EP2745005A1 - Dispositif convertisseur d'énergie destiné à des installations d'énergie et procédé permettant de faire fonctionner un dispositif associé - Google Patents

Dispositif convertisseur d'énergie destiné à des installations d'énergie et procédé permettant de faire fonctionner un dispositif associé

Info

Publication number
EP2745005A1
EP2745005A1 EP12750325.8A EP12750325A EP2745005A1 EP 2745005 A1 EP2745005 A1 EP 2745005A1 EP 12750325 A EP12750325 A EP 12750325A EP 2745005 A1 EP2745005 A1 EP 2745005A1
Authority
EP
European Patent Office
Prior art keywords
energy
pressure
hydraulic
control circuit
converter device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12750325.8A
Other languages
German (de)
English (en)
Inventor
Kristof SCHLEMMER
Norbert BÖHMER
Franz Fuchshumer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydac System GmbH
Original Assignee
Hydac System GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydac System GmbH filed Critical Hydac System GmbH
Publication of EP2745005A1 publication Critical patent/EP2745005A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/17—Combinations of wind motors with apparatus storing energy storing energy in pressurised fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/28—Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/406—Transmission of power through hydraulic systems
    • 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
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the work leading to this invention has been funded under the Seventh Framework Program of the European Union (FP7 / 2007-2013) under Grant Agreement No 239376.
  • the invention relates to an energy conversion device for power converters for mechanical to hydraulic conversion and further to electrical energy, which uses a control fluid as the energy transport medium, which receives a variably changing pressure from at least one first converter device, which converts the mechanical into hydraulic energy, and at least one second subsequent converter device, which converts the hydraulic into electrical energy.
  • the invention also relates to a method for operating a device of this type.
  • Energy that can be used in the environment also includes the energy of ocean waves, which according to preliminary estimates could cover at least about 1 5% of global electricity demand.
  • energy conversion devices with various active principles are known.
  • One possible implementation principle is based on a two-mass system floating in the water, whereby the two masses used are lent to each other different natural frequencies perform different relative movements to each other, due to the wave motion.
  • the pertinent relative movements of the masses to one another can be converted into pumping movements of working cylinders, such as hydraulic cylinders, in order then to obtain electrical energy, for example via a generator, which in this respect generates the hydraulic energy through the working cylinders, caused by the mechanical energy in the form of the wave motion , converted into usable electricity.
  • a so-called point-absorbing wave energy conversion means for recovering energy from wave motion on the surface of a body of liquid and having dimensions small relative to the wavelength of the dominant wave.
  • the known solution has two relatively mutually movable devices in the form of two movable individual masses, wherein the first device comprises a floating body and the second device has a submerged body below the surface of the liquid body. Furthermore, hydraulic working cylinders are arranged between these two mass devices, which due to the relative movement of the individual masses to one another, caused by the shaft movement, perform lifting movements for an energy transfer from mechanical to electrical energy.
  • two-mass systems When doing so floating in the water two-mass systems often results in a time lag between the movement of the shaft and the tracked movement of at least one of the masses of the two-mass system with the result that the mass movement can be stopped or at least slowed down, which is the case for example when the Amplitude of the wave after passing through a wave trough already increases again, while at least one of the two masses is still in time in the downward movement in the direction of the wave trough and then slowed or stopped by the already rising wave in this movement. Due to this "retarding moment", the described energy conversion is impaired or even brought to a standstill.
  • 2005/069824 A2 described an energy conversion device, which allows, with the inclusion of a corresponding sensor, a generator for generating electricity, caused by the wave motion, and a corresponding mechanical transducer path in the form of a rack and pinion so briefly switch to a motor operation that at least a portion of the previously recovered energy can be used again to drive a conditionally set by the wave motion in the direction of the ground mass such that the addressed dead-center phases are overcome.
  • the Energywandler worn can be used either as a generator in energy gain mode or engine operation as a driving control force for the respective mass of the Energywandler issued so as to ensure a basic movement situation from which the mass can be moved easily from the shaft, as if she is in a slowed-down state or even at rest.
  • energy yield so far, however, energy is lost in the engine operation of the device for driving the mass out of the respective shaft dead center zone, which reduces overall the possible energy yield.
