Resilient DSTATCOM Control for Power Quality Improvement

Abstract

newline The development of solid-state power electronics technology and adverse use of nonlinear newlineloads leading to severe issues like harmonic distortions, unbalanced currents and voltages, newlineexcessive neutral currents, generation of impulses, voltage sag and swell, flickers etc. The newlinesystem s power factor and efficiency suffer as a result of all these significant disruptions. The newlinepower electronic devices use reactive power and harmonic current from the power system newlinenetwork, and they respond quickly when it comes to adjusting their voltages and currents. newlineHarmonics tends to decrease the overall efficiency of the system, increases various losses. newlineMost of the time they also create interference with the parallel running communication lines. newlineSinusoidal waveforms with frequencies that are integral multiples of the power line frequency newlineare referred to as harmonics. The term quotharmonicquot is frequently used in power system newlineengineering to refer to waveform distortion, either for voltage or current. Various filters have newlinebeen used to suppress such issues. Shunt passive filters has lots of challenges; to lessen the newlineharmonic current flowing into the source, it exhibits a lower impedance at the tuned harmonic newlinefrequency than the source impedance. There are many challenges with passive filters such newlineas Unsuitable for altering system circumstances, variable reactive power compensation and newlineimpacts of aging, degradation, and temperature may intensify design tolerance andbring newlineabout detuning, more safeguards and surveillance tools are needed, to solve all these problem newlineshunt active filters are used. Now a day s FACTS devices are very common in use. In present newlinedays, because nonlinear devices are used in industrial, commercial, residential, and traction newlineapplications so frequently, AC distribution systems are dealing with a lot more power quality newlineissues. In distribution systems, issues with voltage and current quality are categorized as newlinepower quality issues. In addition to creating PQ issues, nonlinear loads are also extremely newlinesusceptibl