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CN-121983998-A - Double-power-station ship comprehensive power system containing micro-grid

CN121983998ACN 121983998 ACN121983998 ACN 121983998ACN-121983998-A

Abstract

The invention relates to a double-power-station ship comprehensive power system comprising a micro-grid, wherein a front main power station and a rear main power station are arranged on a ship, the front main power station and the rear main power station are respectively provided with a medium-voltage main distribution board, rated voltage of the medium-voltage main distribution board is AC6.6kV, the medium-voltage main power station and the rear main power station are used for supplying power to an electric propulsion device, a side-pushing motor and a lower auxiliary power grid, the auxiliary power grid comprises two voltage levels of AC400V and AC230V, the medium-voltage main distribution board is subjected to voltage reduction through an AC6.6kV/AC400V transformer and then supplies power, the micro-grid comprises an AC400V and AC230V two-stage distribution system, the micro-grid distribution board, a public connection point PCC, a wind power generation device, a photovoltaic generation device, a bidirectional energy storage system and an AC400V/AC230V transformer are arranged, the micro-grid is in grid-connected operation with the auxiliary power grid under normal working conditions, and operation mode switching is realized when the main power station or the micro-grid fails. The invention provides a double-power-station ship comprehensive power system framework containing a micro-grid and an operation mode thereof, and realizes the coordinated operation of the double-power-station comprehensive power system and the micro-grid.

Inventors

  • QIU BIN
  • CHEN ZHAOYUN
  • ZHANG WENFENG
  • ZHOU XIANGRONG
  • LU BEN
  • CAO JIE

Assignees

  • 中国船舶集团有限公司第七〇四研究所

Dates

Publication Date
20260505
Application Date
20260126

Claims (8)

  1. 1. A double-power-station ship comprehensive power system containing a micro-grid is characterized by comprising a front main power station and a rear main power station which are arranged on a ship, wherein the front main power station and the rear main power station are respectively internally provided with main diesel generating sets with the same number and the same type, each of the front main power station and the rear main power station is provided with a medium-voltage main distribution board with rated voltage of AC6.6kV and used for supplying power to an electric propulsion device, a side-pushing motor and a lower auxiliary power grid, the AC6.6kV busbar of the front main distribution board and the rear main distribution board are connected through a jumper wire, the auxiliary power grid comprises AC400V and AC230V voltage levels, the medium-voltage main distribution board is subjected to voltage reduction through an AC6.6kV/AC400V transformer, the AC400V busbar of the front main distribution board and the rear main distribution board is also connected through a jumper wire, the micro-grid comprises an AC400V and AC230V two-stage distribution system, a micro-grid distribution board, a public connection point PCC, a wind power generation device, a photovoltaic generation device, a bidirectional energy storage system and an AC400V/AC230V transformer are arranged in the micro-grid, and the micro-grid is connected with the main power grid through the jumper wire when the micro-grid is in a normal operation mode under the condition of the emergency power grid or the emergency power grid, and the micro-grid is connected with the main grid through the jumper wire, and the AC400V transformer is connected with the main grid, and the main grid is connected with the auxiliary grid under the normal operation mode.
  2. 2. The micro-grid-containing double-station ship integrated power system according to claim 1, wherein the wind power generation device is a drum type wind turbine, and the photovoltaic power generation device adopts a flexible film photovoltaic assembly and is installed below the outer side wall of a ship body or a balcony of a passenger cabin.
  3. 3. The micro-grid-containing double-station ship integrated power system according to claim 1, wherein the bidirectional energy storage system comprises a lithium iron phosphate storage battery with a rated voltage of DC560V and a matched bidirectional fast converter, and the bidirectional fast converter is used for stabilizing micro-grid power fluctuation and maintaining AC400V busbar voltage dynamic stability.
  4. 4. The micro-grid-containing double-station ship integrated power system according to claim 1, wherein the AC400V busbar of the micro-grid distribution board is divided into three sections by a disconnecting switch for being connected to a wind power generation device, a load and energy storage system and a photovoltaic power generation device respectively.
  5. 5. The micro-grid-containing double-station ship integrated power system according to claim 1, wherein the auxiliary power grid side of the rear main power station is further provided with a berthing and emergency diesel generator set which is started when the power supply of the main power station fails and runs in parallel with the micro-grid through an emergency distribution board and PCC.
  6. 6. The micro-grid-containing double-station ship comprehensive power system according to claim 1 is characterized in that the system executes different operation strategies according to ship operation conditions, wherein the conditions comprise in-out port, night voyage, cruise entertainment, maximum voyage, night anchoring, dock berthing and emergency conditions, and under different conditions, the starting and stopping number of main generator sets, the operation state of a wind-solar power generation device, the micro-grid parallel/off-grid state and the operation mode of an energy storage system are adjusted accordingly.
  7. 7. The micro-grid-containing dual-station ship integrated power system according to claim 6, wherein the system is powered by shore power in a dock berthing condition, and the PCC is immediately disconnected, the operation of the wind-solar power generation and energy storage system is stopped, and the system is switched to a main power station or a front main switchboard to supply power to an AC230V important load in an emergency condition that the micro-grid power supply fails.
  8. 8. The micro-grid-containing dual-station marine integrated power system of claim 1, wherein the AC6.6kv/AC400V daily transformers are standby between the front and rear stations and are operated in open loop through breaker interlock logic.

