Direct current emergency power distribution system

Abstract

The invention relates to a direct-current emergency power distribution system, and the system comprises a direct-current emergency power distribution board which is provided with a power distribution board bus, a first power supply sub-line, a second power supply sub-line, and a plurality of load sub-lines. The storage battery pack is connected with the distribution board bus through a first power supply sub-line, and a first switch is arranged on the first power supply sub-line; the high-capacity charging and discharging device is connected with the distribution board bus through a second power supply sub-line, and a second switch is arranged on the second power supply sub-line; the input end of the insulation monitoring device is respectively connected with the distribution board bus, the first power supply sub-line and each load sub-line; and the direct current information monitoring device is respectively connected with the high-capacity charging and discharging device and each load sub-line. When the main power supply fails or needs to be maintained, the emergency power supply can be rapidly started and supply power, so that the safety of the ship and the life safety of personnel on the ship are guaranteed, and the ship emergency power supply has great practical value.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current emergency power distribution, and in particular to a direct current emergency power distribution system. Background Art

[0002] The DC emergency power distribution system is an important part of the ship's electrical system, especially in the face of emergency situations. Therefore, it is necessary to design a DC emergency power distribution system that can ensure that the emergency power supply can be quickly started and supplied when the main power supply fails or maintenance is required, so as to ensure the safety of the ship and the lives of the personnel on board; and enable the DC emergency power distribution system to control and monitor the working status of the system to ensure that the emergency power distribution system can automatically start and close the switch to supply power when the main power grid loses power, so as to meet the power supply needs of key equipment in emergency situations.

[0003] It should be understood that the above statements merely provide background technology related to the present invention and do not necessarily constitute prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a direct current emergency power distribution system, so as to supply power to key equipment that meets the power demand in emergency situations.

[0005] In order to achieve the above-mentioned object, the present invention provides a DC emergency power distribution system, comprising: a DC emergency distribution board, on which a distribution board bus, a first power sub-line, a second power sub-line and a plurality of load sub-lines are arranged; a battery pack, connected to the distribution board bus through the first power sub-line, and a first switch is arranged on the first power sub-line; a large-capacity charging and discharging device, connected to the distribution board bus through the second power sub-line, and a second switch is arranged on the second power sub-line; an insulation monitoring device, whose input ends are respectively connected to the distribution board bus, the first power sub-line and each of the load sub-lines, respectively monitoring whether the distribution board bus, the first power sub-line and each of the load sub-lines are insulated; a DC information monitoring device, respectively connected to the large-capacity charging and discharging device and each of the load sub-lines, respectively monitoring the DC information on the large-capacity charging and discharging device and each of the load sub-lines.

[0006] Preferably, each of the load sub-lines is respectively connected to a corresponding DC load to form a load circuit; and each of the load sub-lines is also provided with a corresponding load switch to independently control each of the load circuits to be closed or opened.

[0007] Preferably, the DC emergency power distribution system also includes a power monitoring station; the output end of the insulation monitoring device is connected to the power monitoring station to output insulation monitoring information to the power monitoring station; the output end of the DC information monitoring device is connected to the power monitoring station to output DC monitoring information to the power monitoring station.

[0008] Preferably, a busbar of the distribution board is provided with a busbar switch, and the busbar switch is located between the battery pack, the large-capacity charging and discharging device and the plurality of load circuits.

[0009] Preferably, a bus is provided on the busbar of the distribution board, and the bus is located between the bus tie switch and the multiple load circuits, and is respectively connected to each of the load sub-lines, and the bus is respectively provided with multiple load selection switches corresponding to each load circuit to control the power transfer distribution and load circuit selection of the DC emergency distribution board.

[0010] Preferably, a release is provided on the first switch and the second switch respectively.

[0011] Preferably, the insulation monitoring device comprises a plurality of insulation monitoring sensors, each of which is respectively arranged on the distribution board bus, the first power sub-line and each of the load sub-line; the DC information monitoring device comprises a plurality of DC power collection modules, each of which is respectively arranged on each of the load sub-line.

