Research On Ship Power Management System Based On Multi-bus Redundancy Mechanism

Ship industry is an important part of the shipbuilding industry,whose development level affects the ship industry's comprehensive competitiveness directly.China is a big shipbuilding country,however there is a long-term gap between domestic ship technology and products with the international advanced level.The authorities has emphasized to support the development of shipping industry in recent years.Therefore,the research and development of the leading domestic and international advanced level of the new ship power station PMS system,creating Chinese own brand and participating in international competition are imperative.This dissertation aims to develop a set of the ship power station power management system(PMS),using hierarchical structure to build a PLC as the upper main controller,and embedded system is implemented for the underlying controller of the two-tier control system.The hierarchical structure,which was the upper layer with TCP/IP Ethernet,and the bottom of the double CAN bus with redundant mechanism,was adopte.In the different upper PLC system:Profibus to CAN,Canopen to CAN and Modbus TCP to CAN,protocol converter was used to achieve communication between the upper main controller and the bottom controller.The main contents of this paper are discussed as follows:(1)The power management system principle and system design.Firstly,the basic principle and function of PMS system were introduced,and then the overall layout design of the system was carried out according to the basic functional principle.Secondly,the hardware and software of the upper controller of the system were designed in detail.Finally,the main controller of the bottom platform was designed.(2)The network communication and protocol conversion of multi-bus redundancy mechanism.Based on the design of the hardware network architecture of PMS system,CAN to PROFIBUS_DP protocol converter,CAN and CAN application layer CANOPEN data link design and CAN/MODBUS_TCP protocol were developed for different manufacturers PLC with different bus protocol.(3)The design of intelligent I/O module based on the embedded platform.The I/O acquisition board was designed with the dual CAN bus,which included the 24V digital input,the 24V three-contact relay output,the 0-10V analog voltage acquisition and the 4-20mA current acquisition,0-10V analog voltage output,the 4-20mA current loop output and PT100 temperature Collection.(4)The HMI and touch screen design.HMI included PMS overview interface,switch board alarm point interface and so on.The FLEXEM F007 touch screen was adopted in the intelligent motor management and control system(IMCC),which mainly provided the harmonic parameter monitoring and various protection setting.(5)Prototype machine verification.The system hardware and software prototype platform were set up to test and verify.The verification of the entire data processing process execution time for different main controller PLC with multi-protocol converter,CAN-IO acquisition module and HMI interface were carried out in the prototype machine,which results showed that the real-time exactly met to the technical requirement of this project.