CN208571623U - Offshore wind power flexible DC power transmission system with energy consumption dc chopper - Google Patents
Offshore wind power flexible DC power transmission system with energy consumption dc chopper Download PDFInfo
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- CN208571623U CN208571623U CN201821315587.5U CN201821315587U CN208571623U CN 208571623 U CN208571623 U CN 208571623U CN 201821315587 U CN201821315587 U CN 201821315587U CN 208571623 U CN208571623 U CN 208571623U
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- energy consumption
- chopper
- transmission system
- direct current
- converter station
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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 a kind of offshore wind power flexible DC power transmission systems with energy consumption dc chopper.The purpose of the utility model is to provide a kind of safe and reliable, economic offshore wind power flexible DC power transmission systems with energy consumption dc chopper.The technical solution of the utility model is: the system includes marine wind electric field, the marine sending end change of current and land receiving end converter station, and marine wind electric field successively accesses AC network through the marine sending end change of current, direct current sea cable and land receiving end converter station；The DC transmission system uses the symmetrical monopolar mode of connection, is connected between the sea sending end converter station and the land receiving end converter station using two direct current sea cables；Energy consumption dc chopper is connected between two direct current sea cables, energy consumption dc chopper by several energy consumption resistors and it is several can DC voltage increase when fast conducting, can be rapidly switched off when DC voltage restores normal conducting switch be composed in series, the centre-point earth of the energy consumption dc chopper.
Description
Technical field
The utility model relates to a kind of offshore wind power flexible DC power transmission systems with energy consumption dc chopper.It is suitable for
Marine wind electric field field of power transmission.
Background technique
Flexible DC transmission technology is the transmission of electricity new technology developed in the recent period, is had many advantages, especially suitable for large capacity,
The grid-connected power transmission of remote marine wind electric field.China has built several land flexible direct current science and technology demonstrative projects at present, but
Marine wind electric field flexible DC transmission is at home or blank.
Large capacity, remote marine wind electric field have system stabilization, operation side using flexible DC transmission technology submitting
Formula is flexible, active reactive independent control, flexible adjustment, and ac and dc systems are independently of each other, on ac grid system without influence, equipment
Many advantages, such as small, marine usage area is few is lost.
But due to mutually isolated between wind power plant and receiving end AC network, the failure of receiving end AC network is not transferred to wind
Electric field side, when it is land by end station exchange side break down when, ac bus voltage reduce, cause by end station power send out be obstructed,
And sending end station continues to receive the active power of marine wind electric field input, so as to cause the raising of DC side system voltage, causes direct current
The failure of side.How to realize land receiving end side fault in ac transmission system cause short-time rating submitting be obstructed caused by direct current system electricity
Raised fault traversing is pressed, the key technical problem of offshore wind power flexible DC power transmission System Development is had become.
Summary of the invention
Technical problem to be solved by the utility model is: in view of the above problems, providing a kind of safe and reliable, warp
The offshore wind power flexible DC power transmission system with energy consumption dc chopper of Ji.
The technical scheme adopted by the utility model is a kind of offshore wind farm flexible direct current with energy consumption dc chopper
Transmission system, it is characterised in that: including marine wind electric field, the marine sending end change of current and land receiving end converter station, marine wind electric field according to
It is secondary to access AC network through the marine sending end change of current, direct current sea cable and land receiving end converter station；
The DC transmission system uses the symmetrical monopolar mode of connection, and the sea sending end converter station is changed with the land receiving end
Using two direct current sea cable connections between stream station；
Energy consumption dc chopper is connected between two direct current sea cables, the dc chopper that consumes energy is by several energy consumption resistors
It fast conducting, the conducting that can be rapidly switched off when DC voltage restores normal can be switched when DC voltage increases with several
It is composed in series, the centre-point earth of the energy consumption dc chopper.
The conducting switch is composed in parallel by IGBT element and backward dioded.
The central point of energy consumption resistor and conducting switch about the energy consumption dc chopper on the energy consumption dc chopper
It is arranged symmetrically.
The energy consumption dc chopper is set to the direct current sea cable point of incoming cables of the land receiving end converter station.
Tietransformer I, converter valve I and bridge arm reactor I are disposed in the sea sending end converter station.
Tietransformer II, converter valve II and bridge arm reactor II are disposed in the land receiving end converter station.
