Results 121 to 130 of about 756 (255)

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

open access: yesHigh 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   +4 more
wiley   +1 more source

A multiplexing controllable line-commutated converter without commutation failures

open access: yesInternational Journal of Electrical Power & Energy Systems
Kang Liu   +5 more
openaire   +1 more source

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

open access: yesIET 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   +6 more
wiley   +1 more source

Long‐term patterns of breeding range expansion mirror invasion dynamics during recolonisation of a semi‐colonial raptor

open access: yesJournal of Animal Ecology, EarlyView.
We used a unique long‐term dataset of population recovery in the Osprey Pandion haliaetus to reveal the similarity in spatial patterns underpinning recolonisations and biological invasions. Our findings highlight the importance of rare pioneering movements in driving range expansion, and the value of conservation interventions such as species ...
Brittany C. Maxted   +5 more
wiley   +1 more source

Climate Change and (Mal)Adaptation in Tourism‐Intensive Alpine Regions

open access: yesThe Political Quarterly, EarlyView.
Abstract Tourism, especially in winter, accounts for a large share of economic income in Alpine regions. At the same time, these regions are more severely affected by climate change, leading to shorter winter seasons and reduced snow cover. This presents a pressing issue for areas reliant on income from winter tourism through activities such as skiing.
Valentina Ausserladscheider
wiley   +1 more source

Smart Solutions: A New Direct Current Electric Machine Design to Reduce Weight and Enhance Efficiency. [PDF]

open access: yesGlob Chall
Ivliev D   +5 more
europepmc   +1 more source

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