CN114278488A - Hydraulic power generation system of wave power generation device - Google Patents
Hydraulic power generation system of wave power generation device Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- 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
Abstract
The invention discloses a hydraulic power generation system of a wave energy power generation device, which is characterized in that a hydraulic pressure sensor is used for acquiring a hydraulic pressure signal of an accumulator group and transmitting the hydraulic pressure signal to a hydraulic power generation master controller, and a voltage/current transformer is used for acquiring a voltage/current signal of a direct current bus and transmitting the voltage/current signal to the hydraulic power generation master controller, so that the hydraulic power generation master controller controls a hydraulic power generation branch according to the acquired hydraulic pressure signal of the accumulator group and the voltage/current signal of the direct current bus. The hydraulic power generation system of the wave energy power generation device improves the stability and controllability of the electric energy output of the wave energy power generation device by matching different hydraulic power generation branches and control strategies while considering the reliability of the power generation system.
Description
Technical Field
The invention relates to the technical field of wave energy power generation, in particular to a hydraulic power generation system of a wave energy power generation device.
Background
Wave energy is an inexhaustible ocean green energy source, which is composed of kinetic energy generated by the wave motion on the ocean surface and generated by the particle motion in the fluctuating water and potential energy of the vertical displacement of the wave surface relative to the average water surface.
The waves are periodic motion with strong intermittence and instability, and if the wave energy is directly utilized for power generation, the generated electric energy has strong fluctuation, and the electric energy quality is not ideal. Therefore, in the middle process of realizing the wave energy-electric energy conversion, a buffering link is usually arranged, such as a hydraulic energy storage mode and the like. In a wave energy power generation system adopting a wave energy-hydraulic energy-electric energy conversion link, an uncontrollable rectification mode is usually adopted in an electric energy conversion link in order to ensure the reliability of the power generation system in a real sea condition environment, so that the output stability and controllability are not ideal, and the grid-connected operation performance needs to be improved.
Disclosure of Invention
The invention provides a hydraulic power generation system of a wave energy power generation device, which is used for improving the stability and controllability of the electric energy output of the wave energy power generation device and giving consideration to the reliability of the power generation system.
The invention provides a hydraulic power generation system of a wave energy power generation device, which consists of two subsystems; the subsystem consists of a front end, a middle end and a rear end; the middle end is connected with the front end through a hydraulic pipeline; the rear end is connected with the middle end through a direct current bus; a voltage/current transformer is connected to the direct current bus; the two subsystems are symmetrically arranged and connected to a hydraulic pipeline of the subsystem through a gate valve, and are communicated through a direct current bus connected to the subsystem through a solid switch.
The front end comprises: the hydraulic pressure sensor and the accumulator group are connected with the hydraulic pipeline and the hydraulic pressure sensor;
the middle end comprises: a plurality of hydro-electric conversion units; the hydraulic-electric conversion unit comprises a plurality of hydraulic power generation branches; the plurality of hydraulic power generation branches are controlled by a hydraulic conversion controller; the hydraulic-electric conversion unit, the hydraulic pressure sensor and the voltage/current transformer are all connected with a hydraulic power generation master controller;
the rear end is used for transmitting electric energy generated by the target hydraulic power generation system to the internet and ensuring that the direct-current bus voltage of the target hydraulic power generation system is within a preset voltage range.
Optionally, the number of the hydraulic power generation branches in the hydro-electric conversion unit is 3.
Optionally, the first hydraulic power generation branch comprises: the first electromagnetic valve, the first quantitative hydraulic motor, the first permanent magnet synchronous generator and the first full-control rectifier are connected in sequence.
Optionally, the second hydraulic power generation branch includes: the second electromagnetic proportional speed regulating valve, the second variable hydraulic motor, the second permanent magnet synchronous generator and the second uncontrollable rectifier are connected in sequence.
Optionally, the third hydraulic power generation branch comprises: and the third electromagnetic valve, the third quantitative hydraulic motor, the third permanent magnet synchronous generator and the third uncontrollable rectifier are connected in sequence.
Optionally, energy consumption resistance modules are connected between the first permanent magnet synchronous generator and the first fully-controlled rectifier, between the second permanent magnet synchronous generator and the second uncontrollable rectifier, and between the third permanent magnet synchronous generator and the third uncontrollable rectifier.
Optionally, the energy consuming resistor module comprises: a switch and a power consumption resistor.
Optionally, the rear end includes an inverter and an energy consuming module respectively connected to the dc bus.
