Power supply system based on distributed busbar and ship power system

Abstract

The utility model discloses a power supply system based on a distributed busbar and a ship electric power system, which can realize one-to-one correspondence between a battery pack and a direct current load and reduce fault risks. Comprising a plurality of mutually independent battery packs, a plurality of switches and a plurality of busbar groups, n non-crossed busbars are arranged in each busbar group, each busbar is provided with at least one load connection point for connecting a load, each busbar group is connected to at least n battery packs, each battery pack is respectively connected to the n busbars in the corresponding busbar group through n branches, and each branch is provided with a switch. The distributed direct-current power system adopts a modular design concept, and functions of power generation, energy storage, control and the like are dispersed into a plurality of relatively independent subsystems or modules. Therefore, the fault risk is effectively dispersed, and the reliability of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ship electrical technology, and concretely relates to a power supply system based on distributed busbar and ship power system. BACKGROUND

[0002] In the ship, various different DC power sources (such as diesel generator, solar panel, fuel cell, storage battery, etc.) and numerous DC loads (such as propulsion motor, deck machinery, cabin equipment, etc.) connected to the system are connected together to form a unified DC power transmission and distribution network.

[0003] When different power sources are connected to the busbar, their output characteristics are different (for example, the output voltage of the diesel generator will change with the load, and the charge and discharge state of the storage battery will also affect the busbar voltage, etc.), and the power demand of numerous loads is also dynamically changing when they obtain power from the busbar. Therefore, it is relatively complex to maintain the busbar voltage at a stable and appropriate level in the common DC busbar system. SUMMARY

[0004] The utility model aims at providing a power supply system based on distributed busbar and ship power system, which can realize one-to-one correspondence between battery pack and DC load and reduce the risk of failure.

[0005] In the first aspect, the utility model provides a power supply system based on distributed busbar, which comprises a plurality of independent battery packs, a plurality of switches and a plurality of busbar groups.

[0006] Each busbar group is provided with n non-crossing busbars, each busbar is provided with at least one load connection point for connecting the load, and each busbar group is connected to at least n battery packs, and n is an integer greater than or equal to 2.

[0007] Each battery pack is connected to the corresponding n busbars in the busbar group through n branches, and a switch is arranged on each branch.

[0008] In the optional implementation, all the busbars are arranged in parallel.

[0009] In the optional implementation, the busbars between the adjacent two busbar groups are one-to-one connected, and a switch is arranged at the connection for controlling the on-off.

[0010] In the optional implementation, it further comprises two DC bus connection cabinets, and each DC bus connection cabinet is provided with a busbar group.

[0011] In the optional implementation, it further comprises a DC fast charging shore power box, and the DC fast charging shore power box is provided with two output ends connected to the busbars in the two DC bus connection cabinets.

[0012] In an optional embodiment, a controller is further included, the switch is a DC contactor, and the controller controls the on-off of the DC contactor to control the on-off of the battery pack and the bus.

[0013] In a second aspect, the utility model provides a kind of ship power system, using the power supply system based on distributed busbar of any preceding embodiment, further include multiple load groups, each load group is accessed in one busbar group, each load group contains n load branch, load branch and the busbar in corresponding busbar group are connected one by one.

[0014] According to the ship power system of preceding embodiment, load group and busbar group are two groups, and the main propulsion motor and inverter are contained in two load groups, and the inverter is used to convert direct current into alternating current, and the main propulsion motor is used to drive ship navigation.

[0015] In an optional embodiment, in two busbar groups, the two busbars connected with main propulsion motor of ship are electrically connected.

[0016] In an optional embodiment, ship side propulsion motor is arranged in at least one load group for lateral propulsion of ship.

[0017] The utility model embodiment has the beneficial effects that: the distributed DC power system of the utility model adopts modular design concept, and the functions such as power generation, energy storage and control are dispersed to multiple relatively independent subsystems or modules.For example, in ship application, there can be multiple distributed DC generators or power modules distributed in different positions.When one of the modules fails, such as a DC generator fails, since other modules can still operate normally, the overall power supply of the system will not be completely interrupted, only the corresponding power supply capacity decreases, thereby effectively dispersing the fault risk and improving the reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The power supply system circuit schematic diagram based on distributed busbar provided by the utility model embodiment is provided.

[0019] Figure 2 The circuit schematic diagram of ship power system provided by the utility model embodiment is provided. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the common meanings understood by those of ordinary skill in the art to which the present application belongs. The terms "first", "second", and similar terms used in the present application do not represent any order, number, or importance, but are only used to distinguish different components. The terms "include", "contain", and similar terms mean that the components or objects before the terms encompass the components or objects listed after the terms and their equivalents, but do not exclude other components or objects. The terms "connect", "couple", or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to represent relative positional relationships, which can change accordingly when the absolute positions of the described objects change.

[0021] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not intended to limit the present application. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0022] Figure 1 The circuit schematic diagram of the power supply system based on the distributed busbar is provided for the embodiments of the present application. In the present embodiment, two busbar groups are taken as an example, and three busbars are arranged in each busbar group. The power supply system includes six independent battery groups and two busbar groups. Three parallel busbars are arranged in each busbar group. The first busbar group is provided with a first busbar, a second busbar, and a third busbar, and the second busbar group is provided with a fourth busbar, a fifth busbar, and a sixth busbar.

