摘要
通过比较传统比率制动式母差保护与微机母差保护的工作原理和性能特点,重点对母线运行方式的适应性、电流回路的“软件切换”、TA饱和的检测原理等微机保护的新特点进行了对比,对比率制动式差动元件在母线区外故障且TA饱和情况下的灵敏度和区内故障有电流汲出母线时的稳定性进行了较详细的定量计算和分析,综合阐述了推广使用微机型母差保护装置的可行性和必要性。
This paper compares the work principle and function features between traditional ratiorestraint and computerbased bursbar differential protections and highlights the adaptability to various busbar operation modes, “software changeover” of current circuits, compares the principle of detection and test of current transformer saturation, and other new features of computerbased protection over traditional one. It also quantitatively analyzes the sensetivity of ratiorestraint differential element under the condition of outzone fault with TA (current transformer) saturation and the stability during inzone fault with current flowing out of bus. Based on these, the necessity and feasibility of using computerbased bus protection are come to conclusion.
出处
《河北电力技术》
2005年第2期21-23,45,共4页
Hebei Electric Power
关键词
微机保护
继电保护
母差保护
应用比较
computerbased protection
relay protection
busbar differential protection
comparison of application
