Medium voltage multilevel AC regenerative load with One-Cycle Control

Variable linear or nonlinear loads are necessary for testing medium voltage (MV) high power AC power supplies. Generally, those AC power supplies require performance validation, burn-in, and/or life-time testing under different load conditions, defined by the end-user or standards for the given applications. For this purpose, this paper presents a multilevel converter-based AC regenerative electronic load with One-Cycle Control (OCC), which is based on a five-level diode-clamped multilevel converter and can emulate any impedance load, whether linear or nonlinear, steady or dynamic. Simulation and experimental results are presented to verify the performance of the proposed multilevel AC regenerative load.