CN102748236A - Novel fluid transmission wind driven generator for guaranteeing stability of grid connection - Google Patents
Novel fluid transmission wind driven generator for guaranteeing stability of grid connection Download PDFInfo
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Abstract
The conventional large-sized wind driven generator is provided with extremely huge blades, the high-wind-speed wind load is extremely high, and a control system has lagging property, so that large-amplitude fluctuation of output power is certainly caused; and thus, the stability of the grid connection is poor. The invention discloses a novel fluid transmission wind driven generator, wherein liquid or gas is adopted for transmission; a power generation device is placed on the ground; the head of a fan is only provided with blades, a main shaft and a fluid pump; and a downwind structure is adopted, and the adopted blades are flexible intelligent feather-shaped blades, have light weight and are low in manufacturing cost, so that output of high rotation speed and large torque can be realized, and the output efficiency of the fluid pump is greatly increased. After high-pressure fluid output by the head of the fan reaches the ground, a gravity energy storage device is firstly connected, and the pressure of fluid output by the energy storage device is constant, so that the stability of rotation speed of a hydraulic motor (or pneumatic motor) and a generator can be guaranteed, and the stability of the grid connection can be guaranteed; and for a large-sized wind power farm, because of the existence of the energy storage device, gradual grid connection can be realized by stages and in groups, and a contribution is made to the problem of grid connection of the land and the three gorges of China.
Description
Affiliated technical field:
The present invention relates to a kind of of wind-power electricity generation can guarantee the novel fluid transmission wind power generation machine that is incorporated into the power networks stable.Wind energy is the huge new energy of reserves, and along with the increase of wind energy development scale, the problem that is incorporated into the power networks is more and more outstanding.We know that wind has wave properties, and crest is arranged, and trough is also arranged, and blanking time, change of wind velocity must cause the variation of wind-powered electricity generation acc power than the long fitful wind that is called.Existing large-scale wind generating technology all is to introduce from Europe, and blade is very huge, carries very greatly in the higher wind velocity condition leeward, and control system has hysteresis quality, and the wind that can not regulate and control blade timely and effectively carries, and must cause the fluctuation of wind-powered electricity generation machine output power.Along with China greatly develops going deep into of wind-powered electricity generation construction, the wind energy turbine set scale is increasing, and the wind-powered electricity generation base scale of China's planning construction is all more than ten million kilowatt, and the inrush current of so large-scale wind energy turbine set moment generation just is enough to let electrical network paralysed.Therefore, we must development of new wind-powered electricity generation machine, and utilizes the impact energy of energy storage device buffering wind energy, utilizes energy storage device to guarantee the stable output of wind-powered electricity generation acc power, guarantees the stability that is incorporated into the power networks.The present invention adopts flexible transmission exactly, utilizes liquid or gas to carry out transmission exactly, and energy storage device is set, and buffering and stored energy guarantee the stable output of energy simultaneously, guarantees the generator steady running, guarantees the stability that is incorporated into the power networks.
Background technique:
Wind energy is to have the new energy that exploitation is worth most, wind energy be distribute the widest, nearest from us, take the free of contamination clean energy resource of most convenient, make good use of wind-powered electricity generation to reducing carbon emission, it is great to improve Significance for Environment.Wind energy also is the huge new energy of reserves, and wind energy is inexhaustible, and has minimum relatively development cost, so the development of wind-powered electricity generation should be as the emphasis of new energy development.
Large-scale wind electricity equipment is difficult to storage because generated energy is big, so must networking.The wind-powered electricity generation research direction and the target in the whole world almost have only one over nearly 30 years, are exactly how to solve this global problem that is incorporated into the power networks.Electrical network has extremely strict technical order to the wind-powered electricity generation that networks, and the wind-powered electricity generation of networking must be able to satisfy frequency stabilization, voltage stabilizing and the surely requirement mutually of electrical network.Natural wind is unsettled, so the electricity that the wind-powered electricity generation machine is sent also is unsettled.Unsettled wind-powered electricity generation will produce enormous impact to electrical network; Cause mains breakdown or device damage; In order to satisfy the harsh conditions that are incorporated into the power networks; The artificer has to the structure of wind-powered electricity generation machine is infinitely complicated, learns characteristic and the optimal wind energy interval is a cost with the best power source of sacrificing the wind-powered electricity generation machine, causes that wind power cost is doubled, power coefficient descends more than 30%.The intermittence of wind energy, the uncertainty of wind speed and direction finally causes the unstability of wind-powered electricity generation machine, the online qualification that is still " not welcome by electrical network " that finally brings.
