THD improvement of a non-linear load in distribution network using D-STATCOM based on SRFT algorithm.

The power quality of distributed power generation systems is a growing, challenging, and fascinating field in modern times. Power quality refers to assessing and maintaining optimal power quality during generation, transmission, and distribution. The power quality gets degraded due to voltage sag/swell, flickers, voltage spikes, harmonic distortions, etc. These issues are usually caused by non-linear loads in welding machines, arc furnaces, and other heavy types of machinery. In the present study, the Distribution Static Compensator (D-STATCOM) helped in compensating the harmonics and the reactive power demanded by the non-linear loads. The reference current for D-STATCOM is derived using the Synchronous Reference Frame Theory (SRFT). The Total Harmonic Distortion (THD) percentage is calculated by designing the simulation block diagrams in the Matlab/Simulink. As a result, the source's power factor (PF) is improved, and the Total Harmonic Distortion in the source currents is analyzed as 4.76%, its considered satisfactory as per the IEEE-519 standard. [ABSTRACT FROM AUTHOR]