CN107634543A - A kind of offshore wind farm booster system and step-up method - Google Patents
A kind of offshore wind farm booster system and step-up method Download PDFInfo
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- CN107634543A CN107634543A CN201711167215.2A CN201711167215A CN107634543A CN 107634543 A CN107634543 A CN 107634543A CN 201711167215 A CN201711167215 A CN 201711167215A CN 107634543 A CN107634543 A CN 107634543A
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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
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Abstract
The present invention discloses a kind of offshore wind farm booster system, and the system includes：Marine wind electric field, it includes some sea turn motors；First transformer, its circuit connect the output end of sea turn motor, and the exit potential of sea turn motor is boosted；Offshore boosting station, its circuit connect the first transformer output end, and the output to the first transformer boosts to 220V；Land transformer station, its circuit connect the output end of offshore boosting station.After wind-driven generator exit potential of the present invention is by transformer boost, directly boosted through high-tension transformer, then it is joined directly together by submarine cable and land switchyard, by improving conveying voltage class and transmission capacity, energy loss of the offshore wind farm system in course of conveying is reduced, reduces periodic inspection and maintenance cost；The laying quantity and maritime transformer station floor space of submarine cable are reduced, realizes the combination of offshore wind farm system economy, reliability and environment friendly.
Description
Technical field
The present invention relates to offshore wind farm interconnection technology field, and in particular to a kind of sea turn theoretical based on distributed boosting
Electric boost system and step-up method.
Background technology
At present, offshore wind farm grid entry point and mode select mainly to consider transmission capacity, fed distance, economy, reliability,
The factors such as environment friendly, offshore wind farm is grid-connected in world wide is broadly divided into high-voltage alternating（HVAC）, HVDC（HVDC）
Two major classes, therefore, according to different access system modes, boosting platform typically divides AC boosting platform and DC converter platform.
When the scale of marine wind electric field is relatively small and wind field bank off sea apart from it is near when, Wind turbines typically use alternating current
The power transmission mode access land power network of cable, and consider to install the dynamic reactive compensation device of certain capacity additional, this kind of wind power plant is not required to set
Maritime transformer station is put, suitable for early stage, coastal waters, the marine wind electric field of scale is smaller.
For large-scale remote marine wind electric field, in order to improve efficiency of transmission, voltage class need to be improved, is handed over by sea
Booster stations are flowed, by the way that the power of Wind turbines is collected into rise voltage, then are transported to by submarine cable in land collection control
The heart, depends primarily on the installation scale of wind power plant, offshore distance and the voltage class of points of common connection on the bank, which it is main
Feature is that electrical power transmission system efficiency is higher.
Due to the influence of ac cable charging current, transmission capacity and transmission range are restricted, with marine wind field
Constantly expand, the advantage of direct current transportation is more and more obvious, can greatly reduce line loss and increase transmission capacity, foreign study result table
For bright marine wind electric field offshore distance of working as more than 40~70 km, capacity preferably sends out scheme, greatly in 400 more than MW using direct current
The single marine current conversion station in part summarizes the power of adjacent same size sea wind field, concentrates and sends out, relative to improve economy.
Built marine current conversion station 1 at present, is building 6, is being respectively positioned on Germany, although using the change of current in the marine wind field of operation
The ratio stood is not high, and only 1%, but in the engineering built, 22% is up to using the wind field of current conversion station, ascendant trend is very bright
It is aobvious.With the large-scale development of China's offshore wind farm, it is necessary to the grid-connected of offshore wind farm is furtherd investigate, proposes sea turn
The grid-connected solution of electricity, the grid-connected and access system design of specification offshore wind farm, realizes the sustainable development of offshore wind farm.
Counted with reference to domestic and international marine wind electric field AC and DC synchronizing mode present Research and offshore grid-connected wind farm present situation
Situation, on the basis of scheme Economic contrast is sent out to marine wind electric field alternating current-direct current, marine wind electric field is summed up simultaneously according to document
Net access basic principle：
(1) distance of equal value of 220kV exchanges and flexible direct current reduces with the increase of marine wind electric field scale, i.e. sea turn
Electric field scale is bigger, and its equivalence is apart from smaller.