Be the interconnection technology that adopts constant-speed and constant-frequency at first, in order to realize the stable of wind-powered electricity generation machine rotating speed, at first the paddle with reference to helicopter designs blade; Utilize the stalling characteristics of blade to keep the stable of rotating speed; When wind speed reached certain value, unique wing-shaped structure made blade be in stall conditions to utilize blade, and the lift of blade reduces; Resistance increases, volitional check the increase of power.Behind the blade stall, change of wind velocity is little to the output influence of power, because stall rear blade lift variation is little, has so just guaranteed stablizing of wind-powered electricity generation acc power and stablizing of rotating speed.This mode is called for fixed starches apart from the stall-adjusted technology, and fixed slurry is rigidly connected apart from blade that is meant wind wheel and wheel hub employing, and the slurry elongation of blade is constant.Along with the wind-powered electricity generation machine develops to MW class, stalled blade can not meet the demands, and has occurred feather angle control technique again.、
Feather angle control technique is controlled blade exactly along longitudinal axis rotation blade; Blade and control system are to design with reference to the paddle of helicopter and wing angle control; Mainly be exactly the Modulatory character of utilizing paddle, the angle of attack that facings the wind of control blade, the rotating speed of control impeller; Keep the stable of power output, guarantee the constant-speed and constant-frequency of generator.Feather angle control technique is to integrate the high-tech technology, and principle is very advanced, and existing electronic remote control has the equipment self controller again; Existing two 3-D data set process controls have fuzzy intelligence control again; Existing efficient machine layout has superpower material again.But in use; Find that this control mode still can not guarantee the reliability that is incorporated into the power networks; Because weather conditions are very complicated, and severse weathers such as blast, heavy rain, sandstorm are arranged, the speed of wind and direction also are at random in continuous variation; There is hysteresis quality all the time in control system, will guarantee the constant very difficulty of wheel speed in this case.Can not guarantee the constant of rotating speed, will cause the automatic off-grid of wind-powered electricity generation machine, also just can not guarantee the stability that is incorporated into the power networks, final certification utilization control wheel speed realizes that the purpose that is incorporated into the power networks fails.Occurred the variable speed networking technology subsequently, wind power technology has been walked one section detour, has got back to starting point again.
Variable speed constant frequency networking electronic control technology is the new technology that develop rapidly is in recent years got up, and the variable speed technology can let wind wheel with the speed of the corresponding change rotating speed of change of wind velocity, keeps substantially invariable optimum speed ratio, can obtain the energy of fitful wind so efficiently.Because the rotating speed of impeller can change along with wind speed, just avoided of the influence of wheel speed uncontrollability to the stability that is incorporated into the power networks, the stability that is incorporated into the power networks with the constant-speed and constant-frequency compared with techniques can significantly improve.But because the hysteresis quality that the high wind of blade carries with control system still exists, under the strong wind state, the sudden change of wind speed and direction makes the wind-powered electricity generation machine produce inrush current easily, still can influence the stability that is incorporated into the power networks.
Main flow wind-powered electricity generation unit all adopts horizontal shaft type type three blade structures against the wind at present.Driftage technology, change slurry are the core technologies of present high-power generator group apart from technology and big blade manufacturing technology.The driftage technology is exactly to utilize wind direction testing apparatus, electric control device and mechanical transmission, and control wind-driven generator along continuous straight runs rotates, and makes wind wheel all the time towards the direction of the wind comes from, to obtain maximum wind energy.Becoming slurry is exactly to utilize wind-force speed measurement device, electric control device and mechanical transmission control paddle along longitudinal axis rotation blade apart from technology; The power absorption of control wind wheel; Keep certain energy output, becoming slurry is that the unit starting performance is good apart from the advantage of regulating, and output power is stable; Set structure is stressed little, shuts down convenient and safe.The blade of existing high-power wind-driven generator is all very huge, and existing 3MW generator set blade reaches 60 meters, is to design according to aerodynamic principle; With reference to the narrow long strip blade that the paddle of helicopter manufactures and designs, strong rigidity can require very high, and manufacture cost is very big; The shape of blade as the wing of aircraft, is not that wind promotes wind wheel blade according to the aerodynamic principle manufacturing; But it is different to cross the leave dual sides flow velocity by wind, and the draught head of generation forms lift, promotes blade rotation.
Existing wind-driven generator is divided into double-feedback aerogenerator and direct-drive aerogenerator again according to the difference of electric generator structure.Double-feedback aerogenerator through the gear-box speed-raising, drives the double-fed generator generating by impeller, and this structure generator cost is low, and net mode is simple, but gear-box breaks down easily.Direct-drive aerogenerator does not have the gear-box speed-raising; In order to improve generated energy, must significantly increase number of electrodes, the volume and weight of generator all significantly increases; Copper consumption also significantly increases, so direct-drive aerogenerator weight and cost are also bigger than double-feedback aerogenerator.From the present market share, straight wind dispelling machine is near 30%, and the double-fed type blower fan accounts for about 70%.Though this blower fan of two types is also imperfect, existing problems are many, and these two kinds of types that type is a large-scale industrialized production are the ripe relatively products of technology.But,, the large-scale wind power machine is still global problem so far so being incorporated into the power networks because the output of the power of wind-powered electricity generation machine produces big ups and downs with the variation of wind-force easily.
China's windy area is all more remote; Be inverted with the electricity consumption center; National conditions require China must greatly develop the wind-powered electricity generation industry again, so the principles and policies of " build big base, incorporate big electrical network " are put into effect; The big construction of base of wind-powered electricity generation is arisen at the historic moment, but we will face large-scale wind power machine this world-famous puzzle that is incorporated into the power networks.
European countries' electrical network is all networked, and has wind-powered electricity generation, water power, thermoelectricity, nuclear power to also have pneumoelectric in the electrical network, and intelligent grid can coordinate each other, replenish each other, balance each other, is very powerful intelligent grid.But because the not assurance of stability of being incorporated into the power networks of wind-powered electricity generation machine disperses to network the mode of dissolving nearby so still adopt.General wind energy turbine set scale is all less, and such as in Germany, most wind energy turbine set electric motor powers are less than 50,000 kilowatts.When wind speed and direction altered a great deal, the wind-powered electricity generation machine was unstable, can not satisfy the condition of being incorporated into the power networks, wind-powered electricity generation machine this moment off-grid at any time; After the wind-powered electricity generation machine is stable, can network at any time again, can not cause too big impact electrical network.
