智能变电站断路器非全相保护的优化

Optimization of Three-phase Inconsistent Protection of Circuit Breaker for Smart Substation

针对本体非全相保护回路可靠性不高的问题,借鉴微机保护高可靠性的模块化设计思路,提出了一种标准化的本体非全相保护回路。通过分析微机非全相保护的运行效果,发现因考虑位置判据可靠性问题而附加的电流判据限制了其作用。利用智能变电站信息共享特点,综合2种非全相保护的优点,给出了适用于智能变电站的微机非全相保护及配置优化具体方案。

Aiming at the problem of low reliability of the body three-phase inconsistent protection circuit and referring to the highly reliable modular design of microcomputer protection,this paper proposes a standard body three-phase inconsistent protection circuit.Then,this paper finds that the function of the microcomputer three-phase inconsistent protection is limited by analyzing its operation effect,because the additional current criterion is set considering the reliability of the position criterion.Finally,this paper proposes a microcomputer three-phase inconsistent protection for smart substation and a specific configuration optimization scheme,which utilizes the characteristic of information sharing of smart substation and combines the advantages of these protections.