CN221263384U - Island group micro-grid system of ship with electricity conversion function - Google Patents
Island group micro-grid system of ship with electricity conversion function Download PDFInfo
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Abstract
The utility model discloses an island group micro-grid system of a power conversion ship, wherein an electric energy output end of an energy enrichment island generator set is connected into an energy enrichment island alternating-current grid through a first inverter, and a charge-discharge interface of a bidirectional charge-discharge device of the power conversion ship of the energy enrichment island is connected into the energy enrichment island alternating-current grid; the charge-discharge interface of the bidirectional charge-discharge device of the load demand island power-change ship is connected with the load demand island alternating-current power grid, and the electric energy input end of the load demand island alternating-current load is connected with the load demand island alternating-current power grid; the energy storage battery on the power conversion ship is connected into the energy enrichment island alternating current power grid through the energy enrichment island power conversion ship bidirectional charging and discharging device to be charged, and is connected into the load demand island alternating current power grid through the load demand island power conversion ship bidirectional charging and discharging device to supply power to the load demand island alternating current load. The utility model can improve the capacity of renewable energy sources of island groups and the reliability of load power supply.
Description
Technical Field
The utility model relates to the technical field of Micro power grids, in particular to an island group Micro power Grid (Micro-Grid) system of a ship with power conversion.
Background
Researchers in the industry develop and design various micro-grid systems, such as an island emergency power supply system and an emergency power supply method disclosed in China patent literature (publication number: CN108565855A, publication date: 09 month 21 of 2018), an island micro-grid system integrating ocean current energy power generation (publication number: CN110867957A, publication date: 3 month 6 of 2020), and the like, and the micro-grid systems can supply power to island group loads, but have higher requirements on a power distribution network due to special geographical conditions of the island group. The island group is far away from the continent, the cost of supplying power to the island group through the continent is extremely high, meanwhile, the ecological environment of the island group is fragile, the load supply electrode of the island group is easy to cause irreversible damage to the ecological environment of the island by using conventional energy, and the island group power supply is ensured by using ocean renewable resources to generate power. The island group comprises a plurality of islands, the renewable energy sources such as wind and light of each island in the island group have different intrinsic endowments, the functional positioning of different islands in the island group is different, the load types, the proportion and the capacity of different types of loads of each island are also different, and the renewable energy sources output of each island in the island group and the time sequence of the load are also different. The islands of the island group have larger water depth, and the cost is higher and the islands are easily influenced by severe ocean weather by erecting a large-span power transmission line or laying an optical cable.
Disclosure of Invention
The utility model aims to provide an island group micro-grid system of a ship with power conversion, which can improve the capability of absorbing renewable energy sources of the island group and the reliability of load power supply.
The island group micro-grid system comprises an energy enrichment island micro-grid system, a load demand island micro-grid system and a power conversion ship, wherein the energy enrichment island micro-grid system comprises an energy enrichment island power conversion ship bidirectional charging and discharging device, an energy enrichment island alternating current power grid, an energy enrichment island generator set and a first inverter, the electric energy output end of the energy enrichment island generator set is connected into the energy enrichment island alternating current power grid through the first inverter, and the charging and discharging interface of the energy enrichment island power conversion ship bidirectional charging and discharging device is connected into the energy enrichment island alternating current power grid;
The load demand island micro-grid system comprises a load demand island alternating-current power supply vessel bidirectional charge-discharge device, a load demand island alternating-current power supply vessel bidirectional charge-discharge device and a load demand island alternating-current load, wherein a charge-discharge interface of the load demand island alternating-current power supply vessel bidirectional charge-discharge device is connected with the load demand island alternating-current power supply vessel, and an electric energy input end of the load demand island alternating-current load is connected with the load demand island alternating-current power supply vessel;
The energy storage battery on the power conversion ship is used for being connected into the energy enrichment island alternating current power grid through the energy enrichment island power conversion ship bidirectional charging and discharging device to be charged, and the energy storage battery on the power conversion ship is also used for being connected into the load demand island alternating current power grid through the load demand island power conversion ship bidirectional charging and discharging device to supply power to the load demand island alternating current load.
