Fault Diagnosis Of Ship Relay Protection System Based On Bird Swarm Algorithm

Aiming at the problem that the ship's power distribution system causes the abnormal operation of the relay protection device due to the large current during the transmission of electric energy,a fault diagnosis method for the ship's power distribution system is proposed to determine the actual fault condition.The method considers the refusal and misoperation of the circuit breaker.Based on the analysis of the ship's power grid architecture and the existing analytic model of the power grid,the analytic model with weights is proposed and the improved bird swarm algorithm is used.Complete the iterative solution of the analytical model to obtain more accurate fault diagnosis results.This paper first introduces the development history and research status of relay protection technology and fault diagnosis technology for marine power system,and points out the research significance of such technology.With reference to the existing literature and analysis of the existing ship power distribution system grid architecture,and pointed out several device numbering methods;introduced the operating principle of the relay protection device,and digitally defined the circuit breaker and protection.Secondly,the principle mechanism of the bird swarm algorithm is explored.Firstly,the traditional bird swarm algorithm can not jump out of the local optimal solution under various test functions.Firstly,it is hoped to introduce the Levy flight mechanism to update the position information of the bird producers.In order to improve the global search ability and convergence accuracy of the traditional bird swarm algorithm.The introduction of Levy flight mechanism does improve the global search ability of the bird swarm algorithm,but it is based on the premise of sacrificing the stability of the bird swarm algorithm.To this end,based on the Levy bird swarm algorithm,a damping condition is introduced to suppress some long-distance jumps during Levy flight,and a series of related simulation experiments are done.Subsequently,the binary mapping of the damped Levy bird swarm algorithm was completed with reference to related literature.Then,the traditional grid analysis model is studied and studied.The traditional grid analysis model may cause multiple solutions and misdiagnosis of the diagnosis results.An improved grid analysis model is proposed under the ship distribution system architecture.The fault diagnosis analysis of the specific example under the ship's power distribution system is carried out by the binary damping Levy bird swarm algorithm.Finally,the data communication between the transport layer and the sensing layer is completed under the operating system based on VxWorks.At the same time,using the C# language and Matlab for mixed programming under the Windows-based operating system,the application layer visual fault diagnosis software is built.