CN102269116A - Multi-rotor wind power generation system employing direct-current power transmission - Google Patents
Multi-rotor wind power generation system employing direct-current power transmission Download PDFInfo
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- CN102269116A CN102269116A CN2011102410384A CN201110241038A CN102269116A CN 102269116 A CN102269116 A CN 102269116A CN 2011102410384 A CN2011102410384 A CN 2011102410384A CN 201110241038 A CN201110241038 A CN 201110241038A CN 102269116 A CN102269116 A CN 102269116A
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a multi-rotor wind power generation system employing direct-current power transmission, which comprises a lower tower 1, a revolving driving device 3, 2-100 wind turbines, an upper tower 2 and a beam 6, wherein the revolving driving device is arranged between the upper tower and the lower tower; the beam is arranged on the upper tower; the wind turbine is fixedly connected to the top of the upper tower or/and the beam; each wind turbine comprises a wind wheel 5 and a cabin 4; a rectifier is further arranged in each cabin; a power transmission/distribution cabinet 8 is arranged on the upper tower; 2-100 circuit-direct circuit series/parallel-connected devices are arranged in the power transmission/distribution cabinet; and electricity generated by the wind turbines is orderly connected with the rectifiers and the circuit-direct circuit series/parallel-connected devices through leads. The multi-rotor wind power generation system has the following advantages that: the service lives of blades are long; the floor area is small; the mounting and repair cost is effectively reduced; the repair cost is low; the reliability is good; the application range is wide; a revolving bearing or a revolving driving device in the cabin is omitted; and direct-current series/parallel-connected power transmission is employed.
Description
Technical field
The invention belongs to field of wind energy utilization, relate to a kind of many rotors wind-power generating system that adopts direct current transportation.
Background technique
Along with worldwide energy crisis and global environmental pollution aggravation, many countries all pay attention to research, the development and utilization of clean renewable energy sources more.Whole world wind energy timeliness points out, it is more ripe that wind generating technology is compared other renewable energy technologies, and its efficient is also higher, and industrial prospect is best, its development and use growth rate is far above conventional energy resource, and wind generating technology is one of renewable energy technologies with fastest developing speed in the world.
Wind wheel is the core component that wind energy is converted to mechanical energy, so the performance of the performance of blade decision wind-powered electricity generation unit, and the safe and stable operation of blade in phase projected life is most important.The blade of horizontal axis wind-driven generator is subjected to the comprehensive function of horizontal thrust, inertial force and gravity in rotary course.Be subjected to influence by the wind shear, the size of horizontal thrust changes all the time, still is that transmission system and pylon all produce big alternate load to blade; The direction of inertial force changes at any time; Gravity produces an alternate load with the speed same frequency at root of blade.Above-mentioned three alternate loads and consequent vibration are the main causes that blade destroys.
The wind-driven generator single-machine capacity is done bigger and bigger, and relatively more consistent in the world at present view is: single-machine capacity is big more, and cost is low more, and its reason is to it is generally acknowledged that wind energy conversion system power is big more, and required wind energy conversion system number is few more, and the parts that need repairing are few more, and cost is low more.
In fact, owing to be subjected to the rubbing action on building and ground, increase along with height, wind speed increases gradually, this phenomenon is referred to as wind shear, and when blade was in diverse location in plane of rotation, wind speed can be variant, thereby the size of horizontal thrust of bearing at plane of rotation Vertical direction upper blade and flywheel moment can be different, cause blade to be subjected to fatigue load.Simultaneously, gravity also can produce alternate load on blade.Therefore, blade is long more, and weight is heavy more, is subjected to the influence of wind shear and gravitational load big more, and the alternate load that causes blade to bear is big more, and blade is easy more to be destroyed.At present, the report that blades of large-scale wind driven generator destroys is also rare, mainly is that problem does not also expose fully because the installation time is short, after the several years, and perhaps can the large size outburst.In case go wrong; wind energy turbine set causes economic loss owing to shutting down, having a power failure, and counts maintenance, lifting and replacing component, the transportation of transfiniting again in, repeats installation or the like cost, and blower fan is installed in remote or ungetable area mostly in addition; lifting dismounting difficulty is big, and that pays at last is costly.Therefore, reduce though the manufacture cost of wind-powered electricity generation unit increases with power, consider the expenses such as maintenance in later stage, its overall cost can rise on the contrary.On the other hand, its length of blade of large windpower generating unit will reach 60-70m, and land transportation, installation be difficulty very, and the crane capacity that usefulness is installed will be above 1200-1400t, and a lot of areas do not possess this condition, thereby have limited the use of large windpower generating unit.