  • This known device employs a wave energy absorber which is movable by the action of waves and which is capable of driving a plurality of actuators. tuatoren a wave energy conversion device is coupled to these.
  • Each actuator has a defined attenuation characteristic, which together form a sum-attenuation characteristic of the wave energy conversion device, wherein a target attenuation value of the wave energy conversion device is adjusted by means of a control device as a function of measured parameters at the wave energy absorption device.
  • the pertinent control device further controls one or more of the actuators in selective operation in order to set the desired damping characteristic as a function of the measured parameters of the wave energy absorption device.
  • the magnitude, height and frequency of a wave motion vary greatly and thus also the absolute value of motion quantities as well as the relative value of the bodies excited by it in the form of the moving individual masses. Due to the variable behavior of the wave motion, it has been found in practice that the conversion of the mechanical energy associated therewith into electrical energy poses problems in the sense that no uniform current output is achieved and / or that due to feedback processes the mechanical Wave machine "is stopped by the respective working cylinders are stopped in their movement or at least greatly slowed down.
  • Control circuit is guided, which are operatively connected to each other for energy transfer via a coupling device, wherein the one control circuit of energy supply, in particular in the form of mechanical energy and the other control circuit energy removal in the form of converted energy, in particular in the form of electrical energy is used.
  • the well-known division into two different control circuits can be the operate arranged coupling device such that the power supply is separated in one control circuit from the energy removal in the other control circuit at least to the extent that they do not interfere with each other in their operation, with the result that adverse feedback effects, especially in the direction of energy supply for the Converter device are avoided with certainty.
  • the invention is based on the object, while maintaining the other advantages of the prior art, namely to provide an energy conversion device that can process reliably and almost no feedback different energy forms into each other to optimize such that further improved energy yield can be achieved with reduced technical complexity and thus in a cost effective manner.
  • the second converter means is divided into a first control circuit and a second control circuit, both of which can be supplied on its input side with the control fluid variable pressure from the first transducer means and aufwei the predominantly different levels of pressure - sen, a solution is provided which helps at different wave amplitudes of the upstream energy supply device, for example in the form of a two-mass wave system, the so introduced into the energy conversion device energy split into different hydraulic circuits of the second converter device to such the energy efficiency of the overall converter device to improve.
  • the energy introduced into the converter device is supplied predominantly to the first control circuit designed as a medium-pressure part, in order to generate current by means of a connected generator, whereas with a wave movement with a larger amplitude the associated energy components additionally or alternatively are stored in the designed as a high-pressure part second control circuit of the second converter means, then also by means of a generator to obtain electrical energy or energy shares within the high-pressure part store, which allows these stored energy components later partially or entirely to support the operation of the medium-pressure part use, which is preferably the case when the wave energy supply device can no longer supply sufficient energy into the converter device.
  • the first transducer means is completely decoupled from the second transducer means and yet with the second transducer means by retrieving energy from the high pressure member, with surprising results in the direction of the medium-pressure part, further electrical energy can be obtained, so that it is not necessary, as shown in the prior art, to keep the wave energy feed device in operation by feedback with opposing energy reflux in order to achieve the described "dead center behavior". counteract.
  • both converter devices are preferably part of a common individual fluid-conducting control circuit with the variable-pressure control fluid, the mechanical energy can be converted into electrical energy via the hydraulic energy in a few conversion steps, which is much more favorable in terms of energy than if two separate control circuits were used Variety of then accompanying change steps the addressed energy conversion makes.
  • the medium-pressure and the high-pressure part can be connected in parallel within the common control circuit.
  • the medium-pressure and high-pressure parts can be designed to be separable from one another on their input side by means of a valve device.
  • the valve device is particularly preferably designed as a check valve, which preferably opens in the flow direction from the medium-pressure part to the high-pressure part and blocks the other way round. In this way, the pressure level of the high-pressure part on the input side can be decoupled from that of the medium-pressure part for the above-described mode of operation.
