Research On EMS/SCADA System For Seafloor Observatory Network Of Constant-Current Power Supply

The development of seafloor observatory network technology is of great value to the ocean exploration,which can achieve real-time and long-term observation in a wide range of ocean areas.Due to the excellent fault resistance and robustness,seafloor observatory network of constant-current power supply will become one of the important means of future ocean observation,especially in the marine disaster and ocean military defense.In this thesis,the electric energy management and monitoring system as a key subsystem of constant-current power supply of seafloor observatory network,combined with the characteristics of constant-current technology,developed a set of low power consumption,small volume and high reliability EMS/SCADA system.The system can realize distribution management of electrical energy and communication of equipment,real-time monitoring of equipment status,and fault protection function etc.The subject research content is divided into seven chapters for a comprehensive introduction.Chapter one:The overview of typical seafloor observatory networks at home and abroad were briefly introduced,the existing submarine power supply technology were compared with,and the research content of the thesis was given,which Focused on the implementation of single node system and preliminary theoretical analysis of multi-node system.Chapter two:Detail overall demand and the function of system were analyzed,the overall program were planned,the overall EMS/SCADA system were designed with the hardware and the software,and the sub schemes were introduced,such as the power transmission,network communication,time synchronization.Chapter three:The hardware design and function realization of the system was introduced.The hardware function needs were analyzed and all hardware function modules were designed,including the core control module,time synchronization module and peripheral auxiliary circuits(electrical connection/data acquisition/fault protection),and according to the different functions of the object,the function of each module were integrated designed.Chapter four:The software design and function realization of the system was introduced.The software function needs were analyzed and the software function modules were designed with TwinCAT and WinCC.The monitoring software was designed by WinCC,the data was came from TwinCAT by OPC Server and displayed on the PC HMI.Chapter five:The optimization of the extended system was discussed.the topology structure was determined through the analysis of the topological reliability,the hardware&software redundancies were designed.BU state estimation of multi-node system was analyzed by WLS algorithm,which provide a basis for further research.Chapter six:Laboratory tests based on the design of the software&hardware system were performed.After testing the individual modules,the system joint debugging was performed.The success of all tests proves the reliability and practicability of the system.Chapter seven:A summary of the research has been given,and the follow-up research work was discussed.