Unbalanced Phase-to-Phase Voltage Compensators Applied to Radial Distribution Feeders

This paper describes an application of a thyristor-controlled reactive power compensator (TCRC), which aims at individually controlling phase-to-phase voltage imbalancing in radial distribution feeders. The compensator model is straightforward included into the classical three-phase load flow formulation. The Newton-Raphson iterative solution is obtained through an algorithm based on the orthogonal Givens rotation. The solution method allows to overcome the usual ill-conditioned Jacobian matrix problem arised from radial networks with high R/X ratios. Large amount of simulations are carried out in order to evaluate the TCRC model robustness.