CN103047075A - Ocean current energy power generation device and control method thereof - Google Patents
Ocean current energy power generation device and control method thereof Download PDFInfo
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- CN103047075A CN103047075A CN2013100072876A CN201310007287A CN103047075A CN 103047075 A CN103047075 A CN 103047075A CN 2013100072876 A CN2013100072876 A CN 2013100072876A CN 201310007287 A CN201310007287 A CN 201310007287A CN 103047075 A CN103047075 A CN 103047075A
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Abstract
The invention relates to an ocean current energy power generation and a control method thereof. The ocean current energy power generation comprises an impeller, a first variable-displacement hydraulic pump directly driven by the impeller and a controller, an inlet of the first variable-displacement hydraulic pump is connected with an inlet of a variable-displacement hydraulic motor via a first one-way way, the variable-displacement hydraulic motor is provided with a first output shaft and a second output shaft, the first output shaft is connected with a spindle of an engine, the second output shaft is connected with a spindle of a second variable-displacement hydraulic pump, an outlet of the second variable-displacement hydraulic pump is connected with the inlet of the variable-displacement hydraulic motor via a second one-way valve, the second variable-displacement hydraulic pump and the variable-displacement hydraulic motor form an oil liquid circulation loop, and the controller sends displacement control signals for the first variable-displacement hydraulic pump, the second variable-displacement hydraulic pump and the variable-displacement hydraulic motor. By the aid of a hydraulic transmission mode, impact of ocean current flow velocity fluctuation on a system is low, and maximum power tracking control of the impeller and constant-frequency output control of a generator can be achieved.
Description
Technical field
The present invention relates to a kind of ocean current energy generator and controlling method thereof.
Background technique
At present, country vigorously advocates the renewable energy sources of development cleaning, and it is the field of another primary study after wind energy, the solar energy that energy by ocean current becomes, and it has the advantages such as energy density height, predictability are strong.Ocean current energy generator from the net type can solve isolated island power supply hard problem, has very large realistic meaning and researching value.Similar with wind energy conversion system, ocean current energy generator exists front end wheel speed and the unmatched phenomenon of rear end generator rated speed, and the energy that therefore need to have a transmission system that impeller is caught passes to generator.Transmission system directly has influence on performance and the efficient of whole ocean current energy generator.
Traditional transmission system generally is a step-up gear.The advantage of gearbox drive is to have very high mechanical efficiency, and its mechanical efficiency is generally more than 95%.Similar with wind energy conversion system, the energy that ocean current energy generator is caught fluctuates along with the fluctuation of ocean current flow velocity, and the moment of torsion of gear-box transmission also changes thereupon, and the gear-box long-term work is easy to occur fatigue ruption under alternate load.According to statistics, gearbox fault occupies very large ratio in the wind energy conversion system fault.Deficiency for conventional gearbox exists has proposed hydraulic transmission, has fundamentally solved the problem of gear-box fatigue failure.Hydraulic transmission has higher flexibility, can buffering impeller catches the fluctuation of energy, can realize stepless change simultaneously.
Desirable ocean current energy generator Hydraulic Power Transmission System can realize the control of two aspects, the one, and the control of impeller maximum energy capture, the 2nd, generator constant speed control.The control of impeller maximum energy capture refers to: along with the variation of ocean current flow velocity, for an impeller that geometrical construction is constant, all the time there is an optimum tip-speed ratio, its energy capture efficient was maximum when impeller was operated in optimum tip-speed ratio, the rotating speed of control impeller, make impeller under the ocean current flow velocity that is changing, follow the tracks of optimum tip-speed ratio, be maximum energy capture control.The generator constant speed control refers to: generator speed does not change with the size variation of load, always works in the rated speed of generator.
