This device which is designed on the basis of " gradual identifying law " has such characteristics as accurately locating the fault point , being simple to operate and having a good adaptability 根据“递进信息法”设计出的小电流馈线接地故障定位装置,具有定段准确、操作简单和适应性强的特点。
The single - phase grounding fault frequently occurs in neutral ungrounded system , the fault line and fault location must be found to avoid a phase - to - phase short as soon as possible 单相接地故障在小电流接地系统中出现的比较频繁，此时必须尽快找到故障线路以及大致的故障点，以避免两相对地短路。
When a single phase fault happened , the fault current is too low to affect the symmetry of a given power system . according to the regulations , it is admissible to run with fault for 1 hour or 2 小电流接地系统发生单相接地之后，因为故障电流很小，不至于影响系统的对称运行，所以，按照规程，可以继续运行1 2小时。
This dissertation successfully developed a vlst digital signal processing single system , using tms320f240 as its central processing unit ( cpu ) , finished the function of line - selecting of non - solid grounded networks 在本设计中，以tms320f240为cpu ，以模块化设计完成装置的开发，基本实现了小电流接地系统的选线功能。
And the method is simulated with matlab . the paper designs a hardware system and software system to implement the cutting - low - switch . the hardware adopts dsp , and the software adopts c and assemble language 基于本文算法设计了能进行小电流速断的智能开关，文中给出了基于c语言和汇编的软件设计，和基于dsp的硬件设计。
Further , the methods are proposed to compare and summarize for choosing fault line and detecting distance in neutral ungrounded system . subsequently , the characteristics of zero sequence current and transient courses are introduced and analyzed 接着对小电流接地系统单相接地故障时零序电流的暂态过程及特点做了介绍和分析。
It can be predicated that the study results are useful to the design of overvoltage protective device in electric power system and the development of canceling arc light earthed overvoltage device and small electric current chosen equipment 本文的研究结果对电力系统过电压保护装置的设计及消除弧光接地过电压和小电流选线装置的开发具有实际指导意义。
To reduce power dissipation of the amplifier , a kind of on / off technology is used in the circuit . with a little bias current circuit to control the main bipolar transistor operation , the transistor will be in a state of on / off 采用器件旁路小电流工作电路,实现对低噪声放大器主要工作晶体管的控制,使该晶体管按需要分别处于工作或关断状态,保证了放大器的极低功耗。
It is troublesome when it comes to a single phase fault happened on a non - direct - ground system , a host of scholars have dwelt on it . actually , most of these works are based on steady conditions 长久以来，小电流接地系统单相接地的故障选线和故障定位问题一直没能很好的解决；很多学者做了大量的工作，但是，这些工作很多都是基于单相接地时稳态电容电流的分析的结果。
The single phase grounding fault location is the focus which researchers pay attention to and study in the small current grounding power systems . with the improvement of automatic level in distribution systems , the study about it is urgent daily 小电流接地系统单相接地故障定位一直是人们关注和研究的焦点，随着配电网自动化水平的提高，对其研究的迫切性已日益紧迫。
