中性点

This thesis has analyzed the movement mode of syntony electrical network of neutral point after the quenching of arc coil grounding, studied and analyzed the selective leakage protection principle based on the zero sequence active power.

本文分析了中性点经消弧线圈接地的谐振电网运行方式，研究和分析了基于零序有功功率的选择性漏电保护原理。

Overvoltages may also be produced by certain types of asymmetrical fault mainly on systems with ungrounded neutral s.

在中性点不接地系统中，过电压也可能主要由某些类型的不对称故障所引起。

Vector synthetic method has high measure precision but reference energy meter needs to be connected to zero point of reference meter and system.

三表法测量无间断点，校验过程中需改变电流元件接线；矢量法采样精度高，校验时需标准表与系统电压中性点连接；两表法测量有间断点，校验时需改变电压元件接线。

On the basis of analyzing the law of variation of the zero order current , the zero order voltage and the zero order power in the isolated neutral system, a synthetic criteria principle of selecting the grounded fault line according to three criterias at the same time was put forward.

在对中性点不接地系统单相接地故障情况下零序电流、零序电压以及零序功率的变化规律做了认真分析的基础上，提出了采用3个判据同时判断的故障选线三合一综合判据原理，这个综合判据可以大大提高接地选线的准确率，具有一定的推广利用价值。

Main configuration features of some protections are discussed in detail,such as the main protection configuration scheme of generator with different neutral point leadout modes ,the principle of inter -turn protection configuration,configuration schemes of branch differential protection and zero-sequence differential p

详细讨论了一些主要的保护配置特点。如中性点引出方式不同的发电机主保护配置方案，匝间保护的配置原则。主变压器的分侧差动和零序差动的配置方案。和其他保护的配置特点。简单分析了保护用电流互感器的选型问题。

This paper presents the following questions about earthing breakdown protection and optionality,connection of voltage transformer,the type-selecting of arrersters and cable after middle voltage system earths through low resistance .

主要介绍了中压系统中性点经低电阻接地后，中压系统接地故障保护的设置问题及上、下级选择性、电压互感器的接线、避雷器及电缆的选型

Negative skin friction,axial force of the pile body and neutral point which provide reference for engineering are researched by using finite element sofware ABAQUS. It is about the properties of overlength piles with practical engineering parameters and conditions under silt sediment.

采用有限元软件按实际工况模拟长时间、大面积促於条件下桩侧摩阻力、桩身轴力、中性点等随促於时间的发展变化，为围垦区促於提供理论支持。

The voltage equations of the main circuit and control circuit,and the equivalent circuit of the controlled saturable reactor were analyzed.

为了限制电容电流，采用中性点经消弧线圈接地的补偿系统成为最主要的方式。

DC current monitoring data collected from neutral points of some transformers and geomagnetic storm data during many geomagnetic storms are performed comparative and relevant and statistical analysis sequently.

2对多次磁暴发生时采集的变压器中性点直流监测数据和磁暴数据进行对比分析、相关分析和统计分析，首次获得了中低纬电网GIC的特点和规律。

In most high voltage systems the neutral s are directly grounded, i.e. connected directly to the ground with the exception of generators which are grounded through a resistance to limit stator fault currents.

在大部分高压系统中，中性点是直接接地的，即直接与地联接，例外的是发电机通过电阻接地以限制发电机定子故障电流。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。