Shore to ship converter system for energy saving and emission reduction

In the shipping industry, people are paying more attention on the emission issue of ships. A shore to ship power solution is attractive for port authorities and ship owners as it helps to reduce emissions in ports by connecting ships to the port electricity grid and turn off their diesel engines while at berth to improve air quality, reduce noise and vibrations in port areas. Besides, there are also economical benefits of shore to ship power as costs related to fossil fuel consumption increase. Because most ships operate with 60 Hz electricity whereas local grid in most parts of the world is 50 Hz, shore-to-ship power is required to transfer power between two different grid systems. Although some old technologies such as rotating motor/generator systems are capable to realize frequency conversion, the static frequency converter system has obvious advantages to serve as power supply today for its small size, high reliability, low losses and low civil work requirements. In this paper, PCS 6000, a medium voltage (MV) frequency converter, is introduced. By using the proven converter technologies, the proposed shore to ship power solution can realize the frequency conversion smoothly with power range from 4 MVA to 120 MVA. In this paper, firstly, the background of shore to ship power is introduced, including the overview of shore to ship power related regulations and standards. The technologies of shore to ship power, especially frequency converter system are investigated. The components, topologies and power control methods of the proposed MV frequency converter are presented. Finally, the features of the proposed converter are illustrated.

[1]  P. E. Dev Paul,et al.  A closer look at the grounding of shore-to-ship power supply system , 2009, Conference Record 2009 IEEE Industrial & Commercial Power Systems Technical Conference.

[2]  Herbert H. C. Iu,et al.  Design and Development of Digital Ramptime Current Control Technique , 2011, IEEE Transactions on Industrial Informatics.

[3]  Giuseppe Parise,et al.  Industrial & Commercial Power Systems Technical Conference , 2007 .

[4]  Dev Paul,et al.  Transient overvoltage protection of shore-to-ship power supply system , 2010, 2010 Record of Conference Papers Industry Applications Society 57th Annual Petroleum and Chemical Industry Conference (PCIC).

[5]  P Nelson,et al.  Prevention of Air Pollution from Ships , 1999 .

[6]  TingAn Lee,et al.  High-efficiency large-capacity uninterruptible power supply using bidirectional-switch-based NPC multilevel converter , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[7]  L.J.N. Kirkby.  South-Western Sub-Centre: Chairman's address. Electrical shore supplies to ships in HM Dockyards , 1964 .

[8]  Karl Jivén,et al.  Shore-side electricity for ships in ports: case studies with estimates of internal and external costs, prepared for the North Sea Commission , 2004 .

[9]  Ismir Fazlagic,et al.  Shore-side power supply - a feasibility study and a technical solution for an on-shore electrical infrastructure to supply vessels with electrical power while in port , 2008 .

[10]  D. Paul,et al.  Cold ironing - power system grounding and safety analysis , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[11]  Great Britain. Foreign,et al.  United Nations Framework Convention on Climate Change , 2019, The ‘Earth Summit’ Agreements: A Guide and Assessment.

[12]  Erin H. Green,et al.  Mortality from ship emissions: a global assessment. , 2007, Environmental science & technology.