CN110768293A - Offshore wind power generation system and control method thereof - Google Patents
Offshore wind power generation system and control method thereof Download PDFInfo
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- CN110768293A CN110768293A CN201911061658.2A CN201911061658A CN110768293A CN 110768293 A CN110768293 A CN 110768293A CN 201911061658 A CN201911061658 A CN 201911061658A CN 110768293 A CN110768293 A CN 110768293A
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- 238000010248 power generation Methods 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004146 energy storage Methods 0.000 claims abstract description 106
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
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- 238000010586 diagram Methods 0.000 description 4
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- 230000007774 longterm Effects 0.000 description 3
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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- 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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- 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
- F03D7/00—Controlling wind motors
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- 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
- F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
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- 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
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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- 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
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
- F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
- H02S10/12—Hybrid wind-PV energy systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- 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
- Y02E10/727—Offshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The embodiment of the invention discloses an offshore wind power generation system and a control method thereof. This offshore wind power generation system includes: the wind generating set is arranged on the fan foundation, a steel structure of the fan foundation is used as a protective cathode and is electrically connected with a negative electrode output end of the rectifier, a grounding body of the fan foundation is used as an auxiliary anode and is electrically connected with a positive electrode output end of the rectifier, and the controller controls the wind generating set, the photovoltaic generating device, the energy storage device and a power grid to output electric energy to the rectifier and controls the rectifier to supply power for the protective cathode and the auxiliary anode. According to the technical scheme of the embodiment of the invention, the steel structure of the fan foundation can be effectively prevented from being corroded, and the safe and stable operation of the offshore wind power generation system in the deep and remote sea areas is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of wind power generation, in particular to an offshore wind power generation system and a control method thereof.
Background
Offshore wind energy is richer and more stable than land wind energy and does not occupy land resources, so the development potential is huge, and the available wind energy storage capacity is about three times of that of land.
At present, the offshore wind power development in China is in a stable development stage, but the offshore wind power development is limited by a plurality of factors such as environment, navigation channel, military and the like, and the development must be oriented to the direction of deep and distant sea areas in the future. Due to the particularity of the geographic position of the offshore wind farm in the deep and far sea areas, the offshore wind farm generally has the characteristics of long distance from the shore, relatively deep water depth of the sea areas and the like.
As the wind power foundation of the offshore wind power generation system needs to be soaked in seawater and is easy to corrode, the anticorrosion method in the prior art is very difficult to implement and maintain for the wind power generation device in the deep and remote sea areas, the construction cost is high, and the reliability of the protection measures is low. In the prior art, a long-term effective and good-economical protection scheme for the foundation of the offshore wind turbine in the deep and remote sea area is lacked, and the safe and stable operation of the offshore wind power generation system is difficult to ensure.
Disclosure of Invention
The embodiment of the invention provides an offshore wind power generation system and a control method thereof, which are used for providing a protection scheme for the offshore wind power generation system in deep and remote sea areas, preventing a steel structure of a fan foundation from being corroded and ensuring the safe and stable operation of the offshore wind power generation system.
In a first aspect, an embodiment of the present invention provides an offshore wind power generation system, including:
the wind generating set, the photovoltaic generating device, the energy storage device, the rectifier and the controller are respectively and electrically connected with an electric energy input end of the rectifier, a control end of the rectifier, the wind generating set, the photovoltaic generating device and the energy storage device are respectively and electrically connected with the controller, an electric energy input end of the rectifier and the controller are respectively and electrically connected with a power grid, and the controller controls the wind generating set, the photovoltaic generating device, the energy storage device and the power grid to output electric energy to the rectifier; and the number of the first and second groups,
the wind turbine generator system comprises a wind turbine foundation, a wind turbine generator set, a rectifier, a controller and a ground body of the wind turbine foundation, wherein the wind turbine generator set is arranged on the wind turbine foundation, a steel structure of the wind turbine foundation is used as a protection cathode and is electrically connected with a negative output end of the rectifier, a ground body of the wind turbine foundation is used as an auxiliary anode and is electrically connected with a positive output end of the rectifier, and the controller controls the rectifier to supply power to the protection cathode and.
Further, the controller is used for controlling the wind generating set and the photovoltaic power generation device to output residual electric quantity to the power grid and the energy storage device when the generating capacity of the wind generating set and the photovoltaic power generation device is larger than the power consumption of the protective cathode and the auxiliary anode;
and when the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, controlling the energy storage device or the power grid to output electric energy to the rectifier.