Publication number is the patent of invention of CN101350589, has proposed a kind of based on hydraulicdriven current power generation speed-changing constant frequency method and device thereof.The essence of this system is to drag a variable displacement motor realizing stepless change by a variable displacement pump, the impact that the press and flux pulsation by an accumulator absorption system brings.The press and flux pulsation of system is mainly from two aspects, and the one, from the pulsation of variable displacement pump rotating speed, i.e. the variation of wheel speed; The 2nd, from the inherent structure of positive displacement variable displacement pump, i.e. limited cavity volume.There is a natural angular frequency ω in accumulator in the system
A, the ripple frequency ω of system
sMore near ω
A, the effect of accumulator Absorbing Fluctuation is better; As the ripple frequency ω of system
sAway from ω
AThe time, accumulator does not have the effect of Absorbing Fluctuation.The operating mode of ocean current energy generator reality is complicated, its system pressure pulsation is distributed on the wider frequency field, in some frequency ranges, the effect of the Absorbing Fluctuation that accumulator plays is very little, therefore inevitably there is rigid impulse in the system of this patent proposition, and this is a large defective of this system.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of ocean current energy generator and controlling method thereof, adopt hydraulic transmission mode, the fluctuation of ocean current flow velocity is little to the impact that system brings, and can realize the constant frequency output control of the control of impeller maximal power tracing and generator.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
Ocean current energy generator, comprise the impeller that is promoted rotation by ocean current, the first volume adjustable hydraulic pump that is directly driven by impeller, the entrance of the first volume adjustable hydraulic pump connects fuel tank, the outlet of the first volume adjustable hydraulic pump is through the entrance of the first one-way valve link variable oil hydraulic motor, the outlet of variable hydraulic motor connects fuel tank, variable hydraulic motor has the first output shaft and the second output shaft, the main shaft of described the first output shaft connecting engine, the output terminal of this generator connects load, described the second output shaft connects the main shaft of the second volume adjustable hydraulic pump, the entrance connected tank of the second volume adjustable hydraulic pump, the outlet of the second volume adjustable hydraulic pump connects the entrance of variable hydraulic motor through the second one-way valve, but the second volume adjustable hydraulic pump and variable hydraulic motor consist of the oil circulation loop of absorption system pulsation; The flow transducer of measuring the ocean current flow velocity is equipped with at described impeller place, on impeller and the main shaft that the first volume adjustable hydraulic pump is connected the first speed probe is housed, on the hydraulic pipe line of variable hydraulic motor entrance pressure transducer is housed, the second speed probe is housed on the main shaft of generator, described flow transducer, the first speed probe, pressure transducer, the signal of the second speed probe collection all is transferred to controller, and controller sends the displacement control signal of the first volume adjustable hydraulic pump, the displacement control signal of the second volume adjustable hydraulic pump, and the displacement control signal of variable hydraulic motor.
Further, be connected with accumulator through cut-off on the entrance pipe of described variable hydraulic motor.Accumulator can the absorption system medium frequency near the pulsation of accumulator natural angular frequency, make hydraulic system keep stable.
Further, be connected with relief valve on the entrance pipe of described variable hydraulic motor.Can initialization system pressure by relief valve, when system pressure is too high, can pass through relief valve release portion hydraulic oil, make the system pressure value maintain the setting oil pressure relief value of relief valve, avoid that system pressure is too high to cause damage to system.
The controlling method of above-mentioned ocean current energy generator:
1) rotating speed of impeller depends on countertorque suffered when ocean current is applied to the torque on the impeller and drags the first volume adjustable hydraulic pump, described flow transducer is transferred to controller with current flow velocity signal, controller obtains the best wheel speed that will realize that the impeller maximum energy capture is required according to current ocean current flow relocity calculation, controller detects current wheel speed by the first speed probe and compares with best wheel speed, controller is controlled the discharge capacity of the first volume adjustable hydraulic pump according to the comparison value of current wheel speed and best wheel speed, thereby change it and be applied to countertorque on the impeller spindle, thereby wheel speed is adjusted to best wheel speed, to realize the control of impeller maximum energy capture;
2) pressure transducer is transferred to controller with the system's current pressure signal that collects, controller compares system's current pressure and predefined force value, calculate the required discharge capacity of variable hydraulic motor according to its difference, the discharge capacity regulating system pressure of controller controlled variable oil hydraulic motor is to predefined value; The current generator speed signal that the second speed probe will collect is transferred to controller, controller compares the current rotating speed of generator and generator rated speed, controller is controlled the discharge capacity of the second volume adjustable hydraulic pump according to the comparison value of the current rotating speed of generator and generator rated speed, thereby change it and be applied to moment on the generator shaft, thereby generator speed is adjusted to the generator rated speed, to realize the generator constant speed control.
