A high-capacity high-voltage shore power system

Abstract

The utility model discloses a kind of high-pressure shore power systems of large capacity, including the shore-based charging tower of being located in wharf, at least one shore power charging box of being located in ship side, the voltage of the shore power charging box is consistent with the voltage of the shore-based charging tower, the shore power charging box is electrically connected at least one shore power distribution board, each The shore power distribution board is connected with multiple shore power transformers in parallel, each The shore power transformer is connected with a direct current busbar respectively, each The direct current busbar is connected with an energy storage battery pack respectively;When ship is berthing charging, the shore power charging box is electrically connected with the shore-based charging tower.The high-pressure shore power system of large capacity of the utility model, by optimization design, ensure that ship can be charged before and after side, reasonable line design guarantees power transmission and safety, through direct current busbar connection ship distribution board system and energy storage group, improve the system redundancy.

Description

Technical Field

[0001] This utility model relates to the field of marine power technology, and in particular to a large-capacity high-voltage shore power system. Background Technology

[0002] With the continuous development of global shipping and trade, the number of ships calling at ports around the world has increased significantly. During berthing, to ensure the normal operation of onboard living facilities and machinery, ship generators need to operate for extended periods, which not only consumes a large amount of energy but also causes severe air and noise pollution in the port area. To reduce pollution and protect the environment, over the past decade, domestic and international ports have continuously increased the number of high-voltage shore power systems and improved their technology and energy storage capabilities. On an increasing number of large vessels, such as luxury cruise ships and high-end passenger roll-on / roll-off ships, ship owners have mandated the installation of high-voltage shore power systems. A typical shipboard high-voltage shore power system consists of a shore-side distribution cabinet, cable winches (including cable management systems), shore power socket boxes, shore power distribution cabinets, high-voltage transformers, frequency converter cabinets, and the ship's main switchboard. Previously, high-voltage shore power systems were generally ship-based fixed systems, with shore power cable winches located on the stern deck. The corresponding shore power sockets were then connected to the shore-side distribution cabinet for power supply. This method resulted in the cable winches occupying a significant amount of space on the ship, and the ship could only connect to shore power from one side. Utility Model Content

[0003] To address the aforementioned technical issues, this utility model provides a high-capacity high-voltage shore power system. Through customized shore-end charging towers, ship-end high-voltage shore power charging boxes, ship-end high-voltage distribution boards, shore power transformers, pre-magnetized transformers, DC busbars, and other equipment, and via a rational system connection, it transmits 15KV 67MVA high-voltage shore power to the ship-end power distribution system, meeting the charging needs of the ship's energy storage battery packs and providing normal power supply for daily loads. Optimized design ensures charging capabilities both before and after berthing, while a rational wiring design guarantees power transmission and safety. Connecting the ship's distribution board system and energy storage battery packs via DC busbars improves system redundancy.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A high-capacity, high-voltage shore power system includes a shore-based charging tower located at a wharf and at least one shore power charging box located on the side of a ship. The voltage of the shore power charging box is the same as that of the shore-based charging tower. The shore power charging box is electrically connected to at least one shore power distribution board. Each shore power distribution board is connected in parallel to multiple shore power transformers. Each shore power transformer is connected to a DC busbar. Each DC busbar is connected to an energy storage battery pack. The DC busbar is connected to the ship's energy management system via a communication interface. Under the ship's energy management system, the DC busbar replenishes the energy storage battery pack with energy. When the ship is docked for charging, the shore power charging box is electrically connected to the shore-based charging tower.

[0005] Furthermore, the system also includes at least one set of pre-magnetized transformers and pre-magnetized distribution boards, each pre-magnetized transformer being electrically connected to one of the shore power distribution boards, each pre-magnetized distribution board being electrically connected to one of the pre-magnetized transformers, each pre-magnetized transformer being electrically connected to multiple shore power transformers, and each set of pre-magnetized transformers and the pre-magnetized distribution boards being electrically connected to each other.