Further, the controller is used for controlling the wind generating set and the photovoltaic power generation device to output residual electric quantity to the energy storage device when the rectifier or the controller is disconnected with the power grid and if the generated energy of the wind generating set and the photovoltaic power generation device is larger than the power consumption of the protection cathode and the auxiliary anode;
and if the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, controlling the energy storage device to output electric energy to the rectifier.
Further, the controller is also used for controlling the wind generating set and the photovoltaic generating device to reduce the output power when the energy storage battery of the energy storage device is fully charged.
Further, the fan foundation comprises a working platform, and the wind generating set, the photovoltaic power generation device, the energy storage device and the controller are all arranged on the working platform.
Further, the photovoltaic power generation device comprises a photovoltaic module and a bracket, and the photovoltaic module is connected with the working platform through the bracket;
the energy storage device comprises an energy storage battery, and the energy storage battery is arranged in a tower barrel of the wind generating set;
the rectifier is arranged in a steel structure of the fan foundation or a tower cylinder of the wind generating set;
the controller is arranged in a tower of the wind generating set.
In a second aspect, an embodiment of the present invention further provides a method for controlling an offshore wind power generation system, where the offshore wind power generation system includes: the wind generating set, the photovoltaic generating device, the energy storage device, the rectifier and the controller are respectively electrically connected with an electric energy input end of the rectifier, a control end of the rectifier, the wind generating set, the photovoltaic generating device, the energy storage device and the rectifier are respectively electrically connected with the controller, and the electric energy input end of the rectifier and the controller are respectively electrically connected with a power grid; the wind generating set is arranged on the fan foundation, a steel structure of the fan foundation serves as a protective cathode and is electrically connected with a negative electrode output end of the rectifier, and a grounding body of the fan foundation serves as an auxiliary anode and is electrically connected with a positive electrode output end of the rectifier;
the control method of the offshore wind power generation system comprises the following steps:
the controller controls the wind generating set, the photovoltaic generating device, the energy storage device and the power grid to output electric energy to the rectifier;
the controller controls the rectifier to supply power to the protective cathode and the auxiliary anode.
Further, the controller controls the wind generating set, the photovoltaic power generation device, the energy storage device and the electric energy output by the power grid to the rectifier to comprise:
when the generated energy of the wind generating set and the photovoltaic generating device is larger than the power consumption of the protective cathode and the auxiliary anode, the controller controls the wind generating set and the photovoltaic generating device to output residual electric quantity to the power grid and the energy storage device;
and when the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, the controller controls the energy storage device or the power grid to output electric energy to the rectifier.
Further, the controller controls the wind generating set, the photovoltaic power generation device, the energy storage device and the electric energy output by the power grid to the rectifier to comprise:
when the rectifier or the controller is disconnected with the power grid, if the generated energy of the wind generating set and the photovoltaic power generation device is larger than the power consumption of the protective cathode and the auxiliary anode, the controller controls the wind generating set and the photovoltaic power generation device to output residual electric quantity to the energy storage device;
and if the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, controlling the energy storage device to output electric energy to the rectifier.
Further, the control method further includes:
and the controller controls the wind generating set and the photovoltaic generating device to reduce the output power when the energy storage battery of the energy storage device is fully charged.
The embodiment of the invention provides an offshore wind power generation system and a control method thereof, wherein the offshore wind power generation system controls a wind power generator set, a photovoltaic power generation device, an energy storage device and a power grid to output electric energy to a rectifier through a controller, and controls the rectifier to convert the input electric energy into electric energy required for preventing corrosion of a steel structure of a fan foundation so as to supply power to a protection cathode and an auxiliary anode of the fan foundation, so that the problem that a long-term effective and economical deep sea fan foundation protection scheme in the prior art is lacked is solved, the steel structure of the fan foundation can be effectively prevented from being corroded, and safe and stable operation of the offshore wind power generation system is ensured. In addition, according to the scheme of the embodiment, the wind generating set, the photovoltaic power generation device, the energy storage device and the power grid are combined to supply power to the protective cathode and the auxiliary anode, and compared with an anti-corrosion scheme that the sacrificial anode needs to be replaced regularly in the traditional offshore wind power generation system, the scheme is more suitable for an offshore wind power generation system in deep and remote sea areas, is easy to implement and maintain, can be suitable for the whole life cycle of the offshore wind power generation system, and can also be used for solving the problem of emergency power utilization by feeding power back from the power grid even in the deep and remote sea areas.
