Shore Power(3)

AC high voltage shore power connections can be divided into:

1) Barge connection: A barge equipped with a cable winch and transformer is used to connect the shore connection box to the ship's shore power system, using the transformer on the barge to reduce the high voltage shore power voltage to the ship's voltage. This connection method is highly mobile, but the barge is costly in terms of investment.

(2) Mobile connection at the quay: the transformer, frequency conversion equipment and cable reel are installed in a mobile cabin on the quay, and the transformer in the mobile cabin is used to reduce the high voltage shore power voltage to the ship's voltage. This does not require any modification to the existing quay and requires investment in a shore power mobile cabin.

3) Container connection: The voltage reduction power supply unit is placed in a container and lifted onto the ship when in use. The container is equipped with: transformer, high-voltage shore power connection screen, control box, etc.

(4)?Shipboard connection: High-voltage shore power is connected to the ship, and the ship transformer transforms high-voltage shore power into low-voltage for shipboard use, which is convenient for connection and less cable, but requires modification of the existing ship and high modification cost. Ships with shore power systems are marked with the additional AMPS (Alternative Maritime Power Supply) mark on the CCS certificate.

Shore power standards and requirements

In recent years, the technical standards related to shore power have developed rapidly at home and abroad. At present, the shore-based power supply infrastructure in the world's famous ports has been basically completed and can provide the shore power required by merchant ships:

In April 2009, the International Electrotechnical Commission (IEC) first published the pre-standard IEC/PAS 60092-510 describing the general technology of high voltage shore power systems;

In 2011, the IEC published IEC 62613, an international standard for shore power plug-ins;

in 2012, the joint IEC/ISO/IEEE standard IEC/ISO/IEEE 80005-1 for the overall technology of corrected and integrated high-voltage shore power systems was published

In 2016, the technical standard IEC/ISO/IEEE 80005-2 for shore power system communication protocols, data interaction and other aspects was published.

With the promotion and application of shore power on ships in major ports around the world, the International Maritime Organization (IMO) is also stepping up its efforts to develop regulations related to shore power on ships. At present, the major international classification societies have made provisions for the connection and installation of shore power on ships. The American Bureau of Shipping (ABS), the French Bureau of Shipping (BV), the Japanese Classification Society (ClassNK) for high voltage shore power connection issued guidelines, the British Lloyd's Register (LR), the Norwegian Bureau of Shipping (DNV GL), the Italian Classification Society (RINA) also in its ship classification specification reflects the relevant requirements for the installation of shore power system equipment for ships.

With the promotion and application of ship shore power system, China's shore power technology standard development to follow the pace of international standards, in recent years involving ship shore power system national standards, industry standards and local standards have been introduced, such as "steel ships connected to shore power technical requirements" (JT/T 347-1995), "stationary shore power device" (GB/T 25316 (CB/T 4372-2014), Shore Power Boxes (CB/T 4406-2014), Technical Conditions for Shore Power Systems for Port Called Ships Part 1: High Voltage Power Supply (GB/T 36028.1-2018), and the "Technical Requirements for the Connection of Shore Power to Steel Ships" (JT/T 347-1995). (GB/T 36028.2-2018) and Technical Conditions for Shore Power Systems on Ships in Port Part 2: Low Voltage Power Supply (GB/T 36028.2-2018), the Guide for Inspection of Shore Power Supply Facilities on Ships' Shore Power issued by China Classification Society (CCS) came into effect on 1 May 2018, the Test Methods for High Voltage Shore Power (GB/T 37399-2019), "Port Shore Power Cable Arm Lifter" (T/CPHA 3-2020) and "Port Shore Power Cable Upright Lifter" (T/CPHA 4-2020), "Technical Rules for Statutory Inspection of Domestic Sailing Sea Vessels (2020)", the The Maritime Administration of the People's Republic of China on the Release of the Guidelines for the Implementation of the Technical Regulations for Ships (No. 2 of 2021) Guidelines for the Inspection of Shipboard Installations of Shore Power Systems, etc.

It is worth mentioning that: China's Guidelines for Safe Operation of Shore Power on International Vessels submitted to the International Maritime Organization (IMO) in June 2017 were adopted at the MSC 103 (May 2021) meeting as the international industry guidelines for shore power operation.