System Identification and Adaptive Control for Boost Converter with Constant Power Loads
2023 IEEE Energy Conversion Congress and Exposition (ECCE)(2023)
Abstract
Hybrid AC + DC Microgrids are an excellent solution to integrate modern power generation and consumption with legacy infrastructure. Tightly regulated converters connecting AC and DC loads to a DC bus challenge the stability of the Microgrid by showing a Constant Power Load (CPL) behaviour. This work proposes an adaptive controller for converters regulating the DC bus voltage, and a novel nonlinear estimator to identify the CPL and resistive power consumption components. The controller employs a traditional dual-loop PI control structure in which the voltage loop proportional and integral gains vary according to the estimated operating condition, allowing to maintain constant dynamics at all operating conditions. The proposed methods show low computation complexity and are suitable for implementation on industry-standard microcontrollers. Detailed mathematical procedures, as well as simulation and experimental validation are included in this paper.
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