  • Suction volume of the hydraulic motors are constantly changed so that sets as constant as possible shaft speed for each generator.
  • the first converter device has at least one hydraulic working cylinder, which converts the mechanical wave energy of a shaft system as a feed device into hydraulic energy with a variable pressure component.
  • a plurality of rows of first and second converter devices can be coupled to one another.
  • each row of first and second converter device may be formed with a specific maximum electrical power, wherein the individual rows are in their maximum electrical Performance can differ from each other.
  • the medium-pressure parts and the high-pressure parts may be used such that the respectively supplied by the first converter means control fluid quantity of lower or middle pressure preferably from the medium-pressure part and the control fluid quantity with the contrast higher pressure preferably from the respective high-pressure part in electrical energy to be converted.
  • a first row of first and second transducer means can be adapted to a very small wave motion in a manner adapted to the energy input; a second comparable series of medium amplitude wave motion and optionally a third series of very high amplitude wave motion.
  • each Energywandler- device can be adapted for an optimal operating range of the prevailing wave movements.
  • the first converter means of the different rows may be arbitrarily combined with one or more second converter means of other rows, thereby permitting a finer gradation of adjustment of the operating range.
  • the energy conversion device according to the invention can also be used in the context of the operation of wind turbines or the like, in which case the first converter device does not have hydraulically actuable working cylinders but instead has, for example, a hydraulic pump. In such a way, a homogenization of the energy output could then be achieved via the addressed high-pressure part of the second converter device.
  • other wave energy feed systems can occur, in which the masses movable by waves, for example in chain form, are arranged next to one another in succession.
  • a solution of the invention task is also achieved by a method according to the independent claim 1 1, that the operation of an energy conversion device as described above, wherein the gel ieferte from the first transducer means fluid quantity with lower pressure preferably from the Mittelbuchtei l and the Fl Uidmenge with the contrast, higher pressure from the Hoch réelletei l converted into electrical energy wi rd.
  • the energy conversion device according to the invention is explained in more detail by means of egg nes embodiment of the drawing. At the same time, in principle and not in the scale of the description, they show the
  • FIG. 1 shows the basic structure of a wave energy supply device in the manner of a two-mass oscillation system
  • FIG. 1 shows, in the manner of a greatly simplified, schematic functional representation, the basic construction of a shaft system 31 as an energy supply device.
  • the wave device 31 is constructed in the manner of a buoy and has a first float body as a pile float 39 and a radially surrounding second
  • the pile float 39 has a larger mass than the ring float 41 and so far forms a two-mass wave energy plant, as shown by way of example in the above-described DE 601 1 5 509 T2.
  • the pile float 39 thereby has a lower natural frequency than the ring float 41.
  • the ring float 41 is axially movable relative to the pile float 39.
  • Trained as an energy system 2 or as energy supply device shaft system 31 is connected upstream of an energy conversion device 1, as shown by their basic structure as a hydraulic circuit diagram in FIG.
  • the energy conversion device 1 can be an integral part of the wave system 31 according to FIG. 1; but there is also the
  • the energy conversion device 1 is used to convert mechanical into hydraulic see and further into electrical energy, the mechanical energy from the relative movement of the ring float 41 relative to the pile float mer 39 is won.
  • the energy conversion device 1 further has a control fluid 3 used as an energy transport medium.
  • the control fluid 3 is provided by at least one first converter device 5, which converts the mechanical to hydraulic energy, with a variably varying pressure PM.
  • the energy converter device 1 further comprises a second converter device 7, which converts the hydraulic energy into electrical energy.
  • the second converter device 7 is divided into a middle-pressure part 9 as the first control circuit and a high-pressure part 11 as the second control circuit.
  • the medium-pressure part 9 and the high-pressure part 11 are mixed with the control fluid 3 of variable pressure PM on its input side 13 of FIG supplied first converter means 5 ago.
  • Both converter devices 5, 7 are part of a common fluid-carrying central control circuit 1 5, which is designed in the embodiment shown in Figure 2 as a kind of closed loop.
  • the medium-pressure part 9 and the high-pressure part 1 1 within the common control circuit 1 5 are connected in parallel to each other and on its input side 1 3 of a valve means 1 7, which is in the embodiment shown in Figure 2 as a check valve 1 9 is formed, separable from each other ,
  • the remindschlagventi l 19 can be overflowed from the middle pressure part 9 to the high pressure part 1 1 out and locks in the reverse flow direction.
