方向继电器在T接线路中的性能分析

SIMULATION AND ANALYSES OF THE PERFORMANCE OF DIRECTIONAL RELAYS ON TEED LINE

对１１０ｋ Ｖ 的 Ｔ 接线路及其所在系统进行了较详细的数字模拟，并对零序分量方向继电器、故障分量阻抗继电器、正序故障分量方向继电器和正序与负序综合故障分量方向继电器在 Ｔ 接线路中应用的性能进行了仿真计算与分析。从计算与分析中可以看出， Ｔ接线路继电保护有它的独特之处，普通线路中性能良好的保护不一定适合 Ｔ接线路。随着电力系统的不断发展，对 Ｔ 接线路继电保护进行更加深入的研究，具有十分重要的理论和实践意义。

In this paper, a digital simulation on teed line and it′s system is presented. The performances of relays on teed transmission line, which include the zero_sequence directional relay, the fault component impedance relay, the directional relay using positive_sequence fault component and the directional relay using composite positive_sequence and negative_sequence fault components, are computed and analyzed. It demonstrates that the protection on teed line has their itself features and the well_behaved protection on normal line may inappropriate on teed line. With the development of power system, especially the development of urban power network, the more teed lines will be come forth, the more research work on protection of teed line is very important to theory and practice.