Non-Linear Compensation of Delays in the Wide Area Control of SVCs for First Swing Stabilisation and Damping

Abstract

A non-linear delay compensation algorithm is presented for improving the robustness to delays of a wide area control strategy directed at using remote measurements to perform load modulation by means of an SVC. The compensation algorithm uses non-linear backward and forward projection of PMU based angle and velocity measurements to compensate for delays. Through the simulation of a simple network it is shown that the robustness to delays is greater than 7 seconds much greater than any expected delay. The non-linear delay compensation algorithm also provides better first swing stability than linear delay compensation.