Wideband Modeling of Toroidal Air-Core Reactors Based on Equipotential Conductor Elements and Terminal Capacitance Equivalence

Toroidal air-core reactors (TARs) exhibit significant advantages due to low leakage flux, making them suitable for compact applications, such as offshore wind power platsforms. Establishing a wideband equivalent circuit for TARs enables rapid calculation of transient voltage distribution, thereby assessing whether the existing structure meets insulation requirements. This paper proposes a modeling methodology for the transient voltage estimation of the TAR based on the concepts of equipotential