Patent ID: 6384581
Filing Date: 2002-05-07
Classification: H02J,Y02E

Abstract:
A limited-angle power flow transformer for implementing power flow control in a transmission line of an n-phase power transmission system, each phase of the power transmission system having a transmission voltage, the transformer comprising:n primary windings, each primary winding on a core, each primary winding for receiving the transmission voltage of a respective one of the phases of the power transmission system; m secondary windings on the core of each primary winding for a total of m*n secondary windings, m being less than n, each secondary winding for having a voltage induced thereon by the corresponding primary winding, for each phase, m secondary windings being assigned to the phase, each assigned secondary winding for the phase being from a different core, for all phases, the secondary windings being assigned from the cores in a balanced manner, for each phase, the secondary windings assigned to the phase being coupled in series for summing the induced voltages formed thereon, wherein the summed voltage is a compensating voltage for the phase, and wherein the compensating voltage is angularly limited with respect to the phase, for each phase, the in-series secondary windings being further coupled in series with the primary winding corresponding to the phase, wherein the compensating voltage is added to the transmission voltage of the phase to result in a compensated voltage for the phase.