JPS5829315A - Dc bus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an am bus used in an ultra-high voltage AC/DC conversion station.

Conventional AC/DC converter stations are configured with equipment based on air insulation. However, in recent years, there has been a trend toward higher power in power systems, and when transmitting large amounts of power to remote locations, the transmission voltage is increasing even in the case of direct current as well as alternating current, and ±250KV class AC/DC converters have already been constructed. There is.

FIG. 1 shows a single connection section of such an AC/DC converter station. In Figure 1, 1 is the 21st bus bar on the AC side, and 2 is this 21 bus bar.
Between 1 busbars 1: A plurality of busbar switching disconnectors provided in pairs.

1 is an AC breaker provided between two electric bus bars 1. Busbar switching disconnector 2. AC, sink and disconnector J, connection disconnector 4
constitutes an AC side switchgear with 21 busbars and 4 bus ties. Further, 5 is a thyristor pulp for converting alternating current into direct current, Ja is a low pressure stage, jb is a high pressure stage, and 6 is a DC side winding of the thyristor pulp 5 in the low pressure stage and high pressure stage 6.
between the pair of busbar switching new circuit devices 2 connected to each input terminal of b, and whose AC side windings are connected to each other via the AC side breaker 1. 8 is a DC reactor divided into two parts on the output side of the thyristor pulp 5, g
Neutral line side 1 of thyristor pulp 5: A neutral line side disconnector provided, these thyristor pulps 6, conversion transformer C1 DC reactor 8. It constitutes the neutral line side disconnector gVi conversion unit. Further, I: 10 and 11 are two main busbars on the anode side and the main busbar on the cathode side, and 12 is a neutral wire forming a return conductor of the thyristor pulp 6. Reference numeral 13 indicates a plurality of DC side bus bar switching/disconnectors provided in pairs between the anode side main bus bars 10, and 14 indicates an anode side main bus bar 1.
0 to each other via disconnectors 15 on both sides; 16, a plurality of DC-side bus switching disconnectors provided in pairs between the cathode-side main buses 11; 12;
is a DC breaker that connects the cathode side main bus bars 11 via new circuits 11 on both sides, and these anodes.

Cathode side main bus bars 10, 11. Neutral wire12. DC side bus bar switching disconnection @11,16. DC breaker 14°17 and disconnector 15. III constitutes a DC side switching device.

Thus, one output end of the thyristor pulp 5 is connected to the anode branch bus 20 via the DC reactor 8 and the flow breaker 19 between one set of the DC side bus switching disconnectors 13 of the anode side main bus 10. The other output end of the thyristor pulp 5 is connected to the cathode branch bus 21 via a DC reactor 8 and a DC breaker 19 between one set of DC side bus switching disconnectors 13 of the cathode side main bus 11. Further, the neutral bond side end of the thyristor pulp 5 is connected to the neutral line 12 via a neutral line side disconnector 9. On the other hand, reference numeral 22 denotes an AC filter connected between the bus bar switching disconnectors 2 of the other sets of the AC side bus bar 1 via the AC switch 111Fi device 2J.

Reference numeral 24 denotes a phase adjusting equipment connected via an AC breaker 25 between the busbar switching disconnectors 2 of another group different from the above, and 26 also a phase modifier I: busbar switching of another group different from the above. A new circuit switch 21. AC breaker 28
AC side couple head connected via. Also.

29 is a DC anode side gaple head connected between the other sets of DC side bus switching disconnectors J3 of the anode side main bus 1o via the disconnector SO0 DC switch #I switch 3; 32 is a neutral M
Disconnector s1 to I J z . The cable head 51 on the DC neutral line side is connected via the DC and l# converter 34, and 51 is a DC filter connected between the two gable heads xs and ax.

By the way, in the AC/DC converter station C with the above-mentioned wiring configuration, if the equipment and busbars are arranged based on air insulation,
Since the pulp building housing the thyristor pulp 5 as well as the AC and DC switchgear occupy a large area, it is required to make these as small as possible. In FIG. 1, the special≦2 DC switchgear includes a thyristor pulp 5 and a DC reactor 8. DC reactor 8 and DC cutoff @
19, DC breaker I9 and anode.

A branch busbar 20°21 connecting the cathode side main busbars 10 and 11,
Anode, r4 & bridge side main bus bar 10, 11. When the neutral wire 12 and the like are configured with air insulation, a large insulation space is required.

The present invention has been made in view of the above circumstances, and its purpose is to house a DC high Kameda conductor in an airtight metal container together with a high voltage insulating gas, and to house a neutral conductor in the same airtight metal container. Alternatively, by using an airtight metal container also as a neutral line conductor, the overall size can be significantly reduced, thereby providing a DC bus that can greatly contribute to space saving and economical efficiency.