Description

Double-power-station ship comprehensive power system containing micro-grid Technical Field The invention relates to the technical field of ship power systems, in particular to a double-power-station ship comprehensive power system with a micro-grid. Background The large-sized mail wheel is used as one of the marks of the international high-end ship manufacturing capacity, can strongly pull the cooperative development of travel consumption and an industrial chain, and has important industrial value and economic value. In recent years, along with the remarkable improvement of comprehensive national force and shipbuilding technology in China, large ocean-going luxury wheels are also built in China, the blank of related industries is filled, more large wheels with more advanced technology are built in the future. Large ocean-going luxury cruise ships generate huge fuel consumption and greenhouse gas emission every day during operation, and if a new technology can be adopted to reduce the consumption of petrochemical energy of the ships, the large ocean-going luxury cruise ships have remarkable significance for the technical development of the cruise ship industry in China. On the other hand, in order to improve comfort and vitality, future large ocean-going luxury wheels tend to employ multi-station integrated power systems. Disclosure of Invention Aiming at the application problem of the offshore new energy power generation technology in a large ocean luxury cruise integrated power system, the double-power-station ship integrated power system with the micro-grid is provided, the advantages of large-scale carrying of the offshore new energy power generation device on a large cruise platform are fully exerted, and the coordinated operation of the double-power-station integrated power system and the micro-grid is realized. The technical scheme of the invention is that the double-power-station ship comprehensive power system with the micro-grid comprises: The ship comprises a front main power station and a rear main power station which are arranged on the ship, wherein the front main power station and the rear main power station are respectively internally provided with the same number and type of main diesel generating sets; The front main power station and the rear main power station are respectively provided with a medium-voltage main distribution board, the rated voltage of which is AC6.6kV, and the medium-voltage main distribution boards are used for supplying power to the electric propulsion device, the side-pushing motor and the lower auxiliary power grid; the AC6.6kV busbar of the front main distribution board and the rear main distribution board are connected through a jumper wire; The auxiliary power grid comprises two voltage levels of AC400V and AC230V, the medium-voltage main switchboard supplies power after being reduced by an AC6.6kV/AC400V transformer, and the AC400V busbar of the front main switchboard and the AC400V busbar of the rear main switchboard are also connected through a jumper wire; the micro-grid comprises an AC400V and AC230V two-stage power distribution system, and is provided with a micro-grid power distribution board, a public connection point PCC, a wind power generation device, a photovoltaic power generation device, a bidirectional energy storage system and an AC400V/AC230V transformer; the micro-grid is connected with an AC400V busbar of the emergency distribution board through the public connection point PCC and is connected with an AC230V busbar of the front main distribution board through a jumper wire to serve as a standby power supply branch; and the micro-grid is in grid-connected operation with the auxiliary power grid under the normal working condition, and the operation mode switching is realized when the main power station or the micro-grid fails. Preferably, the wind power generation device is a rotary drum type wind power machine, and the photovoltaic power generation device adopts a flexible film photovoltaic assembly and is arranged on the outer side wall of the ship body or below a balcony of a passenger cabin. Preferably, the bidirectional energy storage system comprises a lithium iron phosphate storage battery with a rated voltage of DC560V and a matched bidirectional rapid current transformer, and is used for stabilizing the power fluctuation of the micro-grid and maintaining the dynamic stability of the AC400V busbar voltage. Preferably, the AC400V busbar of the micro-grid distribution board is divided into three sections by an isolating switch and is respectively used for being connected into a wind power generation device, a load, an energy storage system and a photovoltaic power generation device. Preferably, the auxiliary power grid side of the rear main power station is also provided with a parking and emergency diesel generator set, and the unit is started when the power supply of the main power station fails and runs in parallel with the micro-grid thr