For the wind-driven generator of a plurality of centralized arrangement, if the electric energy of each wind energy conversion system is all carried by lead separately, not only need a large amount of leads, and because voltage is lower, its conveyance loss is also bigger.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of many rotors wind-power generating system that adopts direct current transportation is provided.
Technological scheme of the present invention is summarized as follows:
A kind of many rotors wind-power generating system that adopts direct current transportation, comprise bottom pylon 1, device for revolving and driving 3 and wind energy conversion system, also comprise top pylon 2, beam 6, device for revolving and driving is arranged between top pylon and the bottom pylon, beam is arranged on the pylon of top, wind energy conversion system is fixedlyed connected with beam with the top of top pylon, wind energy conversion system comprises wind wheel 5 and cabin 4, wind energy conversion system is 2-100, be provided with in the cabin and also have rectifier, the top pylon is provided with power transmission and distribution cabinet 8, is provided with 2-100 road DC circuit series-parallel connection device in the power transmission and distribution cabinet, the electricity that wind energy conversion system sends by lead successively with rectifier, the DC circuit series-parallel connection device connects.
The power of wind energy conversion system is 0.5～500kW, preferably 2～100kW.
Advantage of the present invention and good effect are:
(1) leaf longevity is long.A plurality of medium and small wind energy conversion systems are installed on the pylon of top of the present invention, and its blade is short, is subjected to influence by the wind shear little on short transverse, and the fatigue load of short blade is little, the manufacturing technology maturation of while short blade, and stable performance, thereby the life-span of blade is long.
(2) floor space is little.Consider the influence of wake flow, the common wind-powered electricity generation unit of prior art when mounted will be at intervals, and a plurality of wind energy conversion systems on a pylon of the present invention only need to consider influencing each other of wind energy conversion system side direction, have saved floor space greatly.Simultaneously, the wake effect of medium and small unit can be arranged more the present invention apart from weak point in wind energy turbine set, help improving the total installation of generating capacity of wind energy turbine set, improves the economic benefit of wind energy turbine set.
(3) Du Te mounting type.Top of the present invention pylon is connected with beam, when normal the use, as the mounting structure of wind energy conversion system, beam can be used as and hangs support when installing and keep in repair, do not need or only need small-sized lifting machinery just can carry out equipment and install and dismounting, effectively reduce the installation and maintenance cost.
(4) maintenance cost is low.Be mainly reflected in the following aspects: the one, owing to adopt medium and small wind energy conversion system, its blade is not only short but also in light weight, convenient transportation and replacing are easy; The 2nd, the scale high efficiency is beneficial to integrated and modularization and scale, reduces production costs, and increases economic efficiency; The 3rd, medium and small wind energy conversion system technology maturation, component low price.
(5) good reliability of system.The present invention is the mode of arranging a plurality of wind energy conversion systems on a pylon owing to what adopt, when single or certain several wind energy conversion system break down, can not exert an influence to other wind energy conversion systems, and system still can keep running well substantially.The wind energy conversion system number of wind energy turbine set is more, and single wind energy conversion system breaks down very little to the influence of system and electrical network.
(6) applied range.Compare with the large windpower generating unit with large-scale, the present invention is owing to adopt medium and small wind energy conversion system, no matter be to the requirement of wind field condition, geographical position or floor space will be low many, expanded the application area of native system greatly.
(7) cancelled floating bearing or the gyroscopic drive system in the cabin.Since top pylon and bottom pylon intermediate arrangement gyroscopic drive system, realized the integral body revolution of top pylon, beam and wind energy conversion system, therefore floating bearing or gyroscopic drive system need be set in the cabin of single wind energy conversion system.
(8) direct current series parallel connection transmission of electricity.For the wind-driven generator of a plurality of centralized arrangement, serial or parallel connection power transmission mode after the employing rectification is simplified the frequency modulation phase modulation step, reduces conveyance loss, reduces the cable use amount simultaneously.
Description of drawings
Fig. 1 is a kind of schematic representation that adopts many rotors wind-power generating system of direct current transportation.
Embodiment
Below in conjunction with accompanying drawing enforcement of the present invention is further described, it is descriptive below describing in detail, is not determinate, can not limit the protection domain of patent of the present invention.
