Results 51 to 60 of about 3,349 (212)

Azerbaycan ve Ermenistan Arasında Bitmeyen Dağlık Karabağ Sorunu

Vakanüvis Uluslararası Tarih Araştırmaları Dergisi, 2017
Bu makalede Karabağ sorunun ortaya çıkışı, sorunun çatışmaya dönüşmesi ve barış için uluslar arası kuruluşların girişimleri değerlendirilmiştir. Sorunun ilk olarak tarihsel süreçteki yerine değinilerek, devamında sorunun kuramsal yaklaşımı ele alınmıştır.
Yunus EKİCİ
doaj   +1 more source

A distribution network solid-state DC circuit breaker with current limiting function

Energy Reports, 2022
The Solid-State direct current (DC) circuit breaker (SSCB) is a key equipment to ensure the safe and reliable operation of medium-voltage DC (MVDC) distribution networks.
Can Ding, Taiping Nie, Yunwen Chen
doaj   +1 more source

Determination of protection system requirements for DC UAV electrical power networks for enhanced capability and survivability [PDF]

, 2011
A growing number of designs of future Unmanned Aerial Vehicle (UAV) applications utilise dc for the primary power distribution method. Such systems typically employ large numbers of power electronic converters as interfaces for novel loads and generators.
Burt, Graeme, Fletcher, Steven, Galloway, Stuart, Norman, Patrick   +3 more
core   +1 more source

Cryogenic DC Circuit Breaker Based on High‐Power Press‐Pack IGBT

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This paper presents the performance of cryogenically compatible 3.3 kV/1.5 kA PP‐IGBTs as the main circuit breaker in a hybrid circuit breaker. The 3.3 kV/1.5 kA press‐pack IGBT can interrupt currents exceeding 5.1 kA when immersed in a liquid nitrogen bath. PP‐IGBTs are promising candidates for high‐power circuit breakers in cryogenically cooled power
Zhongying Wang, Jiawen Xi, Xianwu Zeng, Stefan Steinhoff, Emelie Nilsson, Jean‐Francois Rouquette, Edwin Calderon, Ravi Kiran Surapaneni, Ludovic Ybanez, Xiaoze Pei   +9 more
wiley   +1 more source

Ageing Behaviours and Mechanisms of SiC MOSFET and Si IGBT in DC Solid‐State Circuit Breaker

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
We propose that this distributed thermal profile in IGBT mitigates localised stress. Conversely, the high concentration of thermal stress in SiC MOSFET's gate region leads to its severe ageing. ABSTRACT The rapid development of DC power systems in applications such as electric aircraft and microgrids has highlighted the need for high‐performance DC ...
Jiajia Song, Bo Zhang, Yanfeng Song
wiley   +1 more source

Nikita Hruşov Döneminde SSCB ve Afrika Arasındaki İlişkiler

Ankara Üniversitesi SBF Dergisi, 2020
Hruşov yönetimindeki Sovyet Sosyalist Cumhuriyet Birliği, geçmiş liderlerle kıyasla Afrika siyasetinde değişikliğe gitmiş ve dolayısıyla olağandışı bir durum yaşanmıştır. Kıtanın özellikleri ve uluslararası konjonktürdeki değişiklikler, Moskova’nın bu olağandışı tutumunu ise olağan kılmıştır.
openaire   +4 more sources

An Overview of VSC‐HVDC Systems and Challenges to Harvest Wind Energy Potential Considering South Asian Region as a Case Study

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
The voltage source converter‐based high voltage direct current transmission (VSC‐HVDC) is considered the most appropriate option to harness the maximum potential of renewable energy, particularly offshore wind. With improved reliability and functionality of the network, reduced conversion losses, and reduced cost, the VSC‐based multiterminal direct ...
Muhammad Ahmad, Md Shafiullah, Muhammed Y. Worku, Md Shafiul Alam, Muhammad Khalid, Paul Adedeji   +5 more
wiley   +1 more source

Validation of fast and selective protection scheme for an LVDC distribution network [PDF]

, 2016
Low Voltage Direct Current (LVDC) distribution systems are one of the emerging technologies to recently attract attention for more efficient use of energy, and wider uptake of distributed renewables and energy storage. They do however present significant
Burt, Graeme M., Emhemed, Abdullah A. S., Fletcher, Steven, Fong, Kenny   +3 more
core   +1 more source

A novel thyristor‐based hybrid DC circuit breaker with short arcing capability

High Voltage, Volume 9, Issue 6, Page 1288-1301, December 2024.
Abstract Multi‐terminal flexible high‐voltage direct current (HVDC) transmission and DC grid technology are developing rapidly. The hybrid DC circuit breaker (HCB) has broad application prospects in the field of HVDC transmission and DC power grid. Nevertheless, existing HCBs have one or more following blemishes: arc suppression scheme of mechanical ...
Guanlong Jia, Yuchen Yuan, Hongjiang Guo, Xiaoxue Wang, Feng Niu   +4 more
wiley   +1 more source

A Solid-State Circuit Breaker Based on Coupled-Inductor for Battery Energy Storage System

IEEE Access
In a battery energy storage system (BESS), short-current protection is critical and need to be designed carefully to enhance the system’s safety and reliability.
Kuo-Yuan Lo, Ting-Wei Huang, Kuo-Hsiang Liu   +2 more
doaj   +1 more source