Results 31 to 40 of about 1,353,401 (296)

Reliability Improvement Strategy for Transformer Zero-Sequence Differential Protection Based on Zero-Sequence Current Amplitude Difference Characteristics

Zhongguo dianli
The zero-sequence differential protection of transformer may cause the reliability to decrease or even malfunction due to the fault of current transformer (CT) when dealing with complex inrush current and fault.
Junchao ZHENG, Yaming GE, Xiangping KONG, Xuchao REN, Shi CHEN, Chenqing WANG   +5 more
doaj   +1 more source

Research on dead-time compensation of common DC bus OW-PMSM based on 120°decoupling modulation

Energy Reports, 2022
To suppress the switching dead-band in the Open-End Winding Permanent Magnet Synchronous Machine with Common DC bus (OW-PMSM-CDCB) drive system, the dual-inverter switch dead-band generates zero-sequence voltage and current during 120°decoupling ...
Shirui Xie, Yinhang Ning, Zhaoyuan Zhang, Haihong Qin, Xinpeng Feng, Chaohui Zhao   +5 more
doaj   +1 more source

Geometric path planning without maneuvers for nonholonomic parallel orienting robots [PDF]

, 2016
Current geometric path planners for nonholonomic parallel orienting robots generate maneuvers consisting of a sequence of moves connected by zero-velocity points.
Grosch Obregon, Patrick John, Thomas, Federico   +1 more
core   +2 more sources

Research on Circulating Current Suppression Control of Parallel Inverters

Energies
Circulating current suppression can effectively improve the reliability and redundancy of parallel inverter systems. The mechanism and influencing factors of the low- and high-frequency zero-sequence circulating current (ZSCC) are analyzed in this study.
Yibiao Fan, Lixia Tong, Xiaoping Wang, Xiaowei Cai, Zhihe Fu, Junhui Zhou, Shuangmao Huang, Xingkui Mao   +7 more
doaj   +1 more source

Deadbeat Predictive Current Control for Series-Winding PMSM Drive with Half-Bridge Power Module-Based Inverter

Energies, 2021
Series-winding topology (SWT) could improve the DC-link voltage utilization, as open-winding topology does. Meanwhile, it can greatly reduce the number of power devices. Firstly, for the half-bridge power modules (HBPMs)-based inverter, an N-phase series-
Zhiping Dong, Chunhua Liu, Senyi Liu, Zaixin Song   +3 more
doaj   +1 more source

Analysis of Mine Low-voltage Leakage Protection in Situation of Great Disparity between Long and Short Lines and Big Unbalanced Current

Gong-kuang zidonghua, 2010
The paper explained that traditional leakage protection principles such as zero-sequence direction relay principle and zero-sequence current's maximum principle are unable to implement selective leakage protection in situation of great disparity between ...
SU Po, CHEN Qing
doaj   +2 more sources

Characteristic Quantity Analysis of Single-Phase Contact Tree Ground Fault of Distribution Network Overhead Lines

Energies, 2023
When the overhead line passes through the forest area, the conductor may contact the line to induce the tree-contact single-phase-to-ground fault (TSF), and the persistence of TSF may induce wildfires, bringing serious consequences.
Jianbo He, Yao Zhou, Yilin Li, Guangqing Zhang, Jiayu Liang, Hao Shang, Wenjun Ning   +6 more
doaj   +1 more source

Seeing double with K2: Testing re-inflation with two remarkably similar planets around red giant branch stars [PDF]

, 2017
Despite more than 20 years since the discovery of the first gas giant planet with an anomalously large radius, the mechanism for planet inflation remains unknown.
Ansdell, Megan, Chaplin, William, Foreman-Mackey, Daniel, Fulton, Benjamin, Gaidos, Eric, Grunblatt, Samuel K., Howard, Andrew, Huber, Daniel, Isaacson, Howard, Lin, Douglas N. C., Lopez, Eric, Nofi, Larissa, North, Thomas S. H., Petigura, Erik, Sinukoff, Evan, Vanderburg, Andrew, Weiss, Lauren, Yu, Jie   +17 more
core   +4 more sources

Evolutionary tracks for Betelgeuse [PDF]

, 2016
We have constructed a series of non-rotating quasi-hydrostatic evolutionary models for the M2 Iab supergiant Betelgeuse ($\alpha~Orionis$). Our models are constrained by multiple observed values for the temperature, luminosity, surface composition and ...
Dearborn, David S. P., Dolan, Michelle M., Herczeg, Gregory J., Lam, Doan Duc, Lan, Nguyen Quynh, Mathews, Grant J.   +5 more
core   +1 more source

THE INFLUENCE OF ZERO SEQUENCE CURRENTS ON PHASE CURRENT REDUCTION IN ASYMMETRICALLY TAPPED SYSTEMS

SSRN Electronic Journal
This paper addresses the counter-intuitive phenomenon of phase current reduction in a three-phase system with asymmetrical tap changer positions. Specifically, the study examines cases where a transformer's phase B tap is stuck and is unable to switch while phases A and C are at lower taps.
Mehmood, Rana Shaheer, Zhang, Peng
openaire   +2 more sources