Power distribution system with shore power connection function

Abstract

A power distribution system with a shore power connection function provided by the present invention comprises a main power distribution board and an emergency power distribution board, the main power distribution board is provided with a main power distribution module, and the emergency power distribution board is provided with an emergency power distribution module and a shore power module with an automatic commutation function. The main power distribution module is respectively connected with the input end of the emergency power distribution module and the output end of the shore power module through a cable 2, the output end of the shore power module is also connected with the input end of the emergency power distribution module, and the input end of the shore power module is connected with a shore power supply through a cable 1; the invention has the following beneficial effects: by changing the shore power box installed between the emergency generators into the shore power module and installing the shore power module in the emergency distribution board, the required installation space can be greatly reduced; and the outlet end, namely the output end, of the shore power module is connected between the first circuit breaker and the second circuit breaker of the interconnection switch of the main power distribution board, so that a shunting effect is achieved, and the capacity of the first circuit breaker and the capacity of the second circuit breaker are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ship power distribution, and in particular to a power distribution system with a shore power connection function. Background Art

[0002] Conventional seagoing vessels are all equipped with a low-voltage shore power box with a capacity of 400A to 1500A. The current solution is that the shore power box is generally installed in the emergency generator room, in the same room as the emergency distribution board. Sometimes the space in the emergency generator room is limited, and the shore power box also needs to be installed outside the emergency generator room. At the same time, the shore power box is first connected to the main distribution board in the control room far away from the emergency generator room to supply power to the main distribution board, and then the emergency distribution board is supplied through the main distribution board.

[0003] Specific structure such as Figure 1 As shown: the shore power box is installed in the emergency generator room, connected to the fifth circuit breaker QF5 on the main distribution board through cable 3 to supply power to the main distribution board, and then the first circuit breaker QF1 and the second circuit breaker QF2 on the main distribution board and the emergency distribution board are used to supply power to the emergency distribution board; the prior art has the following disadvantages: (1) the current shore power box has high requirements for the space in the emergency generator room, especially when the shore power capacity is large, the size of the shore power box will also be large; (2) there is a long cable between the emergency generator room and the control room, which is not economical; (3) the shore power current supplied from the main distribution board to the emergency distribution board does not have a shunt function, and the capacity of the connecting switch configured on the main distribution board and the emergency distribution board is large; (4) the power supply stability of the emergency distribution board is affected by the first circuit breaker QF1 and the second circuit breaker QF2 on the main distribution board and the emergency distribution board, and is unstable. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a power distribution system with a shore power connection function, so as to solve the problem in the prior art that the shore power box has high requirements for the space between emergency generators, and that the shore power current supplied from the main distribution board to the emergency distribution board does not have a shunt function.

[0005] To achieve the above objectives and other related objectives, the present invention provides the following technical solutions:

[0006] A power distribution system with a shore power connection function, comprising a main distribution board and an emergency distribution board, wherein the main distribution board is provided with a main distribution module, the emergency distribution board is provided with an emergency distribution module, and the emergency distribution board is also provided with a shore power module with an automatic phase change function, wherein the main distribution module is respectively connected to the input end of the emergency distribution module and the output end of the shore power module through a cable 2, the output end of the shore power module is also connected to the input end of the emergency distribution module, and the input end of the shore power module is connected to the shore power supply through a cable 1;

[0007] The shore power module includes a fourth circuit breaker and a fifth circuit breaker which are connected and interlocked with each other, one end of the fourth circuit breaker and the fifth circuit breaker is connected to the shore power supply through cable 1, and the other end of the fourth circuit breaker and the fifth circuit breaker is connected to the main power distribution module through cable 2, and the other end of the fourth circuit breaker and the fifth circuit breaker is also connected to the input end of the emergency power distribution module.

[0008] The above technical solution can greatly reduce the required installation space by replacing the shore power box installed in the emergency generator room with a shore power module installed in the emergency distribution board; and move the fifth circuit breaker originally belonging to the main distribution board to the shore power module to add an automatic phase change function, thereby reducing the cable configuration.

