Novel Static Var Compensator Based on Ferrite Orthogonal Core Controlled Reactor

This paper presents a novel static VAr compensator (SVC) based on ferrite orthogonal core (FOC) controlled reactor which has a linear control characteristic. The novel reactor employs harmonic eliminated method of active power filter technique. It combines a voltage source inverter (VSI) and a half bridge circuit. The AC side of the inverter is connected to an aid harmonic elimination winding of the reactor. Its DC side is connected to filter capacitors and the secondary winding of variable inductor through the control circuit based on half bridge circuit. The inverter switches are controlled to shape the current through the filter inductor such that the main current is in the same shape as input voltage, and at the same time supply the real power consumer of control circuit. The controller is based on a conceptually simple control scheme, energy balance concept. In theory, the harmonic current component of the novel controlled reactor is zero. The control characteristic of orthogonal ferrite core controlled reactor was verified by 3D nonlinear reluctance network model use Saber software. Based on the model of harmonic eliminated controlled reactor one static VAr compensator was setup, and the harmonic elimination method and the feasibility of this novel SVC were verified. The new type SVC can be applied in any grade power system because the FOC controlled reactor is consisted of electromagnetic equipment.