Transient Stability Analysis And Simulation Of Naval Vessel Electric Power System

With the ship to the development of large-scale, automation and intelligent direction, naval vessel electric power system as an important part of modern ships, has become increasingly complex. As the power quality of ship power system is a direct bearing on the safety of navigation and the crew of the ship, controlling quality and operational stability of naval vessel electric power system is particularly important. Naval vessel electric power system as a separate and complex system has degeneration, nonlinear and strong coupling features, making the accurate mathematical model established difficultly. That the traditional control methods usually require a precise mathematical model of the system blocks the pace of modern shipboard power systems forward. For these reasons, a more advanced control system to improve the control performance of naval vessel electric power system is a pressing and arduous task.First of all, establish the mathematical model and simulation model of naval vessel electric power system. Based on the models, using MATLAB simulates PID coordinated control of naval vessel electric power system. Simulation results show that under the PID control the performance indicators are in line with the requirements of<RULES AND REGULATIONS FOR THE CONSTRUCTION AND CLASSICATION OF SEA-GOING STEEL SHIPS> by China Classification Society. But there are still some deficiencies in the adjustment process, such as overshoot large and fluctuations time longer.Secondly, combined advantages of PID control and CMAC neural network control, on the basis of predecessors, sum up one method to meet Naval vessel electric power system performance requirements of the CMAC and PID parallel control design; and against the governor system and excitation system of SPS set up parallel control systems of CMAC and PID.Finally, use the parallel CMAC and PID control system to replace PID controller in the ship power system simulation model. Simulate experiments under various conditions, and analysis the results contrast against the action of the PID controller simulation results. The analysis shows that under the CMAC and PID parallel control system, all of the performance indicators of naval vessel electric power system meet the requirements of the Steel Ship Construction and Classification Rules. In the respect of governor and excitation, the effect of CMAC and PID parallel control system is better than it of the PID controller. In the adjustment process, CMAC and PID parallel control system compared with PID controller has smaller overshoot, shorter settling time, reflecting the CMAC neural network control robustness, access to the initial purpose of the research.