Results 1 to 10 of about 47,412 (264)

Attenuation of Zero Sequence Voltage Using a Conventional Three-Wire Dynamic Voltage Restorer [PDF]

Energies, 2021
Voltage sags/swells and harmonics are recurring problems in electric energy distribution systems. In order to solve these issues, several dynamic voltage restorer (DVR) topologies, such as the conventional three-wire DVR, have been proposed in the ...
Rafael Neto, Yandi Landera, Francisco Neves, Helber de Souza, Marcelo Cavalcanti, Gustavo Azevedo   +5 more
doaj   +2 more sources

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

DC Voltage Balancing Strategy of a Bipolar-Output Active Rectifier for More Electric Aircraft Based on Zero Vector Redistribution

IEEE Access, 2021
The ±270 V bipolar dc distribution has become an attractive power supply scheme in more electric aircraft (MEA). In this paper, a dc voltage balancing strategy based on zero vector redistribution (ZVR) is proposed for a three-phase coupled ...
Yajun Zhao, Wenxin Huang, Feifei Bu
doaj   +1 more source

Efficient Zero-Sequence Impedance Measurement in Autotransformers Using Low-Voltage Excitation

Applied Sciences, 2023
In accordance with the IEEE standard, the zero-sequence impedance test of transformers necessitates an open or short circuit test on the high-voltage side winding.
Min Zhang, Jian Fang, Hongbin Wang, Qingdan Huang, Haicheng Hong, Xiang Lin, Niancheng Zhou   +6 more
doaj   +1 more source

Design of a mine-used low-voltage leakage protection device

Gong-kuang zidonghua, 2020
In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device was ...
ZHENG Qingle, RONG Xiang, YANG Fan, LI Rui   +3 more
doaj   +1 more source

AC Fault Ride-Through Strategy of a Transformerless Soft Normally Open Point

Applied Sciences, 2022
This paper focuses on the soft normally open point (SNOP) which has no transformers and connects to the 10 kV distribution network through the arc suppression coil grounding mode.
Feng Xu, Xiaoming Huang, Yi Lu, Zheren Zhang   +3 more
doaj   +1 more source

Zero-sequence Current Suppressing Strategy for Dual Three-phase Permanent Magnet Synchronous Machines Connected with Single Neutral Point

CES Transactions on Electrical Machines and Systems, 2022
Dual three-phase permanent-magnet synchronous machines (DTP-PMSM) connected with a single neutral point provide a loop for zero-sequence current (ZSC). This paper proposes a novel space vector pulse width modulation (SVPWM) strategy to suppress the ZSC ...
Zongwang Li, Yuxuan Du, Jinghua Ji, Tao Tao, Wenxiang Zhao   +4 more
doaj   +1 more source

Flux Weakening Controller Design for Series-Winding Three-Phase PMSM Drive Systems

World Electric Vehicle Journal, 2023
Series-winding three-phase PMSMs have a higher bus voltage utilization than the conventional three-phase PMSMs with star connection. This topology is suitable for applications with a limited bus voltage. However, the zero-sequence current controller will
Senyi Liu, Zaixin Song, Bowen Zhang, Chunhua Liu   +3 more
doaj   +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

Zero-Sequence Current Suppression for Open-Winding Permanent Magnet Brushless Motor Driving System Based on Second Order Generalized Integrator

IEEE Access, 2020
The open-winding driving system can improve power density and torque output capacity of the motor. However, the open-winding topology with a common direct current (DC) power supply provides a path for the zero-sequence current, which contributes to the ...
Qing Lu, Yuefei Zuo, Tao Zhang, Lihong Mo   +3 more
doaj   +1 more source