CN108599084B - Lightning protection system of tidal current energy unit and tidal current energy unit comprising same - Google Patents
Lightning protection system of tidal current energy unit and tidal current energy unit comprising same Download PDFInfo
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- CN108599084B CN108599084B CN201810750166.3A CN201810750166A CN108599084B CN 108599084 B CN108599084 B CN 108599084B CN 201810750166 A CN201810750166 A CN 201810750166A CN 108599084 B CN108599084 B CN 108599084B
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- 239000004020 conductor Substances 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 108010066114 cabin-2 Proteins 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/40—Connection to earth
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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
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a lightning protection system of a tidal current energy unit and the tidal current energy unit comprising the same, and belongs to the field of lightning protection equipment of the tidal current energy unit. The lightning protection system comprises a metal grounding network and three lightning protection subsystems which are connected with the metal grounding network in a conducting way, wherein the platform lightning protection subsystem comprises a platform lightning receiving device, a platform SPD lightning arrester and a platform equipotential grounding conductor which are arranged on the water platform part; the grid-connected lightning protection subsystem comprises a shore-based lightning receiving device, a grid-connected SPD lightning arrester and a grid-connected equipotential grounding conductor which are arranged on the distributed grid-connected device part; the underwater lightning protection subsystem comprises an underwater SPD lightning arrester and an underwater equipotential grounding conductor which are arranged on the underwater part of the tidal current energy unit. The lightning protection system of the tidal current energy generator set is formed by the configuration of lightning protection equipment, including the SPD lightning arrester, the equipotential connection and the metal grounding network, so that the safe and stable operation of the generator set under abnormal weather conditions is ensured.
Description
Technical Field
The invention relates to the field of lightning protection of tidal current energy units, in particular to a lightning protection system of a tidal current energy unit and the tidal current energy unit comprising the same, and particularly relates to implementation of a lightning protection system under two installation modes of a floating platform type and a pile type.
Background
The ocean area of China is wide, huge energy is stored in the ocean, tidal current energy power generation is a novel hydroelectric power generation mode, the flow of tidal seawater is utilized to push the blades to rotate so as to convert the blade into electric energy, and although the tidal current energy power generation has great potential for future power supply.
At present, the design of the tidal current energy generator set basically only considers the implementation mode and the control strategy of the generator set, basically only focuses on the performance and the function implementation of the generator set, and rarely considers the running condition of the tidal current energy generator set in a lightning environment. Along with the increase of the single-machine capacity of the tidal current energy unit and the diffusion of the distribution area, the lightning protection of the unit, the platform and the distributed grid-connected device in the sea water is more and more important and urgent.
At present, lightning protection of the tidal current energy generator set is a new subject, and no mature technical scheme exists at present.
Disclosure of Invention
The invention aims to provide a lightning protection system of a tidal current energy unit for carrying out lightning protection on the tidal current energy unit and related equipment thereof and the tidal current energy unit comprising the lightning protection system.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in one aspect, the invention provides a lightning protection system of a tidal current energy unit, which comprises three parts, namely an underwater part, an on-water platform part and a distributed grid-connected device part of the tidal current energy unit, wherein the three parts comprise a metal grounding grid and three lightning protection subsystems which are in conductive connection with the metal grounding grid, and the three lightning protection subsystems are respectively arranged on the underwater part, the on-water platform part and the distributed grid-connected device part of the tidal current energy unit;
the platform lightning protection subsystem comprises a platform lightning receiving device, a platform SPD lightning arrester and a platform equipotential grounding conductor, wherein the platform lightning receiving device, the platform SPD lightning arrester and the platform equipotential grounding conductor are installed on the water platform part, the platform SPD lightning arrester is used for being installed on a signal system, a power supply and electric components of the water platform part, the platform equipotential grounding conductor is used for being respectively arranged on all the components of the water platform part and connected through equipotential, and the platform lightning receiving device is used for being installed on the platform and connected with other components through equipotential;
the grid-connected lightning protection subsystem comprises a shore-based lightning receiving device, a grid-connected SPD lightning arrester and a grid-connected equipotential grounding conductor, wherein the shore-based lightning receiving device, the grid-connected SPD lightning arrester and the grid-connected equipotential grounding conductor are installed on the distributed grid-connected device, the grid-connected SPD lightning arrester is used for being installed on a signal system, a power supply and electric components of the distributed grid-connected device, the grid-connected equipotential grounding conductor is used for being respectively arranged on all components of the distributed grid-connected device and connected with the metal grounding grid through equipotential, and the shore-based lightning receiving device is used for being installed on the distributed grid-connected device and connected with the metal grounding grid through equipotential;
the underwater lightning protection subsystem comprises an underwater SPD lightning arrester arranged on the underwater part of the tidal current energy unit and an underwater equipotential grounding conductor, wherein the underwater SPD lightning arrester is used for being arranged on a signal system, a power supply and electric components of the underwater part of the tidal current energy unit, and the underwater equipotential grounding conductor is used for being respectively arranged on all components of the underwater part of the tidal current energy unit and connected through equipotential.
