Fault diagnosis algorithm for ship's integrated power system
In order to solve the problems such as low accuracy of current rise rate calculation and long protection time of DDL protection algorithm for ship integrated power system.Based on the mathematical theory of least-squares curve fitting,a short-circuit fault diagnosis algorithm that can calculate the current rise rate in real time is designed.Compared with the existing DDL algorithm,the new algorithm focus on the rise rate of each fault current's data instead of the average rise rate over a period of time,which im-proves the accuracy of the protection algorithm.Besides,considering the high frequency and hardware properties of FPGA,FPGA re-places ARM DSP for parameter operation to improve the speed and reliability of diagnosis.The experimental and simulation verifica-tion results show that the diagnosis time is reduced from more than 100 μs to 55 μs and limits the peak short-circuit fault current to a smaller range,which effectively ensures the safe operation of the ship's integrated current system.
warships and shipsintegrated power systemfailure diagnosis algorithmFPGA