1) transient fault
瞬时性故障
1.
The study shows that in the case of solid permanent grounding, the ratio of the voltage in the fault phase shunt reactor to the voltage in the neutral point reactor is always larger than that for transient faults.
针对带并联电抗器的超高压输电线路,研究了故障后线路断开相并联电抗器与中性点小电抗上的电压特性,发现在永久性故障时,无论是金属性接地还是经过渡电阻接地,断开相并联电抗器上电压与中性点小电抗上电压的比值总是大于瞬时性故障时两者的电压比值。
2.
It can distinguish transient fault from permanent fault occurred on the EHV(Extra High Voltage) transmission line.
当瞬时性故障发生时,在短路点电弧熄灭后的恢复电压阶段,断开相各电气量的关系与永久性故障将有本质的不同。
3.
Based on extensive investigation, this paper presents a new method of distinguishing the transient faults and permanent faults on transmission lines.
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。
2) temporary fault
瞬时性故障
1.
On the basis of detailed research a new method isproposed which can distinguish the temporary faults frompermanent faults in transmission lines.
经研究提出了一种新型的区分输电线路单相瞬时性故障与永久性故障的方法。
2.
Analysis result shows that the recovery voltage of single-phase temporary fault is superposed by free component and power frequency component, and its power spectrum possesses two spectral lines; yet the recovery voltage of single-phase permanent fault contains power frequency component only, and its power spectrum .
分析了带并联电抗器的高压输电线路发生单相接地故障时故障相恢复电压的特性,结果表明: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,其功率谱有2条谱线;而单相永久性故障时的恢复电压中只包含工频分量,其功率谱有1条谱线。
3.
On the basis of compare virtue and defect for existed discriminances, this paper elicited calculational expression of the open phase terminal voltage and calculated the frequency for current and voltage of the phase that is switched off with shunt compensators, and criterions to determine temporary fault and permanent fault is proposed.
本文在分析已有判别方法优缺点的基础上,通过对单相接地故障电弧熄灭后的恢复电压阶段进行较为详细的特性分析,得出了断开相端电压的计算表达式以及带并联电抗器情况下断开相端电压及线路电流所包含的频率成分,提出了判别瞬时性故障和永久性故障的新方法。
3) transient faults
瞬时性故障
1.
Identification of transient faults for single-phase transmission line;
输电线路单相瞬时性故障的判别研究
2.
Taking the virtual value of three phase voltage as the input with its scale changed,the network learning can be completed with convergence reached after the process of fuzzification,normalization and perspicuity,so it can disinguish transient faults from permanent faults.
为了避免重合闸重合于永久性故障,将模糊神经网络应用于三相自适应重合闸中,构造了一个多输入的模糊神经网络,设计了网络的算法,将三相端压有效值作为输入,经尺度变换、模糊化、归一化和清晰化,并利用梯度下降法修正误差,使得网络完成学习并最终收敛,在输入故障数据时能根据网络的输出结果准确地判别瞬时性故障与永久性故障。
3.
Finally the relay can identify that the line has transient faults or permanent faults by the value of secondary arc current.
具体方法是在单相重合前,保护使用贝瑞隆模型计算线路故障点两侧的电流,进而求出故障点处的潜供电流,然后根据其有无,来区分线路是永久性故障还是瞬时性故障,从而达到避免重合于永久性故障的目的。
4) instantaneous fault
瞬时性故障
1.
The current situation of the research on distinguishing permanent faults from instantaneous faults in transmission lines is presented.
前者判别的准确性受PT二次回路可靠性的影响,且因带并联电抗器线路的恢复电压低而无法采用;后者则因电弧电压不足额定电压的5%而在测量、分析和判断中存在可信度的问题,且电弧存在与瞬时性故障能否等价也值得讨论。
2.
An adaptive single-phase reclosing scheme based on wavelet neural network is presented to overcome the fault of voltage criteria of adaptive single-phase reclosing in distinguishing the instantaneous faults from permanent fault.
自适应重合闸的首要问题是正确判别瞬时性故障和永久性故障,针对故障时丰富的暂态信息,提出了一种基于小波神经网络式单相自动重合闸的方案,通过小波变换算法提取故障暂态信号特征量后,再利用ANN的非线性拟合和自学习能力进行故障判别,确定正确的重合闸策略。
3.
The method overcomes the shortcomings when voltage criteria are employed to distinguish instantaneous faults from the permanent ones.
提出了基于RBF神经网络的单相自动重合闸的方案,将RBF神经网络用于其中,建立了一个三层前向网络模型 利用EMTP及MATLAB进行了大量的仿真实验,验证了其可行性,并克服了自适应单相重合闸的电压判据在判别瞬时性故障与永久性故障时存在的缺陷。
5) permanent fault
瞬时性故障
1.
The amplitude of the voltage at the fault point of the opened phase conductor is discussed in case of temporary or permanent faults.
分析了未装设并联电抗器的超高压输电线路断开相故障点电压在瞬时性与永久性故障情况下的幅值特征及其与该点健全相电压之间的相位关系,指出瞬时性故障点电压与该点两健全相电压和同相位,而永久性故障时该点电压与该点两健全相电压和的相位差随过渡电阻及线路长度的减小而接近90度,据此提出了判断故障性质的相位判据,并针对金属性故障及线路出口处的低阻故障情况提出了补充判据,该判据可准确地判断故障性质且对于测距误差与线路参数估计误差具有良好的自适应性,大量仿真实验验证了所得结论。
2.
Main problem with the conventional reclosure scheme is a risk of a second shock to the system in the case of a permanent fault, when may lead to system oscillation.
电力系统输电线路中的短路故障大多数是瞬时性故障,因此,自动重合闸技术已经广泛应用于电力系统中,大大提高了供电的可靠性。
6) transient fault
瞬时故障
1.
The results indicate that besides holding better tolerance for transient faults,the asynchronous running based on the temporal redundancy is cost-efficient and applicable to t.
结果表明:基于时间冗余的异步运行代价较小,对瞬时故障有较强的容忍能力,符合未来处理器多线程、高可靠的发展要求;改进调度方式以消除冗余的存储访问,对RMT的性能提升至关重要;挖掘冗余线程的运行特点并结合具体硬件结构的故障特点,才能设计出高效、实用的容错机制。
2.
Hardware transient faults can cause control flow errors and corrupt the normal execution process by altering the operand and opcode of instructions.
硬件瞬时故障可以通过修改指令操作码和操作数的方式引发控制流错误,破坏程序的正常执行。
3.
Time redundancy is used to reduce faulty alarm rate for transient faults of nodes in WSNs.
对于网络中存在的节点瞬时故障,通过时间冗余的检测方法,降低故障诊断的虚警率。
补充资料：连续性与非连续性(见间断性与不间断性)
连续性与非连续性(见间断性与不间断性)
continuity and discontinuity
11an父ux泊g四f“山。麻以角g、.连续性与非连续性(c。nt，n琳t:nuity一)_见间断性与不间断性。and diseo红ti-
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条