The beneficial effects of the utility model are: the utility model solve offshore wind power flexible DC power transmission system terrestrial by
End side fault in ac transmission system cause in short-term active power submitting be obstructed caused by direct current system voltage increase the problem of, realize
Fault traversing avoids the extension of accident.
The utility model is switched using IGBT element and backward dioded as conducting, can control energy consumption dc chopper
Can in direct current system quickly and effectively turn-on and turn-off.The dc chopper that consumes energy is arranged in DC side, avoids instantaneous straight
Galvanic electricity pressure is raised to be influenced to by end station converter valve.The dc chopper that consumes energy is arranged by land by end station side, avoids at sea sending
The problems such as device bring invests increase and difficult O&M is set in end station.
Detailed description of the invention
Fig. 1 is the electrical wiring schematic diagram of embodiment.
Specific embodiment
As shown in Figure 1, the present embodiment is to have with the offshore wind power flexible DC power transmission system of energy consumption dc chopper
Land receiving end converter station 2, direct current sea cable 4, the marine sending end change of current 5 and marine wind electric field 6, marine wind electric field 6 are successively sent through sea
The change of current 5, direct current sea cable 4 and land receiving end converter station 2 is held to access AC network 1.
The present embodiment is at sea equipped with a marine sending end converter station 5, is electrically connected with marine wind electric field 6, marine wind electric field 6
Electric energy be pooled to marine sending end converter station 5, sent by subsea DC cable 4 to land after rectified.Marine sending end converter station 5
The equipment such as interior arrangement tietransformer I 501, converter valve I 502, bridge arm reactor I 503.
It is equipped with a land receiving end converter station 2 by land, the electric energy of marine side accesses land receiving end by direct current sea cable 4 and changes
Stream station 2, accesses AC network 1 after inversion.Arrangement tietransformer II 201 in land receiving end converter station 2, converter valve II 202,
The equipment such as bridge arm reactor II 203.
DC transmission system uses symmetrical monopolar wiring, marine sending end converter station 5 and the land receiving end change of current in the present embodiment
It stands and is connected using two direct current sea cables 4 between 2.
Energy consumption dc chopper 3 is arranged in 2 direct current sea cable of receiving end converter station, 4 point of incoming cables to this example by land, and consume energy DC chopped-wave
3 one end of device is connected to the direct current sea cable 4 of side of the positive electrode, another direct current sea cable 4 for being terminated at negative side, the energy consumption dc chopper center
Point ground connection 303.
Dc chopper 3 is consumed energy in the present embodiment mainly by 302 series connection group of several conducting switches 301 and several energy consumption resistors
At the central point pair of energy consumption resistor 302 and conducting switch 301 about the energy consumption dc chopper to consume energy on dc chopper 3
Claim arrangement, switch 301 is connected and energy consumption resistor 302 need to be according to resistance to voltage levels and energy consumption demand multiple groups series connection.Conducting 301, switch
On or off is realized according to the voltage levels of DC side, and the fast conducting when DC voltage increases can be extensive in DC voltage
It is rapidly switched off when multiple normal.Switch 301 is connected in this example to be composed in parallel by IGBT element 3011 and backward dioded 3012.
The working principle of the present embodiment is as follows: when land receiving end converter station 2 exchange side is broken down, ac bus voltage
It reduces, land 2 active power of receiving end converter station submitting is caused to be obstructed, and marine sending end converter station 5 continues to receive marine wind electric field 6
The active power of input causes the failure of DC side, consume energy dc chopper at this time so as to cause the raising of DC side system voltage
Conducting 301 fast conducting of switch in 3 seals in energy consumption dc chopper 3 between two loop line roads of direct current positive and negative anodes, passes through
Energy consumption resistor 302 in energy consumption dc chopper 3 consumes the energy that can not be sent out in short-term, and DC bus-bar voltage quickly recovers to just
After ordinary water is flat, conducting switch 301 is rapidly switched off, and energy consumption dc chopper 3 is out of service；When DC side system voltage increases again
When, energy consumption dc chopper 3 puts into operation again, reciprocal with this, until land 2 fault in ac transmission system of receiving end converter station remove or
The load of marine wind electric field 6 is cut off, direct current system voltage remains within the scope of normal level, realizes fault traversing.
