中性点直接接地系统

分别对中性点直接接地系统和不直接接地系统的铁磁谐振现象进行分析，从理论上证明了PT的铁损对铁磁谐振的阻尼作用。

Based on equivalent model of PT , this paper analyzes the reduced equivalent circuits to the power system with earthed and non-earthed neutral respectively .

基于ATP-EMTP对中性点直接接地系统铁磁谐振的仿真和消谐措施研究

Simulation and resonance-erasing measurement for ferroresonance of neutral grounding system based on ATP-EMTP

同样是三相电网的单相接地，发生于中性点直接接地系统称单相短路故障，而发生于中性点绝缘系统叫接地漏电故障。

The single earth-fault in three phase network earthed neutral is called as single phase short circuit , and that in three phase network insulated to earth is called as leakage fault .

本文综合运用多种数学工具，对中性点直接接地系统铁磁谐振过电压的混沌特性与控制及其检测方法进行系统的研究。

The paper uses several kinds of mathematic theorem to research the chaos characteristics , methods of chaos control and extracting features quantities of ferroresonance overvoltage oriented to the neutral grounded system .

中性点非直接接地系统中电磁式PT引起的谐振过电压

Resonance Overvoltage Phenomenon on Electromagnetic PT in Neutral-point Indirect Earthing System

本文就中性点非直接接地系统中电磁式PT引起的谐振过电压现象进行分析并确定其铁磁谐振过电压的性质，由此采取措施防止并消除谐振。

This article focuses on resonance overvoltage phenomenon caused by electromagnetic PT in neutral-point indirect earthing system . It also analyses ferroresonant overvoltage character , as well as some steps to prevent or eliminate resonance .

中性点非直接接地系统的单相接地故障测距新算法

A New Fault Location Algorithm for Single-Phase-to-Earth Fault in Non-Direct-Grounding Neutral System

中性点非直接接地系统铁磁谐振的产生及措施

Ferromagnetic Resonance Over-voltage in Neutral-point Indirect Earthing System

而对中性点非直接接地系统单相接地故障选线原理的研究，多年来取得了很多成果。

The study of line selection of single phase earth fault , make many progress .

在小电流接地系统（中性点非直接接地系统）中，发生单相接地故障的概率很高。

In the neural indirectly grounded power systems , the single phase to earth fault occurs most frequently .

提出了一种输电线路中性点非直接接地系统双相对地故障的准确测距方法。

An accurate algorithm for locating double phase_to_earth fault on transmission line of non_ direct ground neutral system is presented .

大庆油田配电网采用中性点非直接接地系统，由于配电网所带负荷较多，线路较长，分支较多，单相接地故障也频繁发生。

Non-effectively ground system was adopted in Daqing oilfield distribution network and the single-phase ground faults happened frequently because of the over loading , long-distance lines and more branchs .

小电流接地系统是指中性点不直接接地系统，其中大多数采用中性点经消弧线圈接地方式。

The small current neutral grounding system is a kind of system without neutral grounding , in most of which the neutral point connects to ground through a reactor .

相对于中性点非直接接地系统而言，发生在中性点直接接地系统中的铁磁谐振过电压有着许多新的特点，而且对它的研究相对较少。

Compared with neutral ungrounded power system , ferroresonance overvoltage occurred in neutral grounded power system has more new features , and the research about it is much less .

要实现电力电缆的在线故障测距，必须考虑的几个难题是：中性点非直接接地系统是否能产生有效的故障暂态行波；

First , whether or not can effective traveling wave due to cable fault be found to locate the fault point in cable system whose transformer neutral point not directly grounded ?

文章从理论上阐述了引起中性点不直接接地的配电系统在正常运行中以及线路出现单相接地故障后中性点位移的各种影响因素，以及对各线路零序有功功率大小和方向的影响；

This paper described the factors which cause the neutral point potential rise and effect on the zero sequence active power flow in the neutral point un - directly grounded distribution systems both in normal operation and in single phase - to - ground fault operation conditions .

用该模型仿真了不同中性点接地方式下的故障电流波形特征，解答了中性点非直接接地系统能否产生可利用的暂态行波的问题；

Within this model , the characteristic of fault current is simulated in different grounding modes , and so to answer the question whether or not effective traveling wave can be found in cable system whose transformer neutral point not directly grounded .

中性点不接地系统和中性点经消弧线圈接地系统统称为中性点不直接接地系统，广泛应用于铁路配电系统中。

Non - ground neutral system and arc-suppression-coil - ground neutral system are called non-direct ground neutral system .