  • the medium-pressure part 9 and the high-pressure part 11 each have an adjustable hydraulic motor 21, 23 with a variable displacement. Both hydraulic motors 21, 23 serve for a common drive of a generator 25 for obtaining electrical energy. In an embodiment not shown in detail, it would also be possible, instead of a generator 25, to associate each individual element 9, 11 of the second converter device 7 with its own generator. As seen in the viewing direction on the Fig. 2 seen on the right side, the high-pressure part 1 1 with a hydraulic accumulator 27th provided, which is connectable by means of a check valve 26 to the input side 1 3 of said high-pressure part 1 1.
  • the hydraulic accumulator 27 can be isolated from the rest of the hydraulic common control circuit, which can also be used to cause a short term pressure increase in the high pressure part on the storage pressure level addition.
  • an electrically operable 2/2-way valve 45 is connected between one, the input side 1 3 of the high-pressure part 1 1 and the medium-pressure part 9 forming the control fluid line 43 and the hydraulic motor 21, an electrically operable 2/2-way valve 45 is connected.
  • a functionally identical 2/2-way valve 47 is connected.
  • the valves 45, 47 are each used to block the inflow of the control fluid 3 to the respective hydraulic motors 21, 23 or for applying the same with control fluid 3.
  • the medium-pressure part 9 and the high-pressure part 1 1 are thus suitable, depending on the switching position of the valves 45, 47 also individually to provide for the drive of the generator 25; and regardless of the current setting of the respective absorption volume of the hydraulic motors 21, 23, which is adjustable to a zero Schl uckvolumenstrom.
  • the medium-pressure part 9 has a bypass line 49 a, which is provided with a check valve 55 and connects the inlet of the medium-pressure side hydraulic motor 21 with the output side 28 of the control circuit 15.
  • the bypass line 49a makes it possible for the hydraulic motor 21, in the event of an abrupt elimination of the control fluid supply, for example when closing the valve 45, to draw in control fluid 3 from the outlet side 28 without causing cavitation phenomena as a result of the inertia-related trailing of the hydraulic motor 21.
  • the check valve 55 blocks.
  • a second bypass line 49b which is provided with a check valve 53, allows an outflow of excess control fluid to this side with an increase in the pressure at the inlet of the hydraulic motor 21 through the pressure on the input side 13.
  • the high pressure part 1 1 points in Similarly, two bypass lines 51 a and 51 b, which have check valves 57, 59 and perform the same functions for the high-pressure side hydraulic motor 23 as based on the bypass lines 49 a, 49 b and the check valves 53, 55 for the low or medium pressure side Hydromotor 21 shown.
  • the first converter device 5 is provided with a bypass line 61 between the input side 1 3 and said output side 28.
  • a pressure limiting valve 63 is connected, which is connected in parallel to a check valve 60.
  • Converter device 7 has a further third bypass line 65 between the input side 13 and the output side 28 at the end of the control circuit 15, in which the input-side high pressure is converted into a medium pressure circuit which forms the output side 28 of the common control circuit 1 5.
  • a pressure limiting valve 67 is connected in the pertinent third bypass line 65.
  • the two pressure limiting valves 63, 67 serve primarily to protect the input side 1 3 of the control circuit 15 and its components against overpressures of the control fluid 3. If, due to an excessively high input power at the first converter device 5, there is an oversupply of control fluid which can not be completely processed by the second converter device 7, the control fluid is discharged via the pressure limiting valves 63, 67 to the output side.
  • the first converter device 5 has as an actuator a hydraulic working cylinder 29 in the manner of a crosstalk cylinder.
  • a hydraulic working cylinder 29 in the manner of a crosstalk cylinder.
  • FIG. 2 For the sake of simplicity, only one working cylinder 29 is shown in FIG. 2 for the first transducer device 5, whereas in the illustration according to FIG. 1 two working cylinders 29 are shown as part of the first transducer device 5. 1 further shows, the pertinent actuators or working cylinders 29 are connected to the power plant 2 in such a way that that shaft movements in working movements of the piston rod portion 75 of the respective working cylinder 29 can be converted. If the hydraulic working cylinder 29 shown in FIG.
  • the converter device 5 shown in Fig. 2 implements the DC characteristic such that a differential cylinder 29 is suitably combined with a series of check valves, whereby the non-uniform cylinder assumes the described behavior of a uniform cylinder with respect to the delivered volumetric flows and pressures.
  • a control device designated as a whole by 77 which is provided in particular with two regulators 79 and 81, is used, for example in the embodiment as a PID controller.
  • the controller 79 receives the variable pressure value PM on the medium-pressure side and the regulator 81 receives the high-pressure value PH on the high-pressure side of the input side 13 of the control circuit 15.
  • the pertinent pressure value specification is compared with respect to the controller 81 with a predetermined setpoint Psoii, for example, comes from a computer unit, not shown.
