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This paper demonstrates the capability of a superconducting magnetic energy storage (SMES) unit in improving transient as well as dynamic stability of power systems and to increase system damping. It can also be used to suppress any subsynchronous resonances. In this context, investigations have been conducted to a system consisting of a finite station represented by a synchronous machine connected to an infinite bus-system via a short transmission line. Through this investigation, a new technique based on unequal α-mode (firing angle) that eliminates the necessity of using any extra controllers is used. Results have shown that SMES unit can effectively increase system stability and suppress any oscillations that might be caused due to any system fault.