The power-exchanging ship is an energy-storing/transporting dual-purpose full-electric propulsion ship driven by electric power and capable of loading a high-capacity battery energy-storing system, and the ship is reciprocated among islands in an island group according to a certain route, is charged by an electric energy resource enrichment island with rich renewable energy source power generation, and is discharged by a load demand island with higher load demand to supply electric energy for island load. In the process of charging the power conversion ship, the high-capacity load of the power conversion ship as the electric energy resource enrichment island improves the capacity of absorbing renewable energy sources of the electric energy resource enrichment island; when the high-capacity battery energy storage system on the power conversion ship finishes charging, the power conversion ship stops to a load demand island with higher load demand, and electric energy is supplied to the load of the load demand island through the bidirectional charging device of the power conversion ship; in the discharging process of the power conversion ship, the power conversion ship is used as a standby power supply of renewable energy sources of the load demand island, so that the power supply reliability of the load demand island is improved. The utility model uses the electricity-exchanging ship to ensure the balance of electric energy supply and demand among different islands in the island group. The constructed island group high-permeability micro-grid system has the characteristics of high level of the capability of absorbing renewable energy and high power supply reliability.
The utility model has the beneficial effects that:
1. The pure electric power driven power conversion ship is selected as a carrier for electric energy storage of the island group micro-grid system, so that the ship can conveniently and flexibly come and go to each island of the island group without being limited by sea water depth among the islands, navigation time and navigation route can be flexibly arranged to avoid complex sea conditions, the integral reasonable utilization of standby capacity of the island group micro-grid system can be realized, the load demands of the islands with rich electric energy resources and load demands can be coordinated, the renewable energy power generation resources of the island group can be utilized to the maximum extent, and the power supply reliability of the island group micro-grid system can be improved;
2. The island group micro-grid system comprises one or more of a photovoltaic generator set, a wind generator set, a wave generator set and a tidal generator set, so that the island group micro-grid system can adapt to various landform characteristics and islands with renewable energy endowments, and has strong universality and practicability;
3. The high-capacity energy storage battery pack adopted by the power conversion ship has higher energy density and safety. The electric energy is transported by the power conversion ship, so that the utilization of renewable energy sources by the electric energy resource enrichment island is not limited by the load of the power transmission system and the island, the absorption level of the renewable energy sources of the island group micro-grid system is enhanced, meanwhile, the power supply guarantee of the load demand island is not limited by the power generation capacity of the renewable energy sources of the island, and the power supply reliability of the island group micro-grid system is enhanced;
4. Besides new construction, the power conversion ship access points of the islands of the island group can be upgraded, reformed or expanded by utilizing the existing offshore substations or booster stations of the islands so as to fully utilize the residual capacity of the substations, fully utilize the stock resources and realize the maximum effective utilization of island land resources.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
The system comprises a 1-energy enrichment island micro-grid system, a 1.1-energy enrichment island power conversion ship bidirectional charge and discharge device, a 1.2-energy enrichment island alternating current grid, a 1.3-energy enrichment island generator set, a 1.4-first inverter, a 1.5-energy enrichment island direct current grid, a 1.6-first direct current grid-connected device, a 1.7-first alternating current and direct current grid interconnection device, a 1.8-energy enrichment island alternating current load, a 1.9-energy enrichment island direct current load, a 2-load demand island micro-grid system, a 2.1-load demand island power conversion ship bidirectional charge and discharge device, a 2.2-load demand island alternating current grid, a 2.3-load demand island alternating current load, a 2.4-load demand island generator set, a 2.5-second inverter, a 2.6-load demand island direct current grid, a 2.7-load demand island direct current load, a 2.8-second alternating current and direct current grid-connected device, a 2.9-load demand island direct current grid-connected device and a 2.3-load grid-connected device.
