UPS (uninterruptible power supply) equipment for ships

Abstract

The invention relates to UPS (uninterruptible power supply) equipment for ships, which is mainly composed of a housing, a host and a storage battery, and is characterized in that the bottom part and the back part of the housing are provided with a shock-absorbing spring device; three-level anti-corrosion treatment of abrasive blasting-nickel plating-anti-corrosion paint coating is carried out on the inner wall of the housing; a host circuit is mainly composed of a 24-phase rectifier, a charging and discharging unit, an inverter unit, a static switch and a manual bypass switch; and the host is powered in three modes which are a main power supply, a bypass power supply and a battery pack. Through using the equipment provided by the invention, requirements on such aspects of heat dissipation, shock and impact resistance, three-proofing, electromagnetic compatibility and the like for the UPS equipment in ship environments, requirements for an uninterruptible power supply of shipborne important load equipment are met, and the running stability of system equipment is improved.

Description

technical field [0001] The invention relates to the technical field of marine power supplies, and mainly refers to UPS power supply equipment that continuously provides single-phase 220V, 50Hz high-quality sinusoidal AC power to loads when the AC ship power supply is normal or abnormal. Background technique [0002] The current commercial UPS power supply equipment on the market is mainly used in the indoor environment of land buildings with good environmental conditions. For UPS power supplies used in harsh environmental conditions such as ships, if multiple preventive design measures are not adopted, especially the rectification circuit of the power supply Part, charging circuit part, inverter part, static switch conversion part and electromagnetic compatibility of the box can not better meet the needs of UPS equipment under the existing ship conditions. In addition, the stability of the UPS power supply directly affects the safety and reliability of the ship. [0003] Th...

AI Technical Summary

Problems solved by technology

[0004] 1. The input current distortion rate of the existing power frequency rectifier circuit is above 15%, which will cause electromagnetic environmental pollution

[0005] 2. The existing charging circuit is not perfect for the charging state of the battery, and many of them are single-float charging, which has a great impact on the service life of the battery

[0006] 3. The steady-state characteristics, transient characteristics and harmonic distortion of various types of loads of the existing inverters are relatively large, and there is a certain possibility of damage to the loads

[0007] 4. Most of the existing equipment cannot achieve 0-second switching when the inverter output is converted to the bypass output

[0008] 5. The existing UPS power supply equipment has no treatment and preventive measures for electromagnetic compatibility interference

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