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Short-circuit protection method for low-voltage direct-current power distribution system of ship

A power distribution system, low-voltage direct current technology, applied in the direction of direct current network circuit devices, circuit devices, emergency protection circuit devices, etc., can solve the problems of load loss of power, power loss, etc., to increase the continuity of power supply, realize selectivity, The effect of enhancing the continuity of power supply

Pending Publication Date: 2022-06-03
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the "one word" type open-loop power grid, if a bus section fails, the bus section is cut off by a solid-state switch, which may form two isolated bus sections. Once one of the bus sections has no power supply, all loads in the bus section will will lose power, resulting in a loss of power

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  • Short-circuit protection method for low-voltage direct-current power distribution system of ship
  • Short-circuit protection method for low-voltage direct-current power distribution system of ship
  • Short-circuit protection method for low-voltage direct-current power distribution system of ship

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Embodiment Construction

[0015] In order to make the technical means realized by the present invention, creative features, and the effectiveness of achieving goals and solving problems easy to understand, the technical solutions of the present invention are further described with reference to the accompanying drawings.

[0016] With the increase of the DC power supply and DC load capacity of the ship's low-voltage DC power distribution system, when the power system design is carried out, the DC bus of the ship's low-voltage DC power distribution system is usually divided into multiple sections (generally greater than or equal to 3 sections).

[0017] The DC bus of the marine low-voltage DC power distribution system of the present invention is divided into multiple sections (generally greater than or equal to 3 sections), each section of the DC bus is configured with one or more groups of power sources and loads, and one or two DC solid-state switches are passed between each DC bus section. The connecti...

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Abstract

The invention discloses a short-circuit protection method for a ship low-voltage direct-current power distribution system, and the method is based on a closed-loop power distribution system which is formed by connecting at least three direct-current bus sections in series through a direct-current solid-state switch. And the solid-state switches at the two ends of the fault direct-current bus section or the fault connecting line quickly act to cut off the fault part, and other non-fault direct-current bus sections and connecting lines keep normal operation. The system has better power supply continuity for a ship low-voltage direct-current power distribution system formed by multiple groups of power supplies and multiple bus sections, and can better meet the requirements of a DP2 or DP3-level dynamic positioning ship power distribution system.

Description

technical field [0001] The invention belongs to the technical field of marine electric propulsion, and in particular relates to a short-circuit protection strategy for a marine low-voltage closed-loop DC power distribution system. Background technique [0002] At present, the capacity of the ship's low-voltage DC power distribution system is small, and the ship's low-voltage DC power distribution system generally adopts a non-closed-loop system. power supply and DC load. DC solid-state switches are used for protection between DC bus segments. [0003] As the capacity of the ship's power grid becomes larger and larger, and the number of DC power sources and loads increases, the busbar segment is generally divided into more segments. In the "in-line" open-loop power grid, if a bus section fails, the bus section is cut off by the solid-state switch, which may form two isolated bus sections. Once there is no power supply in one of the bus sections, all loads in the bus section...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H7/22H02J1/00
CPCH02H7/268H02H7/22H02J1/00Y02E60/60
Inventor 龙飞耿鹏张丽郑雪筠
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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