摘要
介绍了微机保护装置端口定义、快速瞬变脉冲群的特点以及对微机保护装置的影响。重分析了快速瞬变脉冲群对数据采集系统的影响,即造成保护装置误动、拒动。指出抑制瞬变干的对策有减小辅助变流器和变压器原、副方绕组的耦合电容,增加共模干扰回路阻抗以及“两次样”的软件方案等。
The port definition of numerical protection,the features of electrical fast transient/burst(EFT)and its influence on numerical protection introduced.The influences of EFT on the data ac-quisition system of numerical protection are emphasized:improper functioning.The countermeasures to improve the immunity against EFT are decreasing the coupling capacitor between the primary and the secondary windings of CT or P T,using the ferrites to absorb the transient energy ef-fectively,applying'double sampling'software solution,etc.
出处
《电力自动化设备》
EI
CSCD
北大核心
2004年第1期14-19,共6页
Electric Power Automation Equipment
关键词
微机继电保护
数据采集系统
快速瞬变脉冲群
numerical protection
data acquisition system
electrical fast transient/burst
