AUTOMATIC REDUCTION OF THD FOR NON LINEAR LOAD BY USING PWM INVERTER WITH MICROCONTROLLER

The phrase harmonics related to Power quality refers to the purity of the voltage and the sinusoidal current waveform. Power quality is crucial when designing commercial and industrial power systems. Voltage and current differences caused by harmonic distortions are frequently seen in electrical distribution networks due to frequency shifts. Particularly, there are differences from the usual sinusoidal voltage or current changes. Nonlinear loads, such as those connected to variable frequency drives (VFDs) installed for fans and pumps supplying building air conditioning systems, are the main source of harmonics. These converters specifically introduce nonlinear loads throughout the electrical distribution systems and draw a non sinusoidal current/voltage. Due to the widespread use of computers and other power devices in buildings nowadays, harmonic distortion issues are a regular occurrence. In instance, harmonic distortions can result in a number of issues and harms, such as wire overheating and power outages. This design describes the impacts of harmonics on the power system and how it can reduce those effects.