Analysis of switching transient overvoltages in the power system of floating production storage and offloading vessel

• We develop the models for the complex power system in the floating production storage and offloading vessel.
• A modified method is used to extract the correct parameters for the model of induction machine.
• All the results are analyzed statistically.
• A useful solution is proposed to mitigate the adverse effects of switching transient overvoltage.

Large transient overvoltages can be caused by the switching operation of vacuum circuit breakers (VCBs) during disconnection of induction motors. In this paper VCBs, cables, generators, busbars, induction motors and surge arresters are modeled by making use of ATP-EMTP. Switching transient overvoltages of four typical induction motors under the starting, the full load and the light load working conditions in the power system of the selected floating production storage and offloading (FPSO) vessel are analyzed. A suitable protection against the switching transient overvoltage is proposed and the results are presented accordingly.