CN203278258U - Series connection multiterminal high-voltage direct current transmission system and converter station - Google Patents
Series connection multiterminal high-voltage direct current transmission system and converter station Download PDFInfo
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- CN203278258U CN203278258U CN 201320267045 CN201320267045U CN203278258U CN 203278258 U CN203278258 U CN 203278258U CN 201320267045 CN201320267045 CN 201320267045 CN 201320267045 U CN201320267045 U CN 201320267045U CN 203278258 U CN203278258 U CN 203278258U
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- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000009499 grossing Methods 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims description 122
- 230000005764 inhibitory process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
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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
The utility model provides a series connection multiterminal high-voltage direct current transmission system and a converter station. The system comprises at least a converter station. Each converter station comprises a capacitor, a converter transformer enabling connection to an alternate current electrical network, a converter valve connected with the converter transformer, and a grounding grid. The capacitor is connected between the direct current end of the converter station and the grounding grid of the converter station. Since the capacitor is used, an anti-thunder function of smoothing reactors that are disposed inside the conventional converter station and in series connection with the converter valve is replaced by the capacitor, so that the number of the smoothing reactors is reduced, and complexity and cost of the converter station is reduced.
Description
Technical field
The utility model relates to HVDC Transmission Technology, more particularly, relates to series connection multiterminal HVDC transmission system and current conversion station thereof.
Background technology
Compare with multiterminal HVDC system in parallel, the series connection multiterminal HVDC system more is applicable to along the line the taking out of high voltage direct current and can uses.Yet the series connection multiterminal HVDC system is more easily realized the trend reverse turn operation; For the shorter situation of adjacent current conversion station distance, series connection multiterminal HVDC system total cost is lower.In general, the current conversion station of series connection multiterminal HVDC system has different working voltages.Fig. 1 illustrates existing series connection multiterminal HVDC system.As shown in Figure 1, rectification current conversion station R2 and inversion current conversion station I2 have higher working voltage and insulation level than rectification current conversion station R1 and inversion current conversion station I1.These characteristics is brought following challenge for the design of series connection multiterminal HVDC system: the insulation coordination problem of current conversion station.
The allocation plan based on the two ends high-voltage direct current that existing series connection multiterminal HVDC system major loop solution proposes, wherein the configuration of low-voltage current conversion station and traditional two ends current conversion station configure that to there is no essence different; The allocation plan of high voltage current conversion station has comprised the smoothing reactor of converter valve both sides placement, is connected in the neutral line bus-tie circuit breaker between low-voltage direct-current circuit and the neutral line in parallel, is used for the isolating switch of dc flat-wave reactor and DC filter bypass etc.The allocation plan complicated operation of this scheme high voltage appearance current conversion station, cost is higher.
The utility model content
For above-mentioned technical problem, the utility model provides a kind of series connection multiterminal HVDC transmission system, comprising: at least one current conversion station; Described current conversion station comprises: capacitor; Can be connected to the converter transformer of AC network; Be connected to the converter valve of described converter transformer; And ground network; Wherein: connect described capacitor between the ground network of the dc terminal of described current conversion station and described current conversion station.
According to another aspect of the present utility model, a kind of current conversion station for the series connection multiterminal HVDC transmission system is provided, comprising: the converter transformer that can be connected to AC network; Be connected to the converter valve of described converter transformer; Capacitor; And ground network; Wherein: connect described capacitor between the ground network of the dc terminal of described current conversion station and described current conversion station.
Owing to adopting capacitor, it has substituted the smoothing reactor of connecting with converter valve in traditional current conversion station and has prevented the effect of being struck by lightning on function, this reduced current conversion station smoothing reactor quantity and reduced complexity and the cost of current conversion station.
Description of drawings
Fig. 1 illustrates existing series connection multiterminal HVDC system;
Fig. 2 illustrates the high-voltage convertor station according to the series connection multiterminal HVDC transmission system of an embodiment of the present utility model;
Fig. 3 illustrates the one pole series connection multiterminal HVDC transmission system that adopts according to current conversion station shown in Figure 2; With
Fig. 4 illustrates the bipolar series multiterminal HVDC transmission system that adopts according to current conversion station shown in Figure 2.
Embodiment
Fig. 2 illustrates the high-voltage convertor station according to the series connection multiterminal HVDC transmission system of an embodiment of the present utility model.As shown in Figure 2, current conversion station 2 comprises: converter transformer 20, the converter valve 21 that is connected to converter transformer 20, capacitor 22 and ground network 23 wherein connect capacitor 22 between the ground network 23 of the dc terminal 24 of current conversion station 2 and current conversion station 2.Electrical network can be to the voltage that AC energy and converter transformer 20 changes these AC energy of presenting of converter transformer 20, such as boosting, and realize exchanging in transmission system and direct current between electrical isolation.Electric energy after converter transformer 20 conversion inputs to converter valve 21, and it realizes the conversion of AC to DC; According to different operating modes, the electric energy that converter valve 20 also can be transmitted DC line exports AC network to after converter transformer 20 conversion, realize the conversion of the interchange of direct current.Capacitor 20 can be connected with earth electrode by ground network 23, and it can suppress harmonic voltage or the Overvoltage Amplitude at dc terminal 24 places of current conversion station 2, prevents that harmonic voltage or overvoltage are to the harm of converter valve 21 thereby play; The overvoltage of for example, being struck by lightning and producing.
