A container ship partition power supply device

Abstract

The utility model relates to a kind of container ship partition power supply device in ship technology field, including the electric connection of generation module, high voltage distribution board module, first transformer module, low voltage distribution board module in proper order;Low voltage distribution board module includes two sets of low voltage distribution board, two sets of low voltage distribution board respectively correspond / supply the two independent parts of ship, and intercommunication line is equipped between two sets of low voltage distribution board, intercommunication line electrically connected two sets of low voltage distribution board, intercommunication switch two and intercommunication switch three are set on intercommunication line, and two sets of low voltage distribution board are independent of each other by opening intercommunication switch two or intercommunication switch three, and two sets of low voltage distribution board are electrically connected by closing intercommunication switch two and intercommunication switch three.To be suitable for different working conditions flexibly, the utilization of transformer is improved, power station redundancy is promoted, transformer capacity is reduced, shipbuilding cost is saved;It can be used flexibly, and the safety level of ship is improved.

Description

Technical Field

[0001] This utility model relates to the field of marine technology, specifically to a zoned power supply device for container ships. Background Technology

[0002] Container ships are primarily used for transporting containers. Medium and large container ships typically have over 1000 refrigerated containers and generally use AC 6.6kV high-voltage power supply systems. The ship's equipment is mostly AC 440V low-voltage systems. Therefore, they are usually equipped with one (one for operation, one for standby) high-voltage main transformer (AC 6.6kV / 450V step-down transformer) to supply the entire ship's load (referred to as "Hotel equipment") and several high-voltage refrigerated container transformers (AC 6.6kV / 450V step-down transformers) to supply the refrigerated container sockets. With the introduction of the dual-island power supply mode for ships, the power system is equipped with two high-voltage transformers to meet the needs of saving cables and operating under maximum load. However, to ensure that the ship's low-voltage equipment is powered, both high-voltage main transformers must be in operation under all circumstances.

[0003] The AC 6.6kV high-voltage power station system on medium and large container ships has main transformers 1 and 2 connected to opposite sides of the high-voltage switchboard. A step-down transformer (AC 6.6kV / 450V) feeds power to an AC 440V low-voltage switchboard, supplying power to the entire ship's load. Low-voltage side interlocking ensures one main transformer is in operation and one is on standby, meeting regulatory requirements. High-voltage loads are primarily side-push. The cold container transformer (AC 6.6kV / 450V) feeds power to the AC 440V cold container distribution board, which then supplies power to the cold container sub-distribution box, and finally to the cold container sockets. Generally, the main transformer capacity depends on the hotel equipment and the transformer load rate (related to the shipowner's requirements), while the cold container transformer capacity depends on the number of cold containers.

[0004] As dual-fuel container ships gain popularity among shipowners, medium and large container ships often adopt a twin-island configuration, with separate island superstructures and engine rooms located fore and aft to optimize loading capacity and efficiency. In twin-island configurations, refrigerated container capacity is maximized, and features such as bubble drag reduction, carbon capture, dual-fuel supply systems, and enhanced cargo hold fire suppression systems are incorporated, leading to a significant increase in power demand for hotel equipment. Furthermore, the selection of low-voltage side switches for high-voltage transformers is limited by a 6300A capacity, with single transformer configurations typically not exceeding 4500kVA. To save on cabling costs and in conjunction with the twin-island configuration, the power system is also undergoing transformation. Main transformers 1 and 3 (one in operation, one on standby), and main transformers 2 and 4 (one in operation, one on standby), are connected to opposite sides of the high-voltage distribution board and feed power to the next-level AC440V low-voltage distribution board, serving the equipment on the fore and aft islands respectively. Both high-voltage main transformers must be operational under all circumstances to ensure power supply to the low-voltage equipment on both the fore and aft islands.

