Results 231 to 240 of about 911 (305)

Review of challenges and key enablers in energy systems towards net zero target: Renewables, storage, buildings, & grid technologies. [PDF]

Heliyon
Fernandez MI, Go YI, Wong DML, Früh WG.
europepmc   +1 more source

Communicative Drills: The Impact of Communicative Intent on Oral Proficiency

TESOL Quarterly, EarlyView.
Abstract This exploratory study investigated the role of communicative intent in second language (L2) oral practice by comparing communicative and meaningful drills. English language learners played a game designed to elicit repeated use of the second conditional.
Jonathan Serfaty
wiley   +1 more source

Applicability Analysis of High-Voltage Transmission and Substation Equipment Based on Silicon Carbide Devices. [PDF]

Micromachines (Basel)
Zhang H, Nie M, Dong Q, Liu H, Jia P, Li Z, Fang Y.   +6 more
europepmc   +1 more source

Wave‐Velocity‐Based Temperature Monitoring Applied to Underground Power Cables in Medium‐Voltage Networks—Discrimination of Individual Cable Temperatures in a Distribution Grid

High Voltage, EarlyView.
ABSTRACT The thermal state of underground power cables can be monitored based on the temperature dependency of the dielectric permittivity of the insulation material. The resulting temperature‐dependent wave velocity is used as a thermometric property. To this end, the signal propagation time along a cable of an injected signal is determined.
Peter Wouters, Peter van der Wielen, Yan Li   +2 more
wiley   +1 more source

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

High Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang, Xiangyu Zhang, Sihang Wu, Lei Qi, Xiang Cui   +4 more
wiley   +1 more source

Recent Advances in the Design, Modeling, and Control of Flexure-Based Nanopositioning Stages. [PDF]

Micromachines (Basel)
Liu Y.
europepmc   +1 more source

Application Status and Development Trends of DC Ice‐Melting Devices in China's Power Grid

IET Smart Energy Systems, EarlyView.
This paper summarises the development history and engineering application status of DC ice‐melting devices (DCIMD) in China, analyses the principles, advantages, disadvantages and adaptability of mainstream topologies and discusses the key problems and corresponding improvement directions.
Ming Lei, Tianlong Zhang, Zhenglin Li, Jian Wang, Tao Zhang, Peng Wang, Ruiqi Zhan   +6 more
wiley   +1 more source

Hybrid Forecast-Enabled Adaptive Crowbar Coordination for LVRT Enhancement in DFIG Wind Turbines. [PDF]

Entropy (Basel)
Su X, Kim H, Kim C, Zhang M, Jung H.
europepmc   +1 more source

Optimization of Wind‐PV Co‐Generation Systems Using Artificial Bee Colony and Back‐to‐Back Voltage Source Converter

IET Smart Energy Systems, EarlyView.
The Graphical Abstract depicts the proposed Artificial Bee Colony algorithm‐based optimal tuning of PI controllers for back‐to‐back Voltage Source Converters in a hybrid wind–PV system. ABSTRACT This paper proposes a hybrid model‐based back‐to‐back voltage‐source converter (B2B‐VSC) system comprising a Photovoltaic (PV) array and a Permanent Magnet ...
Ch. Sreenu, G. Mallesham, T. Chandra Shekar, Surender Reddy Salkuti   +3 more
wiley   +1 more source

Eectrical grid linked to PV/wind system based fuzzy controller and PID controller tuned by PSO for improving LVRT. [PDF]

Sci Rep
El Sayed NG, Yousef AM, El-Saady G, Alanazi MD, Ziedan HA, Abdelsattar M.   +5 more
europepmc   +1 more source