(2) it is below 400MW marine wind electric fields for construction scale, is adopted in theory when offshore distance is in 100 below km
It is more excellent with exchange program.Actual conditions, sea of the offshore distance within 70 km are built with reference to current marine wind electric field both at home and abroad
Wind power plant recommends to use exchange program；More than 70 km, be considered as in Practical Project grid conditions, Construction of Wind Power scale,
The factors such as construction condition, construction costs, cable type selecting, operation maintenance are made a concrete analysis of.
(3) 600MW marine wind electric field is exceeded for construction scale, when offshore distance is in 50 more than km, using straight
Stream scheme is sent out may be more excellent.
(4) determination of alternating current-direct current scheme and marine wind electric field construction scale, wind power plant offshore distance, equipment manufacturing cost etc. have directly
Relation is connect, should preferably be compared with reference to actual conditions in Practical Project.
Such as Fig. 1 and with reference to shown in Fig. 2, according to mentioned above principle as can be seen that coastal waters offshore wind farm typically takes exchange program,
And in the practical application of engineering, two-stage boost mode is typically chosen again.That is wind-driven generator after low-tension transformer boosts, then
Boosted by high-tension transformer, land transformer station is then transferred to by submarine cable again.
The content of the invention
The present invention provides a kind of offshore wind farm booster system and step-up method, reduces offshore wind farm system in course of conveying
Energy loss, improve offshore wind farm system economy；Number transformer in maritime transformer station is reduced, reduces periodic inspection and dimension
The time cost and human cost repaiied；The laying quantity and maritime transformer station floor space of submarine cable are reduced, realizes sea turn
Electric system is environmentally friendly and the combination of economy.
To achieve the above object, the present invention provides a kind of offshore wind farm booster system, is characterized in, the system includes：
Marine wind electric field, it includes some sea turn motors；
First transformer, its circuit connect the output end of sea turn motor, and the exit potential of sea turn motor is boosted；
Offshore boosting station, its circuit connect the first transformer output end, and the output to the first transformer boosts to 220V；
Land transformer station, its circuit connect the output end of offshore boosting station.
Above-mentioned marine wind electric field includes wind turbine on some Taiwan Straits；Wind turbine is correspondingly connected with one first change on per the Taiwan Straits
Depressor.
Above-mentioned marine wind electric field includes wind turbine on some Taiwan Straits, and wind turbine is divided into some groups of marine point of electricity on some Taiwan Straits
Unit, every group of sea separated motor group connect same first transformer.
Connected between above-mentioned offshore boosting station and land transformer station by submarine cable circuit.
Above-mentioned sea turn motor is double-fed blower fan.
A kind of offshore wind farm step-up method, is characterized in, this method includes：
The exit potential of marine wind electric field after the first transformer boost by exporting to offshore boosting station；
Electric energy is boosted to 220V by offshore boosting station, is exported by submarine cable to land transformer station.
When above-mentioned marine wind electric field scale is less than 500MW, then directly export；Marine wind electric field scale is more than or equal to 500MW
When, then the sea turn motor of marine wind electric field is decoupled, send out or sent out after direct current collects respectively.
Above-mentioned marine wind electric field offshore distance is less than or equal to 70 kms, then using ac transmission；Marine wind electric field offshore away from
From more than 70 kms, then using flexible DC power transmission.
Above-mentioned marine wind electric field scale is more than 600MW, defeated using flexible direct current when offshore distance is more than or equal to 50 km
Electricity.
Compared to the prior art a kind of offshore wind farm booster system of the present invention and step-up method, the advantage is that, of the invention
After wind-driven generator exit potential is by transformer boost, directly boosted through high-tension transformer, then pass through submarine cable and land
Upper switch station is joined directly together, and by improving conveying voltage class and transmission capacity, reduces offshore wind farm system in course of conveying
Energy loss, on the basis of offshore wind farm systematic economy cost is directly reduced, improve the electric energy of offshore wind farm system
The utilization ratio of transfer efficiency and offshore wind energy resource, reduce the time cost and human cost of periodic inspection and maintenance；Reduce
The laying quantity of submarine cable and maritime transformer station floor space, realize offshore wind farm system economy, reliability and environment
The combination of friendly.
