SPEAKER: Temitope Amuda, Department of Electrical and Computer Engineering, UIUC
TITLE: "Power Flow Modelling for Inverter-Based Power System"
WHEN: Monday, September 19, 2022
WHERE: 4070 ECEB, 3:00 – 3:50 p.m.; ZOOM Meeting ID: 881 4997 1008; Password: seminar
ABSTRACT: The conventional power flow model is formulated for grids with synchronous generators and uses a single slack bus to ensure the grid supply-demand balance. The gradual replacement of fossil fuel resources by renewable energy resources that require an inverter-based interface with the network has been accompanied by the development of appropriate control schemes for the various inverter types used. The continuing integration of inverter-based resources into the power grid necessitates the modification of the power flow formulation to incorporate the models for such inverters and control schemes. This presentation discusses the formulation of the augmented power flow that includes the models for droop-based grid-forming (GFM) inverters and dispatchable virtual-oscillator-controlled GFM inverters. We also discuss the proposed quasi-Newton solution scheme for the augmented power flow problem. A salient feature of this quasi-Newton method is that the voltage magnitudes at the inverter connected buses are decoupled from the frequency mismatch of the network from the rest of the model. The resulting reduced system is similar to the conventional power flow model and may be solved with current power flow solvers once the few, required modifications are made.
