Generator protection device based on closed-loop marine power system

Abstract

The invention relates to a generator protection device based on a closed-loop marine power system, which solves the problem of closed-loop power system protection which cannot be realized by the existing protection methods. Each generator protection device collects the data related to the operation state, processes the algorithm according to the power system distribution and the internal model ofthe generator protection device, and realizes the fault monitoring and fault determination of each component in the power system. According to the fault judgement, the executing signal of cutting offthe fault circuit or removing the damaged circuit is output to the actuating element to ensure the continuous power supply of the non-fault circuitso as to achieve the goal of providing electricity for as long as possible from as few generating units as possible; through the action command output by the self-protection algorithm and the in-depth grasp of the working characteristics of the generator set, it is ensured that when the generator set fails or the healthy generator set reaches the imminent fault boundary, only the fault loop is removed as soon as possible to minimize the fault coverage, and at the same time, the selectivity of the system and the continuous power supply of the non-fault loop are ensured to the maximum extent.

Description

technical field [0001] The invention relates to a ship power protection device, in particular to a generator protection device based on a closed-loop ship power system. Background technique [0002] With the implementation of energy saving and emission reduction policies and the rapid development of power system protection technology, the ship industry is paying more and more attention to the application of closed-loop power systems on DP2 / DP3 dynamic positioning ships. Compared with the open-loop power system operation scheme adopted by the traditional DP2 / DP3 dynamic positioning system, it can bring many benefits, such as reducing fuel consumption and exhaust emissions, reducing the operating cost of diesel engines, and increasing the flexibility of dynamic positioning propulsion. But the downside of running the system in close ring / close bustie mode is that it can make the system vulnerable to faults, so any fault like a short circuit fault in the system or a latent fault...

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the problem of improving engine protection by using a closed-loop power operation system for dynamic positioning, and proposes a generator protection device based on a closed-loop ship power system, which includes the basic protection functions of traditional protection devices, and at the same time can identify traditional Relay unacknowledged faults, which provide a redundant system protection concept and can be optionally coordinated with system-level protection schemes

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