Abstract
In this paper a single-phase transformer-less hybrid series active filter (THSeAF) based on duo-neutral-point-clamped (D-NPC) converter to address distribution level power quality is proposed to investigate experimentally the efficiency of the hardware-in-the-loop (HIL) implementation for power electronics applications. This benchmark contributes to demonstrating the capability and efficiency of such real-time implementation for smart grid power quality (PQ) analysis which requires fast switching process with small sampling time. Such applications require the compensator to address major power quality issues related to a nonlinear load. This compensator presents an efficient and reliable solution for future grid applications to overcome voltage and current related issues as well as assisting the integration of renewables for a sustainable supply. The controller extracts voltage and current harmonics to be compensated. A proportional and resonant (P + R) regulator produces switching signals for the D-NPC converter. The paper demonstrates the reliability of the HIL simulation for power electronic applications assessing power quality related issues where a wide range of switching frequency is under study. A combination of simulation and real-time results are carried out to validate the performance and viability of the HIL implementation.
Highlights
The HIL and Power-HIL (PHIL) are concepts quite established to study the behavior of systems with the fundamental 50 or 60 Hz
The smart grid associated with the continuous increase of power electronic converters, drives, as well as domestic and industrial nonlinear loads has created a serious concern on the power quality of the future distribution power systems
This illustrates the high impact that HIL testing could have on the development process of devices devoted to power quality issues
Summary
The HIL and Power-HIL (PHIL) are concepts quite established to study the behavior of systems with the fundamental 50 or 60 Hz. Regarding the limitation of the time-step imposed by the real-time (RT) simulators [1], it is challenging to study the behavior of high-frequency signals such as harmonics of a power system In those cases the harmonics are not taken into account and are mostly out of scope of the study. The smart grid associated with the continuous increase of power electronic converters, drives, as well as domestic and industrial nonlinear loads has created a serious concern on the power quality of the future distribution power systems. The reason why, such implementations are becoming crucial and game changer tools especially for PQ studies. In some existing North American EV charging stations, the cars are connected between two phases of the threephase four-wire (3P4W) system, creating heavy unbalances
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