Abstract
The use of variable frequency drives (VFD) in floating, production, storage, and offloading (FPSO) units provides well-known benefits to the power system, such as: soft-starting of motors, increase of the energy-efficiency, reduction of the short-circuit current, and enhancement of the load shedding capability. The VFDs with passive front-end rectifier are the most commonly used due to their wider commercial availability and lower cost compared to VFDs with active front-end rectifiers. However, the latter can control the exchange of reactive power with the grid, which may contribute with the regulation of the power factor at the main feeders. This paper provides a case study of Production operation mode of a FPSO unit with two VFDs connected to the largest motors, considering VFDs with passive and active front-end rectifiers.
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