  • the input pressure pD.soii for the controller 79 is the damping force characteristic of Figure 4, converted to the damping pressure in the working cylinder 29 taken.
  • the pressure in the memory 27 is maintained at a predetermined pressure level, which passes as an input p soii on the regulator input side of the controller 79.
  • the energy conversion device 1 according to FIG. 2 is adjusted to this sol lvorgabewert the memory 27.
  • the medium-pressure part of the converter device 7 is separated from the high-pressure part with the hydraulic accumulator 27 by the non-return valve 1 7 and does not itself have a memory, the medium-pressure part is characterized by a high hydraulic rigidity, which makes it possible to set the damping pressure p 0 and thus the Damping force FD in the region of the linear increase in Figure 4 to regulate very accurately.
  • the aforementioned input variable PDSOII is hereby adjusted in the context of the controller 79 with the pressure input variable PM coming from the medium-pressure side.
  • controllers 79 and 81 receive a speed value specification n and / or the specification of the angular velocity ⁇ of a shaft 83 of the generator 25 on its input side, whereas on the output side both controllers 79, 81 specify the displacement volume of the hydraulic motors 21, 23 as the manipulated variable.
  • the pivot angle is infinitely controlled by said control device 77 using not illustrated dargestel lten actuating means.
  • the energy conversion device with its associated control device 77 allows fast drive and control operations to set the desired damping force and thus convert the introduced wave energy accordingly by means of said converter means 5, 7 into electrical energy.
  • FIG. 3 shows, in the manner of a hydraulic circuit diagram, an overall system 33 which has been enlarged in terms of performance and which in the present exemplary embodiment consists of two rows 35, 37 of two energy converter devices according to FIG.
  • the same reference numerals have been used for the same components, as shown in FIG. 2, and the statements made so far also apply accordingly to the embodiment according to FIG. 3.
  • the solution also allows maintenance on a shutdown energy converter device 1, while the other is still in operation.
  • a cascade operation is provided, which makes it possible to cover with the different rows 35, 37 on transducer devices 1 different wavelength ranges during operation of the power plant 2.
  • one row can evaluate 35 smaller wave amplitudes and use them for energy conversion, whereas the other row 37 is put into operation for waves of higher amplitudes.
  • To couple the two rows 35, 37 together serve arranged between the rows switching valves 85th
  • the solution according to the invention does not need to be limited to use with shaft systems 31, but can also be used for other energy systems.
  • an "intermittently" operating displacement device such as a hydraulic pump or the like may occur.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un dispositif convertisseur d'énergie destiné à des installations d'énergie (2), pour la conversion d'énergie mécanique en énergie hydraulique, puis en énergie électrique. Ledit dispositif utilise comme agent de transport d'énergie un fluide de commande (3), qui reçoit une pression variable d'au moins un premier système convertisseur (5) qui convertit l'énergie mécanique en énergie hydraulique. Est prévu selon l'invention au moins un deuxième dispositif convertisseur d'énergie (7) suivant, qui convertit l'énergie hydraulique en énergie électrique. Ledit dispositif convertisseur d'énergie est caractérisé en ce que le deuxième système convertisseur (7) est divisé en un premier circuit de commande (9) et en un deuxième circuit de commande (11), lesquels circuits peuvent tous deux être alimentés sur leur côté entrée (13) en fluide de commande (3) sous pression variable par le premier système convertisseur (5) et qui présentent des niveaux de pression nettement différents.
EP12750325.8A 2011-08-20 2012-08-16 Dispositif convertisseur d'énergie destiné à des installations d'énergie et procédé permettant de faire fonctionner un dispositif associé Withdrawn EP2745005A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011111219A DE102011111219A1 (de) 2011-08-20 2011-08-20 Energiewandlervorrichtung für Energieanlagen und Verfahren zum Betrieb einer dahingehenden Vorrichtung
PCT/EP2012/003479 WO2013026548A1 (fr) 2011-08-20 2012-08-16 Dispositif convertisseur d'énergie destiné à des installations d'énergie et procédé permettant de faire fonctionner un dispositif associé

Publications (1)

Publication Number Publication Date
EP2745005A1 true EP2745005A1 (fr) 2014-06-25

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EP12750325.8A Withdrawn EP2745005A1 (fr) 2011-08-20 2012-08-16 Dispositif convertisseur d'énergie destiné à des installations d'énergie et procédé permettant de faire fonctionner un dispositif associé

Country Status (7)

Country Link
US (1) US20140159380A1 (fr)
EP (1) EP2745005A1 (fr)
CN (1) CN103608580A (fr)
AU (1) AU2012299857A1 (fr)
BR (1) BR112014003383A2 (fr)
DE (1) DE102011111219A1 (fr)
WO (1) WO2013026548A1 (fr)

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GB201104843D0 (en) * 2011-03-23 2011-05-04 Crowley Michael D Wave energy conversion
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CN103608580A (zh) 2014-02-26
AU2012299857A1 (en) 2014-01-23
WO2013026548A1 (fr) 2013-02-28
BR112014003383A2 (pt) 2017-03-01
US20140159380A1 (en) 2014-06-12
DE102011111219A1 (de) 2013-02-21

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