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New approach for stability enhancement of superconducting generator with high response excitation

Superconducting generators (SCGs) are recently expected to substitute conventional machines in modern power systems. They are known for their many advantages such as light weight, small size and high efficiency. Self-excited SCGs, with high response excitation effect, have supplementary property that may be used for enhancing transient power system stability. Hence, the control of this type of generators becomes increasingly important. Because of the long time constant of the SCG, the control of excitation only is not sufficient. In this paper, we study the enhancement of power system stability by implementing power system stabilizer (PSS) into excitation (EPSS) and/or turbine governor (GPSS) systems of the SCG with high response excitation. Non-linear simulation results of a single machine infinite-bus power system, under different operating conditions, show the effectiveness of using exciter-based stabilizer in conjunction with the governor stabilizer (EGPSS).