Composite power supply with functions of shore power and energy feedback

Abstract

The invention discloses a composite power supply with functions of shore power and energy feedback, and the power supply comprises a rectifier, an inverter, a change-over switch, and a controller. The controller controls the change-over switch to connect a shore power output circuit when an electric load on a ship operates, controls the inverter to carry out inversion output of an alternating current with the same voltage and frequency as a shore power supply, outputs the alternating current to the ship through the shore power output circuit, and supplies the alternating current to the electric load on the ship. When the electric load on the ship stops, the controller controls the change-over switch to connect a power grid output circuit, controls the inverter to carry out inversion output of an alternating current with the same frequency, phase and amplitude as a grid power supply, and enables the alternating current to be merged into a power grid through the power grid output circuit. The composite power supply enables the shore power supply and an energy feedback power supply to be composited into one power supply, thereby enabling the power supply to have the functions of shore power and energy feedback, reducing the unnecessary energy waste while guaranteeing the normal power utilization of a ship at a harbor, and achieving a remarkable energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of AC power supply equipment, and in particular relates to a composite power supply that can integrate a shore power supply and an energy feedback power supply into one device. Background technique [0002] At present, when the vast majority of ships are operating at sea, the electric energy generated by the diesel generator set configured on the ship is used to supply power to the electrical loads on the ship. Since the diesel generator set will generate a large amount of exhaust gas during operation, it will cause serious pollution to the environment of the port area when the ship is docked at the dock. In order to protect the environment of the port area, the existing solution is "oil-to-electricity technology", that is, "shore power technology". [0003] Shore power technology means that when the ship is docked at the dock, the operation of the diesel generator set on the ship is stopped, and the power ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of waste of electric energy in the existing shore power supply when the electric loads on the docking ships stop running, the present invention proposes a composite power supply with both shore power and energy feedback functions. When the electric load on the ship in port needs electricity, it can be used as a shore power supply to supply power to the electric load on the ship; when the electric load on the ship stops running, the remaining electric energy of the shore power supply can be fed back to the grid , to solve the problem of energy waste

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