherein, the transformer connects the flexible direct current current converter by the switch.
6. system according to claim 4, which is characterized in that by the negative of the positive arm converter valve in each change of current module
Pole is connected to the cathode of DC output end；
The anode of negative bridge arm converter valve in each change of current module is connected to the anode of DC output end.
7. system according to claim 6, which is characterized in that on the cathode and anode of the DC output end respectively
Smoothing reactor is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920201512.2U CN209389721U (en) | 2019-02-15 | 2019-02-15 | Flexible direct current current converter and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920201512.2U CN209389721U (en) | 2019-02-15 | 2019-02-15 | Flexible direct current current converter and system |
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| CN209389721U true CN209389721U (en) | 2019-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672208A (en) * | 2019-02-15 | 2019-04-23 | 国网冀北电力有限公司经济技术研究院 | Flexible direct current current converter and system |
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- 2019-02-15 CN CN201920201512.2U patent/CN209389721U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672208A (en) * | 2019-02-15 | 2019-04-23 | 国网冀北电力有限公司经济技术研究院 | Flexible direct current current converter and system |
| CN109672208B (en) * | 2019-02-15 | 2024-03-26 | 国网冀北电力有限公司经济技术研究院 | Flexible direct current converter device and system |
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