Research On Key Technologies Of Partial Porous Externally Pressurized Gas Bearing

In recent years,with the increasing number of shipping business,the problem of pollution ships brought is becoming more and more serious.Realize the energy conservation and emissions reduction of the port,build the "green port" and improve the competitive ability of the port,using the shore power technology for ship will have broad prospect of popularization and far-reaching significance.Research on the key technology of ship shore port power.Compared with the analysis of the power supply modes of shore power.Studied the large capacity dual-frequency power supply technology of port ship shore power.The technology can provide port ship with 50 hz / 60 hz dual-frequency power,and can respectively measure these two electric system accurately.Based on this technology,a new ship shore power system is proposed,this system can change our country's port AC into another AC which can be adapted to different frequency and different di stribution voltage level both domestic and overseas.And satisfy different power supply requirements from different ships.A shore power voltage automatic adjusting technology is proposed,this technology makes dynamic property and static property of the shore power output voltage much more excellent.An algorithm is put forward which is through rapid fine-tuning shore power output voltage phase and amplitude to suppress the reverse power.This algorithm is able to suppress the reverse power effectively,try to realize the seamless switching of shore power system during cut in and cut out.Research the business operation mode of port ship shore power.The port ship shore power business mode of “government support with grid corporation investment with port users operation” is proposed,this mode has an important significance to the popularize of port shore power technology.Based on the above research,applied the port ship shore power technology and business mode in Ningbo Zhoushan port,and analyzed the economic and social benefit of this project,it turned out that it brought considerable economic benefit to grid corporation,the port side and the ship side,reduced greatly the emission during ships in the port and improved effectively the ports' environment quality.