Internet of things based monitoring of total harmonic distortion in amulti level inverter

Abstract

These days, household appliances, industrial loads and commercial equipment are operating with non-linear electrical loads, which draw non-sinusoidal current from a sinusoidal supply voltage. This leads to a non sinusoidal current containing fundamental frequency component and integer multiples of fundamental frequency. Non-linear loads, connected in the power system, do not maintain unity power factor which causes high voltage drop in the power system. This harmonic current flowing into the power system is the major cause for the problems like nonzero current in neutral conductor, reduced terminal voltage, overheating of windings in the transformer, insulation failure in equipment, misfiring of switches in variable speed industrial drives and so on. The necessity for Multi-Level Inverter (MLI) arises to tackle the problems listed above. The main advantage of MLI is that it provides almost sinusoidal AC output voltage with less harmonic distortion. Whenever the level of MLI increases, it generates AC voltage purely sinusoidal in nature and contain less harmonics. Now a days, the application of inverter is on the increase for multivarious purposes. Inverters are used in Switched Mode Power Supplies (SMPS), Variable Speed Drives (VSD) etc. Inverters can be installed in applications like space, transmission lines etc; But monitoring inverter performance locally is difficult. The main objective of this research work is to arrive at the possibility of monitoring the output of MLI through Internet of Things (IoT) newline