The 973 plan wind energy project chief scientists of country turn round and look at and defend east detailed argumentation is arranged: " it is a global problem that the large-scale wind power machine is incorporated into the power networks; be by the self-characteristic decision of wind energy; the characteristic of wind energy causes the wave properties of wind-powered electricity generation, intermittence and irreqularity, makes the wind-powered electricity generation can not be greater than 10% to the proportion of electrical network.To not influence of electrical network, proportion about 5% can reduce influence through the proper technique measure to proportion about 3%, and 10% will bring hidden danger to operation of power networks when above.Grid connected wind power ratio doubtful point for 10% is more, and is equivalent to 25% of this state's electricity consumption total amount with wind-powered electricity generation that Denmark is sent out this problem is described.In fact Denmark is a micro state, and its wind-powered electricity generation has been shared by other countries' electrical network.Norway in next door particularly, water power is very abundant, accounts for 75% of national generated energy, and the wind-powered electricity generation of Denmark has been brought into play good peak regulation effect.According to renewable energy sources research center, Northern Europe data, the maximum marine wind electric field of Denmark is 160,000 kilowatts, and Fen Sanlu send the electricity disembarkation, and wherein two-way is to be sent to Norway.So up to the present, with regard to the electrical network of whole Denmark, the wind-powered electricity generation ratio does not reach 10% yet.”
So; Though European countries' wind-powered electricity generation accounting is very big; Still all be to adopt to be dispensed into net mode, and the blower fan quantity and the capacity of access point of having worked out wind-electricity integration guide rule strict regulations, and the regulation standard that inserts and withdraw from; Denmark State Grid Corporation of China can receive four weather forecasts from three different WF companies every day; Utilize advanced software systems to predict when the described wind-force variation of weather forecast can have influence on blower fan then, and analyze these variations, carry out manual intervention fast the influence that whole electric power system brings.But the situation that actual wind speed and prediction wind speed fit like a glove seldom.This passive, inaccurate control mode is inapplicable to China certainly, and the inrush current that wind energy turbine set moment of Chinese large-sized produces just is enough to let the electrical network paralysis, can not carry out manual intervention if having time.Also do not have successful experience to use for reference abroad so be incorporated into the power networks on a large scale, also do not have ready-made technology to buy, we also can not build up the intelligent grid also more powerful than Europe, have built up exactly and can not solve the problem of being incorporated into the power networks.
6 the ten million kilowatt of wind-powered electricity generation bases that have that China is building in area, " three Norths " (northwest, northeast, North China); But these places are again the most weak areas of electrical network; The construction of wind energy turbine set is scarcely out of swaddling-clothes, and builds up the difficult situation that project has been in has electricity can not send, and has 1/3 wind-powered electricity generation machine to be in the idle state that can't be incorporated into the power networks; Cause the loss of investment, also cause a large amount of losses of wind-powered electricity generation.This problem mainly is that the unstability of wind energy causes, and we calculate this problem of explaining through simple quantification, and one ten million multikilowatt wind energy turbine set has the wind-powered electricity generation unit about 5000, and wind energy turbine set will be prolonged continuous several hundred kilometers.We calculate the size that wind energy turbine set produces inrush current according to the surge principle, and the surge principle is exactly the energy that row's wave produces, and can not offset because of the existence of trough; The transmission that can go ahead, the arrangement that we set wind energy turbine set apoplexy motor are uniformly, are set under the effect of fitful wind; Have 100 typhoon motors to receive the influence that wind speed changes, we choose 2.5MW wind-powered electricity generation machine data and calculate, and the plate of wind-powered electricity generation machine is the German Nordex N80 of company; We get lower data, and as wind speed 5m/s, power is 120kw; As wind speed 6m/s, power is 248kw.When wind speed was changed to 1m/s, the variation of power was 128kw, if calculate by 100 typhoon motors; Power change values just reaches 12800kw; This impact energy of ten thousand kilowatts can continue a period of time in circuit, the length of time is exactly the time that this fitful wind shifts out wind energy turbine set, during this period of time also has second fitful wind; The 3rd fitful wind ... The n fitful wind forms inrush current, total the inrush current in the circuit is exactly a n inrush current sum.Do not how many impact energys of ten thousand kilowatts know to want how powerful intelligent grid just can bear? And this calculated value is very little; We are by low wind speed; Little variable quantity calculates; Actual wind speed changes much bigger, and the variation of wind direction is also bigger than wind speed to the influence of wind-powered electricity generation acc power.So the impact energy in actual the use is big more a lot of than this value, will be very surprising, we must take seriously.Therefore solving the problem that is incorporated into the power networks, is not that to build up an intelligent grid so simple.
So the difficult problem that is incorporated into the power networks of wind energy turbine set is that the wind energy unstable characteristic causes, also be that wind-powered electricity generation machine output power instability causes, we can't change the characteristic of wind energy, and we will solve the difficult problem that is incorporated into the power networks must adopt brand-new wind power technology.Hydraulic transmission technology is a kind of energy-delivering technology of flexibility, and can very simply realize the storage of energy.We can be applied in hydraulic transmission technology on the wind-powered electricity generation machine, and hydraulic transmission can cushion the impact energy of wind energy, also can convert wind energy to hydraulic energy store, and slowly stable discharging drives generator and steadily generate electricity, and guarantees the stability that is incorporated into the power networks.