Optionally, the energy consuming module comprises: the direct current bus is connected with the energy dissipation resistor.
Optionally, a ratio of the rated power of the permanent magnet synchronous generator of the first hydraulic power generation branch, the rated power of the permanent magnet synchronous generator of the second hydraulic power generation branch, and the rated power of the permanent magnet synchronous generator of the third hydraulic power generation branch satisfies 3: 2: 1.
according to the technical scheme, the invention has the following advantages:
the invention discloses a hydraulic power generation system of a wave energy power generation device, which consists of two subsystems; the subsystem consists of a front end, a middle end and a rear end; the middle end is connected with the front end through a hydraulic pipeline; the rear end is connected with the middle end through a direct current bus; a voltage/current transformer is connected to the direct current bus; the two subsystems are symmetrically arranged, are connected to a hydraulic pipeline of the subsystem through a gate valve, and are communicated through a direct current bus connected to the subsystem through a solid switch; the front end comprises: the hydraulic pressure sensor and the accumulator group are connected with the hydraulic pipeline and the hydraulic pressure sensor; the middle end comprises: a plurality of hydro-electric conversion units; the hydraulic-electric conversion unit comprises a plurality of hydraulic power generation branches; the plurality of hydraulic power generation branches are controlled by a hydraulic conversion controller; the hydraulic-electric conversion unit, the hydraulic pressure sensor and the voltage/current transformer are all connected with a hydraulic power generation master controller; the rear end is used for transmitting electric energy generated by the target hydraulic power generation system to the internet and ensuring that the direct-current bus voltage of the target hydraulic power generation system is within a preset voltage range.
The hydraulic pressure signal of the accumulator group is collected through the hydraulic pressure sensor and transmitted to the hydraulic power generation master controller, the voltage/current transformer collects the voltage/current signal of the direct current bus and transmits the voltage/current signal to the hydraulic power generation master controller, and therefore the hydraulic power generation master controller controls the hydraulic-electric conversion unit according to the collected hydraulic pressure signal of the accumulator group and the collected voltage/current signal of the direct current bus. The hydraulic power generation system of the wave energy power generation device improves the stability and controllability of the electric energy output of the wave energy power generation device by matching different hydraulic power generation branches and control strategies while considering the reliability of the power generation system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a hydraulic power generation system of a wave energy power generation device according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a hydro-electric conversion unit of an embodiment of a hydraulic power generation system of a wave energy power generation device.
In the figure: 1. a gate valve; 2. a hydraulic power generation main controller; 3. a solid state switch; 4(a/b), a voltage/current transformer; 51. a first solenoid valve; 52. a second electromagnetic proportional speed regulating valve; 53. a third electromagnetic valve; 61. a first quantity hydraulic motor; 62. a second variable displacement hydraulic motor; 63. a third fixed displacement hydraulic motor; 71. a first permanent magnet synchronous generator; 72. a second permanent magnet synchronous generator; 73. a third permanent magnet synchronous generator; 81. a first energy dissipating resistance module; 82. a second dissipative resistance module; 83. a third energy consuming resistor module; 92. a second uncontrollable rectifier; 93. a third uncontrollable rectifier; 101. a first fully controlled rectifier; 111. a hydraulic pressure conversion controller; 11(a/b), an accumulator group; 12(a/b), a hydraulic pressure sensor; 21(a/b), a first hydro-electric conversion unit; 22(a/b), a second liquid-to-electricity conversion unit; 2n (a/b), nth hydro-electric conversion unit; 31(a/b), an inverter; 32(a/b), a chopper; 33(a/b), a dissipation resistance; a. a hydraulic line; b a direct current bus.
Detailed Description
The embodiment of the invention provides a hydraulic power generation system of a wave energy power generation device, which is used for improving the stability and controllability of electric energy output of the wave energy power generation device and giving consideration to the reliability of the power generation system.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, which is a schematic structural diagram of an embodiment of a hydraulic power generation system of a wave energy power generation device, the hydraulic power generation system of the wave energy power generation device is composed of two subsystems; the subsystem consists of a front end, a middle end and a rear end; the middle end is connected with the front end through a hydraulic pipeline a; the rear end is connected with the middle end through a direct current bus b; the direct current bus b is connected with a voltage/current transformer 4; the two subsystems are symmetrically arranged and connected to a hydraulic pipeline a of the subsystem through a gate valve 1, and connected to a direct current bus b of the subsystem through a solid-state switch 3 to achieve communication of the two subsystems.
