Research On Key Technology Of Shore Power And Its Application

Ship shore power technology is to allow vessels equipped with special equipment on the berth wharf side access during the land needed for the power grid, water pump, communication, ventilation, lighting and other facilities of the power supply from the shore, thereby closing the diesel generator itself, reduce exhaust emissions, and terminal power supply system of the ship after, can to eliminate the noise pollution generated by power generator operation, reduce noise nuisance problems, this is not only an important measure for the sustainable development of the port, but also to improve the port environment issues, environment-friendly city construction, promote the harmonious development of city and port and has the practical effect of the significant measures, with great social impact. Ship berthing when directly connected with port land power, can greatly reduce reduced by Hong Kong ship power system operation and maintenance costs, greatly improve the energy utilization efficiency, and has good economic benefits.The based on the analysis of domestic and foreign ports ship shore power system application, introduces the ship power system characteristics and development, describes the ship shore power system arranged in the port of energy-saving emission reduction and environmental protection significance and necessity, shore power technology power supply does not match, power supply mode is not unified problem are analyzed and put forward opinions and problems of existing ship shore electric transformation scheme; this study by the Hong Kong ship variable-frequency shore power technology, the common port grid 50Hz power system of alternating current for berthing of ships to 60Hz power of AC with, and can achieve 50Hz/60Hz arbitrary power system of the power supply. Shore based seamless connection of ships in port on the shore of port shore power supply system harmonic compensation and harmonic compensation using static compensation, but also the dynamic compensation, according to the electric power supply to the docked at the port of ship power grid caused by harmonic pollution problem to Hong Kong on electric power load suddenly changes, the various forms of berthing ship shore electric system technology optimization of berthing ship shore power technology for the in-depth study, gives the main circuit, drive circuit and protection circuit design principle, the realization of the shore based power source and the ship power system, the power supply safe and reliable power supply.