Adopt the present invention to have following beneficial effect:
1, adopts hydraulic transmission, abandoned the use of gear-box, fundamentally avoided the ocean current energy generator fault brought by the gear-box fatigue failure, improved system's reliability of operation.
2, drive the main shaft rotation of generator by hydraulic system, generator need not to be connected with electrical network, so the present invention can solve local electrical problem from network operation on the island or remote districts, saves the cost that large electrical network is transmitted electricity toward these regional laying-outs.
3, realize the control of impeller maximum energy capture and generator constant speed control, improved the efficient of system.
4, variable hydraulic motor and the second volume adjustable hydraulic pump form the oil circulation loop, and can pulsing by absorption system in this oil circulation loop, reduces rigid impulse, make system keep stable.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the schematic diagram of embodiment of the invention ocean current energy generator.
Fig. 2 is embodiment of the invention impeller output power-rotation speed relation curve under different in flow rate.
Fig. 3 is the variable speed constant frequency control method schematic diagram of embodiment of the invention ocean current energy generator.
Drawing reference numeral: 1-impeller; 2-the first volume adjustable hydraulic pump; 3-the first one-way valve; The 4-stop valve; The 5-accumulator; The 6-relief valve; 7-the second one-way valve; 8-the second volume adjustable hydraulic pump; The 9-variable hydraulic motor; The 10-generator; The 11-load; The 12-controller; The 13-fuel tank; The 14-flow transducer; 15-the first speed probe; The 19-pressure transducer; 20-the second speed probe.
Embodiment
Below in conjunction with accompanying drawing invention is described further.
1, ocean current energy generator
As shown in Figure 1, ocean current energy generator, comprise the impeller 1 that is promoted rotation by ocean current, the first volume adjustable hydraulic pump 2 that is directly driven by impeller 1, the entrance of the first volume adjustable hydraulic pump 2 connects fuel tank 13, the outlet of the first volume adjustable hydraulic pump 2 is through the entrance of the first one-way valve 3 link variable oil hydraulic motors 9, the outlet of variable hydraulic motor 9 connects fuel tank 13, variable hydraulic motor 9 has the first output shaft and the second output shaft, the main shaft of described the first output shaft connecting engine 10, the output terminal of this generator 10 connects load 11, described the second output shaft connects the main shaft of the second volume adjustable hydraulic pump 8, the entrance connected tank 13 of the second volume adjustable hydraulic pump 8, the outlet of the second volume adjustable hydraulic pump 8 connects the entrance of variable hydraulic motor 9 through the second one-way valve 7, the second volume adjustable hydraulic pump 8 consists of the oil circulation loop with variable hydraulic motor 9, this oil circulation loop with the stored energy of part fluctuation in the fluid of circulation, thereby reach the effect of absorption system pulsation; The flow transducer 14 of measuring the ocean current flow velocity is equipped with at described impeller 1 place, on impeller 1 and the main shaft that the first volume adjustable hydraulic pump 2 is connected the first speed probe 15 is housed, on the hydraulic pipe line of variable hydraulic motor 9 entrances pressure transducer 19 is housed, the second speed probe 20 is housed on the main shaft of generator 10, described flow transducer 14, the first speed probe 15, pressure transducer 19, the signal that the second speed probe 20 gathers all is transferred to controller 12, and controller 12 sends the displacement control signal of the first volume adjustable hydraulic pump, the displacement control signal of the second volume adjustable hydraulic pump, and the displacement control signal of variable hydraulic motor.
