Study and Mitigation of Subsynchronous Oscillations with SSC Based SSSC

Anjali S.  Junghare; Bhimrao S.  Umre; Koteswara Raju  Dhenuvakonda; Vijay S.  Kale; Mohan P.  Thakre

doi:10.4236/jpee.2015.39003

Mohan P. Thakre^*, Vijay S. Kale, Koteswara Raju Dhenuvakonda^*, Bhimrao S. Umre, Anjali S. Junghare

Abstract: This paper proposes a powerful subsynchronous component based (SSC) controller to mitigate the subsynchronous resonance (SSR) with statics synchronous series compensator (SSSC). The mitigation of SSR is achieved by increasing the network damping at those frequencies which are close to the torsional frequency of the turbine-generator shaft. The increase of network damping is done by the extraction of subsynchronous component of voltage and current from the measured signal of the system. From the knowledge of subsynchronous components, a series voltage is injected by SSSC into the transmission line to make the subsynchronous current to zero which is the main cause of turbine oscillations. To analyze the effectiveness of the proposed control scheme, IEEE first benchmark model has taken. The results show the accuracy of the proposed control scheme to mitigate the Torque amplification of SSR.

Keywords: Current Control, SSC, SSSC, SSR, Torsional Oscillation, Voltage Source Converter

Cite this paper: Thakre, M. , Kale, V. , Dhenuvakonda, K. , Umre, B. and Junghare, A. (2015) Study and Mitigation of Subsynchronous Oscillations with SSC Based SSSC. Journal of Power and Energy Engineering, 3, 33-43. doi: 10.4236/jpee.2015.39003.

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