Arbitrary waveform power source for testing purposes in real-time using an H-cascaded multilevel converters and FPGA-based control

Abstract

This paper presents the design and construction of a scaled-down arbitrary waveform power source which bases the synthesis of power signals at its output in two H converters multilevel with asymmetric sources in cascade. The aim of the power source is to mimic the disturbance-like signal for testing controls, instruments and electric devices and equipment in real-time. The electrical disturbances of interest are those related to power quality degradation and shortcircuit events in power grids. A FPGA platform is the core element of the computational bed for the PWM multilevel scheme, and other control task, useful for implementing the waveforms as required for a particular application. As final part a number of experimental results are presented.

Step-up Transformerless Seven-level DC-AC Hybrid Topology for Interconnection of Renewable-based DC Sources to Microgrids

“…A relevant low-voltage application of multi-level converters is a signal amplifier (including audio range) for testing purposes [8,9]. The topology used includes two H-bridges connected in cascade to build a nine-level DC-AC converter using only eight power switches.…”