A μ-synthesis robust SVC control design

Based on a bifurcation subsystem method a μ-synthesis SVC (MSVC) control is designed to increase the damping of interarea oscillation as well as maintaining the bus voltages. The structured uncertainty modeling, the MSVC control configuration, the performance index, and the weighting transfer function are formulated according the nature of the interarea oscillation caused by active power load change. The MSVC designed in this paper and the robust power system stabilizer (MPSS) in the previous paper are compared and discussed. Bifurcation subsystem method plays an important part in this paper because it provides (1) a bifurcation parameter for uncertainty modeling; and (2) a criterion to reduce the order of the resulting MSVC control.