Shore-based variable frequency power supply system

Abstract

The invention relates to a shore-based variable frequency power supply system, which comprises a variable frequency power supply, a port high voltage transformer substation, and a marine power system, wherein the input end of the variable frequency power supply is connected with the port high voltage transformer substation; the output end of the variable frequency power supply is connected with the marine power system; and the power supply system can continuously output three-phase alternating current with a voltage adjustment range of 0-6.6 kV or 0-10 kV and a frequency adjustment range of 0-60 Hz. The output side of the variable frequency power supply is connected with a distribution line via a cable drum, the output high voltage directly distributes power for the marine power system via the distribution line, and the output low voltage passes through a step down transformer and distributes power for the marine power system. The shore-based variable frequency power supply system disclosed by the invention has the advantages that: the power used by the power supply system is derived from the port high voltage transformer substation, so environmental pollution and energy consumption caused by taking a marine fuel generator unit as a power source are greatly reduced, and a high-quality and high-reliability power supply is provided for 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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