Results 21 to 30 of about 47,412 (264)

Mathematical description of the method for ungrounded AC systems to determine the network insulation

IET Generation, Transmission & Distribution, 2022
For the safety of humans and animals in the vicinity of single‐phase earth faults in ungrounded AC systems, the development of methods for monitoring the condition of insulation and protection against electric shocks is an important issue.
Iskander Kurabayev, Ivan Suvorov, Arman Utegulov, Galina Tatkeyeva   +3 more
doaj   +1 more source

Simplified Cluster Voltage Balancing Control Based on Zero-Sequence Voltage Injection for Star-Connected Cascaded H-Bridge STATCOM

CSEE Journal of Power and Energy Systems
The cluster DC voltage balancing control adopting zero-sequence voltage injection is appropriate for the star-connected cascaded H-bridge STATCOM because no zero-sequence currents are generated in the three-phase three-wire system.
Kai Hu, Guoliang Zhao, Daorong Lu, Zhengang Lu, Nianwen Xiang, Shulai Wang, Jintian Lin   +6 more
doaj   +1 more source

A Novel Fault-Tolerant Control of Modular Multilevel Converter under Sub-Module Faults based on Phase Disposition PWM

Energies, 2018
Each arm of modular multilevel converter (MMC) consists of a large number of sub-module (SM) units. However, it also increases the probability of SM failure during the long-term system operation. Focusing on the fault-tolerant operation issue for the MMC
Yin Jingyuan, Wen Wu, Wei Tongzhen, Wu Xuezhi, Huo Qunhai   +4 more
doaj   +1 more source

Impedance Modeling and Stability Analysis of Three-Phase Four-Leg Grid-Connected Inverter Considering Zero-Sequence

IEEE Access, 2021
With the increasing applications of grid-connected voltage source converters, it is important to analyze the impedance characteristic of the grid-connected system to implement the stability analysis of the grid connection operation.
Heng Nian, Yuming Liao, Meng Li, Dan Sun, Yunyang Xu, Bin Hu   +5 more
doaj   +1 more source

A Carrier-Based Modulation With Planned Zero Sequence Voltage Injection to Control Neutral Point Voltage for Three-Level Inverter [PDF]

IEEE Access, 2020
In this paper, a carrier-based modulation strategy with planned zero sequence voltage (ZSV) injection for T-type three-level inverter (TLI) is proposed to control neutral point (NP) voltage, which is simple to be implemented. This strategy is analyzed comprehensively based on the relationship between NP current and the injected ZSV in one switching ...
JinPing Wang, Zaiyi Gui, Peixia Wang, Juncan Wang, Weidong Jiang   +4 more
openaire   +2 more sources

Prognosis of Long‐Term Continuous Renal Replacement Therapy and the Impact of Combined Continuous Intravenous Sodium Infusion Therapy

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients requiring long‐term continuous renal replacement therapy (CRRT) generally have poor prognoses. This study evaluated whether adding continuous intravenous sodium infusion (cIVNa) is associated with improved hemodynamics and outcomes in patients undergoing long‐term CRRT for ≥ 7 days.
Akinori Yamaguchi, Atsuyoshi Mita, Kosuke Sonoda, Makoto Harada, Koji Hashimoto, Hiroshi Imamura, Yuji Kamijo   +6 more
wiley   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Phase-to-phase power balance control in flexible interconnection equipment by injecting zero sequence voltage

Xi'an Gongcheng Daxue xuebao
The multi terminal flexible interconnection equipment with cascaded full bridge and dual active bridge structure could connect AC power grid and multiple DC power grid, and instantaneous power differences in different DC power grids and sub module faults
WANG Bo, JI Ziyue, WANG Wanxing, XIAO Chaomin, ZHANG Yan   +4 more
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source