CN205666617U - Flexible DC electric network's circuit breaker mixing arrangement - Google Patents
Flexible DC electric network's circuit breaker mixing arrangement Download PDFInfo
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- CN205666617U CN205666617U CN201620441109.3U CN201620441109U CN205666617U CN 205666617 U CN205666617 U CN 205666617U CN 201620441109 U CN201620441109 U CN 201620441109U CN 205666617 U CN205666617 U CN 205666617U
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- 230000005611 electricity Effects 0.000 description 5
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- 238000010276 construction Methods 0.000 description 3
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Abstract
The utility model relates to a flexible DC electric network's circuit breaker mixing arrangement, it is including sending the end current conversion station, receiving end current conversion station, direct current reactor, mechanical type fast switch and the direct current breaker of accuse type entirely, lieing in and sending end current conversion station line side, every output that send the end current conversion station all connects one by first branch road first, that two mechanical type fast switchs of second are established ties and are constituted through a direct current reactor, the parallelly connected one second branch road of establishing ties and constituting by third, two mechanical type fast switchs of fourth, first accuse type full direct current breaker between the two first branch roads, lieing in and receiving end current conversion station line side, each receives end current conversion station input all to connect the 2nd direct current reactor one end, establishes ties the third branch road that constitutes by second accuse type full direct current breaker and the 5th mechanical type fast switch and is connected the 2nd direct current reactor other end, the parallelly connected one fourth branch road of establishing ties and constituting by third, two direct current breaker of accuse type entirely of fourth between the two third branch roads. The utility model discloses can extensively use in the flexible direct current transmission of high pressure net.
Description
Technical field
This utility model relates to a kind of chopper mixing arrangement, and the chopper especially with regard to a kind of flexible direct current electrical network mixes
Locking device.
Background technology
At present, the high pressure flexible direct current transmission of electricity using modularization multi-level converter (MMC) is to solve extensive new forms of energy
Concentrate the important channel sent outside.As a example by the area, Zhangbei County of China, the wind-powered electricity generation of Zhangbei County and area, Kangbao County to be passed through flexible direct current
The outer Fengning delivering to Beijing and Ji Bei is concentrated in transmission of electricity, needs to build four end flexible DC power transmission nets.Flexible direct current electrical network is used to enter
During row long distance power transmission, it is considered to economy, direct current cables should not be used between current conversion station, and direct current overhead transmission line should be used.Directly
The application of stream overhead transmission line increases the probability that DC side breaks down.
In order to quickly remove the fault of direct current network, it is ensured that direct current network runs on island mode or alternating current-direct current constellation
Under reliability, dc circuit breaker need to be installed in direct current network.Applicable dc circuit breaker is divided into two kinds, and one is machinery
Formula high-speed switch, another kind is full-control type dc circuit breaker.Mechanical type high-speed switch does not has electric arc connecting-disconnecting function, and cost is relatively low；
Full-control type dc circuit breaker has and cut-offs electric arc ability, involves great expense.Both dc circuit breakers can be in conjunction with different types of
Current conversion station submodule uses.
The inverter being typically based on MMC has two class sub modular structures, and a class is full-bridge sub modular structure (as shown in Figure 1a),
Another kind of is half-bridge sub modular structure (as shown in Figure 1 b).Full bridge structure compared with half-bridge structure, full bridge structure have pass through straight
Stream failures, the most only needs to configure mechanical type high-speed switch, but needs locking current conversion station during fault.Half-bridge structure is without DC Line Fault
Ride-through capability, it is therefore desirable to configuration full-control type dc circuit breaker excise fault, but excise fault time can not locking inverter.
If all current conversion stations use full-bridge submodule in direct current network, there is to need during DC Line Fault the change of current of locking the whole network
Stand and remove fault, whole direct current network can be caused to stop transport in short-term；If all current conversion stations use half-bridge submodule, need corresponding configuration complete
Control type dc circuit breaker, cut-off breaker during DC Line Fault, it is not necessary to locking current conversion station.But full-control type dc circuit breaker cost
High, when current conversion station number is bigger in direct current network, the quantity required of full-control type dc circuit breaker will be significantly greatly increased, reduce work
The economy of journey.There is no at present and Fast mechanical switch and full-control type dc circuit breaker, full-bridge inverter and half-bridge inverter are existed
The case being used in mixed way in straight-flow system.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide the chopper mixing arrangement of a kind of flexible direct current electrical network,
It can make full use of full-bridge and the structure of half-bridge submodule according to electric network composition while ensureing direct current network transmission reliability
Feature, with the use of Fast mechanical switch and full-control type dc circuit breaker, improves the economy of direct current network.
