Operation Duration Assessment of Isolated Island Considering DG Coordinated Control and Operation Risk Limitations

The operation duration of isolated island formed after fault is an important indicator of the operation ability. In this paper, a novel bi-level mixed-integer nonlinear model is proposed to evaluate the maximum operation duration of isolated island with fully consideration of the uncertainties of the wind turbines (WTs), the photovoltaics (PVs) and the load. Besides, risk limitation and the control strategies of distributed generators (DGs) and distributed energy resources (DERs) are also considered. The modified IEEE 33-bus power system with a certain penetration of WTs and PVs is employed to validate the proposed method. The simulation results indicate that the proposed model can evaluate the system's operation duration more realistic, and improve the credibility of the evaluation results.