摘要
为了解决变电站增容改造后的特殊接线方式下、传统备自投动作逻辑不能正确动作所带来的停电范围扩大问题,对各种运行方式下发生各类故障时,备自投动作暂态过程进行了详细分析,提出了采用暂态过程自适应逻辑与分段自投加速逻辑相结合的新型备自投方案。通过加入暂态过程特征电气量的变化判据,并有选择地实施加速动作逻辑,实现所有无故障设备自动恢复运行。还对备自投与继电保护的配合问题进行了详细分析。在基本不对备自投硬件和二次回路进行改动的情况下,即能适应目前大多数变电站扩容改造后新的主接线方式,提高供电可靠性。
In order to solve the load loss problem of traditional automatic self switching equipment of backup power source in special power grids after the repairs of the substations, a novel method with dynamic self adaptation logic and self switching acceleration logic is proposed. Without changing any hardware and electric loop, it only needs to modify the software of auto matic self switching equipment of backup power source by adding the related electric variable judgment in the dynamic process of some equipment＇s resuming operation and implementing acceleration logic for the suitable conditions, which can re alize the target that all of the no fault equipments automatically resume power supply. The novel method can be applied to most substations after the capacity expansion reform, and improve the reliability of power supply obviously.
出处
《四川电力技术》
2013年第3期32-36,63,共6页
Sichuan Electric Power Technology
关键词
备自投
自适应
继电保护
电力系统
automatic self - switching equipment of backup power source
self - adaptation
relay protection
power system
