永久性接地 meaning in English
permanent earth
solidly ground
Examples
- Unified power flow controller ( upfc ) is one of the most powerful and most promising controllers of facts . if we use upfc to control the transmission parameters , terminal voltage , line impedance and phase angle in normal situation and use it to compensate zero sequence and negative sequence currents when one of transmission lines is cut off , we can implement two phases operating in high voltage transmission lines , which can improve stability and reliability for the transmission system
统一潮流控制器（ upfc ）是功能最强、最具发展潜力的灵活交流输电系统（ facts ）控制器之一，如果在常规条件下，用upfc实现输电线路的电压调节、移相、潮流控制、阻尼振荡等功能，在发生单相永久性接地或单相断路故障时，由传统的三相跳闸改为单相跳闸，用upfc的并补来滤除两端系统的零序和负序电流，用upfc的串补来提高输电线的传输功率，以实现两相长期运行，那么输电系统的稳定性、可靠性将大大提高。 - On the function study basis of main doublized protection type 11 and type 902 micro computer line protection device , taking permanent single phase fault occuring on power line within protected district as example , the paper analized in detail the acting behavior of type 11 and type 902 computer line protection device
摘要在对构成线路主保护双重化的11型和902型微机线路保护装置功能研究的基础上，以线路发生区内单相永久性接地故障为例，对11型和902型微机线路保护装置动作行为作了详细分析。