Owing to adopting capacitor, it has substituted the smoothing reactor of connecting with converter valve in traditional current conversion station and has prevented the effect of being struck by lightning on function, this reduced current conversion station smoothing reactor quantity and reduced complexity and the cost of current conversion station.
Best, current conversion station 2 also comprises smoothing reactor 25, and it is connected between dc low-voltage end 241 in the dc terminal 24 of the converter valve 21 of current conversion station 2 and current conversion station 2.Smoothing reactor is used for the harmonic wave of smooth direct current electric current, avoids the interrupted of direct current.Smoothing reactor can also suppress the climbing speed by the overcurrent of DC line or DC equipment generation.Certainly, smoothing reactor 25 also can be connected between high direct voltage end 240 in the dc terminal 24 of the converter valve 21 of current conversion station 2 and current conversion station 2.
Best, in order to satisfy simultaneously for the inhibition of overvoltage/voltage harmonic with for the inhibition of current harmonics, connect smoothing reactor 25 between the high direct voltage end 240 of the converter valve 21 of current conversion station 2 and current conversion station 2, and connect electric capacity 22 between the ground network 23 of the dc low-voltage end 241 of current conversion station 2 and current conversion station 2.Certainly, connect electric capacity 22 between high direct voltage end 240 that also can current conversion station 2 and the ground network 23 of current conversion station 2.
Best, in order further to suppress the overvoltage that thunderbolt causes, connect lightning arrester 26 between the ground network 23 of the dc terminal 24 of current conversion station 2 and current conversion station 2.
Fig. 3 illustrates the one pole series connection multiterminal HVDC transmission system that adopts according to current conversion station shown in Figure 2.As shown in Figure 3, one pole series connection multiterminal HVDC transmission system 3 comprises: DC power transmission line 30, low-pressure end current conversion station 31 and the high-pressure side current conversion station 32 of connecting with low-pressure end current conversion station 31 by DC power transmission line 30, and wherein the converter transformer of low-pressure end current conversion station 31 can be connected to the first AC network; And the converter transformer of high-pressure side current conversion station 32 can be connected to the second AC network.As shown in Figure 3, high-pressure side current conversion station 32 employings current conversion station 2 as shown in Figure 2.
Fig. 4 illustrates the bipolar series multiterminal HVDC transmission system that adopts according to current conversion station shown in Figure 2.As shown in Figure 4, bipolar series multiterminal HVDC transmission system 4 comprises: DC power transmission line 40, side of the positive electrode low-pressure end current conversion station 41, negative side low-pressure end current conversion station 42, side of the positive electrode high-pressure side current conversion station 43 and negative side high-pressure side current conversion station 44.The dc low-voltage end that the dc low-voltage end of side of the positive electrode low-pressure end current conversion station 41 is connected with negative side low-pressure end current conversion station connects; The high direct voltage end of the dc low-voltage end of side of the positive electrode high-pressure side current conversion station 43 and side of the positive electrode low-pressure end current conversion station 41 is by the anodal connection of DC line 40; The high direct voltage end of the dc low-voltage end of negative side high-pressure side current conversion station 44 and negative side low-pressure end current conversion station 42 is by the negative pole connection of DC line 40.Wherein, side of the positive electrode high-pressure side current conversion station 43 and negative side high-pressure side current conversion station 44 adopt respectively current conversion station 2 as shown in Figure 2.
Because above-mentioned one pole series connection multiterminal HVDC transmission system and bipolar series multiterminal HVDC transmission system have adopted current conversion station according to embodiment of the present utility model, it brings following advantage at least:
This reduced current conversion station smoothing reactor quantity and reduced complexity and the cost of current conversion station;
Harmonic wave in the smooth direct current electric current is avoided the interrupted of direct current; Prevent from entering converter valve by the overcurrent that DC line or DC equipment produce;
Satisfy simultaneously for the inhibition of overvoltage/voltage harmonic with for the inhibition of current harmonics; With
Lightning arrester further suppresses the overvoltage of being struck by lightning and causing.
Although illustrate and described the utility model with reference to some preferred embodiment of the present utility model, but it will be appreciated by those skilled in the art that, in the situation that do not deviate from the spirit and scope of the present utility model that limited by appended claims, can make a variety of changes it in the form and details.
Claims (10)
- One kind the series connection multiterminal HVDC transmission system, it is characterized in that comprising:At least one current conversion station;Described current conversion station comprises:Capacitor;Can be connected to the converter transformer of AC network;Be connected to the converter valve of described converter transformer; WithGround network;Wherein:Connect described capacitor between the ground network of the dc terminal of described current conversion station and described current conversion station.