[0012] Preferably, the DC emergency power distribution system is provided with at most 44 load sub-lines, and can provide power to at most 44 loads.

[0013] Preferably, when the battery pack supplies power to a load circuit, the first switch is closed, the bus tie switch is closed, the load selection switch of the load circuit on the bus is closed, the load switch on the load circuit is closed, and current flows from the battery pack to the load circuit to enable the load circuit to operate normally.

[0014] Preferably, when the battery pack provides insufficient power for supplying power to the load circuit, the large-capacity charging and discharging device can charge the battery pack and supply power to the load circuit at the same time.

[0015] In summary, compared with the prior art, the DC emergency power distribution system provided by the present invention can ensure that when the main power supply fails or maintenance is required, the emergency power supply can be quickly started and supplied, thereby ensuring the safety of the ship and the lives of people on board; and can control and monitor the working condition of the DC emergency power distribution system to ensure that when the main power grid loses power, the DC emergency power distribution system can automatically start and close the switch to supply power, thereby meeting the power supply of key equipment with power needs in emergency situations, and has great practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the specific structure of the DC emergency power distribution system of the present invention. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1 , the present invention is further explained by describing a preferred specific embodiment in detail.

[0018] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0019] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0020] like Figure 1As shown, the present invention provides a DC emergency power distribution system, comprising: a DC emergency distribution board 1, on which a distribution board bus 11, a first power sub-line 12, a second power sub-line 13 and a plurality of load sub-lines 14 are arranged; a battery pack 2, connected to the distribution board bus 11 through the first power sub-line 12, and a first switch 1QF1 is arranged on the first power sub-line 12; a large-capacity charging and discharging device 3, connected to the distribution board bus 11 through the second power sub-line 13, and a second power sub-line 13 is arranged on the second power sub-line 13 A second switch 1QF12 is provided; an insulation monitoring device 4, whose input end is respectively connected to the distribution board bus 11, the first power sub-line 12 and each of the load sub-lines 14, to respectively monitor whether the distribution board bus 11, the first power sub-line 12 and each of the load sub-lines 14 are insulated; a DC information monitoring device 5, which is respectively connected to the large-capacity charging and discharging device 3 and each of the load sub-lines 14, to respectively monitor the DC information on the large-capacity charging and discharging device 3 and each of the load sub-lines 14.

[0021] Furthermore, each of the load sub-lines 14 is respectively connected to a corresponding DC load to form a load circuit; and each of the load sub-lines 14 is also provided with a corresponding load switch (QF1, QF2, etc.) to independently control each of the load circuits to be closed or opened.

[0022] Furthermore, the DC emergency power distribution system also includes a power monitoring station, and the output end of the insulation monitoring device 4 is connected to the power monitoring station to output insulation monitoring information to the power monitoring station; the output end of the DC information monitoring device 5 is connected to the power monitoring station to output DC monitoring information to the power monitoring station.

[0023] Furthermore, a bus tie switch QS1 is provided on the distribution board bus 11, and the bus tie switch QS1 is located between the battery pack 2, the large-capacity charging and discharging device 3 and the multiple load circuits, and serves as an isolating switch to isolate the load circuit from the battery pack 2 and the large-capacity charging and discharging device 3.

[0024] The distribution board bus 11 is also connected with a busbar 6, which is arranged between the bus tie switch QS1 and the plurality of load circuits, and the busbar 6 is respectively connected to each of the load sub-lines 14, which can bring together different load sub-lines 14, and the busbar 6 is respectively provided with a plurality of load selection switches corresponding to each load circuit, and different load circuits are selected to be connected to the busbar 6 through different load selection switches, and different load circuits are opened or closed at different times to achieve the purpose of selecting different load circuits; at the same time, the busbar 6 can also distribute the current in the distribution board bus 11 to different load sub-line 14 branches to meet the needs of different load circuits. It can be understood that the busbar 6 can control the power transmission and distribution of the DC emergency distribution board 1 and the selection of load circuits.

[0025] It should be noted that only when the load selection switch of the bus 6 selects a load circuit and the load switch on the load circuit is closed, can the load circuit operate normally; when the load switch on a load circuit is closed, but the load selection switch corresponding to the load circuit on the bus 6 is open, the load circuit cannot operate normally.

