Large-Signal Stabilization of Power Converters Cascaded Input Filter Using Adaptive Energy Shaping Control

Series connection of input filters with static converters might lead to instability. However, the filter has rarely taken into account in stable design power converters. Indeed, an LC cascaded a converter can become unstable even if is regulated by tight controller ensuring its stability alone. This fact due interactions between and converter. To tackle instability potential, adaptive energy shaping control (AESC), which based on interconnection damping assignment passivity-based (IDA-PBC), addressed this article regulate system achieve following attractive features: 1) filter's dynamics are considered law, so during 2) influence several subsystems, put cascade, proposed method, new large-signal proof given accordingly. Simulation experimental results from 3.5-kW, 270-200-V buck under different load conditions, i.e., constant impedance (CIL), current (CCL), (CPL), presented demonstrate approach.