The hydraulic transmission wind-driven generator does not also have enterprise to do at home.Worldwide, also have only Norway a company and U.S. a company to make the model machine of hydraulic transmission wind-driven generator, but all be test, do not have the commercialization type.Why is not hydraulic transmission wind-powered electricity generation machine at home and abroad all trial-produceed successfully? We can from following some analyze:
1, at first there is not big innovation from structure.The hydraulic transmission wind-powered electricity generation machine of exploitation just simply combines existing wind-powered electricity generation machine technology with hydraulics, and blade still is existing " three pins " formula blade, and control system does not change yet, and has just changed existing gearbox into oil hydraulic pump and oil hydraulic motor.From the requirement of hydraulic transmission characteristic, at first hydraulicdriven efficient is lower than mechanical transmission, and how significantly improving hydraulicdriven efficient is wind-powered electricity generation machine key of success! Improve hydraulicefficiency, must improve the delivery efficiency of oil hydraulic pump, require blade to drive oil hydraulic pump high pulling torque, high-revolving motion, could improve hydraulicdriven efficient like this.But existing pin type rigid blade is very huge, and weight is big, is not suitable for high speed operation, has during high speed operation not that balance all can cause serious consequence, also makes the wind-powered electricity generation machine out of control easily.So existing blade operation slowly, per minute tens changes, and does not meet hydraulicdriven efficient and requires, and Blade Properties must corresponding change.
2, power generation performance is low, will lose exploitation and be worth.We analyze the runnability of existing wind-powered electricity generation machine first, and the incision wind speed of existing wind-powered electricity generation machine is 4 meter per seconds, and the starting torque of wind-powered electricity generation machine is very big; When the wind-powered electricity generation machine starts; The wind-powered electricity generation machine uses the electricity of electrical network, and generator becomes motor and drags blade rotation, after the wind-powered electricity generation machine starts; When wind speed reached incision wind speed 4 meter per seconds, the motor incision converted generator to and generates electricity.In actual use; Three usual moderate breezes should be generated electricity; But because wind is to have intermittently, can cut in and out, the wind-powered electricity generation machine also just is in the continuous transfer process of generator and electric motor state; The state of generating and power consumption exists simultaneously, so generating efficiency is very low under low wind speed state.We analyze hydraulic transmission wind-powered electricity generation machine again; Hydraulic transmission wind-powered electricity generation machine is hydraulic pressure installation fully, does not have motor to help blade rotation, and the weight of wind wheel reaches tens tons; The starting torque that also has oil hydraulic pump; These factors are certain to increase the startup wind speed of blade, start wind speed and are certain to possibly reach 5 meters～6 meter per seconds greater than existing wind-powered electricity generation machine with the incision wind speed.Existing wind-powered electricity generation machine power generation performance is very low; Wind speed is higher if hydraulic transmission wind-powered electricity generation machine starts, and hydraulicdriven efficient is lower than mechanical transmission, and the power generation performance of hydraulic transmission wind-powered electricity generation machine will be lower; Cost does not have too big advantage yet, is worth so hydraulic transmission wind-powered electricity generation machine will lose exploitation.
3, another is exactly the conversion efficiency problem of oil hydraulic pump and oil hydraulic motor.The rotating speed that existing large-scale blade wind wheel drives oil hydraulic pump has only per minute tens commentaries on classics; The rotating speed of generator is generally more than 1,000 commentaries on classics; Differ nearly a hundred times, oil hydraulic pump and oil hydraulic motor are under the situation of uniform pressure, same traffic, and rotating speed will improve hundred times; Be difficult to reach the output of same power, the rotating speed of general oil hydraulic motor is low.
4, be not incorporated into the power networks problem as emphasis solving the large-scale wind power machine.Stability guarantees that not all adopt and be dispensed into net mode, the wind energy turbine set scale is less than 50,000 kilowatts, so a difficult problem that does not exist the large-scale wind power machine to be incorporated into the power networks also just can not be studied the problem of this respect abroad because existing wind-powered electricity generation machine is incorporated into the power networks.But China's construction all is ten million multikilowatt wind energy turbine set, faces the severe difficult problem that is incorporated into the power networks, and we must utilize the performance characteristics of hydraulic transmission wind-powered electricity generation machine to solve the difficult problem that the large-scale wind power machine is incorporated into the power networks.Existing hydraulic transmission wind-powered electricity generation machine and net mode more direct, utilize oil hydraulic motor can realize the characteristics of speedup, speed governing and stabilized (steady-state) speed, directly control the running of generator, guarantee the stability that is incorporated into the power networks.But any control system all has hysteresis quality; Can not guarantee not have out-of-control phenomenon to produce? Hydraulic transmission can cushion the wave properties of wind energy; But the intermittence of wind still can produce the wave properties of power; This wave properties can form a large amount of inrush currents for the large-scale wind power machine is incorporated into the power networks, and the safety of electrical network is threatened.So the advantage that existing hydraulic transmission wind-powered electricity generation machine solution large-scale wind power machine is incorporated into the power networks is not also brought into play.
In a word, hydraulic transmission wind-powered electricity generation machine exploitation in the past just simply combines existing wind-powered electricity generation machine technology with hydraulics, and hydraulicefficiency is low, and power generation performance is low, and cost does not have competitive advantage yet.So existing hydraulic transmission wind-powered electricity generation machine has just lost exploitation and has been worth.We will let the exploitation of hydraulic transmission wind-powered electricity generation machine achieve success, and just must innovate technology comprehensively, particularly will be incorporated into the power networks problem as emphasis solving the large-scale wind power machine, let the century-old difficult problem that is incorporated into the power networks of puzzlement be solved through hydraulic transmission wind-powered electricity generation machine! The solution of this problem is significant, is related to the success or failure that China " wind-powered electricity generation Three Gorges " builds!