The front end comprises: a hydraulic pressure sensor 11, and an accumulator group 12 connected to the hydraulic line a and the hydraulic pressure sensor 11.
The middle end comprises: a plurality of hydro-electric conversion units; the hydraulic-electric conversion unit comprises a plurality of hydraulic power generation branches; the plurality of hydraulic power generation branches are controlled by a hydraulic conversion controller 111; the hydro-electric conversion unit, the hydraulic pressure sensor 11 and the voltage/current transformer 4 are all connected with a hydraulic power generation master controller 2.
The rear end is used for transmitting electric energy generated by the target hydraulic power generation system to the internet and ensuring that the direct-current bus voltage of the target hydraulic power generation system is within a preset voltage range.
In the embodiment of the present invention, the hydraulic power generation system of the wave power generation device is composed of two subsystems, and the subsystems are composed of key components such as an accumulator group 12, a hydraulic pressure sensor 11, a hydraulic pipeline a, a gate valve 1, a plurality of hydraulic power generation branches mounted on a hydro-electric conversion unit (including a first hydro-electric conversion unit 21a and a first hydro-electric conversion unit 21b, a second hydro-electric conversion unit 22a and second hydro-electric conversion units 22b and … …, an nth hydro-electric conversion unit 2na and an nth hydro-electric conversion unit 2nb), a direct current bus b, a solid-state switch 3, a voltage/current transformer 4, a hydraulic power generation master controller 2, and the like. The two subsystems are symmetrically arranged, the hydraulic pipelines a of the two subsystems are communicated through the gate valve 1, and the gate valve 1 is closed normally, so that the two subsystems are kept to operate independently.
In the specific implementation, the hydraulic pressure sensor 11 collects a hydraulic pressure signal of the accumulator group 12 and transmits the hydraulic pressure signal to the hydraulic power generation master controller 2, the voltage/current transformer 4 collects a voltage/current signal of the direct current bus b and transmits the voltage/current signal to the hydraulic power generation master controller 2, and the hydraulic power generation master controller 2 controls the hydraulic-electric conversion unit according to the collected hydraulic pressure signal of the accumulator group 12 and the voltage/current signal of the direct current bus b. Meanwhile, the two subsystems can be interconnected through the solid-state switch 3 between the respective direct current buses b.
Further, the number of the hydraulic power generation branches in the hydro-electric conversion unit in the embodiment of the invention is 3.
Referring to fig. 2, which is a schematic structural diagram of a hydraulic power generation branch of an embodiment of a hydraulic power generation system of a wave energy power generation device, a first hydraulic power generation branch includes: the first electromagnetic valve 51, the first constant hydraulic motor 61, the first permanent magnet synchronous generator 71 and the first full-control rectifier 101 are connected in sequence.
Referring to fig. 2, in particular, the second hydraulic power generation branch includes: the second electromagnetic proportional speed regulating valve 52, the second variable hydraulic motor 62, the second permanent magnet synchronous generator 72 and the second uncontrollable rectifier 92 are connected in sequence.
Referring to fig. 2, specifically, the third hydraulic power generation branch includes: a third electromagnetic valve 53, a third quantitative hydraulic motor 63, a third permanent magnet synchronous generator 73 and a third uncontrollable rectifier 93 which are connected in sequence.
It should be noted that, by adopting the cooperation of the fully-controlled rectifier and the uncontrollable rectifier, that is, including the cooperation of different electric energy conversion topologies and control strategies, the stability and controllability of the electric energy output of the wave energy power generation device can be effectively improved, and the reliability of the power generation system can be considered.
Referring to fig. 2, energy consumption resistance modules are connected between the first permanent magnet synchronous generator 71 and the first fully controlled rectifier 101, between the second permanent magnet synchronous generator 72 and the uncontrollable rectifier 92, and between the third permanent magnet synchronous generator 73 and the uncontrollable rectifier 93.
Specifically, the energy consumption resistance module includes a first energy consumption resistance module 81 between the first permanent magnet synchronous generator 71 and the first fully controlled rectifier 101; a second dissipative resistance module 82 between a second said permanent magnet synchronous generator 72 and said uncontrollable rectifier 92; an energy consumption resistance module 83 is connected between the third permanent magnet synchronous generator 73 and the uncontrollable rectifier 93.