A kind of many rotors wind-power generating system that adopts direct current transportation, comprise bottom pylon 1, device for revolving and driving 3 and wind energy conversion system, also comprise top pylon 2, beam 6, device for revolving and driving is arranged between top pylon and the bottom pylon, be used for realizing to top pylon 2, the integral body revolution of beam 6 and wind energy conversion system, beam is arranged on the pylon of top, the top of wind energy conversion system and top pylon or/and beam fixedly connected, wind energy conversion system comprises wind wheel 5 and cabin 4, wind energy conversion system is 2-100, also be provided with rectifier in the cabin, the top pylon is provided with power transmission and distribution cabinet 8, be provided with 2-100 road DC circuit series-parallel connection device in the power transmission and distribution cabinet, the electricity that wind energy conversion system sends by lead successively with rectifier, the DC circuit series-parallel connection device connects.
The power of wind energy conversion system is 0.5～500kW, preferably 2～100kW.
The working principle of patent of the present invention is:
When wind speed reaches the startup wind speed of wind energy conversion system, wind energy conversion system begins rotation work, the electric energy that produces from 2-100 wind energy conversion system changes direct current into by the AC-DC device, the multi-channel DC electricity is linked on the 2-100 road DC circuit series-parallel connection device that is arranged in the power transmission and distribution cabinet jointly, power outward according to the direct current that certain compound mode is carried out behind the serial or parallel connection, be used to generate electricity by way of merging two or more grid systems or be transported to energy-storage system and carry out energy storage.
Claims (3)
1. many rotors wind-power generating system that adopts direct current transportation, comprise bottom pylon (1), device for revolving and driving (3) and wind energy conversion system, it is characterized in that also comprising top pylon (2) and beam (6), described device for revolving and driving is arranged between described top pylon and the described bottom pylon, described beam is arranged on the pylon of top, the top of described wind energy conversion system and described top pylon or/and described beam fixedly connected, described wind energy conversion system comprises wind wheel (5) and cabin (4), described wind energy conversion system is 2-100, also be provided with rectifier in the described cabin, described top pylon is provided with power transmission and distribution cabinet (8), be provided with 2-100 road DC circuit series-parallel connection device in the described power transmission and distribution cabinet, the electricity that wind energy conversion system sends by lead successively with described rectifier, the DC circuit series-parallel connection device connects.
2. a kind of many rotors wind-power generating system that adopts direct current transportation according to claim 1, the power that it is characterized in that described wind energy conversion system is 0.5～500kW.
3. a kind of many rotors wind-power generating system that adopts direct current transportation according to claim 2, the power that it is characterized in that described wind energy conversion system is 2～100kW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102410384A CN102269116A (en) | 2011-08-19 | 2011-08-19 | Multi-rotor wind power generation system employing direct-current power transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102410384A CN102269116A (en) | 2011-08-19 | 2011-08-19 | Multi-rotor wind power generation system employing direct-current power transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108368821A (en) * | 2015-12-22 | 2018-08-03 | 维斯塔斯风力系统有限公司 | Wind power station and multi-rotor wind turbine system |
| CN111516800A (en) * | 2020-04-30 | 2020-08-11 | 刘长礼 | Ocean power generation deep sea escape ship and method for simultaneously generating power by blocking sea waves |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352819A (en) * | 1999-05-28 | 2002-06-05 | Abb股份有限公司 | A wind power plant |
| CN201250765Y (en) * | 2008-08-06 | 2009-06-03 | 青岛安华新能源开发有限公司 | Assembly type wind generating set |
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2011
- 2011-08-19 CN CN2011102410384A patent/CN102269116A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352819A (en) * | 1999-05-28 | 2002-06-05 | Abb股份有限公司 | A wind power plant |
| CN201250765Y (en) * | 2008-08-06 | 2009-06-03 | 青岛安华新能源开发有限公司 | Assembly type wind generating set |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108368821A (en) * | 2015-12-22 | 2018-08-03 | 维斯塔斯风力系统有限公司 | Wind power station and multi-rotor wind turbine system |
| CN108368821B (en) * | 2015-12-22 | 2020-05-26 | 维斯塔斯风力系统有限公司 | Wind power plant and multi-rotor wind turbine system |
| US10697436B2 (en) | 2015-12-22 | 2020-06-30 | Vestas Wind Systems A/S | Wind power plants and multi-rotor wind turbine systems |
| CN111516800A (en) * | 2020-04-30 | 2020-08-11 | 刘长礼 | Ocean power generation deep sea escape ship and method for simultaneously generating power by blocking sea waves |
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Application publication date: 20111207 |