Results 31 to 40 of about 128,171 (294)
Tomographic imaging and scanning thermal microscopy: thermal impedance tomography [PDF]
, 2002 The application of tomographic imaging techniques developed for medical applications to the data provided by the scanning thermal microscope will give access to true three-dimensional information on the thermal properties of materials on a mm length ...
A. Hammiche +13 more
core +1 more source
Transactions on Environment and Electrical Engineering, 2016 Explored in this paper is the grid impedance effect on the stability of a single-phase grid connected inverter with an LC filter based on an analysis of the inverter output impedance.
Jiao Jiao, R. Mark Nelms
doaj +1 more source
Design and control of parallel three phase voltage source Inverters in low voltage AC microgrid [PDF]
, 2017 Design and hierarchical control of three phase parallel Voltage Source Inverters are developed in this paper. The control scheme is based on synchronous reference frame and consists of primary and secondary control levels. The primary control consists of
Krami, Nissrine +4 more
core +3 more sources
Properties of periodic arrays of symmetric complementary structuresand their application to grid amplifiers [PDF]
, 1998 Deschamps' theorem for n-terminal complementary structures is reviewed. An extension to Deschamps' theorem for a class of three-terminal bounded structures with one axis of symmetry is presented.
Moussessian, Alina +2 more
core +1 more source
Frontiers in Energy Research, 2023 The three-phase voltage-source grid-connected inverters suffer from grid-connected current quality problems due to system resonance caused by the under-damping characteristics of the filter and grid impedance, on the one hand, and the grid-connected ...
Zhi Zhang +4 more
doaj +1 more source
The PS 10 MHz High Level RF System Upgrade [PDF]
, 2016 In view of the upgrade of the injectors for the High Luminosity LHC, significantly higher bunch intensity is required for LHC-type beams. In this context an upgrade of the main accelerating RF system of the Proton Synchrotron (PS) is necessary, aiming at
C., Rossi +6 more
core +1 more source
Online Parametric Estimation of Grid Impedance Under Unbalanced Grid Conditions [PDF]
Energies, 2019 Whereas power-electronics-based power systems are expected to enable more integration of renewable energy sources, they could pose crucial challenges including stability issues due to the Thévenin impedance seen by inverters. Such problems could be mitigated by enabling the inverters to estimate the grid impedance by including a grid impedance ...
Nabil Mohammed +2 more
openaire +1 more source
, 2008 This paper introduces simple analytical formulas for the grid impedance of electrically dense arrays of square patches and for the surface impedance of high-impedance surfaces based on the dense arrays of metal strips or square patches over ground planes.
Goussetis, George +6 more
core +1 more source
IEEE Access, 2020 For inverters, a phase-locked loop (PLL) is usually needed for the grid synchronization. Typically, for the single-phase inverters, the orthogonal-signal-generators based PLLs (e.g., delay-based PLL) can be used.
Jinming Xu +4 more
doaj +1 more source
Frontiers in Energy Research, 2022 Under weak grid conditions, the variation of the grid impedance will affect the steady-state and dynamic performance of the LCL-filtered grid-connected inverter and even make the inverter unstable.
Fuyun Wu +4 more
doaj +1 more source