Further, the three lightning protection subsystems are connected with the metal grounding network in a cable connection mode, and the three lightning protection subsystems are connected with each other through cables in an equipotential manner.
Further, overhead line protection and tiled cable protection for the power protection of the various sections are included.
Further, the power protection of each part adopts double I-level lightning protection and equipotential grounding protection.
Further, in the grid-connected lightning protection subsystem, the transformer and the grid-connected control cabinet adopt I-level lightning protection, the electric appliance cabinet adopts II-level lightning protection, and the network cabinet adopts III-level lightning protection.
Further, the platform SPD lightning arrester of the platform lightning protection subsystem comprises a control cabinet SPD, a converter SPD and a signal SPD which are arranged on the control cabinet and the converter.
Further, the grid-connected SPD lightning arrester of the grid-connected lightning protection subsystem comprises a grid-connected control cabinet SPD and a transformer SPD which are arranged on the grid-connected control cabinet and the transformer.
Further, the underwater SPD lightning arrester of the underwater lightning protection subsystem comprises a pitch system SPD and a tail cabin cabinet SPD which are arranged on the pitch system and the tail cabin cabinet;
the pitch system SPD comprises a pitch system power supply SPD and a pitch system signal SPD; the tail tank SPDs include a tail tank power supply SPD and a tail tank signal SPD.
On the other hand, a tidal current energy unit is provided, and a lightning protection system of the tidal current energy unit is included.
Furthermore, the lightning protection system of the tidal current energy unit is arranged on the basis of lightning protection area division results of the tidal current energy unit, wherein the lightning protection area division results are the results of dividing lightning protection areas of different grades of the tidal current energy unit by using a rolling ball method.
By adopting the technical scheme, the invention has at least the following advantages:
(1) The invention provides a lightning protection system, which comprises an underwater lightning protection subsystem, a platform lightning protection subsystem and a grid-connected lightning protection subsystem, wherein an SPD lightning arrester, a lightning receiving device, equipotential connection and a metal grounding grid in the three subsystems form a complete tidal current energy generating set lightning protection system. According to the invention, the control signals, the power supply, the electrical components, the control system, the driving system and the grid-connected system of the tidal current energy generator set are subjected to targeted lightning protection at different levels, so that the safe and stable operation of the generator set under abnormal weather conditions is ensured.
(2) The lightning protection of the tidal current energy unit is mainly aimed at the lightning protection of power supplies and signals affecting the operation of the unit, the lightning protection of a platform is mainly aimed at the protection of equipment and related personnel on the platform, and the protection of the distributed grid-connected device comprises the protection of the grid-connected device and the lightning protection of matched buildings.
Drawings
The foregoing is merely an overview of the present invention, and the present invention is further described in detail below with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of a lightning protection system of a floating platform type tidal current energy unit of the invention;
FIG. 2 is a schematic diagram of a lightning protection system of a pile-type tidal current energy unit according to the present invention;
FIG. 3 is a schematic diagram of a tidal current energy generating set lightning protection implementation of the present invention;
FIG. 4 is a schematic view of lightning protection of a lightning protection subsystem of a distributed grid-connected device of the tidal current energy genset of the present invention;
FIG. 5 is a schematic view of lightning protection of the lightning protection subsystem of the water platform (floating or stake) of the tidal current energy genset of the present invention;
fig. 6 is a schematic view of lightning protection of an underwater lightning protection subsystem of a tidal current energy genset of the present invention.