Drawings
FIG. 1 is a schematic block diagram of an offshore wind power generation system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an offshore wind power generation system according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a method for controlling an offshore wind power generation system according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another method for controlling an offshore wind power generation system according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of another control method for an offshore wind power generation system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a module of an offshore wind power generation system according to an embodiment of the present invention. Fig. 1 schematically shows the electrical connection relationship between the module structures in the offshore wind power generation system. As shown in fig. 1, the offshore wind power generation system includes: the wind generating set 1, the photovoltaic power generation device 2, the energy storage device 3, the rectifier 4, the controller 5 and the fan foundation 7 are respectively and electrically connected with an electric energy input end A1 of the rectifier 4, a control end A2 of the rectifier 4, the wind generating set 1, the photovoltaic power generation device 2 and the energy storage device 3 are respectively and electrically connected with the controller 5, an electric energy input end A1 of the rectifier 4 and the controller 5 are respectively and electrically connected with a power grid 6, the wind generating set 1 is arranged on the fan foundation 7, a steel structure of the fan foundation 7 serves as a protective cathode B1 and is electrically connected with a negative electrode output end A3 of the rectifier 4, and a grounding body of the fan foundation 7 serves as an auxiliary anode B2 and is electrically connected with a positive electrode output end A4 of the rectifier 4.
The controller 5 controls the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and the power grid 6 to output electric energy to the rectifier 4, and the controller 5 controls the rectifier 4 to supply power to the protective cathode B1 and the auxiliary anode B2.
Specifically, referring to fig. 1, a wind generating set 1 can convert offshore wind energy into electric energy, a photovoltaic generating device 2 can convert offshore solar energy into electric energy, an energy storage device 3 can store the electric energy output by the wind generating set 1 and the photovoltaic generating device 2, a rectifier 4 can convert the electric energy output by the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and a power grid 6 to the rectifier 4, a fan foundation 7 can be used for fixing the wind generating set 1, the fan foundation 7 comprises a steel structure connected with the wind generating set 1 and a grounding body connecting a sea bed surface with the steel structure, a controller 5 can adjust the output power of the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and the power grid 6 and the electric energy conversion efficiency of the rectifier 4 to control the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and the power grid 6 to output electric energy to the rectifier 4, and the rectifier 4 is controlled to convert the electric energy, and the converted electric energy is output to supply power for a steel structure serving as a protective cathode B1 and a grounding body serving as an auxiliary anode B2.
Because the steel structure of the fan foundation 7 is soaked in seawater all the year round, the steel structure (composed of iron and carbon) and seawater and oxygen in seawater can form numerous tiny primary batteries, electrochemical reaction occurs, the iron component is used as the negative electrode of the primary battery to lose electrons, the carbon component is used as the positive electrode of the primary battery to obtain electrons to form hydroxyl radicals, and the iron component forms rust with the seawater and oxygen in the seawater after losing electrons and is dissolved in the seawater, so the steel structure can be corroded.
This offshore wind power generation system can effectively prevent that the steel construction of deep sea area sea fan basis 7 from being corroded, exemplarily, refer to fig. 1, this offshore wind power generation system's theory of operation does: the controller 5 is used for controlling the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and the power grid 6 to output electric energy, and the controller 5 is used for controlling the rectifier 4 to convert the electric energy output by the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and the power grid 6 into electric energy required by protecting a cathode B1 and an auxiliary anode B2 to protect a steel structure of the fan foundation 7 from being corroded, so that electron transfer can be generated around a protection cathode B1 and an auxiliary anode B2 of the fan foundation 7 in a mode of adding a direct current power supply, anions move to the auxiliary anode B2, lose electrons at the auxiliary anode B2 and are oxidized, cations move to the protection cathode B1, and the protection cathode B1 obtains electrons to be reduced, so that the steel structure of the fan foundation 7 is protected from being corroded.
