CN214542936U - Wiring arrangement structure of extra-high voltage flexible direct current transformer and starting circuit - Google Patents
Wiring arrangement structure of extra-high voltage flexible direct current transformer and starting circuit Download PDFInfo
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- CN214542936U CN214542936U CN202120288804.1U CN202120288804U CN214542936U CN 214542936 U CN214542936 U CN 214542936U CN 202120288804 U CN202120288804 U CN 202120288804U CN 214542936 U CN214542936 U CN 214542936U
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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 discloses a flexible direct current transformer of special high voltage and start-up loop's wiring arrangement structure relates to flexible direct current transmission converter station engineering technical field. The system comprises a flexible direct transformer, a starting loop device and a neutral point cable terminal; the net side of gentle straight transformer is provided with net side high-voltage bushing and net side neutral point sleeve pipe, and the valve side of gentle straight transformer is provided with valve side high-voltage bushing and valve side neutral point sleeve pipe, and net side high-voltage bushing is connected with start-up loop equipment, and the valve side of gentle straight transformer runs through the valve room outer wall face and stretches into the valve room. The utility model discloses well start-up loop equipment arranges side by side with gentle straight transformer compactness, and the inlet wire overline all adopts the flexible conductor to be connected to earlier on supporting formula tubular bus with gentle straight transformer net side sleeve pipe, is leaded to the mode on each equipment terminal of start-up loop by tubular bus again, and the stress that makes longer flexible conductor produce is undertaken by supporting formula tubular bus, on not directly acting on equipment terminal, is favorable to the long-term safety and stability operation of equipment.
Description
Technical Field
The utility model relates to a flexible direct current transmission converter station engineering technical field, it is the wiring arrangement structure of extra-high voltage flexible direct current transformer and start-up circuit that says so more specifically.
Background
Compared with the traditional direct current transmission, the flexible direct current transmission has the advantages of no need of reactive compensation, no risk of commutation failure, capability of supplying power to a passive system, independent control of active power and reactive power, low harmonic level, easiness in forming a multi-terminal direct current system, small occupied area and the like. The ultra-high voltage direct current transmission is an engineering technology with unique advantages in the aspect of realizing long-distance and large-capacity power transmission. The extra-high voltage direct current transmission technology adopting the flexible direct current conversion unit has the advantages of the extra-high voltage direct current transmission technology and the flexible direct current conversion unit. The flexible direct current conversion unit in the extra-high voltage flexible direct current conversion station is a core component of an extra-high voltage flexible direct current transmission technology with the voltage class of +/-800 kV and above, and the wiring and arrangement of the flexible direct current transformer and the starting circuit are important components of the flexible direct current conversion unit.
However, the existing mature flexible dc transformer and the wiring and arrangement structure of the starting circuit are only suitable for the flexible dc transmission engineering with the voltage level lower than ± 500kV, the smaller equipment size and the low requirement for the electrical clear distance, and the research on the wiring and arrangement structure of the flexible dc conversion unit with the voltage level of ± 800kV and above is still in the initial starting stage, and there is no corresponding engineering application case.
Therefore, it is necessary to develop a wiring arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point of above-mentioned background art, and provide a wiring arrangement structure of flexible direct current transformer of special high voltage and start-up circuit.
In order to realize the purpose, the technical scheme of the utility model is that: the wiring arrangement structure of the extra-high voltage flexible direct current transformer and the starting circuit is characterized in that: the system comprises a flexible direct transformer, a starting loop device and a neutral point cable terminal;
the net side of gentle straight transformer is provided with net side high-voltage bushing and net side neutral point sleeve pipe, and the valve side of gentle straight transformer is provided with valve side high-voltage bushing and valve side neutral point sleeve pipe, and net side high-voltage bushing is connected with the start-up circuit equipment, and net side neutral point sleeve pipe is connected with neutral point cable termination, and the valve side of gentle straight transformer runs through the valve room outer wall face and stretches into the valve room.
