CN219833981U - Arrangement structure of bipolar flexible direct-current offshore converter station valve hall - Google Patents
Arrangement structure of bipolar flexible direct-current offshore converter station valve hall Download PDFInfo
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- CN219833981U CN219833981U CN202320619699.4U CN202320619699U CN219833981U CN 219833981 U CN219833981 U CN 219833981U CN 202320619699 U CN202320619699 U CN 202320619699U CN 219833981 U CN219833981 U CN 219833981U
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- 230000005540 biological transmission Effects 0.000 description 9
- 230000005404 monopole Effects 0.000 description 5
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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 relates to an arrangement structure of a valve hall of a bipolar flexible direct current offshore converter station, which is used for filling the blank of the design of a domestic symmetrical bipolar offshore converter station, and equipment such as a converter valve, a valve alternating current side lightning arrester, a valve alternating current side grounding switch, a valve alternating current side current measuring device, a valve direct current side lightning arrester, a valve direct current side grounding switch, a valve direct current side current measuring device, a direct current wall bushing and the like are arranged in the flexible direct current valve hall of the symmetrical bipolar offshore flexible direct current converter station. The utility model can meet the process requirements of symmetrical bipolar electric wiring, has simple and compact electric arrangement and reasonable connection among devices, meets the air clearance requirement and the device maintenance requirement, has good operation reliability and maintenance convenience, can greatly reduce the size of a valve hall of the symmetrical bipolar flexible direct current marine converter station, and reduces the engineering cost. The valve hall is difficult to overhaul in the process of delivering the offshore wind power, and the technical problem of low availability of the offshore wind power delivery can be solved.
Description
Technical Field
The utility model relates to the technical field of offshore wind power flexible direct current transmission engineering, in particular to an arrangement structure of a bipolar flexible direct current offshore converter station valve hall.
Background
The flexible direct current transmission system comprises two symmetrical monopole and bipolar connection modes. At present, the sea wind flexible direct-current transmission projects put into operation worldwide all adopt symmetrical monopole wiring. The symmetrical monopole wiring is simple, the number of equipment is small, and the overall investment is low, but if any element of the direct current system fails, the whole power transmission capacity is lost.
The bipolar wiring mode still has half power transmission capacity when the monopole equipment at the direct current side fails, is suitable for being applied to a large-capacity open sea wind power transmission scene which is far away from the land and is difficult to overhaul, and can improve the sea wind power transmission availability. At present, no design experience of a symmetrical bipolar offshore converter station exists in China, and the arrangement structure of a symmetrical monopole system cannot be suitable for the symmetrical bipolar system, so that the design of the bipolar offshore converter station for offshore wind power transmission is a problem to be solved urgently.
Disclosure of Invention
The utility model aims to provide an arrangement structure of a valve hall of a bipolar flexible direct current marine converter station, which can solve the technical problems that the valve hall is difficult to overhaul and the availability of marine wind power transmission is low in the process of delivering the marine wind power, and meanwhile, the arrangement of the valve hall is clear and concise, and the size of the valve hall of the symmetric bipolar flexible direct current marine converter station can be greatly reduced.
In order to achieve the purpose, the utility model designs an arrangement structure of a bipolar flexible direct current marine converter station valve hall, which comprises at least two valve halls which are symmetrically arranged;
each valve hall is of a hollow structure, three-phase bridge arms are parallelly arranged in the hollow cavity, each bridge arm comprises a converter valve bank formed by at least two converter valve towers connected in series, and two sides of the converter valve bank along the length direction are respectively an alternating current side and a direct current side;
the alternating current side of the converter valve bank is sequentially connected with an alternating current side voltage measuring device, an alternating current side lightning arrester, an alternating current side incoming line cable terminal and an alternating current side grounding knife through valve alternating current side connecting wires; the end part of the alternating current side lightning arrester is connected with a converter valve tower positioned at the alternating current side through a valve alternating current side connecting wire;
the direct current side of the converter valve bank is sequentially connected with a direct current measuring device, a direct current side lightning arrester, a direct current side inlet wall bushing and a direct current side ground knife through valve direct current side connecting wires; the end part of the direct current side inlet wire wall bushing is connected with a converter valve tower positioned on the direct current side through a valve direct current side connecting wire.