For achieving the above object, this utility model takes techniques below scheme: the chopper of a kind of flexible direct current electrical network mixes
Locking device, it is characterised in that: this device includes some sending end current conversion stations and some receiving end current conversion stations, with containing two described sending ends
Current conversion station, two described receiving end current conversion stations four end flexible direct current electrical networks as a example by, also include four direct current reactors, some machinery
Formula high-speed switch and some full-control type dc circuit breakers；It is positioned at described sending end current conversion station line side, each described sending end current conversion station
Outfan all connect one by first, second two described mechanical type high-speed switches series connection structures through direct current reactor described in first
The first branch road become；In parallel one by the three, the 4th two described mechanical type high-speed switches, the first institutes between first branch road described in two
State the second branch road that full-control type dc circuit breaker is in series；Being positioned at described receiving end current conversion station line side, each described receiving end is changed
Stream station input all connects direct current reactor one end described in second, by machine described in full-control type dc circuit breaker and the 5th described in second
The direct current reactor other end described in the 3rd branch road connection second that tool formula high-speed switch is in series；Described in two between the 3rd branch road
In parallel one by the three, the 4th two the 4th branch roads that described full-control type dc circuit breaker is in series.
Preferably, in described second branch road, mechanical type high-speed switch one end described in the 3rd connects wherein described in one first
In branch road at first, second liang of described mechanical type high-speed switch junction point；The mechanical type high-speed switch other end described in 3rd is through
Full-control type dc circuit breaker described in one connects mechanical type high-speed switch one end described in the 4th, and described in the 4th, mechanical type high-speed switch is another
One end connects in another described first branch road at first, second liang of described mechanical type high-speed switch junction point.
Preferably, in described 4th branch road, full-control type dc circuit breaker one end described in the 3rd connects described in one the 3rd
In road at mechanical type high-speed switch junction point described in full-control type dc circuit breaker and the 5th described in second；Full-control type described in 3rd is straight
Stream chopper other end via line connects full-control type dc circuit breaker one end described in the 4th, full-control type dc circuit breaker described in the 4th
The other end connects mechanical type high-speed switch described in full-control type dc circuit breaker and the 5th described in second in another described 3rd branch road
At junction point.
Preferably, two described sending end current conversion stations all use full-bridge submodule inverter, and two described receiving end current conversion stations are equal
Use half-bridge submodule inverter.
This utility model is owing to taking above technical scheme, and it has the advantage that 1, this utility model is bipolar soft
In property direct current network, choppers all with prior art all use compared with the configuration mode of full-control type dc circuit breaker, permissible
Six full-control type dc circuit breakers of configuration, have been greatly saved construction investment less.2, this utility model is installed between sending end current conversion station
Full-control type dc circuit breaker, can be time in the two current conversion station, any one breaks down, and fast and reliable ground disconnects two and changes
Electrical link between stream station, it is ensured that non-faulting current conversion station continues reliably to transmit electricity.3, this utility model fills according to electric network composition
Divide and utilize full-bridge and the construction features of half-bridge submodule, make the mechanical type high-speed switch sending receiving end close with full-control type dc circuit breaker
Cut cooperation, while ensureing direct current network transmission reliability, reduce construction costs.In sum, this utility model can be extensive
High pressure flexible direct current power transmission network is applied.
Accompanying drawing explanation
Fig. 1 a is flexible direct current converter station full-bridge sub modular structure schematic diagram in prior art；
Fig. 1 b is flexible direct current converter station half-bridge sub modular structure schematic diagram in prior art；
Fig. 2 is overall structure schematic diagram of the present utility model.
