中性点不接地系统

中性点不接地系统电容电流测试

Discussion on Capacitance Current Measuring Method in Isolated Neutral System

10～35kV中性点不接地系统中防止PT高压熔断器熔断的方法

An effective method for preventing high voltage fuse of Pt from breaking in 10 ~ 35 ? Kv isolated neutral system

基于DSP的中性点不接地系统接地故障支路判别

The Determination of Grounded Fault on Branch Circuit of Power Network with non-grounded Neutral on the Basis of DSP

首先文章对中性点不接地系统发生单相接地以及弧光接地的过程进行分析，并用Matlab对这些过程进行仿真。

At the first , the paper analyze the single phase fault and ferroresonance fault , these process are emulated by Matlab .

本文推导出用结点阻抗矩阵进行中性点不接地系统中任意两点异相接地故障计算公式，并编制程序在IBM机上调试通过，最后进行了算例分析。

This paper has derived calculating formulas of arbitrary two point faults in neutral non-grounded power system by bus impedance matrix . An example of calculation is carried out with IBM computer .

用EMTP仿真计算了10kV中性点不接地系统电磁式TV饱和引起的铁磁谐振。

The ferroresonance , which results from the electromagnetic potential transformer in a 10 kV distribution system , is simulated and studied by the Electro-Magnetic Transient Program ( EMTP ) .

用MATLAB软件仿真研究了中性点不接地系统中电磁式电压互感器在系统正常和接地故障运行的全过程，分析了TV励磁涌流造成熔丝熔断的规律性及开口三角绕组电压异常的原因。

By MATLAB , the transient process of TV in ungrounded power system is simulated , both in normal service or in some kinds of grounding fault conditions . This paper discusses the magnetizing inrush current flowing through TV and the abnormal overvoltage of opened delta-winding .

同时利用MATLAB中的小波工具箱对某10kV中性点不接地系统单相接地故障激发的铁磁谐振进行了分析，检测故障发生时刻以及判断谐振的发生和频率。

Besides , the wavelet toolbox in MATLAB is also used to analyze the ferromagnetic resonance caused by single-phase earthed fault in a 10 kV neutral isolated power system , detect the time of the fault and determine the resonance frequency .

阐述了中性点不接地系统中单相接地时的参数变化，并对相关的保护形式和新型TY系列单相接地选线与定位保护的原理进行了分析和探讨。

This paper describes the parameter variation of single-phase earthing in neutral non-grounding system , and analyses and discusses the relevant protection form , wire selection for new type TY series single-phase earthing and principle of positioned protection .

中性点不接地系统断相故障实例分析

Analysis of Phase out Fault in Neutral Non - grounded System

中性点不接地系统触电事故分析

Analysis on getting an electric shock accident of neutral point non-grounded system

某中性点不接地系统的断线谐振分析

Analysis of Resonance Due to Line Cut-out in an Un-neutral Grounding System

基于广域相量测量的中性点不接地系统在线故障定位研究

Study on On-Line Fault Location for Distribution Networks Based on Wide Area Phase Measurement

中性点不接地系统中铁磁谐振频繁发生，对电力系统造成了较大损失。

Ferroresonance frequently occurs in neutral-unearthed systems in the last years , and has resulted in serious damage .

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 .

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。

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

中性点不接地系统发生单相接地故障时，信号微弱，不易选线，对于谐振接地系统选线更加困难。

It is difficult fo select wire when there be single phase grounded fault in neutral point ungrounded system .

电压升高通常持续数秒或略少些，但也可在中性点不接地系统中持续数小时。

Voltage swells usually have durations of several seconds or less , but can last several hours in an ungrounded system .

本文推出中性点不接地系统在单相着雷接地第一次发弧时，健全相的过电压概率分布密度函数。

This paper infers the probability distribution function of the overvoltage in transmission lines in ungrounded system , when the single phase is grounded at the first arcing over .

通过对龙洞水电站二号机组出现的单相接地保护误动的实地分析、检验和排除，进一步探讨总结出中性点不接地系统单相接地故障的现象判断和处理方法。

Based on the analysis on the misoperation of single-phase earthing fault of 2 # unit of Longdong hydroplant , a summary on judging the single-phase earthing in isolated neutral point system and eliminating measures is described .

在矿井三相供电系统中，中性点不接地系统中单相故障接地相的判断法：三相电压中以指示值最高相为依据，按相序顺序往下推移一相才是故障相。

In the three-phase power supply system in mining wells , the method to detect the single-phase breakdown earth phase in the system of neutral point unconnected to earth is the next to the phase with the highest voltage in the three-phase voltage is the breakdown phase .

中性点不接地电力系统电容电流的补偿及测量接地电容电流的实测及补偿

Compensation for and measurement of Condenser Current of Neutral-point-unearthed Electric Power System

中性点不接地电力系统单相漏电监测和选线装置的研究

Research of Single Phase-to-ground Monitor and Line Selection Installment for Electrical Power System with Ungrounding Neutral Points

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 .

以中性点不接地供电系统漏电保护作为研究对象，阐述了选择性漏电保护的概念及其重要意义；

Take the electricity leaks protection which in the middle point ungrounded electric power system as researched object . explains the concept and the important meaning of alternative electricity leakage protection ;

基于分布参数电路理论，针对中性点不接地三相系统特点，提出了树型配电线路单相接地的多频法故障诊断。

Based on distributed parameter circuit theory , the algorithm of fault diagnosis-multifrequency excited method to locate single-line-to-ground fault on the ungrounded 3-phase system is proposed in accordance with the characteristic of the system .

对煤矿井下中性点不接地供电系统远方与就地漏电试验的方法进行了比较，认为远方漏电试验可以验证就地漏电试验，是检验漏电保护可靠性的重要措施；

By comparing remote leakage test with on-the-spot leakage test in underground power supply system without the neutral line earthing , this article considers that the remote test can verify the on-the-spot one and is an important leakage protection measure .

本文介绍了S注入法选线定位新原理，并依据此原理设计了中性点不接地电力系统单相漏电监测和选线装置。

This article introduced " S injection method ", the new principle for selection and position of faulty line , and designed single phase-to-ground line monitor and selection installment , which based on this principle , for the electrical power system that the neutral point does not grounding .

对于中性点不接地的电力系统，在发生单相接地时，接地电流决定于另两相电容电流。

In the case of neutral-point-unearthed electric power system , earthed current depends on another two phases of condenser current when monophase ground connection takes place .

正常对称运行时，中性点不接地或绝缘系统的中性点由于系统对地电容的存在而保持地电位。

With normal balanced operation the neutrals of an ungrounded or isolated system are held at ground potential because of the presence of the system capacitance to earth .