[0006] Furthermore, there are two shore power charging boxes, located on the port and starboard sides of the ship respectively; the shore power distribution boards connected to the two shore power charging boxes are electrically connected.

[0007] Furthermore, the multiple pre-charged magnet distribution boards are electrically connected to each other via a tie switch.

[0008] Furthermore, the shore power charging box has a total capacity of 67MVA. The shore power charging box is equipped with a plug positioning sensor and a wireless antenna device. The plug positioning sensor is used to ensure the positioning connection when the ship-end socket and the shore-end plug are connected. The wireless antenna device is used to meet the signal communication needs when the ship is connected to the shore.

[0009] Furthermore, multiple DC busbars are evenly distributed between the ship's four propulsion switchboards, matching the ship's four propulsion systems.

[0010] This utility model relates to a high-capacity, high-voltage shore power system designed for the power systems of large vessels such as luxury cruise ships and high-end passenger ro-ro ships. Through optimized equipment connections, it transmits 15KV 67MVA high-capacity shore power to the ship's power distribution system, meeting the charging needs of the ship's energy storage battery packs and providing normal power supply for daily loads. Optimized design ensures charging capabilities both before and after berthing, while a reasonable wiring design guarantees power transmission and safety. Multiple DC busbars connect the ship's switchboard system and energy storage units, improving system redundancy. Attached Figure Description

[0011] Figure 1This is a structural schematic diagram of the large-capacity high-voltage shore power system described in this utility model.

[0012] Among them, 1-shore power charging box, 2-shore power distribution board, 3-shore power transformer, 4-pre-magnetized transformer, 5-pre-magnetized distribution board, 6-DC busbar, 7-energy storage battery pack. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0014] like Figure 1 As shown, a high-capacity high-voltage shore power system includes a shore-based charging tower located at a dock and at least one shore power charging box 1 located on the side of a ship. The voltage of the shore power charging box 1 is the same as that of the shore-based charging tower. The shore power charging box 1 is electrically connected to at least one shore power distribution board 2. Each shore power distribution board 2 is connected in parallel to multiple shore power transformers 3. Each shore power transformer 3 is connected to a DC busbar 6. Each DC busbar 6 is connected to an energy storage battery pack 7. The DC busbar 6 is connected to the ship's energy management system through a communication interface. Under the ship's energy management system, the DC busbar 6 replenishes the energy storage battery pack 7 with energy. When the ship is docked for charging, the shore power charging box 1 is electrically connected to the shore-based charging tower.

[0015] In some embodiments, there are two shore power charging boxes 1, located on the port and starboard sides of the vessel, respectively; the shore power distribution boards 2 connected to the two shore power charging boxes 1 are electrically connected. Each shore power distribution board 2 is connected to four shore power transformers 3.

[0016] The shore power socket box has a voltage of 15KV, consistent with the voltage of the shore-end equipment, and a capacity of 67MVA. Two shore power distribution boards (2) are provided, with a voltage of AC15KV. Eight shore power transformers (3) are provided, with parameters of AC15KV / 800V / 800V / 8375kVA.

[0017] The shore power charging box 1 has a total capacity of 67MVA and is a customized product for ships. It includes specialized equipment such as a plug positioning sensor, a roller shutter door, and a wireless antenna. The plug positioning sensor ensures proper connection between the ship-side socket and the shore-side plug, while the wireless antenna facilitates signal communication during ship-shore connection. The shore power charging box is installed outdoors, with the roller shutter door closed during normal navigation and only opened when charging is required at the dock. By being positioned on both sides of the ship, it can meet the berthing needs of two passenger ro-ro ships. Large ships require large-capacity energy storage units, necessitating port consideration of short-term, high-power charging needs.

[0018] Large passenger ro-ro ships and cruise ships typically employ a dual-engine cabin configuration. Therefore, shore power distribution board 2, shore power transformer 3, and DC busbar 6 are all configured with dual redundancy to ensure the normal operation of the remaining equipment in the event of a single equipment failure. The high-voltage shore power transformer 3 has a large capacity, so its secondary winding also uses a dual-coil design, reducing transformer size while increasing output power redundancy.