[0009] In one embodiment of the present invention, the main distribution board is installed in a control room on a ship, and the main distribution module includes a bus A installed on the main distribution board and a first circuit breaker connected to the bus A, and the end of the first circuit breaker away from the bus A is respectively connected to the input end of the emergency distribution module and the output end of the shore power module through a cable 2.

[0010] In one embodiment of the present invention, the main power distribution module also includes a sixth circuit breaker connected to the bus A, a seventh circuit breaker and an eighth circuit breaker connected to the bus A, the end of the sixth circuit breaker away from the bus A is connected to the main generator, and the ends of the seventh circuit breaker and the eighth circuit breaker away from the bus A are connected to the ship load equipment.

[0011] In one embodiment of the present invention, the emergency distribution board is installed in an emergency power generation room on a ship, and the emergency distribution module includes a bus B installed on the emergency distribution board and a second circuit breaker connected to the bus B, the end of the second circuit breaker away from the bus B is connected to the main distribution module through a cable 2, and the end of the second circuit breaker away from the bus B is also connected to the output end of the shore power module.

[0012] In one embodiment of the present invention, the emergency power distribution module also includes a third circuit breaker connected to the bus B and interlocked with the second circuit breaker, a ninth circuit breaker and a tenth circuit breaker connected to the bus B, the end of the third circuit breaker away from the bus B is connected to the emergency generator, and the ends of the ninth circuit breaker and the tenth circuit breaker away from the bus B are connected to the ship load equipment.

[0013] As described above, the power distribution system with shore power connection function of the present invention has the following beneficial effects:

[0014] The present invention can greatly reduce the required installation space by replacing the shore power box installed in the emergency generator room with a shore power module installed in the emergency distribution board; and move the fifth circuit breaker originally belonging to the main distribution board to the shore power module to add an automatic phase change function, thereby reducing the cable configuration; and the outlet end of the shore power module, that is, the output end, is connected between the first circuit breaker and the second circuit breaker of the main distribution board contact switch, thereby playing a shunting role and reducing the capacity of the first circuit breaker and the second circuit breaker; and also increases the power supply stability of the emergency distribution board, and the failure of the first circuit breaker will not affect the shore power supply on the emergency distribution board, so that it is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of the overall structure of an existing power distribution system;

[0016] Figure 2 Shown is a schematic diagram of the overall structure of a power distribution system with shore power connection function disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0018] See also Figure 2 The present invention provides a power distribution system with a shore power connection function, comprising a main distribution board installed in a ship control room and an emergency distribution board installed in an emergency power generation room of the ship, wherein the main distribution board is provided with a main distribution module, and the emergency distribution board is provided with an emergency distribution module and a shore power module with an automatic phase change function, wherein when the shore power module is used to power the main distribution board and the emergency distribution board, the automatic phase change function controls the fourth circuit breaker QF4 or the fifth circuit breaker QF5 in the following text to be in a closed state according to actual needs.

[0019] See also Figure 2 , the main power distribution module includes a bus bar A, a first circuit breaker, a sixth circuit breaker, a seventh circuit breaker and an eighth circuit breaker installed on the main power distribution board. The first circuit breaker QF1, the sixth circuit breaker QF6, the seventh circuit breaker QF7 and the eighth circuit breaker QF8 are selected as examples for explanation;

[0020] One end of the first circuit breaker QF1 is connected to bus A, and the other end of the first circuit breaker QF1 is connected to the input end of the emergency power distribution module and the output end of the shore power module through cable 2; one end of the sixth circuit breaker QF6 is connected to bus A, and the other end of the sixth circuit breaker QF6 is connected to the main generator; one end of the seventh circuit breaker QF7 and the eighth circuit breaker QF8 are connected to bus A, and the other end of the seventh circuit breaker QF7 and the eighth circuit breaker QF8 are connected to the ship load equipment.