An embodiment of the present invention will be described below with reference to the drawings. Second
4 to 4 show examples of the structure of the DC bus according to the present invention. FIG. 2 shows a cylindrical airtight metal container 4 in which an anode side high voltage conductor 42-1 and a neutral line conductor 43 are housed with a suitable distance apart together with a high strength insulating gas. Further, FIG. 3 shows two anode-side high voltage conductors 41-1 in the cylindrical airtight metal container 4. Cathode side high voltage conductor 42
-2 and the neutral line conductor 43 are appropriately spaced apart and housed together with high-voltage insulating gas. Furthermore, FIG. 4 shows the interior of a cylindrical airtight metal container 41 C: two wires of the same polarity, here the anode side high voltage conductor 42-1 and the neutral line conductor 48 are separated appropriately and are housed together with a high voltage insulating gas (; It was designed to do so.

Therefore, if we use a DC bus with such a configuration.

DC high voltage conductors (anode side high voltage conductor 43-1; anode and cathode side high voltage conductors 42-1 and 4
2-J, the two anode side high voltage conductors 4X-Z) and the neutral line conductor 43 are housed together with high voltage insulating gas, so the DC high voltage conductor 42 and the neutral line conductor 4J The insulation distance can be significantly reduced compared to the air insulation method, and since each conductor is housed in the same airtight metal container 41, the entire structure can be made compact. This allows the DC bus to be connected to the Tiirista pulp 5 and the DC reactor 8. shown in FIG. Branch busbars 10, 21 . . . which connect the DC reactor 8 and the DC breaker @II, the DC breaker 19 and the anode and cathode side main busbars 10, 11. Anode, cathode side main bus bar 1#.

11. Bus bar configuration such as neutral line I: If adopted, the entire DC switchgear will be reduced to a large wheel, saving space and improving economy C
:Can make a big contribution.

115 to 7 respectively show other configuration examples of the DC bus according to the present invention. Fig. 115 shows a cylindrical airtight metal container 51 I: an anode side high voltage conductor 52-1 is housed together with a high voltage insulating gas.

Moreover, the airtight metal container 11 is S2 so that it can also be used as a neutral line conductor. The 6th vA is connected to an anode side high voltage conductor 52-1 in a cylindrical airtight metal container 5. The cathode-side high-voltage conductor 51-2 is appropriately spaced apart and housed together with the pressure insulating gas, and the airtight metal container 51 is also used as the neutral line conductor 5. Two conductors of the same polarity, in this case an anode side high voltage conductor 52-1, are housed with a suitable distance between them and a high voltage insulating gas in an airtight metal container 51, and the airtight metal container 51 is also used as a neutral line conductor 1. This is how it was done.

Therefore, if we use a DC bus with such a configuration.

Since the diameter of the airtight metal container JJ can be made smaller than that of the above-mentioned embodiment J, the whole can be made even more compact. From C: @1 Figure C2 DC side bus bar configuration C:
If adopted, the entire DC switchgear will be reduced in size and will greatly contribute to space savings and improved economic efficiency.

As described above, according to the present invention, a DC high voltage conductor is housed in an airtight metal container along with two high voltage insulating gases, and a neutral line conductor is housed in the same airtight container, or the airtight metal container is housed inside the airtight metal container. Since the DC bus bar is designed to serve also as a sex wire conductor, the overall size can be significantly reduced, thereby making it possible to provide a DC bus bar that can greatly contribute to saving space and improving economic efficiency.

[Brief explanation of the drawing]

Figure 1 is a single connection diagram showing an example of the configuration of an AC/DC converter station, and Figures 2 to ! Figure J4 is a configuration diagram showing different embodiments of the present invention, and Figures 5@1 to 7 are diagrams showing further different embodiments of the present invention, respectively. I... Anode side high voltage conductor, 4
jt-1, l1l-J...Cathode side high voltage conductor, 43...
- Neutral conductor. Applicant's agent Suzu Benshio Takehiko E Figure 2 Figure 3 Figure 1 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] (11) A DC bus bar characterized in that a DC high voltage conductor and a medium line conductor are housed in a cylindrical airtight metal container with a suitable distance between them, together with a high pressure section and edge gas. (2) In the item described in claim (1), a DC bus bar in which the DC high voltage conductor is one of an anode or a negative electrode. (Group Claim (1)) (4) In the product described in claim (1), the DC high voltage conductor is a DC bus using two conductors, an anode and a cathode. (5) A DC high-voltage conductor is housed together with a high-voltage insulating gas in an 8-fold airtight metal container, and the airtight metal container is also used as a neutral line conductor. (6) Claim (6) Item 1: What is described in i.
2, the DC high voltage conductor is Ia pole or cathode one.
This is the DC bus used in this work. (7) The DC bus according to claim 6) g-2, in which the DC high voltage conductor includes two conductors, an anode and a # pole. (8) The Naoe bus bar according to claim 1, in which two DC high voltage conductors of the same polarity are used.