Be connected with accumulator 5 through stop valve 4 on the entrance pipe of described variable hydraulic motor 9.Accumulator 5 can the absorption system medium frequency near the pulsation of accumulator natural angular frequency, make hydraulic system keep stable.
Be connected with relief valve 6 on the entrance pipe of described variable hydraulic motor 0.Can initialization system pressure by relief valve 6, when system pressure is too high, can pass through relief valve release portion hydraulic oil, make the system pressure value maintain the setting oil pressure relief value of relief valve, avoid that system pressure is too high to cause damage to system.
2, the working principle of ocean current energy generator:
The rotating speed of impeller 1 depends on countertorque suffered when ocean current is applied to the torque on the impeller 1 and drags the first volume adjustable hydraulic pump 2, flow transducer 14 is transferred to controller 12 with current flow velocity signal, controller 12 obtains the best wheel speed that will realize that the impeller maximum energy capture is required according to current ocean current flow relocity calculation, controller 12 detects current wheel speed by the first speed probe 15 and compares with best wheel speed, controller 12 is controlled the discharge capacity of the first volume adjustable hydraulic pump 2 according to the comparison value of current wheel speed and best wheel speed, thereby change it and be applied to countertorque on impeller 1 main shaft, thereby wheel speed is adjusted to best wheel speed, to realize the control of impeller maximum energy capture.
Pressure transducer 19 is transferred to controller 12 with the system's current pressure signal that collects, controller 12 compares system's current pressure and predefined force value, calculate the required discharge capacity of variable hydraulic motor 9 according to its difference, thereby the discharge capacity regulating system pressure of controller 12 controlled variable oil hydraulic motors 9 is to predefined value; The current generator speed signal that the second speed probe 20 will collect is transferred to controller 12, controller 12 compares the current rotating speed of generator and generator rated speed, controller 12 is controlled the discharge capacity of the second volume adjustable hydraulic pump 8 according to the comparison value of the current rotating speed of generator and generator rated speed, thereby change it and be applied to moment on generator 10 main shafts, thereby generator speed is adjusted to the generator rated speed, to realize the generator constant speed control.
In addition, because the main shaft of generator is by the hydraulic system driven rotary, generator need not to be connected with electrical network, so the present invention can be from network operation on the island or remote districts, solve local electrical problem, save large electrical network toward the cost of these regional laying-out transmissions of electricity.
3, the controlling method of ocean current energy generator
1) impeller maximum energy capture control
In the horizontal axial type ocean current energy generator, the power that impeller is caught from seawater is:
Wherein, ρ is density of sea water, and S is the sectional area of sweeping of impeller, and v is the ocean current flow velocity, C
PBe the power factor of impeller, P is the output power of impeller.
Be illustrated in figure 2 as different ocean current flow velocitys (such as v
1-v
4) under impeller 1 output power P and wheel speed ω
BRelation curve, corresponding each ocean current flow velocity has a maximum power point (such as A
1-A
4), the maximum power point that connects these curves can obtain the peak output curve L of impeller 1.
On each point of peak output curve, the variation of impeller 1 output power is zero with respect to the variance ratio of wheel speed, at this moment, and the ocean current energy generator Maximum Power Output, that is:
As shown in Figure 2, with wheel speed ω
BBe adjusted to a certain particular value, can realize that impeller 1 catches the maximization of power.In order to realize this goal, the present invention is by regulating the discharge capacity D of the first volume adjustable hydraulic pump 2
OptChange the Hydraulic Power Transmission System load characteristic, and then regulate wheel speed ω
BFollow the tracks of optimum speed ω
OptThereby, so that impeller 1 is realized maximum energy capture.