Detailed description of the invention
With embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
As in figure 2 it is shown, this utility model provides the chopper mixing arrangement of a kind of flexible direct current electrical network, use machinery simultaneously
Formula high-speed switch and full-control type dc circuit breaker, it includes some sending end current conversion stations 1 and some receiving end current conversion stations 2, with containing two
Individual sending end current conversion station, two receiving end current conversion stations four end flexible direct current electrical networks as a example by this utility model is described in detail.
This utility model, except two sending end current conversion stations 1 and two receiving end current conversion stations 2, also includes four direct current reactors 3, some machinery
Formula high-speed switch 4 and some full-control type dc circuit breakers 5.
Being positioned at sending end current conversion station 1 line side, the outfan of each sending end current conversion station 1 is through the first direct current reactor 3 even
Connect one by first, second two mechanical type high-speed switches 4, first branch road in series；Between two first branch roads, in parallel one by the
Three, the second branch road that 4, first full-control type dc circuit breaker 5 of the 4th two mechanical type high-speed switch is in series.This second
In branch road, in the 3rd mechanical type high-speed switch 4 one end connection wherein one first branch road, first, second liang of mechanical type high-speed switch is even
Junction；3rd mechanical type high-speed switch 4 other end connects the 4th mechanical type through first full-control type dc circuit breaker 5 and quickly opens
Closing 4 one end, the 4th mechanical type high-speed switch 4 other end connects first, second liang of mechanical type high-speed switch 4 in another first branch road
At junction point.
Being positioned at receiving end current conversion station 2 line side, each receiving end current conversion station 2 input all connects second direct current reactor 3 one end,
Threeth branch road in series with the 5th mechanical type high-speed switch 4 by the second full-control type dc circuit breaker 5 is connected the second unidirectional current
Anti-device 3 other end.Between two the 3rd branch roads in parallel one by the 3rd, the 4th two full-control type dc circuit breaker 5 in series the
Four branch roads.In the 4th branch road, the 3rd full-control type dc circuit breaker 5 one end connects the second full-control type direct current in one the 3rd branch road
At chopper 5 and the 5th mechanical type high-speed switch 4 junction point；3rd full-control type dc circuit breaker 5 other end via line connects the
Four full-control type dc circuit breaker 5 one end, the 4th full-control type dc circuit breaker 5 other end connects in another the 3rd branch road second and entirely controls
At type dc circuit breaker 5 and the 5th mechanical type high-speed switch 4 junction point.
In above-described embodiment, two sending end current conversion stations 1 all use full-bridge submodule inverter, and two receiving end current conversion stations 2 are equal
Use half-bridge submodule inverter.
This utility model also provides for a kind of chopper mixed configuration method of flexible direct current electrical network, and it comprises the following steps:
1) arranging some sending end current conversion stations 1 and some receiving end current conversion stations 2, each receiving end current conversion station 2 all uses half-bridge submodule
Block inverter, each sending end current conversion station 1 all uses full-bridge submodule inverter.
2) it is sequentially connected with first, second liang of mechanical type near line side first direct current reactor 3 of sending end current conversion station 1 fast
Speed switch 4, connects through the second direct current reactor the 3, the 5th mechanical type high-speed switch 4 successively near the line side of receiving end current conversion station 2
Second full-control type dc circuit breaker 5；
3) being positioned at sending end current conversion station 1 side, between adjacent two sending end current conversion stations 1, in parallel one by the three, the 4th two machineries
The second branch road that 4, first full-control type dc circuit breaker 5 of formula high-speed switch is in series；In this second branch road, the 3rd machinery
Formula high-speed switch 4 one end connects at first, second liang of mechanical type high-speed switch 4 junction point of sending end current conversion station 1 side, the 3rd machine
Tool formula high-speed switch 4 other end connects the 4th mechanical type high-speed switch 4 one end through first full-control type dc circuit breaker 5, and the 4th
Mechanical type high-speed switch 4 other end connects first, second liang of mechanical type high-speed switch 4 junction point of another sending end current conversion station 1 side
Place.