[0005] Using the existing dual-island power supply mode, both high-voltage main transformers need to be in operation under any circumstances, resulting in an islanded mode on the low-voltage side. However, according to the power load calculation results, in many cases, such as navigation, port entry and exit, loading and unloading, and berthing, the power of the hotel equipment can be covered by a single transformer, and the probability of using a single transformer is very high. Utility Model Content

[0006] The purpose of this invention is to provide a zoned power supply device for container ships, which improves the utilization rate and redundancy of transformers. Especially in an environment where ship owners are paying more attention to the safety of ships and cargo, the flexible use of power stations directly enhances the safety level of ships.

[0007] The purpose of this utility model is achieved as follows: a container ship zoned power supply device, comprising a power generation module, a high-voltage distribution board module, a first transformer module, and a low-voltage distribution board module connected in sequence;

[0008] The low-voltage switchboard module includes two sets of low-voltage switchboards, which correspond to / power two independent parts of the ship respectively. A connecting line is provided between the two sets of low-voltage switchboards, which electrically connects the two sets of low-voltage switchboards. A second connecting switch and a third connecting switch are provided on the connecting line. Disconnecting the second connecting switch or the third connecting switch makes the two sets of low-voltage switchboards independent of each other, and closing the second connecting switch and the third connecting the two sets of low-voltage switchboards electrically.

[0009] Furthermore, the first transformer module includes four high-voltage main transformers, which are respectively installed on four switchable lines on the output side of the high-voltage distribution board module.

[0010] Furthermore, the four high-voltage main transformers are divided into two groups, with two transformers in each group. In each group, one of the two high-voltage main transformers is used as a spare and the other is used as a component. Each low-voltage switchboard corresponds to one group of high-voltage main transformers and two switchable lines on the output side of the high-voltage switchboard module.

[0011] Furthermore, when the second or third tie switch is disconnected, the two low-voltage switchboards become independent of each other, so that the two sets of high-voltage main transformers can be powered independently.

[0012] Furthermore, when the second and third tie switches are closed, the two low-voltage switchboards are electrically connected so that the two sets of high-voltage main transformers can operate in parallel.

[0013] Furthermore, the high-voltage distribution board module includes a first high-voltage distribution board and a second high-voltage distribution board, and also includes an intermediate connecting line and a connecting switch located on the intermediate connecting line, wherein the intermediate connecting line is electrically connected to the first high-voltage distribution board and the second high-voltage distribution board.

[0014] Furthermore, the power generation module includes several generators installed on the ship.

[0015] The beneficial effects of this utility model are as follows:

[0016] A connecting line is set up between the two low-voltage switchboards, and connecting switch two and connecting switch three are added to the connecting line between the two low-voltage switchboards. The two connecting switches can flexibly switch between simultaneous closing, separate closing or simultaneous disconnection modes, which can be flexibly applied to different working conditions, improve the utilization rate of transformers, increase the redundancy of power stations, reduce transformer capacity, and save shipbuilding costs; it can be used flexibly and improve the safety level of ships. Attached Figure Description

[0017] Figure 1 This is a system layout diagram of this utility model.

[0018] Figure 2 It is a conventional single-line power supply diagram in existing technology.

[0019] Figure 3 This is a single-line diagram of a dual-island power supply in existing technology.

[0020] Attached reference numerals: 1-Generator; 2-First high-voltage switchboard; 3-Second high-voltage switchboard; 4-Tie switch one; 5-High-voltage main transformer; 6-Low-voltage switchboard; 7-Low-voltage main transformer; 8-Tie switch two; 9-Tie switch three. Detailed Implementation

[0021] The following will refer to the appendix in the embodiments of this utility model. Figure 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Figure 2-3 The diagram illustrates the evolution of existing technologies, which is briefly described here to provide a deeper understanding of the inventive point. The details are explained below.