[0026] The busbar 6 is made of a material with good electrical conductivity, thermal conductivity, corrosion resistance and excellent processing performance. In this embodiment, the busbar 6 is made of metal copper with a purity of 99.95%.

[0027] The first switch 1QF1 and the second switch 1QF2 are respectively provided with a release, and the rated current of the release is 1000A. When the current passing through the first switch 1QF1 exceeds 1000A, the first switch 1QF1 is automatically disconnected; when the current passing through the second switch 1QF2 exceeds 1000A, the second switch 1QF2 is automatically disconnected.

[0028] Wherein, the working voltage of the insulation monitoring device 4 and the DC information monitoring device 5 is AC220V.

[0029] It can be understood that when the battery group 2 supplies power to a load circuit, the first switch 1QF1 is closed, the main switch QS1 is closed, the load selection switch of the load circuit on the bus 6 is closed, the load switch on the load circuit is closed, and the current flows from the battery group 2 to the load circuit, and the load circuit can operate normally.

[0030] Furthermore, when the electric energy of the battery group 2 is insufficient to supply power to the load circuit, the large-capacity charging and discharging device 3 charges the battery group 2, and at the same time supplies power to the load circuit; when the large-capacity charging and discharging device 3 charges the battery group 2, the first switch 1QF1 and the second switch 1QF2 are closed, and the current flows from the large-capacity charging and discharging device 3 to the battery group 2 to charge the battery group 2; when the large-capacity charging and discharging device 3 supplies power to a certain load circuit, the second switch 1QF2 and the bus tie switch QS1 are closed, the load selection switch of the load circuit on the bus 6 is closed, the load switch on the load circuit is closed, the current flows from the large-capacity charging and discharging device 3 to the load circuit, and the load circuit can operate normally.

[0031] It should be noted that, when the DC emergency distribution board 1 is maintained, the bus tie switch QS1 can be disconnected, at which time the first switch 1QF1 and the second switch 1QF2 are closed, the battery group 2 can still be charged normally, and the current flows from the large-capacity charging and discharging device 3 to the battery group 2; and when the battery group 2 is maintained and discharged, the bus tie switch QS1 can also be disconnected, at which time the first switch 1QF1 and the second switch 1QF2 are closed, and the current flows from the battery group 2 to the large-capacity charging and discharging device 3, so as to realize the constant current discharge of the battery group 2 by the large-capacity charging and discharging device 3.

[0032] Furthermore, in this embodiment, the DC emergency power distribution system of the present invention is provided with at most 44 load sub-lines 14, and can provide power to at most 44 load circuits.

[0033] Furthermore, the insulation monitoring device 4 includes a number of insulation monitoring sensors connected thereto, and the insulation monitoring sensors are respectively arranged on the distribution board bus 11, the first power sub-line 12 and each of the load sub-lines 14, to monitor whether the capacitance value of the corresponding circuit part is normal, so as to determine whether the circuit part is insulated or not, and feed back the monitoring information to the insulation monitoring device 4, and finally the insulation monitoring device 4 feeds back the monitoring information to the power monitoring station for integration, so as to monitor the insulation condition of the DC emergency power distribution system in real time, ensure the normal operation of the system and prevent the occurrence of electrical accidents. Among them, when the circuit is normally insulated, the capacitance value is proportional to the dielectric constant and the electrode spacing, and the measured capacitance value is large and higher than the set capacitance value threshold; when the insulation fails, the insulation performance of the medium deteriorates, resulting in a decrease in the electrode spacing, and the capacitance value will decrease, which is lower than the set capacitance value threshold. Furthermore, the DC information monitoring device 5 includes a plurality of DC power collection modules connected thereto, and the DC power collection modules are respectively arranged on each of the load sub-lines 14 to monitor the relevant parameters (voltage, current, etc.) of the DC power on the corresponding load sub-line, and feed the monitoring information back to the DC information monitoring device 5, and finally the DC information monitoring device 5 feeds back the monitoring information to the power monitoring station for integration, so as to monitor and record the DC power related parameters of the DC emergency power distribution system in real time, and provide data support for the stable operation of the system.

