永久性故障

对故障相恢复电压进行步长为20ms的差分，瞬时性故障时差分后的电压幅值较大，而永久性故障差分后电压幅值基本为零。

Its frequency is power frequency . 20 ms-step differential of fault phase recovery voltage is used to distinguish transient fault from permanent fault .

带并联电抗器输电线路永久性故障的时域判别方法

Time-domain method to identify permanent fault of transmission line with shunt reactor

利用MATLAB软件进行了大量仿真实验，验证了其在带并联电抗器的超高压长输电线路的瞬时性故障与永久性故障的识别中具有良好的可行性。

The results of simulation by MATLAB show that this method is valid to distinguish the transient faults and permanent faults on transmission line with shunt reactors .

复线电力牵引网瞬时与永久性故障识别方法

Detecting Methods of Transient Faults and Permanent Faults for Multiple Line Traction Network

输电线路永久性故障判别方法综述

A Survey on Methods to Distinguish Permanent Faults from Instantaneous Faults in Transmission Lines

硬件的冗余可以较好地实现主控制器的间歇性与永久性故障，保证系统的稳定性。

In the system , hardware redundance can tolerant both transient and permanent failures of the main controller .

在该方案中主要讨论了AT自耦变压器保护功能的实现原理，以及供电臂发生永久性故障时供电臂自动控制方案的实现原理。

In the new scheme , the protection principle of AT and the auto-control principle of feeder are discussed .

超高压输电线路的单相接地故障主要分为永久性故障和瞬时性故障，并且瞬时性故障是单相接地故障的主要表现形式。

Single-phase grounding fault of EHV transmission line is mainly divided into two states : permanent fault and transient fault .

针对带并联电抗器的超高压输电线路，提出一种单相自适应重合闸永久性故障识别的新方法。

A novel method of identifying permanent fault for single-phase adaptive reclosure in transmission lines with shunt reactors is proposed .

但自适应重合闸在某些情况下，会分不清线路到底发生了瞬时性故障还是永久性故障，仍有一定的缺陷。

But in some cases , adaptive reclosing can confound instantaneous fault with permanent fault , so it has fault too .

它们共同的缺点就是在重合闸之前，完全是盲目的动作，无法区分线路发生的是瞬时性故障还是永久性故障。

Their common shortcoming is that they act blindly entirely before reclosing and can not distinguish instantaneous fault from permanent fault .

只在瞬时性故障时实施重合闸，避免了永久性故障情况下重合对系统的巨大冲击。

Only in the implementation of instantaneous reclosure failure to prevent a permanent fault conditions coincide huge impact on the system .

在分析带并联电抗器输电线路单相故障特点的基础之上，提出一种利用参数识别原理的单相自适应重合闸永久性故障识别方法。

For transmission lines with two shunt reactors , this paper presents a novel method of identifying permanent faults for single-phase auto-reclosure .

提出了一种新型区分输电线路单相瞬时性故障与永久性故障的方法。

Based on extensive investigation , this paper presents a new method of distinguishing the transient faults and permanent faults on transmission lines .

由于瞬时性与永久性故障时，断开相恢复电压的组成不同，其功率谱存在较大区别。

As the composition of fault phase recovery voltage is different when transient and permanent fault occurs , the power spectrum is also in difference .

在串补系统中，虽然线路增加了串联电容器，但是故障识别判据仍然可以识别瞬时性故障和永久性故障。

In the series compensation system , although the increase of series capacitor circuit , the fault identification criterion still can identify transient fault and permanent fault .

本文围绕自适应重合闸，对故障产生前后故障相的电压信号进行分析，以寻找永久性故障和瞬时性故障的判据。

This paper focus on adaptive reclosing of the fault byr the fault phase voltage signal analysis to find permanent fault and the fault of instantaneous criterion .

为了消除重合于永久性故障对电力系统的危害，应该判断故障的类型，实现自适应重合闸。

In order to eliminate disserve in the permanent fault on the power system hazards , we should determine the type of fault to achieve adaptive reclosing .

提出了两种识别复线牵引网瞬时性与永久性故障的方法&电压识别法和补偿电压识别法。

Two methods , voltage detecting method and compensated voltage detecting method , are proposed for detecting the permanent faults and transient faults of multiple line traction network .

瞬时性故障时，恢复电压由工频周期分量和非工频衰减分量组成，永久性故障时，恢复电压仅由工频周期分量组成。

The recovery voltage contains power frequency component and low-frequency decaying component when transient fault occurs , and it only contains power frequency component when permanent fault occurs .

提出了一种用于区分输电线路瞬时性故障和永久性故障的新方法：利用高频通道及其信号区分瞬时性故障和永久性故障，从而实现三相自适应重合闸。

This paper brings forward a whole new scheme of three-phase adaptive reclosure , which uses the carrier channel and its signals to distinguish transient faults and permanent faults .

分析了输电线路发生单相接地故障时，永久性故障与瞬时性故障电弧燃烧的特性，提出一种基于动态小波变换的自适应单相重合闸故障类型的判别方法。

A novel method which uses the fault phase current characters of shunt reactors to identify permanent faults for single-phase autoreclosure on transmission lines is presented in this paper .

仿真实验验证该判据能可靠区分瞬时性故障和永久性故障，并且有较高的灵敏度。

For transmission lines with no shunt reactor , the magnitude and the angle of the recovery voltage of fault phase under permanent faults are quite different from that under transient faults .

区分瞬时性和永久性故障为目的的自适应重合闸，能减少故障对电能的损失，增强电网的稳定性。

The self-adaptive reclosure , which is aimed to distinguish the transient fault and the permanent fault , can reduce the power loss caused by faults and enhance the stability of power system .

研究表明单相瞬时性故障时的恢复电压由自由分量与工频分量叠加而成，而永久性故障时的恢复电压中只包含工频分量。

The results show that recovery voltage of temporary fault contains the components of power frequency component and free component , while the recovery voltage of permanent fault only contains power frequency component .

该判据通过对线路断开瞬间由于残余能量衰减而引起的线路自振电压特性的分析，能准确区分瞬时性故障和永久性故障，从而保证了重合闸的正确动作。

The judgment can distinct exactly the suspend fault or permanent fault through analyzing the natural vibration voltage caused by residual energy attenuation and so that it makes sure that the reclosure operates correctly .

配电网发生永久性故障后，调度人员需要根据具体情况重新设定开关的运行状态，隔离永久性故障区域，恢复非故障区域的供电。

After permanent fault occurs to power distribution system , dispatchers need to change the operation status of switches accordingly , segregate permanent fault area and resume power supply to other areas without fault .

该判据以故障点瞬时故障电压理论值为定值，由故障测距结果求出故障点实际电压，当故障点实际电压小于定值时为永久性故障，反之为瞬时性故障；

This criterion uses the fault location result to get the fault point voltage and take the fault point voltage in theory as the setting value to distinguish the permanent fault from temporary fault .

但若盲目重合于永久性故障，不仅会使电力系统又一次受到短路电流的冲击，还会使电气设备条件恶化。

However , the implementation of a permanent fault conditions reclosing not only will the power system is once again under the impact of short-circuit current , but also to make electrical equipment conditions to deteriorate .

在超高压输电线路中采用的自适应重合闸在发生故障跳闸后，可以自动地检测故障的性质类型（是瞬时性故障还是永久性故障），避免重合于永久性故障。

After the adaptive reclosures adopted in extra high voltage transmission lines trip , it can automatically determine what kind of faults ( transient faults or permanent faults ) occurred and avoid reclosing with permanent faults .