Certainly, above description is not limitation of the utility model, and the utility model is also not limited to the example above, this skill
The those of ordinary skill in art field, in the scope of the utility model, variation, addition or the replacement made all should belong to this reality
With novel protection scope.
Claims (6)
1. a kind of offshore wind power flexible DC power transmission system with energy consumption dc chopper, it is characterised in that: including sea turn
Electric field (6), marine sending end converter station (5) and land receiving end converter station (2), marine wind electric field (6) is successively through the marine sending end change of current
It stands (5), direct current sea cable (4) and land receiving end converter station (2) access AC network (1)；
The DC transmission system uses the symmetrical monopolar mode of connection, and the sea sending end converter station (5) is changed with the land receiving end
Using two direct current sea cable (4) connections between stream station (2)；
It is connected to energy consumption dc chopper (3) between two direct current sea cables (4), consumes energy dc chopper (3) if by drying loss
Can resistance (302) and it is several can DC voltage increase when fast conducting, can DC voltage recovery it is normal when quickly close
Disconnected conducting switch (301) is composed in series, the centre-point earth of the energy consumption dc chopper.
2. offshore wind power flexible DC power transmission system according to claim 1, it is characterised in that: the conducting switch
(301) it is composed in parallel by IGBT element (3011) and backward dioded (3012).
3. offshore wind power flexible DC power transmission system according to claim 1 or 2, it is characterised in that: the energy consumption direct current
The center point symmetry cloth of energy consumption resistor (302) and conducting switch (301) about the energy consumption dc chopper on chopper (3)
It sets.
4. offshore wind power flexible DC power transmission system according to claim 3, it is characterised in that: the energy consumption DC chopped-wave
Device (3) is set to direct current sea cable (4) point of incoming cables of the land receiving end converter station (2).
5. offshore wind power flexible DC power transmission system according to claim 1, it is characterised in that: the sea sending end change of current
Standing, (5) are interior to be disposed with tietransformer I (501), converter valve I (502) and bridge arm reactor I (503).
6. offshore wind power flexible DC power transmission system according to claim 1, it is characterised in that: the land receiving end change of current
Standing, (2) are interior to be disposed with tietransformer II (201), converter valve II (202) and bridge arm reactor II (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821315587.5U CN208571623U (en) | 2018-08-15 | 2018-08-15 | Offshore wind power flexible DC power transmission system with energy consumption dc chopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821315587.5U CN208571623U (en) | 2018-08-15 | 2018-08-15 | Offshore wind power flexible DC power transmission system with energy consumption dc chopper |
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| Publication Number | Publication Date |
|---|---|
| CN208571623U true CN208571623U (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821315587.5U Active CN208571623U (en) | 2018-08-15 | 2018-08-15 | Offshore wind power flexible DC power transmission system with energy consumption dc chopper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767890A (en) * | 2018-08-15 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power flexible DC power transmission system and its fault ride-through method with energy consumption dc chopper |
| CN111404189A (en) * | 2020-04-17 | 2020-07-10 | 南方电网科学研究院有限责任公司 | Method, system and equipment for rapidly reducing output power of flexible direct current power transmission system |
| CN115296322A (en) * | 2022-07-06 | 2022-11-04 | 国网经济技术研究院有限公司 | Offshore wind power grid-connected flexible direct current electric main wiring system and maintenance method thereof |
-
2018
- 2018-08-15 CN CN201821315587.5U patent/CN208571623U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767890A (en) * | 2018-08-15 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power flexible DC power transmission system and its fault ride-through method with energy consumption dc chopper |
| CN111404189A (en) * | 2020-04-17 | 2020-07-10 | 南方电网科学研究院有限责任公司 | Method, system and equipment for rapidly reducing output power of flexible direct current power transmission system |
| CN111404189B (en) * | 2020-04-17 | 2021-11-02 | 南方电网科学研究院有限责任公司 | Method, system and equipment for rapidly reducing output power of flexible direct current power transmission system |
| CN115296322A (en) * | 2022-07-06 | 2022-11-04 | 国网经济技术研究院有限公司 | Offshore wind power grid-connected flexible direct current electric main wiring system and maintenance method thereof |
| CN115296322B (en) * | 2022-07-06 | 2023-03-24 | 国网经济技术研究院有限公司 | Offshore wind power grid-connected flexible direct current electric main wiring system and maintenance method thereof |
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