As a preferable scheme, the alternating current side voltage measuring device, the alternating current side lightning arrester, the alternating current side incoming line cable terminal and the alternating current side ground knife are all arranged on the ground of the alternating current side of the valve hall.
As the preferable scheme, the top ends of the alternating current side lightning arrester and the alternating current side incoming cable terminal are respectively provided with a valve alternating current side connecting fitting.
The valve alternating current side suspension insulator is vertically arranged at the top of the valve hall, and the end part of the alternating current side lightning arrester is connected with the converter valve tower positioned at the alternating current side through the valve alternating current side suspension insulator by a valve alternating current side connecting wire.
As the preferable scheme, direct current measuring device, direct current side arrester are all installed on the ground of valve hall direct current side, direct current side inlet wire wall bushing installs perpendicularly at the top of valve hall direct current side, direct current side ground sword is installed on the side wall of valve hall direct current side.
As a preferable scheme, the top end of the direct current side lightning arrester is provided with a valve direct current side connecting fitting.
The utility model has the beneficial effects that:
the utility model provides an arrangement structure of a valve hall of a symmetrical bipolar flexible direct current offshore converter station for the first time, which is used for filling the blank of the design of the domestic symmetrical bipolar offshore converter station. The flexible DC valve hall of the symmetrical bipolar offshore flexible DC converter station is internally provided with a converter valve, a valve AC side arrester, a valve AC side grounding switch, a valve AC side current measuring device, a valve DC side arrester, a valve DC side grounding switch, a valve DC side current measuring device, a DC wall bushing and other devices.
The utility model can meet the process requirements of symmetrical bipolar electric wiring, has simple and compact electric arrangement and reasonable connection among devices, meets the air clearance requirement and the device maintenance requirement, has good operation reliability and maintenance convenience, can greatly reduce the size of a valve hall of the symmetrical bipolar flexible direct current marine converter station, and reduces the engineering cost. The valve hall is difficult to overhaul in the process of delivering the offshore wind power, and the technical problem of low availability of the offshore wind power delivery can be solved.
Drawings
Fig. 1 is a schematic view of the arrangement of a single valve hall of the present utility model.
Fig. 2 is a schematic partial cross-sectional view of fig. 1.
Reference numerals illustrate:
ac side: an alternating current side ground knife 1, an alternating current side incoming cable terminal 2, an alternating current side lightning arrester 3, an alternating current side voltage measuring device 4, a valve hall alternating current side wall surface 10, a valve alternating current side suspension insulator 13, a valve alternating current side connecting wire 15 and a valve alternating current side connecting fitting 16;
direct current side: the direct current side current measuring device 6, the direct current side lightning arrester 7, the direct current side incoming line wall bushing 8, the direct current side ground knife 9, the valve hall direct current side wall 11, the valve direct current side connecting wire 17 and the valve direct current side connecting fitting 18; the converter valve tower 5 and the valve hall short axis direction side wall surface 12.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model relates to an arrangement structure of a valve hall of a bipolar flexible direct current offshore converter station, which is used for filling the blank of the design of a domestic symmetrical bipolar offshore converter station, and equipment such as a converter valve, a valve alternating current side lightning arrester, a valve alternating current side grounding switch, a valve alternating current side current measuring device, a valve direct current side lightning arrester, a valve direct current side grounding switch, a valve direct current side current measuring device, a direct current wall bushing and the like are arranged in the flexible direct current valve hall of the symmetrical bipolar offshore flexible direct current converter station. The size of the flexible direct current valve hall is mainly determined by factors such as the arrangement size of a converter valve, the alternating current side incoming line of the converter valve, the arrangement wiring of direct current side equipment, the air clearance, an overhaul and maintenance channel and the like. The valve hall is clear and concise in arrangement, convenient to overhaul and maintain, capable of greatly reducing the size of the symmetrical bipolar flexible direct current marine converter station valve hall and reducing the engineering cost.
The utility model relates to an arrangement structure of a bipolar flexible direct-current offshore converter station valve hall, which comprises a positive electrode valve hall and a negative electrode valve hall, wherein the two valve halls are symmetrically arranged, and can be vertically and symmetrically arranged or left and right symmetrically arranged according to actual conditions.
