Non-self-powered ship shore-ship integrated power distribution system
A technology for power distribution systems and ships, applied in the field of ships, can solve problems such as dangerous voltage, shortened service life, and increased cost of use, and achieve the effect of flexible and convenient use and cost saving
Pending Publication Date: 2022-01-28
JIANGNAN SHIPYARD GRP CO LTD
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Problems solved by technology
[0003] When there is a large current in the neutral line, it will inevitably cause the offset of the neutral point, resulting in unstable voltage and current, causing damage to the equipment or shortening the service life
In a system with a common potential between the working neutral line and the protective zero line, if the neutral line current is too high, the protective grounding in the system will be unsafe, which will bring great hidden dangers to the safety of personnel and the use of equipment.
In the case of neutral line disconnection, the single-phase equipment and the equipment connected to zero will generate dangerous voltage after the disconnection, which will directly damage the load equipment.
Three-phase four-wire system, if there is a short circuit to ground, the peak value of the short circuit current will be as high as thousands or even tens of thousands of amperes, which will have a large impact on the power grid and cause systemic damage
[0004] In addition, ships berthing at different wharves, and the power system does not match, which will seriously affect the berthing of ships. If the wharf is refitted, the cost of use will increase a lot
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[0013] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0014] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper"...
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A non-self-powered ship shore-ship integrated power distribution system comprises a shore power supply side, a ship power utilization side and an isolation transformer, the isolation transformer is connected between the shore power supply side and the ship power utilization side, and the isolation transformer is in delta connection with one end of the ship power utilization side; the danger that the voltage of single-phase equipment and the equipment for protecting the zero position is instantaneously increased to generate dangerous voltage and cause damage if the neutral line is broken when the neutral line is applied during the connection of the power utilization side on the ship is avoided; and meanwhile, the power distribution system is flexible and convenient to use, so that the shore power utilization side of the wharf does not need to carry out line reconstruction on the ship power utilization side, and the cost is saved.
Description
technical field [0001] The invention relates to the field of ships, in particular to a shore-ship integrated power distribution system for non-self-powered ships. Background technique [0002] Since the non-self-powered ships have no generators, they are mainly powered by shore power. The marine AC power supply is generally three-phase three-wire system, while the shore power AC power supply is generally three-phase four-wire system or three-phase five-wire system. If the shore power is directly supplied to the ship, the mismatch of the power system will lead to changes in the connection mode of the power supply system on the ship, and the change in the system connection mode will lead to new problems. In the three-phase four-wire power grid, the three-phase load is generally in a relatively balanced state to ensure the safe operation of the power supply system. However, in the actual process, three-phase load balance is almost impossible to achieve. Especially if there i...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02H9/02H02H9/04H02J3/26H02M5/00
CPCH02H9/02H02H9/04H02J3/26H02M5/00Y02E40/50
Inventor 郑剑张雅丽
Owner JIANGNAN SHIPYARD GRP CO LTD