Research on the control strategy of grid connection between shore power supply and ship power grid

Abstract

In order to meet the requirements of smooth connection and gradual load transfer between power supply and ship’s power grid. A control strategy based on an AC/DC/AC converter topology is studied in this paper. Rectification of the grid side by a double closed-loop control model using SVPWM (Space Vector Pulse Width Modulation). The V/f control strategy combined with pre-synchronization control is adopted for grid connection, in order to reduce the shock. A droop control strategy is used after grid connection. Generator gradually exits operation. The output power of the power supply increases gradually. The load is transferred in this way.

Keywords

• AC/DC/AC
• Pre-synchronous control
• V/f control
• Droop control