Microgrid system with shore power and its power regulation method

Abstract

A micro grid system containing a shore supply and a power regulation method thereof are provided. The micro grid system includes a port substation, a point of common connection (PCC), a shore supply communication center, a micro grid energy management system, a plurality of energy storage units connected in parallel, a photovoltaic unit, and a wind power unit. The micro grid energy management system collects the state of charge of the energy storage units and the power generation prediction information of the wind power unit and the photovoltaic unit, synthesizes the state of charge and the power generation prediction information, and sends corresponding scheduling instructions to the energy storage units, the wind power unit and the photovoltaic unit so as to adjust the generating capacity. Under the support of energy storage equipment, the shore supply is self-supported and powered with high quality by nearby new energy. The micro grid energy management system has the ability of multi-objective operation planning, so that the micro grid can be switched among a no-ship state, a ship docking preparation state, a ship docking state and a ship departure preparation state, and the renewable energy inside the micro grid can be scheduled.

Description

technical field [0001] The invention relates to a technology in the field of electric power system control, in particular to a micro-grid system including shore power and a method for regulating electric energy thereof. Background technique [0002] When the ship is docked at the dock, it uses the ship's diesel generator to provide itself with electrical energy. However, diesel generators have low efficiency and will emit a large amount of air pollutants. At the same time, they will cause serious noise pollution near the wharf. Shore power technology, as an alternative technology of electric energy, can supply power to ships docked in the port, thereby reducing the environmental pollution and noise pollution caused by ships to the port. The shore power system is built on the port wharf and consists of shore power transformers, electronic static shore power supplies, underground cables, terminal shore power junction boxes, connecting cables and ship shore power equipment. T...

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Problems solved by technology

[0004] The present invention is aimed at the fact that the existing technology cannot realize the effective response and dispatch to the ship load fluctuation; it cannot realize the high utilization of new energy when the ship is not berthing; low, low economic benefits, etc., a micro-grid system with shore power and its power regulation method is proposed, using new energy near the shore power system, and with the support of energy storage equipment, the self-sufficiency and power of the shore power system can be realized. High-quality power supply; and the energy management system of the microgrid has multi-objective operation planning capabilities, which enables the microgrid to switch between the no-ship state, the ship-docking preparation state, the ship docking state and the ship departure preparation state, and dispatch the renewable energy in the micro-grid. energy

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