[0023] like Figure 2As shown, taking the AC6.6kV high-voltage power station system of a medium-to-large container ship as an example, main transformer one and main transformer two are respectively connected to the high-voltage switchboard on both sides. The step-down transformer AC6.6kV / 450V feeds power to the AC440V low-voltage switchboard, supplying power to the entire ship's load. The low-voltage side interlocks to ensure that the main transformers are used in a standby manner (one in operation and the other in standby), meeting the specifications. The high-voltage load is basically the ship's side thrust section. The cold box transformer AC6.6kV / 450V feeds power to the AC440V cold box distribution board, then supplies power to the cold box distribution box, and finally to the cold box socket. Generally, the capacity of the main transformer depends on the corresponding equipment and the transformer load rate (related to the shipowner's requirements), while the capacity of the cold box transformer depends on the number of cold boxes.

[0024] like Figure 3 As dual-fuel container ships gain popularity among shipowners, medium and large container ships are increasingly adopting a twin-island configuration. This configuration involves separate island superstructures and engine rooms on the hull, typically located aft and fore, optimizing loading capacity and efficiency. In twin-island configurations, refrigerated container capacity is maximized. Features such as bubble drag reduction, carbon capture, dual-fuel supply systems, and enhanced cargo hold fire suppression systems are also incorporated, leading to a significant increase in power demand for hotel equipment. Furthermore, the selection of low-voltage side switches for high-voltage transformers is limited by a 6300A switch capacity, with single transformer configurations generally not exceeding 4500kVA. To conserve cabling, the power system in twin-island configurations is also being improved. One example is a one-in-one-outstanding configuration. Figure 3 The "main transformer 1" and "main transformer 3" in the text are unified as Figure 1 The high-voltage main transformer 5 is one of the main transformers in operation, and another one-in-operation-one-standby combination is "main transformer 2" and "main transformer 4" (all uniformly named as follows). Figure 1 The high-voltage main transformer 5 in the middle is connected to the high-voltage distribution board (corresponding to Figure 1 The high-voltage distribution board 2 on the left and the high-voltage distribution board 3 on the right are connected to the next-level AC440V low-voltage distribution board (corresponding to the high-voltage distribution board 2 on the left and the high-voltage distribution board 3 on the right), and feed power to the next-level AC440V low-voltage distribution board (corresponding to the high-voltage distribution board 3 on the right). Figure 1 The low-voltage distribution board 6 in the middle supplies power to the equipment on the front island and the equipment on the rear island respectively. Under any circumstances, the two high-voltage main transformers 5 need to be put into operation to ensure that the low-voltage equipment on the front island and the rear island of the ship can be powered.

[0025] like Figure 1 As shown, the power supply device is configured as follows:

[0026] It includes:

[0027] A power generation module, comprising several generators 1 installed on the ship;

[0028] The high-voltage distribution board module is electrically connected to the power generation module. The high-voltage distribution board module includes a first high-voltage distribution board 2 and a second high-voltage distribution board 3. It is also provided with a connecting line and a connecting switch 4 on the connecting line. The connecting line is electrically connected to the first high-voltage distribution board 2 and the second high-voltage distribution board 3.

[0029] The first transformer module, which is set on the output line of the high-voltage distribution board module, includes four high-voltage main transformers 5. The four high-voltage main transformers 5 are respectively set on the four operable lines on the output side of the high-voltage distribution board module. In this embodiment, the four high-voltage main transformers 5 are divided into two groups, with two in each group. In each group of two high-voltage main transformers 5, one is used as a spare and the other is used as a component. Each low-voltage distribution board 6 corresponds to one group of high-voltage main transformers 5 and corresponds to the two operable lines on the output side of the high-voltage distribution board module. The output side of the high-voltage distribution board module also has other lines connected to the high-voltage load and other transformers.

[0030] The low-voltage switchboard module is electrically connected to the output line of the high-voltage switchboard module. It includes two sets of low-voltage switchboards 6, which correspond to / power two independent parts of the ship. Specifically, the two sets of low-voltage switchboards 6 correspond to the independent island superstructure and engine room on the ship. Each set of low-voltage switchboards 6 has a low-voltage main transformer 7 installed on its output line.

