Study of torsional interactions in multi-terminal DC systems through small signal stability analysis

摘要: Turbo-generators can be subjected to negatively damped subsynchronous frequency oscillations caused by the interactions between generator and external network. This phenomena is termed as resonance (SSR) it well known that series compensated AC lines are major contributors. In recent years, has been established HVDC systems with converter controllers also cause unfavourable torsional interactions. Report development of mathematical model based on small signal stability analysis for study in systems. The formulation general enough include multi-terminal DC (MTDC) case two terminal three presented illustrate effect controller gains damping oscillations.