Results 101 to 110 of about 8,376 (257)

A multi-energy inertia-based coordinated voltage and frequency regulation in isolated hybrid power system using PI-TISMC

Frontiers in Energy Research
This paper proposes novel multi-energy inertia support for simultaneous frequency and voltage control of an isolated hybrid power system (IHPS). Multi-energy storage (gas inertia – hydrogen storage, thermal inertia – solar thermal storage, hydro inertia –
Kothalanka K. Pavan Kumar, Dulal Chandra Das, Nirmala Soren, A. S. Veerendra, Aymen Flah, Aymen Flah, Aymen Flah, Aymen Flah, Abdulaziz Alkuhayli, Rahmat Ullah   +9 more
doaj   +1 more source

Numerical Insights Into the Resistance Reduction Mechanisms of Forward Tapered Transoms in High‐Speed Catamaran: A Computational Fluid Dynamics‐Based Study

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study investigates the hydrodynamic influence of forward transom tapering on a displacement catamaran hull using computational fluid dynamics (CFD) simulations. Five taper configurations ranging from a vertical transom base design to a fully tapered stern (1.00B) were evaluated over a wide Froude number range (Fr = .3 to 1.0).
Chalermkiat Nuchturee, Chairat Napasaksri, Ramil Kesvarakul, Sarawuth Srinakaew   +3 more
wiley   +1 more source

Finite‐Time Disturbance Observer‐Based Nonlinear Robust Adaptive Control of Hydraulic Manipulator With Parameter Identification

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Hydraulic manipulators exhibit strong coupling, pronounced nonlinearities, and significant modeling uncertainties, which hinder high‐precision motion control. This paper proposes a finite‐time disturbance observer–based nonlinear robust adaptive control (RAC‐FTDO) framework enhanced by a physically consistent dynamic parameter identification ...
Tianyu Gao, Xianglong Liang, Wenxiang Deng, Jianyong Yao   +3 more
wiley   +1 more source

Improved piecewise coordinated frequency control of wind power generation system considering voltage restoration

电力工程技术
The large-scale integration of wind farms and power electronic devices reduces the total inertia and frequency regulation capability of power grid. The new energy systems，including wind power generation system，are required to provide sufficient inertia ...
Yuehai CHEN, Qiao PENG, Tianqi LIU, Tingyun GU, Houyi ZHANG, Yue XIN   +5 more
doaj   +1 more source

Analytical Inertia Identification of Doubly Fed Wind Farm with Limited Control Information Based on Symbolic Regression

Applied Sciences
The integration of large-scale wind power clusters significantly reduces the inertia level of the power system, increasing the risk of frequency instability. Accurately assessing the equivalent virtual inertia of wind farms is critical for grid stability.
Mengxuan Shi, Yang Li, Xingyu Shi, Dejun Shao, Mujie Zhang, Duange Guo, Yijia Cao   +6 more
doaj   +1 more source

A hybrid adaptive virtual inertia controller for virtual synchronous generators

International Transactions on Electrical Energy Systems, 2021
Mostafa Malekpour, Arash Kiyoumarsi, Mehdi Gholipour   +2 more
openaire   +1 more source

An Improved Air Film Model for Studying the Tilt Characteristics of Aerostatic Thrust Bearings

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this study, an improved mass‐spring model that treats the lubricating air film as distributed springs is proposed to calculate the static and dynamic angular stiffness of aerostatic thrust bearings. The proposed model refines the traditional mass‐spring model by introducing the spatially varying mechanical properties of the air film and the
Hui Zhuang, Jianguo Ding, Yu Chang
wiley   +1 more source

Improving Affordability and Accessibility for Socially‐Beneficial Services via Government Incentives

Naval Research Logistics (NRL), EarlyView.
ABSTRACT Many socially‐beneficial services, like dental care, suffer from a dual challenge: Low affordability for citizens and long waiting times due to insufficient provider capacity. We model a government's problem of designing subsidy policies to address this issue.
Xiaoyan Zhao, Venus Lo, Stephen Shum
wiley   +1 more source

Exercise, exerkines, and muscle–brain crosstalk in Parkinson's disease

Neuroprotection, EarlyView.
Abstract Parkinson's disease (PD) is a progressive neurodegenerative disorder with motor and non‐motor symptoms, driven by dopaminergic loss and α‐synuclein accumulation. Beyond neurodegeneration, growing evidence highlights skeletal muscle health as a key determinant of prognosis, with sarcopenia and frailty contributing to greater disability, fall ...
Salomón Páez‐García, Edgar Alvarado, Alejandro Cuevas, Laura Valverde, Eduardo Salinas, Kevin O'Hara‐Veintimilla, María Cruz Rodríguez‐Oroz, Miguel Germán Borda   +7 more
wiley   +1 more source

Localization Through Coordination? Implementing the Humanitarian‐Development‐Peace Nexus in the Democratic Republic of the Congo

Public Administration and Development, EarlyView.
ABSTRACT As a global concept and initiative, the Humanitarian‐Development‐Peace Nexus (HDPN) aims to improve integration across the traditionally siloed humanitarian, development, and security sectors, while foregrounding the involvement of local actors.
Marie‐Eve Desrosiers, Haley J. Swedlund   +1 more
wiley   +1 more source