Summary of the invention:
At first we can carry out major tuneup to wind-powered electricity generation machine structure according to hydraulicdriven characteristics; Hydraulic Power Transmission System can realize the remote transmission of energy; We can be placed on ground with electricity generating device fully, and the blower fan head has only impeller, main shaft and oil hydraulic pump to constitute, and structure is significantly simplified; Weight significantly reduces, and can reduce the cost of maintenance cost and pylon.Hydraulicdriven another characteristics are not afraid of overload exactly; If overload, the hydraulic oil that just pumps is more, and oil pressure can raise; Just can prevent overload through reduction valve; Need not carry out the control of output power,, only need to install the brake arresting gear and just can meet the demands so control system can be installed.What therefore the function of blower fan head just became is more single, guarantees that exactly the continual output of hydraulic oil is just passable.
Analyze from structure, because all electricity generating devices and control system be all on ground, at first pipeline is long, hinders in order to reduce oil, and caliber can't be too thin; Overground installation also has storage to press energy storage device, and therefore the oil reserve of whole device is very big.The flow of MW level oil hydraulic motor also is surprising on the other hand.Therefore the output that guarantees oil hydraulic pump high pressure, big flow is this technological key of success!
MW level wind-powered electricity generation machine blade is very huge now; Per minute has only tens commentaries on classics; Be difficult to satisfy oil hydraulic pump high pulling torque, high-revolving requirement, therefore will solve this difficult problem must adopt new blade, and my up-to-date patented technology " flexible intelligent blade " can solve this difficult problem fully!
" flexible intelligent blade " is to extract the intelligent blade of developing according to the structural characteristics of feather.The feather structure is very slim and graceful, but the extraordinary wind function of catching is arranged, and can unload flexibly, excellent performance, I extract according to the structural characteristics of feather, successful development " flexible intelligent plumage shape blade ".The profile of the big or small corresponding change wind-engaging that " flexible intelligent plumage shape blade " can carry according to wind can realize that low wind speed is fully loaded, and therefore the high wind speed unloading can save and become slurry apart from device.Through small-sized prototype experiment, " flexible intelligent plumage shape blade " catches that the wind effect is very good, and force one wind just can start, and three moderate breezes just can fine generating, and fresh breeze reaches at full capacity, and output torque is big, and rotating speed is high.
" flexible intelligent blade " can overcome the shortcoming of rigid blade fully; And can increase blowing area; Because " flexible intelligent blade " can when increasing wind energy amount of obtaining and inversion quantity, improve the stress of blade according to the profile of the corresponding change wind-engaging of change of wind velocity; Dissolve the collapsing force of wind, help the running of wind-powered electricity generation machine safety and stability.Under low wind conditions, deformable blade is little, obtains strong wind and carries with facing the wind angle and maximum wind-exposuring area of the best; Under middle wind conditions, along with wind speed increases, deformable blade can progressively increase, and progressively reduces facing the wind angle and wind-exposuring area, keeps institute's wind-engaging to carry the relatively stable of size, guarantees the steady output of generated output; Under higher wind velocity condition, blade significantly is out of shape with wind speed, and wind-exposuring area significantly reduces, and wind carries and reduces, and suffered windage significantly increases, and the rotating speed of blade can not speed, on the contrary can be slack-off, can not cause wind-powered electricity generation machine overload, and need not shut down yet, still can keep normal power generation.So " flexible intelligent blade " this intelligentized adjustment process more meets the requirement that wind-powered electricity generation machine wind carries characteristic.
" flexible intelligent plumage shape blade " structure is very slim and graceful, and cost is more much lower than existing blade, and it is also as safe as a house to run up.The new blade wind wheel can adopt six blade structures, and cost is still low more than 30% than existing wind wheel, and the blowing area of new blade wind wheel can improve more than 3 times, can realize the output of wind wheel high pulling torque.Wind wheel drives oil hydraulic pump high pulling torque, high rotation speed operation, with the delivery efficiency that significantly improves oil hydraulic pump, can solve the low difficult problem of hydraulicefficiency fully, for the industrialization of hydraulic transmission wind-powered electricity generation machine is paved the way.
" flexible intelligent plumage shape blade " amount of deformation is big; Existing wind-powered electricity generation machine structure can't meet the demands; Must structurally innovate, must adopt my patented technology " postpositional blade type wind power generating device efficiently " number of patent application (201010161689.8).Wind-driven generator adopts type postpositional blade structure with the wind; " flexible intelligent blade " is installed in the rear of support, recedes into a cone angle, after receiving wind; Impeller is under the effect of support shaft pulling force; The conical surface is all the time towards the direction of the wind comes from, and so just realized that the wind-powered electricity generation machine adjusts the requirement of windward side automatically, thereby obtained maximal wind-energy.This structure has saved yaw device, does not have mechanical failure, also can not regulate and control malfunctioningly, apply additional moment also can not for the wind-powered electricity generation machine, and regulating can be free, more accurate more.
After adopting this patented technology; Can save yaw device, become slurry apart from device, speed change gear and control system; What therefore the head construction of wind-powered electricity generation machine will become is very simple; Every hydraulic transmission blower fan head is made up of blade, oil hydraulic pump and pylon, only needs to convert wind energy into the hydraulic pressure ability, is transported to ground electricity generating device through pipeline.Because structure is significantly simplified, just existing below 30% of wind-powered electricity generation machine cost of every typhoon motor cost.