According to the offshore wind power generation system provided by the embodiment of the invention, the controller is used for controlling the wind generating set, the photovoltaic power generation device, the energy storage device and the power grid to output electric energy to the rectifier, and controlling the rectifier to convert the input electric energy into electric energy required by preventing the corrosion of the steel structure of the fan foundation so as to supply power to the protection cathode and the auxiliary anode of the fan foundation, so that the problem that the protection scheme of the deep and remote offshore fan foundation which is effective for a long time and good in economy is lacked in the prior art is solved, the steel structure of the fan foundation can be effectively prevented from being corroded, and the safe and stable operation of the offshore wind power generation system is ensured. In addition, according to the scheme of the embodiment, the wind generating set, the photovoltaic power generation device, the energy storage device and the power grid are combined to supply power to the protective cathode and the auxiliary anode, and compared with an anti-corrosion scheme that the sacrificial anode needs to be replaced regularly in the traditional offshore wind power generation system, the scheme is more suitable for an offshore wind power generation system in deep and remote sea areas, is easy to implement and maintain, can be suitable for the whole life cycle of the offshore wind power generation system, and can also be used for solving the problem of emergency power utilization by feeding power back from the power grid even in the deep and remote sea areas.
Fig. 2 is a schematic structural diagram of an offshore wind power generation system according to an embodiment of the present invention. As shown in fig. 1 and 2, the steel structure 71 of the fan base 7 immersed in seawater can be used as a protective cathode B1, and the grounding body 72 can be used as an auxiliary anode B2. Alternatively, on the basis of the above technical solutions, referring to fig. 1 and 2, the controller 5 may be configured to control the wind generating set 1 and the photovoltaic power generating apparatus 2 to output the remaining power to the power grid 6 and the energy storage apparatus 3 when the power generation amounts of the wind generating set 1 (fig. 2 only shows a partial structure of the wind generating set 1) and the photovoltaic power generating apparatus 2 are greater than the power consumption amounts of the protective cathode B1 and the auxiliary anode B2; and when the power generation amount of the wind generating set 1 and the photovoltaic power generation device 2 is less than the power consumption of the protective cathode B1 and the auxiliary anode B2, controlling the energy storage device 3 or the power grid 6 to output electric energy to the rectifier 4.
Illustratively, when the power generation amount of the wind generating set 1 and the photovoltaic generating set 2 is larger than the power consumption amount of the protective cathode B1 and the auxiliary anode B2 for preventing the corrosion of the steel structure 71, the controller 5 may only control the wind generating set 1 and the photovoltaic generating set 2 to output the power to the rectifier 4, convert the input power through the rectifier 4 to supply power to the protective cathode B1 and the auxiliary anode B2, and control the wind generating set 1 and the photovoltaic generating set 2 to output the residual power except the power consumption amount for preventing the corrosion of the steel structure 71 to the power grid 6 and the energy storage device 3 through the controller 5, so that the residual power can be used for supplying power and storing the power grid 6, and the offshore wind generating system can supply power for preventing the corrosion of the steel structure 71 at the same time of supplying power to the power grid 6; when the power generation capacity of the wind generating set 1 and the photovoltaic generating set 2 is less than the power consumption of the protective cathode B1 and the auxiliary anode B2 for preventing the steel structure 71 from being corroded, the controller 5 can control the energy storage device 3 or the power grid 6 to output electric energy to the rectifier 4, so that power can be supplied to the protective cathode B1 and the auxiliary anode B2 through the energy storage device 3 or the power grid 6 under the condition that the power generation capacity of the wind generating set 1 and the photovoltaic generating set 2 is low due to insufficient offshore wind power or insufficient illumination, and the corrosion resistance of the offshore wind generating set is prevented from being affected.
Alternatively, on the basis of the above technical solutions, referring to fig. 1 and 2, the controller 5 may be further configured to, when the rectifier 4 or the controller 5 is disconnected from the power grid 6, control the wind generating set 1 and the photovoltaic power generating device 2 to output the remaining electric energy to the energy storage device 3 if the electric energy generated by the wind generating set 1 and the photovoltaic power generating device 2 is greater than the electric energy used by the protective cathode B1 and the auxiliary anode B2; and if the power generation amounts of the wind generating set 1 and the photovoltaic power generation device 2 are less than the power consumption of the protective cathode B1 and the auxiliary anode B2, controlling the energy storage device 3 to output electric energy to the rectifier 4.
For example, if the offshore wind power generation system or the power grid 6 fails, which results in the offshore wind power generation system being disconnected from the power grid 6, at this time, if the power generation amounts of the wind power generation unit 1 and the photovoltaic power generation device 2 are greater than the power consumption amounts of the protection cathode B1 and the auxiliary anode B2, the controller 5 may control the wind power generation unit 1 and the photovoltaic power generation device 2 to output electric energy to the rectifier 4, convert the input electric energy through the rectifier 4 to supply power to the protection cathode B1 and the auxiliary anode B2, and control the wind power generation unit 1 and the photovoltaic power generation device 2 to output the remaining power generation amounts to the energy storage device 3 for storage through the controller 5; if the power generation amount of the wind generating set 1 and the photovoltaic power generation device 2 is less than the power consumption amount of the protective cathode B1 and the auxiliary anode B2, the controller 5 can only control the energy storage device 3 to output electric energy to the rectifier 4, and the energy storage device is used for supplying power to the protective cathode B1 and the auxiliary anode B2.