Detailed Description
The invention provides an embodiment of a lightning protection system of a tidal current energy unit, as shown in fig. 1 to 6, the tidal current energy unit comprises three parts, namely an underwater part of the tidal current energy unit, an upper platform part and a distributed grid-connected device part, wherein the three parts comprise a metal grounding grid and three lightning protection subsystems which are in conductive connection with the metal grounding grid, and the three lightning protection subsystems are respectively arranged on the underwater part, the upper platform part and the distributed grid-connected device part of the tidal current energy unit; the platform lightning protection subsystem comprises a platform lightning receiving device, a platform SPD lightning arrester and a platform equipotential grounding conductor, wherein the platform lightning receiving device, the platform SPD lightning arrester and the platform equipotential grounding conductor are installed on a water platform part, the platform SPD lightning arrester is used for being installed on a signal system, a power supply and electric components of the water platform part, the platform equipotential grounding conductor is used for being respectively arranged on all components of the water platform part and connected through equipotential, and the platform lightning receiving device is used for being installed on the platform and connected with other components through cables; the grid-connected lightning protection subsystem comprises a shore-based lightning receiving device, a grid-connected SPD lightning arrester and a grid-connected equipotential grounding conductor, wherein the shore-based lightning receiving device, the grid-connected SPD lightning arrester and the grid-connected equipotential grounding conductor are installed on a distributed grid-connected device part, the grid-connected SPD lightning arrester is used for being installed on a signal system, a power supply and electric components of the distributed grid-connected device part, the grid-connected equipotential grounding conductor is used for being respectively arranged on all components of the distributed grid-connected device part and connected with the metal grounding grid through equipotential; the underwater lightning protection subsystem comprises an underwater SPD lightning arrester mounted on the underwater part of the tidal current energy unit and an underwater equipotential grounding conductor, wherein the underwater SPD lightning arrester is used for being mounted on a signal system, a power supply and electric components of the underwater part of the tidal current energy unit, and the underwater equipotential grounding conductor is used for being respectively arranged on all components of the underwater part of the tidal current energy unit and connected through equipotential.
When the lightning protection device is used, the SPD lightning arresters (including the platform SPD lightning arresters, the underwater SPD lightning arresters and the grid-connected SPD lightning arresters) are respectively installed on a signal system, a power supply and an electric component, lightning electromagnetic pulse protection is realized by installing the SPD lightning arresters with different voltage levels, and the different electric components select the SPDs with different voltage levels according to rated voltages. Because the water platform is exposed on the sea surface, the platform lightning protection subsystem mainly comprises two kinds of components: direct lightning strike and lightning electromagnetic pulse protection; the lightning arrester and/or the lightning arrester are/is arranged at the high points of different areas of the platform according to the rolling ball method to protect, meanwhile, the lightning arrester or the lightning arrester is/are connected with a grounding conductor, so that lightning current is released, electric components on the platform are required to be protected by lightning electromagnetic pulse, the lightning arrester is also realized by installing the SPD lightning arresters with different voltage levels, the underwater lightning protection subsystem mainly protects lightning electromagnetic pulse from a unit power supply and lightning current conducted by sea water around the unit, lightning electromagnetic pulse protection is realized by installing the SPD lightning arresters with different voltage levels on the electric components, and the lightning current conducted by sea water is released mainly through equipotential grounding connection. All components are protected from lightning by equipotential connection through equipotential ground. The lightning current is discharged through the connection with the metal grounding net, so that the lightning protection effect is achieved.
Further, the three lightning protection subsystems are connected with the metal grounding network in a cable connection mode, and the three lightning protection subsystems are connected with each other through cables in an equipotential manner. The lightning current discharging is completed through the connection of the cable and the metal grounding net, so that the components or the platform and the like are protected.
Further, the equipotential connection is realized by a yellow-green wire, a copper braid or a cable. The conducted lightning current from the sea water is discharged mainly through an equipotential connection. The tidal current energy unit is a metal part connected together, all the parts are connected in an equipotential manner through yellow-green wires, copper braid belts or cables, the parts are connected in an equipotential manner through the yellow-green wires or the copper braid belts, and the equipotential connection is realized through cables at a relatively long distance, for example, 120mm can be realized through one cable 2 The cable and the platform of the device are connected in an equipotential manner.
