Research On Modeling And CMAC Control To Medium Voltage Power System Of The Ship

Nowadays, as the development of marine electrical,there need more and more electrical equipment, lead to a surge in power system load. While traditional low voltage system can’t satisfy the growing demand of electricity and power.So raising the voltage grade of power system to achieve efficient allocation of the power system has become the development direction of ship power system. Because of its high efficiency and economy, medium voltage power system has been widely used in the design of large ship. Application of medium voltage power system also makes the control requirements of the power system improved, so need to try a new control mode to meet the demands of control precision.With the progress of the development of computer technology and control theory, intelligent control mode is increasingly used in control system. Due to the nervous system has memory and storage performance, become a hotspot in the field of intelligent control and CMAC neural network is a kind of local approximation of neural network, it can store information classification, and it owns local generalization ability, can get nonlinear approach in a certain range, it has instant reaction that makes it suitable for real-time control. It has adaptability and easy to software implementation, can undertake program written by MATLAB and VC. Therefore the thesis chooses this method.Firstly, the thesis establishes the mathematics model of each part and set up the relevant simulation model based on SIMULINK software; finally, taking coordination control simulation tests on marine power system, which is under the control method of PID and the control of CMAC-PID respectively. The results show that CMAC-PID controller has a better effect. In terms of speed govern, CMAC-PID is fast and the wave is smaller; in terms of excitation, time for terminal voltage tends to stable is shorter.The CMAC-PID control is a feasible attempt. CMAC control realize feed-forward control and ensure the rapidity of system control and robustness, PID control realize the feedback control to ensure the stability of the system, thus make better control of medium voltage power system, improve the stability of ship power system.