Results 241 to 250 of about 5,589,178 (285)

Equivalent Modeling Method for Components with Independent Zero-Sequence Paths

2024 7th International Conference on Mechatronics and Computer Technology Engineering (MCTE)
Qi Guo, Haiping Guo, Shengke Li, Yuanhong Lu, Tianyu Guo, Hui Luo   +5 more
openaire   +3 more sources

Geometry of Zero Sequence Components and Fault in The Power System Earthing

2024 IEEE Third International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES)
Tapas Halder
openaire   +3 more sources

Impact of zero sequence component on voltage-source converters

Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579), 2003
Presently, the preferred circuit of PWM (pulse width modulation) converters has the open-wye 3-phase connection, in which the zero sequence does not exist. Single-line-to-ground fault studies have shown that the grounded-wye connection is better from protection and security consideration.
null Lianxiang Tang, null Boon-Teck Ooi
openaire   +1 more source

Induction machine diagnostics using zero sequence components

Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005., 2005
Induction machine diagnostics using zero sequence components is presented in this paper. Electrical faults cause asymmetries in the phase impedances, producing a zero sequence voltage in wye-connected machines and a zero sequence current in delta-connected machines.
F. Briz, M.W. Degner, P. Garcia, A.B. Diez   +3 more
openaire   +1 more source

An Analytical Simplified Algorithm With Unified Zero-Sequence Component Injection for 3L Symmetrical DPWM

IEEE Transactions on Power Electronics
Qingzeng Yan, Rende Zhao, Chengjian Xing, Yanyan Qin, Qingxiao Du, Jinkui He   +5 more
openaire   +3 more sources

The control and analysis of zero sequence components in DVR system

2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194), 2002
The magnitudes and phases of the compensating voltages in a dynamic voltage restorer (DVR) system depend on the voltage sag in the phases affected by the fault and on the influence of the zero sequence components. If the delta connection of the transformer is used, the zero sequence components do not appear on the load side. But nowadays, wye connected
null Il-Yop Chung, null Sang-Young Park, null Seung-Il Moon, null Seong-Il Hur   +3 more
openaire   +1 more source

A novel method for preventing mal-operation of the zero-sequence directional component

12th IET International Conference on AC and DC Power Transmission (ACDC 2016), 2016
Zero-sequence directional components of the healthy line would incorrectly discriminate the fault direction, causing mal-operation of the pilot zero-sequence directional protection, due to the influence of mutual inductance between lines under weak current and strong magnetic situations.
H.Y. Xu, Z.F. Fan, G.B. Song, X.H. Huang, W. Huang   +4 more
openaire   +1 more source

Three-phase sigma-delta modulation using zero-sequence components

2005 European Conference on Power Electronics and Applications, 2005
This paper presents new analytic results on the performance of sigma-delta modulated (SDM) three-phase voltage source inverters, in terms of harmonic distortion of output current, conduction and switching losses of the inverter devices, and rms current of the DC link capacitor. The results are compared with the same magnitudes for PWM.
A. Mertens, V. Ganesan
openaire   +1 more source

A Unified SVM Algorithm for Multilevel Converter and Analysis of Zero Sequence Voltage Components

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics, 2006
Space vector modulation (SVM) is widely used in three phase converters. This paper presents a novel SVM algorithm in three phase coordinate system which is very simple to implement. In this algorithm, the role of the zero sequence component in SVM is studied, and the switching states and duty ratios are calculated straightforwardly without vector ...
Wang Chenchen, null Li Yongdong, Xiao Xi
openaire   +1 more source

A New Fault Line Selection Method Based on Zero-Sequence Active Component

2010 International Conference on Electrical and Control Engineering, 2010
a new fault line selection method based on the elimination of unbalanced current of zero-sequence active power is proposed by analyzing the principle of active power method and its inaccuracy. The amplitude and phase of real zero-sequence currents can be calculated by the method and the effect of unbalanced current is eliminated.
Wang Chonglin, Xin Jian, Liang Rui, Gu Yuxu   +3 more
openaire   +1 more source