Generator drives by oil hydraulic motor, and stable the stable of generator speed that be directly connected to of oil hydraulic motor rotating speed though oil hydraulic motor can have the function of speed governing, can't guarantee the stable of output power.Because wind energy has wave properties; Blanking time is long is called fitful wind; The wave properties of wind energy must cause the wave properties of oil hydraulic pump output power, and this wave properties will have influence on the stabilization of speed of oil hydraulic motor, causes the wave properties of generator power output; Will have a strong impact on the stability that is incorporated into the power networks, guarantee that therefore the stable of oil hydraulic motor rotating speed should be as emphasis.Guarantee the constant of oil hydraulic motor rotating speed, will guarantee the stable of hydraulic pressure, we can set up storage to press bag, but storage presses the pressure of bag can not keep constant.If influx is greater than discharge, pressure will raise; If discharge is greater than influx, pressure can reduce again.Therefore we must be provided with the constant voltage energy storage device; The flexible energy storage device of energy storage device, inertia energy storage device, gravity energy storage device; Elastic energy and inertia energy all are linear change; And gravity all is constant in any position, so we can select gravity to come stored energy, designs a gravity energy storage device.
Gravity energy storage device mainly contains oil hydraulic cylinder, plunger, connection oil pipe and configuration weight and constitutes; The effect of gravity energy storage device is exactly the high pressure oil jack-up weight that utilizes blower fan output, stores gravitational potential energy, and size all is identical and gravity is in any position; Gravity is exactly a definite value to the pressure of hydraulic oil; The pressure that so just can guarantee the hydraulic oil of energy storage device output is steadily fixing, pressure steadily will drive the stable running of oil hydraulic motor, oil hydraulic motor drives generator for electricity generation; The electricity that sends also is stable, and what so just guaranteed to be incorporated into the power networks is stable.
Gravity energy storage device is simple in structure, and cost is low, can be every as required several gravity energy storage devices of typhoon motor configuration, and gravity energy storage device will be made huge contribution aspect the difficult problem that the large-scale wind power machine is incorporated into the power networks solving.Here general plan that is incorporated into the power networks of my earlier simple imagination is explained and is solved large-scale wind power machine the be incorporated into the power networks principle and the meaning of a difficult problem, same still above the data of wind energy turbine set, we formulate the strategy that is incorporated into the power networks of 5000 typhoon motors first; Because every typhoon motor all has gravity energy storage device; The working time that every energy storage device can be kept, we were assumed to 30 minutes, owing to have energy storage device, we can carry out being incorporated into the power networks of 5000 typhoon motors by stages and in groups; Be incorporated into the power networks 50 such as per minute; Other wind-powered electricity generation machine is in the energy storage state, just can let the completion of 5000 typhoon motors be incorporated into the power networks, and electrical network is not had any shock effect in 100 minutes.We analyze the novel wind power machine again and continue the premium properties of output to guaranteeing wind-powered electricity generation, see that from the characteristics of " three Norths " regional wind energy generally night, wind was bigger, can reach more than five or six grades moderate breeze on daytimes three; The just fine generating of ability of novel wind power machine three moderate breezes; Fresh breeze reaches at full capacity; We set, and to reach the fully loaded time night be 8 hours, and daytime, the generated energy of every unit was fully loaded 1/5 (being equivalent to 1000 full loads), and generating dutation is 16 hours; 5000 typhoon motor energy storage 30 minutes are exactly 2500 hours, and we equaled 156 divided by 16 hours again.Therefore daytime, we generated electricity at full capacity at the 1156 typhoon motors that are equivalent to per hour be incorporated into the power networks; Most important meaning is that energy storage device has guaranteed the long-time stable output of wind-powered electricity generation; Also for the use of other peaking power source has guaranteed the sufficient reaction time, this is very great to the intermittent meaning that solves wind-powered electricity generation.Now owing to consider that the variation of wind-powered electricity generation is very fast; And the startup of thermoelectricity needs the long period; So adopting the ratio of thermoelectricity peak regulation is 1: 2, a wind-powered electricity generation is regulated with regard to two parts of thermoelectricitys of needs, and the investment of building thermal power plant will be very huge; It also is that irrational, big like this investment also can't realize that regulating action is just played in big investment like this! The application of novel hydraulic transmission wind-powered electricity generation machine can significantly reduce the configuration of peaking power source, will guarantee carrying out smoothly of China " wind-powered electricity generation Three Gorges " construction.We analyze the influence of fitful wind to the wind-powered electricity generation machine again; There are 100 typhoon motors to receive the influence of fitful wind equally; The power that every typhoon motor increases is 128KW, and the energy of this increase is to be stored in the hydraulic accumulation energy device, can be to any influence of stable generation of generator.If there is the n fitful wind that the wind-powered electricity generation machine is exerted an influence, the hydraulic accumulation energy device reaches capacity, and we can carry out release through pressure-limit valve, can not produce overload to the wind-powered electricity generation machine, also can not influence the steady generating of generator.So hydraulic transmission wind-powered electricity generation machine is the unique type that solves " wind-powered electricity generation Three Gorges " difficult problem that is incorporated into the power networks!
At present, that wind-powered electricity generation mechanism causes is high, maintenance cost is high also is the biggest obstacle of restriction wind-powered electricity generation industry development, and novel hydraulic transmission wind-powered electricity generation machine will make a breakthrough aspect the wind-powered electricity generation machine cost significantly reducing.Existing wind-powered electricity generation machine is very noble, all electronic control, and control system is very complicated, and mechanical part all is large-scale accessory, Materials with High Strength, special process.To control system, all can not lack apart from device, gearbox, generator by each part from yaw device, change slurry for every typhoon motor, complex structure, and cost is high, and rate of fault is very high, and maintenance cost is big! Very difficulty wants to reduce cost!
