Ship protection system for high-power-ratio special-shaped unit mixed use occasion

Abstract

The invention relates to a ship protection system for a high-power-ratio special-shaped unit mixed use occasion. The system is divided into an upper layer, a middle layer and a lower layer, the upper layer is a power station control layer and communicates with a lower protection execution layer through a CAN local bus in a station control layer network, and the middle protection execution layer is a ship protection system execution unit. The protection execution layer issues a specific execution instruction to an execution element of the lower electrical layer, and collects on-off state information of the electrical layer; and the protection execution layer comprises a comprehensive protection device, an interval merging unit and a centralized control unit. Multiple groups of protection constant values can be switched according to ship operation conditions, and the protection configuration difficulty is reduced; and the sensitivity and selectivity of protection configuration can be met aiming at a high-power-ratio special-shaped unit mixed use occasion.

Description

technical field [0001] The invention relates to a control technology of a ship system, in particular to a ship protection system for mixed use of special-shaped units with high power ratio. Background technique [0002] At present, the marine comprehensive protection device has realized the full digital mode, and generally has protection functions such as differential protection, over-current protection, voltage protection, zero-sequence protection, and frequency protection. For various protection objects on board, such as generators, transformers, bus couplers, jumpers, lines, loads, etc., protection schemes are equipped as needed. The ship protection system is currently completed by the comprehensive protection device using the setting mode of "pre-setting, real-time action, and regular inspection", and each comprehensive protection device completes the protection function of this node independently of each other. Ships have multiple operating modes. When part of the powe...

AI Technical Summary

Problems solved by technology

In addition, for the ship protection system with mixed use of special-shaped units, due to the large difference in unit capacity, the protection scheme of a single constant value group cannot meet the protection selectivity and sensitivity requirements.

However, the existing ship protection system needs to use manual methods to switch protection or modify the setting value, which is not only time-consuming, but also puts the power grid under an inappropriate protection system, resulting in a serious drop in power supply reliability.

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