Most of the pollution issues created in power systems are due to the non-linear characteristics and fast switching of power electronic equipment. Power quality issues are becoming stronger because sensitive equipment will be more sensitive for market competition reasons, equipment will continue polluting the system more and more due to cost increase caused by the built-in compensation and somet...

The paper deals with a new methodology for calculating the filter parameters. basis is respect fact that real current consists of other harmonic components, which tuned. proposed was used to design filters traction substation 25 kV/50 Hz. operation locomotives in AC supply systems Hz leads rising higher order currents. Due 1-phase system, these are mainly 3rd and 5th harmonics. By simulation su...

The increasing use of power electronic based loads (adjustable speed drives, switch modern power supplies, etc) to improve system efficiency and controllability is increasing concern for harmonic distortion levels in end use facilities and on overall power system. The Active Power Filter uses power electronic switching to generate harmonic currents that cancel harmonic content from non – linear...

The quality of power that is degrading day by an important issue for all the consumers. factor this harmonics in voltage and current waveforms which can be resolved use hybrid series active filter. combination consists a filter shunt passive connected parallel to load. method used paper purpose achieving good harmonic compensation reduced total distortion various types nonlinear loads as per st...

The advantages of rapid spectral scanning have been combined with -the inherent accuracy of a compensating ellipsometer operated in the polarizer-compensator-sample-analyzer configuration. Wavelength is varied over the visible-UV ( 3 7 0 7 2 0 nm) at a maximum rate of 114 nm/s by rotating a continuously-variable interference filter. A three-reflection Fresnel rhomb serves as the achromatic quar...