Results 71 to 80 of about 5,225 (215)

System configuration, fault detection, location, isolation and restoration: a review on LVDC Microgrid protections [PDF]

, 2019
Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections
Bououden, Burt, Callavik, Dong Chen, Mitchell, Mohamed Emad Farrag, Oudalov, Waqas Javed, Wu, Xue, Yan Xu, Zhong   +11 more
core   +1 more source

A Re‐Examination of Foundational Elements of Cosmology

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley   +1 more source

Unveiling Hidden Features of Strongly Correlated Quantum Systems Through a Complex‐Network Analysis

Advanced Quantum Technologies, Volume 9, Issue 3, March 2026.
By applying complex network theory, we report a fundamental and previously unobserved phenomenon in the finite‐size Kitaev model: a singular point at which uniform, nonzero entanglement emerges among all fermion pairs, forming a complete entanglement network.
Guillem Llodrà, Roberta Zambrini, Gian Luca Giorgi   +2 more
wiley   +1 more source

Research on emergency DC power support coordinated control for hybrid multi-infeed HVDC system

Archives of Electrical Engineering, 2020
Based on the respective characteristics of line-commutated converter high-voltage direct current (LCC-HVDC) and voltage-source converter high voltage direct cur- rent (VSC-HVDC), two additional emergency DC power support (EDCPS) controllers are designed,
Congshan Li , Yikai Li, Jian Guo, Ping He   +3 more
doaj   +1 more source

Single‐ and Two‐Mode Squeezing by Modulated Coupling to a Rabi Driven Qubit

Advanced Quantum Technologies, Volume 9, Issue 3, March 2026.
A scheme for the generation of single‐ and two‐mode conditional‐squeezing of quantum harmonic oscillators by modulated coupling to a Rabi‐driven qubit is proposed. Simulations of a circuit QED system employing the scheme predict squeezing of more than 12dB and preparation of a superposition of 4dB squeezed states.
Eliya Blumenthal, NIr Gutman, Ido Kaminer, Shay Hacohen‐Gourgy   +3 more
wiley   +1 more source

Control strategy of novel hybrid commutated converter based on reverse blocking integrated gate commutated thyristor for commutation failure mitigation

High Voltage
Commutation failure (CF) is an inherent problem faced by line commutated converter high voltage direct current (LCC‐HVDC) technology. To completely solve the problem of CF, we have proposed a novel hybrid commutated converter (HCC) technology based on ...
Zongze Wang, Zhanqing Yu, Lu Qu, Zhichang Yuan, Kangsheng Cui, Jian Shi, Biao Zhao, Rong Zeng   +7 more
doaj   +1 more source

Electrochemical energy storage systems for solar thermal applications [PDF]

Existing and advanced electrochemical storage and inversion/conversion systems that may be used with terrestrial solar-thermal power systems are evaluated.
Frank, H., Krauthamer, S.
core   +1 more source

High Voltage DC Active Current Injection to Simulate Geomagnetically Induced Currents in New Zealand

Space Weather, Volume 24, Issue 3, March 2026.
Abstract This study investigates the effects of geomagnetically induced currents (GIC) on New Zealand's electrical infrastructure via an intentional ground injection of direct current (DC) from a high voltage DC converter station. GIC manifests as quasi‐DC currents within power systems, potentially causing transformer saturation, increased reactive ...
Soren Subritzky, Andrew Lapthorn, Stewart Hardie, Paul Agger, Mike Dalzell, Mark A. Clilverd, Neil Cobbett, Ciaran Beggan, Juliane Hübert, Eliot Eaton, James B. Brundell, Craig J. Rodger   +11 more
wiley   +1 more source

New Monolithic Modular DC-DC Converter for Constant Current Offshore Interconnection With VSC HVdc Network

IEEE Access
The rapid growth in HVDC (High Voltage Direct Current) grids has shown the falls of point-to-point connections. Several challenges such as the requirement of DC (Direct Current) fault blocking capability, interfacing of different grounding schemes ...
Mohamed Mansour, Mohamed G. Abdel-Moneim, Ayman S. Abdel-Khalik, Shehab Ahmed, Khaled H. Ahmed   +4 more
doaj   +1 more source

AC fault ride through control strategy on inverter side of hybrid HVDC transmission systems

Journal of Modern Power Systems and Clean Energy, 2019
Hybrid high-voltage direct current (HVDC) transmission systems employ a new type of HVDC transmission topology that combines the advantages of the line-commutated converter system and the voltage-source converter system.
Zexin Zhou, Zhengguang Chen, Xingguo Wang, Dingxiang Du, Guosheng Yang, Yizhen Wang, Liangliang Hao   +6 more
doaj   +1 more source