Brief description of the drawings
Fig. 1 is a kind of two-stage offshore wind farm boost mode schematic diagram of prior art；
Fig. 2 is a kind of two-stage offshore wind farm boost mode schematic diagram of prior art；
Fig. 3 is the structural representation of offshore wind farm booster system of the present invention；
Fig. 4 is the schematic diagram of the case one of prior art sea boost approach；
Fig. 5 is the schematic diagram of the case two of prior art sea boost approach；
Fig. 6 is the schematic diagram of the case three of prior art sea boost approach；
Fig. 7 is the schematic diagram of the case four of prior art sea boost approach；
Fig. 8 is the schematic diagram of the case five of prior art sea boost approach；
Fig. 9 is the schematic diagram of the case six of prior art sea boost approach；
Figure 10 is the schematic diagram of the embodiment one of offshore wind farm booster system of the present invention；
Figure 11 is the schematic diagram of the embodiment two of offshore wind farm booster system of the present invention；
Figure 12 is the schematic diagram of the embodiment three of offshore wind farm booster system of the present invention；
Figure 13 is the schematic diagram of the example IV of offshore wind farm booster system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the invention is further illustrated.
As shown in figure 3, disclosing a kind of distributed offshore wind farm booster system, the system includes：Marine wind electric field 301,
First transformer, offshore boosting station 302 and land transformer station 303.
Marine wind electric field 301 includes some sea turn motors.
The output end of one or several sea turn motors of the first transformer circuit connection marine wind electric field 301, to sea
The exit potential of upper wind turbine carries out low pressure boosting.
The circuit of offshore boosting station 302 connects the first transformer output end, and the output to the first transformer boosts to 220V.
Land transformer station 303 connects the output end of offshore boosting station 302 by submarine cable circuit.
Wherein marine wind electric field 301 includes wind turbine on some Taiwan Straits；One the is correspondingly connected with per wind turbine on the Taiwan Straits
One transformer.Or wind turbine is divided into some groups of sea separated motor groups on some Taiwan Straits, every group of sea separated motor group connection is same
Individual first transformer.
The size of sea turn motor scale directly affects wind power plant and sends out scheme, and marine wind electric field installation scale is relatively small
When, such as 200,300,400 MW when, then directly submarine cable is gone out using a loopback can send out；Such as marine wind electric field installation scale
It is larger, in more than 500MW, then wind power plant is split into several parts, sends out or sent out after direct current collects respectively.
Marine wind electric field is typically considered as exchange submitting or flexible direct current sends out two kinds of synchronizing modes.Marine wind electric field from
Bank is closer to the distance（It is, for example, less than to be equal to 70 kms）When, then it is distant using ac transmission, offshore（It is greater than 70 kms）
When, after technology and economy comparison, then using flexible DC power transmission.
For direct current transportation cost of making thinner, it is proposed that when using flexible DC power transmission, the offshore wind farm of submitting should have necessarily
Development project scale, it is proposed that in 600 more than MW.
At present, submarine cable maximum manufacturing capacity is 1600 square millimeters of section cable, and its operation is manufactured by production firm
The many factors such as ability, transport, offshore construction influence, and submarine cable ability to transmit electricity will not greatly improve in a short time.In exchange 220
When kV transmits electricity, MW of its total transfer capability about 400 or so.
The coastal Net Frame of Electric Network of offshore grid-connected wind farm, the strong degree of power network, have to the access scheme of marine wind electric field
Considerable influence, when considering access voltage class, synchronizing mode of wind power plant etc., access conditions, the electricity of power network should be taken into full account
The adaptability of net.
The invention also discloses a kind of distributed offshore wind farm step-up method, this method specifically comprises the steps of：
S1, the exit potential of marine wind electric field after the first transformer boost by exporting to offshore boosting station.
Electric energy is boosted to 220V by S2, offshore boosting station, is exported by submarine cable to land transformer station.
Wherein, when marine wind electric field scale is less than 500MW, then directly export；Marine wind electric field scale is more than or equal to 500MW
When, then the sea turn motor of marine wind electric field is decoupled, send out or sent out after direct current collects respectively.
Wherein, marine wind electric field offshore distance is less than or equal to 70 kms, then using ac transmission；Marine wind electric field offshore away from
From more than 70 kms, then using flexible DC power transmission.
Wherein, marine wind electric field scale is more than 600MW, defeated using flexible direct current when offshore distance is more than or equal to 50 km
Electricity.