In the embodiment of the present invention, the first hydraulic power generation branch consists of a first electromagnetic valve 51, a first quantitative hydraulic motor 61, a first permanent magnet synchronous generator 71 and a first full-control rectifier 101, the second hydraulic power generation branch consists of a second electromagnetic proportional speed regulating valve 52, a second variable hydraulic motor 62, a second permanent magnet synchronous generator 72 and a second uncontrollable rectifier 92, the third hydraulic power generation branch consists of a third electromagnetic valve 53, a third quantitative hydraulic motor 63, a third permanent magnet synchronous generator 73 and a third uncontrollable rectifier 93, and an energy consumption resistance module is arranged at an outlet of each permanent magnet synchronous generator and includes a change-over switch and an energy consumption resistance to realize self-consumption of electric energy in a non-grid-connected mode, thereby realizing self-protection of the hydraulic power generation branch. Meanwhile, hydraulic power generation branches of the same subsystem are connected to the same direct current bus b.
Referring to fig. 2, the rear end includes an inverter 31 and an energy consumption module respectively connected to the dc bus b.
In the embodiment of the invention, the inverter 31 and the energy consumption module connected with the direct current bus b are arranged at the rear end, and electric energy transmission and internet surfing can be realized through the inverter 31.
Referring to fig. 2, the energy consumption module includes: a chopper 32 connected to the dc bus b, and a dissipation resistor 33 connected to the chopper 32.
In the embodiment of the invention, the chopper 32 is configured on the direct current bus b and connected with the energy consumption resistor 33, and when transient overvoltage occurs on the direct current bus b, energy is consumed through the energy consumption resistor 33, so that the direct current bus voltage is ensured to operate within a normal voltage range.
In the embodiment of the present invention, the ratio of the rated power of the first permanent magnet synchronous generator 71 of the first hydraulic power generation branch, the rated power of the second permanent magnet synchronous generator 72 of the second hydraulic power generation branch, and the rated power of the third permanent magnet synchronous generator 73 of the third hydraulic power generation branch satisfies 3: 2: 1.
in the embodiment of the invention, the rated power of the permanent magnet synchronous generators 71-73 in the first hydraulic power generation branch, the second hydraulic power generation branch and the third hydraulic power generation branch is 150kW, 100kW and 50kW respectively; and other parts of the corresponding hydraulic power generation branch circuits are selected according to the rated power of the corresponding permanent magnet synchronous generator.
In the concrete implementation, taking the subsystem located above as an example, under the normal working condition, the target hydraulic power generation system converts wave energy into hydraulic energy, and the hydraulic energy is stored in the accumulator group 12 a. The accumulator group 12a is provided with a hydraulic pressure sensor 11a, when the hydraulic pressure in the accumulator group 12a reaches a set threshold value, the hydraulic power generation master controller 2 issues a starting instruction to the power generation unit controller of the first hydro-electric conversion unit 21a, and the first electromagnetic valve 51 is opened to realize the hydraulic power generation process, that is, in one energy storage and power generation period, the first hydro-electric conversion unit 21a of any subsystem is triggered, then the first hydraulic power generation branch of the first hydro-electric conversion unit 21a is connected, and meanwhile, the inverter 31a maintains the stability of the direct current voltage and converts the direct current into the power frequency alternating current to transmit the electric energy to the internet. Within the regulation range of the fully controlled rectifier 101 of the first hydraulic power generation branch, a smooth regulation of the electrical power can be achieved. Under the condition of small waves, the pressure of the energy accumulator group 12a is continuously reduced, the current value of the first full-control rectifier 101 is gradually reduced under the condition that the direct-current voltage is stable, when the hydraulic value is reduced to the lower limit value, the first electromagnetic valve 51 is closed, the first full-control rectifier 101 is switched to the standby state, and the next energy accumulation and power generation link is waited. In the middle wave condition, the stored energy pressure continuously rises, the power output of the first fully controlled rectifier 101 also continuously rises, and when the rated power reaches 90%, the controller of the first hydro-electric conversion unit 21a starts the second electromagnetic proportional speed regulating valve 52 of the second hydraulic power generation branch. Because the hydraulic oil pushes the first quantitative hydraulic motor 61 to rotate, and the first quantitative hydraulic