突变量电流选相元件的研究

本文提出了一种利用相电流突变量和相电流差突变量构成的选相元件。对选相元件的算法进行了理论分析,并利用EMTP电磁暂态仿真程序,模拟不同地点、不同类型的各种故障。仿真结果,证明该选相元件能够正确选相。适合于作为微机保护中的选相元件。

A NEW ALGORITHM FOR FAULT TYPE SELECTION AND CLASSIFICATION BASED ON THE SUPERIMPOSED COMPONENT OF CURRENT

This paper describes a new algorithm for phase selection and fault classification based on the superimposed component of current. The first part presents a theory analysis for the algorithm. The second part presents an experimental results. To test many of the programs developed in the laboratory, a series of solid and arc risistance fault were simulated at various points of typical 500kv transmission line. The results show that the criterion of fault classification is ocrrect. And finally, the methed is available for microcomputer protective relay.