Results 41 to 50 of about 1,075,155 (309)
Progressive fault isolation and grid restoration strategy for MTDC networks [PDF]
, 2018 A multi-terminal dc (MTDC) grid has a number of advantages over traditional ac transmission. However, dc protection is still one of the main technical issues holding back the expansion of point-to-point dc links to MTDC networks.
Adamczyk, Andrzej +5 more
core +1 more source
DC Microgrid Protection in the Presence of the Photovoltaic and Energy Storage Systems [PDF]
Journal of Operation and Automation in Power Engineering, 2018 In recent years, most of the loads and distributed generations are connected to the AC grid through the power electronic converters. Using the DC grid beside the AC grid can reduce the conversion stages and power losses.
K. Mazlumi, A. Shabani
doaj +1 more source
Electro-thermal analysis of power converter components in low-voltage DC microgrids for optimal protection system design [PDF]
, 2017 Bidirectional power converters are considered to be key elements in interfacing the low voltage dc microgrid with an ac grid. However to date there has been no clear procedure to determine the maximum permissible fault isolation periods of the power ...
Burt, Graeme +4 more
core +1 more source
Modular Multilevel Converter DC Fault Protection [PDF]
IEEE Transactions on Power Delivery, 2018 High voltage direct current grids will require the development of dc protections that provide fast fault isolation and minimize the disturbance caused to the existing ac power networks. This paper investigates how the dc fault recovery performance of a half-bridge modular multilevel converter (HB-MMC) is impacted by different dc protection design ...
Cwikowski, O +6 more
openaire +4 more sources
Intersystem fault between MMC‐HVDC and AC systems and its impact on DC/AC protection
IET Generation, Transmission & Distribution, 2022 Flexible DC and AC transmission lines can be arranged across vertically or sharing transmission corridor. Under this condition, the possibility of intersystem fault increases significantly, which endangers the safety of both DC and AC systems.
Wenbo Wang +5 more
doaj +1 more source
ROCOV scheme for Fault Detection and Location in HVDC sytems [PDF]
, 2019 A reliable DC fault protection system is essential for the development of HVDC grids. Therefore, this paper deals with the voltage derivative ROCOV scheme to locate and detect DC faults.
Abarrategi, O. +4 more
core +2 more sources
Molecular Oncology, EarlyView.In this explorative study, the abundance of circular RNA molecules in bone marrow stem cells was found to be elevated in patients with high‐risk myelodysplastic neoplasms, and to be associated with an increased risk of progression to acute myeloid leukemia.
Eileen Wedge +17 more
wiley +1 more source
Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
wiley +1 more source
Phytopathologia Mediterranea, 2023 In Europe and the Mediterranean region, ‘Candidatus Liberibacter solanacearum’ (Lso) is associated with emerging diseases of Apiaceae crops, mainly carrot.
Lorenza TIZZANI +4 more
doaj +1 more source
Evaluation of the impact of high bandwidth energy storage systems on DC protection [PDF]
, 2015 The integration of high bandwidth energy storage systems (ESS) in compact DC electrical power systems can increase the operational capability and overall flexibility of the network. However, the impact of ESSs on the performance of existing DC protection
Burt, Graeme M. +4 more
core +1 more source