In order to perform comprehensive lightning electromagnetic pulse protection, the platform SPD lightning arrester and the underwater SPD lightning arrester all comprise a signal SPD, a power supply SPD and an electric component SPD. The control signal, the power supply and the electrical component realize lightning discharge through SOD lightning arresters with different voltage levels.
In order to double protect the power supply, overhead line protection and tiled cable protection for the power supply protection of each part are also included.
Preferably, the power protection of each part adopts double I-level lightning protection and protection measures of equipotential grounding.
Further, in the grid-connected lightning protection subsystem, the transformer and the grid-connected control cabinet adopt I-level lightning protection, the electric appliance cabinet adopts II-level lightning protection, and the network cabinet adopts III-level lightning protection.
The distributed installation of the SPD lightning arresters with respect to the various electrical components of the tidal current energy Unit is shown in figures 4 to 6, in particular,
in the embodiment, the platform SPD lightning arrester of the platform lightning protection subsystem comprises a control cabinet SPD and a converter SPD which are arranged on the control cabinet and the converter; the control cabinet SPD comprises a control cabinet power supply SPD and a control cabinet signal SPD.
In the embodiment, the grid-connected SPD lightning arrester of the grid-connected lightning protection subsystem comprises a grid-connected control cabinet SPD, a transformer SPD and a signal SPD which are arranged on the grid-connected control cabinet and the transformer;
the control cabinet SPD comprises a control cabinet power supply SPD and a control cabinet signal SPD.
In the above embodiment, the underwater SPD lightning arrester of the underwater lightning protection subsystem includes a pitch system SPD and a tail tank SPD mounted on the pitch system and the tail tank; the pitch system SPD comprises a pitch system power supply SPD and a pitch system signal SPD; the tail tank SPDs include a tail tank power supply SPD and a tail tank signal SPD.
In order to make the lightning protection system more intelligent, the lightning protection system further comprises a controller for correspondingly controlling the lightning protection equipment. The controller may control the lightning protection means accordingly.
In order to form a relatively complete lightning protection system, the lightning protection area of the tidal current energy unit needs to be divided: and respectively dividing lightning protection areas of the tidal current energy generator set and the distributed grid-connected area by using a rolling ball method based on the sea water surface and the building foundation horizontal plane of the distributed grid-connected area. The lightning protection area is divided into three areas according to a rolling ball method: the lightning protection area LPZ0A of class I, the lightning protection area LPZ0B of class II and the lightning protection area LPZ1 of class III. As shown in fig. 1 and fig. 2, the division schematic diagram of lightning protection areas of a tidal current energy generating set (floating type or pile type) and a distributed grid-connected module is shown, for example, a generating set 1 of an underwater part of the tidal current energy generating set is a level III lightning protection area LPZ1, an equipment cabin 2 is a level III lightning protection area LPZ1, an on-water platform 4 is a level III lightning protection area LPZ1, and a distributed grid-connected device 3 is a level III lightning protection area LPZ1. According to the lightning protection system design of the tidal current energy unit, which is divided according to lightning protection areas, the whole lightning protection system can comprise four parts: the lightning protection subsystem is connected with the lightning protection subsystem of the distributed grid-connected device and the equipotential. The underwater lightning protection subsystem is mainly aimed at lightning protection of power supplies and signals affecting the operation of the unit, the platform lightning protection subsystem is mainly aimed at protection of equipment and related personnel on the platform, and the distributed grid-connected device lightning protection subsystem comprises grid-connected device protection and lightning protection of matched buildings.
One example of a lightning protection arrangement divided by lightning protection areas is as follows:
1) The lightning protection subsystem of the distributed grid-connected device is shown in fig. 4, and the content of the lightning protection subsystem comprises the following parts: the lightning receiving device, the lightning current discharging channel, the component lightning protection, the power protection and the equipotential connection.
The power protection comprises overhead line protection and tiled cable protection. The power supply protection adopts double I-level lightning protection and equipotential grounding protection measures.
The transformer and the grid-connected control cabinet adopt I-level lightning protection, the electrical cabinet adopts II-level lightning protection, and the network cabinet adopts III-level lightning protection.