Detailed Description
The utility model is described in further detail below with reference to the attached drawings and specific examples:
The island group micro-grid system with the power conversion ship comprises an energy enrichment island micro-grid system 1, a load demand island micro-grid system 2 and a power conversion ship 3, wherein the energy enrichment island micro-grid system 1 comprises an energy enrichment island power conversion ship bidirectional charge and discharge device 1.1, an energy enrichment island alternating current grid 1.2, an energy enrichment island generator set 1.3 and a first inverter 1.4, an electric energy output end of the energy enrichment island generator set 1.3 is connected into the energy enrichment island alternating current grid 1.2 through the first inverter 1.4, and a charge and discharge interface of the energy enrichment island power conversion ship bidirectional charge and discharge device 1.1 is connected into the energy enrichment island alternating current grid 1.2;
the load demand island micro-grid system 2 comprises a load demand island alternating-current power grid 2.1, a load demand island alternating-current power grid 2.2 and a load demand island alternating-current load 2.3, wherein a charge-discharge interface of the load demand island alternating-current power grid 2.2 is connected with a charge-discharge interface of the load demand island alternating-current power grid 2.1, and an electric energy input end of the load demand island alternating-current power grid 2.3 is connected with the load demand island alternating-current power grid 2.2;
The energy storage battery pack 3.1 on the power conversion ship 3 is used for being connected into the energy enrichment island alternating current power grid 1.2 through the energy enrichment island power conversion ship bidirectional charge and discharge device 1.1 to receive the charge of the energy enrichment island generator set 1.3, and the energy storage battery pack 3.1 on the power conversion ship 3 is also used for being connected into the load demand island alternating current power grid 2.2 through the load demand island power conversion ship bidirectional charge and discharge device 2.1 to supply power to the load demand island alternating current load 2.3.
In the above technical scheme, the energy storage battery pack 3.1 of the power conversion ship 3 has the functions of charging and discharging and storing electric energy.
In the above technical scheme, the energy enrichment island micro-grid system 1 further includes an energy enrichment island direct-current grid 1.5, a first direct-current grid-connected device 1.6 and a first alternating-current and direct-current grid interconnection device 1.7, the electric energy output end of the energy enrichment island generator set 1.3 is connected to the energy enrichment island direct-current grid 1.5 through the first direct-current grid-connected device 1.6, and the energy enrichment island direct-current grid 1.5 is connected to the energy enrichment island alternating-current grid 1.2 through the first alternating-current and direct-current grid interconnection device 1.7.
In the above technical scheme, the energy enrichment island micro-grid system 1 further comprises an energy enrichment island ac load 1.8, and the electric energy input end of the energy enrichment island ac load 1.8 is connected to the energy enrichment island ac grid 1.2.
In the above technical scheme, the energy enrichment island micro-grid system 1 further includes an energy enrichment island dc load 1.9, and an electric energy input end of the energy enrichment island dc load 1.9 is connected to the energy enrichment island dc grid 1.5. The design realizes the interconnection of the direct current power grid and the alternating current power grid in the energy enrichment island micro-grid system 1, and expands the application function of the energy enrichment island micro-grid system. The energy enrichment island is provided with a generator set, a direct current power grid, an alternating current power grid, a direct current load and an alternating current load at the same time, so that a complete island power supply and electricity utilization environment is formed.
In the above technical solution, the load demand island micro-grid system 2 further includes a load demand island generator set 2.4 and a second inverter 2.5, and an electric energy output end of the load demand island generator set 2.4 is connected to the load demand island ac grid 2.2 through the second inverter 2.5.
In the above technical solution, the load demand island micro-grid system 2 further includes a load demand island dc grid 2.6, a load demand island dc load 2.7, and a second ac/dc grid interconnection device 2.8, where the load demand island dc grid 2.6 is connected to the load demand island ac grid 2.2 through the second ac/dc grid interconnection device 2.8, and an electric energy input end of the load demand island dc load 2.7 is connected to the load demand island dc grid 2.6.
