Results 51 to 60 of about 512,442 (296)
Constrained simulations of the Antennae Galaxies: Comparison with Herschel-PACS observations [PDF]
, 2013 We present a set of hydro-dynamical numerical simulations of the Antennae galaxies in order to understand the origin of the central overlap starburst.
Johansson, P. H. +5 more
core +1 more source
Observer-Based Power-Synchronization Control for Grid-Forming Converters
2023 IEEE Belgrade PowerTech, 2023 Peer ...
Mourouvin, Rayane +7 more
openaire +3 more sources
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley +1 more source
EnergiesThe control methods of energy systems can be categorized into grid-following and grid-forming types. The grid-following control method relies on grid synchronization and is prone to stability issues in weak grid conditions.
Yue Ma, Ning Chen, Luming Ge
doaj +1 more source
Power Electronics and Drives, 2023 Along with de-carbonisation, the penetration of power electronic converters has increased, and the power system has become a power electronic-based power system. In such a situation, the stability of the power system faces great challenges.
Gao Xian +3 more
doaj +1 more source
Large area projection liquid-crystal video display system with inherent grid pattern optically removed [PDF]
, 1992 A relatively small and low-cost system is provided for projecting a large and bright television image onto a screen. A miniature liquid crystal array is driven by video circuitry to produce a pattern of transparencies in the array corresponding to a ...
Liu, Hua-Kuang
core +1 more source
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur +5 more
wiley +1 more source
AC-Side Impedance-Based Stability Assessment in Grid-Forming Modular Multilevel Converters
IEEE AccessGrid-forming converters can emulate the behavior of a synchronous generator through frequency droop control. The stability of grid-forming modular multilevel converters can be studied via the impedance-based stability criterion. This paper presents an ac-
Mehrdad Nahalparvari +3 more
doaj +1 more source
Stability analysis of hybrid synchronization controller based grid forming control
Energy Reports, 2023 Synchronization units are vital for the stable operation of grid-tied converters in generation and transmission. There are two main synchronization units, i.e., phase-locked loop (PLL) and power synchronization controller (PSC), with the corresponding ...
Rongcai Pan +5 more
doaj +1 more source
Frequency Shaping Control for Weakly-Coupled Grid-Forming IBRs
IEEE Control Systems Letters, 2023 We consider the problem of controlling the frequency of low-inertia power systems via inverter-based resources (IBRs) that are weakly connected to the grid. We propose a novel grid-forming control strategy, the so-called frequency shaping control, that aims to shape the frequency response of synchronous generators (SGs) to load perturbations so as to ...
Bala Kameshwar Poolla +4 more
openaire +2 more sources