4) being positioned at receiving end current conversion station 2 side, between adjacent two receiving end current conversion stations 2, in parallel one by the three, the 4th two full controls
The 4th branch road that type dc circuit breaker 5 is in series；In the 4th branch road, the 3rd full-control type dc circuit breaker 5 one end connects
At second full-control type dc circuit breaker 5 of one receiving end current conversion station side and the 5th mechanical type high-speed switch 4 junction point, the 3rd full-control type
Dc circuit breaker 5 other end via line connect the 4th full-control type dc circuit breaker 5 one end, the 4th full-control type dc circuit breaker another
End connects at the second full-control type dc circuit breaker 5 and the 5th mechanical type high-speed switch 4 junction point of another receiving end current conversion station side.
In above steps, the full-bridge submodule inverter that sending end current conversion station 1 uses has removing failures, if wherein
DC line between one sending end current conversion station and a receiving end current conversion station breaks down, and hereinafter referred to as this sending end current conversion station is that fault is sent
End current conversion station, receiving end current conversion station are fault receiving end current conversion station；Then this fault sending end current conversion station can occur locking, removes the mistake of fault
Journey is as follows:
(1) fault occurs；
(2) locking fault sending end current conversion station；
(3) full-control type dc circuit breaker between tripping faulty line sending end current conversion station-adjacent normal sending end current conversion station, event
The full-control type dc circuit breaker of barrier sending end current conversion station-fault receiving end current conversion station；
(4) pull open fault sending end current conversion station-fault receiving end current conversion station permanent way machine formula high-speed switch, remove fault；
(5) quick coincidence faulty line sending end current conversion station-adjacent normal sending end current conversion station circuit full-control type dc circuit breaker；
(6) faulty line sending end current conversion station is restarted.
If breaking down in a certain sending end current conversion station, then fault clearance process is as follows:
(1) fault occurs；
(2) locking faulty line sending end current conversion station；
(3) tripping faulty line sending end current conversion station-adjacent normal sending end current conversion station and fault sending end current conversion station-fault receiving end
The full-control type dc circuit breaker of current conversion station；
(4) tripping faulty line sending end current conversion station outfan mechanical type high-speed switch；
(5) coincidence faulty line sending end current conversion station-adjacent normal sending end current conversion station and fault sending end current conversion station-fault receiving end
The full-control type dc circuit breaker of current conversion station.
Embodiment: as a example by the flexible direct current electricity power engineering of area, Zhangbei County, as shown in Figure 2.Build 4 soft straight current conversion stations, rich
Peace Beijing current conversion station uses half-bridge inverter, Zhangbei County's current conversion station and Kangbao County's current conversion station to use full-bridge scheme.Zhangbei County-Beijing circuit
Side, Beijing, Kangbao County-side, circuit Fengning, Fengning, Beijing-circuit both sides, Fengning, full-control type direct current is installed between Kangbao County-Zhangbei County's circuit
Chopper.The outlet of each current conversion station, Kangbao County-circuit both sides, Zhangbei County, Kangbao County-Fengning, Zhangbei County-Beijing circuit head end configuration mechanical type is fast
Speed dc switch.
Zhangbei County and Kangbao County's current conversion station use full-bridge inverter, have removing failures.Assume direct current between Kangbao County and Fengning
Line failure, Kangbao County's standing-meeting generation locking, then the process removing fault is as follows:
(1) fault occurs；
(2) locking Kangbao County station current conversion station；
(3) tripping Kangbao County-Zhangbei County's circuit and the full-control type dc circuit breaker of Kangbao County-Fengning circuit；
(4) pull open Kangbao County-Fengning permanent way machine formula high-speed switch, remove fault；
(5) quickly overlap Kangbao County-Zhangbei County's circuit full-control type dc circuit breaker；
(4) Kangbao County's current conversion station current conversion station is restarted.
If breaking down in Kangbao County's current conversion station, fault clearance process is as follows:
(1) fault occurs；
(2) locking Kangbao County station current conversion station；
(3) tripping Kangbao County-Zhangbei County's circuit and Kangbao County-Fengning circuit full-control type dc circuit breaker；
(4) tripping Kangbao County current conversion station current conversion station outlet mechanical type high-speed switch；
(5) coincidence Kangbao County-Zhangbei County's circuit and Kangbao County-Fengning circuit full-control type dc circuit breaker.
The various embodiments described above are merely to illustrate this utility model, the structure of each parts, size, arrange position and shape is all
Can be varied from, on the basis of technical solutions of the utility model, all according to this utility model principle, individual part be entered
The improvement of row and equivalents, the most should not get rid of outside protection domain of the present utility model.