In the above technical solution, the flexible-direct transformers have three phases, the network-side star connection of each phase of flexible-direct transformers is realized through a network-side neutral point, and the valve-side star connection of each phase of flexible-direct transformers is realized through a valve-side neutral point.
In the above technical solution, the starting circuit device includes a first supporting tubular bus and a second supporting tubular bus; two ends of the first supporting tubular bus are supported by first supporting insulators, and a current transformer is arranged on the first supporting tubular bus in a suspending mode; the current transformer is electrically connected with an incoming line overline of the flexible-direct transformer through a first supporting tubular bus and a first flexible conductor, and the current transformer is electrically connected with an incoming line terminal of the starting resistor through the first flexible conductor;
one end of the second support type tubular bus is supported by a voltage transformer, and the other end of the second support type tubular bus is supported by a first support insulator; the outlet terminal of the starting resistor is electrically connected with the second support type tubular bus through a first flexible wire;
a bypass isolating switch is electrically connected between the first supporting tubular busbar and the second supporting tubular busbar through a first flexible conductor; the bypass isolating switch is connected in parallel with a series loop formed by the current transformer and the starting resistor;
and the net side high-voltage sleeve is electrically connected with the first flexible lead and the second support type tubular bus.
In the above technical solution, the second support type tubular busbar is electrically connected to the high-voltage end of the arrester.
In the above technical scheme, the network side neutral point bushing is electrically connected with the third support type tubular busbar through the second flexible conductor, and the third support type tubular busbar is electrically connected with the neutral point cable terminal.
IN the technical scheme, a main oil tank of the flexible-direct transformer is wrapped inside the BOX-IN; and a firewall is arranged on one side of the flexible-direct transformer, which is far away from the starting loop equipment.
In the above technical solution, the third support type tubular busbar is located on the upper portion of the firewall, and both ends of the third support type tubular busbar are supported by the second post insulator.
In the technical scheme, every two neutral point cable terminals of each phase of the flexible-direct transformer are electrically connected through a neutral point cable to form a network side star-shaped connection.
In the above technical solution, the neutral point cable is located in the cable trench.
In the technical scheme, two valve side neutral point sleeves of each phase of the flexible-direct transformer are electrically connected with a fourth support type tubular bus through a third flexible lead to form a valve side star-shaped connection.
Compared with the prior art, the utility model has the advantages of it is following:
1) the utility model discloses well start-up loop equipment arranges side by side with gentle straight transformer compactness, and the inlet wire overline all adopts the flexible conductor to be connected to earlier on supporting formula tubular bus with gentle straight transformer net side sleeve pipe, is leaded to the mode on each equipment terminal of start-up loop by tubular bus again, and the stress that makes longer flexible conductor produce is undertaken by supporting formula tubular bus, on not directly acting on equipment terminal, is favorable to the long-term safety and stability operation of equipment.
2) Influenced by the live distance of the starting loop equipment, if the conventional neutral point connection method of the conventional direct current converter transformer and the low-voltage-level flexible direct current transformer is adopted, an open neutral point connection conductor needs to be arranged on a flexible direct current transformer square for an additional station; the utility model discloses a star type between the gentle straight transformer neutral point of different phases is realized to the cable and is connected, is showing and has practiced thrift area.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the three-phase soft-direct transformer of the present invention.
Fig. 3 is a schematic plan view of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.
With reference to the accompanying drawings: the wiring arrangement structure of the extra-high voltage flexible direct current transformer and the starting circuit is characterized in that: the system comprises a flexible direct transformer 1, a starting loop device 2 and a neutral point cable terminal 3;
the net side of gentle straight transformer 1 is provided with net side high-voltage bushing 11 and net side neutral point sleeve pipe 12, and the valve side of gentle straight transformer 1 is provided with valve side high-voltage bushing 13 and valve side neutral point sleeve pipe 14, and net side high-voltage bushing 11 is connected with start-up loop equipment 2, and net side neutral point sleeve pipe 12 is connected with neutral point cable terminal 3, and the valve side of gentle straight transformer 1 runs through valve hall outer wall surface 6 and stretches into the valve hall.
