Pure battery power ship comprehensive power system radial power grid structure and a control method

A power system and power grid structure technology, applied to battery circuit devices, electric vehicles, ship propulsion, etc., can solve problems such as limiting system operation flexibility, reducing shore power supply efficiency, increasing resource consumption, etc., to achieve isolation and online maintenance , Improve system performance-to-cost ratio, and improve system reliability

Active Publication Date: 2021-09-07
湖北东湖实验室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these equipment failures need to be repaired, the fast fuse cannot provide the function of disconnecting the branch circuit of the faulty equipment, which makes these equipment unable to be repaired online, thus limiting the flexibility of system operation
[0004] 2) An additional shore power rectification and charging device is required, which increases the cost and reduces the power supply efficiency of the shore power
This method not only requires an additional rectification and charging device, which increases the cost and the overall resource consumption of the ship, but also has two stages of power conversion in shore power supply, and the power supply efficiency is low.
[0005] 3) The system integration is not high
The DC power distribution board and the AC power distribution board are configured separately, and additional switching elements and cables need to be added between them, resulting in low system integration, reduced reliability, and increased cost

Method used

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  • Pure battery power ship comprehensive power system radial power grid structure and a control method
  • Pure battery power ship comprehensive power system radial power grid structure and a control method
  • Pure battery power ship comprehensive power system radial power grid structure and a control method

Examples

Experimental program
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Embodiment 1

[0042] figure 2 Shows the preferred embodiment of the application ( figure 2 It shows a schematic structural diagram of a radial grid structure of a pure battery-powered ship integrated power system provided in the first embodiment of the present application. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0043] This embodiment is illustrated by taking a ship with two propulsion motors (that is, m is 2) as an example, in the figure:

[0044] B 1 , B 2 ,...B 2n It is 2n groups of lithium battery packs; S 1 , S 2 ,…S 2n 2n isolation switches; C 1 , C 2 ,...C 2n Connecting DC / DC converters for 2n lithium battery packs; K 1_1 , K 2_1 ,…K 2n_1 It is a DC switch assembly for charging 2n lithium battery packs, K 1_2 , K 2_2 ,…K 2n_2 It is a DC switch assembly used for connecting 2n DC / DC converters to DC busbars, K B It is a DC switch assembly connecting 2 sections of DC busbars, K D1 and K...

Embodiment 2

[0056] In this embodiment, a ship including two propulsion motors (that is, m is 2) is taken as an example for illustration.

[0057] Such as Figure 6 As shown, under sailing conditions, according to the propulsion and daily load power, different numbers of lithium battery packs and their DC / DC converters are put in to supply power to 750V or 1000V DC busbars (between two sections of DC busbars The DC switch assembly K B closing); DC switch assembly K 1_1 -K 2n_1 Opening, DC switch assembly K D1 and K D2 Closing, AC contactor J D1_1 、J D1_2 、J D2_1 and J D2_2 Closing, AC circuit breaker B D1 and B D2 Open, two propulsion frequency converters / rectifier and charging integrated devices work in frequency converter mode, driving two propulsion motors respectively; one DC / AC inverter is put into operation, and the other DC / AC inverter is in standby state, such as Inverter I 1 input, DC switch assembly K I1 Closing, AC circuit breaker B I1 is closed, the inverter I 1 ...

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Abstract

The invention relates to the technical field of ship power systems, in particular to a pure battery power ship comprehensive power system radial power grid structure and a control method. The power grid structure comprises a direct-current busbar, an alternating-current busbar, a battery pack, a DC/DC converter, a DC/AC inverter and a boosting frequency converter/rectifying and charging integrated device, an isolating switch is connected between the input end of the DC/DC converter and the battery pack, a first direct-current switch assembly is connected between the input end of the DC/DC converter and the direct-current busbar, a second direct-current switch assembly is connected between the output end of the DC/DC converter and the direct-current busbar, at least one section of direct current busbar is connected to the first alternating current busbar through a fourth direct current switch assembly, a DC/AC inverter and a first alternating current circuit breaker which are connected in sequence, and each section of direct current busbar is connected to one section of second alternating current busbar through a third direct current switch assembly, a propulsion frequency converter/rectification charging integrated device and a first alternating current contactor which are connected in sequence; and each section of the second alternating current busbar is connected to a propulsion motor through a second alternating current contactor.

Description

technical field [0001] The invention relates to the technical field of ship power systems, in particular to a radial grid structure and a control method of a pure battery-powered ship comprehensive power system. Background technique [0002] With the in-depth implementation of my country's energy-saving emission reduction, energy production and consumption revolution policies, my country's energy, transportation and other fields have ushered in major opportunities for development. In terms of inland ships, pure battery-powered ships have the advantages of zero emission, no pollution, quietness, and good maneuverability. However, there are generally three problems in the grid structure of the integrated power system of the existing and under research pure battery powered ships: [0003] 1) Equipment online maintenance is difficult. The existing integrated power system for pure battery-powered ships mainly adopts a low-voltage DC radial grid structure with fast fuses as prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J4/00H02J7/34B63H21/17
CPCH02J4/00H02J7/34B63H21/17
Inventor 马伟明马凡付立军张彦黄河吴优纪锋胡祺
Owner 湖北东湖实验室
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