Specific appointed condition is set below, six prior arts and four specific embodiments of the invention is described, to compare
Illustrate the superiority of the present invention program.Case 1- cases 6 are six embodiments of prior art boost approach in table 1 below, 2,
Example 7- examples 10 are respectively embodiment one, embodiment two, embodiment three and the implementation of the distributed marine boost approach of the present invention
Example four.
Condition is：If marine wind electric field total capacity is 300MW, wind-driven generator is double-fed blower fan in wind field, and unit holds
Measure as 6MW, blower fan maximum quantity of often going here and there is 10, is 70Km with coastline distance, and land transformer station is 220kV, fan outlet
Voltage is 6kV.Because wind-power electricity generation has randomness, fluctuation and uncertainty, do not examined during transformer selects
Consider transformer capacity nargin.
Transformer number of units and type table needed for the embodiment one to ten of table 1
The cost Integrated comparative table of 2 embodiment of table one to ten
It can be obtained by table 2, after the distributed boost approach using the present invention, contrast 110kV transmission tariffs and 220kV transmission tariffs,
220kV transmission tariffs seabed transmission line of electricity line loss is significantly reduced, contrast distribution formula transmission tariff and non-distributed transmission of electricity side
Case, distributed transmission tariff transformer platform number substantially reduce, it was demonstrated that the economy of distributed boost approach of the present invention.
It is the case one of prior art sea boost approach such as Fig. 4 and with reference to shown in Tables 1 and 2, the offshore wind farm boosts
In system, marine wind electric field includes wind turbine on 50 Taiwan Straits, and every ten typhoons power generator is a string, and wind turbine is through small on every Taiwan Straits
Capacity transformer, which boosts to, to be transmitted after 35kV to offshore boosting station, offshore boosting station is concentrated to electric energy boost to 220kV after transmit
To land transformer station.
In case one, altogether provided with 50 small capacity transformers, its voltage class is 35kV, rated capacity 6.3MVA, volume
Rated transformation ratio is 38/6.3, open circuit loss 5.24kW, load loss 35kW, short-circuit impedance 7%, no-load current 0.45%.
It is provided with two transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, specified change
Than for 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.40%.
It is the case two of prior art sea boost approach such as Fig. 5 and with reference to shown in Tables 1 and 2, the offshore wind farm boosts
In system, wind turbine is a string on every 5 Taiwan Straits, and wind turbine, which is transmitted after high-power transformer boosts to sea, on every 5 Taiwan Straits rises
Pressure station, concentration are transferred to land transformer station after boosting to 220kV.
In case two, altogether provided with 10 small capacity transformers, its voltage class is 35kV, rated capacity 31.5MVA, volume
Rated transformation ratio is 38/6.3, open circuit loss 17kW, load loss 94kW, short-circuit impedance 8%, no-load current 0.25%.
It is provided with two transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, specified change
Than for 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.40%.
It is the case three of prior art sea boost approach such as Fig. 6 and with reference to shown in Tables 1 and 2, the offshore wind farm boosts
In system, wind turbine is a string on every ten Taiwan Straits, and wind turbine is transmitted to sea after small capacity transformer boosts on every Taiwan Straits opens
Station is closed, land transformer station is transmitted directly to after collecting and boosts to 220kV.
In case three, altogether provided with 50 small capacity transformers, its voltage class is 110kV, rated capacity 6.3MVA, volume
Rated transformation ratio is 110/6.3, open circuit loss 7.4kW, load loss 35kW, short-circuit impedance 10.5%, and no-load current is
0.62%。
It is provided with two transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, specified change
Than for 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.40%.
It is the case four of prior art sea boost approach such as Fig. 7 and with reference to shown in Tables 1 and 2, the offshore wind farm boosts
In system, wind turbine is a string on every 5 Taiwan Straits, and wind turbine is transmitted to sea after high-power transformer boosts on every 5 Taiwan Straits opens
Station is closed, land transformer station is transmitted directly to after collecting and boosts to 220kV.
In case four, altogether provided with 10 small capacity transformers, its voltage class is 110kV, rated capacity 25MVA, volume
Rated transformation ratio is 110/6.3, open circuit loss 20.8kW, load loss 104kW, short-circuit impedance 10.5%, and no-load current is
0.5%。
It is provided with two transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, specified change
Than for 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.40%.