[0021] See also Figure 2 The emergency power distribution module includes a bus bar B, a second circuit breaker, a third circuit breaker, a ninth circuit breaker and a tenth circuit breaker installed on the emergency power distribution board. The second circuit breaker QF2, the third circuit breaker QF3, the ninth circuit breaker QF9 and the tenth circuit breaker QF10 are selected as examples for explanation;

[0022] One end of the second circuit breaker QF2 is connected to the bus B, and the other end of the second circuit breaker QF2 is connected to the main distribution module through cable 2, and the other end of the second circuit breaker QF2 is also connected to the output end of the shore power module; one end of the third circuit breaker QF3 is connected to the bus B, and the other end of the third circuit breaker QF3 is connected to the emergency generator, and the third circuit breaker QF3 is also interlocked with the second circuit breaker QF2; one end of the ninth circuit breaker QF9 and the tenth circuit breaker QF10 are connected to the bus B, and the other end of the ninth circuit breaker QF9 and the tenth circuit breaker QF10 are connected to the ship load equipment.

[0023] See also Figure 2 The shore power module includes a fourth circuit breaker and a fifth circuit breaker. The fourth circuit breaker QF4 and the fifth circuit breaker QF5 are selected as examples for explanation below; the fourth circuit breaker QF4 and the fifth circuit breaker QF5 are connected and interlocked with each other, one end of the fourth circuit breaker QF4 and the fifth circuit breaker QF5 is connected to the shore power supply through cable 1, and the other end of the fourth circuit breaker QF4 and the fifth circuit breaker QF5 is connected to the main power distribution module through cable 2, and the other end of the fourth circuit breaker QF4 and the fifth circuit breaker QF5 is also connected to the input end of the emergency power distribution module.

[0024] Specifically, the present invention Figure 1The shore power box installed in the emergency generator room is changed to a shore power module installed in the emergency distribution board, which can greatly reduce the required installation space; and the fifth circuit breaker QF5 originally belonging to the main distribution board is moved to the shore power module to add an automatic phase change function, and a shore power cable 3 from the emergency generator room to the control room is reduced; at the same time, the outlet end of the shore power module, that is, the output end, is connected between the first circuit breaker QF1 and the second circuit breaker QF2 of the main distribution board contact switch, which plays a shunt role, reduces the capacity of the first circuit breaker QF1 and the second circuit breaker QF2, and increases the power supply stability of the emergency distribution board, and the failure of the first circuit breaker QF1 will not affect the shore power supply on the emergency distribution board.

[0025] More specifically, in actual application, the main switchboard and the emergency switchboard are connected by cable 2, that is, one connector of cable 2 is connected to the main switchboard, and one end of the first circuit breaker QF1 on the main switchboard is connected to the connector of cable 2 connected to the main switchboard; the other connector of cable 2 is connected to the emergency switchboard, and the shore power module and the emergency power distribution module are installed on the emergency switchboard, so one end of the fourth circuit breaker QF4 and the fifth circuit breaker QF5 on the shore power module are connected to the connector of cable 2 connected to the emergency switchboard through the copper bus or wire in the emergency switchboard, and one end of the second circuit breaker QF2 in the emergency power distribution module is also connected to the connector of cable 2 connected to the emergency switchboard through the copper bus or wire in the emergency switchboard, so it can be seen that the outlet end of the shore power module, that is, the output end, is connected between the first circuit breaker QF1 and the second circuit breaker QF2 of the connecting switch of the main switchboard, so as to play a diversion role when supplying power;

[0026] Also see Figure 1 ,use Figure 1 When the power distribution connection mode is used for power supply, if the input shore power supply is 100A, then the capacity of the fourth circuit breaker QF4 also needs to be 100A, and the capacity of the fifth circuit breaker QF25, the first circuit breaker QF1 and the second circuit breaker QF2 also needs to be 100A, but in Figure 2 In the embodiment, because the output end of the shore power supply is located between the first circuit breaker QF1 and the second circuit breaker QF2, the capacity of the fourth circuit breaker QF4 and the fifth circuit breaker QF5 is the same as the ampere of the shore power supply, while the capacity of the first circuit breaker QF1 and the second circuit breaker QF2 is reduced, which may be 50A. Therefore, this configuration reduces the capacity of the first circuit breaker QF1 and the second circuit breaker QF2; and the shore power module and the emergency distribution board in the present invention can both supply power to the emergency distribution board. Such a configuration increases the power supply stability of the emergency distribution board, and will not affect the shore power supply on the emergency distribution board due to the failure of the first circuit breaker QF1.

