Damping of subsynchronous resonance using SSSC with hysteresis current control

Hybrid series compensation using static synchronous series compensator (SSSC) and passive series capacitor can improve the stability of the system, increases the power transfer capability. This paper analyzes the subsynchronous resonance (SSR) characteristics of the hybrid series compensated power system in detail and proposes a simple method to damp the oscillations. In this work, SSSC is modeled by a combination of three-level, 24 pulse configuration. Using the IEEE First Benchmark Model, the effectiveness of the proposed for mitigating SSR due to torsional interaction will be shown. The machine and circuit parameters are real values taken from the Navajo Project.