Sensitivity analysis in the transient recovery voltage in an industrial power system✰

Abstract

Transient Recovery Voltage (TRV) is one of the electromagnetic studies which shall be carried out to verify if the circuit breakers can withstand the transients imposed by the electrical system. Normally, the transient studies are performed only at the final phases of the electrical system design and if a problem exists mitigation measures shall be taken. In some cases, these measures imply in more costs and physical space in the electrical substations. In offshore units, the weight and space intended to be used are limited and if mitigation measures are necessary, it is important to know them as soon as possible. Therefore, this paper aims at verifying the influence of certain parameters on the transient recovery voltage of an industrial offshore electrical power system. Simulations are performed in a typical offshore installation and the effects on the different voltage levels (13.8 kV and 4.16 kV) are analysed. The results are intended to give a first approximation of the main parameters that affect the peak and rate of rise of the transient recovery voltage during the initial phases of the electrical system design.