In the above technical solution, the load demand island micro-grid system 2 further includes a second dc grid-connected device 2.9, and the load demand island generator set 2.4 is connected to the load demand island dc grid 2.6 through the second dc grid-connected device 2.9. The design realizes the interconnection of the direct current power grid and the alternating current power grid in the load demand island micro-grid system 2, and expands the application function of the load demand island micro-grid system. The generator set of the island with the load demand can also provide partial electric energy, and the island power supply and electricity utilization environment is formed by the generator set, the direct current power grid, the alternating current power grid, the direct current load and the alternating current load.
In the above technical solution, the energy enrichment island micro-grid system 1 is a micro-grid system erected on an electric energy enrichment island in the island group, and the load demand island micro-grid system 2 is a micro-grid system erected on a load demand island in the island group. When the total load (including direct current load and alternating current load) on the island is larger than the available capacity of the generator set (including a wave generator set, a tidal sand generator set, a wind generator set and a photovoltaic generator set), the island is a load demand island. Conversely, the islands are electric energy resource-enriched islands.
In the above technical scheme, the energy enrichment island generator set 1.3 comprises a wave generator and/or a tidal generator and/or a wind power generator and/or a photovoltaic generator.
The load demand island genset 2.4 comprises a wave generator and/or a tidal generator and/or a wind generator and/or a photovoltaic generator.
In the embodiment, the bidirectional charging and discharging device of the power conversion ship is SXCY-600kW in model number, the inverter is SUNGG-185 in model number, the energy storage battery pack is 84527630-30AH in model number, the direct current grid-connected device is ST630PL in model number, and the alternating current and direct current grid interconnection device is OPAT.
The working process of the utility model is as follows: the power conversion ship 3 sails to a power conversion ship access point of an electric energy resource enrichment island of the island group, and an energy storage battery pack 3.1 of the power conversion ship 3 is accessed into an energy enrichment island alternating current power grid 1.2 through an energy enrichment island power conversion ship bidirectional charging and discharging device 1.1 to receive charging of an energy enrichment island generator set 1.3. After the energy storage battery pack 3.1 of the power conversion ship 3 is charged, the power conversion ship 3 sails to a power conversion ship access point of a load demand island of an island group, and the energy storage battery pack 3.1 on the power conversion ship 3 is accessed into the load demand island alternating current load 2.3 and the load demand island direct current load 2.7 in the load demand island alternating current power grid 2.2 through the load demand island bidirectional charging and discharging device 2.1 to supply power.
The utility model can be applied to island group micro-grid power supply in the sea or large-scale lake.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (10)
1. An island group micro-grid system comprising a power conversion ship is characterized in that: the energy enrichment island micro-grid system (1) comprises an energy enrichment island micro-grid system (1), a load demand island micro-grid system (2) and a power conversion ship (3), wherein the energy enrichment island micro-grid system (1) comprises an energy enrichment island power conversion ship bidirectional charging and discharging device (1.1), an energy enrichment island alternating current power grid (1.2), an energy enrichment island generator set (1.3) and a first inverter (1.4), the electric energy output end of the energy enrichment island generator set (1.3) is connected into the energy enrichment island alternating current power grid (1.2) through the first inverter (1.4), and the charging and discharging interface of the energy enrichment island power conversion ship bidirectional charging and discharging device (1.1) is connected into the energy enrichment island alternating current power grid (1.2);
the load demand island micro-grid system (2) comprises a load demand island alternating-current power grid (2.1), a load demand island alternating-current power grid (2.2) and a load demand island alternating-current load (2.3), wherein a charge-discharge interface of the load demand island alternating-current power grid (2.2) is connected with a charge-discharge interface of the load demand island alternating-current power grid (2.1), and an electric energy input end of the load demand island alternating-current power grid (2.3) is connected with the load demand island alternating-current power grid (2.2);
The energy storage battery pack (3.1) on the power conversion ship (3) is used for being connected into the energy enrichment island alternating current power grid (1.2) through the energy enrichment island power conversion ship bidirectional charging and discharging device (1.1) to receive charging, and the energy storage battery pack (3.1) on the power conversion ship (3) is also used for being connected into the load demand island alternating current power grid (2.2) through the load demand island power conversion ship bidirectional charging and discharging device (2.1) to supply power to the load demand island alternating current load (2.3).
