Power Quality Improvement and Filtering Techniques in Power Supplies

Abstract

Nowadays, the rapid growth of power electronics in industry and the presence of newlineproducts based on electronic components in enterprises, institutions, shops, small newlinebusinesses, residences and transport systems have been welcomed by the people who newlinealready use it due to its increased productivity within all areas. The problem of the newlineincreasing use of power electronics equipment is the important distortions originated; the newlineperfect AC power systems are a pure sinusoidal wave, both voltage and current, but the newlineever-increasing existence of non-linear loads changes the characteristics of voltage and newlinecurrent from the ideal sinusoidal wave. This deviation from the ideal wave is reflected by newlinethe harmonics and although its effects vary depending on the type of load, it affects the newlineefficiency of an electrical system and can cause considerable damage to the systems and newlineinfrastructures. Logic and electronic control circuits may get affected if the supply newlinevoltage has distortions, leading to damage in the consumer equipment and noise in the newlinedifferent installations or unsafe working conditions with electromagnetic interferences. newlineEnsuring optimal power quality after a good design and devices means newlineproductivity, efficiency, competitiveness and profitability. Nevertheless, nobody can newlineassure the optimal power quality when there is a good design if the correct testing and newlineworking process from the obtained data is not properly assured at every instant; this newlineentails processing the real data correctly. To ensure a precise measurement of the newlineelectrical power quantities, different processing techniques are necessary. The newlinepossibilities range from the design of the overall system to the testing and training of newlinedevices, checking the influence of the final design and behavior laws in a virtual newlineenvironment similar to the real one. One properly designed simulator would allow for newlinechecking the technical specifications in order to find contradictions that may be newlineintroduced during the design of the system and their subsequent correction. newline