Steady-State Stability of Sending-End System with Mixed Synchronous Generator and Power-Electronic-Interfaced Renewable Energy

Figure 10

Changes of P_Σ, P_e, and P_r with θ (solid curves—the total transmission power reaching its own steady-state stability limit; dashed curves—the thermal generator reaching its own steady-state stability limit). (a) P_Σ(δ, P_r) in the original model. (b) P_Σ(δ, θ) in the triangular transformation model.