A Study on The Impact of Wind Farm Spatial Distribution on Power System Sub-Synchronous Oscillations

Motivated by several recent incidents, this paper investigates the impact of wind farm spatial distribution and shunt compensation levels on triggering system-side sub-synchronous oscillations (SSO) in wind-integrated power systems. Quantitative analysis on system eigenvalue sensitivities with respect to wind farm and transmission line parameters as well as system operating conditions is performed systematically to understand the multi-wind-farm-induced SSO. Coupling relationship for wind turbines with identical and different parameter settings on the studied SSO modes is investigated. Electro-magnetic simulations are performed on a multi-machine wind farm model derived from a practical wind-integrated power system, in order to verify the proposed study.