Harmonic resonance is one of an important aspect being considered in a large network such as a wind power plant (WPP). This paper analyses several factors that affect resonance characteristic in a WPP and possible mitigation measures. The first part of the paper provides an analysis of resonances in WPP. Two methods of identifying resonances are performed which are a common impedance scan metho...

Two dimensions Mathieu equation containing periodic terms as well as the delayed parameters has been investigated in the present work. The present system represents to a generalized form of the one-dimension delay Mathieu equation. The mathematical difficulty for delay the coupled Mathieu equation has been overcome by using the matrices method. Properties of inverse complex matrices enable us t...

We study experimentally second-harmonic generation from arrays of split-ring resonators at oblique incidence and find conditions of more than 30-fold enhancement of the emitted second harmonic with respect to normal incidence. We show that these conditions agree well with a nonlinear Rayleigh-Wood anomaly relation and the existence of a surface lattice resonance at the second harmonic. The exis...

To study the impact of fundamental flow and background harmonics on harmonic and resonance characteristics of high-speed train-network coupling systems, harmonic admittance matrix model for four quadrant converter is deduced with the method of FFT and Bessel function. Equivalent load of train and chain network model of multiple conductors was established to conduct the calculation of fundamenta...

1 Introduction Harmonic resonance, subharmonic and superharmonic entrainment, quasiperiodic and chaotic behavior are well known to occur in nonlinear self-oscillating systems which are subject to periodic forcing. Harmonic resonance occurs if the periodic forcing signal has a frequency very similar to the one of the undisturbed system and results in an amplification of the oscillations.

(1.5 cm higher than coil planes). The combination sensitivity is homogeneous along strip direction. Fig 4. In the 16-ch microstrip array, adjacent elements with 1 and 2 harmonic resonance are intrinsically decoupled with more than 22dB. Fig 1. Circuits of microstrip coils with 1 ,2 and 4 harmonic resonance (left), equivalent circuits based on mirror theory (middle), and current distribution alo...

The resonant interaction between surface acoustic waves and ferromagnetic thin films, a phenomenon known as acoustically driven resonance (ADFMR), provides way to control magnetic with purely voltage excitation. However, devices have historically been operated at harmonic frequencies, leading large insertion losses. In this work, we demonstrate harmonic-free drive of ADFMR where the strain reac...