Abstract

This paper describes a variable inductor and its application to a power controller for use in an electric power system. First, we present an orthogonal-core-type variable inductor and a three-phase 6.6 kV-100 kVA reactive power compensator using orthogonal cores. In addition, applications to power apparatuses such as a series compensator and a phase shifter are described. Next, we introduce a novel EIE-core-type variable inductor designed for a larger capacity. The operating characteristics of a trial 6.6 kV-300 kVA reactive power compensator are presented. Finally, we present a method of calculating the operating characteristics of the variable inductors based on a method of three-dimensional nonlinear reluctance network analysis (RNA) proposed by the authors.

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