A new static variable system (SVS) control technique will be explored in this study to improve the transient performance of a energy generating system that uses series capacitors for compensation. The recommended approach operates over a variety of series compensation values. It consists of a mid-point sited SVS outfitted with an allied voltage and current supportive (AVCS) signal. The strategy is applied and tested with the IEEE first benchmark model (IFBM). The IFBM is integrated with the transmission line which is represented considering the charging shunt capacitance in its equivalent π-circuit that plays a vital role in predicting the system dynamics with enhanced accuracy. The SVS situated at the mid-point of the Power line utilizes line voltage and current deviations in allied form which is derived from its location only. Eigenvalue evaluation was carried out to examine unstable transient torsional modes by means of the Linearly approximated Power network. With the suggested AVCS signal assisted SVS, the uncertain transient torsional modes are successfully stabilized at varying degrees of series compensation of the line. To evaluate the effectiveness of the proposed method in transient scenarios, a time domain simulation study is achieved both with and without the AVCS signal integrated into the SVS control system. A non-linear system model taking into account all system non-linearities is created. It is evident that the torsional instabilities are gloriously removed, the transient behaviour is greatly enhanced, and the suggested strategy’s robustness is validated at 20%, 40%, and 60% of the Power line's series compensation.