motor 61 drives the first permanent magnet synchronous generator 71 again, which is a mechanical process, the rotating speed and the output power of the first permanent magnet synchronous generator 71 have an acceleration process of one second level, and under the millisecond response action of the first fully controlled rectifier 101, the first fully controlled rectifier 101 reduces the power output accordingly, so that the power fluctuation caused by the second hydraulic power generation branch circuit is smoothed. If the power of the wave energy input end is gradually reduced at this time, the pressure of the accumulator group 12a is also continuously reduced, when the pressure is reduced to the closing value of the second electromagnetic proportional speed regulating valve 52 of the hydraulic second hydraulic power generation branch, the second electromagnetic proportional speed regulating valve 52 is closed, and the second quantitative hydraulic motor 62 gradually stops rotating. This is an inertial process, so that the drop in power of the second permanent magnet synchronous generator 72 to zero is a one second process, so that in this process, with a rapid response in the order of milliseconds, the first fully controlled rectifier 101 gradually increases its power output, thereby smoothing out the power fluctuations caused by switching out the second hydraulic power generation branch. Under the condition of heavy waves, the first hydraulic power generation branch and the second hydraulic power generation branch are put into operation in succession, the energy storage pressure continuously rises at the moment, the power output of the first fully-controlled rectifier 101 also continuously rises, when the rated power of the first fully-controlled rectifier reaches 90%, the third electromagnetic valve 53 of the third hydraulic power generation branch is started, and in the process, the first fully-controlled rectifier 101 correspondingly reduces the power output of the first fully-controlled rectifier through millisecond-level quick response to smooth power fluctuation caused by the input of the third hydraulic power generation branch. After all the hydraulic power generation branch systems of the first hydro-electric conversion unit 21a are put into operation, if the stored energy pressure is further increased, the 3 hydraulic power generation branches of the second hydro-electric conversion unit 22a are started, and the switching is performed in the same manner.
In one hydraulic power generation unit, when the first fully-controlled rectifier 101 cannot work normally due to a fault or the like, the second hydraulic power generation branch and the third hydraulic power generation branch which comprise an uncontrollable rectification link are put into use, so that the necessary electric energy supply of a target hydraulic power generation system can be ensured, and the reliability of the power generation system is improved. Meanwhile, the combination of the electromagnetic proportional speed regulating valve and the variable hydraulic motor has good power generation regulation and control performance.
When the first hydraulic power generation branch and the second hydraulic power generation branch cannot work normally, the third hydraulic power generation branch which is simplest in system configuration and relatively highest in reliability is directly input, and therefore necessary electric energy supply of a target hydraulic power generation system can be guaranteed.
Furthermore, two mutually independent, interconnectable subsystems can be used as a backup for each other. When one subsystem breaks down, the other subsystem can normally operate, necessary electric energy supply on the wave energy power generation device is ensured, and the reliability of the power generation system is improved.
In the embodiment of the invention, the hydraulic power generation system of the wave power generation device consists of two subsystems; the subsystem consists of a front end, a middle end and a rear end; the middle end is connected with the front end through a hydraulic pipeline a; the rear end is connected with the middle end through a direct current bus b; the direct current bus b is connected with a voltage/current transformer 4; the two subsystems are symmetrically arranged and connected to a hydraulic pipeline a of the subsystem through a gate valve 1, and connected to a direct current bus b of the subsystem through a solid-state switch 3 to realize the communication of the two subsystems; the front end comprises: a hydraulic pressure sensor 11, and an accumulator group 12 connected to the hydraulic line a and the hydraulic pressure sensor 11; the middle end comprises: a plurality of hydraulic power generation branches; the plurality of hydraulic power generation branches are controlled by a hydraulic conversion controller 111; the hydraulic power generation branches, the hydraulic pressure sensors 11 and the voltage/current transformers 4 are all connected with a hydraulic power generation master controller 2; the rear end is used for transmitting electric energy generated by the target hydraulic power generation system to the internet and ensuring that the direct-current bus voltage of the target hydraulic power generation system is within a preset voltage range.