It is the case five of prior art sea boost approach such as Fig. 8 and with reference to shown in Tables 1 and 2, the offshore wind farm boosts
In system, wind turbine is a string on every 10 Taiwan Straits, on every 10 Taiwan Straits wind turbine transmitted after the boosting of separate unit high-power transformer to
Marine switchyard, land transformer station is transmitted directly to after collecting and boosts to 220kV.
In case five, altogether provided with 5 small capacity transformers, its voltage class is 110kV, rated capacity 50MVA, specified
No-load voltage ratio is 110/6.3, open circuit loss 35.2kW, load loss 175kW, short-circuit impedance 10.5%, and no-load current is
0.42%。
It is provided with two transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, specified change
Than for 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.40%.
It is the case six of prior art sea boost approach such as Fig. 9 and with reference to shown in Tables 1 and 2, the offshore wind farm boosts
In system, wind turbine is a string on every 10 Taiwan Straits, and at sea booster stations are collected whole sea turn motors, is directly risen after collecting
220kV is depressed into, then is transmitted through transmission line to land electric substation.
In case six, altogether provided with 2 transformers, its voltage class is 110kV, rated capacity 150MVA, nominal transformation ratio
For 110/6.3, open circuit loss 80.1kW, load loss 399kW, short-circuit impedance 12.5%, no-load current 0.24%.
It is provided with two transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, specified change
Than for 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.40%.
It is the schematic diagram of case seven in Tables 1 and 2 such as Figure 10 and with reference to shown in Tables 1 and 2, discloses sea of the invention
The embodiment one of wind-powered electricity generation booster system, in the offshore wind farm booster system, wind turbine is a string on every 5 Taiwan Straits, in every string blower fan
Offshore boosting station is built in outlet, directly boosts to 220kV, land electric substation is delivered to after marine switchyard collects.
In the embodiment of the present invention one, miniature transformer is not provided with.
It is provided with ten transformers in offshore boosting station, its voltage class is 220kV, rated capacity 31.5MVA, specified change
Than for 220/10.5, open circuit loss 28kW, load loss 128kW, short-circuit impedance 12.50%, no-load current 0.5%.
It is the schematic diagram of case eight in Tables 1 and 2 such as Figure 11 and with reference to shown in Tables 1 and 2, discloses sea of the invention
The embodiment two of wind-powered electricity generation booster system, in the offshore wind farm booster system, wind turbine is a string on every 5 Taiwan Straits, in every string blower fan
Offshore boosting station is built in outlet, is directly boosted to 220kV through high-power transformer, is delivered to after marine switchyard collects land
Electric substation.
In the embodiment of the present invention two, miniature transformer is not provided with.
It is provided with 5 transformers in offshore boosting station, its voltage class is 220kV, rated capacity 63MVA, nominal transformation ratio
For 220/10.5, open circuit loss 39kW, load loss 179kW, short-circuit impedance 12.50%, no-load current 0.52%.
It is the schematic diagram of case nine in Tables 1 and 2 such as Figure 12 and with reference to shown in Tables 1 and 2, discloses sea of the invention
The embodiment three of wind-powered electricity generation booster system, in the offshore wind farm booster system, wind turbine is a string on every 10 Taiwan Straits, whole blower fans
At sea booster stations are collected, and directly boost to 220kV through two transformers after collecting, then transmit to land through transmission line
Electric substation.
In the embodiment of the present invention three, miniature transformer is not provided with.
It is provided with 2 transformers in offshore boosting station, its voltage class is 220kV, rated capacity 150MVA, nominal transformation ratio
For 220/10.5, open circuit loss 89kW, load loss 400kW, short-circuit impedance 12.50%, no-load current 0.4%.
It is the schematic diagram of case ten in Tables 1 and 2 such as Figure 13 and with reference to shown in Tables 1 and 2, discloses sea of the invention
The example IV of wind-powered electricity generation booster system, in the offshore wind farm booster system, wind turbine is a string on every 10 Taiwan Straits, and whole blower fans exist
Offshore boosting station is collected, and directly boosts to 220kV through single transformer after collecting, then transmit to land change through transmission line
Electric institute.
In the embodiment of the present invention four, miniature transformer is not provided with.