Formula (3) is the torque balance equation of impeller 1 main shaft,
T
P=D
P1P
P(4)
Wherein, T is the impeller torque, T
fBe Coulomb friction moment, B
P1Be viscous damping coefficient, ω
BBe wheel speed, T
PBe the anti-torque of the first volume adjustable hydraulic pump, J
tFor converting the equivalent moment of inertia on the impeller spindle, t is the time, D
P1Be the discharge capacity of the first volume adjustable hydraulic pump, p
pIt is the outlet pressure of the first volume adjustable hydraulic pump 2.
Can find out from formula (3), (4), by regulating the discharge capacity D of the first volume adjustable hydraulic pump 2
P1, can change the first volume adjustable hydraulic pump 2 and act on anti-torque T on impeller 1 main shaft
PThereby, can regulate wheel speed ω
B, make it operate in best wheel speed ω
Opt, reach the maximum energy capture control of impeller 1.
2) generator constant speed control
Present embodiment with the first output shaft of variable hydraulic motor 9 be connected with generator 10, the second output shaft of variable hydraulic motor 9 is connected with the main shaft of the second volume adjustable hydraulic pump 8, to realize the constant speed control of generator 10, the torque equation on the second volume adjustable hydraulic pump 8, variable hydraulic motor 9 and generator 10 main shafts is:
Wherein, D
MBe the discharge capacity of variable hydraulic motor 9, D
P2Be the discharge capacity of the second volume adjustable hydraulic pump 8, P
MBe the inlet pressure of variable hydraulic motor 9, T
LBe the equivalent load of generator 10, B
P2Be viscous damping coefficient, ω
MBe generator 10 spindle speed, J
MFor converting the equivalent moment of inertia on the main shaft, t is the time.
When generator speed is constant, namely
Have following equation to set up according to formula (5):
(D
M-D
P2)P
M-T
L=B
P2ω
M(6)
Conversely, the discharge capacity of controlled variable oil hydraulic motor 9 and the second volume adjustable hydraulic pump 8 is set up formula (6), can control generator 10 invariablenes turning speeds.Equivalent load T when generator
LChange or the inlet pressure P of variable hydraulic motor 9
MDuring fluctuation, the discharge capacity that can calculate variable hydraulic motor 9 and the second volume adjustable hydraulic pump 8 according to formula (6) is poor:
Therefore the discharge capacity of Moderator Variable oil hydraulic motor 9 and the second volume adjustable hydraulic pump 8 makes its difference be (D respectively
M-D
P2), it is constant that rotating speed that just can regulator generator keeps.
Comprehensive 1), 2) 2 points, impeller maximum energy capture, generator constant speed control strategy that the present embodiment ocean current energy generator adopts can represent with schematic diagram shown in Figure 3.
Among Fig. 3, the energy capture characteristic of impeller 1, generator rated speed ω
RAnd system design temperature P
0All known and be set in the controller 12, controller 12 has 4 road input signals, respectively from flow transducer 14, the first speed probe 15, pressure transducer 19 and the second speed probe 20, controller 12 has 3 tunnel output signals, control respectively the discharge capacity of the first volume adjustable hydraulic pump 2, the second volume adjustable hydraulic pump 8 and variable hydraulic motor 9, controller 12 obtains best wheel speed ω according to the ocean current flow velocity v that collects and the energy capture property calculation of impeller 1
Opt, more best wheel speed ω
OptThe wheel speed ω that feeds back with the first speed probe 15
BCalculate the required discharge capacity of the first volume adjustable hydraulic pump 2 according to its deviation, controller changes the discharge capacity of the first volume adjustable hydraulic pump 2 by becoming discharge capacity actuator, and then change it and be applied to countertorque on the impeller spindle, indirectly regulate the rotating speed of impeller 1, until it reaches best wheel speed, thereby realize the control of impeller maximum energy capture; Controller 12 is with rated engine speed ω
RThe generator speed ω that feeds back with the second speed probe 20
MCompare, obtain the rotating speed deviation, with system design temperature P
0The inlet pressure P of the variable hydraulic motor 9 that feeds back with pressure transducer 19
MCompare, obtain pressure divergence, controller 12 calculates the discharge capacity D of variable hydraulic motor 9 according to these two deviations
MDischarge capacity D with the second volume adjustable hydraulic pump 8
P2, formula (6) is set up all the time, and made system pressure keep stable, namely realize the generator constant speed control, and system is without impact.
