Analysis of Operating Characteristics for Marine Gas-Electric Hybrid Power System

Natural gas has been widely used in transportation and power generation due to its abundant reserves and high efficiency and cleanliness. However, the natural gas engines used to power ships have problems such as slow dynamic response and high gas consumption at low loads. Gas-electric hybrid systems are used in the field of marine hybrid power to investigate the superiority of response performance compared to the natural gas engine. A parallel hybrid power system simulation model was established using the idea of modular modeling. The marine hybrid power system mode switching control strategy was designed and verified by simulation. The tests were carried out on a test stand. The results show that the combined driving method of natural gas engine and permanent magnet synchronous motor can achieve dynamic compensation and shorten dynamic response time of natural gas engine during transient process. It can make the natural gas engine always run in the high efficiency zone under different working conditions. The results of the research are instructive for the selection and matching, design and optimization of energy management system about marine gas-electric hybrid power.