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Content Provider | IEEE Xplore Digital Library |
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Author | Wang Yuanyuan Zeng Xiangjun Jian Jinbao Liu Sidong |
Copyright Year | 2011 |
Description | Author affiliation: Guangxi University, Nanning, P. R. China (Jian Jinbao; Liu Sidong) || School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha, P. R. China (Wang Yuanyuan; Zeng Xiangjun) |
Abstract | Neutral Ineffectively Earthed Power Systems (NIEPS) is common in China to limit earth fault current and eliminate the need for an immediate shutdown. A new type of high-voltage generator which offers a direct connection to the power network without the need for a step-up transformer is called powerformer. The neutral of the most powerformers is unearthed which belongs to NIEPS. When a stator single phase-to-ground fault occurs in a powerformer, every generator that is connected in parallel with the faulty powerformer has the same voltage. Traditional protection schemes using zero sequence voltage and third-harmonic voltage signals cannot identify the faulty powerformer. In order to solve this problem, a novel stator single phase-to-ground fault protection based on the direction of zero-sequence currents is proposed in this paper. Simulation results have shown that, under different fault conditions, the new scheme can distinguish reliably internal faults from external faults, and 100% of the winding can be fully protected. |
Starting Page | 898 |
Ending Page | 901 |
File Size | 118339 |
Page Count | 4 |
File Format | |
ISBN | 9781457703645 |
e-ISBN | 9781457703652 |
DOI | 10.1109/DRPT.2011.5994020 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2011-07-06 |
Publisher Place | China |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Stator windings Generators Circuit faults Windings Capacitance Circuit breakers selectivity powerformer NIEPS stator single phase-to-ground fault |
Content Type | Text |
Resource Type | Article |
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