[0027] Furthermore, the working principle of the power distribution system with shore power connection function is as follows: when the ship is moored, the shore power supply is connected to the shore power module in the emergency distribution board through cable 1, and the shore power module is connected to the first circuit breaker QF1 through cable 2 to supply power to the ship load on the main distribution board. At the same time, the shore power module is connected to the second circuit breaker QF2 through the copper bus or wire in the emergency distribution board to supply power to the ship load on the emergency distribution board; when the ship is sailing, the power supply in the main distribution board is connected to the emergency distribution board through cable 2, and is connected to the second circuit breaker QF2 through the copper bus or wire in the emergency distribution board to supply power to the ship load on the emergency distribution board.

[0028] In summary, the present invention can lower the space requirement for the emergency generator room, which not only reduces the cable configuration and reduces the cost of the distribution system with shore power connection function, but also adds an automatic phase change function, and also diverts the shore power current to the main distribution board and the emergency distribution board, reducing the configuration capacity of the connecting switch of the main distribution board and the emergency distribution board, and increasing the shore power supply stability of the emergency distribution board, thereby facilitating promotion and use.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A power distribution system with shore power connection function, comprising a main distribution board and an emergency distribution board, wherein the main distribution board is provided with a main distribution module, and the emergency distribution board is provided with an emergency distribution module, characterized in that: The emergency power distribution board is also provided with a shore power module with an automatic phase-changing function. The main power distribution module is connected to the input end of the emergency power distribution module and the output end of the shore power module through cable 2, respectively. The output end of the shore power module is also connected to the input end of the emergency power distribution module. The input end of the shore power module is connected to the shore power supply through cable 1. The shore power module includes a fourth circuit breaker and a fifth circuit breaker which are connected and interlocked with each other, one end of the fourth circuit breaker and the fifth circuit breaker is connected to the shore power supply through cable 1, and the other end of the fourth circuit breaker and the fifth circuit breaker is connected to the main power distribution module through cable 2, and the other end of the fourth circuit breaker and the fifth circuit breaker is also connected to the input end of the emergency power distribution module.

2. A power distribution system with shore power connection function according to claim 1, characterized in that: The main distribution board is installed in the control room of the ship. The main distribution module includes a bus A installed on the main distribution board and a first circuit breaker connected to the bus A. The end of the first circuit breaker away from the bus A is respectively connected to the input end of the emergency distribution module and the output end of the shore power module through a cable 2.

3. A power distribution system with shore power connection function according to claim 2, characterized in that: The main power distribution module also includes a sixth circuit breaker connected to the bus A, a seventh circuit breaker and an eighth circuit breaker connected to the bus A, the end of the sixth circuit breaker away from the bus A is connected to the main generator, and the ends of the seventh circuit breaker and the eighth circuit breaker away from the bus A are connected to the ship load equipment.

4. A power distribution system with shore power connection function according to claim 1, characterized in that: The emergency distribution board is installed in an emergency power generation room on the ship. The emergency distribution module includes a bus B installed on the emergency distribution board and a second circuit breaker connected to the bus B. The end of the second circuit breaker away from the bus B is connected to the main distribution module through a cable 2, and the end of the second circuit breaker away from the bus B is also connected to the output end of the shore power module.

5. A power distribution system with shore power connection function according to claim 4, characterized in that: The emergency power distribution module also includes a third circuit breaker connected to the bus B and interlocked with the second circuit breaker, a ninth circuit breaker and a tenth circuit breaker connected to the bus B, the end of the third circuit breaker away from the bus B is connected to the emergency generator, and the ends of the ninth circuit breaker and the tenth circuit breaker away from the bus B are connected to the ship load equipment.

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