Fault location is an importrant function in distribuiton automation . in the thesis , the transferred information from feeder terminal unit is computed with load ’ s trapezoid fuzzy figure . the fault location is affirmed by the result of computation using the trapezoid fuzzy math theory . the atp and matlab softwares are used to simulate the 10kv lines in urmuqi distribution network . and the results shows the reliability and accuration of the method in the thesis 线路故障定位是配电自动化的一项重要功能,文中提出利用线路始端电压、电流和线路ftu (馈线终端单元, feederterminalunit )的上传信息,结合配电变压器负荷的梯形模糊数模型,运用模糊数学理论通过电流计算来进行故障定位的新方法。
Secondly , the following two subjects are discussed according to the calculation of short - circuit current : ( l ) to verify the dynamic stability condition of wires by using simulated annealing algorithm ( sa ) , the paper calculates the maximum value of rectangle wires " short - circuit electrodynamic stress and gets the conditions of their having the maximum value . furthermore , some concerned data about the verifying of copper wires are given by analysing vibration spectrum of the electrodynamic stress ; ( 2 ) in order to get the heat withstand conditions of wires , the paper discusses some common calculation methods , and then tries to study the problem applying artificial neural network ( ann ) based on heat principle of metals . the model is shown to be feasible 其次，在电路中短路电流计算的基础上， （ 1 ）进行母线的短路动稳定校验计算：采用模拟退火算法（ sa算法）计算了矩形母线短路电动力的最大值及其取极值的条件，获得了更为一般的结果，进而通过短路电动力的频谱分析，给出了铜质母线的有关短路校验计算数据； （ 2 ）进行母线的短路热稳定校验计算：讨论了热稳定校校的几种常用计算方法，从导体或电器的发热机理出发，运用人工神经网络理论对母线的热稳定问题进行计算，通过算例比较，证明该方法用于热稳定计算是可行的。
It utilizes zero impedance branch characteristic , combining structure - transform and structure - static short - circuit current calculation method to calculate the short - circuit current directly through the electrical equipment when short - circuit fault takes place at the two sides of the electrical equipment , and settles the problems that the traditional method cannot directly figure out the short - circuit current 该方法利用零阻抗支路特点,结合定结构和变结构短路电流计算方法,能够直接求出在电气设备两侧分别发生短路时,通过电气设备(如断路器)的短路电流,从而合理地解决了传统的故障分析方法不能直接求出流过设备的短路电流的问题。
This paper introduced principle of magnetism - photo optical - fiber electric current measurement system , and designs a digital magnetism - photo optical - fiber electric current meter . with the development of optical - fiber technology and electronic components reliability , the magnetism - photo electric current detection method will be used more widely 论述了磁光式光纤电流测试系统的原理，并设计了一种数字式磁光光纤电流计，该装置所运用的测量方法是电力系统中高压大电流测量技术的一个新方向，随着光纤技术和电子器件可靠性的发展，磁光式电流检测技术可望得到推广使用。
The basic software consists of topology analysis , on - line load flow computation , state estimator , security analysis , dispatchers training simulator , short circuit current computation , and voltage / reactive power optimize , etc . the derived softwares consist of load control , capacitor optimizer configuration , transformer and feeder load distribution , impedance computation of generator , etc . network analysis software is powerful dispatch tool , though witch the current state of the power system can be realize , then improve the security and economic potential Dms网络分析的基本软件有：网络结线分析、潮流计算、状态估计、负荷预报、短路电流计算、电压无功优化等。派生软件有：负荷控制、电容器优化配置、变压器与馈线负荷分配、电源阻抗计算等。网络分析软件是有力的调度工具，通过它可以了解和掌握当前的运行状态，从而挖掘安全和经济方面的巨大潜力。