Above-described embodiment only is enumerating of the technology of the present invention design way of realization; protection scope of the present invention is not limited only to above-described embodiment, and protection scope of the present invention may extend to those skilled in the art according to the thinkable equivalent technologies means of technical conceive of the present invention.
Claims (4)
1. ocean current energy generator, it is characterized in that: comprise the impeller (1) that is promoted rotation by ocean current, the first volume adjustable hydraulic pump (2) that is directly driven by impeller (1), the entrance of the first volume adjustable hydraulic pump (2) connects fuel tank (13), the outlet of the first volume adjustable hydraulic pump (2) is through the entrance of the first one-way valve (3) link variable oil hydraulic motor (9), the outlet of variable hydraulic motor (9) connects fuel tank (13), variable hydraulic motor (9) has the first output shaft and the second output shaft, the main shaft of described the first output shaft connecting engine (10), the output terminal of this generator (10) connects load (11), described the second output shaft connects the main shaft of the second volume adjustable hydraulic pump (8), the entrance connected tank (13) of the second volume adjustable hydraulic pump (8), the outlet of the second volume adjustable hydraulic pump (8) connects the entrance of variable hydraulic motor (9) through the second one-way valve (7), the second volume adjustable hydraulic pump (8) with variable hydraulic motor (9) but consist of the oil circulation loop of absorption system pulsation; Described impeller (1) locates to be equipped with the flow transducer (14) of measuring the ocean current flow velocity, on impeller (1) and the main shaft that the first volume adjustable hydraulic pump (2) is connected the first speed probe (15) is housed, on the hydraulic pipe line of variable hydraulic motor (9) entrance pressure transducer (19) is housed, the second speed probe (20) is housed on the main shaft of generator (10), described flow transducer (14), the first speed probe (15), pressure transducer (19), the signal that the second speed probe (20) gathers all is transferred to controller (12), and controller (12) sends the displacement control signal of the first volume adjustable hydraulic pump, the displacement control signal of the second volume adjustable hydraulic pump, and the displacement control signal of variable hydraulic motor.
2. ocean current energy generator as claimed in claim 1 is characterized in that: be connected with accumulator (5) through stop valve (4) on the entrance pipe of described variable hydraulic motor (9).
3. ocean current energy generator as claimed in claim 1 or 2 is characterized in that: be connected with relief valve (6) on the entrance pipe of described variable hydraulic motor (9).
4. control the as claimed in claim 1 method of ocean current energy generator, it is characterized in that:
1) rotating speed of impeller (1) depends on countertorque suffered when ocean current is applied to the torque on the impeller (1) and drags the first volume adjustable hydraulic pump (2), described flow transducer (14) is transferred to controller (12) with current flow velocity signal, controller (12) obtains the best wheel speed that will realize that the impeller maximum energy capture is required according to current ocean current flow relocity calculation, controller (12) detects current wheel speed by the first speed probe (15) and compares with best wheel speed, controller (12) is controlled the discharge capacity of the first volume adjustable hydraulic pump (2) according to the comparison value of current wheel speed and best wheel speed, thereby change it and be applied to countertorque on impeller (1) main shaft, thereby wheel speed is adjusted to best wheel speed, to realize the control of impeller maximum energy capture;
2) pressure transducer (19) is transferred to controller (12) with the system's current pressure signal that collects, controller (12) compares system's current pressure and predefined force value, calculate the required discharge capacity of variable hydraulic motor (9) according to its difference, controller (12) controlled variable oil hydraulic motor (9) thus discharge capacity regulating system pressure to predefined value; The current generator speed signal that the second speed probe (20) will collect is transferred to controller (12), controller (12) compares the current rotating speed of generator and generator rated speed, controller (12) is controlled the discharge capacity of the second volume adjustable hydraulic pump (8) according to the comparison value of the current rotating speed of generator and generator rated speed, thereby change it and be applied to moment on generator (10) main shaft, thereby generator speed is adjusted to the generator rated speed, to realize the generator constant speed control.
