Wideband-oscillation Stability Constrained Power System Planning with High Penetration of Renewable Energy

With the increasing penetration of renewable energy, power systems face severe wideband-oscillation challenges. Noted that the wideband-oscillation is excited by the interaction between power electronic equipment and power grid, and inappropriate planning may aggravate this interaction. How to take wideband-oscillation stability into account during planning has become a key issue. To cope with the aforementioned challenge, this paper firstly establishes the state-space model within the full frequency range to describe the wideband-oscillation stability of converter-integrated power system. Based on this, stability constraints are formulated by eigenvalue sensitivities and the planning model is established. In addition, a further discussion is conducted to generalize the proposed method against the possible limitations. Simulation results show that the method can effectively foresee and alleviate the potential wideband-oscillation risk at the planning stage, and hence enhance the stability of the planned system.