Alternatively, on the basis of the above technical solutions, with continued reference to fig. 1 and 2, the controller 5 may also be configured to control the wind turbine generator set 1 and the photovoltaic power generation apparatus 2 to reduce the output power when the energy storage battery of the energy storage device 3 is fully charged.
For example, in the case that the offshore wind power generation system is disconnected from the power grid 6 due to a fault, since power supply to the power grid 6 is no longer needed, if the energy storage battery of the energy storage device 3 is fully charged, the controller 5 may control the wind generating set 1 and the photovoltaic power generation device 2 to reduce the output power, so that the output power of the wind generating set 1 and the photovoltaic power generation device 2 satisfies the power consumption of the protection cathode B1 and the auxiliary anode B2, so as to avoid energy waste.
As shown in fig. 1-2, optionally, on the basis of the above technical solution, the wind turbine foundation 7 includes a working platform 73, and the wind turbine generator set 1, the photovoltaic power generation apparatus 2, the energy storage apparatus 3, and the controller 5 are all disposed on the working platform 73. Specifically, the part of the fan foundation 7 far away from the sea level can comprise a working platform 73, and the wind generating set 1, the photovoltaic generating device 2, the energy storage device 3 and the controller 5 can be arranged on the working platform 73, so that the wind generating set can be waterproof and is convenient for operation and maintenance of workers.
With continuing reference to fig. 1-2, optionally, based on the above technical solution, the photovoltaic power generation apparatus 2 includes a photovoltaic module 21 and a support 22, the photovoltaic module 21 is connected to the working platform 73 through the support 22; the energy storage device 3 comprises an energy storage battery which is arranged in a tower tube 11 of the wind generating set 1; the rectifier 4 is arranged in a steel structure 71 of the fan foundation 7 or a tower barrel 11 of the wind generating set 1; the controller 5 is disposed in the tower 11 of the wind turbine generator system 1.
Specifically, the photovoltaic module 21 may be used for photovoltaic power generation, and the support 22 is used for connecting the photovoltaic module 21 and the working platform 73; the energy storage battery of the energy storage device 3 is arranged in the tower barrel 11 of the wind generating set 1 so as to store point electric energy and prevent seawater soaking; the rectifier 4 (not shown in fig. 2) may be disposed in a position convenient to control, such as a steel structure 71 of the wind turbine foundation 7 or a tower 11 of the wind turbine generator system 1, according to practical application requirements; the controller 5 is disposed in the tower 11 of the wind turbine generator system 1 so as to control the wind turbine generator system 1, the photovoltaic power generation device 2, the energy storage device 3, the rectifier 4 and the power grid 6 (not shown in fig. 2) and prevent seawater immersion.
The embodiment of the invention also provides a control method of the offshore wind power generation system, and the control method can be used for controlling the offshore wind power generation system provided by the embodiment of the invention. Fig. 3 is a schematic flow chart of a control method of an offshore wind power generation system according to an embodiment of the present invention. As shown in fig. 1 and 3, the offshore wind power generation system includes: the wind generating set 1, the photovoltaic power generation device 2, the energy storage device 3, the rectifier 4, the controller 5 and the fan foundation 7 are respectively and electrically connected with an electric energy input end A1 of the rectifier 4, a control end A2 of the rectifier 4, the wind generating set 1, the photovoltaic power generation device 2, the energy storage device 3 and the rectifier 4 are respectively and electrically connected with the controller 5, an electric energy input end A1 of the rectifier 4 and the controller 5 are respectively and electrically connected with a power grid 6, the wind generating set 1 is arranged on the fan foundation 7, a steel structure 71 of the fan foundation 7 serves as a protective cathode B1 and is electrically connected with a negative electrode output end A3 of the rectifier 4, and a grounding body 72 of the fan foundation 7 serves as an auxiliary anode B2 and is electrically connected with a positive electrode output end A4 of the rectifier 4;
the control method of the offshore wind power generation system comprises the following steps:
step S110, the controller 5 controls the wind generating set 1, the photovoltaic power generation device 2, the energy storage device 3 and the power grid 6 to output electric energy to the rectifier 4.
