Research On Ship Shore Power Comprehensive Monitoring And Safety Protection System

Port ship shore power refers to the cessation of power supply from the ship’s auxiliary fuel generator during the berthing of the ship,and the use of onshore power to provide power to the ship.With the increasing emphasis on environmental protection,more and more regions and ports will force the use of ship shore power systems.In order to make the shore power system safe and reliable,and easy to maintain,it is necessary to comprehensively monitor the shore power system,unify the equipment monitoring,safety protection,operation management and other functions of the shore power system to prevent damage to the ship’s power grid and equipment,and maintain the system.Work safely and steadily,and achieve effective system management.The paper studies the comprehensive monitoring of ship shore power system,designs the overall structure of the monitoring system,studies the insulation monitoring method and fault diagnosis method of the shore power system,and designs the integrated monitoring system software.The main research contents of the thesis are as follows:(1)The overall design of the ship shore power integrated monitoring system was carried out.The equipment scope and main monitoring information of the integrated monitoring,the function and architecture of the integrated monitoring system,and the safety protection and fault diagnosis module were analyzed and designed.(2)The insulation monitoring method for ship shore power system is studied.Aiming at the disadvantage that the measurement method of dielectric loss angle based on correlation function analysis method is greatly affected by higher harmonics in ship shore power grid,an improved method based on wavelet filtering higher harmonics is proposed.The wavelet function filters out the higher harmonics and eliminates the influence of harmonics on the measurement accuracy.The simulation results show that the improved dielectric loss angle measurement method is more accurate.(3)The fault diagnosis method for ship shore power system is studied.Aiming at the fault diagnosis of important equipment such as transformers and circuit breakers in the ship shore power system,the improved artificial fish swarm algorithm is used to optimize the parameters of the support vector machine,and the gas content in the oil-immersed transformer oil and the circuit breaker closing coil current are As a fault feature quantity,the fault diagnosis model of transformer and circuit breaker based on support vector machine is established.The simulation results show that the diagnostic model has good accuracy and can be used for fault diagnosis of transformers and circuit breakers in ship shore power systems.(4)Designed the ship shore power integrated monitoring system software.The functional requirements of the ship shore power comprehensive monitoring software system are analyzed,and the ship shore power comprehensive monitoring software integrating integrated monitoring,fault diagnosis and user management is designed.Based on Visual Studio 2012 and MySQL database,the ship shore power integrated monitoring software is designed,including real-time monitoring module,fault diagnosis module and user management module.It can realize real-time monitoring of operating parameters and status of important equipment of shore power system,and faults of corresponding equipment.diagnosis.