Results 191 to 200 of about 5,298,675 (236)
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High Impedance Fault Area Location in Distribution Systems Based on Current Zero Sequence Component
IEEE Latin America Transactions, 2016This paper presents a new methodology for detection and area location of high impedance faults (HIF) on unbalanced distribution systems. The method is called Quasi-Differential Zero Sequence Protection (PQDSZ) and it detects these faults by analyzing the current zero sequence rms value on a distribution feeder.
J.T.A. Vianna +2 more
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Equivalent Modeling Method for Components with Independent Zero-Sequence Paths
2024 7th International Conference on Mechatronics and Computer Technology Engineering (MCTE)Qi Guo +5 more
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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
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Impact of zero sequence component on voltage-source converters
Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579), 2003Presently, 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
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Induction machine diagnostics using zero sequence components
Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005., 2005Induction 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 +3 more
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The control and analysis of zero sequence components in DVR system
2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194), 2002The 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 +3 more
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Three-phase sigma-delta modulation using zero-sequence components
2005 European Conference on Power Electronics and Applications, 2005This 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
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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), 2016Zero-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 +4 more
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A Unified SVM Algorithm for Multilevel Converter and Analysis of Zero Sequence Voltage Components
IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics, 2006Space 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
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