Smart Inverter Stability Enhancement in Weak Grids Using Adaptive Virtual-Inductance
Aswad Adib, Fariba Fateh, Behrooz Mirafzal
Abstract
An adaptive virtual-inductance feedforward scheme is presented in this article to enhance the stable operation of smart inverters in weak grids. In the developed scheme, the virtual inductance is updated in real time according to an adaptation law to ensure that the inverter follows the dynamic response of a robust reference model, thereby ensuring stability without the need for any grid impedance estimation. In this article, the developed scheme is validated with experimental results obtained from testing a small-scale two-level, 208-V, 2-kW inverter.
Topics & Concepts
InductanceInverterControl theory (sociology)Feed forwardGridComputer scienceScheme (mathematics)Stability (learning theory)Electrical impedanceSmart gridElectronic engineeringEngineeringControl engineeringElectrical engineeringVoltageMathematicsArtificial intelligenceMathematical analysisMachine learningControl (management)GeometryMicrogrid Control and OptimizationIslanding Detection in Power SystemsAdvanced DC-DC Converters