Hydraulic Power Transmission System can realize the remote transmission of energy, and we can improve the efficient of operation with many typhoons group of motors combined running fully, reduce the cost of operation.For example can be together with six typhoon motor combination, every typhoon motor only needs to convert wind energy into the hydraulic pressure ability, is connected to total storage through pipeline and presses bag and gravity energy storage device, and energy storage device connects oil hydraulic motor and drives generator for electricity generation.Because every just existing below 30% of wind-powered electricity generation machine cost of novel fan cost, if every 1.5MW, 6 is exactly 9MW, and 6 hydraulic pressure wind-powered electricity generation machines add that the cost of oil hydraulic motor and generator also just is equivalent to the existing wind-powered electricity generation machine cost of 3MW.And generated energy could reach 9MW, and just the cost of wind-powered electricity generation machine has reduced by 3 times, so significantly reduces cost, and the cost of electricity-generating of wind-powered electricity generation can be lower than thermoelectricity fully certainly, and this novel hydraulic transmission wind-powered electricity generation machine will drive the wind-powered electricity generation industry and carry out an explosion type development! The competitive advantage of this novel hydraulic transmission wind-powered electricity generation machine is with irresistible, and development prospect is infinitely wide!
Above we have explained the principle and the meaning of hydraulic transmission wind-driven generator, hydraulic transmission is very universal, but the working environment of wind-powered electricity generation machine is more abominable; Special in the winter time along with the reduction of temperature; The hydraulic pressure oil viscosity can increase, and the oil resistance can increase, and reduces hydraulicdriven efficient.If temperature is too low, condensing of oil pipe might appear, and the hydraulic transmission wind-driven generator can't be worked.Also have the blower fan use amount in wind-powered electricity generation base very big, the consumption of hydraulic oil also can be very big, and cost can be very high.Another mode adopts gas as driving medium exactly; Can change oil hydraulic pump into pneumatic pump; Air gets into the air pump pressurization through filter, outputs to gravity energy storage device then, and gravity energy storage device plays the effect of energy storage and voltage stabilizing equally; Gravity energy storage device connects the gas motor, drives generator by the gas motor and steadily generates electricity.Air-driven characteristics are that the pipeline of output is simpler, owing to the other end air outlet and atmosphere, therefore only need the pipeline of output, have saved the pipeline of backflow.The resistance consumption that air-driven another advantage is a pipeline reduces significantly, and the distance of transmission is farther, just can carry out greater number, wider blower fan connects operation, and this all is very favorable to improving operational efficiency, reducing cost.Can find out that from top analysis the adaptability of air transmission can be better, cost also can be lower.
Description of drawings:
Below in conjunction with accompanying drawing structure of the present invention and principle are further specified.
Fig. 1 is the structure principle chart of novel hydraulic transmission wind power generation machine of the present invention.
Among the figure 1, flexible intelligent plumage shape blade, 2, main shaft, 3, oil hydraulic pump, 4, output oil pipe, 5, input oil pipe, 6, weight, 7, plunger, 8, oil cylinder, 9, hydraulic oil, 10, generator, 11, oil hydraulic motor, 12, support.
We can find out that the blower fan head is fixed on the support (12) from Fig. 1; The blower fan head can rotate on the vertical pivot of support; The blower fan head mainly contains flexible intelligent plumage shape blade (1), main shaft (2) and oil hydraulic pump (3) and constitutes, and flexible intelligent plumage shape blade recedes, and forms the conical surface and arranges; Wind wheel is installed in the rear of support shaft, belongs to formula blower fan with the wind.Wind wheel under the effect of wind-force owing to receive the tension of support shaft; The tip of wind wheel cone is all the time towards the direction of the wind comes from; Can adjust the windward side automatically as shuttlecock, so just realize that blower fan regulates the requirement of windward side automatically, thereby obtained maximal wind-energy.This structure has saved yaw device, does not have mechanical failure, also can not regulate and control malfunctioningly, and the adjusting meeting in the horizontal direction of wind-powered electricity generation machine is free more, and is more accurate.
Flexible intelligent plumage shape blade (1) blowing area is big, in light weight, and cost is low.Wind wheel can adopt six blade structures, and owing to increasing of blade, blowing area significantly increases; Wind wheel can be realized the output of high pulling torque; Blade merrily and lightheartedly also is suitable for higher rotation speed, therefore can drive the rotation of oil hydraulic pump (3) high pulling torque, higher rotation speed, significantly improves the delivery efficiency of oil hydraulic pump.The high pressure oil of oil hydraulic pump (3) output is connected on the oil cylinder (8) through output oil pipe (4).
Oil cylinder (8) and plunger (7), weight (6) are formed gravity energy storage device; Because the area of plunger is fixed; Weight of heavy also is certain, also is certain to hydraulic oil (9) applied pressure therefore, so just can guarantee that the pressure of the hydraulic oil of oil hydraulic cylinder (8) output also is certain.Oil pipe (4) is to oil hydraulic cylinder (8) input hydraulic pressure oil; At first the volume of oil hydraulic cylinder is bigger; The oil pressure of hydraulic oil is unstable in the oil pipe (4), and the impact energy of hydraulic oil can obtain buffering in oil hydraulic cylinder, and hydraulic oil promotion plunger (7) and weight (9) move up and just stored gravitational potential energy.Mainly by the capacity decision of hydraulic oil, in order to store more energy, we can be provided with a plurality of gravity energy storage devices and carry out parallel connection the size of stored energy.Gravity energy storage device is to guarantee the stable key of oil pressure, so we before being incorporated into the power networks, at first will be full of gravity energy storage device.When wind speed hour, the hydraulic oil that flows into gravity energy storage device is certain to less than flowing out, the energy of gravity energy storage device is through being certain to run out of after a while, this moment, we will let wind-powered electricity generation machine off-grid, the generator generation outage; Let blower fan drive oil hydraulic pump gravity energy storage device is continued energy storage, generate electricity by way of merging two or more grid systems after being full of again, go round and begin again like this, we just can guarantee under less wind conditions still can stable electric generation, stablizes and is incorporated into the power networks.
