期刊论文详细信息
Journal of Control Engineering and Applied Informatics
Adaptive distance protection for 110 kV double circuit transmission line
Borascu Ionut Ciprian1 
[1] Universitatea Politehnica din Bucuresti
关键词: adaptive algorithms;    error correction;    fault detection;    protection;    resistance.;   
DOI  :  
学科分类:农业科学(综合)
来源: Societatea Romana de Automatica si Informatica Tehnica
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【 摘 要 】

Abstract: This article approaches the precision of the distance protection relay under earth fault conditions with high fault resistance on one circuit of a 110 kV double circuit configuration line. Using adaptive trip mechanisms, the reliability and selectivity of the conventional distance protection algorithm from a double circuit transmission line are improved. In the scheme, to aid the typical distance protection algorithm to be immune to the influence of the zero sequence mutual impedance and to the high fault resistance, the tilt angle? is calculatedand used for changing the position of the fault impedance on R-X plane. Using only local signals, two current distribution factors are used to calculatethe zero sequence current of the healthy parallel circuit and the zero sequence fault current. In case that the currents of the parallel circuit can be injected into the distance protection relay, the tilt angle ? can be estimated with only one current distribution factor. Comprehensive phase to earth shortcircuits with high fault resistance are simulated on one circuit of a 110 kV double configuration transmission line. The shortcircuit scenarios confirm that the distance protection determine an instantaneous trip of the 110 kV circuit breaker of the faulted line, even in the presence of single-phase faults with fault resistance of 50 ohms.

【 授权许可】

CC BY   

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