Simulation Analysis And Optimization Of Cruise Integrated Power Grid Based On Hybrid Energy Storage

Cruise power grid is an important part of cruise,which is very important for continuous and reliable power supply,normal operation of equipment and improvement of power quality.As the size of the cruise ship increases,the capacity of motor and power station in cruise power system is increasing,and the control,management and automation of power supply and distribution in cruise power system are getting higher and higher.At the same time,the propulsion load is an important load occupying most of the power station capacity.When its operating state changes,it will cause large fluctuations in power and voltage,affecting the stability of the cruise ship power grid and power quality.Therefore,it is extremely important to simulate and analyze the operation characteristics of the cruise integrated power network when the working condition changes.In view of the above problems,this paper introduces a hybrid energy storage system consisting of supercapacitor and battery in the cruise integrated electric propulsion system,which can suppress the power fluctuation of the cruise integrated power grid by charging and discharging energy-type and power-type energy storage elements,and improve the stability and power quality.Firstly,according to the actual operation principle of each part of the cruise ship,the mathematical model library of the cruise integrated electric propulsion system from the power generation end to the load propulsion end is established.the working principle of supercapacitor and battery is studied,and the model structure of hybrid energy storage system suitable for cruise integrated electric propulsion system is determined.The mathematical model is integrated into the modular simulation platform of cruise integrated electric propulsion system by using Visual Studio 2010 and database software through C++ language programming.It lays a foundation for the simulation analysis of the actual operating characteristics of the cruise integrated electric propulsion system.Secondly,build a cruise ship integrated power grid system structure,the simulation analysis of typical operating conditions,large disturbance of propulsion load and three-phase short-circuit fault of cruise integrated electric propulsion system is carried out.The unstable problem of DC bus voltage is found.The hybrid energy storage system is introduced to weaken the influence of fluctuation at the back end,improve the stability of DC bus voltage and performance index.Thirdly,according to the topological structure of cruise integrated power grid,the installation location of hybrid energy storage system is determined,and the structure of hybrid energy storage system is designed.Considering the energy complementary characteristics of energy storage elements,power distribution is adopted by low-pass filtering,combined with fuzzy PI charging and discharging control.Strategy to achieve accurate and efficient energy management of hybrid energy storage systems.Finally,the simulation results of typical working conditions,large disturbance of propulsion load and three-phase short-circuit fault of cruise integrated electric propulsion system with hybrid energy storage show that hybrid energy storage system can significantly improve DC bus voltage stability under three working conditions,and the effect is better than the single capacitor energy storage method using the conventional algorithm...