It is provided with 1 transformer in offshore boosting station, its voltage class is 220kV, rated capacity 300MVA, nominal transformation ratio
For 220/6.3/6.3, open circuit loss 166kW, load loss 807kW, short-circuit impedance 7-9%, no-load current 0.24%.
Present invention applicant passes through the offshore wind farm pressure build-up technique of analysis conventional, the existing offshore wind farm boosting skill of induction and conclusion
Problem present in art, the base considered from transmission capacity, fed distance, economy, reliability, environment friendly etc.
On plinth, propose by offshore wind farm boost on the spot based on distributed offshore wind farm boost it is theoretical.This boosting mode is direct
On the basis of reducing offshore wind farm systematic economy cost, the electrical energy transportation efficiency and wind energy on the sea of offshore wind farm system are improved
The utilization ratio of resource, realize the combination of offshore wind farm system economy, reliability and environment friendly.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (9)
1. a kind of offshore wind farm booster system, it is characterised in that the system includes：
Marine wind electric field, it includes some sea turn motors；
First transformer, its circuit connect the output end of sea turn motor, and the exit potential of sea turn motor is boosted；
Offshore boosting station, its circuit connect the first transformer output end, and the output to the first transformer boosts to 220V；
Land transformer station, its circuit connect the output end of offshore boosting station.
2. offshore wind farm booster system as claimed in claim 1, it is characterised in that the marine wind electric field includes some Taiwan Straits
Upper wind turbine；Wind turbine is correspondingly connected with first transformer on per the Taiwan Straits.
3. offshore wind farm booster system as claimed in claim 1, it is characterised in that the marine wind electric field includes some Taiwan Straits
Upper wind turbine, wind turbine is divided into some groups of sea separated motor groups on some Taiwan Straits, every group of sea separated motor group connection same the
One transformer.
4. offshore wind farm booster system as claimed in claim 1, it is characterised in that the offshore boosting station and land transformer station
Between connected by submarine cable circuit.
5. offshore wind farm booster system as claimed in claim 1, it is characterised in that the sea turn motor is double-fed blower fan.
6. a kind of offshore wind farm step-up method, it is characterised in that this method includes：
The exit potential of marine wind electric field after the first transformer boost by exporting to offshore boosting station；
Electric energy is boosted to 220V by offshore boosting station, is exported by submarine cable to land transformer station.
7. offshore wind farm step-up method as claimed in claim 7, it is characterised in that the marine wind electric field scale is less than
During 500MW, then directly export；When marine wind electric field scale is more than or equal to 500MW, then by the sea turn motor point of marine wind electric field
Tear open, send out or sent out after direct current collects respectively.
8. offshore wind farm step-up method as claimed in claim 7, it is characterised in that the marine wind electric field offshore distance is less than
Equal to 70 kms, then using ac transmission；Marine wind electric field offshore distance is more than 70 kms, then using flexible DC power transmission.
9. offshore wind farm step-up method as claimed in claim 7, it is characterised in that the marine wind electric field scale is more than
600MW, when offshore distance is more than or equal to 50 km, using flexible DC power transmission.
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| CN110198046A (en) * | 2019-04-28 | 2019-09-03 | 西安交通大学 | A kind of modular multilevel matrix form converter bridge arm Current Decoupling method |
| CN110544580A (en) * | 2018-10-31 | 2019-12-06 | 中国能源建设集团广东省电力设计研究院有限公司 | Main transformer and boosting system of offshore wind power plant boosting station |
| WO2021082586A1 (en) * | 2019-10-30 | 2021-05-06 | 浙江大学 | Offshore wind farm low-frequency alternating-current uncontrolled rectification electric power transmission system |
| CN113206515A (en) * | 2021-04-28 | 2021-08-03 | 中国能源建设集团广东省电力设计研究院有限公司 | 500kV sending-out system of offshore wind farm |
| CN113783222A (en) * | 2020-06-09 | 2021-12-10 | 华龙国际核电技术有限公司 | Power generation method |
| CN114050591A (en) * | 2021-11-09 | 2022-02-15 | 福州大学 | Method for optimizing voltage of offshore wind power plant booster station to realize loss reduction of power transmission project |
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| CN113206515B (en) * | 2021-04-28 | 2023-08-22 | 中国能源建设集团广东省电力设计研究院有限公司 | 500kV sending-out system of offshore wind farm |
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