The hydraulic oil of gravity energy storage device output gets into oil hydraulic motor (11) through oil pipe; Because we have guaranteed the stable of oil pressure; We can design the rotating speed of oil hydraulic motor (11) and the rotating speed of generator (10) matees fully, and we can also adopt the synchronous excitation power generation system, so just can guarantee fully that generator and electrical network are with the frequency homophase; And also can guarantee identical with the voltage of electrical network, generator just can be directly and electrical network be incorporated into the power networks.This and net mode is significant, the cost of grid-connection device is very big now, and every typhoon motor increases low voltage and passes through function and just need 20～300,000, can't solve the problem of being incorporated into the power networks.Frequency variator and current transformer, the pressure stabilizing device again 20～300,000 that boosts, and these equipment maintenance cost are also high, saved these equipment now and just significantly reduced overall cost.Competitive advantage is more obvious.
Claims (2)
1. a novel fluid transmission wind power generation device is made up of critical pieces such as blower fan head, support, gravity energy storage device, motor and generators, and structure characteristic is that wind power generating set is to lean on liquid or gas to carry out transmission, and electricity generating device is placed on ground; The blower fan head is fixed in the air through support, and the blower fan head has only blade, main shaft and oil hydraulic pump (or pneumatic pump) to form, and the high-pressure liquid of blower fan head outputs to ground; Be provided with gravity energy storage device on ground; Gravity energy storage device mainly contains cylinder body, plunger, connecting pipeline and configuration weight and constitutes, and gravity energy storage device is exactly to utilize the high-pressure liquid of blower fan output to promote plunger, jack-up weight; Store gravitational potential energy; Size all is identical and gravity is in any position, and gravity is exactly a fixed value to the pressure of energy storage cylinder body inner fluid, and the hydrodynamic pressure that so just can guarantee energy storage device output is steadily fixing; Fluid through the gravity energy storage device voltage stabilizing will drive the stable running of oil hydraulic motor (or pneumatic motor); Oil hydraulic motor (or pneumatic motor) drives generator for electricity generation, and the electricity that sends also is stable, and what so just guaranteed to be incorporated into the power networks stablizes.
2. the novel fluid transmission wind power generation device of narrating according to claim 1; It is characterized in that the blower fan head adopts postpositional blade formula structure with the wind, blade adopts " flexible intelligent plumage shape blade ", and leaf weight is light; Cost is low; Output torque is big, and it is low to start wind speed, can improve the delivery efficiency of oil hydraulic pump.This technology is my another patent of invention technology " postpositional blade type wind power generating device efficiently ", number of patent application (201010161689.8).
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| CN2011101082715A CN102748236A (en) | 2011-04-22 | 2011-04-22 | Novel fluid transmission wind driven generator for guaranteeing stability of grid connection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102900625A (en) * | 2012-10-26 | 2013-01-30 | 浙江日月昇科技有限公司 | Intelligent ultrahigh power hydraulic power-transferring low-wind-speed wind generating set |
| CN104153819A (en) * | 2014-07-25 | 2014-11-19 | 邓雪明 | Gas pressure generator |
| CN104564532A (en) * | 2014-12-30 | 2015-04-29 | 北京宏孚瑞达科技有限公司 | Wind power storage and output system |
| CN106438201A (en) * | 2015-08-07 | 2017-02-22 | 张财年 | Qiu mountain wind generating set |
| CN107299879A (en) * | 2016-04-16 | 2017-10-27 | 李江平 | A kind of high ferro circuit wind power generation plant |
| CN112648145A (en) * | 2020-01-22 | 2021-04-13 | 卜庆春 | Supercritical fluid high-power wind driven generator |
| CN114718684A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity hydraulic compressed air energy storage system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900625A (en) * | 2012-10-26 | 2013-01-30 | 浙江日月昇科技有限公司 | Intelligent ultrahigh power hydraulic power-transferring low-wind-speed wind generating set |
| CN102900625B (en) * | 2012-10-26 | 2015-09-30 | 浙江日月昇科技有限公司 | A kind of low wind speed wind power generator group of intelligent superhigh power fluid power transferring power |
| CN104153819A (en) * | 2014-07-25 | 2014-11-19 | 邓雪明 | Gas pressure generator |
| CN104564532A (en) * | 2014-12-30 | 2015-04-29 | 北京宏孚瑞达科技有限公司 | Wind power storage and output system |
| CN106438201A (en) * | 2015-08-07 | 2017-02-22 | 张财年 | Qiu mountain wind generating set |
| CN106438201B (en) * | 2015-08-07 | 2023-10-17 | 张财年 | Shanfeng force generator set |
| CN107299879A (en) * | 2016-04-16 | 2017-10-27 | 李江平 | A kind of high ferro circuit wind power generation plant |
| CN107299879B (en) * | 2016-04-16 | 2019-02-26 | 李江平 | A kind of high-speed rail route wind power generation plant |
| CN112648145A (en) * | 2020-01-22 | 2021-04-13 | 卜庆春 | Supercritical fluid high-power wind driven generator |
| WO2022155911A1 (en) * | 2020-01-22 | 2022-07-28 | 卜庆春 | Supercritical fluid high-power wind driven generator |
| CN114718684A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity hydraulic compressed air energy storage system and method |
| CN114718684B (en) * | 2022-06-08 | 2022-09-20 | 西安热工研究院有限公司 | Gravity hydraulic compressed air energy storage system and method |
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Application publication date: 20121024 |