Proliferation of nonlinear loads in power systems has increased harmonic pollution and deteriorated power quality. Not required to have prior knowledge of existing harmonics, Prony analysis detects frequencies, magnitudes, phases, and especially damping factors of exponential decaying or growing transient harmonics. In this paper, Prony analysis is implemented to supervise power system transien...

The Problems due to Harmonics and reactive power loses has been pertaining from the decades. Since many methods are proposed to reduce those above mentioned problems. one of the best method is employing Active Filters for the elimination of Harmonics and compensation of reactive power problems. This paper mainly explains about the new AF technology and different topologies utilizing in the pres...

Selective Harmonic Elimination Pulse Width Modulation (SHEWM) can eliminate selected low order harmonics by solving nonlinear transcendental equations to obtain the switching angles in advance and achieve precise control. However, when equations, convergence rate solution accuracy of existing intelligent algorithms for multilevel inverter SHEPWM will decrease with increase number angles. In thi...

Selective harmonic elimination (SHE) technique is used in power inverters to eliminate specific lower-order harmonics by determining optimum switching angles that are generate Pulse Width Modulation (PWM) signals for multilevel inverter (MLI) switches. Various optimization algorithms have been developed determine the angles. However, these techniques still trapped local optima. This study propo...

Process harmonics often need to be eliminated for accurate regenerative chatter diagnosis. To eliminate the with many band-stop characteristics, this paper uses a periodic/aperiodic separation filter (PASF) and proposes detection algorithm based on PASF. The PASF can design cutoff frequency time constant, directly, high-order improves elimination performance without deteriorating signal extract...

In this paper grid connected photovoltaic generation system to mitigate the lower order harmonics by using SHE PWM inverter is discussed. In Renewable sources, solar photovoltaic system is more flexible and pollution free. Then SHE PWM inverter is used to maintain the output voltage with reduced selective harmonics ( 5, 7, 11, 13 ). The system is proposed to reduce selective harmonics in the ou...