The following describes the arrangement structure of the positive electrode valve hall, as shown in fig. 1 and 2. The positive valve hall is a rectangular cavity formed by a valve hall alternating current side wall surface 10, a valve hall direct current side wall surface 11 and a valve hall short axis direction side wall surface 12. Two positive pole A-phase bridge arms, two positive pole B-phase bridge arms and two positive pole C-phase bridge arms are simultaneously arranged in the positive pole valve hall, six bridge arms in the valve hall are arranged in parallel in an ABCCBA structure, the arrangement structure is shown in figure 1, each bridge arm comprises a converter valve group consisting of at least two converter valve towers 5 connected in series, and the two sides of the converter valve group along the length direction are an alternating current side and a direct current side respectively.
The alternating current side of the converter valve bank is sequentially connected with an alternating current side voltage measuring device 4, an alternating current side lightning arrester 3, an alternating current side incoming line cable terminal 2 and an alternating current side grounding knife 1 through a valve alternating current side connecting wire 15; the alternating-current side voltage measuring device 4, the alternating-current side lightning arrester 3, the alternating-current side incoming line cable terminal 2 and the alternating-current side ground knife 1 are all arranged on the ground on the alternating-current side of the positive electrode valve hall; valve alternating current side link fitting 16 is all installed on the top of alternating current side arrester 3, alternating current side inlet wire cable terminal 2, and valve alternating current side suspension insulator 13 is installed perpendicularly at the top of anodal valve hall, the tip of exchanging side arrester 3 is connected with the converter valve tower 5 that is located the alternating current side through valve alternating current side suspension insulator 13 through valve alternating current side connecting wire 15.
The direct current side of the converter valve bank is sequentially connected with a direct current measuring device 6, a direct current side lightning arrester 7, a direct current side incoming line wall bushing 8 and a direct current side ground knife 9 through a valve direct current side connecting wire 17, and a valve direct current side connecting fitting 18 is arranged at the top end of the direct current side lightning arrester 7; the direct current measuring device 6 and the direct current side lightning arrester 7 are both arranged on the ground on the direct current side of the positive electrode valve hall; the direct current side inlet wire wall bushing 8 is vertically arranged and is arranged at the top of the direct current side of the positive electrode valve hall, and the end part of the direct current side inlet wire wall bushing 8 is connected with the converter valve tower 5 through a valve direct current side connecting wire 17; the direct current side ground knife 9 is a side wall type and is arranged on a valve hall direct current side wall surface 11 of the positive valve hall.
The arrangement structure in the negative valve hall is similar to that in the positive valve hall, and only the three-phase bridge arm is changed into a negative electrode.
The utility model also relates to a method for dimensioning a valve hall of a bipolar flexible direct current marine converter station, comprising the steps of,
the horizontal length dimension of the single valve hall along the bridge arm direction is as follows: l (L) 1 +L 2 +L 3 。
Wherein the method comprises the steps of
(1) Ac side incoming line loop length:
L 1 ＞e+d 1 +d 2
in which L 1 E is the distance from the center of the alternating current side incoming line cable terminal 2 to the alternating current side wall surface 10 of the valve hall, d is the distance from the center of the alternating current side incoming line cable terminal 2 to the alternating current side wall surface 10 of the valve hall under the requirement of the clearance between the equalizing ring of the cable terminal and the side wall surface of the converter valve tower 5 1 D is the distance between the AC side lightning arrester 3 and the AC side incoming cable terminal 2 2 The clearance between the alternating current side lightning arrester 3 and the converter valve tower 5 is the same-phase upper and lower bridge arms of the converter valve in adjacent arrangement mode; d, d 1 And d 2 The maintenance space is considered.
(2) Bridge arm length of converter valve:
L 2 ＝a×n+d×(n-1)
in which L 2 The length of a bridge arm of the soft direct current converter valve is a single-tower length of a converter valve tower 5, n is the number of valve towers connected in series with the single bridge arm, and d is the distance between the two converter valve towers 5 connected in series with the bridge arm;
(3) Converter valve direct current side line loop length:
L 3 ＞e+d 1 +d 2
in which L 3 The clearance between the wall surface 11 of the valve hall direct current side and the direct current side of the converter valve tower 5 is provided. d, d 1 And d 2 The maintenance space is considered.