[0019] Furthermore, the system also includes at least one set of pre-magnetized transformers 4 and pre-magnetized distribution boards 5, each of the pre-magnetized transformers 4 being electrically connected to one of the shore power distribution boards 2, the pre-magnetized distribution boards 5 being electrically connected to one of the pre-magnetized transformers 4, each of the pre-magnetized transformers 4 being electrically connected to multiple of the shore power transformers 3, and each set of pre-magnetized transformers 4 and the pre-magnetized distribution boards 5 being electrically connected to each other.

[0020] In some embodiments, two sets of pre-magnetized transformers 4 are provided, with parameters of AC15KV / 600V, 150kVA. Each of the pre-magnetized distribution boards 5 is connected to four shore power distribution boards 2. Two sets of pre-magnetized distribution boards 5 are provided, with a voltage of AC600V. Eight sets of DC distribution boards (6) are provided, with a voltage of DC1000V. The energy storage battery pack 7 has a voltage of DC900V and a capacity of 60MWh.

[0021] This utility model is designed for large-capacity shore power transformers 3. It includes an excitation transformer and an excitation distribution board. Before the high-voltage shore power system is started, it can reduce the large inrush current generated when closing the circuit and its impact on the power grid, avoid current-induced switch adjustments and voltage fluctuations, and improve system safety.

[0022] Normally, the two pre-charge magnetizing distribution boards are each responsible for their own tasks. However, in the event of a failure on one side of the pre-charge magnetizing distribution board, the two pre-charge magnetizing distribution boards can be electrically connected through a connecting switch to ensure charging of the battery on one side. This is an emergency measure in case of a failure.

[0023] Furthermore, multiple DC busbars 6 are evenly distributed between the ship's four propulsion switchboards, matching the ship's four propulsion systems. This ensures that even if one system fails, the other three propulsion systems can still operate, thus improving the redundancy of the entire ship's propulsion system.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-capacity high-voltage shore power system, characterized in that, The system includes a shore-based charging tower located at the dock and at least one shore power charging box located on the side of the ship. The voltage of the shore power charging box is the same as that of the shore-based charging tower. The shore power charging box is electrically connected to at least one shore power distribution board. Each shore power distribution board is connected in parallel to multiple shore power transformers. Each shore power transformer is connected to a DC busbar. Each DC busbar is connected to an energy storage battery pack. The DC busbar is connected to the ship's energy management system through a communication interface. Under the ship's energy management system, the DC busbar replenishes the energy storage battery pack with energy. When the ship is docked for charging, the shore power charging box is electrically connected to the shore-based charging tower.

2. The high-capacity high-voltage shore power system according to claim 1, characterized in that, The system further includes at least one set of pre-magnetized transformers and pre-magnetized distribution boards. Each pre-magnetized transformer is electrically connected to one of the shore power distribution boards. The pre-magnetized distribution board is electrically connected to one of the pre-magnetized transformers. Each pre-magnetized transformer is electrically connected to multiple shore power transformers. Each set of pre-magnetized transformers and the pre-magnetized distribution board are electrically connected to each other.

3. The high-capacity high-voltage shore power system according to claim 2, characterized in that, There are two shore power charging boxes, located on the port and starboard sides of the ship respectively; the shore power distribution boards connected to the two shore power charging boxes are electrically connected.

4. The high-capacity high-voltage shore power system according to claim 2, characterized in that, The multiple pre-charged magnetic distribution boards are electrically connected via a tie switch.

5. The high-capacity high-voltage shore power system according to claim 1, characterized in that, The shore power charging box has a total capacity of 67MVA. It is equipped with a plug positioning sensor and a wireless antenna device. The plug positioning sensor is used to ensure the positioning connection when the ship-end socket and the shore-end plug are connected. The wireless antenna device is used to meet the signal communication needs when the ship is connected to the shore.

6. The high-capacity high-voltage shore power system according to claim 3, characterized in that, Multiple DC busbars are distributed between the ship's four propulsion switchboards, matching the ship's four propulsion systems.

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