一种新型选相方案

针对目前微机保护中选相元件的不足,提出了几种新型的数字式选相元件,重点探讨了基于模故障分量的选相元件,基于电压序分量的选相元件和弱电源侧电压选相元件,由此构成了一套完整的微机线路保护选相方案。针对这几种选相元件作了比较详尽的分析,进行了横向和纵向的比较。最后,利用ATP与MAT LAB仿真运算验证了新方案的有效性和可靠性。

A new phase-selecting scheme

Aiming at the shortcomings of phase-selecting components existing in microcomputer-based protection, it proposes some new digital phase-selecting components, of which are modal transformation based on fault-component phase selector, voltage sequence-component selector and voltage selector on weak source side.These components constitute an integrated phase-selecting scheme of microcomputer-based protection.This paper analyses these phase selectors at length,and compares them with eath other.At last,the effectiveness and reliability of the scheme are verified with ATP and MATLAB simulation.