Method for supplying external energy to electrical on-board power networks of ship involves converting frequency and voltage differing for on-board power networks into frequency and voltage same as on-board power network

摘要

A current with a frequency and a voltage differing from that of the on-board power network is converted into the current with the frequency and the voltage same as that of the on-board power network using pulse width modulation (PWM) converter (7). The on-board power network and an external current source are continued to be operated with predetermined different voltage and frequencies until the external current source disconnected.