Study On Stability,Energy Saving&Emission Reduction Of Ship Power System With Renewable Energy

In research of current international energy, environmental pollution and fossil energy consumption has become an increasingly prominent problem, which leads to a growing oil price in shipping. However, demand of sea transportation may be increased by 3% per year,the CO2 emission from it will be more and more. Ship energy efficiency and pollution reduction proves to be an important issue. Due to the advantage of improving energy efficiency, reducing pollution emission and high economic benefits, renewable energy, such as solar and wind, can be a promising way. In recent years, many countries are doing research on introducing renewable energy to ship power system.Unlike on land,ship using solar and wind energy will face more serious problem. As a"moving micro grid" working in isolated island operation,ship moving shows great impact except for its original uncertainty on land. In response to this,a suitable size of energy storage is necessary. Besides, an evaluation system for benefits analysis is needed.For the study of stability on ship power system with solar and wind, PSCAD simulation models of each part are firstly developed, including PV array and MPPT control, Permanent Magnet Direct-driven Wind Generation System, grid-connected inverter, Diesel Generation System, ship power system load and Flywheel Energy Storage System(FESS) with charge/discharge control, etc. Then transient in system with PV only and hybrid system with PV/wind are analyzed, which are specifically consist of load change, PV/wind system incorporated into and out, solar irradiation and wind speed change, ship rolling, etc. Besides,dynamic compensation of FESS are also simulated.Because of the different advantages in power efficiency, reliability, pollution emissions and economic benefits between ship power system with PV and traditional configuration, an evaluation system for large oil tanker with application of PV array is developed. It is based on AHP-Fuzzy Method.Finally, through system transient analysis and evaluation case study, the feasibility and benefit of ship power system with PV/wind have been proved. Simulation results show that FESS can have great contribution to improving ship power system stability when introducing PV/wind system.