Specifically, referring to fig. 1 and 3, the output powers of the wind generating set 1, the photovoltaic power generation apparatus 2, the energy storage apparatus 3 and the power grid 6 and the electric energy conversion efficiency of the rectifier 4 may be adjusted by the controller 5 to control the wind generating set 1, the photovoltaic power generation apparatus 2, the energy storage apparatus 3 and the power grid 6 to output electric energy to the rectifier 4.
Step S120, the controller 5 controls the rectifier 4 to supply power to the protective cathode B1 and the auxiliary anode B2.
Specifically, referring to fig. 1 and 3, the rectifier 4 may be controlled by the controller 5 to perform power conversion, and output the converted power to power the steel structure as the protective cathode B1 and the ground as the auxiliary anode B2.
According to the control method of the offshore wind power generation system, the controller controls the wind power generation unit, the photovoltaic power generation device, the energy storage device and the power grid to output electric energy to the rectifier, the rectifier is controlled to convert the input electric energy into electric energy required for preventing corrosion of a steel structure of the wind turbine foundation, and the electric energy is used for supplying power to the protection cathode and the auxiliary anode of the wind turbine foundation, so that the problem that a long-term effective and good-economical protection scheme for the offshore wind turbine foundation in the deep sea area is lacked in the prior art is solved, the steel structure of the wind turbine foundation can be effectively prevented from being corroded, and safe and stable operation of the offshore wind power generation system is guaranteed. In addition, according to the scheme of the embodiment, the wind generating set, the photovoltaic power generation device, the energy storage device and the power grid are combined to supply power to the protective cathode and the auxiliary anode, and compared with an anti-corrosion scheme that the sacrificial anode needs to be replaced regularly in the traditional offshore wind power generation system, the scheme is more suitable for an offshore wind power generation system in deep and remote sea areas, is easy to implement and maintain, can be suitable for the whole life cycle of the offshore wind power generation system, and can also be used for solving the problem of emergency power utilization by feeding power back from the power grid even in the deep and remote sea areas.
FIG. 4 is a schematic flow chart of another control method for an offshore wind power generation system according to an embodiment of the present invention. Optionally, with reference to fig. 1-2 and 4, on the basis of the foregoing technical solution, the method for controlling an offshore wind power generation system specifically includes:
and S210, when the power generation amount of the wind generating set 1 and the photovoltaic power generation device 2 is larger than the power consumption amount of the protective cathode B1 and the auxiliary anode B2, the controller 5 controls the wind generating set 1 and the photovoltaic power generation device 2 to output the residual power to the power grid 6 and the energy storage device 3.
For example, referring to fig. 1-2, when the power generation capacity of the wind turbine generator system 1 and the photovoltaic generator system 2 is greater than the power consumption of the protective cathode B1 and the auxiliary anode B2 to prevent the corrosion of the steel structure 71, the controller 5 may only control the wind turbine generator system 1 and the photovoltaic generator system 2 to output the power to the rectifier 4, convert the input power by the rectifier 4 to supply power to the protective cathode B1 and the auxiliary anode B2, and control the wind turbine generator system 1 and the photovoltaic generator system 2 to output the remaining power except the power consumption to prevent the corrosion of the steel structure 71 to the power grid 6 and the energy storage device 3 by the controller 5, so that the remaining power can be used for supplying power to and storing the power grid 6, and the offshore wind turbine generator system can also supply power for the corrosion prevention of the steel structure 71 while supplying power to the power grid 6.
And S220, when the power generation amount of the wind generating set 1 and the photovoltaic power generation device 2 is smaller than the power consumption amount of the protective cathode B1 and the auxiliary anode B2, the controller 5 controls the energy storage device 3 or the power grid 6 to output electric energy to the rectifier 4.
For example, referring to fig. 1-2, when the power generation capacity of the wind generating set 1 and the photovoltaic power generation device 2 is less than the power consumption of the protective cathode B1 and the auxiliary anode B2 to prevent the steel structure 71 from corroding, the controller 5 can control the energy storage device 3 or the power grid 6 to output electric energy to the rectifier 4, so that the protective cathode B1 and the auxiliary anode B2 can be supplied with power through the energy storage device 3 or the power grid 6 under the condition that the power generation capacity of the wind generating set 1 and the photovoltaic power generation device 2 is low due to insufficient offshore wind power or insufficient illumination, so as to avoid affecting the corrosion resistance of the offshore wind generating system.
