Results 31 to 40 of about 12,500,295 (288)

The impact of internal asymmetry of induction motors on the supply network

Science, Technology and Innovation
This paper presents the impact of internal asymmetry in induction motors, such as short circuits, close circuits, stator impedance differences and rotor damage, on the supply network in the form of negative and zero-sequence currents, illustrating the ...
Janusz Petryna, Tomasz Kołacz, Grzegorz Aksamit, Dawid Kara   +3 more
doaj   +1 more source

Detection of Internal Faults in Transformers By Negative Sequence Current

SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology, 2013
Initially it is very difficult to find out internal fault in transformer. These internal fault are hazardous and causes overheating of transformer oil and winding, it consequences as insulation failure because of this uninterrupted power supply cannot be continued. It is more difficult to detect internal fault in small ratting transformer.
Satyam Prakash, Vivek Mishra
openaire   +1 more source

prot4EST: translating expressed sequence tags from neglected genomes [PDF]

, 2004
The genomes of an increasing number of species are being investigated through generation of expressed sequence tags (ESTs). However, ESTs are prone to sequencing errors and typically define incomplete transcripts, making downstream annotation difficult ...
Mark L Blaxter, James D Wasmuth, Blaxter, Mark L, Wasmuth, James D   +3 more
core   +1 more source

Analysis of unbalanced clustered voltage and control strategy of clustered voltage balancing for cascaded H-bridge STATCOM

Journal of Modern Power Systems and Clean Energy, 2019
To explore the clustered voltage balancing mechanism of the cascaded H-bridge static synchronous compensator (STATCOM), this paper analyzes the causes of unbalanced clustered voltage. The negative-sequence current caused by the compensation of unbalanced
Yu Jin, Jianze Wang, Yiqi Liu, Xinagyu Sai, Yanchao Ji   +4 more
doaj   +1 more source

Identification and location method of asymmetric faults in coal mine power network

Gong-kuang zidonghua, 2018
Three asymmetrical faults of singe-phase grounding, singe-phase line breakage and ferroresonance in coal mine power network are easily misjudged, and existing methods hardly identify the three faults correctly.
WANG Qingliang, QIN Jie, LIU Xinru
doaj   +1 more source

Coordinated Control of DFIG Converters to Comply with Reactive Current Requirements in Emerging Grid Codes

Journal of Modern Power Systems and Clean Energy, 2022
The doubly-fed induction generator (DFIG) is considered to provide a low-reactance path in the negative-sequence system and naturally comply with requirements on the negative-sequence reactive current in emerging grid codes.
Yuanzhu Chang, Ilhan Kocar, Jiabing Hu, Ulas Karaagac, Ka Wing Chan, Jean Mahseredjian   +5 more
doaj   +1 more source

A study on the negative sequence current injection during LVRT of IBRs

RE&PQJ
Low Voltage Ride Through (LVRT) behaviour of Inverter Based Resources (IBR) during asymmetrical grid faults is dictated by the requirements of Grid Code (GC) at the Point of Common Coupling (PCC) of the renewable energy plants. Earlier GCs demanded only positive sequence current injection, which gave freedom to inverter manufacturers to implement ...
A. Blázquez, M. Larruskain, E. Torres, P. Eguía, A. Castañon, R. Cimadevilla   +5 more
openaire   +1 more source

A computationally efficient current controller for simultaneous injection of both positive and negative sequences [PDF]

2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017
This work was supported by the Research Promotion Foundation (RPF, Cyprus, Project KOINA/SOLAR-ERA.NET/1215/06), by the Ministry of National Infrastructure Energy and Water (Israel) and the SOLAR-ERA.NET (European Union's Seventh Framework Programme). © 2017 IEEE. Personal use of this material is permitted.
Ali, Zunaib, Christofides, Nicholas, Hadjidemetriou, Lenos, Kyriakides, Elias   +3 more
openaire   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Control Aspects of the Dynamic Negative Sequence Current Injection of Type 4 Wind Turbines

, 2014
© 2014 IEEE. State-of-the-art distributed generation with a fully rated converter only injects positive sequence current into unbalanced faults. Recently, both publications and draft standards have suggested that the injection of negative sequence ...
Neumann, Tobias, Erlich, István, Deconinck, Geert, Wijnhoven, Thomas   +3 more
core   +1 more source