Study on Subsynchronous Resonance in Vietnam Power System

The SSR is a concerning issue in power systems that can lead to damaging consequences such as turbine-generator shaft damage and power system instability. The installation of series capacitors on transmission lines is a major factor contributing to SSR. Vietnam experienced an occurrence of SSR at the Vung Ang I thermal power plant on November 24th, 2015. As the country’s renewable energy sector, particularly wind turbine generators, continues to expand rapidly, the severity of SSR to Vietnam power system is expected to increase. Recognizing the significant harms caused by SSR to power systems, this article focuses on studying this phenomenon in the power grid of Vietnam under two typical scenarios: 2020 and 2025. The research makes use the EMTP-RV tool to determine the frequency range that triggers SSR and identifies power plants at high risk of being affected. In addition, a viable solution for reducing SSR in the power system is proposed and validated.