Results 51 to 60 of about 10,839 (297)

Impact of DC-Link Voltage Control on Transient Stability of PLL-Synchronized Voltage-Source Converters

, 2022
This article analyzes the impact of dc-link voltage control on the transient stability of voltage-source converters (VSCs) with the phase-locked loop (PLL) based synchronization. By integrating the dynamic of the dc-link voltage control into that of PLL,
Liu, Teng, Wang, Xiongfei; id_orcid, Liu, Fangcheng   +2 more
core   +1 more source

Soft Mechanical‐Electrical Logic Using Liquid Metal‐Filled 3D‐Printed Architectures

Advanced Engineering Materials, EarlyView.
We present 3D‐printed soft mechanical–electrical logic elements that use liquid metal–filled silicone tubes actuated by thermoplastic polyurethane/polylactic acid (TPU/PLA) architectures to produce Boolean operations. Complementary normally open and normally closed unit cells perform repeatable binary transitions and can be combined into more complex ...
Christoph Lehmann, Ryan Kalgreen, Laura M. Comella   +2 more
wiley   +1 more source

Microenvironmental Reprogramming by 3D Anisotropic Cardiac Extracellular Matrix Induces Nuclear Remodeling and Epigenetic Maturation of Chemically Induced Cardiomyocytes

Advanced Functional Materials, EarlyView.
A 3D anisotropic hydrogel derived from heart extracellular matrix guides cytoskeletal alignment and nuclear remodeling in reprogrammed cardiomyocyte‐like cells. This study reveals how matrix alignment modulates nuclear envelope dynamics and chromatin state, triggering transcriptional and functional maturation.
Seung Ju Seo, Mi Jeong Lee, Hyun Wook Kang, Seonhee Byeon, Soo‐Kyoung Choi, Nakwon Choi, Seung‐Woo Cho, Yoonhee Jin   +7 more
wiley   +1 more source

An Overview of Assessment Methods for Synchronization Stability of Grid-Connected Converters under Severe Symmetrical Grid Faults [PDF]

, 2019
Grid-connected converters exposed to weak grid conditions and severe fault events are at risk of losing synchronism with the external grid and neighboring converters.
Taul, Mads Graungaard; id_orcid, Wang, Xiongfei; id_orcid, Blaabjerg, Frede; id_orcid, Davari, Pooya   +3 more
core   +1 more source

Synchronization Stability Analysis of PLL-Based Grid-Connected VSC System by Voltage Space Vectors

CSEE Journal of Power and Energy Systems
This paper focuses on synchronization stability analysis of the power system, in which power electronics are synchronized by the phase-locked loop (PLL).
Huadong Sun, Shuyan Wang, Shiyun Xu, Jingtian Bi, Yiming Wang   +4 more
doaj   +1 more source

Memristor‐Driven Active‐Matrix Organic Light‐Emitting Diode for Energy Efficient and High‐Resolution Displays

Advanced Functional Materials, EarlyView.
This study demonstrates that memristors can replace conventional 2T–1C driving circuits with simplified 1T–1 m architectures by exploiting resistance switching. With ultra‐low switching voltages (< ±0.2 V) and multi‐level resistance states, the memristors precisely control the current injected into organic light‐emitting diodes (OLEDs).
Dong Hyun Kim, Nahyun Kim, Seok Hee Hong, Ho Jin Lee, Jin Suk Oh, Jae Seong Park, Tae Geun Kim   +6 more
wiley   +1 more source

Solution‐Processed Two‐Dimensional Indium Oxide on Sodium‐Embedded Alumina for Reconfigurable Optoelectronic Synaptic Transistors

Advanced Functional Materials, EarlyView.
Wafer‐scale two‐dimensioanl In2Se3 oxidized into InOx on sodium‐embedded beta‐alumina enables multifunctional reconfigurable electronics. Sodium ions accumulate within distinct spatial distribution under drain‐controlle and gate‐controlled operation. Drain‐control operation gives controllability of ultraviolet‐driven optoelectronic synaptic conductance
Jinhong Min, Yonghyun Albert Kwon, Hyunbin Kim, Jihyun Kim, Myeongjin Jung, Jaewon Heo, Gwang Ya Kim, Vlastimil Mazanek, Zdeněk Sofer, In Soo Kim, Jeong Ho Cho, Hyesung Park, Sang Min Won, Joohoon Kang   +13 more
wiley   +1 more source

Impedance Estimation for Transient Stability Enhancement of Virtual Synchronous Machines

2024 IEEE 15th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
In this paper, a passive technique for estimating the impedance and voltage of a Thévenin grid is presented. The method can be applied when either the maximum active power or minimum reactive power operating point, with respect to the power angle, is crossed. This work addresses transient events, for which the former occurs.
Pepper, Benjamin, Campos-Gaona, David
openaire   +3 more sources

Transient Stability Analysis of a Synchronous Motor by Lyapunov Method.

IEEJ Transactions on Industry Applications, 1991
Since a synchronous motor is held heavy nonlinearity, the transient stability analysis of it is generally laborious. Conventionally, this analysis has been used numerical solution or equal-area method, whereas this paper is proposed a new transient stability criterion by applying Lyapunov method which is powerful for nonlinear systems to estimate these
Senjyu, Tomonobu, Uezato, Katsumi
openaire   +2 more sources

Synchronization Dynamics in Non-Normal Networks: The Trade-Off for Optimality

Entropy, 2020
Synchronization is an important behavior that characterizes many natural and human made systems that are composed by several interacting units. It can be found in a broad spectrum of applications, ranging from neuroscience to power-grids, to mention a ...
Riccardo Muolo, Timoteo Carletti, James P. Gleeson, Malbor Asllani   +3 more
doaj   +1 more source