Analysis of Internal Fault Characteristics and Longitudinal Zero-sequence Overvoltage Protection Performance of Large-scale Condenser

被引：0
|
作者：
Gui L. [1 ,2 ]
Li Y. [3 ]
Zhan R. [3 ]
Niu H. [1 ,2 ]
Wang X. [1 ,2 ]
Wang W. [1 ,2 ]
机构：
[1] Department of Electrical Engineering, Tsinghua University, Beijing
[2] State Key Laboratory of Control and Simulation of Power System and Generation Equipments (Tsinghua University), Beijing
[3] China Electric Power Research Institute, Beijing
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 08期
关键词：
Inter-turn short-circuit; Internal fault analysis; Large-scale condenser; Longitudinal zero-sequence overvoltage protection; Split phase transversal differential protection;
D O I：
10.7500/AEPS20181006001
中图分类号：
学科分类号：
摘要：
Large-scale condenser (300 Mvar) has the possibility of stator winding inter-turn short-circuit in practice. It will be a serious hidden danger for the safe operation of the condenser that there is no inter-turn short-circuit protection or the performance of inter-turn short-circuit protection is not perfect. The multi-loop analysis method is used to simulate and analyze all possible internal faults of the large-scale condenser with two different cooling modes. The results show that there is a large dead zone in the existing main protection configuration of the large-scale condenser (complete longitudinal differential protection + longitudinal zero-sequence overvoltage protection). The failure types of longitudinal zero-sequence overvoltage protection is further analyzed, which can provide reference for the performance improvement of the main protection configuration of large-scale condensers. © 2019 Automation of Electric Power Systems Press.
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页码：145 / 149
页数：4
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