Results 21 to 30 of about 375,639 (295)

Restraint Scheme of Transformer Zero Sequence Differential Protection Based on Tanimoto Similarity

Zhongguo dianli, 2023
As one of the important transformer protections, zero sequence differential protection has the advantages of high sensitivity and strong anti-interference ability.
Jia ZHU, Feng WANG, Yiquan LI, Shaolin JIAO, Xiaochun XU, Qingchun ZHAO   +5 more
doaj   +1 more source

Research on Fault-Tolerant Operation Strategy of Permanent Magnet Synchronous Motor with Common DC Bus Open Winding Phase-Breaking Fault

Energies, 2022
In some key areas, fault-tolerant control is usually needed in order to enable the motor to operate continuously in fault mode. Given that it is difficult to detect the zero-sequence current of the open winding permanent magnet synchronous motor after ...
Kangfei Lv, Xinwei Dong, Cong Zhu
doaj   +1 more source

Unbalanced and Reactive Currents Compensation in Three-Phase Four-Wire Sinusoidal Power Systems

Applied Sciences, 2020
In an unbalanced linear three-phase electrical system, there are inefficient powers that increase the apparent power supplied by the network, line losses, machine malfunctions, etc.
Rafael Montoya-Mira, Pedro A. Blasco, José M. Diez, Rafael Montoya, Miguel J. Reig   +4 more
doaj   +1 more source

An Improved Modulation Method for Parallel Three-Level Rectifiers With Circulating Current Mitigation

IEEE Access, 2023
An improved modulation method is proposed for two parallel three-level interleaved rectifiers to reduce current harmonics and high-frequency zero-sequence circulating current, which uses sinusoidal pulse width modulation.
Yanfeng Li, Hongliang Zhang, Xiao Jing, Aiguang Zhao   +3 more
doaj   +1 more source

Three‐phase isolated power transformer based novel structure for power distribution system and new theoretical/practical judgement criteria in detecting high‐impedance earth faults

IET Renewable Power Generation, 2023
Single phase‐earth faults are the most frequent faults likely to occur but hard to identify in distribution system, especially in a neutral un‐effectively grounded system.
Hua Zhang, Xueneng Su, Longjiang Li, Xin Ning, Rui Zhang, Cheng Long, Shilong Li, Yiwen Gao   +7 more
doaj   +1 more source

Control Strategies for Open-End Winding Drives Operating in the Flux-Weakening Region [PDF]

, 2013
This paper presents and compares control strategies for three-phase open-end winding drives operating in the flux-weakening region. A six-leg inverter with a single dc-link is associated with the machine in order to use a single energy source.
KESTELYN, Xavier, SEMAIL, Eric, SANDULESCU, Paul, MEINGUET, Fabien, BRUYERE, Antoine   +4 more
core   +1 more source

Direct Torque Control for Series-Winding PMSM with Zero-Sequence Current Suppression Capability

, 2023
The series-winding permanent-magnet synchronous motor (SW-PMSM) has the merits of high output power and excellent control performance, as does the open-winding permanent-magnet synchronous motor (OW-PMSM).
Xiaogang Lin, Yuefei Zuo, Zhicong Su
core   +1 more source

Improvement of single-phase grounding fault detection for small resistance grounding systems based on steady-state monitoring information in the substation

Zhejiang dianli, 2023
In order to use the existing hardware sources to improve the line selection performance of single-phase grounding fault of small resistance grounding systems， a method for line selection of single-phase grounding fault based on the global steady-state ...
LIU Jian, ZHU Qingsong, WANG Yizhao, ZHANG Zhihua, CHEN Jieyu   +4 more
doaj   +1 more source

Analysis on Circulating Current and Split Capacitor Voltage Balance for Modular Multilevel Converter Based Three-phase Four-wire Split Capacitor DSTATCOM

Journal of Modern Power Systems and Clean Energy, 2021
We propose a modular multilevel converter (MMC) based three-phase four-wire (3P4W) split capacitor distribution static synchronous compensator (DSTATCOM), aiming at compensating unbalanced and reactive load currents.
Lei Lin, Jialu He, Chen Xu
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