The horizontal width dimension of a single valve hall is:
W＞6×b+4×D 3 +D 4 +2×max{D 1 ，D 2 }+2×R
wherein W is the width dimension of the valve hall, b is the width of the single converter valve tower 5, D 1 For larger values of the converter transformer valve side to ground air clearance and the bridge reactance valve side to ground air clearance, D 2 To overhaul the vehicle requires clear width D 3 For the air clearance between the same bridge arm and the phase, D 4 And R is the radius of a main structural column of the valve hall, wherein the air clearance between the upper bridge arm and the lower bridge arm is the air clearance.
The height dimensions of the individual valve halls are:
H＞c+h 1 +max{D 1 ，H 1 }
wherein H is the height dimension of the valve hall, c is the height of the valve tower (comprising a base foundation), H 1 D is the distance between the bottom of the overhead travelling crane or monorail crane track and the top beam bottom of the valve hall (the deformation is considered) 1 For larger values of the air clearance to ground of the converter transformer valve side and the air clearance to ground of the bridge reactance valve side, H 1 The valve tower cooling water pipe and other components are hoisted to the required height.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (6)
1. Arrangement structure of bipolar flexible direct current marine converter station valve hall, its characterized in that: comprising at least two valve halls which are symmetrically arranged;
each valve hall is of a hollow structure, three-phase bridge arms are parallelly arranged in the hollow cavity, each bridge arm comprises a converter valve bank formed by at least two converter valve towers (5) which are connected in series, and two sides of the converter valve bank along the length direction are respectively an alternating current side and a direct current side;
the alternating current side of the converter valve bank is sequentially connected with an alternating current side voltage measuring device (4), an alternating current side lightning arrester (3), an alternating current side incoming line cable terminal (2) and an alternating current side grounding knife (1) through a valve alternating current side connecting wire (15); the end part of the alternating current side lightning arrester (3) is connected with a converter valve tower (5) positioned at the alternating current side through a valve alternating current side connecting wire (15);
the direct current side of the converter valve bank is sequentially connected with a direct current measuring device (6), a direct current side lightning arrester (7), a direct current side inlet wall bushing (8) and a direct current side grounding knife (9) through a valve direct current side connecting wire (17); the end part of the direct current side inlet wall bushing (8) is connected with the converter valve tower (5) positioned on the direct current side through a valve direct current side connecting wire (17).
2. Arrangement of bipolar flexible direct current marine converter station valve halls according to claim 1, characterized in that: the alternating current side voltage measuring device (4), the alternating current side lightning arrester (3), the alternating current side incoming line cable terminal (2) and the alternating current side grounding knife (1) are all installed on the ground on the alternating current side of the valve hall.
3. Arrangement of bipolar flexible direct current marine converter station valve halls according to claim 2, characterized in that: valve alternating current side link fitting (16) are installed on the top ends of the alternating current side lightning arrester (3) and the alternating current side incoming line cable terminal (2).
4. A bipolar flexible direct current marine converter station valve hall arrangement according to claim 3, wherein: the top of valve hall is installed perpendicularly and is had valve exchange side suspension insulator (13), the tip of exchanging side arrester (3) is connected with exchange valve tower (5) that are located the exchange side through valve exchange side suspension insulator (13) through valve exchange side connecting wire (15).
5. Arrangement of bipolar flexible direct current marine converter station valve halls according to any of claims 1 to 4, characterized in that: the direct current measuring device (6) and the direct current side lightning arrester (7) are both arranged on the ground of the direct current side of the valve hall, the direct current side inlet wall bushing (8) is vertically arranged at the top of the direct current side of the valve hall, and the direct current side ground knife (9) is arranged on the side wall of the direct current side of the valve hall.
6. Arrangement of bipolar flexible direct current marine converter station valve halls according to claim 5, characterized in that: and a valve direct current side connecting fitting (18) is arranged at the top end of the direct current side lightning arrester (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320619699.4U CN219833981U (en) | 2023-03-24 | 2023-03-24 | Arrangement structure of bipolar flexible direct-current offshore converter station valve hall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320619699.4U CN219833981U (en) | 2023-03-24 | 2023-03-24 | Arrangement structure of bipolar flexible direct-current offshore converter station valve hall |
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| Publication Number | Publication Date |
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| CN219833981U true CN219833981U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320619699.4U Active CN219833981U (en) | 2023-03-24 | 2023-03-24 | Arrangement structure of bipolar flexible direct-current offshore converter station valve hall |
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| CN (1) | CN219833981U (en) |
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- 2023-03-24 CN CN202320619699.4U patent/CN219833981U/en active Active
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