Instantaneous Power and Phase Shifts at Piezoceramic Bars Forced Vibrations

A New Control Method for Single-Phase Grid-Connected Inverter Using Instantaneous Power Theory

Because of installation for local consumers and since it is free of all contaminations, connecting photovoltaic cells to the grid via single-phase inverter is significantly on the rise. In this paper, a new simple current control is proposed for a single-phase grid-connected voltage source inverter. Using the PQ theory and modelling a single-phase system as an unbalanced three-phase system, a m...

Forced Vibrations of a Nonhomogeneous String

We prove existence of vibrations of a nonhomogeneous string under a nonlinear time periodic forcing term in the case in which the forcing frequency avoids resonances with the vibration modes of the string (nonresonant case). The proof relies on a Lyapunov–Schmidt reduction and a Nash–Moser iteration scheme.

Forced Vibrations for a Nonlinear Wave Equation

Discussions and Closures Discussion of “ Instantaneous Reactive Power - Theory and Power Properties of Three - Phase Systems ”

The author of the paper [1] should be commended for his continuous contributions pointing out the deficiencies of many of the available power theories. We fully agree with the author that the instantaneous p-q theory has important deficiencies when it comes to the physical interpretations of the power components. In [2], the author properly states that the main objectives of a power theory incl...

Instantaneous Active and Reactive Power Measuring Method in Three Phase Power System

This paper describes an electronic means of measuring the instantaneous active and reactive power absorbed by any electrical equipment. The measurements are based on the Clark (α-β) and Park (d-q) transformations. The system is useful to teach electrical machines in Park’s coordinates and it allows also the study and control of some power electronics converters that are connected to three phase...