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| CN201310007287.6A CN103047075B (en) | 2013-01-08 | 2013-01-08 | Ocean current energy power generation device and control method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438186A (en) * | 2016-12-26 | 2017-02-22 | 江苏海事职业技术学院 | Vertical shaft tidal current energy power generation device based on tidal current shear-line characteristics |
| CN106687685A (en) * | 2014-09-12 | 2017-05-17 | 三菱重工业株式会社 | Method for starting ocean current power generation device and start control device |
| CN108331704A (en) * | 2018-02-13 | 2018-07-27 | 佛山科学技术学院 | A kind of horizontally-opposed twin turbines hydraulic drive type energy by ocean current electricity generation system |
| CN108915942A (en) * | 2018-07-16 | 2018-11-30 | 山东大学 | A kind of energy storage type hydraulic Wave energy generating system and its working method |
| CN109253040A (en) * | 2018-11-13 | 2019-01-22 | 大连海事大学 | A kind of high efficiency raft formula wave energy generating set |
| CN113056853A (en) * | 2018-11-16 | 2021-06-29 | 西门子能源全球有限两合公司 | Energy supply system for a wading installation |
| CN113389764A (en) * | 2021-06-30 | 2021-09-14 | 四川航天烽火伺服控制技术有限公司 | Hydraulic equipment and turbo pump outlet pressure control system thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106687685A (en) * | 2014-09-12 | 2017-05-17 | 三菱重工业株式会社 | Method for starting ocean current power generation device and start control device |
| CN106687685B (en) * | 2014-09-12 | 2019-02-05 | 三菱重工业株式会社 | The starting method of power generation device from sea current and start-control device |
| CN106438186A (en) * | 2016-12-26 | 2017-02-22 | 江苏海事职业技术学院 | Vertical shaft tidal current energy power generation device based on tidal current shear-line characteristics |
| CN108331704A (en) * | 2018-02-13 | 2018-07-27 | 佛山科学技术学院 | A kind of horizontally-opposed twin turbines hydraulic drive type energy by ocean current electricity generation system |
| CN108331704B (en) * | 2018-02-13 | 2023-12-26 | 佛山科学技术学院 | Horizontal opposite double-turbine hydraulic transmission type ocean current energy power generation system |
| CN108915942A (en) * | 2018-07-16 | 2018-11-30 | 山东大学 | A kind of energy storage type hydraulic Wave energy generating system and its working method |
| CN109253040A (en) * | 2018-11-13 | 2019-01-22 | 大连海事大学 | A kind of high efficiency raft formula wave energy generating set |
| CN113056853A (en) * | 2018-11-16 | 2021-06-29 | 西门子能源全球有限两合公司 | Energy supply system for a wading installation |
| CN113056853B (en) * | 2018-11-16 | 2024-01-23 | 西门子能源全球有限两合公司 | Energy supply system for wading facilities |
| CN113389764A (en) * | 2021-06-30 | 2021-09-14 | 四川航天烽火伺服控制技术有限公司 | Hydraulic equipment and turbo pump outlet pressure control system thereof |
| CN113389764B (en) * | 2021-06-30 | 2022-11-15 | 四川航天烽火伺服控制技术有限公司 | Hydraulic equipment and turbo pump outlet pressure control system thereof |
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