Results 71 to 80 of about 1,054,199 (245)

Analysis of integration of multi-terminal HVDC network to weak grids

The Journal of Engineering, 2019
In this study, the integration of multi-terminal high voltage direct current (HVDC) systems to weak power grids is analysed under different grid strengths and control methods.
Kamyab Givaki, Md Habibur Rahman, Md Habibur Rahman, Dimitrios Vozikis, Ashkan Giveki   +4 more
doaj   +1 more source

System strength and weak grids: fundamentals, challenges, and mitigation strategies

, 2018
Converter-based renewable energy sources (RES) and battery energy storage (BES) devices that are asynchronously connected to the system are becoming more and more widespread. A number of relevant stability issues, usually in areas with little synchronous
Tapan Kumar Saha, Mancarella, Pierluigi, Ruifeng Yan, Saha, Tapan Kumar, Dozein, Mehdi Ghazavi, Yan, Ruifeng, Mehdi Ghazavi Dozein, Pierluigi Mancarella   +7 more
core   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

RELATIONSHIP BETWEEN WEAK ENTWINING STRUCTURES AND WEAK CORINGS [PDF]

, 2010
Given a commutative ring with unit, -algebra and -coalgebra Triple is called (weak) entwining structure if there is -linear map that fulfil some axioms.
Puspita, Nikken Prima
core   +1 more source

Coordinated Operation and Stability Limits of Grid-Forming and Grid-Following Inverters in Power System Restoration

Energies
As power systems transition from synchronous generation towards inverter-based resources (IBRs), these resources will increasingly need to provide black-start and power system restoration services.
Mohammad Kamran Ikram, Pooyan Alinaghi Hosseinabadi, Mehdi Seyedmahmoudian, Saad Mekhilef, Alex Stojcevski   +4 more
doaj   +1 more source

Trajectory Planning on Grids: Considering Speed Limit Constraints [PDF]

, 2011
Trajectory (path) planning is a well known and thoroughly studied field of automated planning. It is usually used in computer games, robotics or autonomous agent simulations. Grids are often used for regular discretization of continuous space.
Chrpa, Lukáš
core   +1 more source

Enhancing Fatigue Crack Growth Resistance in Heterostructured Aluminum Bimetals by Tailored Interface Design

Advanced Engineering Materials, EarlyView.
Different Al/Al bimetals with a single engineered interface reveal how mechanical mismatch governs fatigue crack growth under cyclic loading. Additionally, loading–unloading–reloading tests link the microyielding behavior to the fatigue crack growth resistance, while crack‐path analysis reveals toughening mechanisms at the interface, highlighting ...
Sebastian Vollath, Philip Manuel Pohl, Heinz Werner Höppel   +2 more
wiley   +1 more source

Controlling Grain Growth in Powder Bed Fusion of Yttria‐Stabilized Zirconia Using Femtosecond Lasers: Challenges and Methodological Insights

Advanced Engineering Materials, EarlyView.
Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn, Sarah Kaden, Andrea Barz, Daniel Störzner, Jens Bliedtner, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Comparison of converter control schemes for weak grids [PDF]

, 2018
Voltage source converter is used in power systems for connecting a renewable energy source to an AC grid or as an active front-end rectifiers in AC motor drives.
Riaz, Usama
core   +1 more source

Impedance-Based Criterion Design for Grid-Following/Grid-Forming Switching Control of Wind Generation System

Energies
As wind farms connect with power grids via long-distance transmission lines and multiple transformers, the resulting networks exhibit inherently weak and fluctuating grid strength—subject to dynamic variations from external disturbances like generation ...
Sijia Huang, Zhenbin Zhang, Zhihao Chen, Huimin Huang, Zhen Li   +4 more
doaj   +1 more source