- 2. series connection multiterminal HVDC transmission system as claimed in claim 1, wherein:Described current conversion station also comprises:The smoothing reactor that connects between the dc terminal of the converter valve of described current conversion station and described current conversion station.
- 3. series connection multiterminal HVDC transmission system as claimed in claim 1 or 2, wherein:The dc terminal of described current conversion station comprises: dc low-voltage end and high direct voltage end;Connect smoothing reactor between the high direct voltage end of the converter valve of described current conversion station and described current conversion station;Connect described electric capacity between the ground network of the dc low-voltage end of described current conversion station and described current conversion station.
- 4. series connection multiterminal HVDC transmission system as claimed in claim 1 or 2 also comprises:DC power transmission line;Wherein:Described at least one current conversion station comprises:The low-pressure end current conversion station; WithThe high-pressure side current conversion station of connecting with described low-pressure end current conversion station by described DC power transmission line;Wherein:The converter transformer of described low-pressure end current conversion station can be connected to the first AC network; AndThe converter transformer of described high-pressure side current conversion station can be connected to the second AC network.
- 5. series connection multiterminal HVDC transmission system as claimed in claim 4, wherein:Described low-pressure end current conversion station comprises: side of the positive electrode low-pressure end current conversion station and negative side low-pressure end current conversion station;Described high-pressure side current conversion station comprises: side of the positive electrode high-pressure side current conversion station and negative side high-pressure side current conversion station;The dc low-voltage end of side of the positive electrode low-pressure end current conversion station is connected the dc low-voltage end and is connected with negative side low-pressure end current conversion station; AndThe high direct voltage end of the dc low-voltage end of side of the positive electrode high-pressure side current conversion station and side of the positive electrode low-pressure end current conversion station is by the anodal connection of described DC line;The high direct voltage end of the dc low-voltage end of negative side high-pressure side current conversion station and negative side low-pressure end current conversion station is by the negative pole connection of described DC line.
- 6. series connection multiterminal HVDC transmission system as claimed in claim 1 or 2, wherein:Described current conversion station also comprises: the lightning arrester that connects between the ground network of the dc terminal of described current conversion station and described current conversion station.
- 7. current conversion station that is used for the series connection multiterminal HVDC transmission system comprises:Can be connected to the converter transformer of AC network;Be connected to the converter valve of described converter transformer;Capacitor; WithGround network;Wherein:Connect described capacitor between the ground network of the dc terminal of described current conversion station and described current conversion station.
- 8. current conversion station as claimed in claim 7 also comprises:The smoothing reactor that connects between the dc terminal of the converter valve of described current conversion station and described current conversion station.
- 9. current conversion station as claimed in claim 7 or 8, wherein:The dc terminal of described current conversion station comprises: dc low-voltage end and high direct voltage end;Connect smoothing reactor between the high direct voltage end of the converter valve of described current conversion station and described current conversion station;Connect described electric capacity between the ground network of the dc low-voltage end of described current conversion station and described current conversion station.
- 10. current conversion station as claimed in claim 9 also comprises:The lightning arrester that connects between the ground network of the dc terminal of described current conversion station and described current conversion station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320267045 CN203278258U (en) | 2013-05-16 | 2013-05-16 | Series connection multiterminal high-voltage direct current transmission system and converter station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320267045 CN203278258U (en) | 2013-05-16 | 2013-05-16 | Series connection multiterminal high-voltage direct current transmission system and converter station |
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| CN203278258U true CN203278258U (en) | 2013-11-06 |
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| CN 201320267045 Expired - Lifetime CN203278258U (en) | 2013-05-16 | 2013-05-16 | Series connection multiterminal high-voltage direct current transmission system and converter station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667060A (en) * | 2018-04-18 | 2018-10-16 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of method that current conversion station improves change of current valve tower operational reliability |
-
2013
- 2013-05-16 CN CN 201320267045 patent/CN203278258U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667060A (en) * | 2018-04-18 | 2018-10-16 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of method that current conversion station improves change of current valve tower operational reliability |
| CN108667060B (en) * | 2018-04-18 | 2021-06-08 | 中国电力工程顾问集团西南电力设计院有限公司 | Method for improving operation reliability of converter valve tower in converter station |
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Effective date of registration: 20180524 Address after: Baden, Switzerland Patentee after: ABB Switzerland Co.,Ltd. Address before: Zurich Patentee before: ABB TECHNOLOGY Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210525 Address after: Baden, Switzerland Patentee after: ABB grid Switzerland AG Address before: Baden, Switzerland Patentee before: ABB Switzerland Co.,Ltd. |
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Address after: Swiss Baden Patentee after: Hitachi energy Switzerland AG Address before: Swiss Baden Patentee before: ABB grid Switzerland AG |
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Granted publication date: 20131106 |
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