直接接地

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 .

介绍变压器中性点直接接地和不接地系统中人身触电电流的计算方法。

This paper introduces the calculating method of person shocking current in the sysytem of power supply of neutral dot direct ground connection and not ground connection .

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

在中性点非直接接地电网中，单相接地及由电压互感器（PT）引起的谐振过电压均是多发性的事故。

In ungrounded distribution system the single-phase-grounding and the ferro-resonance caused by the PT ( Potential Transformer ) are of the frequent accidents .

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 .

对直接接地系统的屏蔽地布线方法进行了研究，提出PCB端口屏蔽地就近直接与内部数字地平面共地，可以改善屏蔽接地效果。

It is proposed to directly connect the shield ground of PCB ports with the nearby internal logic ground plane , which improves the effect of shield .

PT谐振大多数发生在中性点不直接接地的配电网中，由电磁式电压互感器饱和引起，电磁式电压互感器的非线性特性是铁磁谐振产生的根源。

PT resonance occurs in the neutral point ungrounded system of electric distribution network frequently . The root cause of PT resonance is the nonlinear characteristics of the electromagnetic voltage transformer .

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

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 .

直流接地极电流对中性点直接接地变压器影响

The Influence of Current of DC Earthing Electrode on Directly Grounded Transformer

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

将收音机罩直接接地。

Make a ground connection directly to the radio housing .

非直接接地系统中检出单相接地线路的新方法

A new method for detecting single phase-to-ground fault line in non-solidly grounded network

直接接地系统铁磁谐振过电压计算分析

Calculation and Analysis of Ferroresonant Overvoltage Occurred in Neutral Effective Grounded Power 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

中性点非直接接地电网单相接地故障暂态特征分析

Analysis of Transient Characteristics of Signals Phase Earth Fault in Non - Solidly Earthed Network

我国配电网一般采用中性点不直接接地方式。

The neutral of system is generally indirectly grounded in power distribution network in China .

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 .

非直接接地系统单相接地故障选线方法综述

Survey of the methods to select single-phase fault line in neutral point indirectly grounded power system

发电机中性点直接接地引起发变组保护动作分析及预防

The Analysis and Prevention of Generator-Transformer Group Protection Caused by Neutral-point Solid Ground of Electronic Motor

禁止任一变压器中性点或发电机始点处直接接地。

No direct connection from either transformer neutral points or generator star points to earth is permitted .

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 .

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 .

并通过对比，找出井下变压器中性点不允许直接接地的原因。

Through contrast analysis , finds the reason of not allowed direct ground connection for transformer under the shaft .

出线断路器不装合闸电阻，高压侧不装并联电抗器，变压器中性点采用直接接地方式。

Its high voltage side is not equipped with parallel reactor and the neutral point of transformer is achieved by the direct grounding way .

单相接地短路和两相接地短路是中性点直接接地的三相电网中最常见的故障，约占所有短路故障发生总概率的85%。

In the neutral-point solid ground three-phase network , single-phase earth fault and two phase earth fault almost account for 85 per cent in all short-circuit fault .

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 .

提出了适用于非直接接地系统中发生单相接地故障时检出接地故障线路的一种新方法&零序电容电流补偿法。

A new method for detecting single phase to ground fault line in non solidly grounded networks & zero sequence capacitance current compensation method is presented in the paper .

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 .