A Marine Intelligent DC Bus Tie Controller

Abstract

The invention discloses a marine intelligent DC bus-couple controller, which comprises a water-cooling frame, and left and right water channels arranged inside the water-cooling frame, wherein a plurality of cable joints are arranged on the front surface of the water-cooling frame, an accommodating cavity of the water-cooling frame is internally provided with a main switch circuit assembly, an L-shaped laminated busbar, a pre-charging capacitor assembly, a negative busbar, larboard and starboard positive busbars, a current-limiting water-cooled electric reactor, a freewheeling loop assembly and a control assembly, the main switch circuit assembly is communicated with the left water channel, and the current-limiting water-cooled electric reactor is communicated with the right water channel.According to the marine intelligent DC bus-couple controller, the water-cooling frame is internally provided with the left and right water channels having waterway inlet and outlet, thereby reducingpipeline connection and being beneficial to heat dissipation; the number of layers of the L-shaped laminated busbar is few, and the stray inductance of the electric loop is small; the main switch circuit assembly and the pre-charging capacitor assembly are directly connected with the L-shaped laminated busbar, thus the structure is compact, the size is small, the energy density is high, and the layout form is beneficial to heat dissipation through natural convection; meanwhile, the number of interfaces of the whole bus-couple controller is small, the assembly is convenient, the size is small,the cost is low, and the disassemble and maintenance are very convenient.

Description

technical field [0001] The invention belongs to the technical field of power electronic equipment and marine DC power distribution system fault protection, and in particular relates to a power electronic controller capable of quickly monitoring short-circuit faults in a DC system and capable of microsecond-level segmental short-circuit current. Background technique [0002] In the ship's DC power distribution network, once a short-circuit fault occurs in the system, other capacitive devices such as hanging grids or power supplies will feed power to the short-circuit fault point. When the response of the protection device is slow, a large short-circuit current will be generated. At the same time, if the capacitive equipment should be quickly discharged to reduce the DC bus voltage, the equipment will not work normally and the system will fail. [0003] In traditional marine DC power distribution systems, mechanical circuit breakers are usually used to protect the power grid, ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to design a marine intelligent DC bus-tie controller with short-circuit quick breaking capability according to the deficiencies of the prior art, to solve the problem of low integration of power modules of the existing bus-tie controller, complex cooling system, device installation and disassembly Difficult, large volume, low power density, serious electromagnetic radiation, high manufacturing cost, etc.

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