This paper addresses a modeling and analysis methodology for investigating the stochastic harmonics and resonance concerns of wind power plants (WPPs). Wideband harmonics from modern wind turbines (WTs) are observed to be stochastic, associated with real power production, and they may adversely interact with the grid impedance and cause unexpected harmonic resonance, if not comprehensively addr...

Harmonic adaptability (HA) capability is required for large-scale onshore and offshore wind turbines (WTs) connected to the grid. To ensure that the distortion of the harmonic voltage at the grid access point generated by grid simulator is in accordance with the required value, this paper proposes an on-site HA remote testing method for offshore WTs to eliminate submarine cable effects. The dev...

Today, the presence of disturbing loads in low, medium and also directly in high voltage networks is producing a growing presence of harmonics and unbalance in transmission levels. Economic reasons difficult the installation of harmonic measurement devices in all the buses of the system. Instead, it would be possible to install harmonic measurement equipment in selected buses, in a fraction of ...

Electrical Impedance Tomography (EIT) is mainly used to display information about the respiration of a patient. However, also cardiac-related signals are present, and, although they have small amplitude, can be distinguished by their frequencies. In this contribution, we report method based on harmonic analysis separate and perfusion. These described summation amplitude-modulated at different W...

BACKGROUND Current evaluation of pulmonary hypertension (PH) in children involves measurement of pulmonary vascular resistance (PVR); however, PVR neglects important pulsatile components. Pulmonary artery (PA) input impedance and ventricular power (VP) include mean and pulsatile effects and have shown promise as alternative measures of vascular function. Here we report the utility of pulsed-wav...

We studied the effects of changes in aortic input impedance on the force-velocity-length relationship of the left ventricle in sir open-chest dogs, using a right heart bypass preparation. The control relationship between wall stress and ventricular diameter or mean velocity of shortening (MVCF) was determined first by using maneuvers (changes in venous return and phenylephrine infusion) that di...

This study addresses the output impedance model of LCL-type grid-connected converter considering dead-time effects and digital control delay. The shows that delay will affect accuracy converter, are only equivalent to superimposing a disturbance voltage on original model. derived is verified by comparing it with switching in PSIM simulation environment. harmonic interaction between cluster util...

This paper presents a generalized impedance-based modeling framework for harmonic stability assessment due to converter interactions in hybrid AC/DC power systems, relying on detailed analytical frequency-dependent component models. The methodology proposed and derived this enables the analysis of complete systems by explicitly accounting effect both AC DC leaving out commonly applied simplifyi...