The hydraulic pressure signal of the accumulator group is collected through the hydraulic pressure sensor 11 and transmitted to the hydraulic power generation main controller 2, the voltage/current transformer 4 collects the voltage/current signal of the direct current bus and transmits the voltage/current signal to the hydraulic power generation main controller 2, and therefore the hydraulic power generation main controller 2 controls the hydraulic power generation branch according to the collected hydraulic pressure signal of the accumulator group 12 and the voltage/current signal of the direct current bus b. The hydraulic power generation system of the wave energy power generation device improves the stability and controllability of the electric energy output of the wave energy power generation device by matching different hydraulic power generation branches and control strategies while considering the reliability of the power generation system.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A hydraulic power generation system of a wave energy power generation device is characterized by comprising two subsystems; the subsystem consists of a front end, a middle end and a rear end; the middle end is connected with the front end through a hydraulic pipeline; the rear end is connected with the middle end through a direct current bus; a voltage/current transformer is connected to the direct current bus; the two subsystems are symmetrically arranged, are connected to a hydraulic pipeline of the subsystem through a gate valve, and are communicated through a direct current bus connected to the subsystem through a solid switch;
the front end comprises: the hydraulic pressure sensor and the accumulator group are connected with the hydraulic pipeline and the hydraulic pressure sensor;
the middle end comprises: a plurality of hydro-electric conversion units; the hydraulic-electric conversion unit comprises a plurality of hydraulic power generation branches; the plurality of hydraulic power generation branches are controlled by a hydraulic conversion controller; the hydraulic-electric conversion unit, the hydraulic pressure sensor and the voltage/current transformer are all connected with a hydraulic power generation master controller;
the rear end is used for transmitting electric energy generated by the target hydraulic power generation system to the internet and ensuring that the direct-current bus voltage of the target hydraulic power generation system is within a preset voltage range.
2. The wave energy power generation device hydraulic power generation system of claim 1, wherein the number of hydraulic power generation branches in the hydro-electric conversion unit is 3.
3. The wave energy power plant hydraulic power generation system of claim 2, wherein the first hydraulic power generation branch comprises: the first electromagnetic valve, the first quantitative hydraulic motor, the first permanent magnet synchronous generator and the first full-control rectifier are connected in sequence.
4. The wave energy power plant hydraulic power generation system of claim 3, wherein the second hydraulic power generation branch comprises: the second electromagnetic proportional speed regulating valve, the second variable hydraulic motor, the second permanent magnet synchronous generator and the second uncontrollable rectifier are connected in sequence.
5. The wave energy power generation device hydraulic power generation system of claim 4, wherein the third hydraulic power generation branch comprises: and the third electromagnetic valve, the third quantitative hydraulic motor, the third permanent magnet synchronous generator and the third uncontrollable rectifier are connected in sequence.
6. The wave energy power plant hydraulic power generation system of claim 5, wherein energy dissipating resistance modules are connected between the first permanent magnet synchronous generator and the first fully controlled rectifier, the second permanent magnet synchronous generator and the second uncontrollable rectifier, and the third permanent magnet synchronous generator and the third uncontrollable rectifier.
7. The wave energy power plant hydraulic power generation system of claim 6, wherein the energy dissipating resistance module comprises: a switch and a power consumption resistor.
8. The wave energy power plant hydraulic power generation system of claim 5, wherein the aft end includes an inverter and an energy dissipating module respectively connected to the DC bus.
9. The wave energy generation device hydraulic power generation system of claim 8, wherein the energy dissipation module comprises: the direct current bus is connected with the energy dissipation resistor.
10. The wave energy power generation device hydraulic power generation system of claim 4, wherein the ratio of the rated power of the first permanent magnet synchronous generator of the first hydraulic power generation branch, the rated power of the second permanent magnet synchronous generator of the second hydraulic power generation branch and the rated power of the third permanent magnet synchronous generator of the third hydraulic power generation branch satisfies 3: 2: 1.
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| CN202111544568.6A CN114278488B (en) | 2021-12-16 | 2021-12-16 | Hydraulic power generation system of wave energy power generation device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626366A (en) * | 2016-01-26 | 2016-06-01 | 中国船舶重工集团公司第七一〇研究所 | Energy steady output control system applicable to hydraulic wave power generation device |
| US20160290153A1 (en) * | 2015-03-31 | 2016-10-06 | Azbil Corporation | Turbine-type flow rate controlling device |
| CN112483305A (en) * | 2020-11-26 | 2021-03-12 | 广东电科院能源技术有限责任公司 | Electric energy conversion system and control method of wave energy power generation device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160290153A1 (en) * | 2015-03-31 | 2016-10-06 | Azbil Corporation | Turbine-type flow rate controlling device |
| CN105626366A (en) * | 2016-01-26 | 2016-06-01 | 中国船舶重工集团公司第七一〇研究所 | Energy steady output control system applicable to hydraulic wave power generation device |
| CN112483305A (en) * | 2020-11-26 | 2021-03-12 | 广东电科院能源技术有限责任公司 | Electric energy conversion system and control method of wave energy power generation device |
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