An adaptive scheme to prevent undesirable distance protection operation during voltage instability

被引:62
作者
Jonsson, M [1 ]
Daalder, JE [1 ]
机构
[1] Chalmers Univ Technol, Dept Elect Power Engn, S-41296 Gothenburg, Sweden
关键词
adaptive relaying; distance protection; remote back-up; voltage stability;
D O I
10.1109/TPWRD.2003.817501
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 [电气工程]; 0809 [电子科学与技术];
摘要
An adaptive algorithm to prevent undesirable distance protection operations during voltage instability is proposed. The algorithm is based on mathematical logic blocks and uses the rate of change of voltage as an additional relay criteria to increase the relay security with respect to voltage instability. Studies are based on simulations using two different test systems; a 15-bus system developed by the authors and the Nordic32 system. The investigation shows that undesirable zone 3 distance relay operations can be the difference between a blackout and a recovering system during voltage instability. However, simulations have shown that the adaptive algorithm may save the system from a collapse. Although the algorithm prevents mal-trips due to voltage instability, the reach of the distance relay will not be restricted.
引用
收藏
页码:1174 / 1180
页数:7
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