Shore-based variable frequency power supply system

Abstract

A shore-based variable frequency power supply system in port comprises a variable frequency power supply (C), a port high-voltage substation (A) and a ship power system (H). An input terminal of the variable frequency power supply is connected with the port high-voltage substation; the output terminal of the variable frequency power supply is connected with the ship power system. The power supply system can continuously output a three-phase AC voltage that its voltage can be regulated in a range of 0~6.6kV or 0~10kV and its frequency can be regulated in a range of 0~60Hz. The output side of the variable frequency power supply is connected with a distribution circuit (G) via cable reels (F), the high-voltage output supplies power to the ship power system via the distribution circuit directly, and the low-voltage output distributes power to the ship power system via a step-down transformer (T1). The power consumed by the power supply system is drawn from the port high-voltage substation, thus, the environment pollution and the energy consumption caused by using a ship fuel generator set as a power source can be greatly reduced, and a high quality and high reliable power supply can be provided to the vessels at anchor.

Description

technical field [0001] The invention relates to a port shore-based frequency conversion power supply system. Background technique [0002] With the development of international economy and trade, the world maritime shipping transaction volume is steadily increasing year by year. As one of the world's major shipping countries, China means that more shipping ships will call at Chinese ports. Most ships use fuel-fired generator sets as the source of electricity. After the ship berths at the port, the auxiliary fuel-fired generators on board continue to operate to supply power to the ship's load. As a chemical fuel, fuel oil will produce a variety of harmful gases during its energy conversion process, such as nitrogen oxides (NOx), sulfur oxides (SOx), and fuel combustion particulate matter. These emissions will have an impact on human health and the surrounding environment, especially the greenhouse gases produced will damage the Earth's ozone layer. [0003] In order to red...

AI Technical Summary

Problems solved by technology

The frequency of AC power in China is 50Hz. If the ship is designed to use 60Hz power, 50Hz power can still be used for some on-board equipment, such as lighting and heating equipment, but for motor-driven equipment such as water pumps, winches and cranes, if it is not possible to use 50Hz power in its Design speed operation will cause the device not to work properly

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