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Diagnosis of bearing fault in induction motor by zero sequence current
2017 International Conference on Innovative Research In Electrical Sciences (IICIRES), 2017Fault detections are essential for unexpected failures of the electrical motors. Early detection and faults diagnosis leads to effective operations. This paper deals a diagnosis of faults in three phase induction motor by means of zero-sequence stator current spectrum. The simulation and experimental setup are designed under bearing faults.
P. Kripakaran, B. Rami Reddy
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A Review of System Grounding Methods and Zero Sequence Current Sources
2008 61st Annual Conference for Protective Relay Engineers, 2008The purpose of this paper is to provide a tutorial or "refresher" on grounding methods, sources of ground current, ground current flow in the power system, and how each impacts protective relaying. With retirements, new hires, reorganization, cross training, and so on, this subject, like many others, requires regular review to maintain the experience ...
Gerald Johnson +2 more
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The Research on the Zero Sequence Circulating Current Suppression in Parallel Inverters
2012 Asia-Pacific Power and Energy Engineering Conference, 2012That inverters work in direct parallel would increase the reliability and capacity, and also reduce the cost and volume for tidal current generation system, but the zero sequence circulating current will be generated. The state model of the parallel connected inverters is constructed in synchronous rotating coordinates, the mechanism of circulating ...
Yaohua Luo +4 more
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IEEE Transactions on Applied Superconductivity, 2014
A 500 kV saturated iron-core superconductive fault current limiter (SISFCL) has been designed to be installed in an extra high voltage (EHV) transmission system in southern China. We carried out studies on compatibility and coordination problems in the application of this kind of device in an EHV network.
null Bin Li +5 more
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A 500 kV saturated iron-core superconductive fault current limiter (SISFCL) has been designed to be installed in an extra high voltage (EHV) transmission system in southern China. We carried out studies on compatibility and coordination problems in the application of this kind of device in an EHV network.
null Bin Li +5 more
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Research on zero-sequence current calculation method for VSC and circulation current of parallel VSC
2017 2nd International Conference on Power and Renewable Energy (ICPRE), 2017Renewable energy usually adopts flexible grid connection technology which based on three-phase voltage source converter (VSC) and droop control to connect with the distribution. Zero-sequence current of three-phase VSC has influence on on-state loss current and zero-sequence circulating current.
Di Wu +5 more
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Zero-Sequence Current Distribution Along Transmission Lines
IEEE Transactions on Power Apparatus and Systems, 1969The zero-sequence current distribution among ground wires and the ground-return path of overhead transmission lines is subject to change in the vicinity of a ground fault and the feeding point. This paper introduces the concepts used in connection with the end-effect phenomena of transmission lines and describes the necessity for solving the end-effect
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IEEE Transactions on Industrial Electronics, 2017
A zero-sequence circulating current (ZSCC) is typically generated among the multiparallel converters that share the common dc link and ac side without isolated transformers under the space vector modulation (SVM), due to the injected third-order zero-sequence voltage (ZSV).
Rongwu Zhu +3 more
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A zero-sequence circulating current (ZSCC) is typically generated among the multiparallel converters that share the common dc link and ac side without isolated transformers under the space vector modulation (SVM), due to the injected third-order zero-sequence voltage (ZSV).
Rongwu Zhu +3 more
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2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2015
It is difficult to select the fault line due to the weak current when the single-phase grounding fault occurs in the resonant grounding system. A new method based on correlation between zero-sequence voltage in bus and zero-sequence current in feeders is proposed in this paper.
Yunkun Xiang +4 more
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It is difficult to select the fault line due to the weak current when the single-phase grounding fault occurs in the resonant grounding system. A new method based on correlation between zero-sequence voltage in bus and zero-sequence current in feeders is proposed in this paper.
Yunkun Xiang +4 more
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Single phase to ground fault location based on phase of zero-sequence current
2013 IEEE International Conference on Information and Automation (ICIA), 2013With the continuous development of society and the improvement of people's life, people are increasingly concerning about the safe operation of the power grid, and single phase to ground fault of distribution networks is one of the problems. Because more branch of distribution networks and complex structure, the traditional methods can't achieve ...
Jinjie Li +3 more
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Zero-sequence current dynamics in parallel-connected voltage source converters
2009 IEEE Electric Ship Technologies Symposium, 2009Multiple three-phase voltage source converters may be connected in parallel to supply an AC voltage bus or a load in excess of the rating of an individual power converter. Without a circulating path, a zero-sequence current generally does not exist in a single power converter; however, it typically exists in parallel-connected three-phase power ...
null Yu Zhang, null Zhenhua Jiang
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