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Multilevel inverters such as the flying capacitor multilevel inverter (FCML) hold large potential benefit in applications where the size and weight of the inverter is constrained. This work presents the design and implementation of an inverter module which incorporates two individual 9-level FCML single-phase inverters in an interleaved design. Each inverter utilizes GaN FETs switching at 100 kHz,...
Multilevel topologies are an appealing method to achieve higher power density inverters for both mobile and stationary systems. This work discusses the design and development of a 13-level, flying capacitor multilevel (FCML) inverter. Operating from an 800 V bus, this inverter requires switches with a voltage blocking capability of less than 80 V. A 120 kHz switching frequency is enabled through the...
Differential power processing (DPP) is a power electronics system architecture that configures dc–dc converters in parallel with the PV string to improve its power yield. The parallel nature of the DPP architecture brings a number of benefits, such as low converter power rating and low power losses, all of which make DPP especially suitable for submodule-level maximum power point tracking (MPPT)....
Single-phase inverters and rectifiers require the use of an energy buffer to absorb the twice-line-frequency power ripple present on the AC side. Historically this challenge has been addressed by the use of large electrolytic capacitors. However reliability constraints and the need for improved system performance have motivated designers to seek other capacitor technologies such as ceramic and metal...
This work demonstrates the use of windowed current and voltage measurements for high accuracy PV maximum power point tracking using dithering digital ripple correlation control (DDRCC) at voltage and current levels typical of PV panels. Prior work has demonstrated that DDRCC can be used to obtain high tracking accuracy at fast speeds in low-power applications, however the measurement resolution required...
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