The analysis shows that the measured impedance at the head of the line is not proportional to the fault distance when a three-phase fault occurs at the end of the line.
分析表明，线路末端三相故障时，线路首端的测量阻抗不与故障距离成正比。
Because the impedance fault location method is easily influenced by the factor such as fault resistance, transformer error and asymmetrical line configuration, the fault location accuracy is lower.
由于阻抗法易受过渡电阻、互感器误差、线路结构不对称等因素的影响，所以测距精度不高。
The traditional fault location method based on impedance can not overcome the effects of transition resistance, etc.
传统的阻抗法进行故障定位，难以克服过渡电阻等因素的影响。
In typical six-phase transmission system, half positive sequence, half zero sequence and half negative sequence fault components are independent of the variance of system impedance.
在典型的六相输电系统中，半正序、半零序和半负序故障分量不受系统阻抗变化的影响。
Power lines have set impedance per kilometre and using this value and comparing voltage and current the distance to a fault can be determined.
通过对比电缆整定的单位千米阻抗值和电压电流值，来确定线路上的故障点。
Based on the analysis of AC impedance and two poles voltage test data, the reason of turn - to - turn short circuit fault caused by having copper dregs in generator rotor winding was found.
基于交流阻抗和两极电压试验数据的分析，发现发电机转子绕组因存在铜渣而造成匝间短路故障的原因。
The location results are always affected by fault resistance in almost all conventional impedance methods in fault location, but the application of power balance theory can overcome the shortcoming.
利用功率平衡理论进行故障测距能够在原理上克服传统阻抗法普遍存在的受故障电阻影响的缺陷。
The fir st two methods have low precisions for influence oft these cases : line parameters , fault point grounding impedance , operating mode of power system.
前两种方法因受一些情况例如参数、故障点接地阻抗、运行模式等影响而具有较低的精确度，而行波法具有较高的精确性。
This paper considers comprehensively water source, water pressure, impedance water strata, and fault ectal factors to establish a ANN forecast model for water-inrush from coal floor.
本文综合考虑水源、水压、隔水层、断层等因素对煤层底板突水的影响，建立了煤层底板突水人工神经网络预测模型。
The algorithm does not need fault type identification, and its accuracy is not affected by fault resistance, system impedance, pre-fault load current and shunt capacitance.
算法无需故障类型判别，不受系统阻抗、故障电阻、负荷电流以及分布电容的影响。
The QSS (Quasi Steady State) model of converter which neglects the negative impedance of DC system will bring some errors when unbalanced fault occurs in AC system.
当交流系统发生三相不对称故障时，忽略直流系统负序分量的准稳态模型将给交直流混合系统的仿真带来较大的误差。
There existed three met hods for fault location : impedance method, fault analysis method and traveling wavemet hod .
精确故障定位的传输线是非常重要的电力系统。 故障定位有三个方法：阻抗法、故障分析法和行波法。
By taking impedance locus as an example, an algorithm of generating 3-d vector data and other graphs of 3-d analysis modules for fault analysis in power system are given.
以阻抗轨迹为例给出了三维矢量数据的生成算法及其他多种电力故障分析算法的三维分析模块图例。
The result shows the measured impedance is greatly influenced when SSSC is present in the fault loop, therefore measures should be taken to reduce the impacts of SSSC on the impedance relay.
结果表明，SSSC在故障范围之内时对阻抗继电器的测量阻抗产生了很大的影响，应该采取措施减小SSSC对阻抗继电器的影响；
This paper analyses the rule of variations measuring impedance of distance relay when phase to phase fault occurs between two lines on double circuit line on the same pole (DLSP).
从理论上分析了同杆并架双回线跨线不接地故障时距离继电器测量阻抗的变化规律。
The differential equation algorithm can accurately calculate the impedance from the splitting point to the fault point.
利用分段点处电流、电压应用解微分方程算法即可较精确地计算出线路阻抗。
So it is necessary to find some ways for the fault location detection. In the phase-to-earth fault power system, the value of zero-sequence impedance is directly related to the earth conductivity.
这样就降低了供电可靠性，故找出一种新思路使其能更准确有效地判断故障点具有重要意义。
So it is necessary to find some ways for the fault location detection. In the phase-to-earth fault power system, the value of zero-sequence impedance is directly related to the earth conductivity.
这样就降低了供电可靠性，故找出一种新思路使其能更准确有效地判断故障点具有重要意义。
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