[0031] The connecting line is matched with the low-voltage distribution board module. The connecting line of the low-voltage distribution board module is electrically connected to two sets of low-voltage distribution boards 6. The connecting line is equipped with connecting switch 2 8 and connecting switch 3 9.

[0032] like Figure 1 As shown, the usage of tie switch 2 (8) and tie switch 3 (9) is as follows:

[0033] Disconnect either tie switch 2 (8) or tie switch 3 (9) to make the two low-voltage distribution boards 6 independent, and switch the entire power supply system to... Figure 3 The dual-island power supply mode allows for independent power supply from two sets of high-voltage main transformers, meeting the usage requirements of corresponding equipment under maximum load conditions.

[0034] Closing the two connecting switches 8 and 9 electrically connects the two low-voltage distribution boards 6 into a single unit, allowing the two high-voltage main transformers 5 to operate in parallel to supply the entire ship's load, suitable for use under different operating conditions.

[0035] like Figure 1 As shown, based on Figure 3Based on the scheme shown, tie switches 2 (8) and 3 (9) are added to the AC440V low-voltage distribution boards 6 on the front and rear islands, respectively. These are configured through the power management system (PMS) according to the actual power station load and the capacity of the high-voltage main transformer. When the conditions are met, the originally configured high-voltage main transformer 5 (i.e., Figure 1 In the transformers 1-4, only one high-voltage main transformer 5 is needed to supply power to the corresponding equipment, maximizing transformer redundancy. The traditional method requires two transformers, but with this solution, it is reduced to one transformer, resulting in significant energy savings.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In this utility model, it should also be noted that the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, integral molding connection, mechanical connection, or indirect connection through intermediate connecting parts. The specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A zoned power supply device for a container ship, characterized in that, It includes a power generation module, a high-voltage switchboard module, a first transformer module, and a low-voltage switchboard module that are connected in sequence. The low-voltage distribution board module includes two sets of low-voltage distribution boards (6), which correspond to two independent parts of the ship and supply power to the two independent parts of the ship respectively. A connecting line is provided between the two sets of low-voltage distribution boards (6), which electrically connects the two sets of low-voltage distribution boards (6). A second connecting switch (8) and a third connecting switch (9) are provided on the connecting line. Disconnecting the second connecting switch (8) or the third connecting switch (9) makes the two sets of low-voltage distribution boards (6) independent of each other, and closing the second connecting switch (8) and the third connecting switch (9) makes the two sets of low-voltage distribution boards (6) electrically connected.

2. A container ship zoned power supply device according to claim 1, characterized in that, The first transformer module includes four high-voltage main transformers (5), which are respectively installed on four switchable lines on the output side of the high-voltage distribution board module.

3. A container ship zoned power supply device according to claim 2, characterized in that, The four high-voltage main transformers (5) are divided into two groups, with two in each group. In each group of two high-voltage main transformers (5), one is used as a spare and the other is used as a component. Each set of low-voltage distribution board (6) corresponds to one set of high-voltage main transformers (5) and corresponds to two switchable lines on the output side of the high-voltage distribution board module.

4. A container ship zoned power supply device according to claim 3, characterized in that, When the second (8) or the third (9) tie switch is disconnected, the two low-voltage distribution boards (6) are independent of each other so that the two sets of high-voltage main transformers (5) are powered independently.

5. A container ship zoned power supply device according to claim 3, characterized in that, When the two connecting switches (8) and three connecting switches (9) are closed, the two low-voltage distribution boards (6) are electrically connected so that the two sets of high-voltage main transformers (5) can operate in parallel.

6. A container ship zoned power supply device according to any one of claims 1-5, characterized in that, The high-voltage distribution board module includes a first high-voltage distribution board (2) and a second high-voltage distribution board (3), and also includes an intermediate connecting line and a connecting switch (4) on the intermediate connecting line. The intermediate connecting line is electrically connected to the first high-voltage distribution board (2) and the second high-voltage distribution board (3).

7. A container ship zoned power supply device according to claim 6, characterized in that, The power generation module includes several generators (1) installed on the ship.

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