Modeling of Three-Level Boost Converter

With the increasing demand for renewable energy systems and electric vehicles, there is a growing need for DC-DC converters for efficient integration and utilization of renewable energy sources and electric vehicles. While conventional boost converters are widely used due to simplicity and suitability for low-power applications, the advantages of the three level boost (TLB) converter, such as lower voltage stress, reduced size and volume of inductor, lower EMI, higher voltage conversion ratio and higher efficiency at higher power levels, make it particularly well-suited for these applications. Modeling of the TLB is essential to predict its transient and steady-state behavior, to devise appropriate design guidelines, and in selecting suitable control methods based on specific requirements of the application. However, existing literature lacks a precise model for the TLB. This paper presents a comprehensive analysis of the TLB converter and derives its mathematical model, average steady-state values, and small signal model using the state space averaging technique. The derived models are validated using MATLAB SIMULINK environment.