Multifunctional marine shore power supply system
A technology for ship and shore power, which is applied to conversion equipment that converts to DC in the middle, and conversion equipment that can be converted to DC without intermediate conversion. It can solve the problem of high equipment cost, no ship-shore instant communication function, and operation Cumbersome process, etc.
Inactive Publication Date: 2012-02-15
TIANJIN PORT ELECTRIC POWER
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Problems solved by technology
[0005] The topological structure of the existing shore power equipment adopts the "point-to-point" mode, and each berth is equipped with a set of shore power equipment. Since the optimal utilization rate of the port terminal is 60%, the equipment is idle for 40% of the time, which increases investment and equipment. High cost and not conducive to widespread use
The operation process of the existing shore power equipment to connect the ship to the mains is cumbersome and time-consuming, which affects the production operations of the port and wharf
In addition, the existing shore power equipment does not have the ship-to-shore instant communication function, and ship personnel cannot see the real-time working conditions of the shore power equipment
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[0016] In the present invention, the input terminal of ship shore power supply equipment is connected to the power supply, that is, the medium voltage 6 (10) KV feeder of the substation, and the power supply is connected to the 24-pulse phase-shifting transformer through the first switch, and the 24-pulse phase-shifting transformer is 5 Winding transformer, one set on the primary side, four sets on the secondary side, the transformation ratio is 6(10)kV / 0.71kV.
[0017] The output of the four sets of secondary side coils of the 24-pulse phase-shifting transformer is four rectification branches, and each rectification branch is output to a unified DC busbar through a load isolation switch and a rectification circuit (that is, the rectification device in the figure). Three inverter branches are respectively drawn out from the DC busbar.
[0018] The four rectification branches work at the same time, which can provide a large-capacity DC output. The three transformer branches are...
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The invention discloses a multifunctional marine shore power supply system, which comprises input ends connected with a power supply and output ends connected with ships, a first switch, a phase-shifting transformer, four parallel rectification branches and three parallel transformation branches are sequentially connected between the input ends and the output ends through circuits, and the output ends of the three transformation branches serve as the output ends connected with ships. The multifunctional marine shore power supply system solves the defect that conventional shore power systems only can realize 'point-to-point' topological structures, realizes a 'one-to-many' topological structure, and solves the problem that conventional systems cannot be widely popularized. The multifunctional marine shore power supply system shortens the time of the process of connecting ships with shore power, and can be conveniently operated and popularized on ships and in ports, and a touch display screen also can be arranged on a ship, so that the instant working condition of the whole system can be seen and the instant communication between the ship and the shore can be facilitated.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a power supply device for providing shore power to ships in port. Background technique [0002] Ship shore power technology is a power supply technology that uses the power provided by the port power grid and turns off the ship's own generator during the ship's berthing operation. The mains network in mainland China is: medium voltage 6-10kV, low voltage 380V, frequency 50Hz, most ships use 440V, 60Hz, a few ships use 380V, 50Hz, and there are very few Quantity Ships use 6-10kV, 60Hz electrical system. Since the power system of the ship is different from that of the mains network in mainland China, it is necessary to convert the voltage and frequency of the power of the mains network before it can be used by the ship. [0003] Several key technical points of ship-to-shore power supply equipment are: topology design, ship-to-shore grid connection technology, and ship-to-...
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IPC IPC(8): H02M5/42H02M5/10
Inventor 王大伟张明江杨学文赵殿波宋国起赵宁孟凡强佟东海
Owner TIANJIN PORT ELECTRIC POWER