The flexible direct-current transformer 1 has three phases, the network side star-shaped connection of each phase of flexible direct-current transformer 1 is realized through a network side neutral point, and the valve side star-shaped connection of each phase of flexible direct-current transformer 1 is realized through a valve side neutral point.
The starting circuit device 2 comprises a first supporting tubular busbar 21 and a second supporting tubular busbar 22; two ends of the first supporting tubular bus 21 are supported by first supporting insulators 23, and a current transformer 24 is arranged on the first supporting tubular bus 21 in a suspending manner; the current transformer 24 is electrically connected with an incoming line overline of the flexible-direct transformer through a first supporting tubular bus 21 and a first flexible conductor 25, and the current transformer 24 is electrically connected with an incoming line terminal of the starting resistor 26 through the first flexible conductor 25;
one end of the second supporting tubular bus 22 is supported by a voltage transformer 27, and the other end is supported by a first post insulator 23; the outlet terminal of the starting resistor 26 is electrically connected with the second support type tubular bus 22 through a first flexible wire 25;
a bypass isolating switch 28 is electrically connected between the first supporting tubular busbar 21 and the second supporting tubular busbar 22 through a first flexible conductor 25; the bypass isolating switch 28 is connected in parallel with a series loop formed by the current transformer 24 and the starting resistor 26;
the network side high voltage bushing 11 and the first flexible conductor 25 are electrically connected to the second supporting tubular busbar 22.
The second supporting tubular busbar 22 is electrically connected with the high-voltage end of the lightning arrester 29.
The network side neutral point sleeve 12 is electrically connected with a third support type tubular bus 32 through a second flexible conductor 31, and the third support type tubular bus 32 is electrically connected with the neutral point cable terminal 3.
The oil tank of the body of the flexible-direct transformer 1 is wrapped inside the BOX-IN4, so that the noise is reduced; one side of the flexible-direct transformer 1, which is far away from the starting loop device 2, is provided with a firewall 5, so that the flexible-direct transformer 1 and the starting loop device 2 are separated from each other in a fireproof mode in the adjacent areas.
The third supporting tubular busbar 32 is located on the upper portion of the firewall 5, and both ends of the third supporting tubular busbar 32 are supported by second post insulators 33.
And the neutral point cable terminals 3 of each phase of the flexible-direct transformer 1 are electrically connected in pairs through neutral point cables 34 to form a network side star-shaped connection.
The neutral cable 34 is located in a cable trench 35.
Two valve side neutral point sleeves 14 of each phase of the flexible-direct transformer 1 are electrically connected with a fourth support type tubular bus 16 through a third flexible conductor 15, so that a valve side star-shaped connection is formed.
In practical use, each phase of flexible-direct transformer 1 and the start-up loop device 2 form a single-phase flexible-direct and start-up loop unit. After the network side neutral point and the valve side neutral point of the three single-phase flexible direct-current converting and starting circuit units are connected, a flexible direct-current converting and starting circuit of the flexible direct-current converting unit valve bank is formed; the arrester is arranged right below the second supported tubular busbar 22
Other parts not described belong to the prior art.
Claims (10)
1. The wiring arrangement structure of the extra-high voltage flexible direct current transformer and the starting circuit is characterized in that: the system comprises a flexible-direct transformer (1), a starting loop device (2) and a neutral point cable terminal (3);
the net side of gentle straight transformer (1) is provided with net side high-voltage bushing (11) and net side neutral point sleeve pipe (12), and the valve side of gentle straight transformer (1) is provided with valve side high-voltage bushing (13) and valve side neutral point sleeve pipe (14), and net side high-voltage bushing (11) are connected with start-up loop equipment (2), and net side neutral point sleeve pipe (12) are connected with neutral point cable termination (3), and the valve side of gentle straight transformer (1) runs through valve hall outer wall face (6) and stretches into the valve hall.
2. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop according to claim 1, characterized in that: the flexible direct-current transformer (1) has three phases, the network side star-shaped wiring is realized through a network side neutral point of each phase of flexible direct-current transformer (1), and the valve side star-shaped wiring is realized through a valve side neutral point of each phase of flexible direct-current transformer (1).
3. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop according to claim 2, characterized in that: the starting circuit device (2) comprises a first supporting tubular busbar (21) and a second supporting tubular busbar (22); two ends of the first supporting tubular bus (21) are supported by first supporting insulators (23), and a current transformer (24) is arranged on the first supporting tubular bus (21) in a suspending manner; the current transformer (24) is electrically connected with an inlet wire overline of the flexible-direct transformer through a first supporting tubular bus (21) and a first flexible conductor (25), and the current transformer (24) is electrically connected with an inlet wire terminal of the starting resistor (26) through the first flexible conductor (25);
one end of the second support type tubular bus (22) is supported by a voltage transformer (27), and the other end of the second support type tubular bus is supported by a first post insulator (23); the outlet terminal of the starting resistor (26) is electrically connected with the second support type tubular bus (22) through a first flexible lead (25);
a bypass isolating switch (28) is electrically connected between the first supporting tubular bus (21) and the second supporting tubular bus (22) through a first flexible conductor (25); the bypass isolating switch (28) is connected in parallel with a series circuit formed by the current transformer (24) and the starting resistor (26);
and the net side high-voltage sleeve (11), the first flexible lead (25) and the second support type tubular bus (22) are electrically connected.
4. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop according to claim 3, characterized in that: the second support type tubular bus (22) is electrically connected with the high-voltage end of the lightning arrester (29).
5. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting circuit according to claim 4, characterized in that: the net side neutral point sleeve (12) is electrically connected with a third support type tubular bus (32) through a second flexible conductor (31), and the third support type tubular bus (32) is electrically connected with a neutral point cable terminal (3).
6. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop according to claim 5, characterized in that: the oil tank of the body of the flexible-direct transformer (1) is wrapped inside the BOX-IN (4); and a firewall (5) is arranged on one side of the flexible-direct transformer (1) far away from the starting loop equipment (2).
7. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting circuit according to claim 6, characterized in that: and the third support type tubular bus (32) is positioned at the upper part of the firewall (5), and two ends of the third support type tubular bus (32) are supported by second post insulators (33).
8. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop according to claim 7, characterized in that: and neutral point cable terminals (3) of each phase of the flexible-direct transformer (1) are electrically connected in pairs through neutral point cables (34) to form a network side star-shaped connection.
9. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting loop according to claim 8, characterized in that: the neutral cable (34) is located in a cable trench (35).
10. The connection arrangement structure of the extra-high voltage flexible direct current transformer and the starting circuit according to claim 9, characterized in that: two valve side neutral point sleeves (14) of each phase of flexible-direct transformer (1) are electrically connected through a third flexible lead (15) and a fourth support type tubular bus (16) to form valve side star-shaped wiring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120288804.1U CN214542936U (en) | 2021-02-01 | 2021-02-01 | Wiring arrangement structure of extra-high voltage flexible direct current transformer and starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120288804.1U CN214542936U (en) | 2021-02-01 | 2021-02-01 | Wiring arrangement structure of extra-high voltage flexible direct current transformer and starting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN214542936U true CN214542936U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120288804.1U Active CN214542936U (en) | 2021-02-01 | 2021-02-01 | Wiring arrangement structure of extra-high voltage flexible direct current transformer and starting circuit |
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| Country | Link |
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| CN (1) | CN214542936U (en) |
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2021
- 2021-02-01 CN CN202120288804.1U patent/CN214542936U/en active Active
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