It should be noted that the execution sequence of steps S210 and S220 is not limited in the embodiment of the present invention, and step S210 or step S220 may be determined and executed in accordance with the magnitude relationship between the power generation amounts of the wind turbine generator set 1 and the photovoltaic power generation apparatus 2 and the power consumption amounts of the protective cathode B1 and the auxiliary anode B2.
Step S230, the controller 5 controls the rectifier 4 to supply power to the protective cathode B1 and the auxiliary anode B2.
FIG. 5 is a schematic flow chart of another control method for an offshore wind power generation system according to an embodiment of the present invention. Optionally, with reference to fig. 1-2 and 5, on the basis of the foregoing technical solution, the method for controlling an offshore wind power generation system specifically includes:
and S310, when the rectifier 4 or the controller 5 is disconnected from the power grid 6, if the power generation amount of the wind generating set 1 and the photovoltaic power generation device 2 is larger than the power consumption amount of the protective cathode B1 and the auxiliary anode B2, the controller 5 controls the wind generating set 1 and the photovoltaic power generation device 2 to output the residual power to the energy storage device 3.
For example, if the offshore wind power generation system or the power grid 6 fails to work and the offshore wind power generation system is disconnected from the power grid 6, at this time, if the power generation amounts of the wind power generation system 1 and the photovoltaic power generation device 2 are greater than the power consumption amounts of the protection cathode B1 and the auxiliary anode B2, the controller 5 may control the wind power generation system 1 and the photovoltaic power generation device 2 to output electric energy to the rectifier 4, convert the input electric energy through the rectifier 4 to supply power to the protection cathode B1 and the auxiliary anode B2, and control the wind power generation system 1 and the photovoltaic power generation device 2 to output the residual power generation amounts to the energy storage device 3 for storage through the controller 5.
And S320, when the rectifier 4 or the controller 5 is disconnected from the power grid 6, if the power generation amount of the wind generating set 1 and the photovoltaic power generation device 2 is less than the power consumption amount of the protective cathode B1 and the auxiliary anode B2, the controller 5 controls the energy storage device 3 to output the electric energy to the rectifier 4.
For example, if the power generation amounts of the wind generating set 1 and the photovoltaic power generation device 2 are less than the power consumption amounts of the protective cathode B1 and the auxiliary anode B2, the controller 5 can only control the energy storage device 3 to output the electric energy to the rectifier 4, and the protective cathode B1 and the auxiliary anode B2 are supplied with power through the energy storage device.
In step S330, when the rectifier 4 or the controller 5 is disconnected from the power grid 6, if the energy storage battery of the energy storage device 3 is fully charged, the controller 5 controls the wind turbine generator system 1 and the photovoltaic power generation device 2 to reduce the output power.
For example, in the case that the offshore wind power generation system is disconnected from the power grid 6 due to a fault, since power supply to the power grid 6 is no longer needed, if the energy storage battery of the energy storage device 3 is fully charged, the controller 5 may control the wind generating set 1 and the photovoltaic power generation device 2 to reduce the output power, so that the output power of the wind generating set 1 and the photovoltaic power generation device 2 satisfies the power consumption of the protection cathode B1 and the auxiliary anode B2, so as to avoid energy waste.
It should be noted that the execution sequence of steps S310 to S330 is not limited in the embodiment of the present invention, and step S310, step S320 or step S330 may be determined to be executed in combination with the quantity relationship between the power generation amounts of the wind generating set 1 and the photovoltaic power generation apparatus 2 and the power consumption amounts of the protective cathode B1 and the auxiliary anode B2, and the power consumption condition of the energy storage battery.
In step S340, the controller 5 controls the rectifier 4 to supply power to the protective cathode B1 and the auxiliary anode B2.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An offshore wind power generation system, comprising:
the wind generating set, the photovoltaic generating device, the energy storage device, the rectifier and the controller are respectively and electrically connected with an electric energy input end of the rectifier, a control end of the rectifier, the wind generating set, the photovoltaic generating device and the energy storage device are respectively and electrically connected with the controller, an electric energy input end of the rectifier and the controller are respectively and electrically connected with a power grid, and the controller controls the wind generating set, the photovoltaic generating device, the energy storage device and the power grid to output electric energy to the rectifier; and the number of the first and second groups,
the wind turbine generator system comprises a wind turbine foundation, a wind turbine generator set, a rectifier, a controller and a ground body of the wind turbine foundation, wherein the wind turbine generator set is arranged on the wind turbine foundation, a steel structure of the wind turbine foundation is used as a protection cathode and is electrically connected with a negative output end of the rectifier, a ground body of the wind turbine foundation is used as an auxiliary anode and is electrically connected with a positive output end of the rectifier, and the controller controls the rectifier to supply power to the protection cathode and.