2) The lightning protection subsystem of the water platform (floating or pile type) is shown in fig. 5, and the lightning protection subsystem mainly comprises the following parts: the lightning protection device comprises a water platform lightning receiving device, a water platform body equipotential connection, a water platform electrical control cabinet lightning protection and equipotential connection, a water platform electrical device lightning protection and equipotential connection, and a converter lightning protection and equipotential connection.
Because the water platform is exposed on the sea surface, the lightning protection of the water platform mainly comprises two types: direct lightning and lightning electromagnetic pulse protection:
the protection of direct lightning mainly carries out the protection through setting up the lightning receiving device and the lightning arrester according to the spin method in the high point of different regions of platform, will meet simultaneously to flash or the lightning arrester passes through the earth conductor to realize the release of thunder electric current.
Lightning electromagnetic pulse protection is mainly realized by installing SPDs with different voltage classes, and different electrical components select the SPDs with different voltage classes according to different rated voltages.
3) The underwater lightning protection subsystem is shown in fig. 5, and the lightning protection of the part mainly comprises three parts: power lightning protection, signal lightning protection and equipotential grounding.
The lightning protection of the underwater part of the tidal current energy unit mainly aims at protecting lightning electromagnetic pulse from a power supply of the unit and conducting lightning current from seawater around the unit:
lightning electromagnetic pulse protection from a unit power supply is mainly achieved through SPDs of different voltage classes, and all electrical large components are provided with the SPDs of different voltage classes.
The conducted lightning current from the sea water is discharged mainly through an equipotential connection. The tidal current energy unit is a metal part connected together, the parts are connected by yellow-green wires or copper braids in an equipotential manner, and the equipotential connection is realized by cables at a relatively long distance, for example, the equipotential connection can be realized by a 120mm cable 2 The cable and the platform of the device are connected in an equipotential manner.
4) Equipotential grounds connect conductors or power protectors to reduce the potential difference created between them by lightning currents.
On the other hand, a tidal current energy unit is provided, and the lightning protection system of the tidal current energy unit is included.
Further, the lightning protection system of the tidal current energy unit is arranged on the basis of lightning protection area division results of the tidal current energy unit, wherein the lightning protection area division results are the results of dividing lightning protection areas of different grades of the tidal current energy unit by using a rolling ball method. The equipping situation can be referred to the above-described embodiments.
The invention provides a lightning protection system, which comprises an underwater lightning protection subsystem, a platform lightning protection subsystem and a grid-connected lightning protection subsystem, wherein the lightning protection system of a complete tidal current energy generator set is formed by the configuration of lightning protection equipment, namely SPD lightning arresters, lightning receiving devices, equipotential connection and a metal grounding grid in the three subsystems. According to the invention, the control signals, the power supply, the electrical components, the control system, the driving system and the grid-connected system of the tidal current energy generator set are subjected to targeted lightning protection at different levels, so that the safe and stable operation of the generator set under abnormal weather conditions is ensured. The lightning protection of the tidal current energy unit is mainly aimed at the lightning protection of power supplies and signals affecting the operation of the unit, the lightning protection of a platform is mainly aimed at the protection of equipment and related personnel on the platform, and the protection of the distributed grid-connected device comprises the protection of the grid-connected device and the lightning protection of matched buildings.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and some simple modifications, equivalent variations or modifications can be made by those skilled in the art using the teachings disclosed herein, which fall within the scope of the present invention.