[0034] Furthermore, the DC information monitoring device 5 is also connected to the large-capacity charging and discharging device 3 for direct monitoring of the DC power related parameters of the large-capacity charging and discharging device 3, and also feeds back the monitoring information to the power monitoring station for integration.

[0035] In summary, a DC emergency power distribution system of the present invention can ensure that when the main power supply fails or maintenance is required, the emergency power supply can be quickly started and supplied, thereby ensuring the safety of the ship and the lives of the personnel on board; and can control and monitor the working condition of the DC emergency power distribution system to ensure that when the main power grid loses power, the DC emergency power distribution system can automatically start and close the switch to supply power, thereby meeting the power supply of key equipment with power demand in emergency situations, and has great practical value.

[0036] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A DC emergency power distribution system, characterized in that: include: A DC emergency switchboard, on which a switchboard busbar, a first power sub-line, a second power sub-line and a plurality of load sub-lines are arranged; A battery pack is connected to the distribution board busbar through a first power sub-line, and a first switch is provided on the first power sub-line; A large-capacity charging and discharging device is connected to the distribution board busbar through a second power sub-line, and a second switch is provided on the second power sub-line; An insulation monitoring device, whose input end is respectively connected to the distribution board busbar, the first power sub-line and each of the load sub-lines, to respectively monitor whether the distribution board busbar, the first power sub-line and each of the load sub-lines are insulated; The DC information monitoring device is connected to the large-capacity charging and discharging device and each of the load sub-lines respectively, and monitors the DC information on the large-capacity charging and discharging device and each of the load sub-lines respectively.

2. The DC emergency power distribution system according to claim 1, characterized in that: Each of the load sub-lines is respectively connected to a corresponding DC load to form a load circuit; Each load sub-line is also provided with a corresponding load switch to independently control each load circuit to be closed or opened.

3. The DC emergency power distribution system according to claim 1, characterized in that: The DC emergency power distribution system also includes a power monitoring station; The output end of the insulation monitoring device is connected to the power monitoring station to output insulation monitoring information to the power monitoring station; The output end of the DC information monitoring device is connected to the power monitoring station to output DC monitoring information to the power monitoring station.

4. The DC emergency power distribution system according to claim 2, characterized in that: A busbar switch is provided on the distribution board busbar, and the busbar switch is located between the battery pack, the large-capacity charging and discharging device and the plurality of load circuits.

5. The DC emergency power distribution system according to claim 4, characterized in that: A busbar is provided on the busbar of the distribution board, and the busbar is located between the bus tie switch and the multiple load circuits, and is connected to each load sub-line respectively. The busbar is provided with multiple load selection switches corresponding to each load circuit to control the power transmission and distribution and load circuit selection of the DC emergency distribution board.

6. The DC emergency power distribution system according to claim 1, characterized in that: The first switch and the second switch are respectively provided with a release.

7. The DC emergency power distribution system according to claim 1, characterized in that: The insulation monitoring device comprises a plurality of insulation monitoring sensors, each of which is respectively arranged on the distribution board bus, the first power sub-line and each of the load sub-lines; The DC information monitoring device comprises a plurality of DC power acquisition modules, each of which is correspondingly arranged on each of the load sub-lines.

8. The DC emergency power distribution system according to claim 1, characterized in that: The DC emergency power distribution system is provided with at most 44 load sub-lines and can provide power to at most 44 loads.

9. The DC emergency power distribution system according to claim 5, characterized in that: When the battery pack supplies power to a load circuit, the first switch is closed, the bus tie switch is closed, the load selection switch of the load circuit on the bus is closed, the load switch on the load circuit is closed, and current flows from the battery pack to the load circuit to enable the load circuit to operate normally.

10. The DC emergency power distribution system according to claim 9, characterized in that: When the battery pack provides insufficient power for the load circuit, the large-capacity charging and discharging device can charge the battery pack and supply power to the load circuit at the same time.

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