2. The offshore wind power generation system of claim 1, wherein the controller is configured to control the wind power generation unit and the photovoltaic power generation device to output surplus power to the grid and the energy storage device when the power generation amount of the wind power generation unit and the photovoltaic power generation device is greater than the power consumption amount of the protection cathode and the auxiliary anode;
and when the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, controlling the energy storage device or the power grid to output electric energy to the rectifier.
3. The offshore wind power generation system of claim 1, wherein the controller is configured to control the wind power generation unit and the photovoltaic power generation device to output the remaining power to the energy storage device if the power generation amounts of the wind power generation unit and the photovoltaic power generation device are greater than the power consumption amounts of the protection cathode and the auxiliary anode when the rectifier or the controller is disconnected from the grid;
and if the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, controlling the energy storage device to output electric energy to the rectifier.
4. The offshore wind power generation system of claim 3, wherein the controller is further configured to control the wind turbine generator set and the photovoltaic power generation device to reduce the output power when the energy storage battery of the energy storage device is fully charged.
5. The offshore wind power generation system of claim 1, wherein the wind turbine foundation comprises a work platform, and the wind turbine generator system, the photovoltaic power generation device, the energy storage device, and the controller are all disposed on the work platform.
6. Offshore wind power generation system according to claim 5,
the photovoltaic power generation device comprises a photovoltaic module and a bracket, and the photovoltaic module is connected with the working platform through the bracket;
the energy storage device comprises an energy storage battery, and the energy storage battery is arranged in a tower barrel of the wind generating set;
the rectifier is arranged in a steel structure of the fan foundation or a tower cylinder of the wind generating set;
the controller is arranged in a tower of the wind generating set.
7. A method of controlling an offshore wind power generation system, the offshore wind power generation system comprising: the wind generating set, the photovoltaic generating device, the energy storage device, the rectifier and the controller are respectively electrically connected with an electric energy input end of the rectifier, a control end of the rectifier, the wind generating set, the photovoltaic generating device, the energy storage device and the rectifier are respectively electrically connected with the controller, and the electric energy input end of the rectifier and the controller are respectively electrically connected with a power grid; the wind generating set is arranged on the fan foundation, a steel structure of the fan foundation serves as a protective cathode and is electrically connected with a negative electrode output end of the rectifier, and a grounding body of the fan foundation serves as an auxiliary anode and is electrically connected with a positive electrode output end of the rectifier;
the control method of the offshore wind power generation system comprises the following steps:
the controller controls the wind generating set, the photovoltaic generating device, the energy storage device and the power grid to output electric energy to the rectifier;
the controller controls the rectifier to supply power to the protective cathode and the auxiliary anode.
8. The method of claim 7, wherein the controller controlling the wind turbine generator system, the photovoltaic generator system, the energy storage device, and the grid to output the electric power to the rectifier comprises:
when the generated energy of the wind generating set and the photovoltaic generating device is larger than the power consumption of the protective cathode and the auxiliary anode, the controller controls the wind generating set and the photovoltaic generating device to output residual electric quantity to the power grid and the energy storage device;
and when the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, the controller controls the energy storage device or the power grid to output electric energy to the rectifier.
9. The method of claim 7, wherein the controller controlling the wind turbine generator system, the photovoltaic generator system, the energy storage device, and the grid to output the electric power to the rectifier comprises:
when the rectifier or the controller is disconnected with the power grid, if the generated energy of the wind generating set and the photovoltaic power generation device is larger than the power consumption of the protective cathode and the auxiliary anode, the controller controls the wind generating set and the photovoltaic power generation device to output residual electric quantity to the energy storage device;
and if the generated energy of the wind generating set and the photovoltaic generating device is less than the power consumption of the protective cathode and the auxiliary anode, controlling the energy storage device to output electric energy to the rectifier.
10. The method of controlling an offshore wind power generation system according to claim 9, further comprising:
and the controller controls the wind generating set and the photovoltaic generating device to reduce the output power when the energy storage battery of the energy storage device is fully charged.
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