[0023] Each busbar is provided with a load connection point for connecting a load, and each busbar group is connected to three battery groups. The battery groups can be batteries of diesel generators, solar panels, fuel cells, storage batteries, etc.

[0024] Each battery group is connected to the three busbars in the corresponding busbar group through three branches, and a switch is arranged on each branch. The switch is a direct current contactor, and the controller controls the on-off of the direct current contactor to control the on-off of the battery group and the busbar.

[0025] The two busbar groups adjacent to each other are one-to-one electrically connected, and a switch is arranged at the connection position for controlling the on-off.

[0026] The distributed direct current power system adopts a modular design concept, and disperses functions such as power generation, energy storage and control into multiple relatively independent subsystems or modules.

[0027] In addition, the busbars in the adjacent busbar groups are connected through the switches, so that the application scenarios can be more diversified, and when a certain battery group fails, a battery group in another busbar group can be introduced.

[0028] The utility model discloses two direct current confluence cabinets are still set up, be right direct current confluence cabinet and right direct current confluence cabinet respectively, and one busbar group is arranged in each direct current confluence cabinet.

[0029] Corresponding to the display assembly, the utility model embodiment still provides a kind of ship power system, as shown in Figure Figure 2 It uses the power supply system based on distributed busbar described above. It also includes two load groups, each load group is connected to a busbar group. Each load group includes three load branches, and the load branches are one-to-one connected to the busbars in the corresponding busbar group.

[0030] The load branches of the first load group are the first load branch, the second load branch and the third load branch. The first load branch is connected to the first busbar, which includes a main propulsion motor and a control circuit for the main propeller. The main propulsion motor is a 254KW, 3PH, 380V motor. The second load branch is connected to the second busbar, which includes a side propulsion inverter and a ship side propulsion motor. The propulsion motor is a 100KW, 3PH, 380V motor. The third load circuit is connected to the third busbar, which includes a 47.5KW daily inverter and a 60KVA daily transformer. The daily transformer is connected to a current distribution board.

[0031] The load branches of the second load group are respectively a fourth load branch, a fifth load branch and a sixth load branch. The fourth load branch has the same structure as the third load branch, and will not be described herein again, and is connected with a sixth busbar; the fifth load branch is provided with a 47.5KW battery replacement inverter. The fifth load branch is connected with a fifth busbar. The sixth load branch has the same structure as the first load branch, and is connected with a third busbar. The inverter is used for converting direct current into alternating current, and the main propulsion motor is used for driving the ship to sail. The ship side propulsion motor is used for driving the ship to sail laterally.

[0032] Obviously, those skilled in the art can make various modifications and variations to the embodiments in the embodiments of the utility model without departing from the spirit and scope of the embodiments in the utility model. Thus, if these modifications and variations of the embodiments in the utility model belong to the scope of the claims in the embodiments of the utility model and the equivalent technologies, the embodiments in the utility model also intend to include these modifications and variations.

Claims

1. A power supply system based on a distributed busbar, characterized in that, The power supply system comprises a plurality of independent battery groups, a plurality of switches and a plurality of busbar groups. Each busbar group is provided with n non-crossing busbars, each busbar is provided with at least one load connection point for connecting a load, and each busbar group is connected to at least n battery groups, wherein n is an integer greater than or equal to 2. Each battery group is connected to the n busbars in the corresponding busbar group through n branches, and each branch is provided with a switch.

2. The power distribution busbar-based power supply system according to claim 1, characterized by, All busbars are arranged in parallel.

3. The power distribution busbar-based power supply system according to claim 2, characterized by, Adjacent two busbar groups are connected in one-to-one correspondence, and a switch is arranged at the connection position for controlling the on-off state.

4. The power distribution bus-based power supply system according to claim 3, characterized by, The power supply system further comprises two DC bus cabinets, each of which is provided with a busbar group.

5. The power distribution bus-based power supply system according to claim 4, characterized in that, The power supply system further comprises a DC fast charging shore box, which is provided with two output ends connected to the busbars in the two DC bus cabinets.

6. The power distribution bus-based power supply system of claim 3, wherein, The power supply system further comprises a controller, wherein the switch is a DC contactor, and the controller controls the on-off state of the DC contactor to control the on-off state of the battery group and the busbar.

7. A marine power system, characterized by: The power supply system based on the distributed busbar according to any one of claims 1-6 further comprises a plurality of load groups, each of which is connected to a busbar group, and each load group comprises n load branches connected to the busbars in the corresponding busbar group in one-to-one correspondence.

8. The marine power system of claim 7, wherein: The load group and the busbar group are both two groups, and each of the two load groups comprises a main propulsion motor and an inverter, wherein the inverter is used to convert direct current into alternating current, and the main propulsion motor is used to drive the ship to sail.

9. The marine power system of claim 8, wherein: In the two busbar groups, the two busbars connected to the main propulsion motor of the ship are electrically connected.

10. The marine power system of claim 9, wherein: At least one load group is provided with a ship side propulsion motor for lateral propulsion of the ship.

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