Fault ride-through system and ride-through method of vessel direct-current networking electric propulsion system

Abstract

The invention discloses a fault ride-through system and ride-through method of a vessel direct-current networking electric propulsion system, and solves the problems that the oil consumption is high and the use rate of fuel is low caused by the condition that when a vessel propulsion system is under a low-power running state, a diesel generating set and a spare diesel generating on the vessel still need to keep a joint working state. The fault ride-through system comprise a first diesel generating set (1), wherein the first diesel generating set (1) is connected with a public direct-current bus (5) through a first rectification frequency converter (2); a main propulsion motor inversion frequency converter (6) and a side propulsion motor inversion frequency converter (9) are separately connected to the public direct-current bus (5); a chopper (15) is connected to the public direct-current bus (5); and a super capacitor set (16) is connected to the input end of the chopper (15). According to the fault ride-through system disclosed by the invention, under an underload running condition of the vessel, fault ride-through of the diesel generating set can be realized by super capacitors.

Description

technical field [0001] The present invention relates to a ship direct current network electric propulsion system, in particular to a ship's direct current network electric propulsion system capable of realizing fault ride-through system of a diesel generator set and a ride-through method thereof. Background technique [0002] At present, the electric propulsion system of the ship has begun to adopt a DC network electric propulsion system, which is composed of a diesel generator set, a public DC bus, a frequency converter and a propulsion system. The ship's diesel generator set not only supplies power to the ship's daily electrical load, but also supplies power to the ship's propulsion system. When the ship's propulsion system is in a low-power operating state, in order to reduce fuel consumption and improve fuel utilization, generally only one diesel generator set on the ship is turned on to supply power to the ship's propeller and ship's daily load. When a diesel generator...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a fault ride-through system and a ride-through method for a ship's DC network electric propulsion system, which solves the problem that when the ship's propulsion system is in a low-power operating state, the diesel generator set and the standby diesel generator set on the ship still need to maintain The technical problems of high fuel consumption and low fuel usage rate caused by the joint working state

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