Claims (8)
1. The lightning protection system of the tidal current energy unit comprises an underwater part of the tidal current energy unit, an upper platform part and a distributed grid-connected device part, and is characterized by comprising a metal grounding grid and three lightning protection subsystems which are connected with the metal grounding grid in a conducting manner, wherein the three lightning protection subsystems are respectively arranged on the underwater part of the tidal current energy unit, the upper platform part and the distributed grid-connected device part;
the platform lightning protection subsystem comprises a platform lightning receiving device, a platform SPD lightning arrester and a platform equipotential grounding conductor, wherein the platform lightning receiving device, the platform SPD lightning arrester and the platform equipotential grounding conductor are arranged on the water platform part, the platform SPD lightning arrester is used for being arranged on a signal system, a power supply and electric components of the water platform part, and the platform equipotential grounding conductor is used for being respectively arranged on all the components of the water platform part and connected through equipotential;
the grid-connected lightning protection subsystem comprises a shore-based lightning receiving device, a grid-connected SPD lightning arrester and a grid-connected equipotential grounding conductor, wherein the shore-based lightning receiving device, the grid-connected SPD lightning arrester and the grid-connected equipotential grounding conductor are installed on the distributed grid-connected device, the grid-connected SPD lightning arrester is used for being installed on a signal system, a power supply and electric components of the distributed grid-connected device, the grid-connected equipotential grounding conductor is used for being respectively arranged on all components of the distributed grid-connected device and connected with the metal grounding grid through equipotential, and the shore-based lightning receiving device is used for being installed on the distributed grid-connected device and connected with the metal grounding grid through equipotential;
the underwater lightning protection subsystem comprises an underwater SPD lightning arrester and an underwater equipotential grounding conductor, wherein the underwater SPD lightning arrester is arranged on the underwater part of the tidal current energy unit, the underwater SPD lightning arrester is arranged on a signal system, a power supply and an electric component of the underwater part of the tidal current energy unit, and the underwater equipotential grounding conductor is respectively arranged on all components of the underwater part of the tidal current energy unit and is connected through equipotential;
the three lightning protection subsystems are connected with the metal grounding network in a cable connection mode, and are connected with each other through cables in an equipotential manner;
the power protection of each part adopts double I-level lightning protection and equipotential grounding protection.
2. The lightning protection system of a tidal current energy unit of claim 1, further comprising overhead line protection and tiled cable protection for power protection of the sections.
3. The lightning protection system of the tidal current energy unit according to claim 1, wherein in the grid-connected lightning protection subsystem, the transformer and the grid-connected control cabinet adopt grade I lightning protection, the electrical cabinet adopts grade II lightning protection, and the network cabinet adopts grade III lightning protection.
4. A lightning protection system of a tidal current energy unit according to any one of claims 1 to 3, wherein the platform SPD lightning arrester of the platform lightning protection subsystem comprises a control cabinet SPD and a converter SPD mounted on the control cabinet and the converter;
the control cabinet SPD comprises a control cabinet power supply SPD and a control cabinet signal SPD.
5. A lightning protection system for a tidal current energy unit according to any one of claims 1 to 3, wherein the grid-connected SPD lightning arrester of the grid-connected lightning protection subsystem comprises a grid-connected control cabinet SPD, a transformer SPD and a signal SPD mounted on the grid-connected control cabinet and the transformer.
6. A lightning protection system for a tidal current energy unit according to any of claims 1 to 3, wherein the underwater SPD lightning arrester of the underwater lightning protection subsystem comprises a pitch system SPD, a tail tank SPD mounted on a pitch system and a tail tank;
the pitch system SPD comprises a pitch system power supply SPD and a pitch system signal SPD; the tail tank SPDs include a tail tank power supply SPD and a tail tank signal SPD.
7. A tidal current energy unit, characterized by comprising a lightning protection system of the tidal current energy unit of any of claims 1 to 6.
8. The tidal current energy unit according to claim 7, wherein the lightning protection system of the tidal current energy unit is set based on lightning protection area division results of the tidal current energy unit, wherein the lightning protection area division results are the results of dividing lightning protection areas of the tidal current energy unit into different levels by using a rolling ball method.
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| US7706117B2 (en) * | 2008-01-31 | 2010-04-27 | Wallace E Hall | Buoyant grounding terminal electrode apparatus for lightning protection |
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| CN204304222U (en) * | 2015-01-15 | 2015-04-29 | 成都星河科技产业有限公司 | The motor-driven portable lightning arrester of water floating type |
| WO2018041045A1 (en) * | 2016-08-30 | 2018-03-08 | 谭安民 | Lightning protection and/or static electricity prevention apparatus and method |
| CN208433740U (en) * | 2018-07-10 | 2019-01-25 | 国电联合动力技术有限公司 | A kind of lightning protection system of marine tidal-current energy unit and marine tidal-current energy unit including it |
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| CN108599084A (en) | 2018-09-28 |
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