Abstract:
It is presented a system for supplying electric power from a main power grid to a plurality of ships moored at a respective berth of a quay. The system comprises a connection point for connecting to the grid supplying electrical power at a first frequency, a frequency converter arrangement for converting electric power from the grid at the first frequency to electric power at a second frequency, a first connector, arranged to provide power from the grid at the first frequency, a second connector, arranged to provide power at the second frequency from the frequency converter arrangement, a plurality of switches, each switch being configured to supply of power from either of the two connector to a respective berth, the system further comprising a plurality of ship connection arrangements connected to a respective switch, each ship connection arrangement being adapted for connection to an electric system of a ship. A corresponding arrangement and method are also presented.
Abstract:
The present invention relates to a system for supplying electric power from an AC power source (AC-PS-1) to ships, each of the ship moored at a respective berth (A, B, C, D) of a quay, said system comprising a rectifier (5), having an AC and a DC side, for converting AC electric power from the AC power source to a DC power, the AC side arranged to be connected to the AC power source, and a plurality of ship connection arrangements for supplying electric power to a respective ship, each of the ship connection arrangements placed at one of the berths and comprising an inverter (11, 12, 13, 14) configurable to output AC power at a first or a second frequency and a ship connector for connecting the ship. The system further comprises a DC distribution network (9) connected to the DC side of the rectifier and the rectifier is placed at a distance from the quay and each of the inverters is connected to the DC distribution network..
Abstract:
A device (8) for charging of an electric vessel (18) includes a three-phase network terminal (T1) for connection to an electrical three-phase alternating current network (N1), at least one vessel connection terminal (T2) for connection to the battery of an electric vessel to be charged, and a voltage conversion arrangement (11) for converting between three-phase AC voltage at the three-phase network terminal and a single-phase voltage at the vessel connection terminal, the voltage conversion arrangement including at least one converter (12, 14) and being controllable for providing bidirectional active and reactive power exchange with the three-phase alternating current network, where the bidirectional active power exchange involves using a connected vessel battery. The invention also relates to a system and a method for charging of electric vessels.
Abstract:
Disclosed is a system for supplying electric power from an AC power source to ships, each of the ships moored at a respective berth of a quay. The system comprises a rectifier (5), having an AC and a DC side, for converting AC electric power from the AC power source to a DC power, the AC side arranged to be connected to the AC power source, and a plurality of ship connection arrangements for supplying electric power to a respective ship. Each of the ships connection arrangements are placed at one of the berths and have an inverter configurable to output AC power at a first or a second frequency and a ship connector for connection to the ship. The system further includes a DC distribution network (9) connected to the DC side of the rectifier (5) and the rectifier is placed at a distance from the quay and each of the inverters is connected to the DC distribution network (9).
Abstract:
An electric plant with a capacity to charge electric batteries is a plant for transmitting electric power comprising a Voltage Source Converter (1), an alternating voltage network (14) connecting an alternating voltage side of the converter and a direct voltage part (7) connected to the direct voltage side of the converter. The converter (1) has a series connection of switching cells (8) having each at least one energy storing capacitor. Electric batteries may be connected in parallel with said capacitor, and the charging state thereof may be influenced by controlling the switching cells of the Voltage Source Converter through a control arrangement (15).