Claims (4)
1. the chopper mixing arrangement of a flexible direct current electrical network, it is characterised in that: this device include two sending end current conversion stations and
Two receiving end current conversion stations, also include four direct current reactors, some mechanical type high-speed switches and some full-control type dc circuit breakers；
Being positioned at described sending end current conversion station line side, the outfan of each described sending end current conversion station is through direct current reactance described in first
Device connects one by first, second two described mechanical type high-speed switches the first branch road in series；First branch road described in two it
Between in parallel one in series by the three, the 4th two described mechanical type high-speed switches, full-control type dc circuit breaker described in first
Second branch road；
Being positioned at described receiving end current conversion station line side, each described receiving end current conversion station input all connects direct current reactor described in second
One end, threeth branch road in series by mechanical type high-speed switch described in full-control type dc circuit breaker and the 5th described in second connects
The direct current reactor other end described in second；Described in two, between the 3rd branch road, parallel connection one is straight by the three, the 4th two described full-control types
The 4th branch road that stream chopper is in series.
The chopper mixing arrangement of a kind of flexible direct current electrical network the most as claimed in claim 1, it is characterised in that: described second
In branch road, first, second liang of described machinery in connection wherein the first branch road described in mechanical type high-speed switch one end described in the 3rd
At formula high-speed switch junction point；Described in 3rd, the mechanical type high-speed switch other end connects through full-control type dc circuit breaker described in first
Mechanical type high-speed switch one end described in 4th, the mechanical type high-speed switch other end described in the 4th connects in another described first branch road
At first, second liang of described mechanical type high-speed switch junction point.
The chopper mixing arrangement of a kind of flexible direct current electrical network the most as claimed in claim 1, it is characterised in that: the described 4th
In branch road, full-control type dc circuit breaker one end described in the 3rd connects full-control type direct current interruption described in second in the 3rd branch road described in
At mechanical type high-speed switch junction point described in device and the 5th；Full-control type dc circuit breaker other end via line described in 3rd connects the
Full-control type dc circuit breaker one end described in four, the full-control type dc circuit breaker other end described in the 4th connects another described 3rd branch road
In at mechanical type high-speed switch junction point described in full-control type dc circuit breaker and the 5th described in second.
4. the chopper mixing arrangement of a kind of flexible direct current electrical network as described in claims 1 to 3 is arbitrary, it is characterised in that: two
Individual described sending end current conversion station all uses full-bridge submodule inverter, two described receiving end current conversion stations all to use the half-bridge submodule change of current
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620441109.3U CN205666617U (en) | 2016-05-16 | 2016-05-16 | Flexible DC electric network's circuit breaker mixing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620441109.3U CN205666617U (en) | 2016-05-16 | 2016-05-16 | Flexible DC electric network's circuit breaker mixing arrangement |
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| Publication Number | Publication Date |
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| CN205666617U true CN205666617U (en) | 2016-10-26 |
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| CN201620441109.3U Active CN205666617U (en) | 2016-05-16 | 2016-05-16 | Flexible DC electric network's circuit breaker mixing arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437795A (en) * | 2017-09-20 | 2017-12-05 | 南方电网科学研究院有限责任公司 | The pole ESOF control methods and Hybrid HVDC system of Hybrid HVDC system |
| CN114467161A (en) * | 2019-11-29 | 2022-05-10 | 株式会社东芝 | Direct current breaker |
-
2016
- 2016-05-16 CN CN201620441109.3U patent/CN205666617U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437795A (en) * | 2017-09-20 | 2017-12-05 | 南方电网科学研究院有限责任公司 | The pole ESOF control methods and Hybrid HVDC system of Hybrid HVDC system |
| CN107437795B (en) * | 2017-09-20 | 2020-06-26 | 南方电网科学研究院有限责任公司 | Polar ESOF control method for hybrid direct-current power transmission system and hybrid direct-current power transmission system |
| CN114467161A (en) * | 2019-11-29 | 2022-05-10 | 株式会社东芝 | Direct current breaker |
| CN114467161B (en) * | 2019-11-29 | 2024-03-08 | 株式会社东芝 | DC circuit breaker |
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