2. The island group microgrid system of a power-conversion vessel according to claim 1, wherein: the energy enrichment island micro-grid system (1) further comprises an energy enrichment island direct-current grid (1.5), a first direct-current grid-connected device (1.6) and a first alternating-current and direct-current grid interconnection device (1.7), the electric energy output end of the energy enrichment island generator set (1.3) is connected into the energy enrichment island direct-current grid (1.5) through the first direct-current grid-connected device (1.6), and the energy enrichment island direct-current grid (1.5) is connected into the energy enrichment island alternating-current grid (1.2) through the first alternating-current and direct-current grid interconnection device (1.7).
3. Island group microgrid system of a vessel comprising a power conversion according to claim 1 or 2, characterized in that: the energy enrichment island micro-grid system (1) further comprises an energy enrichment island alternating current load (1.8), and an electric energy input end of the energy enrichment island alternating current load (1.8) is connected into the energy enrichment island alternating current grid (1.2).
4. The island group microgrid system of a power-conversion vessel according to claim 2, characterized in that: the energy enrichment island micro-grid system (1) further comprises an energy enrichment island direct current load (1.9), and an electric energy input end of the energy enrichment island direct current load (1.9) is connected to the energy enrichment island direct current grid (1.5).
5. The island group microgrid system of a power-conversion vessel according to claim 1, wherein: the load demand island micro-grid system (2) further comprises a load demand island generator set (2.4) and a second inverter (2.5), and the electric energy output end of the load demand island generator set (2.4) is connected into the load demand island alternating-current grid (2.2) through the second inverter (2.5).
6. The island group microgrid system of a power-conversion vessel according to claim 1 or 5, characterized in that: the load demand island micro-grid system (2) further comprises a load demand island direct-current grid (2.6), a load demand island direct-current load (2.7) and a second alternating-current/direct-current grid interconnection device (2.8), wherein the load demand island direct-current grid (2.6) is connected into the load demand island alternating-current grid (2.2) through the second alternating-current/direct-current grid interconnection device (2.8), and the electric energy input end of the load demand island direct-current load (2.7) is connected into the load demand island direct-current grid (2.6).
7. The island group microgrid system of a power-conversion vessel of claim 6, wherein: the load demand island micro-grid system (2) further comprises a second direct-current grid-connected device (2.9), and the load demand island generator set (2.4) is connected into the load demand island direct-current grid (2.6) through the second direct-current grid-connected device (2.9).
8. The island group microgrid system of a power-conversion vessel according to claim 1, wherein: the energy enrichment island micro-grid system (1) is a micro-grid system erected on an electric energy enrichment island in an island group, and the load demand island micro-grid system (2) is a micro-grid system erected on a load demand island in the island group.
9. The island group microgrid system of a power-conversion vessel according to claim 1, wherein: the energy enrichment island generator set (1.3) comprises a wave generator and/or a tidal generator and/or a wind generator and/or a photovoltaic generator.
10. The island group microgrid system of a power-conversion vessel of claim 5, wherein: the load demand island generator set (2.4) comprises a wave generator and/or a tidal generator and/or a wind generator and/or a photovoltaic generator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322971194.7U CN221263384U (en) | 2023-11-03 | 2023-11-03 | Island group micro-grid system of ship with electricity conversion function |
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| CN202322971194.7U CN221263384U (en) | 2023-11-03 | 2023-11-03 | Island group micro-grid system of ship with electricity conversion function |
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