Development of a New Type of HTS Controllable Reactor With Orthogonally Configured Core

Controllable reactor is widely applied as reactive power compensation device to improve the stability of the power grid. In this paper, a new type of HTS controllable reactor with orthogonally configured core structure has been developed in detail. The basic idea of the reactor is to divide the core into two segments, the working segment on which an ac working winding was wound and the control segment formed by two parallel rectangular magnetic yokes. The dc HTS control windings were wound around the excitation, the impedance of the reactor could be controlled by applying different dc currents to the control coils without the risk of inducing voltage. An optimization algorithm based on the simplified model has been proposed and a prototype has been developed. Laboratory tests were taken under different conditions. Experiment results show that the harmonic content of the inducted current is less than 2% and the adjustable impedance range of the working winding is over 55%.